Tray conveying mechanism with tray stacking sequence recognition function

Abstract

The utility model discloses a tray conveying mechanism with a tray stacking sequence recognition function. The tray conveying mechanism comprises a roller conveying line, a recognition device and a tray stacking machine. The recognition device comprises a mounting bracket and a plurality of limiting switches; the roller conveying line comprises a plurality of conveying rollers and extends in the front-back direction. The tray stacking rack is arranged above the roller conveying line; the side edge, close to the roller conveying line, of the installation support is vertically installed, and the installation support is located in front of the operation of the tray stacking machine. The plurality of limiting switches are mounted on the rear end surface of the mounting bracket at intervals up and down; the trigger end of the limit switch is arranged backwards; the trigger end of the limiting switch is used for making contact with the front end face of a first tray or a second tray stacked in the tray stack. The limiting switch is further used for being in signal connection with a control device for controlling the roller conveying line to operate. The stacking sequence of the trays can be recognized through cooperation of the multiple limiting switches and the control system, the trays with the wrong stacking sequence are prevented from being stacked and conveyed to a production line, and production accidents are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of pallet transport equipment, in particular to a pallet transport mechanism with a pallet stacking sequence recognition function. Background Art

[0002] The automated production line for boxed fresh milk uses a robot to palletize the packaged fresh milk cartons on pallets.

[0003] There are two palletizing stations on both sides of a robot. The two pallets use pallets of two different sizes to stack the fresh milk cartons output by the two production lines.

[0004] If the stacking order of two sizes of pallets delivered to the production line is incorrect, the stacked fresh milk cartons may exceed the edge of the pallet or even fall off the pallet, which is commonly known as "milk drop" in the industry.

[0005] Once a production accident of "milk drop" occurs, it will not only affect the safety and quality of the product, but also cause failure of the equipment that transports the product, affecting the operational stability and efficiency of the production line. Utility Model Content

[0006] In view of the above-mentioned shortcomings, the purpose of the present invention is to provide a pallet transport mechanism with a pallet stacking order recognition function to solve the problem of errors in the stacking order of pallets delivered to the production line.

[0007] To achieve this purpose, the present invention adopts the following technical solutions:

[0008] A pallet transport mechanism with a pallet stacking order recognition function, comprising a roller conveyor line, an identification device and a pallet stacking machine;

[0009] The identification device includes a mounting bracket and a plurality of limit switches;

[0010] The roller conveyor line includes a plurality of conveyor rollers, and the roller conveyor line extends in a front-to-rear direction; the pallet stacking machine frame is installed above the roller conveyor line; the mounting bracket is vertically installed near the side of the roller conveyor line, and the mounting bracket is located in front of the operation of the pallet stacking machine; a plurality of limit switches are installed on the rear end surface of the mounting bracket at intervals above and below; the trigger end of the limit switch is arranged to face rearward;

[0011] The trigger end of the limit switch is used to contact the front end surface of the first pallet or the second pallet stacked in the pallet stack; the limit switch is also used to connect the signal of the control device that controls the operation of the roller conveyor line.

[0012] Specifically, the pallet stacking machine includes a mounting frame, a lifting device, two lifting plates and two telescopic fork arms;

[0013] The mounting frame is mounted on the top surface of the roller conveyor line; the two lifting plates are respectively suspended on the left and right sides of the mounting frame; the two telescopic fork arms are respectively mounted on the two lifting plates, and the two telescopic fork arms are located in the same horizontal plane and opposite to each other on the left and right sides; the lifting device is mounted on the top of the mounting frame;

[0014] The lifting device is used to drive the two lifting plates to move up and down synchronously;

[0015] The telescopic fork arm is used to extend into a slot at the bottom of the first pallet or the second pallet.

[0016] Furthermore, the tray stacking machine is also equipped with a proximity sensor group;

[0017] The proximity sensor group includes a first proximity sensor, a second proximity sensor and a third proximity sensor;

[0018] The first proximity sensor, the second proximity sensor, and the third proximity sensor are arranged in sequence from top to bottom and are installed on a side of the left column or the right column of the mounting frame facing the telescopic fork arm; the third proximity sensor is close to the top surface of the roller conveyor line;

[0019] The first proximity sensor, the second proximity sensor and the third proximity sensor are respectively connected to a control device for controlling the operation of the lifting device and the two telescopic fork arms by signal;

[0020] The positions of the first proximity sensor, the second proximity sensor and the third proximity sensor are respectively defined as a lifting stop position, a fork arm retracting position and a fork arm extending position;

[0021] When the telescopic fork arm rises and is located at the raising stop position, the first proximity sensor is triggered;

[0022] When the telescopic fork arm descends and is located at the fork arm retraction position, the second proximity sensor is triggered;

[0023] When the telescopic fork arm descends and is located at the fork arm extending position, the third proximity sensor is triggered.

[0024] Preferably, the distance between the first proximity sensor and the third proximity sensor is not less than the height of either the first tray or the second tray.

[0025] Furthermore, the tray stacking machine is also equipped with a photoelectric sensor;

[0026] The photoelectric sensor is mounted on a side of the left column or the right column of the mounting frame facing the telescopic fork arm, and the photoelectric sensor is located above the first proximity sensor; the light emitting end of the photoelectric sensor extends horizontally and faces the other right column or the other left column of the mounting frame diagonally opposite;

[0027] The photoelectric sensor is used to detect whether the height of the pallet stack reaches the set stacking height, and is connected to the control device that controls the operation of the lifting device and the two telescopic fork arms by signal.

[0028] Furthermore, the first pallet and the second pallet in the pallet stack are both placed in the center, the length and width of the first pallet are respectively smaller than the length and width of the second pallet, the front end surface of the second pallet is exposed in front of the first pallet, and the front end surface of the first pallet is recessed in the front end surface of the pallet stack.

[0029] The technical solution of a pallet transport mechanism with a pallet stacking order recognition function proposed by the present invention has the following beneficial effects: the recognition device includes a mounting bracket and multiple limit switches, and the multiple limit switches and the control system can be used to identify the stacking order of pallets in the pallet stack, thereby preventing pallet stacks with incorrect pallet stacking order from being transported to the production line, thereby avoiding the occurrence of production accidents caused by this. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a structural schematic diagram of an embodiment of a pallet transport mechanism with a pallet stacking order recognition function according to the present invention;

[0031] Figure 2 for Figure 1 An enlarged view of part A in FIG;

[0032] Figure 3 for Figure 1 An enlarged view of part B in FIG;

[0033] Among them: roller conveyor line 1; identification device 2; pallet stacker 3; pallet stacker 6; mounting bracket 21; limit switch 22; mounting frame 31; telescopic fork arm 32; proximity sensor group 33; photoelectric sensor 34; lifting device 35; lifting plate 36; first pallet 61; second pallet 62; first proximity sensor 331; second proximity sensor 332; third proximity sensor 333. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-3 The technical solution of the utility model is further illustrated through specific implementation methods.

[0035] The accompanying drawings are for illustrative purposes only and are not to be construed as limitations on this patent. To better illustrate this embodiment, some components of the accompanying drawings may be omitted, enlarged, or reduced in size, and do not represent the actual dimensions of the product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted from the accompanying drawings.

[0036] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "mounted" and "connected" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium, which can be said to be the internal communication between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood by those skilled in the art in specific circumstances.

[0037] A pallet transport mechanism with a pallet stacking order recognition function comprises a roller conveyor line 1, an identification device 2 and a pallet stacking machine 3;

[0038] The identification device 2 includes a mounting bracket 21 and a plurality of limit switches 22;

[0039] The roller conveyor line 1 includes a plurality of conveyor rollers, and the roller conveyor line 1 extends in the front-to-back direction; the pallet stacking machine 3 is mounted above the roller conveyor line 1; the mounting bracket 21 is vertically mounted near the side of the roller conveyor line 1, and the mounting bracket 21 is located in front of the operation of the pallet stacking machine 3; a plurality of limit switches 22 are mounted on the rear end surface of the mounting bracket 21 at intervals above and below; the trigger end of the limit switch 22 is arranged to face rearward;

[0040] The trigger end of the limit switch 22 is used to contact the front end surface of the first pallet 61 or the second pallet 62 stacked in the pallet stack 6; the limit switch 22 is also used to connect the signal of the control device that controls the operation of the roller conveyor line 1.

[0041] Figure 1 This is a structural diagram of an embodiment of a pallet transport mechanism with a pallet stacking order recognition function according to the present invention. Figure 2 Shown Figure 1 The mounting bracket 21 and multiple limit switches 22 in the figure, the first pallet 61 and the second pallet 62 in the pallet stack 6 are stacked alternately up and down, and the first pallet 61 and the second pallet 62 are both placed in the center, the length and width of the first pallet 61 are respectively smaller than the length and width of the second pallet 62, the front end surface of the second pallet 62 is exposed in front of the first pallet 61, and the front end surface of the first pallet 61 is recessed in the front end surface of the pallet stack 6.

[0042] After the pallet stacking machine 3 completes the stacking of a pallet stack 6, the pallet stack 6 is conveyed forward by the roller conveyor line 1 and approaches the mounting bracket 21. When the front end face of the pallet stack 6 contacts the rear end face of the mounting bracket 21, the front end faces of the larger plurality of second pallets 62 trigger the corresponding plurality of limit switches 22, while the plurality of limit switches 22 corresponding to the front end faces of the smaller plurality of first pallets 61 will not be triggered. After the control device receives the feedback information from all the limit switches 22, it compares it with the set sorting rules of the first pallet 61 and the second pallet 62. If the control device confirms that the stacking sorting of the first pallet 61 and the second pallet 62 in the pallet stack 6 is consistent with the set sorting rules, the control device controls the roller conveyor line 1 to continue running. If the control device confirms that the stacking sorting of the first pallet 61 and the second pallet 62 in the pallet stack 6 is inconsistent with the set sorting rules, the control device shuts down the roller conveyor line 1 and sends an alarm signal to notify the on-site staff to check the equipment status and remove the pallet stacks 6 that do not comply with the sorting rules.

[0043] Specifically, the pallet stacking machine 3 includes a mounting frame 31, a lifting device 35, two lifting plates 36 and two telescopic fork arms 32;

[0044] The mounting frame 31 is mounted on the top surface of the roller conveyor line 1; the two lifting plates 36 are respectively suspended on the left and right sides of the mounting frame 31; the two telescopic fork arms 32 are respectively mounted on the two lifting plates 36, and the two telescopic fork arms 32 are located in the same horizontal plane and opposite to each other on the left and right sides; the lifting device 35 is mounted on the top of the mounting frame 31;

[0045] The lifting device 35 is used to drive the two lifting plates 36 to move up and down synchronously;

[0046] The telescopic fork arm 32 is used to extend into a slot at the bottom of the first tray 61 or the second tray 62 .

[0047] like Figure 1 As shown, the stacking operation steps using the tray stacking machine 3 are as follows:

[0048] S1. Roller conveyor line 1 drives a first pallet 61 into the bottom area of ​​mounting frame 31. Opposing telescopic fork arms 32 extend into slots on the left and right ends of first pallet 61, respectively. Lifting device 35 then drives two lifting plates 36 upward, lifting both telescopic fork arms 32 and first pallet 61 upward.

[0049] S2. The roller conveyor line 1 drives a second pallet 62 into the bottom area of ​​the mounting frame 31. The lifting device 35 drives the two lifting plates 36, the two telescopic fork arms 32, and the first pallet 61 to lower downward, so that the bottom surface of the pallet 61 is stacked on the top surface of the second pallet 62. The two telescopic fork arms 32 then retract. The lifting device 35 drives the two lifting plates 36 and the two telescopic fork arms 32 to move downward again, so that the two telescopic fork arms 32 and the second pallet 62 on the conveying surface of the roller conveyor line 1 are at the same horizontal height. The two telescopic fork arms 32 extend into the slots at the left and right ends of the second pallet 62, respectively. The lifting device 35 then drives the two lifting plates 36 to move upward, and drives the two telescopic fork arms 32, as well as the stacked first pallet 61 and second pallet 62, to rise upward together.

[0050] S3. Roller conveyor line 1 drives another first pallet 61 into the bottom area of ​​mounting frame 31. Lifting device 35 drives two lifting plates 36 upward, driving two telescopic fork arms 32 and the stacked first and second pallets 61, 62 downward together, so that the bottom surface of the lowermost second pallet 62 is stacked on top of the first pallet 61 on the conveying surface of roller conveyor line 1.

[0051] S4. Repeat steps S1, S2 and S3 in sequence until the stacked first tray 61 or the second tray 62 reaches a set height, thus completing the stacking operation of the tray stack 6.

[0052] Furthermore, the tray stacking machine 3 is also equipped with a proximity sensor group 33;

[0053] The proximity sensor group 33 includes a first proximity sensor 331 , a second proximity sensor 332 and a third proximity sensor 333 ;

[0054] The first proximity sensor 331, the second proximity sensor 332, and the third proximity sensor 333 are arranged in sequence from top to bottom and are installed on the side of the left column or the right column of the mounting frame 31 facing the telescopic fork arm 32; the third proximity sensor 333 is close to the top surface of the roller conveyor line 1;

[0055] The first proximity sensor 331, the second proximity sensor 332 and the third proximity sensor 333 are respectively connected to the control device that controls the operation of the lifting device 35 and the two telescopic fork arms 32 by signal;

[0056] The positions of the first proximity sensor 331, the second proximity sensor 332 and the third proximity sensor 333 are defined as a lifting stop position, a fork arm retracting position and a fork arm extending position, respectively;

[0057] When the telescopic fork arm 32 rises and is located at the raising stop position, the first proximity sensor 331 is triggered;

[0058] When the telescopic fork arm 32 descends and is located at the fork arm retraction position, the second proximity sensor 332 is triggered;

[0059] When the telescopic fork arm 32 descends and is located at the fork arm extending position, the third proximity sensor 333 is triggered.

[0060] like Figure 3 As shown, the first proximity sensor 331 , the second proximity sensor 332 and the third proximity sensor 333 may be triggered by the approaching telescopic fork arm 32 which is a metal body.

[0061] The first proximity sensor 331 , the second proximity sensor 332 and the third proximity sensor 333 are respectively provided at the lifting stop position, the fork arm retraction position and the fork arm extension position, which can improve the control accuracy of the lifting height, retraction positioning and extension positioning of the telescopic fork arm 32 .

[0062] Preferably, the distance between the first proximity sensor 331 and the third proximity sensor 333 is not less than the height of either the first tray 61 or the second tray 62 .

[0063] When the telescopic fork arm 32 rises upward, if the distance between the bottom surface of the first pallet 61 or the second pallet 62 located at the bottom of the pallet stack 6 and the conveying surface of the roller conveyor line 1 is less than the height of either the first pallet 61 or the second pallet 62, the next first pallet 61 or the second pallet 62 will be blocked and unable to enter the bottom area of ​​the mounting frame 31.

[0064] Furthermore, the tray stacking machine 3 is also equipped with a photoelectric sensor 34;

[0065] The photoelectric sensor 34 is mounted on a side of the left or right column of the mounting frame 31 that faces the telescopic fork arm 32, and the photoelectric sensor 34 is located above the first proximity sensor 331; the light emitting end of the photoelectric sensor 34 extends horizontally and faces the other right column or the other left column of the mounting frame 31 diagonally opposite;

[0066] The photoelectric sensor 34 is used to detect whether the height of the pallet stack 6 reaches the set stacking height, and is connected to the control device that controls the operation of the lifting device 35 and the two telescopic fork arms 32 through signal transmission.

[0067] like Figure 1As shown, when the light emitting end of the photoelectric sensor 34 is blocked and triggered by the first pallet 61 or the second pallet 62 at the top of the pallet stack 6, it means that the height of the pallet stack 6 has reached the set height requirement. Subsequently, after the telescopic fork arm 32 descends and retracts, the roller conveyor line 1 transports the pallet stack 6 forward and makes the completed pallet stack 6 leave the bottom of the mounting frame 31 so that the stacking operation of the next pallet stack 6 can be carried out.

[0068] Specifically, the first pallet 61 and the second pallet 62 in the pallet stack 6 are placed in the center, the length and width of the first pallet 61 are respectively smaller than the length and width of the second pallet 62, the front end surface of the second pallet 62 is exposed in front of the first pallet 61, and the front end surface of the first pallet 61 is recessed in the front end surface of the pallet stack 6.

[0069] like Figure 1 and Figure 2 As shown, the first pallet 61 and the second pallet 62 in the pallet stack 6 are both placed in the center, and the front end face of the first pallet 61 is recessed in the front end face of the pallet stack 6, so that when the front end face of the pallet stack 6 contacts the rear end face of the mounting bracket 21, the multiple limit switches 22 corresponding to the front end faces of the multiple smaller first pallets 61 will not be triggered, so that the information of the untriggered limit switches 22 received by the control device corresponds one-to-one to the stacking position of the first pallets 61.

[0070] In summary, if Figure 1-3 In the embodiment of the utility model shown, the pallet transport mechanism with the function of identifying the stacking order of pallets, the identification device 2 includes a mounting bracket 21 and a plurality of limit switches 22. The plurality of limit switches 22 can cooperate with the control system to identify the stacking order of pallets in the pallet stack 6, thereby preventing the pallet stack 6 with the wrong stacking order from being transported to the production line, thereby avoiding the occurrence of production accidents caused by this.

[0071] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are intended solely to illustrate the principles of the present invention and should not be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, those skilled in the art will be able to devise other specific implementations of the present invention without inventive effort, and such implementations will fall within the scope of protection of the present invention.

Claims

1. A pallet transport mechanism with a pallet stacking order recognition function, characterized in that: Includes roller conveyor line, identification device and pallet stacking machine; The identification device includes a mounting bracket and a plurality of limit switches; The roller conveyor line includes a plurality of conveyor rollers, and the roller conveyor line extends in a front-to-rear direction; the pallet stacking machine frame is installed above the roller conveyor line; the mounting bracket is vertically installed near the side of the roller conveyor line, and the mounting bracket is located in front of the operation of the pallet stacking machine; a plurality of limit switches are installed on the rear end surface of the mounting bracket at intervals above and below; the trigger end of the limit switch is arranged to face rearward; The trigger end of the limit switch is used to contact the front end surface of the first pallet or the second pallet stacked in the pallet stack; the limit switch is also used to connect the signal of the control device that controls the operation of the roller conveyor line.

2. The pallet transport mechanism with pallet stacking order recognition function according to claim 1, characterized in that: The pallet stacking machine includes a mounting frame, a lifting device, two lifting plates and two telescopic fork arms; The mounting frame is mounted on the top surface of the roller conveyor line; the two lifting plates are respectively suspended on the left and right sides of the mounting frame; the two telescopic fork arms are respectively mounted on the two lifting plates, and the two telescopic fork arms are located in the same horizontal plane and opposite to each other on the left and right sides; the lifting device is mounted on the top of the mounting frame; The lifting device is used to drive the two lifting plates to move up and down synchronously; The telescopic fork arm is used to extend into a slot at the bottom of the first pallet or the second pallet.

3. The pallet transport mechanism with pallet stacking order recognition function according to claim 2, characterized in that: The tray stacking machine is also equipped with a proximity sensor group; The proximity sensor group includes a first proximity sensor, a second proximity sensor and a third proximity sensor; The first proximity sensor, the second proximity sensor, and the third proximity sensor are arranged in sequence from top to bottom and are installed on a side of the left column or the right column of the mounting frame facing the telescopic fork arm; the third proximity sensor is close to the top surface of the roller conveyor line; The first proximity sensor, the second proximity sensor and the third proximity sensor are respectively connected to a control device for controlling the operation of the lifting device and the two telescopic fork arms by signal; The positions of the first proximity sensor, the second proximity sensor and the third proximity sensor are respectively defined as a lifting stop position, a fork arm retracting position and a fork arm extending position; When the telescopic fork arm rises and is located at the raising stop position, the first proximity sensor is triggered; When the telescopic fork arm descends and is located at the fork arm retraction position, the second proximity sensor is triggered; When the telescopic fork arm descends and is located at the fork arm extending position, the third proximity sensor is triggered.

4. The pallet transport mechanism with pallet stacking order recognition function according to claim 3, characterized in that: A distance between the first proximity sensor and the third proximity sensor is not less than a height of either the first tray or the second tray.

5. The pallet transport mechanism with pallet stacking order recognition function according to claim 4, characterized in that: The pallet stacking machine is also equipped with a photoelectric sensor; The photoelectric sensor is mounted on a side of the left column or the right column of the mounting frame facing the telescopic fork arm, and the photoelectric sensor is located above the first proximity sensor; the light emitting end of the photoelectric sensor extends horizontally and faces the other right column or the other left column of the mounting frame diagonally opposite; The photoelectric sensor is used to detect whether the height of the pallet stack reaches the set stacking height, and is connected to the control device that controls the operation of the lifting device and the two telescopic fork arms by signal.

6. The pallet transport mechanism with pallet stacking order recognition function according to claim 1, characterized in that: The first pallet and the second pallet in the pallet stack are both placed in the center, the length and width of the first pallet are respectively smaller than the length and width of the second pallet, the front end surface of the second pallet is exposed in front of the first pallet, and the front end surface of the first pallet is recessed in the front end surface of the pallet stack.

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