JPS634806Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention involves inserting a fixture, particularly the case of various electrical appliances, into an opening in a panel, and tightening the periphery of the opening with the protruding part of the case. This relates to a fixture for attaching a case to a panel by clamping it with screws.

[Conventional technology]

Conventional mounts have a structure that uses the tightening force of the screws to hold the case as the object to be attached to the panel, but if the screws are tightened too strongly, the case may be deformed or damaged, and the equipment stored inside the case may be damaged. This had the disadvantage of having a negative impact on

Therefore, in order to eliminate the above-mentioned disadvantages, a mounting device (Utility Model Application No. 157011/1983) was proposed which was constructed so as not to apply more than necessary tightening force to the case.

[Problem that the invention attempts to solve]

However, in the conventional mounting tool shown in Utility Model Application Publication No. 58-157011, the structure of the nut, which is the main component with a groove formed in the axial direction on the outer peripheral surface of the large diameter part, is complicated, so the nut is molded. They had to be manufactured by molding, and since molded products lacked strength, there was a problem that they had to be made larger in order to increase the wall thickness.

This invention was made in order to solve the above-mentioned problems, and the purpose is to obtain a fixture that is easy to manufacture, small in size, and robust.

[Means for solving problems]

The fixture according to this invention includes a fixing member made of a metal plate, a square nut whose rotation is prevented by the nut receiving part of the fixing member and can be moved in the axial direction, and a fixing member that is screwed onto the square nut, and has a tip and an attached object. It consists of a tightening screw that clamps the panel with the protruding part of the spring, and a spring that is disposed between the square nut and the spring receiving part of the fixing member.

[Effect]

In this device, when the tightening screw is rotated in a predetermined direction, the protrusion of the object to be attached and the tip of the tightening screw come into contact with the panel, and then the square nut compresses the spring in the axial direction. By retreating and detaching from the nut receiver, the panel is clamped between the protrusion and the tightening screw with a constant clamping force.

Then, by rotating the tightening screw in the opposite direction to that described above, the clamping force that clamps the panel can be released.

〔Example〕

An embodiment of this invention will be described below with reference to the drawings.

FIG. 1 is a plan view showing a state in which an object is attached to a panel using a fixture according to an embodiment of the invention;
FIG. 2 is a sectional view taken along the - line in FIG. 1.

A case 1 as an object to be mounted has a box shape with one end open, and can be inserted into a mounting opening 4 formed in a panel 2 until a projection 3 formed on the outer periphery of the opening abuts against the panel 2.

As shown in FIG. 4, a plurality of elongated holes 5 (four in the illustrated example) are bored in two opposing surfaces of the case 1 (upper and lower surfaces in the illustrated example). The engaging claw 7 of the fixing member 6 is inserted into the elongated hole 5.

The fixing member 6 is made by punching out a metal plate into the shape shown in FIG.
From positions t ₁ to _{t 4} , fold it at a substantially right angle to the front side of the paper.

Next, the portions 6e and 6f are bent at a substantially right angle toward the front side of the paper from the bending lines _t5 and _t6 in the same way as the portions 6a to 6d.

In this way, each portion 6a to 6f is connected to each bending line t ₁ to
By bending at t ₆ , the fixing member 6 can be manufactured, where the part 6a becomes the posture holding part 9 of the tightening screw 8, the part 6b becomes the nut receiving part 10, and the part 6
C becomes the spring receiving part 11, part 6d becomes the stopper 13 that prevents the rectangular nut 12 from moving forward, and parts 6g to 6j become the engaging claws 7.

The square nut 12 is fitted into a square hole 14 made in the nut receiving part 10 to prevent rotation, and a coil spring 15 is inserted between the spring receiving part 11 and the square nut 12.
is installed.

Then, the tightening screw 8 inserted into the hole 16 drilled in the spring receiving part 11 is passed through the coil spring 15 and the washer 19 and screwed into the square nut 12.
The tip part is inserted into the hole 17 made in the posture holding part 9 and assembled.

The pressing member 18, which is pressed by the tightening screw 8 and clamps the panel 2 between it and the protrusion 3 of the case 1, is a metal strip having a width W narrower than the width interval W of the engaging claw 7 (FIG. 3). It is made by bending one end of the plate at a substantially right angle, and the bent part is used as the pressure receiving part 18a of the tightening screw 8.
That is.

Next, the operation will be explained.

Note that the case 1 is attached to the panel 2 on two opposing sides using fixtures, but since each side has the same configuration, only one side (the top side) is shown in the drawing.

First, the case 1 is inserted into the mounting opening 4 of the panel 2, the pressing member 18 is arranged on the surface of the case 1 in which the elongated hole 5 is formed, and the tightening screw 8, square nut 12, coil spring 15 is , the fixing member 6 with the washer 19 assembled thereon is placed on top of the pressing member 18, and the engaging claw 7 of the fixing member 6 is inserted into the elongated hole 5.

In the above state, when the tightening screw 8 is rotated in a predetermined direction, since the rotation of the square nut 12 is prevented by the square hole 14, the tightening screw 8 advances in the axial direction and the protrusion 3, The pressure receiving portion 18a is brought into contact with the panel 2.

Then, when the tightening screw 8 is further rotated in a predetermined direction, the square nut 12 moves in the direction of the coil spring 15 (backward) because the tightening screw 8 cannot move forward.
Therefore, the compressive force applied to the coil spring 15 moves (retreats) the fixing member 6 via the spring receiving part 11, presses the leg part 7a of the engagement claw 7 against the hole edge of the elongated hole 5, and moves the fixing member 6 through the spring receiving part 11. can be fixed to case 1.

In the above state, when the tightening screw 8 is further rotated in a predetermined direction, the square nut 12 retreats while compressing the coil spring 15, and a clamping force (which clamps the panel 2 between the protruding part 3 and the pressure receiving part 18a) is generated. Gradually increase the pressure (pressure force).

Then, when the square nut 12 comes off from the nut receiving part 10, the square nut 12 rotates integrally with the tightening screw 8, and the clamping force cannot be further increased, and the tightening is completed.

In addition, the length of the square nut 12, the coil spring 15
By appropriately selecting the spring constant, it is possible to obtain the desired pressing force in the tightened state.

Further, even if the square nut 12 is detached from the nut receiving part 10, the tip of the tightening screw 8 is attached to the posture holding part 9.
Since the screw 8 passes through the hole 17, the tightening screw 8 does not tilt.

Furthermore, since both end surfaces of the square nut 12 protrude in a spherical shape, when the square nut 12 rotates integrally with the tightening screw 8, it makes point or line contact with the spring receiver 11 and the washer 19. , the square nut 12, that is, the tightening screw 8, can be easily rotated idly.

When the tightening screw 8 is rotated in the opposite direction to that described above in the above-mentioned tightened state, the square nut 12 rotates integrally with the tightening screw 8, but the nut holder is always held by the elastic restoring force of the coil spring 15. Since the square nut 12 is pressed in the direction of the section 10, when the square hole 14 and the opposing posture match, the square nut 12 fits into the square hole 14 and rotation is restricted.

As the tightening screw 8 rotates, the square nut 12 moves (advances) in a direction that releases the compression of the coil spring 15.

In addition, in the above embodiment, the panel 2 and the tightening screw 8
The pressure receiving part 18a of the pressing member 18 is interposed between the two to disperse the pressing force of the tightening screw 8 over a wide area of the panel 2, making it difficult to damage the panel 2, and preventing warping of the tightening screw 8. However, excluding the pressing member 18, the tightening screw 8 is directly connected to the panel 2.
A similar effect can be obtained by bringing it into contact with.

[Effect of idea]

As described above, according to this invention, the fixing member, which is the main part, is manufactured by punching and bending a metal plate, making it easy to manufacture.

Furthermore, since a square nut is used as the nut to be screwed into the tightening screw, a square hole in a nut receiving portion serving as a rotation prevention mechanism for the square nut can be easily formed, and the square nut can be manufactured at low cost using a square drawing machine.

Furthermore, by rotating the tightening screw until the square nut becomes idle, the object to be attached can be attached to the panel with the desired clamping force (tightening force), making the attachment both compact and robust. It has excellent effects.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a state in which an object is attached to a panel using a fixture according to an embodiment of the invention;
Figure 2 is a sectional view taken along the - line in Figure 1, Figure 3 is a sectional view taken along the - line in Figure 2, and Figure 4 is a sectional view taken along the - line in Figure 1.
FIG. 5 is an exploded perspective view of the fixture shown in the figure, and FIG. 5 is a developed view of the fixing member. In the figure, 1 is a case, 2 is a panel, 3 is a protrusion, 5 is an elongated hole, 6 is a fixing member, 7 is an engaging claw, and 8
is a tightening screw, 9 is a posture holding part, 10 is a nut receiving part, 11 is a spring receiving part, 12 is a square nut, 13
is a stopper, 14 is a square hole, 15 is a coil spring, 1
6 and 17 indicate holes.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An engaging pawl that engages with an elongated hole formed in an object to be attached by punching and bending a metal plate, a posture holding part, a nut receiving part, and , a fixing member integrally formed with a spring receiving part and a stopper; rotation is prevented by a square hole drilled in the nut receiving part and movable in the axial direction; forward movement is prevented by the stopper and backward movement is prevented; a square nut that is removed from the square hole, passes through a hole drilled in the spring receiver, is screwed with the square nut, passes through a hole drilled in the posture holding section, and connects the tip and the mounted object. A mounting tool comprising: a tightening screw that clamps a panel with a protrusion of an object; and a spring that the tightening screw passes through and is disposed between the spring receiver and the square nut. (2) The square nut is characterized in that both end surfaces protrude in a spherical shape.Claim 1 of the utility model registration
Mounting hardware listed in section.