KR20210098125A - Load Cell Type Component Insert Detecting Device - Google Patents

Abstract

The present invention relates to a device for detecting whether a component inserted into a printed circuit board (PCB) is normally inserted or not, which is installed in a head unit (100) of a device for inserting a component into the PCB, which comprises: a slade (110) engaging with a lever block (101) operated by a cam to move vertically along a guide rail (102) arranged in a vertical direction; a slade-bound unit (120) joined to the slade (110) to be able to slide to move vertically along with the slade (110); a lower block (130) joined to the lower end portion of the slade-bound unit (120) to support the lower end portion of the slade (110); an inserter (140) joined to one side of the slade-bound unit (120) to be disposed in a vertical direction and have a finger (145) which picks a component up and inserts the same into the lower end portion; and a load cell (150) interposed between the slade (110) and the lower block (130) to measure the repulsive force (pressure) transferred through the inserter (140) when any component is inserted, wherein when the repulsive force measured in the load cell (150) does not exceed a predetermined range, the insertion is considered normal. According to the present invention, durability and reliability of the device are enhanced.

Description

Load Cell Type Component Insert Detecting Device

The present invention is a device for installing a load cell in the head part 100 of equipment for inserting a component such as a terminal into a printed circuit board (PCB), and detecting whether the component is normally inserted by using the repulsive force (pressure) measured in the load cell. is about

In the case of equipment that automatically inserts parts such as metal terminals into a printed circuit board (PCB), supply, insertion, and inspection of parts are all done automatically. and the force method.

The energized method is a method of inspecting with a sensor using a part of the component protruding from the bottom of the PCB when inserting the component, and the force method is a method of inspecting using the pressure detected when inserting the component using a load cell. Compared to the energized method that inspects the protrusion length, the force method that can detect the entire process of inserting a part is more preferred.

In the case of the force method using a load cell, the load cell is generally mounted to be located below the printed circuit board (PCB), and an anvil unit as shown in FIG. ), whenever a component is inserted, the anvil equipped with the load cell moves up and down to support the lower surface of the printed circuit board (PCB).

This anvil method is a commonly used method, but in the case of a printed circuit board (PCB) in which solder cream is used, the upper end of the anvil is easily contaminated by the solder cream, and there is a problem that a separate servo motor is required for vertical movement. .

In order to solve this problem, a method of directly connecting the load cell to the head of the equipment (the inserter portion equipped with a finger for picking and inserting parts) is also considered, but when a micro load cell is mounted, the process of repeating up and down motion at high speed In this case, there is a problem that the durability and reliability of the detection device are rapidly reduced, and in order to increase the durability and reliability, when a larger and stronger load cell is mounted, the weight of the inserter part is increased, and there is a problem that the insertion speed of the equipment is lowered.

Therefore, it is necessary to develop a new concept detection device capable of high-speed insertion and improving durability and reliability without being affected by the presence or absence of solder cream.

[Prior art literature]

Registered Patent No. 10-1419461

Registered Patent No. 10-1520677

Registration Design No. 20-0134045

The present invention, created to solve the above problems, enables high-speed insertion of parts such as terminals, and is a load cell-type component insertion detection device of a new concept that can improve durability and reliability without being affected by the use of solder cream. Its purpose is to provide

The technical configuration of the present invention created to achieve the above object is as follows.

The present invention relates to a device installed in a head part 100 of equipment for inserting a component into a printed circuit board (PCB) and detecting whether a component inserted into the PCB is normally inserted, and a lever block 101 operated by a cam. and a sled 110 that engages and ascends and descends along the guide rail 102 arranged in the vertical direction; Slade coupling portion 120 coupled to the slidable structure to the sled 110 and elevating and descending together in conjunction with the sled 110; a lower block 130 coupled to the lower end of the sled fastening unit 120 to support the lower end of the sled 110; an inserter (140) coupled to one side of the sled fastening part (120) and arranged in a vertical direction, the inserter (140) having a finger (145) for picking and inserting parts at the lower end; and a load cell 150 installed between the sled 110 and the lower block 130 and measuring the repulsive force (pressure) transmitted through the inserter 140 when the part is inserted. 150), if the repulsive force measured in the preset range does not deviate from it, it is characterized in that it is determined as a normal insertion.

Technical effects according to the configuration of the present invention are as follows.

First, since the micro load cell can be stably mounted on the head part 100 of the equipment, the load due to the load is minimized, and the insertion speed of parts such as terminals can be improved.

Second, the load cell and anvil are installed on the lower part of the printed circuit board (PCB) to exclude the method of ascending and descending, so it is not affected by the use of solder cream.

In other words, by installing a flat pallet with grooves formed in a predetermined pattern as shown in FIG. 5 under the printed circuit board (PCB), regardless of whether solder cream is used, the sagging of the printed circuit board (PCB) is reduced. It can be supported stably while preventing it.

Third, the load cell 150 is stably installed in the space between the sled 110 that stably elevates and descends along the guide rail 102 and the lower block 130 that supports the lower end of the sled 110 to elevate and descend together. Even if it is manufactured in a structure to improve the insertion speed of the component, the durability of the load cell 150 or other components can be guaranteed.

Fourth, by using the spring adjustment bolt 160 and the spring 170, the load cell 150 can be compensated for the deviation in contraction and expansion according to the temperature or humidity, thereby improving the reliability of the detection device.

1 exemplarily shows a prior art in which a load cell and an anvil are installed under a printed circuit board (PCB).
Figure 2 shows the overall outline of a specific embodiment of the present invention.
3 shows a cut-away cross-sectional structure of a specific embodiment of the present invention.
4 exemplarily shows a graph of the repulsion force (pressure) provided to the computer 190 monitor.
5 shows a case in which the pallet is installed under the printed circuit board (PCB), rather than the method in which the load cell and the anvil are installed under the printed circuit board (PCB) to elevate.

Hereinafter, specific embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

The present invention relates to a device installed in a head unit 100 of equipment for inserting a component into a printed circuit board (PCB) and detecting whether a component inserted into the PCB is normally inserted.

The sled 110 engages with the lever block 101 whose upper part is operated by a cam as shown in FIG. 2 , and repeats elevating and lowering along the guide rail 102 arranged in the vertical direction.

Since the structure of the cam is the same as or similar to the internal structure of a general part insertion device, a separate description will be omitted.

The guide rail 102 serves to accurately maintain verticality and prevent the sled 110 from being separated in the process of elevating and lowering the sled 110 in conjunction with the cam. can be selected, or it can be self-processed and installed according to the equipment.

The sled fastening unit 120 is coupled to the sled 110 in a slidable structure and interlocks with the sled 110 to repeat elevating and lowering together.

That is, the sled fastening part 120 is not fixed to the sled 110, but is coupled to be able to ascend and descend in the vertical direction within a predetermined range, and when the sled 110 rises and descends, it rises and descends together.

The lower block 130 is coupled to the lower end of the sled fastening unit 120 and serves to support the lower end of the sled 110, and a portion of the upper surface of the lower block 130 protrudes upward to form a stepped structure. .

The inserter 140 is provided with a finger 145 at the lower end to perform a function of picking up parts and directly inserting them into a printed circuit board (PCB). It is coupled so as to be arranged in the vertical direction, and the elevating and lowering is repeated with the sled 110 and the sled fastening unit 120 that elevate and descend in conjunction with the cam.

The structure and process in which the finger 145 of the inserter 140 picks up and inserts a component such as a terminal is the same as or extremely similar to a general component insertion device, so a separate description will be omitted.

The load cell 150 is installed between the sled 110 and the lower block 130 as shown in FIG. 3 , and measures the repulsive force (pressure) transmitted through the inserter 140 when the component is inserted.

The load cell 150 is inserted to be accommodated in an area that does not protrude upward from the upper surface of the lower block 130 and is installed to abut against the lower surface of the sled 110 . (140) and the lower block 130, and repeats the elevating and lowering, it can be stably mounted in the inner space formed of the sled 110, the sled fastening part 120 and the lower block 130, a very small load cell (weight Even if 1~2g) is installed, sufficient durability can be secured, and deformation of the load cell mounting structure due to repetitive work can be prevented.

If the repulsive force measured by the load cell 150 does not deviate from a preset range, it may be determined as normal insertion, and if it is outside the set range, it may be determined as abnormal insertion.

A spring support protrusion 115 is provided at the lower portion of the sled 110 , which protrudes from the lower portion of the sled 110 in the horizontal direction to support the lower end of the spring 170 as shown in FIG. 3 .

The bolt fastening block 125 is provided in the sled fastening part 120, and may be coupled to the outer surface of the sled fastening part 120 with a bolt or the like as shown in FIG. 2 or 3, and the sled fastening part 120. and may be made integrally with

The spring adjustment bolt 160 is fastened to penetrate the bolt fastening block 125 in the vertical direction to support the upper end of the spring 170 .

The spring 170 is installed so that both ends abut the lower end of the spring adjustment bolt 160 and the upper surface of the spring support protrusion 115 , respectively, to elastically support the sled 110 and the sled coupling unit 120 .

As shown in FIG. 3 , the load cell height adjustment bolt 180 is fastened to penetrate the lower block 130 in the vertical direction and abuts against the lower surface of the load cell 150 , and the load cell 150 is the lower surface of the sled 110 . It acts as a support by pushing it in contact with the

By tightening or loosening the load cell height adjustment bolt 180, the height of the load cell 150 installed between the lower block 130 and the sled 110 can be finely adjusted within a preset range, and the spring adjustment bolt 160 can be tightened. When tightened or released, the elastic force of the spring 170 installed between the spring adjustment bolt 160 and the spring support protrusion 115 is adjusted, and the deviation in which the load cell contracts or expands according to the temperature can be compensated.

The load cell controller 155 is mounted on the head unit 100 and serves to receive and transmit the measurement value of the load cell 150 to the outside.

The computer 190 stores the measured values transmitted from the load cell controller 155 and presents the numerical values for the measured values together with a graph through the monitor.

4 exemplarily shows a repulsive force (pressure) graph provided by the computer 190 monitor, and sections for just before insertion, during insertion, and for insertion completion from the top are displayed in an oval shape.

The state just before insertion is the moment immediately before a part such as a terminal touches the printed circuit board (PCB), and the area just before the repulsive force (pressure) rises is displayed in an oval shape. As a process through which the repulsive force (pressure) is initially reduced after overshooting occurs and then slowly increases, the area is marked with an oval shape. The area where the repulsive force (pressure) rises due to compression is indicated by an oval.

As described above, specific embodiments of the present invention have been described with reference to the accompanying drawings, but the protection scope of the present invention is not necessarily limited to these embodiments, and various design changes within the scope that do not change the technical gist of the present invention, It is clear that addition or deletion of known technology, simple numerical limitation, etc. fall within the protection scope of the present invention.

100: head
101: lever block
102: guide rail
110: Slade (Slade)
115: spring support projection
120: Slade binding part
125: bolt fastening block
130: lower block
140: Inserter (Inserter)
145: finger (Finger)
150: load cell (Load cell)
155: load cell controller
160: spring adjustment bolt
170: spring
180: load cell height adjustment bolt
190: computer

Claims (4)

It is installed in the head part 100 of equipment for inserting a component into a printed circuit board (PCB), and relates to a device for detecting whether a component to be inserted into the PCB is normally inserted,
A sled 110 engaged with the lever block 101 operated by a cam, and ascending and descending along the guide rail 102 arranged in the vertical direction;
a sled coupling unit 120 coupled to the sled 110 in a slidable structure and elevating and descending together in conjunction with the sled 110;
a lower block 130 coupled to the lower end of the sled fastening unit 120 to support the lower end of the sled 110;
an inserter (140) coupled to one side of the sled fastening part (120) and arranged in a vertical direction, the inserter (140) having a finger (145) for picking and inserting parts at the lower end; and,
a load cell 150 installed between the sled 110 and the lower block 130 and measuring a repulsive force (pressure) transmitted through the inserter 140 when a component is inserted;
including,
Load cell type component insertion detection device, characterized in that it is determined as normal insertion when the repulsive force measured by the load cell (150) does not deviate from a preset range. In claim 1,
a spring support protrusion 115 protruding horizontally from the lower portion of the sled 110;
a bolt fastening block 125 provided in the sled fastening part 120;
a spring adjustment bolt 160 fastened to penetrate the bolt fastening block 125 in a vertical direction; and,
a spring 170 installed so that both ends of the lower end of the spring adjustment bolt 160 and the upper surface of the spring support protrusion 115 are in contact with each other;
Load cell-type component insertion detection device, characterized in that it further comprises. In claim 1 or 2,
A load cell height adjustment bolt ( 180);
Load cell-type component insertion detection device, characterized in that it further comprises. In claim 3,
a load cell controller 155 for receiving the measurement value of the load cell 150 and transmitting it to the outside; and,
a computer 190 that stores the measured values transmitted from the load cell controller 155 and presents numerical values for the measured values with a graph through a monitor;
Load cell-type component insertion detection device, characterized in that it further comprises.

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