TWI660655B - PCB frame clip type bracket and method for carrying PCB by using the bracket - Google Patents

Abstract

The invention provides a PCB frame clip type bracket, which includes a cross bar on both sides of which is symmetrically configured with two clamp arms that can rotate in opposite directions. The two clamp arms are symmetrically formed with a span portion. A PCB-receiving slot is formed around the frame between the cross-bars, and the PCB-receiving slot has a PCB-receiving inlet relatively far from the cross-bars. Two elastic force driving elements are symmetrically arranged on the two clamping arms for driving. The two clamping arms are configured to pinch the PCB into the inlet with opposite rotation. The invention also provides a method for carrying the PCB by using the bracket, thereby improving the problem that the traditional PCB must increase the distance from other PCBs during the mobile baking process, thereby affecting the PCB baking capacity.

Description

PCB frame clip type bracket and method for carrying PCB by using the bracket

The invention relates to the structure technology of a PCB jig, and particularly relates to a PCB frame clip type bracket and a method for carrying a PCB by using the bracket.

During the manufacturing process of the printed circuit board (Printed circuit board, referred to as PCB), the ink coating, drying, baking, cleaning and other processes are usually used, and the conveying equipment is usually used to carry the PCB one by one through the work station of the above process. To increase productivity.

In PCB conveying equipment, it is often seen to use clamps to clamp the edges of the PCB, so that the PCB is held in a suspended form by the clamps, and the movable parts such as chains or belts are used to drive the clamps to move, thereby carrying The suspended PCB moves on the production line through the work station of the above process.

Taking the existing PCB baking equipment as an example, a continuous mobile PCB has been used to enter the tunnel oven for baking operations; for this reason, a loop-movable conveyor line is commonly used, and fixtures (such as (Taiwan Patent I225029). This fixture is used to clamp a frame part of the PCB that is not covered with ink, so that each piece of PCB can be held by the fixture at intervals, and moved into the oven in a hanging manner on the conveyor line to receive bake.

It is also known that the PCB is generally a quadrangular thin plate, and the area specifications (that is, the length and width dimensions) of the PCB are large or small, and the plate body is thick or thin. When the above-mentioned clamp is used to hang and transport the PCB through the oven, it is easy to cause the clamped PCB to shake, and the thinner the PCB, the more obvious the shaking phenomenon is.

Therefore, the industry usually increases the distance between the hanging fixtures on the PCB conveyor line in the oven to avoid accepting the clamped PCB during the mobile baking process. Defects such as ink sticking due to shaking. When the distance between the hanging fixtures on the board conveying line in the oven is larger, the number of pieces that can be hung on the oven to be baked in a unit of time will be relatively restricted, which will hinder the improvement of PCB baking capacity. .

In view of this, the present invention aims to improve the traditional PCB in order to avoid defects such as ink sticking due to shaking during the mobile baking process. Therefore, the spacing of the hanging fixtures on the board conveying line in the oven is increased, which affects To the problem of PCB baking capacity industry.

To this end, the present invention discloses a preferred embodiment to describe a PCB frame clip type bracket, particularly for carrying PCBs with a plate thickness between 0.8 mm and 5.0 mm. The main structural features of the frame clip type bracket include : One cross bar; two clamp arms, which are symmetrically arranged on both sides of the cross bar, which can be swiveled in opposite directions, so that the cross bar is located between the two clamp arms, and the two clamp arms are formed symmetrically respectively A span portion, a frame portion formed between the second span portion and the cross bar forms a PCB accommodating slot, and the PCB accommodating slot has a PCB placement inlet relatively far from the cross bar; and two elastic force driving elements are symmetrically disposed on the The two clamping arms are configured to drive the two clamping arms to rotate and clamp the PCB insertion opening relative to the reverse rotation.

In a further implementation, at least one stop portion is protruded near the middle portion of the cross bar, and the PCB receiving groove frame is formed between the two-span portion and the stop portion of the cross bar.

In a further implementation, a vertical bar is respectively convex on both sides of the crossbar, and a pivot joint is formed symmetrically on each of the two clamp arms, and the two clamp arms are symmetrically disposed on the vertical pole respectively through the pivot joint. It is further pivoted on opposite sides of the crossbar in a pivotable direction. The two elastic force driving elements are torsion springs, which are respectively disposed on two pivot joints. The two torsion springs each have a first spring leg and a second spring leg, and the first spring leg presses against the clip. Arm, the second spring foot presses against the upright.

In a further implementation, it further includes two pushers, which are symmetrically arranged at a fixed end outside the two clamp arms, and the two pushers respectively drive the two clamp arms to elastically open the PCB insertion inlet.

In a further implementation, the two clamp arms each have a first end portion And a second end portion, the cross portion is formed at the first end portion, the two pushers respectively drive and release the second end portion in a pressure-contact manner, and the pivot portion is located at the first end portion and Between the second ends.

In a further implementation, the cross bar is bridged on a double-rotating conveying chain inside an oven. The bracket is driven by a conveying chain to pass through a retrieval end and an unloading end.

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

In addition, the present invention also provides a method for carrying a PCB by using the bracket, including: constructing a polygonal bracket, the polygonal bracket comprising at least one horizontal rod connected to two movable side rods and surrounded by a frame, so that the polygonal bracket A PCB accommodating slot having a surface area space is formed therein, and a PCB accommodating entrance formed at an end edge of the PCB accommodating slot; and a step of extracting the PCB is performed, which includes: driving the two movable side bars to face each other. Swiveling in a reverse manner to open the PCB placement inlet, and control the size of the PCB placement inlet and the area of the PCB accommodation slot; place a quadrilateral PCB in the PCB accommodation slot, and then drive the two The movable side bar clamps the PCB placement inlet in a relatively reversely swinging manner, and clamps the PCB in the PCB accommodation slot; wherein the two movable side bars are clamped in the form of a force applied by an inclined arm The two opposite end edges of the PCB are supported, and at least one end edge between the two opposite end edges of the PCB is supported on the at least one fixed side bar.

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

In a further implementation, the two movable side bars are respectively driven by an elastic force to pinch the PCB placement inlet.

In a further implementation, the two movable side bars are respectively driven by a pusher to open the PCB insertion inlet.

In a further implementation, after the step of retrieving the PCB, a step of carrying a PCB is further included. The at least one cross bar is bridged on a double-rotatable conveying chain inside an oven to carry the bracket. PCB into this oven to bake Or dry.

In a further implementation, after the step of carrying the PCB, a step of unloading the PCB is further included to drive the two movable side bars to open the PCB insertion inlet in a relatively reversely rotating manner, thereby unloading the PCB on the bracket. Onto a conveyor belt.

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

According to the above technical means, the technical effects of the present invention are:

1. Utilizing the relative reverse swinging function of the double clamp arm (or movable side bar), it is convenient to control the space of the PCB insertion inlet and the PCB receiving slot, and then it is convenient to carry PCBs with different area specifications.

2. The brackets are used to fix the multiple edges of the quadrangular PCB, which can prevent the PCB from shaking during the mobile baking process, thereby reducing the distance that the PCB needs to maintain during the mobile baking process. Improve PCB baking capacity.

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

10‧‧‧ Bracket

101‧‧‧PCB receiving slot

102‧‧‧PCB entrance

11‧‧‧ Crossbar

111‧‧‧ Block

112‧‧‧ gap

12‧‧‧ Clamp Arm

121‧‧‧ first end

122‧‧‧ second end

123‧‧‧ Pivot

124‧‧‧ Cross Section

125‧‧‧ opening

13‧‧‧pole

14‧‧‧ bezel

15‧‧‧ shaft pin

16‧‧‧ Elastic force driving element

161‧‧‧The first spring feet

162‧‧‧Second spring feet

17, 17a, 17b‧‧‧ Pusher

20‧‧‧ Oven

30‧‧‧Conveying chain

301‧‧‧Capture terminal

302‧‧‧Unloading side

40‧‧‧Scroll wheel

50‧‧‧ conveyor belt

60‧‧‧PCB

601, 603‧‧‧

602, 604‧‧‧ opposite ends

Steps in S1 to S4‧‧‧ embodiments

1 is an exploded perspective view of the PCB frame clip bracket of the present invention; FIG. 2 is a perspective assembled view of FIG. 1; FIG. 3 is a front view of FIG. 2; FIG. 4a is an enlarged schematic view of the stopper in FIG. 2; 2 is an enlarged schematic view of a mid-span; FIG. 4c is a partially enlarged sectional view of FIG. 3; FIG. 5 is a sectional view of a PCB frame clip bracket of the present invention arranged inside the oven; FIG. 6 is a side view of FIG. 3; 7a to 7h are schematic diagrams of the operations of FIG. 5, respectively; and FIG. 8 is a flowchart of steps of a method for carrying a PCB by a frame clip bracket of the present invention.

The invention is aimed at PCBs with a plate thickness of 0.8 mm to 5.0 mm. It is very suitable to use a carrier in the form of a bracket to carry the PCB to move, instead of the traditional hanging fixture, to avoid the PCB from shaking during the carrying process. First, please refer to FIG. 1 to FIG. 3 in combination to disclose a preferred embodiment of the PCB frame clip bracket provided by the present invention, and explain that the main structure of the PCB frame clip bracket 10 includes a cross bar 11, two clip arms 12 and two. The elastic force driving element 16, wherein at least a plate-shaped stopper 111 for supporting the PCB is protruded at the middle portion of the crossbar 11. The two clamping arms 12 are symmetrically disposed on both sides of the crossbar 11, so that the blocking portion 111 is located between the two clamping arms 12. Further, a span portion 124 for clamping the PCB is formed symmetrically on the two clamping arms 12, respectively, and a PCB 60 accommodating slot 101 is formed between the two span portion 124 and the blocking portion 111. The PCB accommodating slot 101 has a PCB accommodating inlet 102 relatively far from the blocking portion 111, so that the PCB 60 can enter and exit the PCB accommodating slot 101 through the PCB accommodating inlet 102. Furthermore, the blocking portions 111 have a V-shaped notch 112 (as shown in FIG. 4a), and the blocking portions 111 support the PCB 60 through the notches 112; the two-span portions 124 each have a A V-shaped opening 125 (as shown in FIG. 4b), through which the two-span portion 124 clamps the PCB 60.

A vertical bar 13 is respectively convex on each side of the crossbar 11. A pivot joint portion 123 is formed symmetrically on the two clamp arms 12, and the clamp arm 12 is assembled with the pivot joint portion 123 and a pivot pin 15 through a shaft pin 15. The poles 13 are pivotally connected to the poles 13. The two clamp arms 12 are symmetrically arranged on the poles 13 through the pivoting portions 123, respectively, and are pivotally connected to the opposite poles. Both sides of the crossbar 11. Further, the two clamp arms 12 have a first end portion 121 and a second end portion 122, respectively. The span portion 124 is formed on the first end portion 121, and the pivot portion 123 is located on the first end portion 121. Between one end portion 121 and the second end portion 122.

Please refer to FIG. 1 and FIG. 4 c in combination, and explain that the two elastic force driving elements 16 are symmetrically disposed on the two clamp arms 12, and the two elastic force driving elements 16 are used to drive the two clamp arms 12 in opposite directions. The swing pinches the PCB placement inlet 102. Further, the two elastic force driving elements 16 are implemented as torsion springs. The two torsion springs respectively have a first spring leg 161 and a second spring leg 162, wherein the first spring leg 161 presses against the second of the clamp arm 12 An end portion 122, the second spring foot 162 presses against the vertical rod 13, so that the first end portions 121 of the two clamp arms 12 are respectively swiveled in a relatively close direction through the driving of two elastic force driving elements 16, Further, the PCB insertion opening 102 is pinched. Furthermore, a baffle 14 is provided on the vertical pole 13, and the baffle 14 is located on a path when the first end portion 121 is swung in a relatively close direction to restrain the first end portion 121. The angle when rotating in a relatively close direction can avoid mutual interference when the first end portion 121 of the two clamp arms 12 is rotating in a relatively close direction.

Please refer to FIG. 5, which illustrates that the PCB frame clip 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 clamp arms 12. The two pushers 17 can respectively drive the two clamping arms 12 to elastically open the PCB insertion inlet 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 thrust force applied by the two pushers 17 to the second end portion 122 is greater than the two elastic force driving elements 16 applied to the second end portion 122, When the second end portion 122 is elastic, the first end portions 121 of the two clamping arms 12 are swiveled in directions away from each other, thereby opening the PCB insertion inlet 102. Conversely, when the two pushers 17 release the second end portion 122, the first end portions 121 of the two clamp arms 12 are respectively rotated in a relatively close direction by the driving of the two elastic force driving elements 16, and further, Clip the PCB placement inlet 102.

Please refer to FIG. 5 and FIG. 6 together to explain that the PCB frame clip bracket 10 of the present invention is disposed in an oven 20. More specifically, two sides of the inside of the oven 20 are provided with a conveying chain 30 that can be rotated in a circle, and the crossbar 11 is connected to the two sides of the oven 20 with a conveying chain 30 that can be rotated in a circle (as shown in the figure). 4c and FIG. 6), so that the PCB frame clip bracket 10 of the present invention can be moved in a loop by the conveyance chain 30. The PCB frame clip bracket 10 can be moved to a picking end 301 and an unloading end 302 by the conveying chain 30. The PCB frame clip bracket 10 picks up a PCB to be baked at the picking end 301. , And unload the finished PCB at the unloading end 302. Further, the pusher 17 includes a pusher 17a and a pusher in implementation. An actuator 17b, where the pusher 17a is disposed at the 3 capturing end 01, and the pusher 17b is disposed at the unloading end 302. When the PCB frame clip bracket 10 is moved to the picking end 301, the PCB frame clip bracket 10 is opened by the pusher 17a to open the PCB insertion inlet 102; when the PCB frame clip bracket 10 is moved to the unloading end 302 At this time, the PCB frame clip bracket 10 is opened by the pusher 17b to open the PCB insertion inlet 102. Inside the oven 20, a plurality of rolling wheels 40 are pivotally arranged on the picking end 301, and the PCB to be baked is moved to the picking end 301 by the rolling wheel 40. The oven 20 is provided with a conveying belt 50 at the unloading end 302, and the conveyed belt 50 is used to carry the baked PCB away from the unloading end 302.

According to the above configuration, please refer to FIG. 7a to FIG. 7h in succession, and sequentially disclose the action explanatory diagram of the present invention, and explain that when the PCB frame clip bracket 10 is moved to the capturing end 301, the PCB frame clip bracket 10 passes through The driving of the pusher 17a expands the PCB inlet 102 (as shown in FIG. 7a). Then, the PCB 60 enters the PCB accommodating slot 101 (as shown in FIG. 7 b) through the PCB receiving inlet 102 through the carrying of the rolling wheel 40. When the end of the PCB 60 contacts the blocking portion 111, the pusher 17a releases the two clamp arms 12 to rotate the two clamp arms 12 in a relatively close direction through the driving of the elastic force driving element 16 ( As shown in FIG. 7c), the PCB insertion inlet 102 is further clamped, whereby the two clamping arms 12 clamp the PCB 60 (as shown in FIG. 7d). Then, when the PCB 60 is moved to the unloading end 302 by the transportation of the conveying chain 30, the PCB frame clip bracket 10 is opened by the pusher 17b to open the PCB insertion inlet 102 (as shown in FIG. 7e), The PCB 60 is placed on the conveyor belt 50. When the PCB 60 leaves the PCB accommodating slot 101 (as shown in FIG. 7f) through the PCB loading inlet 102 through the conveyance of the conveyor belt 50, the pusher 17b releases the two clamping arms 12 so that the two clamping arms 12 Rotate in a relatively close direction through the driving of the elastic force driving element 16 (as shown in FIG. 7g), and then pinch the PCB insertion inlet 102 (as shown in FIG. 7h) to complete the PCB frame clip bracket. 10 Hold the PCB 60 to move the job.

Please refer to FIG. 8, which discloses a method for carrying a PCB by using the bracket provided by the present invention, which includes performing the following steps S1 to S4 in order:

Step S1: Construct the polygon bracket

Please refer to FIG. 2 and FIG. 3 in combination, and explain that the polygonal bracket 10 includes at least one cross bar 11 as a fixed end which is connected to two movable side bars and is framed. The two movable side bars refer to the two clamps described above. The arm 12 is used to form a PCB accommodating slot 101 having a surface area in the polygonal bracket 10 and a PCB accommodating inlet 102 formed at an end of the PCB accommodating slot 101. Wherein, the two movable side bars (that is, the two clamping arms 12) can open or pinch the PCB insertion inlet 102 in a relatively reversely rotating manner to control the size of the PCB insertion inlet 102 and the The area of the area of the PCB accommodating groove 101 can not only improve the convenience of the PCBs 60 of different specifications when being clamped by the polygonal bracket 10, but also be more convenient in terms of mechanical movement.

Step S2: Retrieve the PCB

Referring to FIG. 7a, when the bracket 10 is moved to the capturing end 301, the two movable side bars (that is, the two clamp arms 12) are driven to swing in a relatively reverse direction (a relatively far away direction). To open the PCB placement inlet 102, thereby controlling the width of the PCB placement inlet 102 to be greater than the width of the PCB 60, and controlling the area of the PCB accommodation slot 101 to be larger than the area of the PCB 60, so that the PCB 60 can pass through the PCB placement The inlet 102 swings into the PCB receiving slot 101. Referring to FIG. 7b, a quadrangular PCB 60 can be placed in the PCB receiving slot 101 through the PCB insertion inlet 102. The quadrilateral PCB 60 has two end edges 601 and 603 and two opposite end edges 602 and 604. Wherein, the end edge 601 is parallel to the at least one cross bar 11, so that the PCB 60 can be placed in the PCB receiving slot 101 through the PCB insertion inlet 102, and the end edge 601 of the PCB 60 can be connected to the at least one cross bar 11. They are in close contact so that the at least one crossbar 11 can support the end edge 601 of the PCB 60. Referring to FIG. 7c, the driving of the two movable side bars (that is, the two clamping arms 12) is described to clamp the PCB insertion inlet 102 in a relatively reverse (relatively close direction) swing manner, so that the two Two movable side bars (that is, two clamping arms 12) clamp the PCB 60 in the PCB receiving slot 101. The two movable side bars (that is, the two clamp arms 12) are used to clamp the two opposite end edges 602, 604 of the PCB 60 in the form of a force applied by an inclined arm, so that the two movable side bars (that is, Two clamp arms 12) When clamping the two opposite end edges 602, 604 of the PCB 60, it can apply oblique thrust to the two opposite end edges 602, 604, so that the end edge 601 of the PCB 60 and the at least one Crossbar 11 tightly connected touch. Thereby, the stability of the PCB 60 when receiving the clamp is improved, thereby preventing the PCB 60 from shaking during the moving and baking process.

Step S3: Carry the PCB

Please refer to FIG. 7d and FIG. 7e in order to explain that when the bracket 10 captures the PCB 60 at the picking end 301, the bracket 10 moves the PCB 60 to the unloading end 302 through the driving of the conveying chain 30, and the PCB 60 During the process of moving from the picking end 301 to the unloading end 302 in the oven 20, baking or drying is performed.

Step S4: Uninstall the PCB

Please refer to FIG. 7e and FIG. 7f in sequence to explain that when the bracket 10 holds the PCB 60 and moves to the unloading end 302, the two movable side bars (that is, the two clamp arms 12) are driven in the opposite direction (relative to Away from the direction) to open the PCB insertion opening 102, so that the two movable side bars (ie, two clamp arms 12) leave the two opposite end edges 602, 604 of the PCB 60, so as to facilitate The PCB 60 is unloaded on the conveyor belt 50.

The above embodiments merely express the preferred embodiments of the present invention, but cannot be understood as limiting the scope of patents of the present invention. Therefore, the present invention shall be subject to the content of the claims defined in the scope of the patent application.

Claims (16)

A PCB frame clip-type bracket includes: a cross bar; two clip arms, which are symmetrically arranged on both sides of the cross bar and can be rotated in opposite directions, so that the cross bar is located between the two clip arms, A span portion is formed symmetrically on each of the two clamp arms, and a PCB receiving slot is formed around the frame between the two span portion and the cross bar, and the PCB receiving slot has a PCB receiving inlet relatively far from the cross bar; and Two elastic force driving elements are symmetrically arranged on the two clamping arms, and drive the two clamping arms to rotate the opposite direction of the two clamping arms to pinch the PCB into the inlet. The PCB frame clip bracket according to claim 1, wherein the cross bar is provided with at least one stop near the middle section, and the PCB accommodating groove is formed around the frame of the two-span portion and the cross bar. Between departments. The PCB frame clip bracket according to claim 1, wherein a vertical bar is respectively convex on each side of the cross bar, a pivot joint is formed symmetrically on the two clip arms, and the two clip arms pass through the two The pivot joint portion is symmetrically arranged on the vertical pole, and is further pivotally connected to both sides of the crossbar so as to be relatively swiveled in the opposite direction. The PCB frame clip bracket according to claim 3, wherein the two elastic force driving elements are torsion springs, which are respectively arranged on two pivot joints, and the two torsion springs each have a first spring foot and a first spring leg. Two spring feet, the first spring foot presses against the clamp arm, and the second spring foot presses against the upright. The PCB frame clip bracket according to claim 1 or 3, further comprising two pushers, which are symmetrically arranged at a fixed end outside the two clip arms, and the two pushers respectively drive the elasticity of the two clip arms Open the PCB into the entrance. The PCB frame clip bracket according to claim 5, wherein the two clamp arms have a first end portion and a second end portion respectively, the span portion is formed at the first end portion, and the two pushers The second end portion is driven and released by pressing, and the pivot portion is located between the first end portion and the second end portion. The PCB frame clip-type bracket according to claim 5, wherein the cross bar is bridged on a double-rotating conveying chain inside an oven. The PCB frame clip type bracket according to claim 7, wherein the bracket is driven by a conveying chain through a pick-up end and a unloading end. The PCB frame clip bracket according to claim 1, wherein the thickness of the PCB is between 0.8 mm and 5.0 mm. A method for carrying a PCB by using a frame clip type bracket includes constructing a polygonal bracket, the polygonal bracket includes at least one cross bar connected to two movable side bars and formed by a frame, so that a polygonal bracket is formed in the polygonal bracket. A PCB accommodating slot in the area space, and a PCB accommodating inlet formed at an end of the PCB accommodating slot; a step of extracting the PCB is performed, which includes: driving the two movable side bars to rotate in opposite directions. To open the PCB placement entrance, and control the size of the PCB placement entrance and the area of the PCB accommodation slot; place a quadrilateral PCB in the PCB accommodation slot, and then drive the two movable side bars to The PCB insertion inlet is clamped in a relatively reversed swing manner, and the PCB is held in the PCB receiving slot; wherein the two movable side bars are used to clamp the PCB in the form of a biased arm. Two opposite end edges, and at least one end edge between the two opposite end edges of the PCB is supported on the at least one cross bar. The method for carrying a PCB by using a frame clip bracket according to claim 10, wherein the two movable side bars are respectively pivotally connected to the at least one cross bar. The method for carrying a PCB by using a frame clip bracket according to claim 10 or 11, wherein the two movable side bars are respectively driven by an elastic force to pinch the PCB placement inlet. The method for carrying a PCB by using a frame clip bracket as described in claim 10 or 11, wherein the two movable side bars are respectively driven by a pusher to open the PCB placement inlet. The method for carrying a PCB by using a frame clip bracket as described in claim 10, wherein the step of carrying the PCB is further included after the step of retrieving the PCB. The conveyor chain is rotated in a circle to carry the PCB on the bracket into the oven for baking or drying. The method for carrying a PCB by using a frame clip bracket as described in claim 14, wherein the step of unloading the PCB after the step of carrying the PCB further drives the two movable side bars to open in a relatively reversely rotating manner The PCB is placed in an inlet to unload the PCB on the bracket to a conveyor belt. The method for carrying a PCB by using a frame clip bracket as described in claim 10, wherein a thickness of the PCB is between 0.8 mm and 5.0 mm.