CN113879810B

CN113879810B - Plate conveying device

Info

Publication number: CN113879810B
Application number: CN202010710942.4A
Authority: CN
Inventors: 陈安顺
Original assignee: Group Up Industrial Co ltd
Current assignee: Group Up Industrial Co ltd
Priority date: 2020-07-02
Filing date: 2020-07-22
Publication date: 2023-07-07
Anticipated expiration: 2040-07-22
Also published as: TWI720914B; TW202202431A; CN113879810A

Abstract

A plate conveying device is suitable for receiving a plurality of plates conveyed by a plate frame turnover device and conveying the plates in a direction away from the plate frame turnover device. The plate conveying device comprises a buffer seat unit and a conveying table unit. The buffer seat unit comprises a base, a lifting frame and at least one pressure sensor, wherein the lifting frame is arranged on the base in an up-down movable mode, the pressure sensor is arranged on the lifting frame and is provided with a threshold value, and the threshold value is larger than the weight of one plate and smaller than the weight of two plates. The conveying table unit is connected with a pressure sensor and is suitable for receiving the plate and conveying the plate in a direction away from the plate frame overturning device. When the conveying table unit receives at least one plate, the weight of the plate applies an external force to the pressure sensor, so that the pressure sensor generates a weight reading value, and when the weight reading value exceeds a threshold value, the plate frame overturning device stops operating.

Description

Plate conveying device

Technical Field

The present disclosure relates to plate conveying devices, and particularly to a plate conveying device with a plate protecting function.

Background

In the process of manufacturing the printed circuit board, the printed materials on the circuit board are finally required to be dried through drying operation, in the prior art, before the circuit board is baked, the circuit board is conveyed into an oven by a horizontal conveying device and transferred onto a circularly movable chain wheel transmission mechanism, a plurality of plate frames are arranged at intervals on the chain wheel transmission mechanism, the circuit board can be supported by the chain wheel transmission mechanism in a hanging mode, the circuit board can be driven by the chain wheel transmission mechanism to be baked in the oven, and after baking is finished, the baked circuit board is conveyed to the next station by the horizontal conveying device. However, in the process of transferring the baked circuit boards from the sprocket drive mechanism to the horizontal conveyor, one circuit board may not be smoothly conveyed because of being placed on the horizontal conveyor in a skewed manner, and the next circuit board is immediately transferred to the horizontal conveyor, and at this time, the rack of the sprocket drive mechanism presses the obliquely placed circuit board to damage the circuit board, and even damage to the conveyor may be caused.

Therefore, the conventional plate conveying device with the protection mechanism comprises a buffer seat and a conveying table capable of moving up and down relative to the buffer seat, when the condition that the conveying table is placed askew to the circuit board occurs, the plate frame of the sprocket transmission mechanism presses the askew circuit board and drives the conveying table to move downwards relative to the buffer seat, and touches a micro switch of the buffer seat, and the micro switch is touched to stop the sprocket transmission mechanism, so that the circuit board and the conveying table are prevented from being damaged due to continuous pressing of the plate frame. However, such a protection mechanism is effective only for the protection of the conveying table, and the circuit board is still pressed by the plate frame and displaced downward for a certain distance before the sprocket drive is stopped, and there is still a risk of damage, so there is still room for improvement.

Disclosure of Invention

The invention aims to provide a plate conveying device with a plate protection function.

The plate conveying device is suitable for receiving a plurality of plates conveyed by the plate frame overturning device and conveying the plates in a direction away from the plate frame overturning device, and comprises a buffer seat unit, the lifting frame is arranged on the base in an up-down movable mode, and the pressure sensor is arranged on the lifting frame and is provided with a threshold value which is larger than the weight of one plate and smaller than the weight of two plates; the conveying table unit is connected with the pressure sensor and is suitable for receiving the plate and conveying the plate in a direction away from the plate frame overturning device; when the conveying table unit bears at least one plate, the weight of the plate drives the conveying table unit to move downwards to apply external force to the pressure sensor, so that the pressure sensor generates a weight reading value, and when the weight reading value exceeds the threshold value, the plate frame overturning device stops operating.

The lifting frame is provided with a bottom plate, at least one supporting column connected with the bottom plate and extending upwards, and at least one top plate connected with the top end of the supporting column and fixedly connected with the lower end of the pressure sensor.

The plate conveying device comprises a conveying table unit and a conveying table arranged on the conveying table unit, wherein the conveying table unit comprises a mounting frame body and at least one connecting plate, the mounting frame body is used for arranging the conveying table, and the connecting plate is fixedly connected with the lower ends of the mounting frame body and the pressure sensor and is spaced from the top plate.

The invention relates to a plate conveying device, which comprises a base frame and a buffer frame arranged on the base frame, wherein the buffer frame comprises a buffer frame body and a plurality of abutting plates arranged on the buffer frame body for a supporting column to pass through, and the lifting frame is also provided with a plurality of elastic pieces which are respectively sleeved on the supporting column, and the upper end and the lower end of the elastic pieces are respectively abutted against the abutting plates and the top plate.

The invention relates to a plate conveying device, which comprises a buffer seat unit, a micro switch arranged on the base below a bottom plate, and a convex rib propping against the micro switch formed on the lower surface of the bottom plate.

The invention relates to a plate conveying device, which is characterized in that the buffer frame is also provided with a mounting plate arranged on the buffer frame body, the buffer seat unit also comprises a first sprocket assembly arranged on the mounting plate, a 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 balancing weight fixedly connected with one end of the chain, the first sprocket assembly is provided with at least one rotatable first sprocket, the second sprocket assembly is provided with at least one rotatable second sprocket, and the other end of the chain is fixedly connected with the lower surface of the mounting plate and partially surrounds the first sprocket and the second sprocket.

The invention has the beneficial effects that: by means of the pressure sensor, when the conveying table unit bears at least one plate, the weight of the plate drives the conveying table unit to move downwards to apply external force to the pressure sensor, so that the pressure sensor generates a weight reading value, when the weight reading value exceeds the threshold, the plate frame overturning device stops operating, and the plate and the conveying table unit can be prevented from being damaged by continuous pressing of the plate frame.

Drawings

FIG. 1 is a perspective view of an embodiment of the plate conveying device and a plate rack turnover device of the present invention;

FIG. 2 is a side view of this embodiment;

FIG. 3 is a top view of this embodiment;

fig. 4 is a sectional view taken along section line IV-IV of fig. 3;

FIG. 5 is a partial top view of the embodiment, wherein the transfer table of a transfer table unit and the bottom frame of a base are omitted;

FIG. 6 is a cross-sectional view taken along section line VI-VI of FIG. 5; and

FIG. 7 is a cross-sectional view similar to FIG. 6 illustrating downward displacement of a lift relative to a cushioning frame to actuate a microswitch.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

Referring to fig. 1 to 3, an embodiment of the board conveying device of the present invention is adapted to receive a plurality of boards 2 conveyed by a board rack turnover device 1 and convey the boards 2 in a conveying direction D1 in a direction away from the board rack turnover device 1, and the boards 2 may be, for example, printed circuit boards. The pallet turning device 1 includes a sprocket driving mechanism 11 and a plurality of pallets 12 disposed on the sprocket driving mechanism 11, the pallets 12 are disposed around the sprocket driving mechanism 11 along the conveying direction D1, each pallet 12 includes a mounting arm 121 disposed on the sprocket driving mechanism 11 and extending along the left-right direction D2, a pair of side arms 122 disposed on the mounting arm 121 and extending away from the sprocket driving mechanism 11, and a plurality of pairs of supporting members 123 disposed on the side arms 122 at intervals and extending in opposite directions to support the plate 2, that is, each pair of supporting members 123 is disposed on the side arms 122 and extends in opposite directions. The sprocket drive 11 drives the plate frame 12 to move up and down circularly. Wherein the pallet inverting device 1 is shown only partly as an illustration. The plate conveying device comprises a buffer seat unit 3 and a conveying table unit 4.

Referring to fig. 3 to 5, the buffer seat unit 3 includes a base 31, a lifting frame 32 movably disposed on the base 31 along a vertical direction D3, four pressure sensors 33 disposed on the lifting frame 32, a micro switch 34 disposed on the base 31, a first sprocket assembly 35 disposed on the base 31, a second sprocket assembly 36 disposed on the lifting frame 32, two chains 37 connecting the first sprocket assembly 35 and the second sprocket assembly 36, and a weight 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 may be, for example, but not limited to, a cubic frame. The buffer frame 312 is a square planar frame, and includes a buffer frame 312a, two abutting plates 312b disposed on the buffer frame 312a at intervals and extending along the left-right direction D2, and a mounting plate 312c disposed on the buffer frame 312a and extending along the left-right direction D2 between the abutting plates 312 b. The lifting frame 32 has a bottom plate 321, four supporting columns 322 connected to the bottom plate 321 and extending upwards, each of which passes through the supporting plate 312b, two top plates 323 respectively connected to the top ends of the supporting columns 322 and fixedly connected to the lower ends of the pressure sensors 33, and four elastic members 324 respectively sleeved on the supporting columns 322, wherein the upper ends and the lower ends of the elastic members respectively abut against the supporting plates 312b and the top plates 323. The bottom plate 321 has an elongated rib 321a formed on the bottom surface thereof. Each pressure sensor 33 may be, for example, a Load Cell (Load Cell), which generates a weight reading when subjected to an external force, the magnitude of which can be measured, and the pressure sensor 33 is provided with a threshold value that is greater than the weight of one plate 2 and less than the weight of two plates 2. The micro switch 34 is disposed below the buffer frame 312a and abuts against a rib 321a 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 disposed on the mounting plate 312c at intervals along the left-right direction D2, a first rotating shaft 352 rotatably penetrating the first bearing seats 351, 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 seats 361 disposed on the bottom plate 321 at intervals along the left-right direction D2, a second rotating shaft 362 rotatably passing through the second bearing seats 361, and a pair of second sprockets 363 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, except for the location of placement. The other end of the chain 37 is fixedly connected to the lower surface of the mounting plate 312c and partially surrounds the first sprocket 353 and the second sprocket 363.

The number of the pressure sensors 33 and the support columns 322 is not limited to four, but may be at least one in other embodiments. The number of the abutting plates 312b is not limited to two, and may be at least one in other embodiments. The number of the first bearing seats 351, the first sprockets 353 and the chains 37 of the first sprocket assembly 35 is not limited to two, and other numbers may be used in other embodiments, as long as at least one is used, and the second sprocket assembly 36 is also used.

Referring to fig. 3 to 5, the conveying table unit 4 is adapted to receive the board 2 and convey the board 2 away from the board rack turnover device 1, and includes a mounting frame 41, a conveying table 42 disposed on the mounting frame 41, and four sensing members 43 disposed on the conveying table 42. The mounting frame 41 has a mounting frame 410 for the conveying table 42, two connecting plates 411 fixedly connected to the mounting 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, the distance between the two connecting plates is smaller than the distance between the top plates 323, and each two pressure sensors 33 are respectively connected to the top plate 323 and the connecting plates 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 cover plate 423 disposed between the first conveying belts 421 and the second conveying belts 422. The first conveyor 421 is adjacent to the sprocket drive 11 and the second conveyor 422 is further from the sprocket drive 11. The width of the whole first conveyor belt 421 (i.e. the distance between the outer edges of the first conveyor belt 421) is smaller than the distance between the side arms 122 of the rack 12 to avoid interference with the rack 12, and the width of the whole second conveyor belt 422 (i.e. the distance between the outer edges of the second conveyor belt 422) is larger than the width of the whole first conveyor belt 421 and slightly larger than the width of the plate 2, so that the plate 2 can be smoothly moved and the plate 2 can be prevented from being skewed because both sides can be supported during the conveying process. The cover plate 423 is formed with four openings 424 corresponding to the sensing members 43, and the sensing members 43 can detect whether the plate 2 passes over the openings, so as to ensure that the conveying process of the plate 2 is not abnormal. The number of the connection plates 411 is not limited to two, and may be at least one in other embodiments.

The following describes a protection mechanism of the plate conveying device of the present invention: referring to fig. 4, 6 and 7, when the conveying table 42 of the conveying table unit 4 receives at least one plate 2, the weight of the plate 2 drives the conveying table unit 4 to displace downward to apply an external force to the pressure sensor 33, so that the pressure sensor 33 generates a weight reading value, and when the weight reading value exceeds the threshold value, the plate frame turning device 1 stops operating. Taking a normal plate 2 transport process as an example, the transport table unit 4 only receives a single plate 2 and transports it to the next station, where the weight reading of the pressure sensor 33 does not exceed the threshold value, and the sprocket drive 11 and the transport table 42 continue to operate as usual. On the contrary, if the plate 2 is placed on the conveying table 42 in a skew manner during the process of transferring from the sprocket driving mechanism 11 to the conveying table 42, and the next plate 2 is to be transferred to the plate 2 placed on the conveying table 42 in a skew manner, the plate 2 placed in a skew manner is additionally subjected to the downward pressing force of the plate frame 12, so that the weight reading value of the pressure sensor 33 is increased, and once the weight reading value exceeds the threshold value, the plate frame turning device 1 stops operating, so as to prevent the plate 2 and the conveying table 42 from being damaged due to continuous pressing of the plate frame 12. The above is the first protection mechanism, because the threshold is set in the range of more than the weight of one plate 2 and less than the weight of two plates 2, and the mechanism that can quickly respond to start-up and shutdown once the external force is increased can be used for protecting the plates 2. The cooperation among the lifting frame 32, the micro-switch 34, the first sprocket assembly 35, the second sprocket assembly 36, the chain 37 and the weight 38 is a second protection mechanism, and the abnormal situation of the askew placement of the plate 2 is also described, when the askew placement of the plate 2 is pressed by the plate frame 12, the pressure sensor 33 will displace downward along with the mounting frame 41 of the conveying table unit 4, and drive the top plate 323 of the lifting frame 32, the support column 322, the bottom plate 321 and the second sprocket assembly 36 to displace downward, at this moment, the weight 38 will displace upward due to the downward force of the second sprocket assembly 36 driving the chain 37, the rib 321a of the bottom plate 321 will trigger the micro-switch 34, and the plate frame turning device 1 will stop operating, so as to prevent the plate 2 and the conveying table 42 from being continuously pressed by the plate frame 12 and damaged, as a second protection mechanism. When the abnormal situation is eliminated, the elastic member 324 is pushed against the top plate 323 and the pressure sensor 33 by the compressed elastic restoring force, and the mounting frame 41 and the conveying table 42 are restored upwards.

In summary, in the plate conveying device of the present invention, the pressure sensor 33 is provided with a threshold value, when the conveying table unit 4 receives at least one plate 2, the weight of the plate 2 drives the conveying table unit 4 to displace downward to apply an external force to the pressure sensor 33, so that the pressure sensor 33 generates a weight reading value, and when the weight reading value exceeds the threshold value, the plate frame turning device 1 stops operating, so that the plate 2 and the conveying table unit 4 can be prevented from being damaged due to continuous pressing of the plate frame 12, and the purpose of the present invention can be achieved.

However, the foregoing is merely illustrative of the present invention and, as such, it is not intended to limit the scope of the invention, but rather to cover all modifications and variations within the spirit and scope of the present invention as defined by the appended claims and their equivalents.

Claims

1. A board conveying device which is suitable for receiving a plurality of boards conveyed by the board frame overturning device and conveying the boards in a direction away from the board frame overturning device; the plate conveying device is characterized by comprising:

the buffer seat unit comprises a base, a lifting frame and at least one pressure sensor, wherein the lifting frame is arranged on the base in an up-down movable way, the pressure sensor is arranged on the lifting frame and is provided with a threshold value, the threshold value is larger than the weight of one plate and smaller than the weight of two plates, the lifting frame is provided with a bottom plate, at least one supporting column connected with the upward extension of the bottom plate and at least one top plate connected with the top end of the supporting column and fixedly connected with the lower end of the pressure sensor; and

The conveying table unit is connected with the pressure sensor and is suitable for receiving the plate and conveying the plate in a direction away from the plate frame overturning device, and comprises a mounting frame and a conveying table arranged on the mounting frame, wherein the mounting frame is provided with a mounting frame body for the conveying table to be arranged and at least one connecting plate fixedly connected with the lower ends of the mounting frame body and the pressure sensor and separated from the top plate;

the base comprises a bottom frame and a buffer frame arranged on the bottom frame, wherein the buffer frame comprises a buffer frame body and a plurality of abutting plates arranged on the buffer frame body and used for the supporting column to pass through, the lifting frame is also provided with a plurality of elastic pieces which are respectively sleeved on the supporting column, the upper ends and the lower ends of the elastic pieces are respectively abutted against the abutting plates and the top plate, when the conveying table unit bears at least one plate, the weight of the plate drives the conveying table unit to downwards displace so as to apply external force to the pressure sensor, so that the pressure sensor generates a weight reading value, and when the weight reading value exceeds the threshold value, the plate frame overturning device stops operating.

2. The board conveying device according to claim 1, wherein: the buffer seat unit also comprises a micro switch arranged on the base below the bottom plate, and a convex rib propping against the micro switch is formed on the lower surface of the bottom plate.

3. The board conveying device according to claim 1, wherein: the buffer frame is also provided with a mounting plate arranged on the buffer frame body, the buffer seat unit also comprises a first sprocket assembly arranged on the mounting plate, a second sprocket assembly arranged on the bottom plate of the lifting frame, at least one chain for connecting the first sprocket assembly and the second sprocket assembly, and a balancing weight fixedly connected with one end of the chain, wherein the first sprocket assembly is provided with at least one rotatable first sprocket, the second sprocket assembly is provided with at least one rotatable second sprocket, and the other end of the chain is fixedly connected with the lower surface of the mounting plate and partially surrounds the first sprocket and the second sprocket.