KR0131578Y1 - Height control device for back-up table - Google Patents

Abstract

The present invention relates to a backup table height adjustment device.

The present invention is located in the upper frame and supported by the backup table capable of the up / down movement, the backup pin coupled to the upper surface of the backup table to support the PCB, the lifting device for raising / lowering the backup table, and the lifting It comprises a power source for transmitting a driving force to the lowering device, a sensing device for controlling the position of each step of the elevating device, and a control device 10 for transmitting an operation signal to the mobilization force.

The present invention can adjust the height of the backup table in a variety of ways, it will be able to improve the work efficiency significantly compared to the prior art when used in the assembly line, such as the PCB is used a lot.

Description

Backup Table Height Adjuster

1 is a schematic configuration diagram of a conventional backup table height adjusting device.

2 is a plan view of the backup table shown in FIG.

3 is a detailed view of the backup pin device shown in FIG.

Figure 4 is a schematic device configuration of the backup table height adjustment device according to the present invention.

5 is a plan view of the backup table height adjustment device shown in FIG.

* Explanation of symbols for main parts of the drawings

1: frame 2: shaft

3: bush 4: table

5: fastener 6: cushion

7: Cylinder 8: Cylinder lift pipe

9: cylinder lowering pipe 10: control device

11: body 12: pin

13: spring 14: holder

15: banana jack (bannana jack) 7 ': lifting device

8 ': power source 11', 12 ', 13': home sensor

The present invention relates to a height adjustment device for a back up table, and more particularly, a height of a backup table used for equipment that must support a printed circuit board (PCB) at a predetermined position during work such as a surface mounting device or a release part inserter. It relates to a control device.

Today, one of the most common words related to the development of industrial technology is the word mechatronics. This is a compound word of mechanics, which means mechanics and mechanics, and electronics, which means electronic engineering. It can be understood as a term referring to a complex academic field in which the mechanical engineering field and the electrical / electronic engineering field formed by adding electric / electronic circuits are merged. From this point of view, the products of mechatronics can be easily found not only in the industrial field but also in everyday life. One example is the CNC (Computer Numerical Control) lathe. It is possible to add a computer and an electronic circuit board to a conventional general-purpose lathe and operate the numerical control system using a computer to adjust things that have been manually adjusted in the past. Is showing. As such, the products of mechatronics have mechanical and electrical / electronic elements in common, although they vary in form and structure. And, the electrical / electronic components make up some control circuits in most cases, and those control circuits are also mostly assembled on the PCB.

Such PCBs are particularly used in the electronic assembly industry, and in FIG. 1 of the accompanying drawings, a conventional backup table device for moving and supporting such a PCB at a predetermined height or a desired state according to the assembly process situation. Is schematically shown. Referring to this, the backup table apparatus comprises a frame 1 supporting the table 4, an axis 2 which is coupled to the frame 1 and the table 4 at right angles and serves as a support. A cylindrical bush (3) surrounded by the outside of the shaft (2) to support the shaft (2), a backup pin (BP) assembled to the table (4) to support the PCB, and positioned at the center of the table (4) The cylinder 7 for raising and lowering the table, and the cylinder up / down pipes 8 and 9 that are provided on both sides of the cylinder 7 and are involved in the raising and lowering of the cylinder 7, and the cylinder 7. It consists of the control apparatus 10 which transmits a rising or falling command. Here, unexplained reference numeral 5 is a fixing member, and 6 is a cushion. In addition, the same components mentioned later are designated by the same reference numerals.

The operation relationship of the conventional backup table having such a configuration will be briefly described.

When the PCB comes to the working position while the backup pin BP is inserted into the groove of the backup table 4, the control device 10 issues an ascending command to the pneumatic cylinder 7. Then, a synergistic pneumatic pressure is applied into the cylinder lift pipe 8 so that the backup table 4 is raised. Therefore, the backup pin device BP fixed to the backup table 4 is also raised so that the pin 12 (see FIG. 3) protruding from the top of the backup pin device contacts the lower surface of the PCB while supporting the PCB. . In this state, work on the PCB proceeds according to the working process. When the operation is completed, the cylinder lower command is transmitted from the control device 10, and the lowering action pneumatic pressure is applied into the cylinder lowering pipe (9). Then, the cylinder 7 is lowered, and as a result, the backup pin device BP that was supporting the PCB is lowered along with the lowering of the backup table 4. The PCB then follows the next step.

2 and 3 are partial views of the backup table apparatus shown in FIG. 1, FIG. 2 is a plan view of the backup table, and FIG. 3 is a device configuration diagram of the backup pin apparatus. As shown in FIG. 2, through-holes H and H 'of predetermined diameters are formed at both sides of the backup table and spaced apart from the center by predetermined distances. In addition, referring to Figure 3, the backup pin device is located in the lower end of the body 11 has a structure that can have a predetermined elastic force banana jack 15 is located, the compression spring is connected by a connecting rod thereon (13) and the pin 12 which receives a support force by the compression spring 13 is comprised.

By the way, in such a backup table apparatus of the related art, the cylinder 7 is a pneumatic cylinder, and only two positions of the on-off control, that is, the highest value and the lowest position control can be performed. Therefore, when the multi-level position control according to the situation is required, it is difficult to work.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a backup table height adjusting device having a means for freely adjusting the height of a backup table.

In order to achieve the above object, the backup table height adjusting apparatus according to the present invention includes a backup table which is positioned and supported on an upper part of the frame, capable of raising / lowering movement, and a backup pin coupled to an upper surface of the backup table to support a PCB. And a lifting device for lowering and lowering the backup table located at a lower portion of the frame, a power source connected to the lifting device to transmit driving power to the lifting device, and controlling the position of each step of the lifting device. It is characterized by having a sensing device and a control device 10 for transmitting an operation signal to the power source.

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

4 is a schematic configuration diagram of a backup table height adjusting device according to the present invention. Referring to this, the frame 1 which forms the basis of the device is a rectangular iron plate having a predetermined thickness, and a through hole (HS; see FIG. 5) is formed at each corner thereof with thread tabs which can be fixed by bolts. have. The frame 1 is thereby fixed by bolting to the perimeter frame of an assembly line. In addition, the through hole (H) for connection with the elevating device (7 ') in the center of the frame 1 is formed in the same vertical line as the through hole formed in the center of the backup table, for convenience The same way as the through-hole code of the backup table, the two through-holes described later also have the same reference marks as the through-holes of the backup table. A predetermined through hole H 'is also formed for the connection of the shaft 2 for guiding the up and down motion of 4) and preventing rotation of the backup table. On the upper part of the frame 1, a rectangular backup table 4 which is a little smaller than the size of the frame 1 is stacked and installed. A predetermined through hole (H) is formed in the center of the backup table (4), and bolts are continuously fastened to the through hole (H) and the through hole (H) formed in the center of the frame (1). It is connected with the elevating device 7 '. The through holes H 'corresponding to the same positions as the through holes on the frame 1 are formed on both sides of the center and spaced apart from the through holes H in the center. A bolt is fastened to the through hole H 'and connected to the shaft 2 having a predetermined diameter and length inserted into the through hole of the frame 1. The cylindrical bush 3 is wrapped around the shaft 2, and a ring-shaped fixing member 5 is provided on the upper portion of the bush 3 to support and fix the shaft. Here, the bush 3 supports the shaft 2 and at the same time serves as a guide during the vertical movement of the shaft. In addition, three backup pin devices BP having a cylindrical shape on the upper surface of the backup table 4 and having pins 12 at their ends are inserted and installed by a push-up method. Here, the backup pin device (BP) is not necessarily installed three at a predetermined position side by side, as shown, it is to be installed at any position of the backup table 4 by varying the number depending on the position of the PCB. It is supposed to be. That is, the backup table 4 is provided with a plurality of connection holes for insertion of the backup pin device in an even distribution over the entire surface of the table. In addition, a cushion 6 made of polyurethane is provided around the through hole H formed at the center of the frame 1 in order to alleviate the contact impact between the backup table 4 and the frame 1. A cushion 6 of the same material is also provided in the periphery of the through hole H 'for the shaft 2 formed on both sides of the central portion.

On the other hand, the elevating device (7 ') is connected to the lower end of the bolt (B) fastened to the through hole (H) provided in the center of the backup table 4 and the frame (1). This lifting device 7 'is composed of a rack (R) and a pinion (covered with a cover and not shown in the drawing), and the pinion is a shaft of a power source (stepping motor; 8'). It is fixed to and forms a single driving device as a whole. Further, at the lower part of the elevating device 7 ', home sensors 11', 12 ', 13', which are involved in the stepwise position control of the backup table 4, are arranged at regular intervals on a vertical line. It is. Here, the sensor 11 'located in the middle is a sensor defining a reference point, and the upper sensor 12' (hereinafter referred to as a rising control sensor) moves the rising position from the reference point, and the lower sensor. 13 '(hereinafter referred to as a lowering control sensor) is a sensor for controlling the lowering position movement from the reference point. In addition, between the reference point sensor 11 'and the lowering control sensor 13', a limit sensor 14 'is provided at the lower end of the rack R to determine limit lines of rising and falling of the backup table 4. The sensors 11 ′ -14 ′ and the stepping motor 8 ′ are electrically connected to the control device 10.

5 is a plan view of the backup table height adjusting apparatus according to the present invention shown in FIG. As shown in the figure, through holes HS formed with threaded tabs for fastening bolts are formed in each corner of the rectangular frame 1, and in the backup table 4, which is stacked on top of each other. One through hole (H) in the center and one side of each through hole (H ') is formed at a predetermined distance from the center to both sides of the center. In addition, a groove H ″ for inserting the backup pin device BP is provided between the through hole H of the center portion and the through hole H ′ of one side. The groove H '' for inserting the backup pin stand BP is not limited to the illustrated one as described above, but is provided in an even distribution over the entire surface of the table 4.

Then, it will be briefly described for the operation of the backup table height adjustment device of the present invention configured as described above.

In the state where the backup pin device BP is inserted into the backup table 4, when a PCB comes to the working position, the control device 10 transmits an initial operation command signal to the stepping motor 8 '. Then, the stepping motor 8 'is rotated, which is converted into linear motion by the pinion and the rack connected to the shaft, and the table fixed shaft connected to the rack is pushed up to raise the table by a predetermined height. Then, the front end of the pin 12 of the backup pin device is inserted into the table in contact with the lower surface of the PCB to support the PCB. Here, the initial operation transmits a command signal corresponding to the control device 10 according to the material and thickness of the PCB, and thus the rotation speed of the stepping motor 8 'is determined.

And, such initial operation is detected by the reference point sensor (11 ') to determine a predetermined reference point, this matter is input to the control device (10). Subsequently, the stepping up and down movement of the backup table 4 is controlled together with the operation of the rising control sensor 12 'and the falling control sensor 13', respectively. As a result, the PCB is supported at various heights, and the work is therefore facilitated.

On the other hand, when the operation is completed, the stepping motor 8 'is reversely rotated by the operation command of the control device 10, and thus the elevating device 7' moves downward in linear motion, and thus the backup table ( 4) is lowered so that the pin 12 of the backup pin device (BP) is lowered away from the PCB. The PCB then proceeds to the next process.

As described above, the backup table height adjusting device according to the present invention is different from the conventional backup table device by a 2-position control pneumatic cylinder, the height of the backup table by the stepping motor and the elevating device connected mechanically It can be adjusted so that, when used in the assembly line, such as the PCB is used a lot will be able to improve the work efficiency significantly compared to the conventional.

Claims (3)

A backup table (4) positioned above the frame (1) and capable of up / down movement, a backup pin device (BP) coupled to an upper surface of the backup table 4 to support the PCB, and the frame (1) A lifting device 7 'positioned at a lower portion of the backup table 4 to raise and lower the backup table 4, and a power source connected to the lifting device 7' to transfer driving force to the lifting device 7 '; 8 '), a sensing device for controlling the position of each step of the elevating device 7', and a control device 10 for transmitting an operation signal to the power source 8 '. Table height adjuster. 2. The back-up table height adjusting device according to claim 1, wherein the elevating autonomous (7 ') comprises a rack (R) and a pinion. 2. The sensor of claim 1, wherein the sensing device is installed at a lower end of the elevating device (7 ') to control a reference point sensor (11') for setting a reference point of the backup table (4), and to raise or lower the table. And a limit sensor 14 'positioned between the reference point sensor 11' and the lower control sensor 13 'to control the rising / falling limit line. Height adjustment device for the backup table, characterized in that there is.