JPH1013096A - Fixed metal fitting twisting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simultaneously twist fixed metal fittings without enlarging a small cover, by converting a conversion part into the rotation movement of an engagement part with the direct movement of direct driving movement, rotating the engagement part engaged with the fixed metal fittings and twisting the fixed metal fittings. SOLUTION: An air cylinder 7 is driven upward. Thus, a pin holder 8 is also driven upward. Shafts 6A-6B are freely rotatably fitted to a shaft holder 3 and the pin holder 8 is fixed to the air cylinder 7 so that it does not rotate. When the pin holder 8 moves upward, a pin 11 moves upward, the pin 11 is engaged with the rotation section of a cam groove 10 and the shafts 6A-6B rotate in accordance with the form of the rotation section. Since curve comas 5A-5B also rotate, the fixed metal fittings 21A-21B engaged with the grooves of the curve comas 5A-5B are twisted and deformed in accordance with the rotation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing device twisting device, and more particularly to a fixing device twisting device for fixing a cover to a substrate by twisting a fixing device such as a cover attached to the substrate.

[0002]

2. Description of the Related Art Conventionally, a shield cover has been mounted on an element mounted on a substrate to protect the element or to prevent noise from entering a circuit on the substrate. Such a cover is formed by being bent into a U-shaped cross section, and a fixing bracket is attached to an end of the bent portion. Further, a hole is formed in the substrate so as to fit the fixing bracket. Then, the fixing metal of the cover is inserted into the hole to project the fixing metal from the back surface of the substrate, and the cover is fixed to the substrate by twisting the protruding fixing metal so that the fixing metal does not come out of the hole.

FIG. 5 is a partial sectional view showing the structure of a fixing device twisting device for twisting the fixing device. As shown in FIG. 5, the fixing device twisting device includes a fixing device 51A of the cover 50 inserted into a hole (not shown) formed in the substrate 53.
Bending pieces 58A, 58B engaged with the bending pieces 51A, and shafts 56A, 56B connected to the bending pieces 58A, 58B.
Shaft holders 52A and 52B rotatably supporting shafts 56A and 56B, and shafts 56A and 56B
Motors 57A and 57B as drive sources for rotating the motor
Consists of Then, the grooves formed in the bending pieces 58A, 58B are engaged with the fixing members 51A, 51B, and the motors 57A, 57B are driven to rotate the shafts 56A, 56B to simultaneously twist the fixing members 51A, 51B. Thereby, the fixing brackets 51A and 51B do not come off from the substrate 53, and the cover 50 is fixed to the substrate 53.

[0004]

However, in the above-described device for twisting the bracket, a motor for rotating the shaft is provided for each shaft.
The spacing between the shafts could not be reduced, and the bending piece could not be simultaneously engaged with each of the fixing pieces of the small cover with the small spacing between the fixing pieces. As a result, the fixing pieces could not be twisted at the same time. Therefore, to fix the small cover to the board, it is necessary to move the device after twisting one fixture and twist the other fixture, but it takes a long time to fix the cover to the board. However, there is a problem that the manufacturing efficiency is reduced and the size of the apparatus is increased.

Furthermore, since the cover is made of metal, when the fixing bracket is twisted, the direction of the twist of the twisting bracket due to springback returns to the opposite direction, and the groove of the bending piece and the fixing bracket are engaged. Also, there is a problem that it is difficult to remove the fixing bracket from the bending piece.

SUMMARY OF THE INVENTION An object of the present invention is to provide a fixing device twisting device capable of simultaneously turning a fixing device without increasing the size of a small cover. It is another object of the present invention to provide a fixing device twisting device that can easily remove a substrate even after twisting the fixing device.

[0007]

FIG. 1 shows an embodiment of the present invention.
4A and 4B, the invention of claim 1 is a method for twisting the fixing members 21A to 21D of the fixed member 20 protruding from the plurality of through holes of the substrate 23 to thereby fix the fixed member 20 to the substrate. Fixing fittings 21A to 21 which are applied to a fixing fitting twisting device to be fixed to 23 and protrude from through holes.
D and engagement portions 5A to 5D rotatably supported in a direction of twisting the fixtures 21A to 21D, and a linear drive source 7 for reciprocating and linearly driving the substrate 23 from below the substrate 23.
The above-mentioned object is achieved by including the conversion units 6A to 6D, 8, 10, and 11 for converting the linear movement of the linear drive source 7 into the rotational movement of the engagement units 5A to 5D.

[0008] According to a second aspect of the present invention, the conversion section includes an engaging section 5A.
Shafts 6A to 6D extending from the
A cam groove 10 formed at a predetermined angle on the peripheral surface of each of the shafts A to 6D so as to rotate the shafts 6A to 6D, and an engagement pin 1 provided in the linear drive source 7 and engaging with the cam groove 10
It consists of 1. The invention according to claim 3 is that the cam groove 10 rotates the engaging portions 5A to 5D in a predetermined direction, and then rotates the engaging portion 5A.
To 5D are rotated in a direction opposite to the predetermined direction.

According to the first aspect of the present invention, the linear drive unit 7 performs the linear motion, thereby converting the conversion units 6A to 6D, 8, 1.
0, 11 converts this rectilinear movement into a rotational movement of the engaging parts 5A to 5D, whereby the engaging parts 5A to 5D engaging with the fixing parts 21A to 21D rotate to fix the fixing parts 21A to 21D.
Is twisted. According to the invention of claim 2, the linear drive source 7
Performs the linear motion, so that the engagement pin 11
0, the shafts 6A to 6D and the engaging portions 5A to 5D rotate to twist the fixtures 21A to 21D. According to the invention of claim 3, the fixing brackets 21A-
Engaging portions 5A to 5D rotated in a predetermined direction to twist 21D
Rotates in a direction opposite to the predetermined direction thereafter.

In the section of the means for solving the above-mentioned problems, which explains the configuration of the present invention, the drawings of the embodiments of the present invention are used for easy understanding of the present invention. However, the present invention is not limited to this.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partial cross-sectional side view showing a configuration of a fixture twisting device according to an embodiment of the present invention,
FIG. 2 is a plan view showing the structure of the above-described fixing metal twisting device, and FIG. 3 is a perspective view showing the structure of the cover. In this embodiment, in order to fix the cover 20 shown in FIG. 3 for protecting the elements attached to the circuit board on the circuit board, the four fixing fittings 2 of the cover 20 are provided.
An apparatus for simultaneously twisting 1A to 21D will be described.

As shown in FIGS. 1 and 2, a fixing device twisting device 1 according to the present embodiment comprises a holder 2, a shaft holder 3, and a support shaft projecting upward from four corners of the shaft holder 3. 4A to 4D and a fixing bracket 21 for the cover 20
Shafts 6A to 6D (only 6A and 6B are shown) having bending pieces 5A to 5D engaged with A to 21D, an air cylinder 7 fixed to the bottom of the holder 2 and moving straight upward, and an air cylinder 7 And a pin holder 8 attached to the tip of the. Holes 8A to 8D in pin holder 8
(Only 8A and 8B are shown).
Shafts 6A to 6D are slidably inserted into .about.8D.
Reference pins 12A to 12D for positioning the substrate 23 are formed on the support shafts 4A to 4D.

The shafts 6A to 6D are rotatably attached to the shaft holder 3 by nuts 9A to 9D. Further, a cam groove 10 is formed on a peripheral surface of the shafts 6A to 6D facing upward from lower ends. Hole 8 in pin holder 8
Pins 11 protruding into A to 8D are attached,
The pin 11 is engaged with a cam groove 10 formed on the shafts 6A to 6D.

FIG. 4 shows the shape of the cam groove 10. As shown in FIG. 4, the cam groove includes, in order from the air cylinder 7, a straight section AB, a rotation section BC, and a reverse rotation section CD shorter than the rotation section BC. Then, the pin 11 moves straight section AB
Are engaged, the shafts 6A to 6D do not rotate, and when engaged with the rotation section BC, the shafts 6A to 6D do not rotate.
A to 6D rotate, and when engaged with the reverse rotation section CD, the shafts 6A to 6D rotate in the direction opposite to the rotation section BC.

Next, the operation of the fixing device twisting apparatus 1 according to the present embodiment will be described. First, the substrate 23 is placed on the support shafts 4A to 4D, and a pin hole (not shown) formed in the substrate 23 is engaged with the reference pins 12A to 12D to perform the positioning of the substrate 23. Next, the cover 20 is positioned on a cover mounting hole (not shown) formed in the substrate 23 by a robot (not shown) or the like, and the cover 2
0 is inserted into the cover mounting hole. As a result, the fixtures 21 </ b> A to 21 </ b> D penetrate the substrate 23 and protrude from the lower surface of the substrate 23. Here, since the bending pieces 5A to 5D are positioned so as to correspond to the cover mounting holes, the fixing pieces 21A to 21A to
21D engages with grooves formed in the bending pieces 5A to 5D.

Next, the air cylinder 7 is driven upward. Accordingly, the pin holder 8 is also driven upward. Here, the shafts 6A to 6D are rotatably mounted on the shaft holder 3.
, And the pin holder 8 is fixed to the air cylinder 7 so as not to rotate. Therefore, when the pin holder 8 moves upward, the pin 11 also moves upward, thereby rotating the cam groove 10. The shafts 6A to 6D are engaged with the section BC and according to the shape of the rotation section BC.
Rotates. Accordingly, since the bending pieces 5A to 5D also rotate, the fixtures 21A to 21D engaged with the grooves of the bending pieces 5A to 5D are twisted and deformed according to the rotation. When the fixing brackets 21A to 21D are twisted, the cover 2
0 does not come off from the substrate 23,
Is fixed to the substrate 23.

On the other hand, the shape of the cam groove 10 is the reverse rotation section C
D, the shafts 6A to 6D are shaped so as to rotate in the opposite direction.
Reaches the reverse rotation section CD, the shafts 6A to 6D slightly rotate in the direction opposite to that before. As a result, even if springback occurs due to twisting of the fixtures 21A to 21D, the shafts 6A to 6D rotate in the opposite direction by the amount of the springback.
The grooves 1A to 21D do not engage with the grooves in the bending pieces 5A to 5D, and the substrate 23 can be easily removed.

After removing the substrate 23, the pin holder 8 is moved to the initial position before the substrate 23 is mounted while the air cylinder 7 is driven downward to rotate the shafts 6A to 6D, thereby completing the processing. Then, the next substrate 23 is placed on the support shafts 4A to 4D, the cover 20 is attached, and the fixing brackets 21A to 21D are twisted in the same manner as described above.

As described above, in the present embodiment, the fixtures 21A to 21D of the cover 20 attached to the substrate 23 are twisted only by moving the air cylinder 7 upward, so that a plurality of drive sources are not provided. The structure of the twist device can be simplified. Also,
Since only the air cylinder 7 is required as the driving source, the shafts 6A to 6A-6
The interval of D can be reduced. Therefore, even if the interval between the fixing brackets 21A to 21D of the cover 20 is small,
The fixtures 21A to 21D can be simultaneously twisted.

Further, as shown in FIG. 4, the shape of the cam groove 10 is increased as the air cylinder 7 is raised.
Since the shafts 6A to 6D are rotated slightly in the opposite direction after the twisting is completed while the shafts 21D are rotated in the twisting direction, the fixing brackets 2A and 21D are rotated by the springback caused by being twisted.
The engagement between the grooves 1A to 21D and the grooves of the bending pieces 5A to 5D is prevented. Therefore, the substrate 23 can be easily removed from the support shafts 4A to 4D.

In the above-described embodiment, an example has been described in which the cover 20 to which the four fixtures 21A to 21D are attached is attached to the substrate 23. However, any number of fixtures may be used. The number and pitch of the shafts may be changed according to the number and pitch of the shafts.

Further, in the above embodiment, the reverse rotation section CD is formed in the cam groove 10 so that the air cylinder 7 is raised to rotate the shafts 6A to 6D in the reverse direction. By lowering the air cylinder 7 without providing the reverse rotation section CD, the shafts 6A to 6D can be rotated in the reverse direction. In this case, the shape of the cam groove 10 is only the straight section AB and the rotation section BC.

In the correspondence between the above-described embodiment and the claims, the cover 20 is a member to be fixed, the air cylinder 7 is a linear drive source, the bending pieces 5A to 5D are engagement portions, and the shaft 6
A to 6D, the pin holder 8, the cam groove 10, and the pin 11 constitute a conversion unit.

[0024]

As described above in detail, according to the first aspect of the present invention, since the fixing bracket of the fixed member attached to the substrate is twisted only by driving the rectilinear driving source straightly, a plurality of driving sources are provided. The twist device is not provided, and the configuration of the twist device can be simplified. Further, since only a straight drive source is required as the drive source, the distance between the engagement portions can be reduced as compared with a configuration in which a drive source is provided for each engagement portion. Therefore, even if the interval between the fixing members of the fixed member is small, the fixing members can be simultaneously twisted.

According to the third aspect of the present invention, since the cam groove is formed so as to rotate the engaging portion in a predetermined direction and then in the opposite direction, the fixing bracket is formed by springback caused by twisting the fixing bracket. And the groove of the engaging portion are prevented from meshing with each other, and the substrate on which the fixing bracket has been twisted can be easily removed from the apparatus.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional side view showing a configuration of a fixture twisting device according to an embodiment of the present invention.

FIG. 2 is a plan view showing a configuration of a fixing device twisting device according to the embodiment of the present invention.

FIG. 3 is a perspective view showing a configuration of a cover.

FIG. 4 is a development view of a cam groove.

FIG. 5 is a partial cross-sectional side view showing a configuration of a conventional fixing fitting twisting device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixing tool twisting device 2 Holder 3 Shaft holder 4A-4D Support shaft 5A-5D Bending piece 6A-6D Shaft 7 Air cylinder 8 Pin holder 10 Cam groove 11 Pin 20 Cover 21A-21D Fixing fixture 23 Substrate

Claims (3)

[Claims] 1. A fixing device twisting device for fixing a fixed member to the substrate by twisting a fixing member of the fixed member projecting from each of the plurality of through holes of the substrate, wherein An engaging portion that is engaged with the fixture and is rotatably supported in a direction in which the fixture is twisted; a linear drive source that reciprocates linearly from below the substrate toward the substrate; A conversion part for converting the movement into a rotational movement of the engagement part. A shaft extending from the engaging portion, a cam groove formed on a peripheral surface of the shaft at a predetermined angle so as to rotate the shaft, and 2. The fixing device twisting device according to claim 1, further comprising an engaging pin provided in the linear drive source and engaging with the cam groove. 3. The cam groove is formed to rotate the engaging portion in a direction opposite to the predetermined direction after rotating the engaging portion in a predetermined direction. 2
The fixing fitting twisting device according to the above.