JPH1140961A - Withdrawal preventing tool for printed circuit board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the withdrawal preventing tool for a printed circuit board by which the printed circuit board is easily drawn out up to a prescribed position and the press contact with a container unit is easily released, with respect to the withdrawal preventing tool for a printed circuit board, that prevents the printed circuit board contained in the container unit from being drawn out excessively. SOLUTION: This withdrawal preventing tool for a printed circuit board that prevents a printed circuit board 37 contained in a container unit from being drawn out excessively is provided with a stationary member 31 fixed to the printed circuit board 37 and a rotary member 32 fixed to the stationary member 31 freely trunably in the direction vertical to the stationary member 31, and a press contact section 33d that is press contacted with the container unit is formed to a lower end of the rotary member 33 in the drawing direction of the printed circuit board 37.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed wiring board pull-out preventing device for preventing a printed wiring board stored in a storage unit from being excessively pulled out.

[0002]

2. Description of the Related Art Conventionally, as a printed wiring board pull-out preventing device for preventing a printed wiring board stored in a storage unit from being excessively pulled out, for example, as shown in FIG. 3 are known. The contact plate 3 is formed from a plate material having spring properties, and a flexible portion 3a is formed on the fixing member 1 side of the contact plate 3.

An abutting portion 3b is formed on the opposite side of the flexible portion 3a from the fixing member 1, and a lever portion 3c is formed at the tip of the abutting portion 3b. As shown in FIG. 15 and FIG.
The fixing member 1 is attached below the printed wiring board 5 to be erected, and together with the printed wiring board 5, the storage unit 7 is mounted.
It is stored in.

The storage unit 7 is provided with an insertion guide 9 and a guide rail 11 which are positioned when the printed wiring board 5 is inserted.
A connector 15 is attached to 3. The printed wiring board 5 includes a detachable lever 17 used when the printed wiring board 5 is attached to and detached from the storage unit 7, a connector 19 connected to the connector 15 of the back board 13,
An adapter 25 for connecting the plug 23 of the optical cable 21 is attached.

In the printed wiring board 5 provided with the printed wiring board pull-out preventing device, the printed wiring board 5 is pulled out of the storage unit 7 as described below. That is, first, the detachable lever 17 is operated, and the connector 19 of the printed wiring board 5 is detached from the connector 15 of the storage unit 7 by the leverage action of the detachable lever 17.

Next, as shown in FIG. 17, the printed wiring board 5 is pulled out along the guide rail 11. At this time, the printed wiring board 5 has a contact portion 3b of the contact plate 3,
The storage unit 7 is pulled out to a position where it comes into contact with the insertion guide portion 9. In this state, the plug 23 of the optical cable 21
Is removed from the adapter 25.

Then, the lever 3c of the contact plate 3 is lifted upward, the contact between the contact portion 3b and the insertion guide 9 is released, and the printed wiring board 5 is pulled out of the storage unit 7.

[0008]

However, in such a conventional draw-out preventing device for a printed wiring board, the contact plate 3 is not provided.
Is formed of a plate material having a spring property, for example, as shown in FIG. 18, when the printed wiring board 5 is accidentally pulled out strongly, as shown in FIG. 18, the insertion guide portion 9 of the contact portion 3b.
There is a problem that the flexible portion 3a is deformed due to the impact of contact with the printed wiring board, and the printed wiring board 5 is pulled out excessively.

If the printed wiring board 5 is pulled out excessively, the plug 23 of the optical cable 21 moves together with the adapter 25 of the printed wiring board 5, so that an excessive force is applied to the optical cable 21 and C1 in FIG. As shown in (1), there is a possibility that the optical cable 21 may be damaged.
When the pull-out force of the printed wiring board 5 is strong, there is a fear that the contact plate 3 is broken as shown by C2 in the drawing.

Further, in order not to break the contact plate 3,
If the spring force of the flexible portion 3a is increased by increasing the thickness of the contact plate 3 or the like, a strong force is required to lift the lever portion 3c of the contact plate 3 upward, and the contact portion 3b There is a problem that it is difficult to release the contact with the insertion guide 9. The present invention has been made to solve such a conventional problem, and it is possible to reliably pull out a printed wiring board to a predetermined position, and to easily release contact with a storage unit. An object of the present invention is to provide a pull-out preventing device for a printed wiring board.

[0011]

According to a first aspect of the present invention, there is provided a printed wiring board withdrawal preventing device, wherein the printed wiring board is attached to the printed wiring board in order to prevent the printed wiring board from being excessively pulled out of the storage unit. In the board pull-out preventing device, a fixing member fixed to the printed wiring board,
A rotating member fixed to the fixing member so as to be rotatable in a vertical direction, and a contact portion abutting on the storage unit is provided at a lower end of the rotating member on a side in which the printed wiring board is pulled out. It is characterized by being formed.

According to a second aspect of the present invention, there is provided the printed wiring board withdrawal preventing device according to the first aspect, wherein the rotating member is provided on the side opposite to the withdrawing direction toward the withdrawing direction. An inclined portion inclined downward is formed.

According to a third aspect of the present invention, there is provided the printed wiring board withdrawal preventing device according to the first or second aspect, wherein the pivoting member is provided on the side of the pivoting member in the pull-out direction. Characterized in that a lever portion for rotating the lever is formed. According to a fourth aspect of the present invention, there is provided the printed wiring board withdrawal preventing device according to the third aspect, wherein the fixing member has an upper regulating portion which regulates upward rotation of the lever portion. It is characterized by having been done.

According to a fifth aspect of the present invention, there is provided the printed wiring board withdrawal preventive device according to the third or fourth aspect, wherein the fixing member has a downward rotation of the lever portion. In addition to the regulation, a lower regulation portion for regulating the downward movement of the contact portion and the inclined portion of the rotating member is formed. According to a sixth aspect of the present invention, there is provided the printed wiring board withdrawal prevention device according to any one of the first to fifth aspects, wherein the fixing member is provided at a center of the printed wiring board in the drawing direction. It is characterized by being fixed to a part.

According to a seventh aspect of the present invention, there is provided the printed wiring board withdrawal preventing device according to any one of the first to sixth aspects, wherein the printed wiring board withdrawal preventing device is erected in the storage unit. The fixing member fixed to the printed wiring board is fixed to a position where the rotating member does not protrude from a lower end of the printed wiring board.

According to a eighth aspect of the present invention, there is provided the printed wiring board withdrawal preventive device according to any one of the first to seventh aspects, wherein the printed wiring board withdrawal preventive device is installed upright in the storage unit. The fixing member fixed to the printed wiring board is fixed at a position where a power cutoff switch fixed to the printed wiring board is shut off by the rotation of the rotating member.

(Function) According to the first aspect of the present invention, the fixing member fixed to the printed wiring board includes:
The rotating member is fixed to be rotatable. When the printed wiring board is pulled out of the storage unit, the contact portion formed on the rotating member is brought into contact with the storage unit, and the rotating member is rotated in the vertical direction to store the contact portion. The contact with the unit is released.

According to the second aspect of the present invention, an inclined portion which is inclined downward in the pull-out direction is formed on the side of the rotating member opposite to the direction in which the printed wiring board is pulled out. When the printed wiring board is stored in the storage unit, the rotating member is rotated according to the shape of the storage unit, and the printed wiring board is stored smoothly. According to the third aspect of the present invention, the lever is formed on the pulling-out side of the rotating member, and the rotating member is easily rotated by the lever.

According to a fourth aspect of the present invention, there is provided a printed wiring board pull-out preventing device, wherein the fixing member has an upper regulating portion for regulating the upward rotation of the lever portion, and the printed wiring is formed by contact between the rotating member and the lever portion. Destruction of components mounted on the board is prevented. According to the printed wiring board withdrawal preventing device of claim 5,
The fixing member is formed with a lower restricting portion for restricting downward rotation and movement of the lever portion, the contact portion, and the inclined portion, and the inner wall surface of the storage unit includes the lever portion, the contact portion, and The inclined portion prevents rubbing and damage.

In the printed wiring board pull-out preventing device of the sixth aspect, the fixing member is fixed to the center of the printed wiring board in the pull-out direction, and the printed wiring board is pulled out from the storage unit by about half. Then, in a state where the printed wiring board is half housed in the housing unit, wiring connectors and components on the printed wiring board are attached and detached, or switches and the like are switched.

According to a seventh aspect of the present invention, the fixing member is attached to the printed wiring board so that the rotating member does not protrude from the lower end of the printed wiring board standing and stored in the storage unit. The printed circuit board is fixed to the storage unit, and the rotating member and the storage unit are prevented from coming into contact with each other due to the draw-out and storage of the printed wiring board. In the printed wiring board withdrawal preventing device of claim 8, the fixing member is fixed to the printed wiring board so that the rotating member is adjacent to the power cutoff switch,
At the same time when the contact of the rotating member with the storage unit is released, the power supplied to the printed wiring board is cut off.

[0022]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIGS. 1 and 2 show a first embodiment of a pull-out preventing device for a printed wiring board according to the present invention.
To claim 7). In the drawing, reference numerals 31 and 33 are a fixing member and a rotating member made of, for example, stainless steel.

The fixing member 31 has mounting holes 31a, 31a.
The rivets 35, 35 are used to form the mounting holes 31 a, 31 a and the mounting holes 37 of the printed wiring board 37.
a and 37 a are fixed, and the fixing member 31 is attached to the printed wiring board 37. The fixing member 31 has a mounting hole 31b formed therein. The mounting hole 31b and the rotating member 3 are formed by a rivet 39 and a washer 41.
3, and a mounting hole 33a is rotatably fixed.

A lever portion 33b is formed in a direction P in which the rotating member 33 is pulled out of the printed wiring board 37. An inclined portion 33c that is inclined downward in the pull-out direction P is formed on the rotating member 33 on the side opposite to the pull-out direction P of the printed wiring board 37. A contact portion 33d is formed on the lower end of the inclined portion 33c on the side of the pull-out direction P.

A contact surface 33e is formed on the side of the contact portion 33d in the pull-out direction P. Also, the fixing member 3
In the pull-out direction P of one printed wiring board 37, a bent portion 31c is formed in a direction perpendicular to the printed wiring board 37. The bent portion 31c includes the lever portion 3 of the rotating member 33.
A locking hole 31d for locking 3b is formed.

The lever 33b is provided above the locking hole 31d.
An upper regulating portion 31e for regulating upward rotation of the lever portion 33d is formed, and a lower regulating portion 31f for regulating downward rotation of the lever portion 33b is formed below the locking hole 31d.
As shown in FIG. 3, such a printed wiring board pull-out preventing device is attached to the lower center of the printed wiring board 37, and is housed in the storage unit 43 together with the printed wiring board 37.

The printed circuit board 3 is stored in the storage unit 43.
An insertion guide portion 45 and a guide rail 46 for adjusting the position when the 7 is inserted are formed, and a connector 49 is attached to the back board 47 of the storage unit 43.
The printed wiring board 37 includes the printed wiring board 3.
An attachment / detachment lever 51 used for attaching / detaching to / from the storage unit 43, a connector 53 connected to the connector 49 of the back board 47, and an adapter 59 for connecting the plug 57 of the optical cable 55 are attached.

Also, as shown in FIG.
Are the upper regulating portion 31 e and the lower regulating portion 31 of the fixing member 31.
f, and the rotation of the lever portion 33b causes the inclined portion 33c and the contact portion 33d to rotate at predetermined positions. Then, as shown in FIG. 5, when the printed wiring board 37 is stored in the storage unit 43, the lever portion 33 b is attached to the lower regulating portion 31 of the fixing member 31.
The contact portion 33d of the rotating member 33 is positioned below the upper end of the insertion guide portion 45.

In the printed wiring board 37 provided with the printed wiring board pull-out preventing device, the printed wiring board 37 is pulled out of the storage unit 43 as described below.
Further, it is stored in the storage unit 43. That is, first, when the printed wiring board 37 is pulled out of the storage unit 43, the detachable lever 51 is operated, and the lever 53 of the detachable lever 51 causes the connector 53 of the printed wiring board 37 to be connected to the connector 49 of the storage unit 43. Removed from

Next, as shown in FIG. 6, the printed wiring board 37 is pulled out along the guide rail 46. The printed wiring board 37 is connected to the contact surface 3 of the contact portion 33d.
3 e is pulled out to a position where it comes into contact with the insertion guide portion 45 of the storage unit 43. In this state, the optical cable 5
The fifth plug 57 is removed from the adapter 59.

Thereafter, as shown in FIG.
Lever portion 33b is lifted upward, and the contact portion 33d
The contact between the printed wiring board 37 and the insertion guide portion 45 is released, and the printed wiring board 37 is pulled out of the storage unit 43. On the other hand, when the printed wiring board 37 is stored in the storage unit 43, as shown in FIG. 8, the printed wiring board 37 is stored along with the insertion guide portion 45.

At this time, the inclined portion 33c of the rotating member 33 is
After coming into contact with the insertion guide portion 45, the inclined portion 33c is rotated according to the shape of the insertion guide portion 45, and
However, the printed wiring board 37 is smoothly stored in the storage unit 43 without being caught in the storage unit 43. In the printed wiring board withdrawal preventing device configured as described above, the fixing member 31 fixed to the printed wiring board 37 is used.
The rotatable member 33 is fixed so as to be rotatable.
3 is formed at the lower end of the printed wiring board 37 in the pull-out direction P, so that the contact portion 33d which is in contact with the storage unit 43 is formed. Can be withdrawn.

Further, since the rotating member 33 is rotatably fixed to the fixing member 31, when the printed wiring board 37 pulled out to a predetermined position is further pulled out, the storage unit of the contact portion 33d can be easily drawn. Release of contact with 43 can be performed. Further, since the inclined portion 33c which is inclined downward in the pull-out direction P is formed on the side of the rotating member 33 opposite to the pull-out direction P of the printed wiring board 37, the printed-wiring board 37 is stored by the inclined portion 33c. Unit 43
When the printed wiring board 37 is stored in the storage unit 43, the rotating member 33 can be rotated in accordance with the shape of the storage unit 43, and the printed wiring board 37 can be smoothly stored in the storage unit 43.

Since the lever portion 33b is formed on the side of the rotating member 33 in the pull-out direction P, the lever portion 33b is formed.
With b, the rotating member 33 can be easily rotated. Further, since the upper regulating portion 31e for regulating the upward rotation of the lever portion 33b is formed on the fixing member 31, the component mounted on the printed wiring board 37 by the contact between the rotating member 33 and the lever portion 33b. Can be reliably prevented.

The fixing member 31 has a lever portion 33b,
Since the lower portion 31f for restricting the downward rotation and movement of the contact portion 33d and the inclined portion 33c is formed, the inner wall surface of the storage unit 43 includes the lever portion 33b, the contact portion 33d, With the inclined portion 33c, it is possible to reliably prevent damage due to rubbing. Then, the fixing member 31 is fixed to the center of the printed wiring board 37 in the pull-out direction P, and the printed wiring board 37 is
About half of the printed circuit board 37, the connector and parts on the printed circuit board 37 are attached or detached, or
Switching such as a switch can be performed.

Further, the rotating member 33 is provided in the storage unit 4.
Since the fixing member 31 is fixed to the printed wiring board 37 so that the printed wiring board 37 does not project from the lower end of the printed wiring board 37 installed and stored in the storage unit 3, the printed wiring board 37 is pulled out to the storage unit 43 and turned by storage. The contact between the moving member 33 and the storage unit 43 can be prevented.

The contact surface 33e is formed on the contact portion 33d, and the contact surface 33e is brought into contact with the insertion guide portion 45. Therefore, the contact of the contact portion 33d with the insertion guide portion 45 is ensured. Can be done. FIGS. 9 and 10 show a second embodiment (corresponding to claims 1 to 6) of a pull-out preventing device for a printed wiring board according to the present invention.

In this embodiment, the storage unit 43
The printed wiring board 37 is stored horizontally, and the fixed member 31 and the rotating member 33 are attached to the printed wiring board 37. The printed wiring board 37 of the fixing member 31
An attachment hole 31a for the fixing member 31 is formed below the fixing member 31.

On both sides of the storage unit 43, an L-shaped bracket 61 for supporting the printed wiring board 37 and a guide rail 4
6 are arranged. Printed wiring board 3 of L-shaped fitting 61
7, a U-shaped concave portion 61a is formed to protrude downward in the pull-out direction P. Then, as shown in FIG. 11, when the printed wiring board 37 is stored in the storage unit 43, the inclined portion 33c of the rotating member 33 comes into contact with the L-shaped bracket 61, and the rotating member 33 is tilted. Is located.

As shown in FIG. 12, when the printed wiring board 37 is pulled out to a predetermined position, the contact portion 33d of the rotating member 33 is pulled out.
Abuts against the recess 61a of the L-shaped bracket 61 to prevent the printed wiring board 37 from being pulled out excessively. In this embodiment, the same effect as in the first embodiment can be obtained.

FIG. 13 shows a third embodiment (corresponding to claim 8) of a pull-out preventing device for a printed wiring board according to the present invention. In this embodiment, a power cutoff switch 63 is attached to the printed wiring board 37, and a lever portion 33b of the rotating member 33 is disposed at a position adjacent to a switch lever 63a of the power cutoff switch 63.

The locking portion 4 is provided at the lower part of the storage unit 43.
3a are formed, and the storage unit 4 of the printed wiring board 37 is formed.
At the time of storage in the third member 3, the contact portion 33d of the rotating member 33 is in contact with the locking portion 43a. On the upper part of the storage unit 43, a detachable lever 51 is attached. Then, when pulling out the printed wiring board 37 from the storage unit 43, first, the lever portion 33b is lifted, and the contact between the contact portion 33d and the locking portion 43a is released.

At the same time, the lever 33b comes into contact with the switch lever 63a of the power cutoff switch 63, and the power cutoff switch 63 is cut off. Then, the connector 5 of the printed wiring board 37 is operated by the lever 33 b and the detachable lever 51.
3 is detached from the connector 49 of the storage unit 43.
In this embodiment, the same effects as those of the first and second embodiments can be obtained. However, in this embodiment,
The lever 33b of the rotating member 33 is connected to the power cutoff switch 6
3 is disposed adjacent to the switch lever 63a, and the power cutoff switch 63 is turned off by turning the lever 33b. For example, after the power supplied to the printed wiring board 37 is cut off, Even when the board 37 must be pulled out of the storage unit 43, the printed wiring board 37 cannot be pulled out unless the power cutoff switch 63 is shut off. Damage can be reliably prevented.

In the first embodiment described above, the example in which the fixing member 31 and the rotating member 33 are formed of stainless steel has been described. However, the present invention is not limited to this embodiment. It may be formed of a resin such as polyacetal.

Further, in the above-described first embodiment, the example in which the fixing member 31 is attached to the center of the printed wiring board 37 has been described. However, the present invention is not limited to this embodiment. The fixing position of the fixing member 31 may be any position at which the contact portion 33d of the rotating member 33 can contact the insertion guide 45. In the first and second embodiments described above, the example in which the contact surface 33e is formed on the side of the drawing direction P of the contact portion 33d has been described, but the present invention is not limited to such an embodiment. For example, a contact projection having a truncated conical shape or a hemispherical shape may be formed.

[0046]

According to the first aspect of the present invention, the pivoting member is rotatably fixed to a fixing member fixed to the printed wiring board, and the pivoting member is pulled out of the printed wiring board. Since the contact portion that contacts the storage unit is formed at the lower end in the direction, the printed wiring board can be reliably pulled out to a predetermined position when the printed wiring board is pulled out from the storage unit.

Further, since the rotating member is rotatably fixed to the fixing member, when the printed wiring board pulled out to a predetermined position is further pulled out, the contact portion easily comes into contact with the storage unit. Can be canceled. According to the printed wiring board pull-out preventing device of the second aspect, the inclined portion that is inclined downward toward the pull-out direction is formed on the rotating member on the side opposite to the pull-out direction of the printed wiring board. When the wiring board is stored in the storage unit, the rotating member can rotate according to the shape of the storage unit, and the printed wiring board can be smoothly stored in the storage unit.

According to the third aspect of the present invention, since the lever portion is formed on the pulling-out side of the rotating member, the rotating member can be easily rotated by the lever portion.

According to the fourth aspect of the present invention, since the fixing member is provided with the upper regulating portion for regulating the upward rotation of the lever portion, the printed member can be printed by contact between the rotating member and the lever portion. Destruction of components mounted on the wiring board can be reliably prevented. In the pull-out preventing device for a printed wiring board according to the fifth aspect, since the fixing member has the lower-side regulating portion for regulating the downward rotation and movement of the lever portion, the abutting portion, and the inclined portion. The inner wall surface can be reliably prevented from being rubbed and damaged by the lever portion, the contact portion, and the inclined portion.

In the printed wiring board withdrawal preventive device according to the sixth aspect, the fixing member is fixed to the center of the printed wiring board in the drawing direction so that the printed wiring board can be pulled out from the storage unit by about half. In a state where the wiring board is half housed in the housing unit, wiring connectors and components on the printed wiring board can be attached and detached, or switches and the like can be switched.

According to the seventh aspect of the present invention, the fixing member is attached to the printed wiring board so that the rotating member does not protrude from the lower end of the printed wiring board standing and stored in the storage unit. Since the printed circuit board is fixed, it is possible to prevent the rotating member and the storage unit from coming into contact with each other due to the draw-out and storage of the printed wiring board into the storage unit. In the printed wiring board pull-out preventing device of the eighth aspect, the fixing member is fixed to the printed wiring board so that the rotating member is adjacent to the power cutoff switch. At the same time, the power supplied to the printed wiring board can be cut off.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of a pull-out preventing device for a printed wiring board according to the present invention.

FIG. 2 is an exploded perspective view of FIG.

FIG. 3 is a perspective view showing a state in which the printed wiring board to which the pull-out preventing device for a printed wiring board is fixed is housed in a housing unit.

FIG. 4 is a sectional view showing a locked state of each member in FIG. 3;

FIG. 5 is a front view showing a contact state of a contact portion in FIG. 4;

FIG. 6 is a cross-sectional view illustrating a state in which a contact portion of a rotating member comes into contact with the storage unit when the printed wiring board is drawn out of the storage unit.

FIG. 7 is a cross-sectional view showing a state in which a lever portion has been moved upward and a printed wiring board has been pulled out of a storage unit.

FIG. 8 is a cross-sectional view showing a state where the printed wiring board is stored in a storage unit.

FIG. 9 is a perspective view showing a second embodiment of the pull-out preventing device for a printed wiring board according to the present invention.

FIG. 10 is a perspective view showing details of a main part of FIG. 9;

FIG. 11 is a cross-sectional view showing a state in which the rotating member is in contact with the L-shaped bracket.

FIG. 12 is a cross-sectional view showing a state in which the contact portion of the rotating member contacts the concave portion of the L-shaped bracket.

FIG. 13 is a third drawing-out preventing device for a printed wiring board according to the present invention.
It is a perspective view which shows embodiment.

FIG. 14 is a perspective view showing a conventional draw-out preventing device for a printed wiring board.

FIG. 15 is a perspective view showing a state in which a printed wiring board to which a conventional printed wiring board pull-out preventing device is fixed is housed in a housing unit.

FIG. 16 is a sectional view of FIG.

FIG. 17 is a cross-sectional view showing a state in which a printed wiring board to which a conventional printed wiring board pull-out preventing device is fixed is pulled out from a storage unit.

FIG. 18 is a cross-sectional view showing a state where a conventional printed wiring board pull-out preventing device and an optical cable are damaged.

[Explanation of symbols]

 31 fixing member 31e upper regulating part 31f lower regulating part 33 rotating member 33b lever part 33c inclined part 33d contact part 37 printed wiring board 43 storage unit 63 power cutoff switch

Claims (8)

[Claims] 1. A printed wiring board pull-out preventing device attached to the printed wiring board for preventing the printed wiring board stored in the storage unit from being excessively pulled out, the fixing being fixed to the printed wiring board. A member rotatably fixed to the fixing member so as to be rotatable in a vertical direction, and a lower end of the rotatable member in a drawing direction side of the printed wiring board contacting the storage unit. A draw-out preventing device for a printed wiring board, wherein a contact portion is formed. 2. The pull-out preventing device for a printed wiring board according to claim 1, wherein an inclined portion that is inclined downward in the pull-out direction is formed on a side of the rotary member opposite to the pull-out direction. A draw-out prevention device for a printed wiring board. 3. The pull-out prevention device for a printed wiring board according to claim 1, wherein a lever portion for rotating the rotating member is formed on the pull-out direction side of the rotating member. A draw-out preventer for a printed wiring board. 4. The pull-out preventing device for a printed wiring board according to claim 3, wherein the fixing member has an upper restricting portion for restricting upward rotation of the lever portion. Pull-out prevention device for printed wiring boards. 5. The pull-out preventing device for a printed wiring board according to claim 3, wherein the fixing member regulates downward rotation of the lever portion and the contact member of the rotating member. A pull-out preventing device for a printed wiring board, wherein a lower-side restricting portion for restricting downward movement of the contact portion and the inclined portion is formed. 6. The pull-out preventing device for a printed wiring board according to claim 1, wherein the fixing member is fixed to a central portion of the printed wiring board in a pull-out direction. Features a draw-out prevention tool for printed wiring boards. 7. The printed wiring board pull-out preventing device according to claim 1, wherein the fixing member fixed to the printed wiring board to be erected and stored in the storage unit. Wherein the pivoting member is fixed at a position where it does not protrude from a lower end of the printed wiring board. 8. The printed wiring board pull-out preventing device according to claim 1, wherein the fixing member fixed to the printed wiring board to be erected and stored in the storage unit. And a power cutoff switch fixed to the printed wiring board is fixed at a position where the power cutoff switch is fixed to the printed wiring board by the rotation of the rotating member.