JPH0347360Y2 - - Google Patents

Description

[Detailed description of the invention] In order to assemble circuit elements such as transistors on a printed circuit board, the present invention fixes the printed circuit board with a chuck means, and
The present invention relates to a printed circuit board fixing device which holds the circuit element with a holding member to prevent the circuit element from falling when the printed circuit board is turned over.

The main object of the present invention is to provide a printed circuit board fixing device that makes it extremely easy to press and hold circuit elements on a printed circuit board.

The configuration of the present invention will be described in detail below based on embodiments shown in the accompanying drawings.

Reference numeral 2 denotes a vise part, in which a support piece 6 is fixedly installed in the lower part of the base body 4 in a perpendicular direction, and a threaded rod 8 is screwed into a screw hole formed in the support piece 6. A flat washer 10 is attached to the upper end of the screw rod 8, and a handle lever 12 is attached to the lower end of the screw rod 8.
A base plate 14 is fixed to the upper part of the base body 4, and the base plate 1
A ball storage portion 16 is formed in 4. 18 is a tightening plate arranged on the base plate 14, and the tightening plate 1
8 is formed with a ball receiving surface 18a. The upper end of a shaft member 20 is fixed to one of the clamping plates 18, and the shaft member 20 is slidably inserted into a hole formed in the base plate 14. Reference numeral 22 denotes a lever, and a nut portion is fixed to one end of the lever, and the nut portion is screwed into a threaded portion formed at the lower portion of the shaft member 20. A hole is provided in the other side of the clamping plate 18, and a screw rod 23 having a head is loosely fitted into the hole, and the screw rod 23 is screwed into a screw hole formed in the base plate 14. . The tightening plate 18 has a coil spring 24,
26 in a direction away from the base plate 14. Reference numeral 28 denotes a spindle, and a sphere 30 is fixedly installed at one end of the spindle.The sphere 30 is rotatably arranged in the ball storage portion 16 of the base plate 14, and the tightening plate 18 is attached to the upper part of the sphere 30. The ball receiving surfaces 18a of the two are in contact with each other. Reference numeral 32 denotes a support stand whose side surface is approximately triangular in shape, and a board 34 is fixedly installed on one side of the support stand.
A screw hole is bored in the center of 4. Reference numeral 36 denotes a support body, and a hole is provided in the approximate center of the side wall portion 36a of the support body, and a bolt 38 is inserted into the hole through a spring washer and a washer. It is screwed into place and fixed. The support body 36 is configured to be rotatable with respect to the plate 34 around a bolt 38. A pair of holes 40 are transparently provided in the plate 34 symmetrically with respect to the screw holes of the plate 34. A pair of holes 42 are bored in a surface of the side wall portion 36a that contacts the board 34, and a steel ball 44 is placed in the holes 42. The steel ball 44 is elastically pushed in the projecting direction by a coil spring disposed in the hole 42, and a part of the circumferential surface of the steel ball 44 is fitted into the hole 40 due to the elastic force of the coil spring. . In this state, the flat plate portion 36b of the support body 36 is set perpendicular to the longitudinal direction of the support shaft 28. Mounting screw holes 46, 48, and 50 are formed in the other two side surfaces and the inclined surface 32a of the support base 32, respectively, and one of the screw holes is formed at the other end of the support shaft 28. The two screws are threaded together. 52 is a holder;
A hole 54 is transparently provided in the horizontal portion of this, and a pair of screw holes 56 are formed in the support body 36 in correspondence with the hole 54. Rising portions 52a and 52b are formed on both sides of the holder 52, and a long hole 58 is formed in each of the rising portions 52a and 52b. The flat plate portion of the holder 52 is connected to the support body 36 through the hole 54 by thumb screws 60 and 62 screwed into the screw hole 56.
It is removably fixed to one side of the. The vicinity of both sides of the shaft body 64 are slidably fitted into the pair of elongated holes 58, and one end of each of substantially U-shaped springs 66, 66a is rotatably connected to both ends of the shaft body 64. There is. Reference numerals 68 and 68a are L-shaped supporting members, and a plastic plate 70 is fixed to the upper part of these supporting members, and a pressing member 72 made of a sponge-like material is fixed to the plate 70. The support member 6
A protruding piece is formed at the other end of each of the protruding pieces 8 and 68a, and a hole formed through the protruding piece is formed in the side wall portion 36 of the support body 36.
It is rotatably fitted into shaft bodies 74 and 76 that protrude from both sides of the lower part of a. The support members 68, 6
Shaft bodies 78, 80 are provided on the inner surface near each other end of 8a.
are provided protrudingly on the shaft bodies 78, 80, and the springs 66,
Each other end of 66a is rotatably connected. A recessed portion is formed in the flat plate portion 36b of the support body 36,
A shallow box-shaped guide member 82 with an open top is disposed in the recess, and the bottom of the guide member 82 is fixed to the support 36 with a screw. Rack guide holes 84 and 86 are provided in both side walls of the guide member 82.
and 88, 90 are provided transparently. The support body 3
Rack guide holes 92, 94, 9 are provided in the portions opposite to the rack guide holes 84, 86, 88, 90 of 6.
6,98 are provided transparently. The rack guide hole 9
A rack 100 is slidably inserted into the rack guide holes 94, 86, and 96, respectively.
A rack 102 is slidably inserted into 90 and 98. A screw hole is formed approximately in the center of the support body 36, and the lower threaded portion of the shaft body 104 is screwed into the screw hole and fixed. The shaft body 104
A pinion 106 is rotatably fitted on the outer peripheral surface of the racks 100 and 10.
It meshes with 2. A hole is provided in the bottom of the guide member 82 approximately at the center thereof, and the pinion 106 is loosely fitted into the hole. Reference numeral 108 denotes a nut member having a knob formed thereon, and the nut member 108 is screwed into a threaded portion 104a formed at the upper part of the shaft body 104. Nut member 108
As shown in FIG. 6, when the nut member 108 is rotated in the direction of rotation of the hour hand, the direction of the thread between the nut member 108 and the threaded portion 104a is adjusted so that the nut member 108 is threaded in the tightening direction relative to the threaded portion 104a of the shaft body 104. It is set. Reference numerals 110 and 112 indicate plate members arranged parallel to each other, one plate member 110 being fixed to the rack 102 and the other plate member 112 being fixed to the rack 100. The plate member 110,
Deep grooves 118 of chuck pieces 114, 116 made of plastic plates are slidably fitted into one portion of each of the chucks 112. Chuck pieces 114, 11
A horizontal V-shaped shallow groove 120 is formed on the mutually opposing side surfaces of 6 over the entire length in the longitudinal direction. The chuck pieces 114 and 116 are provided with the groove 1.
A pin 122 is fixedly installed vertically through pin 18.
22 is slidably inserted into each one of the plate members 110, 112 into a long hole formed therein in a direction perpendicular to the longitudinal direction of each one of the plate members 110, 112. A deep groove 1 in the side surface of each one of the plate members 110, 112 and the chuck pieces 114, 116.
A sponge-like elastic member 1 is provided between the bottom surface of the
24 are arranged. Although the upper end of the pinion 106 is set lower than the upper surface of the racks 102, 100, it may be set higher.

Next, the operation of this embodiment will be explained.

First, the base body 4 is fixed to a workbench using screw rods 8. Next, the support shaft 28 is set at a desired angle, the lever 21 is swung in the tightening direction, the shaft member 20 is pressurized in the downward direction, and the ball receiving surface 18a of the tightening plate 18 is
is crimped onto the sphere 30 to fix the support shaft 28 to the base plate 14.

Next, the printed circuit board 126 is held between the chuck pieces 114 and 116, and the chuck pieces 114 and 1
Adjust the interval of 16. When the plate members 110 and 112 are pressed in the direction toward and away from each other, the rack 10
0,102 move along guide holes 92,84,88,96 and 94,86,90,98. Both sides of the printed circuit board 126 are fitted into the grooves 120 of the chuck pieces 114 and 116, and the nut member 108 is rotated in the tightening direction, that is, in the direction of the hour hand in FIG.
02, the pinion 106 is fixed to the support 36. When the pinion 106 is fixed by pressing the lower end of the nut member 108 against the upper surface of the racks 100 and 102, the rotation of the nut member 108 is transmitted to the racks 100 and 102, causing the racks 100 and 102 to move slightly along the longitudinal direction. Rack 10
Due to this slight movement of 0 and 102, the plate members 110, 1
12 move slightly in the direction of approaching each other, and the plate members 1
10 and 112 are slightly narrowed, the walls of each groove 120 of the chuck pieces 114 and 116 come into elastic contact with both ends of the printed circuit board 126 due to the elasticity of the elastic member 124, and the printed circuit board 126
It is held between the restraint and chuck pieces 114 and 116. The above-mentioned effect can also be obtained by fixing the pinion 106 by pressing the lower end of the nut member 108 onto the upper end surface of the pinion 106.

Next, transistors and other necessary circuit elements are placed on the printed circuit board 126, and their pins are inserted into the through holes of the printed circuit board 126. Next, the support members 68, 68a are manually operated.
5 swings about the shafts 74 and 76 in the direction of rotation of the hour hand in FIG. When the support members 68, 68a are still rotated in the direction of rotation of the hour hand about the shafts 74, 76 while the shaft 64 is in contact with the upper end of the elongated hole 58, the springs 66, 66a are deformed in the compression direction. Due to this deformation, the elastic force of the springs 66, 66a acts on the support members 68, 68a in the counterclockwise direction of rotation of the hour hand in FIG. 5, centering on the shafts 74, 76. Furthermore, when the support members 68, 68a are lowered and the presser member 72 is located near the chuck pieces 114, 116, the rotation axis C connecting the rotation fulcrum A and the sprung support B of the support members 68, 68a , the unsprung fulcrum D moves to the right in FIG. As a result, the elastic force due to compressive deformation of the spring 66 is transferred to the supporting member 6.
8, 68a around the shaft bodies 74, 76, the fifth
As shown in the figure, it acts on the method of rotating the hour hand in the direction of rotation. That is, the pressing member 72 presses the chuck piece 1.
The springs 66,
A spring force conversion point is set at which the direction of the elastic force of the support member 66a relative to the support members 68, 68a changes. When the holding member 72 approaches the printed circuit board 126 beyond the spring force conversion point, the holding member 72 comes into elastic contact with the circuit element on the printed circuit board 126 by the elastic force of the spring 66.

Next, the support body 36 is manually attached to the bolt 38.
When pressure is applied in the direction of rotation around
The support body 36 rotates. The support body 36 is attached to the bolt 38
Rotate 180 degrees around the printed circuit board 12
Turn 6 over. At this time, the steel ball 44 is fitted into the hole 40 of the plate 34 by the spring force, and the support body 36 is locked to the plate 34. Printed circuit board 126 is 180
Even if the printed circuit board 126 is rotated by a certain degree, the circuit elements on the printed circuit board 126 are pressed by the holding member 72.
Never fall.

Next, the pins of each circuit element are soldered to the conductive circuit portion of the printed circuit board 126.

After completing the above work, attach the support 36 to the bolt 3
Rotate 180 degrees around point 8 and return to the original state.
Next, the support members 68, 68a are moved around the shafts 74, 76 in the counterclockwise rotational direction of the hour hand in the direction of rotation of the hour hand.
6, 66a and lift it against the elasticity of the presser member 7.
2 is separated from the printed circuit board 126. At this time, when the spring lower fulcrum D moves to the left of the axis C in FIG. Convert. Place the presser member 72 against the printed circuit board 126 approximately in the counterclockwise direction of rotation of the hour hand in FIG.
After rotating 45 degrees, the springs 66, 66a return to their original shapes, and the supporting members 68, 68 of the springs 66, 66a
The resilient force on 68a is released. Furthermore, when the supporting members 68, 68a are manually swung in the counterclockwise direction of rotation of the hour hand in FIG. 126, the shaft body 64 is locked to the lower end of the elongated hole 58 when it has rotated approximately 90 degrees.

Next, the nut member 108 is rotated in the loosening direction, the racks 100 and 102 are set free, the distance between the chuck pieces 114 and 116 is widened, and the printed circuit board 126 is removed from the chuck pieces 114 and 116. Note that when inspecting a printed circuit board, it is necessary to rotate the support body 36 around the bolt 38 with both sides of the printed circuit board 126 open. In this case, if the holding member 72 is separated from the chuck pieces 114, 116 beyond the spring force conversion point, the supporting members 68, 68a will collide with the support base 32 when the support body 36 rotates. Therefore, in this case, the holder 52 is removed from the support member 36 by loosening the screws 60 and 62, and the lower ends of the support members 68 and 68a are connected to each other.
The holes at the lower ends of the shafts 74 and 74 are widened against the elasticity of
76, and remove the holder 52, support member 68,
68a and the presser member 72 are removed from the support body 36. By removing the holder 52, support members 68, 68a, and presser member 72 from the support 36, the support 36 can be rotated around the bolt 38 with both sides of the printed circuit board 126 open. . In addition, the height of the support body 36 can be adjusted by screwing the threaded portion of the support shaft 28 into the other screw hole 46 or 50 of the support base 32 and changing the fixed position of the support base 32 with respect to the support shaft 28. can do. Note that the base plate 14 is not limited to being fixed to the workbench 12 by the vice 2, but may be stably placed on the workbench.

As mentioned above, the present invention provides a conversion point for the spring force acting on the presser member at an appropriate location on the movement path of the presser member in the direction of contact and separation from the chuck piece, making it easier to hold the circuit elements on the printed circuit board. There are effects that can be done.

[Brief explanation of drawings]

The figures show a preferred embodiment of the present invention, in which Fig. 1 is an external view, Fig. 2 is a front view of the vice, Fig. 3 is a side view, Fig. 4 is a vertical sectional view, and Fig. 5. is a side view, 6th
The figure is a plan view, and FIG. 7 is a front view. 2... Vise part, 4... Base body, 8... Screw rod, 1
4... Base plate, 16... Ball storage section, 18... Tightening plate, 18a... Ball receiving surface, 20... Shaft member, 22
... Screw rod, 28 ... Support shaft, 30 ... Sphere, 32
... Support stand, 34 ... Board, 36 ... Support body, 38
...Bolt, 44...Steel ball, 52...Holder,
52a, 52b... rising portion, 60, 62...
Screw, 64...shaft, 66 spring, 68, 68a...
...Support member, 72...Press member, 74, 76...
Shaft body, 78, 80... Shaft body, 82... Guide member, 104... Shaft body, 106... Pinion, 10
8... Nut member, 110, 112... Plate member,
114, 116...chuck piece, 118...deep groove, 120...shallow groove, 122...pin, 124
...Elastic member.

Claims (1)

[Scope of utility model registration request] a base plate 14; a support 32 attached to the base plate 14; a support 36 rotatably attached to the support 32 about an axis substantially horizontal to the floor; chuck pieces 114, 116 attached to 36 for gripping the printed circuit board;
and support members 68, 68a rotatably supported by the support body 36; Due to the swinging motion, the chuck pieces 114, 11 swing in the direction toward and away from the chuck pieces 114, 116.
6, a holding member 72 for pressing one side of the printed circuit board held by the chuck pieces 114, 116, and a holder 52 provided on the side of the support 36 are used to hold the support members 68, 68a. A long hole 58 formed above the rotation fulcrum A
and an expansion spring 66 whose one end is slidably supported in the long hole 58 and the other end is rotatably supported in the supporting members 68, 68a so as to form a spring force conversion point. A fixing device for printed circuit boards featuring: