JPH0942232A - Mounted structure of member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely prevent screws from dropping off from a member in the condition where the members are removed from another member and to reduce the runout of the screws to small amounts during a mounting operation by providing an interval holding member for securing the interval between the threaded parts of the first and second members, and forming internal thread part both in the first and second members. SOLUTION: To secure a fan mounting plate, i.e., a second member 2, to a power source casing serving as a first member 1, for example, the second member 2 is curved at its end and functions as an interval holding member securing the interval between the internal thread part 11 of the first member 1 and the internal thread part 21 of the second member 2. A triangular projecting part 23 also functions as an interval holding member, preventing the first and second members 1, 2 from being deformed by tightening of screws. By setting the interval holding members so that they are slightly longer than the thread part of a neck-equipped screw 3, a smooth operation can be performed in attaching or removing the second member 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for members used in electronic equipment and the like, and particularly to a member which is detached or replaced during maintenance, inspection or repair of a fan unit of a power source with a fan. The present invention relates to a suitable member mounting structure.

[0002]

2. Description of the Related Art A general member (panel) mounting structure is a structure in which a second member 2 (flat metal plate) is fixed to a first member 1 (housing) with screws 5 as shown in FIG. Are known. With such a structure, the screw 5 may drop from the second member 2 and be lost when the second member 2 is attached and detached. In order to solve this problem, a member mounting structure using a screw with a neck has been proposed.

As a typical prior art of this type, Japanese Utility Model Publication No. 6-28328 (hereinafter referred to as prior art 1) will be described with reference to the drawings.

As shown in FIG. 6, the second member 2 is a surface plate made of a steel plate, the peripheral edges of which are bent, and the upper and lower edges of the second member 2 are held by passing the neck portion of the necked screw 3 into a predetermined neck portion holding portion 21. ing.

Further, a hole smaller than the head portion of the screw with neck 3 through which the screw portion 31 of the screw with neck 3 is inserted (screw diameter is 1.5
Insertion holes 41 of not more than double) are cut, and a metal fitting having a thickness C bent into a Z shape with a step D is welded to the back surface of the second member 2 with the hole portions concentric to each other to form the restraining portion 4. Is forming.

The length E of the threaded portion 31 of the screw with neck 3 is D
It is configured to have a relationship of −C <E <D.
Further, the prior art example 1 discloses an insulating and retaining structure using an insulating bush.

As a result, the neck screw holding structure of the present invention suppresses the swing of the head screw with a simple structure.
It is said that a low-cost necked screw structure that can be easily and surely screwed in and that can also be electrically insulatively attached can be obtained, and the practical effect is great.

[0008]

However, in the invention of the first prior art, since the neck holding portion of the necked screw 3 is merely an insertion hole, the diameter of the threaded portion is necessarily larger than the diameter of the threaded portion, and a means for preventing blurring is provided. It becomes necessary and cannot be a reliable measure to prevent screws from falling off. In particular, there is a possibility that the screw 3 with a neck may fall off from the second member 2 due to vibration or shock during the detaching work of the second member 2 or the transportation of the removed second member 2 or the replacement member. Further, although the structure using the insulating bush can more reliably prevent the screws from falling off, the number of parts and the number of assembling steps increase, which causes a cost increase.

The present invention has been made to solve the above-mentioned problems, and in a member which is attached to another member by a screw and which needs to be detached or replaced, the member is screwed from the member while being detached from the other member. It is possible to provide a member mounting structure that can be reliably prevented from falling off, that the movement of the screw at the time of mounting work can be suppressed to a small extent, and that no special parts are required and that the members can be easily assembled. To aim.

[0010]

A member mounting structure according to the present invention is a member mounting structure for mounting a second member to a first member with a screw having a neck, wherein the first member and the second member are mounted together. Having a spacing member for securing a screw portion spacing with the member,
A female thread portion is formed on both the first member and the second member.

Further preferably, the spacing member is slightly longer than the length of the threaded portion of the screw with a neck.

Further, the first member is a housing of the power supply device, the second member is a rectangular fan mounting plate, and the ends of the sides of the second member are bent to maintain a space. A member is formed, and internal thread portions are formed at the four inner corners of the member.
A triangular protrusion is provided in the vicinity of the inside of the female screw portion to form a second spacing member.

As described above, according to the present invention, since the female screw portion is also formed on the second member, the second member is removed unless the screw with a neck is turned after removing the second member from the first member. The screw with a neck does not fall off.

The inner diameter of the female thread portion of the second member is a value obtained by subtracting the depth of the thread groove from the outer diameter of the thread portion of the neck screw.
Since the outer diameter of the neck portion of the screw with a neck can be set to the same value as or slightly smaller than the inner diameter of the female thread portion of the second member, the deviation of the screw can be suppressed to a small value.

Further, if the spacing member is set to be slightly longer than the length dimension of the threaded portion of the neck screw, the threaded portion of the neck screw is detached from the first member and the second member when the second member is attached and detached. Since it is not screwed into both the female threads at the same time, a smooth detaching work can be performed.

When the dimension of the spacing member is shorter than the length dimension of the threaded portion of the necked screw, the mounting work of the second member is performed with the necked screw screwed into the female thread portion of the second member 2. Therefore, it becomes easy to guide the tip end portion of the necked screw to the female screw portion of the first member.

[0017]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 (a) is a diagram showing a first embodiment of the present invention, and FIG. 1 (b) is a sectional view of the essential parts showing the state of attachment thereof. In FIG. 1, 2 is a second member to which a fan is attached, and 1 is a first member to which the second member 2 is attached.
3 is a screw with a neck for fixing the second member 2 to the first member 1 (power supply housing).

In the second member 2, reference numeral 21 is a female thread portion for preventing the screwed-in neck screw 3 from coming off,
It is formed at the four corners of the second member 2. Reference numeral 22 denotes a bent portion that serves as a spacing member that secures the spacing between the first member 1 and the second member 2, and is configured by bending each side of the second member. Reference numeral 23 is a second gap that secures a gap between the first member 1 and the second member 2 by making a notch in the second member 2 and pushing it out in the mounting direction of the first member 1 and projecting it in a substantially triangular shape. It is a triangular protrusion that serves as a holding member. 24
When attaching the second member 2 to the first member 1
2 is a positioning guide pin that is inserted into the positioning hole of the member 1.

In the first member 1, 11 is a female screw portion for fixing the second member 2 with the screw 3 having a neck, and 12 is a first screw portion with which the bent portion 22 of the second member abuts. Reference numeral 13 is a bent portion of the member, and 13 is a screw with a neck 3 is a female screw portion 1
It is a guide hole into which a positioning guide pin 24 that determines the positions of the first member 1 and the second member 2 is inserted so that it can be smoothly screwed into 1.

In FIG. 1, it is illustrated that the second member 2 (fan mounting plate) is fixed to the first member 1 (power supply housing). The end portion of the second member 2 is bent and functions as a spacing member that secures a spacing between the female screw portion 11 of the first member 1 and the female screw portion 21 of the second member 2. There is. Further, the triangular protrusions 23 also function as spacing members, and prevent the first member 1 and the second member 2 from being deformed by tightening the screws. In addition, as shown in FIG.
If it is set slightly longer than the length of the screw part of
The smooth removal work can be done when removing the parts.

FIG. 2 is a view showing a state in which the necked screw 3 is screwed into the female screw portion 21 of the second member 2.

In FIG. 2, a screw is formed on the second member 2 with a tap or the like, and the necked screw 3 is screwed into the female screw portion 21 of the second member and attached to the second member 2. ing. Here, the inner diameter of the female screw portion 21 of the second member 2 is substantially equal to the diameter of the root of the screw portion 31 of the necked screw 3. Therefore, the diameter of the neck portion of the necked screw 3 can be set to be substantially equal to or slightly smaller than the diameter of the root of the screw portion 31.

As a result, the female screw portion 21 of the second member 2
When the second member is attached after the neck screw 3 is screwed into the neck screw 3, the gap between the hole of the female screw portion 21 and the constricted portion 32 of the neck screw 3 is small, so that the neck screw 3 Shake can be suppressed to a small level.

In FIG. 3, the necked screw 3 is held by being screwed into the female thread portion of the second member 2 and does not come off from the second member 2. When removing the screw 3, it can be removed by turning the screw with neck 3. Also, the necked portion 3 of the screw with neck 3
By making the diameter of 2 substantially equal to the inner diameter of the female threaded portion 21 of the second member 2, a function of preventing blurring is provided.

As described above, the threaded portion 31 of the necked screw 3
By providing the female threaded portion into which both the first member 1 and the second member 2 are screwed in, the second member 2 can prevent the second member 2 from coming off and the shake can be prevented, and the first member 1 can be the second member. Fixing of 2 is realized.

In particular, in the power supply device, the fan is a holding part, and a detaching work occurs at the time of repair or replacement. Desorption work is not always done in the factory or indoors, but is often done outdoors with the power supply installed, and the transportation of the fan mounting plate and the prevention of screw attachment / detachment and blurring during detachment work greatly increase work efficiency. It is an element.

FIG. 4 is a diagram showing a second embodiment of the present invention. In FIG. 4, the dimension of the spacing members 14 and 25 is smaller than the length of the threaded portion of the necked screw 3. With this configuration, the tip of the necked screw 3 can be easily attached to the female threaded portion 11 of the first member 1 while the necked screw 3 is screwed into the female threaded portion 21 of the second member 2. Can be screwed in. This is because when the tip of the screw with neck 3 abuts on the female screw portion 11 of the first member 1, the screw portion 31 of the screw with neck 3 is screwed into the female screw portion 21 of the second member 2. Therefore, the runout is suppressed to a minute, and the tip of the screw with a neck is attached to the first member 1
This is because it is easy to guide the female screw portion 11.

FIG. 5 is a diagram showing a third embodiment of the present invention. In FIG. 5, 2 is a second member (mounting plate) such as a front panel of an electronic device, 1 is a first member (housing) to which the second member 2 is attached, and 3 is a second member. 2 first
It is a screw with a neck for fixing to the member 1. In the second member 2, reference numeral 21 is a female thread portion for preventing the screwed-in neck screw 3 from falling off. In the first member 1, 11 is a female screw portion for fixing the second member 2 by the screw 3 with a neck, and 12 is a housing bent portion with which the second member 2 abuts.

In FIG. 5, fixing the second member 2 to the first member (housing) 1 is illustrated. The end portion of the first member 1 is bent and functions as a spacing member that secures a spacing between the female screw portion 11 of the first member 1 and the female screw portion 21 of the second member 2. There is. Also,
The end portion of the side wall of the first member 1 also functions as a spacing member, and two types of spacing members can be formed with a simple structure, and the second member 2 is prevented from being deformed by tightening the screws. ing.

[0031]

As described above, according to the present invention, the screw with a neck inserted through the female screw portion does not come off unless it is rotated, so that the screw with a neck does not drop from the member, and Easy to manage.
Further, since the diameter of the necked portion 32 of the necked screw can be set to be substantially equal to or slightly smaller than the inner diameter of the female screw portion of the member, it is effective in preventing blurring without using an extra mechanism, There is an effect that the work efficiency of desorption can be improved.

[Brief description of drawings]

FIG. 1 is a diagram specifically showing a first embodiment of the present invention.

FIG. 2 is a partial cross-sectional view of the first embodiment of the present invention.

FIG. 3 is a partial cross-sectional view of the first embodiment of the present invention.

FIG. 4 is a diagram specifically showing a second embodiment of the present invention.

FIG. 5 is a diagram specifically showing a third embodiment of the present invention.

FIG. 6 is a diagram showing a conventional example.

FIG. 7 is a diagram showing a conventional example.

[Explanation of symbols]

 1. First member 2. Second member 3. Neck screw 4. Suppressor 5. Screw 11. First member female thread portion 12. First member bent portion 13. Guide hole 14. Space maintaining member for first member 21. Second member female thread portion 22. Second member bent portion 23. Second member triangular protrusion 24. Second member plate positioning guide 25. Second member spacing member 31. Threaded part of necked screw 32. Constricted part of neck screw 41. Insertion hole 42. Insertion hole

Claims (3)

[Claims] 1. A mounting structure of a member for mounting a second member to a first member with a screw with a neck, wherein a spacing member for securing a threaded portion spacing between the first member and the second member. And a female thread portion formed on both the first member and the second member. 2. The member mounting structure according to claim 1, wherein the spacing member is slightly longer than the length of the threaded portion of the necked screw. 3. The first member is a housing of a power supply device, the second member is a rectangular fan mounting plate, and ends of each side of the second member are bent to maintain a gap. 2. A second gap holding member is configured by forming a member, wherein internal thread portions are formed at four inner corners, and triangular protrusions are provided in the vicinity of the inside of the internal thread portion. The member mounting structure according to item 2.