CN110831329B

CN110831329B - PCB frame clamp type bracket and method for bearing PCB by using same

Info

Publication number: CN110831329B
Application number: CN201810908944.7A
Authority: CN
Inventors: 余四从
Original assignee: ASIA NEO TECH INDUSTRIAL CO LTD
Current assignee: ASIA NEO TECH INDUSTRIAL CO LTD
Priority date: 2018-08-10
Filing date: 2018-08-10
Publication date: 2022-12-09
Anticipated expiration: 2038-08-10
Also published as: CN110831329A

Abstract

The invention provides a PCB frame-clamped bracket, which comprises two clamping arms which are symmetrically arranged on two sides of a cross rod and can oppositely and reversely rotate and swing, wherein a span part is respectively and symmetrically formed on the two clamping arms, a PCB accommodating groove is formed between the two span parts and the cross rod in a frame surrounding manner, the PCB accommodating groove is provided with a PCB placing opening relatively far away from the cross rod, and two elastic force driving elements are symmetrically arranged on the two clamping arms and used for driving the two clamping arms to oppositely rotate and swing and clamp the PCB placing opening. The invention also provides a method for bearing the PCB by using the bracket, so that the problem that the baking capacity of the PCB is influenced by increasing the distance between the traditional PCB and other PCBs in the moving baking process is solved.

Description

PCB frame clamp type bracket and method for bearing PCB by using same

Technical Field

The present invention relates to a structure technology of a clamp for a PCB, and more particularly, to a PCB frame clamp type bracket and a method for supporting a PCB using the same.

Background

Printed circuit boards (PCBs for short) are usually subjected to processes such as ink coating, drying, baking, and cleaning during the manufacturing process, and usually utilize a conveying apparatus to carry PCBs one by one through the above-mentioned processes, so as to improve the productivity.

In PCB conveying equipment, it is often seen that a clamp is used to clamp the end edge of a PCB, so that the PCB is clamped by the clamp in a suspended manner, and the clamp is moved by a movable element such as a conveying chain or belt, thereby carrying the suspended PCB to move on a production line through a work station of the above process.

Taking the existing PCB baking equipment as an example, the PCB is carried into a tunnel type oven by adopting a continuous movable mode to carry out baking operation; for this purpose, it is common to use a conveyor line capable of moving in a loop, and arrange clamps (for example, taiwan patent I225029) on the conveyor line at intervals, and use the clamps to clamp a frame part of the PCB that is not covered with ink, so that one piece of PCB can be clamped by the clamps at intervals, and enter the oven to be baked while moving in a hanging manner at intervals on the conveyor line.

In addition, the PCB is generally a rectangular thin plate, and the area specification (i.e. the length and width) of the thin plate is divided into large and small ones and the thickness of the thin plate is divided into small and large ones. When the clamp is used for vertically carrying the PCB to pass through the oven in the moving process, the clamped PCB is easy to shake, and the shaking phenomenon of the thinner PCB is more obvious.

Therefore, manufacturers usually increase the distance between the hanging clamps on the PCB conveying line in the oven to prevent the clamped PCB from being stained with ink due to shaking during the moving and baking process. When the distance between the hanging clamps arranged on the board conveying line in the oven is longer, the number of the pieces capable of hanging the PCB to be baked in the oven in unit time is relatively restricted, and the baking capacity of the PCB is hindered.

Disclosure of Invention

In view of the above, the present invention is directed to improve the problem that the distance between the hanging clamps on the board conveying line in the oven is increased to further affect the baking productivity of the PCB, in order to avoid the defects of ink sticking and the like caused by shaking in the moving baking process of the conventional PCB.

To this end, the present invention discloses a preferred embodiment of a PCB framing jig bracket, particularly for carrying PCBs having a thickness of 0.8mm to 5.0 mm; the major structure characteristic of this frame clamp formula bracket includes: a cross bar; two clamping arms which are symmetrically arranged on both sides of the cross rod in a manner of relatively rotating and swinging reversely, so that the cross rod is positioned between the two clamping arms, a span part is symmetrically formed on each of the two clamping arms, a PCB accommodating groove is formed between the two span parts and the cross rod in a surrounding manner, and the PCB accommodating groove is provided with a PCB inlet relatively far away from the cross rod; and two elastic force driving elements which are symmetrically arranged on the two clamping arms and drive the two clamping arms to oppositely rotate and swing to clamp the PCB placing inlet.

In a further implementation, at least one blocking part is convexly arranged at the middle section of the cross rod, and the PCB accommodating groove frame is formed between the two spanning parts and the blocking part of the cross rod in a surrounding manner.

In a further implementation, two sides of the cross bar are respectively provided with a vertical rod in a protruding manner, the two clamping arms are respectively and symmetrically formed with a pivoting portion, and the two clamping arms are respectively and symmetrically configured on the vertical rod through the pivoting portions and further pivot on the two sides of the cross bar in a manner of being capable of swinging oppositely and rotatably. The two elastic force driving elements are torsion springs respectively arranged on the two pivoting parts, each torsion spring is provided with a first spring foot and a second spring foot, the first spring foot presses and contacts the clamping arm, and the second spring foot presses and contacts the vertical rod.

In a further implementation, the PCB clamping device further comprises two pushers symmetrically arranged at one fixed end outside the two clamping arms, and the two pushers respectively drive the two clamping arms to elastically open the PCB placing port.

In a further embodiment, the two clamping arms respectively have a first end and a second end, the bridge portion is formed at the first end, the two pushers respectively press-contact to drive and release the second end, and the pivot portion is located between the first end and the second end.

In a further embodiment, the cross bar spans a double-sided, rotatable conveyor chain inside an oven. Wherein the bracket is driven by the conveying chain to pass through a picking end and an unloading end.

In a further implementation, the thickness of the PCB is between 0.8mm and 5.0 mm.

In addition, the invention also provides a method for bearing the PCB by using the bracket, which comprises the following steps: constructing a polygonal bracket, wherein the polygonal bracket comprises at least one cross rod connected with two movable side rods to form a frame, so that a PCB accommodating groove with a surface area space and a PCB accommodating opening formed at the end edge of the PCB accommodating groove are formed in the polygonal bracket; and then executing a PCB picking step, comprising: driving the two movable side rods to open the PCB entry port in a relatively reverse rotation and swing mode, and controlling the size of the PCB entry port and the area of the PCB accommodating groove; putting a quadrilateral PCB into the PCB accommodating groove, then driving the two movable side rods to clamp and contract the PCB accommodating opening in a relatively reverse rotary swinging mode, and clamping and supporting the PCB in the PCB accommodating groove; the two movable side rods clamp and support two opposite end edges of the PCB in a force application mode of the inclined arms, and at least one end edge between the two opposite end edges of the PCB is supported on the at least one fixed side rod.

In a further embodiment, the two movable side bars are pivotally connected to the at least one cross bar, respectively.

In a further implementation, the two movable side rods are respectively driven by an elastic force to clamp the PCB placing opening.

In a further embodiment, the two movable side rods are driven by a pusher to open the PCB entry.

In a further embodiment, the method further comprises a step of carrying the PCB, wherein the at least one cross bar is connected across a double-side rotatable conveyor chain inside the oven so as to carry the PCB on the bracket into the oven for baking or drying.

In a further implementation, the method further comprises a step of unloading the PCB, wherein the two movable side rods are driven to open the PCB placing opening in a relatively reverse rotation and swing mode, and then the PCB on the bracket is unloaded onto a conveying belt.

According to the technical means, the invention has the technical effects that:

1. the space size of the PCB entrance and the PCB containing groove can be conveniently controlled by utilizing the relative reverse rotation and swing function of the double clamping arms (or called movable side rods), thereby being convenient for carrying PCBs with different surface area specifications.

2. The bracket is used for fixing a plurality of end edges of the quadrilateral PCB, so that the PCB can be prevented from shaking in the moving baking process, the distance between the PCB and other PCBs in the moving baking process can be further reduced, and the baking capacity of the PCB can be effectively improved.

The features and technical effects of the embodiments disclosed herein will be presented in the following description and drawings.

Drawings

FIG. 1 is an exploded perspective view of a PCB framing jig bracket of the present invention;

FIG. 2 is a perspective assembly view of FIG. 1;

FIG. 3 is a front view of FIG. 2;

FIG. 4a is an enlarged schematic view of the stop of FIG. 2;

FIG. 4b is an enlarged schematic view of the midspan portion of FIG. 2;

FIG. 4c is an enlarged partial cross-sectional view of FIG. 3;

FIG. 5 is a cross-sectional view of the PCB framing jig bracket of the present invention disposed within the oven interior;

FIG. 6 is a side view of FIG. 3;

FIGS. 7a to 7h are schematic diagrams of the operation of FIG. 5;

fig. 8 is a flowchart illustrating the steps of a method of loading a PCB with a cradle according to the present invention.

Description of reference numerals: 10-a bracket; 101-a PCB receiving slot; 102-PCB entrance; 11-a cross-bar; 111-stop; 112-notch; 12-a clamp arm; 121-a first end portion; 122-a second end; 123-a pivot joint; 124-span part; 125-opening; 13-erecting a rod; 14-a baffle; 15-axle pin; 16-a resilient force-driving element; 161-a first spring foot; 162-a second spring foot; 17. 17a, 17 b-pusher; 20-oven; 30-a conveying chain; 301-a capture end; 302-unload end; 40-a rolling wheel; 50-a conveyor belt; 60-PCB; 601. 603-end edge; 602. 604-opposite end edges; s1 to S4-description of the procedure of the example.

Detailed Description

The invention aims at the PCB with the thickness of 0.8-5.0 mm, and a carrier in a bracket form is very suitable for carrying the PCB to move so as to replace the traditional hanging type clamp and avoid the PCB from shaking in the carrying process. Referring to fig. 1 to 3, a PCB clip type bracket 10 according to a preferred embodiment of the present invention is disclosed, which includes a cross bar 11, two clip arms 12 and two elastic force driving elements 16, wherein:

at least one plate-shaped blocking portion 111 for supporting the PCB is protruded from the middle section of the cross bar 11. The two clamping arms 12 are symmetrically disposed on both sides of the cross bar 11, so that the blocking portion 111 is located between the two clamping arms 12. Further, the two clip arms 12 respectively and symmetrically form a span portion 124 for clamping a PCB, a PCB60 accommodating groove 101 is formed between the two span portions 124 and the blocking portion 111, the PCB accommodating groove 101 has a PCB entrance 102 relatively far away from the blocking portion 111, so that the PCB60 can enter and exit the PCB accommodating groove 101 through the PCB entrance 102. More specifically, the blocking portion 111 has a V-shaped notch 112 (as shown in fig. 4 a), and the blocking portion 111 holds the PCB60 through the notch 112; the two spans 124 each have a V-shaped opening 125 (as shown in fig. 4 b), and the two spans 124 hold the PCB60 through the openings 125.

Two sides of the cross bar 11 are respectively protruded with an upright rod 13, the two clamping arms 12 are respectively symmetrically formed with a pivot portion 123, the clamping arms 12 are pivotally connected to the upright rod 13 by a pivot pin 15 penetrating between the pivot portion 123 and the upright rod 13, the two clamping arms 12 are respectively symmetrically disposed on the upright rod 13 through the pivot portion 123, and are pivotally connected to two sides of the cross bar 11 in a manner of being capable of swinging reversely. Further, the two clamping arms 12 respectively have a first end 121 and a second end 122, the span portion 124 is formed at the first end 121, and the pivot portion 123 is located between the first end 121 and the second end 122.

Referring to fig. 1 and fig. 4c, it is illustrated that the two elastic force driving elements 16 are symmetrically disposed on the two clipping arms 12, and the two elastic force driving elements 16 are used for driving the two clipping arms 12 to clip the PCB entry 102 in a relatively reverse swinging manner. Further, the two elastic force driving elements 16 are implemented as torsion springs respectively disposed on the two pivoting portions 123, and each of the two torsion springs has a first spring leg 161 and a second spring leg 162, wherein the first spring leg 161 presses the second end portion 122 of the clip arm 12, and the second spring leg 162 presses the vertical rod 13, so that the first end portions 121 of the clip arms 12 are driven by the two elastic force driving elements 16 to swing in a relatively close direction, respectively, thereby clamping the PCB entry port 102. Furthermore, the upright 13 is provided with a baffle 14, and the baffle 14 is located on the path of the first end 121 swinging in the relatively close direction to restrict the angle of the first end 121 swinging in the relatively close direction, so as to avoid the interference phenomenon when the first ends 121 of the two clamping arms 12 swing in the relatively close direction.

Referring to fig. 5, it is illustrated that the PCB frame clip type bracket 10 of the present invention further includes two pushers 17, the two pushers 17 are symmetrically disposed at a fixed end (not shown) outside the two clip arms 12, and the two pushers 17 can respectively drive the two clip arms 12 to elastically open the PCB entry 102. The pusher 17 may be a pneumatic cylinder in practice. Further, the two pushers 17 can respectively press the second end portion 122, and when the pushing force applied to the second end portion 122 by the two pushers 17 is greater than the elastic force applied to the second end portion 122 by the two elastic force driving elements 16, the first end portions 121 of the two clamping arms 12 respectively swing in the direction away from each other, so as to open the PCB entry port 102. On the contrary, when the second pusher 17 releases the second end 122, the first ends 121 of the two clamping arms 12 are driven by the two elastic force driving elements 16 to swing in a relatively approaching direction, so as to clamp the PCB entry 102.

Referring to fig. 5 and 6, the PCB frame clip type bracket 10 of the present invention is illustrated as being disposed in an oven 20. More specifically, the conveying chains 30 capable of rotating in a circle are respectively disposed on both sides of the inside of the oven 20, and the cross bar 11 is bridged over the conveying chains 30 capable of rotating in a circle on both sides of the inside of the oven 20 (as shown in fig. 4c and fig. 6), so that the PCB frame-clip type bracket 10 of the present invention can be driven by the conveying chains 30 to move in a circle. The PCB cradle 10 can be moved to a pick-up end 301 and an unloading end 302 by the driving of the conveying chain 30, wherein the PCB cradle 10 picks up the PCB to be baked at the pick-up end 301 and unloads the baked PCB at the unloading end 302. Further, the pusher 17 is implemented to include a pusher 17a and a pusher 17b, wherein the pusher 17a is disposed at the picking end 301, and the pusher 17b is disposed at the unloading end 302. When the PCB frame clip type bracket 10 moves to the pick-up end 301, the PCB frame clip type bracket 10 opens the PCB entry port 102 by being driven by the pusher 17 a; when the PCB framing jig bracket 10 moves to the unloading end 302, the PCB framing jig bracket 10 opens the PCB introduction opening 102 by being driven by the pusher 17 b. The oven 20 is provided with a plurality of rolling wheels 40 at the picking end 301, and the PCB to be baked is carried by the rolling wheels 40 to move to the picking end 301. The oven 20 is provided with a conveyor belt 50 at the unloading end 302, whereby the conveyor belt 50 carries the baked PCBs away from the unloading end 302.

With reference to fig. 7a to 7h, the operation of the PCB-clip bracket 10 is sequentially illustrated to open the PCB entry 102 (fig. 7 a) when the PCB-clip bracket 10 is moved to the pick-up end 301 by the driving of the pusher 17a according to the above configuration. Then, the PCB60 enters the PCB receiving groove 101 through the PCB entry 102 by being carried by the roller wheel 40 (as shown in fig. 7 b). When the end edge of the PCB60 contacts the stopping portion 111, the pusher 17a releases the two clip arms 12, so that the two clip arms 12 are driven by the elastic force driving element 16 to swing in the relatively approaching direction (as shown in fig. 7 c), and further to clamp the PCB insertion opening 102, so that the two clip arms 12 clamp the PCB60 (as shown in fig. 7 d). Then, when the PCB60 is moved to the unloading end 302 by the carrying of the conveying chain 30, the PCB cradle 10 opens the PCB introduction opening 102 (as shown in fig. 7 e) by the driving of the pusher 17b, so that the PCB60 is placed on the conveying belt 50. After the PCB60 is carried by the conveyor belt 50 and leaves the PCB receiving slot 101 through the PCB entry 102 (as shown in fig. 7 f), the pusher 17b releases the two clamping arms 12, so that the two clamping arms 12 are driven by the elastic force driving element 16 to swing in the relatively approaching direction (as shown in fig. 7 g), and further clamp the PCB entry 102 (as shown in fig. 7 h), thereby completing the operation of the PCB frame-clamped carrier 10 clamping the PCB 60.

Referring to fig. 8, the method for supporting the PCB by the bracket according to the present invention includes the following steps S1 to S4:

step S1: construction polygon bracket

Referring to fig. 2 and 3, it is illustrated that the polygonal bracket 10 includes at least one cross bar 11 as a fixed end connected to two movable side bars 12 to form a frame, so that a PCB receiving slot 101 having a surface space and a PCB receiving opening 102 formed at an end of the PCB receiving slot 101 are formed in the polygonal bracket 10. The two movable side rods (i.e., the two clamping arms 12) can open or clamp the PCB entry 102 in a relatively reverse swinging manner to control the size of the PCB entry 102 and the area of the surface area of the PCB receiving slot 101, so as to improve the convenience of the PCBs 60 with different specifications and dimensions when being clamped by the polygonal bracket 10, and to improve the convenience of mechanical operation.

Step S2: pick-up PCB

Referring to fig. 7a, it is illustrated that when the bracket 10 moves to the capturing end 301, the two movable side rods (i.e., the two clamping arms 12) are driven to open the PCB inlet 102 in a relatively opposite (relatively far) swinging manner, so as to control the width of the PCB inlet 102 to be greater than the width of the PCB60, and control the area of the PCB receiving cavity 101 to be greater than the area of the PCB60, so that the PCB60 can swing into the PCB receiving cavity 101 through the PCB inlet 102. Referring to fig. 7b, it is illustrated that a quadrilateral PCB60 can be swung into the PCB receiving groove 101 through the PCB entry 102, the quadrilateral PCB60 has two

end edges

601, 603 and two opposite end edges 602, 604, wherein the end edge 601 is parallel to the at least one cross bar 11, so that after the PCB60 is swung into the PCB receiving groove 101 through the PCB entry 102, the end edge 601 of the PCB60 can be in close contact with the at least one cross bar 11, so that the at least one cross bar 11 can support the end edge 601 of the PCB 60. Referring to fig. 7c, it is illustrated that the two movable side rods (i.e., the two clamping arms 12) are driven to clamp and retract the PCB receiving opening 102 in a relatively opposite (relatively approaching) swinging manner, so that the two movable side rods (i.e., the two clamping arms 12) clamp and support the PCB60 in the PCB receiving slot 101. The two movable side rods (i.e. the two clamping arms 12) clamp and hold the two opposite end edges 602 and 604 of the PCB60 in a manner of force application of the oblique arms, so that the two movable side rods (i.e. the two clamping arms 12) can apply oblique pushing force to the two opposite end edges 602 and 604 when clamping and holding the two opposite end edges 602 and 604 of the PCB60, so that the end edge 601 of the PCB60 is in close contact with the at least one cross bar 11. Therefore, the stability of the PCB60 when being clamped is improved, and the PCB60 is prevented from shaking in the moving and baking process.

And step S3: carrying PCB

Referring to fig. 7d and 7e sequentially, after the carrier 10 picks up the PCB60 at the picking end 301, the carrier 10 is driven by the conveying chain 30 to clamp the PCB60 and move to the unloading end 302, and the PCB60 is baked or dried in the oven 20 during the process of moving from the picking end 301 to the unloading end 302.

And step S4: uninstalling a PCB

Referring to fig. 7e and 7f sequentially, when the carriage 10 holds the PCB60 and moves to the unloading end 302, the two movable side bars (i.e., the two clamping arms 12) are driven to swing in opposite directions (in opposite directions) to open the PCB entry 102, so that the two movable side bars (i.e., the two clamping arms 12) are separated from the two opposite end edges 602, 604 of the PCB60, so as to unload the PCB60 onto the conveyor belt 50.

The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A PCB frame clip type bracket is characterized by comprising:

a cross bar;

two clamping arms which are symmetrically arranged on both sides of the cross rod in a manner of relatively rotating and swinging reversely, so that the cross rod is positioned between the two clamping arms, a span part is symmetrically formed on each of the two clamping arms, a PCB accommodating groove is formed by the frame enclosure between the two span parts and the cross rod, and the PCB accommodating groove is provided with a PCB accommodating port relatively far away from the cross rod;

two elastic force driving elements which are symmetrically arranged on the two clamping arms and drive the two clamping arms to oppositely rotate and swing to clamp the PCB placing inlet; and

and the two pushers are symmetrically arranged at one fixed end outside the two clamping arms and respectively drive the two clamping arms to elastically open the PCB entrance.

2. The PCB framing bracket of claim 1, wherein: at least one blocking part is convexly arranged at the position of the cross rod close to the middle section, and the PCB accommodating groove frame is formed between the two span parts and the blocking part of the cross rod in a surrounding manner.

3. The PCB framing bracket of claim 1, wherein: two sides of the cross bar are respectively provided with a vertical rod in a protruding way, the two clamping arms are respectively symmetrically formed with a pivoting part, and the two clamping arms are respectively symmetrically arranged on the vertical rod through the pivoting parts and are further pivoted on the two sides of the cross bar in a manner of being capable of rotating oppositely.

4. The PCB framing bracket of claim 3, wherein: the two elastic force driving elements are two torsion springs respectively arranged on the two pivoting parts, each torsion spring is provided with a first spring foot and a second spring foot, the first spring foot presses and contacts the clamping arm, and the second spring foot presses and contacts the vertical rod.

5. The PCB framing bracket of claim 3, wherein: the two clamping arms are respectively provided with a first end part and a second end part, the spanning part is formed at the first end part, the two pushers are respectively driven in a press-contact mode and release the second end part, and the pivoting part is located between the first end part and the second end part.

6. The PCB framing bracket of claim 1, wherein: the cross bar is bridged on a conveying chain which can rotate in a circle at two sides in an oven.

7. The PCB framing bracket of claim 6, wherein: the bracket is driven by the conveying chain to pass through a picking end and a discharging end.

8. The PCB framing bracket of claim 1, wherein: the thickness of the PCB is between 0.8mm and 5.0 mm.

9. A method for bearing a PCB by using a frame-clip type bracket is characterized by comprising the following steps:

constructing a polygonal bracket, wherein the polygonal bracket comprises at least one cross rod connected with two movable side rods to form a frame, so that a PCB accommodating groove with a surface area space and a PCB accommodating opening formed at the end edge of the PCB accommodating groove are formed in the polygonal bracket;

and then executing a PCB picking step, comprising:

providing a pusher to drive the two movable side rods, opening the PCB entrance in a relatively reverse rotation and swing mode, and controlling the size of the PCB entrance and the area of the PCB containing groove;

placing a quadrilateral PCB in the PCB accommodating groove, then providing an elastic force to drive the two movable side rods to clamp and retract the PCB accommodating opening in a relatively reverse rotating and swinging mode, and clamping and supporting the PCB in the PCB accommodating groove;

the two movable side rods clamp and support two opposite end edges of the PCB in a force application mode of the inclined arms, and at least one end edge between the two opposite end edges of the PCB is supported on the at least one cross rod.

10. The method of claim 9, wherein the PCB is carried by a frame-clip-type carrier, the method comprising: the two movable side rods are respectively connected to the at least one cross rod in a pivoting manner.

11. The method of claim 9, wherein the PCB is carried by a frame-clip-type carrier, the method comprising: the step of picking up the PCB further comprises a step of carrying the PCB, wherein the at least one cross bar is bridged on a conveying chain which can rotate in a circle at two sides in an oven so as to carry the PCB on the bracket to enter the oven for baking or drying.

12. The method of claim 11, wherein the PCB is carried by a frame-clip-type carrier, the method comprising: the PCB unloading step is also included after the PCB carrying step, the two movable side rods are driven to open the PCB placing opening in a relatively reverse rotation and swing mode so as to unload the PCB on the bracket onto a conveying belt.

13. The method of claim 9, wherein the PCB is carried by a frame-clip-type carrier, the method comprising: the thickness of the PCB is between 0.8mm and 5.0 mm.