Positioning device applied to stepping conveyor belt

Abstract

The utility model discloses a positioning device applied to a stepping conveyor belt, which relates to a positioning device and comprises a first photoelectric switch, a second photoelectric switch and an encoder. The first optoelectronic switch is fixedly installed on a deceleration point of a side support of the stepping type conveying belt, the second optoelectronic switch is installed on a stop point of the side support of the stepping type conveying belt through a sliding positioning structure, and the encoder is connected with a main transmission shaft of the stepping type conveying belt. The first optoelectronic switch, the second optoelectronic switch and the encoder are all electrically connected with a controller, and the controller is electrically connected with a transmission motor of the stepping conveyor belt through a frequency converter. According to the stepping conveyor belt positioning device, the positioning precision of the stepping conveyor belt is effectively improved, the steady state of inaccurate positioning of the stepping conveyor belt is reduced, and the production effect and quality of products are improved.

Description

Technical Field

[0001] The utility model relates to a positioning device, and more specifically, to a positioning device applied to a stepping conveyor belt. Background Art

[0002] On the stepping conveyor, there are two photoelectric switches installed on its side bracket, one of which is installed at the deceleration point to trigger the positioning and deceleration of the stepping conveyor, and the other is installed at the stop point to trigger the stepping conveyor to stop. When the controller receives the electrical signal from the first photoelectric switch, the frequency converter controls the transmission motor to decelerate; when the controller receives the electrical signal from the other photoelectric switch, the transmission motor stops. It can be seen that the spacing accuracy between the two photoelectric switches directly affects the transmission accuracy of the stepping conveyor. However, in actual applications, after the two photoelectric switches are installed, it is impossible to know whether the spacing between the two photoelectric switches has changed. Only when the error is large enough to directly visually observe the offset between the product and the reference point, can the error between the photoelectric switches be known; or the spacing between the photoelectric switches can be regularly detected. However, this method still cannot promptly know that there is an error between the photoelectric switches. Therefore, it needs to be improved. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a positioning device applied to a stepping conveyor belt in view of the deficiencies of the prior art, so as to effectively improve the positioning accuracy of the stepping conveyor belt.

[0004] The utility model discloses a positioning device applied to a stepping conveyor belt, comprising a first photoelectric switch, a second photoelectric switch and an encoder; the first photoelectric switch is fixedly mounted on a deceleration point of a stepping conveyor belt bracket, the second photoelectric switch is mounted on a stopping point of a side bracket of the stepping conveyor belt through a sliding positioning structure, and the encoder is connected to a main transmission shaft of the stepping conveyor belt; the first photoelectric switch, the second photoelectric switch and the encoder are all electrically connected to a controller, and the controller is electrically connected to a transmission motor of the stepping conveyor belt through a frequency converter.

[0005] Preferably, the first photoelectric switch and the second photoelectric switch are both slot-type photoelectric switches.

[0006] Preferably, a sensor sheet for triggering a slot-type photoelectric switch is fixedly mounted on the belt body of the stepping conveyor belt.

[0007] Preferably, the sliding positioning structure includes an L-shaped plate; the second photoelectric switch is installed on the plate body 1 of the L-shaped plate, and two first long waist-shaped through holes are provided on the horizontal plate of the L-shaped plate, and half-thread bolts are inserted into the first long waist-shaped through holes, and the half-thread bolts are screwed on the side bracket, and a sliding structure is formed between the bolt head of the half-thread bolt and the horizontal plate; a protrusion is fixed on one side of the side bracket, and an adjusting bolt is screwed in the protrusion, and the end of the adjusting bolt is rotatably connected to the plate body 1, and a tension spring is installed between the plate body 1 and the protrusion.

[0008] Preferably, two second long waist-shaped through holes are formed on the plate body 1, and first locking bolts for fixing the second photoelectric switch are inserted into the second long waist-shaped through holes.

[0009] Preferably, a mounting frame is fixedly mounted on the deceleration point of the side bracket, and two third long waist-shaped through holes are provided on the mounting frame, and second locking bolts for fixing the first photoelectric switch are inserted into the third long waist-shaped through holes.

[0010] Beneficial Effects

[0011] The advantage of the utility model is that by jointly monitoring the displacement of the stepping conveyor belt through the encoder installed on the main transmission shaft of the stepping conveyor belt and two photoelectric switches, the positioning accuracy of the stepping conveyor belt can be effectively improved, the steady state of inaccurate positioning of the stepping conveyor belt can be reduced, and the production effect and quality of the product can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the installation structure of the positioning device of the utility model;

[0013] Figure 2 for Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0014] Figure 3 It is a schematic diagram of the top view of the second photoelectric switch installation structure of the utility model;

[0015] Figure 4 Based on Figure 3 Right view of .

[0016] Among them: 1-first photoelectric switch, 2-second photoelectric switch, 3-encoder, 4-main transmission shaft, 5-belt body, 6-sensing sheet, 7-L-shaped plate, 8-semi-thread bolt, 9-bump, 10-adjusting bolt, 11-tension spring, 12-second long waist-shaped through hole, 13-first long waist-shaped through hole, 14-mounting frame, 15-third long waist-shaped through hole. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the embodiments, but does not constitute any limitation to the utility model. Any limited modifications made by anyone within the scope of the claims of the utility model are still within the scope of the claims of the utility model.

[0018] See also Figure 1-Figure 4 The utility model is a positioning device applied to a stepping conveyor belt, comprising a first photoelectric switch 1, a second photoelectric switch 2 and an encoder 3. Among them, the first photoelectric switch 1 and the second photoelectric switch 2 are both slot-type photoelectric switches. A sensing sheet 6 for triggering the slot-type photoelectric switch is fixedly installed on the belt body 5 of the stepping conveyor belt. When the sensing sheet 6 passes through the photoelectric switch, the photoelectric switch is triggered. The first photoelectric switch 1 is fixedly installed at the deceleration point of the side bracket of the stepping conveyor belt, that is, the electrical signal of the first photoelectric switch 1 is used as the trigger signal for deceleration of the stepping conveyor belt. The second photoelectric switch 2 is installed at the stop point of the side bracket of the stepping conveyor belt through a sliding positioning structure, that is, the electrical signal of the second photoelectric switch 2 is used as the trigger signal for stopping the stepping conveyor belt. The encoder 3 is connected to the main transmission shaft 4 of the stepping conveyor belt, and is used to detect the displacement of the stepping conveyor belt. The first photoelectric switch 1, the second photoelectric switch 2 and the encoder 3 are all electrically connected to the controller, and the controller is electrically connected to the driving motor of the stepping conveyor belt through the frequency converter.

[0019] When the feeding manipulator grabs the product from the upstream and puts it on the belt body 5 of the stepping conveyor, the belt body 5 is driven by the transmission motor. In this embodiment, the transmission motor is controlled by a multi-speed inverter. When the induction sheet 6 on the belt body 5 passes through the first photoelectric switch 1, the first photoelectric switch 1 sends an electrical signal to the controller. After receiving the electrical signal, the controller will immediately start the collection of the encoder 3 calculation. Among them, the encoder 3 rotates one circle for 2000 pulses, and accordingly, the belt body moves a distance of 200mm, that is, the movement of the belt body 5 corresponding to each pulse is 0.1mm. At the same time, the controller also generates a control signal to the inverter, so that the inverter changes to a low-speed frequency operation mode to control the transmission motor to run at a low speed, thereby achieving deceleration. If the belt body 5 continues to move 30mm after starting the deceleration of the stepping conveyor and then stops, when the counting pulses of the encoder 3 reach 300, the controller sends a stop signal to the inverter to stop the transmission motor. When the transmission motor stops, the induction sheet 6 should be between the second photoelectric switch 2 to generate an electrical signal. That is, if the controller receives the electrical signal from the second photoelectric switch 2 at this time, it means that the stop position of the belt 5 is accurate. At this time, the robot at the discharge end of the stepping conveyor belt can grab the product from the belt 5 and place it in the downstream equipment; otherwise, the position of the second photoelectric switch 2 needs to be adjusted.

[0020] It should be noted that the above-mentioned stepping conveyor belt, manipulator, upstream / downstream equipment, manipulator and controller that control the transmission motor through the frequency converter are all existing technologies. The introduction of these components and control processes is only to better introduce the use of the positioning device, and the utility model does not improve them.

[0021] In order to facilitate the adjustment of the position of the second photoelectric switch 2 , this embodiment adopts a sliding positioning structure to achieve the installation of the second photoelectric switch 2 .

[0022] Specifically, the sliding positioning structure includes an L-shaped plate 7. The second photoelectric switch 2 is installed on the plate body 1 of the L-shaped plate 7. The plate body 2 of the L-shaped plate 7 is provided with two first long waist-shaped through holes 13. A half-thread bolt 8 is inserted into the first long waist-shaped through hole 13. The half-thread bolt 8 is screwed on the side bracket, and a sliding structure is formed between the bolt head of the half-thread bolt 8 and the plate body 2, so that the L-shaped plate 7 can slide along the center direction of its first long waist-shaped through hole 13, so that the second photoelectric switch 2 is close to or away from the first photoelectric switch 1. A protrusion 9 is fixed on one side of the side bracket, and an adjusting bolt 10 is screwed in the protrusion 9. The end of the adjusting bolt 10 is rotatably connected to the plate body 1, and a tension spring 11 is installed between the plate body 1 and the protrusion 9. When the adjusting bolt 10 is turned, the length of the adjusting bolt 10 between the protrusion 9 and the L-shaped plate 7 changes, so that the position of the L-shaped plate 7 also changes with the change in the length of the adjusting bolt 10, thereby achieving the adjustment of the position of the second photoelectric switch 2. The tension spring 11 can apply a pressing force to the adjusting bolt 10 through the L-shaped plate 7, so that the adjusting bolt 10 is not easily affected by external vibration and does not rotate freely.

[0023] In this embodiment, two second long waist-shaped through holes 12 are formed on the plate body 1, and the first locking bolts for fixing the second photoelectric switch 2 are inserted into the second long waist-shaped through holes 12, so that the height position of the second photoelectric switch 2 can be adjusted. Similarly, a mounting frame 14 is fixedly installed on the deceleration point of the side bracket, and two third long waist-shaped through holes are formed on the mounting frame 14, and the second locking bolts for fixing the first photoelectric switch 1 are inserted into the third long waist-shaped through hole 15, so that the height position of the first photoelectric switch 1 can be adjusted.

[0024] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A positioning device applied to a stepping conveyor belt, characterized in that: The invention comprises a first photoelectric switch (1), a second photoelectric switch (2) and an encoder (3); the first photoelectric switch (1) is fixedly mounted on a deceleration point of a side bracket of a stepping conveyor belt, the second photoelectric switch (2) is mounted on a stop point of the side bracket of the stepping conveyor belt via a sliding positioning structure, and the encoder (3) is connected to a main transmission shaft (4) of the stepping conveyor belt; the first photoelectric switch (1), the second photoelectric switch (2) and the encoder (3) are all electrically connected to a controller, and the controller is electrically connected to a transmission motor of the stepping conveyor belt via a frequency converter.

2. A positioning device for a stepping conveyor belt according to claim 1, characterized in that: The first photoelectric switch (1) and the second photoelectric switch (2) are both slot-type photoelectric switches.

3. A positioning device for a stepping conveyor belt according to claim 2, characterized in that: A sensing sheet (6) for triggering a slot-type photoelectric switch is fixedly mounted on the belt body (5) of the step-by-step conveyor belt.

4. The positioning device applied to a stepping conveyor belt according to claim 1, characterized in that: The sliding positioning structure comprises an L-shaped plate (7) consisting of a plate body 1 and a plate body 2; the second photoelectric switch (2) is mounted on the plate body 1 of the L-shaped plate (7); the plate body 2 of the L-shaped plate (7) is provided with two first long waist-shaped through holes (13); a half-thread bolt (8) is inserted into the first long waist-shaped through hole (13); the half-thread bolt (8) is screwed onto the side bracket, and a sliding structure is formed between the bolt head of the half-thread bolt (8) and the plate body 2; a protrusion (9) is fixed to one side of the side bracket; an adjusting bolt (10) is screwed into the protrusion (9); the end of the adjusting bolt (10) is rotatably connected to the plate body 1; a tension spring (11) is installed between the plate body 1 and the protrusion (9).

5. A positioning device for a stepping conveyor belt according to claim 4, characterized in that: The plate body is provided with two second long waist-shaped through holes (12), and the second long waist-shaped through holes (12) are inserted with first locking bolts for fixing the second photoelectric switch (2).

6. The positioning device for a stepping conveyor belt according to claim 1, characterized in that: A mounting frame (14) is fixedly mounted on the deceleration point of the side bracket, and two third long waist-shaped through holes are provided on the mounting frame (14). A second locking bolt for fixing the first photoelectric switch (1) is inserted into the third long waist-shaped through hole (15).

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