CN113879810B - Plate conveying device - Google Patents

Abstract

A plate conveying device is suitable for receiving a plurality of plates transported by the plate rack turning device and transporting the plates in a direction away from the plate rack turning device. The plate conveying device includes a buffer seat unit and a conveying platform unit. The buffer seat unit includes a base, a lifting frame that can be moved up and down on the base, and at least one pressure sensor that is set on the lifting frame. weight. The conveying table unit is connected with a pressure sensor and is suitable for receiving the board and conveying the board away from the rack turning device. When the conveyor unit accepts at least one board, the weight of the board will exert an external force on the pressure sensor, so that the pressure sensor will generate a weight reading. When the weight reading exceeds a threshold, the board rack turning device will stop operating.

Description

Plate conveying device

technical field

The invention relates to a panel conveying device, in particular to a panel conveying device with a panel protection function.

Background technique

In the process of making printed circuit boards, it is ultimately necessary to dry the printed materials on the circuit boards through drying operations. In the current existing technology, the circuit boards are transported to the In the oven and transferred to a cyclically movable sprocket transmission mechanism, the sprocket transmission mechanism is provided with a plurality of plate racks at intervals to support the circuit board, so that the circuit board can be driven by the sprocket transmission mechanism in the oven in a hanging form The baking operation is carried out. After the baking is completed, the baked circuit board is also transported to the next station by a horizontal conveying device. However, during the process of transferring the baked circuit boards from the sprocket drive mechanism to the horizontal conveying device, one of the circuit boards may not be transported smoothly due to being placed obliquely on the horizontal conveying device. A circuit board will be transferred to the horizontal conveying device immediately afterward. At this time, the plate frame of the sprocket drive mechanism will press the circuit board placed obliquely and cause damage to the circuit board, and may even cause damage to the conveying device.

Therefore, an existing plate conveying device with a protective mechanism includes a buffer seat and a conveying platform that can move up and down relative to the buffer seat. When the plate frame of the mechanism is pressed against the obliquely placed circuit board, it will drive the conveying platform to move downward relative to the buffer seat, and touch a micro switch of the buffer seat. After the micro switch is touched, the sprocket will drive The mechanism stops working, thereby preventing the circuit board and the conveying table from being continuously pressed by the plate frame and being damaged. However, such a protection mechanism is only effective for the protection of the conveyor platform. The circuit board is still pressed by the plate frame and displaced downward for a certain distance before the sprocket drive mechanism stops, and there is still a risk of damage, so there is still room for improvement.

Contents of the invention

The object of the present invention is to provide a plate conveying device with a plate protection function.

The plate conveying device of the present invention is suitable for receiving a plurality of plates transported by the pallet turning device and conveying the plates in a direction away from the pallet turning device, the plate conveying device comprises a buffer seat unit, including a base 1. An elevating frame that can be moved up and down on the base, and at least one pressure sensor installed on the elevating frame, the pressure sensor is provided with a threshold value, the threshold value is greater than the weight of one board and less than the weight of two boards; and a conveying unit, connected to the pressure sensor, suitable for receiving the plate and conveying the plate in a direction away from the rack turning device; when the conveying unit accepts at least one plate, the The weight will drive the conveyor unit to move downwards and apply an external force to the pressure sensor, so that the pressure sensor will generate a weight reading value. When the weight reading value exceeds the threshold value, the pallet turning device will stop working.

According to the panel conveying device of the present invention, the lifting frame has a bottom plate, at least one support column connected to the bottom plate extending upward, and at least one top plate connected to the top of the support column and fixedly connected to the lower end of the pressure sensor.

In the panel conveying device of the present invention, the conveying platform unit includes an installation frame and a conveying platform arranged on the installation frame, and the installation frame has an installation frame for the conveying platform and at least one frame fixed to the installation frame and a connecting plate at the lower end of the pressure sensor and spaced from the top plate.

In the plate conveying device of the present invention, the base includes a bottom frame and a buffer frame arranged on the bottom frame, the buffer frame includes a buffer frame body and a plurality of buffer frames arranged on the buffer frame body for the support columns to pass through The abutment plate, the lifting frame also has a plurality of elastic members respectively sleeved on the support column, and the upper and lower ends respectively abut the abutment plate and the top plate.

According to the panel conveying device of the present invention, the buffer seat unit further includes a micro switch disposed on the base below the bottom plate, and a convex rib against the micro switch is formed on the lower surface of the bottom plate.

In the plate conveying device according to the present invention, the buffer frame also has a mounting plate arranged on the buffer frame body, and the buffer seat unit also includes a first sprocket assembly arranged on the mounting plate, and a The second sprocket assembly of the bottom plate, at least one chain connecting the first sprocket assembly and the second sprocket assembly, and a counterweight fixed to one end of the chain, the first sprocket assembly has at least one rotatable first sprocket assembly A sprocket, the second sprocket assembly has at least one rotatable second sprocket, the other end of the chain is fixedly connected to the lower surface of the installation plate and partially surrounds the first sprocket and the second sprocket.

The beneficial effect of the present invention is that: with the pressure sensor having a threshold value, when the conveying platform unit receives at least one plate, the weight of the plate will drive the conveying platform unit to move downward and exert an external force on the pressure sensor, Make the pressure sensor generate a weight reading value, and when the weight reading value exceeds the threshold value, the pallet turning device stops operating, which can prevent boards and the conveying unit from being continuously pressed by the pallet and being damaged.

Description of drawings

Fig. 1 is a perspective view of an embodiment of the plate conveying device and a plate frame turning device of the present invention;

Fig. 2 is the side view of this embodiment;

Fig. 3 is the top view of this embodiment;

Fig. 4 is the sectional view obtained by section line IV-IV of Fig. 3;

Fig. 5 is a partial top view of this embodiment, wherein a conveying platform of a conveying platform unit and a bottom frame of a base are omitted;

Figure 6 is a sectional view drawn from the section line VI-VI of Figure 5; and

Fig. 7 is a cross-sectional view similar to Fig. 6, illustrating that a downward displacement of a crane relative to a buffer frame has triggered a micro switch.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

Referring to FIGS. 1 to 3 , an embodiment of the board conveying device of the present invention is suitable for receiving a plurality of boards 2 transported by a rack turning device 1 and moving the boards 2 away from the board in the conveying direction D1. The direction of the pallet turning device 1 is conveyed, and the board 2 can be, for example, a printed circuit board. The pallet turning device 1 includes a sprocket transmission mechanism 11 and a plurality of pallets 12 arranged on the sprocket transmission mechanism 11, and the pallets 12 are arranged up and down on the sprocket transmission mechanism along the conveying direction D1 11. Each plate frame 12 includes a mounting arm 121 disposed on the sprocket transmission mechanism 11 and extending along the left-right direction D2, a pair of mounting arms 121 respectively disposed on the mounting arm 121 and extending away from the sprocket transmission mechanism 11. The side arms 122 and multiple pairs of support members 123 arranged at intervals on the side arms 122 and extending towards each other to support the panel 2, that is to say, each pair of support members 123 are respectively arranged on the side arms 122 and face each other. extend. The sprocket transmission mechanism 11 can drive the plate frame 12 to move circularly up and down. Wherein, only a part of the rack turning device 1 is shown as a schematic. The plate conveying device includes a buffer seat unit 3 and a conveying table unit 4 .

3 to 5, the buffer seat unit 3 includes a base 31, a lifting frame 32 that can be movably arranged on the base 31 along the up and down direction D3, and four pressure sensors 33 arranged on the lifting frame 32 , a micro switch 34 arranged on the base 31, a first sprocket assembly 35 arranged on the base 31, a second sprocket assembly 36 arranged on the lifting frame 32, two connecting the first The chain 37 of the sprocket assembly 35 and the second sprocket assembly 36 and a counterweight 38 fixedly connected to one end of the chain 37 . The base 31 includes a bottom frame 311 and a buffer frame 312 disposed on the bottom frame 311 . The bottom frame 311 can be, for example, a cube frame but not limited thereto. The buffer frame 312 is a square-shaped plane frame, which includes a buffer frame 312a, two abutment plates 312b disposed on the buffer frame 312a at intervals and extending along the left-right direction D2, and a buffer frame 312b arranged on the buffer frame. The mounting plate 312c extending along the left-right direction D2 is located between the abutting plates 312b on the mounting plate 312a. The lifting frame 32 has a bottom plate 321, four support columns 322 connected to the bottom plate 321 extending upwards and passing through the abutting plate 312b two by two, respectively, and two support columns 322 connected to the tops of the support columns 322 and fixed to the pressure sensor. The top plate 323 at the lower end of 33 and the four elastic members 324 respectively sleeved on the support column 322 and abutted against the abutting plate 312b and the top plate 323 at the upper and lower ends respectively. A strip-shaped rib 321a is formed on the lower surface of the bottom plate 321 . Each pressure sensor 33 can be, for example, a load cell (LoadCell), which will generate a weight reading when it is subjected to an external force, and can measure the size of the external force. The pressure sensor 33 is provided with a threshold, which is greater than a plate 2 The weight and less than the weight of two boards 2. The micro switch 34 is disposed on the buffer frame 312 a and is located below the bottom plate 321 and abuts against the rib 321 a of the bottom plate 321 , and its function will be described later. The first sprocket assembly 35 is disposed on the mounting plate 312c and has a pair of first bearing seats 351 spaced along the left-right direction D2 on the mounting plate 312c, and a first bearing seat 351 rotatably passing through the first bearing seat. 351 includes a first rotating shaft 352 and a pair of first sprockets 353 sleeved on the first rotating shaft 352 at intervals along the left-right direction D2. The second sprocket assembly 36 is disposed on the bottom plate 321 below the mounting plate 312c, and has a pair of second bearing housings 361 spaced apart along the left-right direction D2 on the bottom plate 321, and a rotatably penetrated second bearing seat 361. The second rotating shaft 362 of the second bearing seat 361 and a pair of second sprockets 363 are sleeved on the second rotating shaft 362 at intervals along the left-right direction D2. The second sprocket assembly 36 has the same components as the first sprocket assembly 35, only the setting positions are different. The other end of the chain 37 is fixed to the lower surface of the mounting plate 312c and partially surrounds the first sprocket 353 and the second sprocket 363 .

Wherein, the number of the pressure sensor 33 and the support column 322 is not limited to four, and may be other numbers in other embodiments, as long as there is at least one. The number of the abutting plates 312b is not limited to two, and in other embodiments, there may be other numbers as long as there is at least one. The number of the first bearing seat 351, the first sprocket 353 and the chain 37 of the first sprocket assembly 35 is not limited to two, and in other embodiments, it can also be other numbers, as long as it is at least one. , the second sprocket assembly 36 is also the same.

Referring to Fig. 3 to Fig. 5, the delivery platform unit 4 is suitable for receiving the panel 2 and transporting the panel 2 in a direction away from the rack turning device 1, and includes an installation frame 41, a A conveying platform 42 on the frame 41 and four sensing elements 43 disposed on the conveying platform 42 . The installation frame 41 has an installation frame 410 for the delivery platform 42 and two connecting plates 411 affixed to the installation frame 410 and the lower end of the pressure sensor 33 extending along the left-right direction D2 and spaced from the top plate 323 , the connecting plates 411 are arranged at intervals in the conveying direction D1 and the distance between them is smaller than the distance between the top plates 323 , and every two pressure sensors 33 are respectively connected to the top plate 323 and the connecting plate 411 . The conveying table 42 extends along the conveying direction D1, and has a pair of first conveying belts 421, a pair of second conveying belts 422, and a pair of conveyor belts 421 and 422. The cover plate 423. The first conveyor belt 421 is adjacent to the sprocket transmission mechanism 11 , and the second conveyor belt 422 is farther away from the sprocket transmission mechanism 11 . The overall width of the first conveyor belt 421 (that is, the distance between the outer edges of the first conveyor belt 421 ) is smaller than the distance between the side arms 122 of the pallet 12 to avoid contact with the pallet 12 Interference, the overall width of the second conveyor belt 422 (that is, the distance between the outer edges of the second conveyor belt 422) is greater than the overall width of the first conveyor belt 421 and slightly greater than the width of the plate 2, so that The plate 2 can move smoothly and prevent the plate 2 from being skewed because both sides can be supported during the conveying process. The cover plate 423 is formed with four openings 424 whose positions correspond to the sensing element 43, and the sensing element 43 can detect whether the plate 2 passes above it, so as to ensure that the conveying process of the plate 2 is normal. . Wherein, the number of connecting boards 411 is not limited to two, and may also be other numbers in other embodiments, as long as there is at least one.

The protection mechanism of the plate conveying device of the present invention is described below: referring to Fig. 4, Fig. 6 and Fig. 7, when the conveying platform 42 of the conveying platform unit 4 accepts at least one plate 2, the weight of the plate 2 will drive The conveyer unit 4 moves downward to apply an external force to the pressure sensor 33, so that the pressure sensor 33 generates a weight reading, and when the weight reading exceeds the threshold, the rack turning device 1 stops working. Taking the normal panel 2 conveying process as an example, the conveyor unit 4 will only accept a single panel 2 and transport it to the next station. At this time, the weight reading of the pressure sensor 33 does not exceed the threshold, and the chain The wheel drive mechanism 11 and the delivery platform 42 continue to operate as usual. On the contrary, if the plate 2 is placed on the conveying platform 42 obliquely in the process of being transferred from the sprocket drive mechanism 11 to the conveying platform 42, resulting in the situation that it cannot be smoothly conveyed, and the next plate 2 is followed by To be transferred to the plate 2 placed obliquely on the delivery table 42, the plate 2 placed obliquely will be additionally subjected to the downward pressing force of the plate frame 12, so that the weight reading value of the pressure sensor 33 will rise. Once the weight When the reading value exceeds the threshold value, the rack turning device 1 will stop operating to prevent the plate 2 and the conveying table 42 from being continuously pressed by the rack 12 and being damaged. The above is the first protection mechanism, because the threshold is set within the range greater than the weight of one panel 2 and less than the weight of two panels 2, once the external force increases, it can quickly respond to the mechanism of starting and stopping in time, The protection effect for the panel 2 is better. The cooperation between the lifting frame 32, the micro switch 34, the first sprocket assembly 35, the second sprocket assembly 36, the chain 37 and the counterweight 38 is the second protection mechanism. The abnormal situation of placement is explained. When the plate 2 placed obliquely receives the downward pressing force of the plate frame 12, the pressure sensor 33 will move downward along with the installation frame 41 of the conveyor unit 4, and drive the lifting frame The top plate 323 of 32, the support column 322, the bottom plate 321 and the second sprocket assembly 36 are displaced downwards. At this time, the counterweight 38 will be displaced upward by the force that the second sprocket assembly 36 drives the chain 37 downward. The convex rib 321a of the bottom plate 321 will touch the micro switch 34, which can also stop the rack turning device 1, so as to prevent the plate 2 and the conveying table 42 from being continuously pressed by the rack 12 and being damaged, as a second protection mechanism. When the abnormal condition is eliminated, the elastic member 324 will push against the top plate 323 and the pressure sensor 33 together with the installation frame 41 and the conveying table 42 to reset upward due to the compressed elastic recovery force.

To sum up, the plate conveying device of the present invention is provided with a threshold value by means of the pressure sensor 33. When the conveying table unit 4 accepts at least one plate 2, the weight of the plate 2 will drive the conveying table unit 4 downward. Displacement and apply an external force to the pressure sensor 33, so that the pressure sensor 33 produces a weight reading value. When the weight reading value exceeds the threshold value, the pallet turning device 1 will stop operating, which can prevent the plate 2 and the conveying The table unit 4 is damaged by the continuous pressing of the pallet 12, so the purpose of the present invention can be really achieved.

But the above-mentioned ones are only embodiments of the present invention, and should not limit the scope of the present invention. All simple equivalent changes and modifications made according to the claims of the present invention and the contents of the description are still within the scope of this invention. within the scope of the invention.

Claims (3)

1. A board conveying device, which is suitable for receiving a plurality of boards transmitted by the rack turning device and conveying the boards in a direction away from the rack turning device; it is characterized in that the board conveying device includes : The buffer seat unit includes a base, a lifting frame that can be moved up and down on the base, and at least one pressure sensor set on the lifting frame. The pressure sensor is provided with a threshold value that is greater than the weight of a plate and less than The weight of two plates, the lifting frame has a bottom plate, at least one support column connected to the bottom plate extending upward, and at least one top plate connected to the top of the support column and fixedly connected to the lower end of the pressure sensor; and a conveying unit, connected to the pressure sensor, adapted to receive the plate and transport the plate in a direction away from the rack turning device, the conveying unit includes a mounting frame and a conveying table arranged on the mounting frame , the installation frame has an installation frame for the conveying platform and at least one connecting plate fixedly connected to the installation frame and the lower end of the pressure sensor and spaced from the top plate; The base includes a bottom frame and a buffer frame arranged on the bottom frame, the buffer frame includes a buffer frame body and a plurality of abutment plates arranged on the buffer frame body for the support columns to pass through, and the lifting frame also has A plurality of elastic parts respectively sleeved on the support column and whose upper and lower ends are respectively abutted against the abutment plate and the top plate, when the conveying platform unit accepts at least one plate, the weight of the plate will drive the conveying platform The unit moves downwards to apply an external force to the pressure sensor, so that the pressure sensor generates a weight reading, and when the weight reading exceeds the threshold, the rack turning device stops working. 2. The plate conveying device according to claim 1, wherein the buffer seat unit further comprises a micro switch disposed on the base below the bottom plate, and a bottom surface of the bottom plate is formed to abut against the micro switch. ribs. 3. The panel conveying device according to claim 1, wherein the buffer frame also has a mounting plate disposed on the buffer frame body, and the buffer seat unit further includes a first sprocket disposed on the mounting plate component, the second sprocket assembly arranged on the bottom plate of the lifting frame, at least one chain connecting the first sprocket assembly and the second sprocket assembly and a counterweight fixed to one end of the chain, the first sprocket The assembly has at least one rotatable first sprocket, the second sprocket assembly has at least one rotatable second sprocket, the other end of the chain is fixed to the lower surface of the mounting plate and partially surrounds the first sprocket and the second sprocket.

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