Tray shape detection device and conveying line

Abstract

The utility model provides a tray shape detection device and a conveying line. Relates to the field of logistics conveying equipment, and comprises a horizontal assembly and a vertical assembly, the horizontal assembly is provided with distance measuring elements distributed on the two sides of a tray conveying path, and the vertical assembly is provided with a vertically-arranged photoelectric element. The distance measuring element of the horizontal assembly is used for detecting the positions of the two sides of the tray so as to determine the position of the tray, the position of the photoelectric element of the vertical assembly is adjusted, the photoelectric element is adjusted in a follow-up mode according to the position of the tray and keeps aligned with the detection area and the tray position, and accurate detection of whether the tray exceeds the boundary is achieved. And the appearance detection requirement in the conveying process of goods carried by the tray is met.

Description

Technical Field

[0001] The utility model relates to the field of logistics conveying equipment, in particular to a pallet shape detection device and a conveying line. Background Art

[0002] In logistics, warehousing and other scenarios, automated conveying equipment is used to transport a variety of goods. The goods are placed on pallets and transported together. In order to ensure the stability during the transportation process, it is necessary to perform out-of-bounds detection on the pallet and the goods to determine whether the relative position relationship between the goods on the pallet and the pallet meets the requirements.

[0003] At present, combined photoelectric detection schemes have gradually replaced manual visual inspection, which has improved the detection accuracy to a certain extent. However, the photoelectric sensor of the current combined photoelectric detection equipment is a fixed structure with a fixed detection range. When the pallet is displaced, it is easy to cause false triggering and misjudgment of the alarm. If the detection range of the photoelectric sensor is increased and the recognition range of the pallet is expanded, the goods carried on the pallet will be misjudged as pallet displacement when they exceed the boundary, affecting the accuracy of the over-boundary detection. When the goods exceed the pallet by a large amount, safety accidents are likely to occur. A Chinese patent application (publication number: CN108827171A) discloses a photoelectric detection gantry frame, which is provided with an infrared transmitter head and an infrared transmitter with an adjustable position, but it is for the identification of the height of the object. It is impossible to detect whether the pallet-carried goods that are prone to overall displacement are over-bounded during transportation, and it is difficult to meet the appearance detection requirements of the pallet-carrying goods process. Utility Model Content

[0004] The purpose of the utility model is to provide a pallet shape detection device and a conveyor line in response to the defects of the prior art. The device adopts a distance measuring element of a horizontal component to detect the positions of both sides of the pallet to determine the position of the pallet, and adjusts the position of the photoelectric element of the vertical component so that the photoelectric element is adjusted according to the position of the pallet to maintain alignment with the detection area and the pallet position, thereby achieving accurate detection of whether the pallet is out of bounds and meeting the shape detection requirements during the transportation of pallet-loaded goods.

[0005] The first purpose of the utility model is to provide a pallet shape detection device, which adopts the following technical solutions: including:

[0006] A horizontal component has distance measuring elements distributed on both sides of the pallet conveying path, the distance measuring elements are used to detect the distance between the conveyed pallet and the distance measuring elements and send the distance to the controller;

[0007] A vertical assembly, having photoelectric elements arranged vertically, two groups of photoelectric elements arranged at intervals in the horizontal direction, the two groups of photoelectric elements cooperate with a horizontal shift mechanism, the photoelectric elements are used to detect whether the position of the goods on the conveyed pallet along the horizontal plane perpendicular to the conveying direction exceeds the set range and send it to the controller;

[0008] The controller is used to control the horizontal shift mechanism to adjust the positions and / or spacing between the two groups of photoelectric elements.

[0009] Furthermore, it also includes a support frame, the support frame is provided with a detection channel for the pallet and the goods thereon to pass through, and the horizontal component and the vertical component are installed on the support frame.

[0010] Furthermore, the support frame includes columns and cross braces, two columns and two cross braces are connected to form a circular structure, the horizontal components are installed on the columns, and the vertical components are installed on the cross braces.

[0011] Furthermore, the line connecting the distribution positions of the two groups of photoelectric elements is orthogonal to the conveying direction of the tray.

[0012] Furthermore, the two groups of photoelectric elements are respectively equipped with horizontal shift mechanisms to control the perpendicular bisector of the connection line of the two groups of photoelectric element distribution positions to be coplanar with the center line of the conveyed tray along the conveying direction.

[0013] Furthermore, the photoelectric element is a reflector-type photoelectric sensor, the reflector of which is installed above the tray conveying path, and the light emitter and light receiver of which are installed on the horizontal shift mechanism and are located below the tray conveying path.

[0014] Furthermore, the horizontal shift mechanism is selected from one of a synchronous belt mechanism, a screw slider mechanism, a gear rack mechanism or a linear motor.

[0015] Furthermore, the detection area of ​​the distance measuring element faces the conveying path of the pallet, and the distance measuring element is located between the bottom surface and the top surface of the detected pallet.

[0016] The second object of the utility model is to provide a conveyor line, which utilizes the pallet shape detection device as described above; and further comprises a conveying mechanism, wherein the pallet and goods conveyed by the conveying mechanism pass through the pallet shape detection device.

[0017] Furthermore, the tray shape detection device is arranged between two groups of conveying mechanisms that are spaced apart, and the detection area of ​​the photoelectric element passes through the gap between the two groups of conveying mechanisms.

[0018] Compared with the prior art, the utility model has the following advantages and positive effects:

[0019] (1) In order to solve the problem that the current fixed detection elements are difficult to detect the out-of-bounds of offset pallets, the distance measuring elements of the horizontal component are used to detect the positions of the two sides of the pallet to determine the position of the pallet, and the position of the photoelectric element of the vertical component is adjusted so that the photoelectric element can be adjusted according to the position of the pallet to maintain alignment with the detection area and the pallet position, thereby achieving accurate detection of whether the pallet is out of bounds and meeting the shape detection requirements of the pallet during the transportation of goods.

[0020] (2) The two groups of photoelectric elements are respectively equipped with horizontal shift mechanisms, which can adjust their positions respectively, so that the spacing and position between the two groups of photoelectric elements can be adjusted. By adjusting the spacing, the detection of pallets of different sizes can be adapted. By adjusting the positions of the two groups of photoelectric elements, they can be kept aligned with the pallet to achieve follow-up detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0022] Figure 1 It is a schematic diagram of the tray shape detection device in Examples 1 and 2 of the present utility model.

[0023] Figure 2 It is a top view schematic diagram of the tray shape detection device in Examples 1 and 2 of the utility model.

[0024] Figure 3 It is a front view schematic diagram of the tray shape detection device in Examples 1 and 2 of the utility model.

[0025] Figure 4 It is a side view schematic diagram of the tray shape detection device in Examples 1 and 2 of the present utility model.

[0026] In the figure, 1. photoelectric element, 2. column, 3. conveying mechanism, 4. upper cross brace, 5. goods, 6. pallet, 7. lower cross brace, 8. distance measuring element. DETAILED DESCRIPTION

[0027] Example 1

[0028] In a typical implementation of the present invention, Figure 1-Figure 4 As shown, a pallet shape detection device is proposed.

[0029] The pallet shape detection device is described in detail below with reference to the accompanying drawings.

[0030] See also Figure 1 The pallet shape detection device mainly includes a horizontal component and a vertical component, wherein the horizontal component refers to two distance measuring elements 8 arranged in the horizontal direction, and the vertical component includes two groups of photoelectric elements 1 arranged in the vertical direction and a horizontal shifting mechanism for driving the photoelectric components to move. The distance measuring elements 8 are located on both sides of the conveying path of the pallet 6, and the distance between the pallet 6 and the distance measuring elements 8 is measured respectively to determine the horizontal position of the pallet 6; the position of the photoelectric element 1 is adjusted by the horizontal shifting mechanism, and the photoelectric element 1 can be used to detect whether the goods 5 on the pallet 6 exceeds the set range.

[0031] It can be understood that the conveying path of the pallet 6 in this embodiment refers to the direction in which the pallet 6 and the goods 5 move on the conveying mechanism 3, and the direction in which the pallet 6 is offset is the direction within the plane where the conveying surface of the conveying mechanism 3 carrying the pallet 6 is located and is perpendicular to the moving direction of the pallet 6, that is, the horizontal direction of the conveying mechanism 3.

[0032] During the transportation of the pallet 6 carrying the goods 5 along the conveying mechanism 3, the pallet 6 is prone to horizontal deviation perpendicular to its conveying direction. If the position of the out-of-bounds detection element is fixed, its detection range is inconvenient to cover the conveying process of the pallet 6 with fluctuating position. In this regard, in the present embodiment, the position of the distance measuring element 8 is fixed, and after measuring the distance with the pallet 6 from both sides, the relative position of the pallet 6 and the distance measuring element 8 is determined, and the horizontal shift mechanism drives the photoelectric element 1 to adjust its position so that the position of the photoelectric element 1 corresponds to the position of the pallet 6, and the two sides of the pallet 6 are detected respectively, and the out-of-bounds range of the goods 5 on the pallet 6 is pre-set, and the position of the photoelectric element 1 is matched with the out-of-bounds range. If the goods 5 are out of bounds, the detection state of the photoelectric element 1 will be triggered to change, and it will be determined that the goods 5 on the pallet 6 are out of bounds.

[0033] like Figure 2 and Figure 3 As shown, the horizontal component and the vertical component are respectively installed on a support frame, and the support frame is provided with a detection channel for the pallet 6 and the goods 5 carried thereon to pass through. The ranging element 8 and the photoelectric element 1 are arranged toward the detection channel to detect the pallet 6 and the goods 5 thereon.

[0034] Specifically, the distance measuring element 8 detects the distance between the conveyed tray 6 and the distance measuring element 8 and sends it to the controller. After obtaining the distance data, the controller calculates the position of the tray 6 relative to the support frame, and controls the horizontal shift mechanism to adjust the positions of the two groups of photoelectric elements 1, so that the perpendicular bisector of the connection line of the distribution positions of the two groups of photoelectric elements 1 is coplanar with the center line of the conveyed tray 6 along the conveying direction, and the detection area of ​​the photoelectric element 1 corresponds to the actual position of the tray 6, avoiding false touch and misjudgment problems caused by the mismatch between the detection area and the position of the tray 6.

[0035] The photoelectric element 1 detects whether the position of the goods 5 on the conveyed pallet 6 along the horizontal plane perpendicular to the conveying direction exceeds the set range and sends it to the controller. The controller can determine whether to output a prompt alarm message based on the data fed back by the photoelectric element 1.

[0036] The detection area of ​​the distance measuring element 8 faces the conveying path of the tray 6 , and the distance measuring element 8 is located between the bottom surface and the top surface of the detected tray 6 , so that the detection position of the detection element corresponds to the distribution position of the tray 6 .

[0037] The distance measuring element 8 adopts a distance measuring sensor, and the distance measuring element 8, the horizontal shift mechanism and the photoelectric element 1 are respectively connected to the controller.

[0038] Among them, if the size specifications of the conveyed tray 6 change, the actual position and size of the tray 6 are also measured by the ranging element 8. According to the correspondence between the preset tray 6 size and the out-of-bounds range, the positions of the two groups of photoelectric elements 1 are adjusted, and the detection range of the photoelectric element 1 is changed to match the size of the tray 6.

[0039] like Figure 1 and Figure 4 As shown, the support frame includes columns 2 and cross braces. Two columns 2 and two cross braces are connected to form a circular structure. The horizontal component is installed on the columns 2. A group of distance measuring elements 8 of the horizontal component is installed on one column 2, and another group of distance measuring elements 8 is installed on another column 2.

[0040] In this embodiment, the photoelectric element 1 is a reflector-type photoelectric sensor, whose reflector is installed above the conveying path of the tray 6 , and whose light emitter and light receiver are installed in a horizontal shift mechanism and are located below the conveying path of the tray 6 .

[0041] Correspondingly, the two cross braces are an upper cross brace 4 located above the conveying path of the pallet 6 and a lower cross brace 7 located below the conveying path of the pallet 6, wherein the horizontal shift mechanism is installed on the lower cross brace 7, the light emitter is connected to the output end of the horizontal shift mechanism, the light emitter reciprocates upward along the axis of the lower cross brace 7, and the reflector is installed on the upper cross brace 4 and arranged opposite to the light emitter.

[0042] Among them, the reflector can meet the reflection requirements of different detection positions of the light emitter and cover the reflective positions in all ranges of the reflector adjustment.

[0043] The two groups of photoelectric elements 1 are respectively equipped with a horizontal shift mechanism, which controls the perpendicular bisector of the connection line of the distribution positions of the two groups of photoelectric elements 1 to be coplanar with the center line of the conveyed tray 6 along the conveying direction, so as to realize the centering of the photoelectric component detection area and the actual position of the tray 6. The horizontal shift mechanism can be a synchronous belt mechanism, a screw slider mechanism, a gear rack mechanism or an electric cylinder. Taking the screw slider mechanism as an example, the screw of the screw slider mechanism is installed on the lower cross brace 7 through a support seat, and the axial distribution direction of the screw is consistent with the displacement direction required by the light emitter. The slider is installed on the screw, and the screw cooperates with driving elements such as servo motors. The light emitter is installed on the slider, and the screw drives the slider and the light emitter to adjust the position to change the detection position of the light emitter.

[0044] When a synchronous belt mechanism is used, the light emitter can be installed on the synchronous belt of the synchronous belt mechanism so that it can move and adjust its position following the synchronous belt; when a gear and rack mechanism is used, the rack is arranged along the required shift direction of the light emitter, and the driving element of the servo motor drives the gear to engage with the rack, and the gear drives the rack to move, thereby driving the light emitter installed on the rack to move and adjust the position of the light emitter; when a linear motor is used, the light emitter is installed on the linear motor slider, and the position of the light emitter is adjusted by the action of the linear motor. Of course, the horizontal shift mechanism can also be other mechanisms that can realize controllable linear reciprocating motion, and its specific form is not limited in this embodiment. In other optional implementations, the light emitter is installed at the output position of the horizontal shift structure to meet the needs of light emitter position adjustment.

[0045] The connecting line of the distribution positions of the two groups of photoelectric elements 1 is orthogonal to the conveying direction of the tray 6, matching the posture of the tray 6 during the conveying process, so that the detection range of the photoelectric element 1 is located on both sides of the tray 6, realizing accurate out-of-bounds detection.

[0046] Example 2

[0047] In another embodiment of the present invention, Figure 1-Figure 4 As shown, a conveyor line is proposed.

[0048] The conveying line includes a conveying mechanism 3, such as Figure 1-Figure 4 As shown, taking two groups of conveying mechanisms 3 arranged in sequence as an example, the pallet shape detection device is located between the two groups of conveying mechanisms 3 connected in series, and the pallet 6 and goods 5 conveyed by the conveying mechanisms 3 pass through the pallet shape detection device.

[0049] The detection area of ​​the photoelectric element 1 passes through the gap between the two groups of conveying mechanisms 3, which can avoid the conveying mechanism 3 body blocking the detection process of the photoelectric element 1, so that the photoelectric element 1 can accurately identify the pallet 6 and the goods 5.

[0050] The conveying mechanism 3 may be a conveyor belt, a conveyor roller, a chain conveyor, or the like.

[0051] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A pallet shape detection device, characterized in that: include: A horizontal component has distance measuring elements distributed on both sides of the pallet conveying path, the distance measuring elements are used to detect the distance between the conveyed pallet and the distance measuring elements and send the distance to the controller; A vertical assembly, having photoelectric elements arranged vertically, two groups of photoelectric elements arranged at intervals in the horizontal direction, the two groups of photoelectric elements cooperate with a horizontal shift mechanism, the photoelectric elements are used to detect whether the position of the goods on the conveyed pallet along the horizontal plane perpendicular to the conveying direction exceeds the set range and send it to the controller; The controller is used to control the horizontal shift mechanism to adjust the positions and / or spacing between the two groups of photoelectric elements.

2. The pallet shape detection device according to claim 1, characterized in that: It also includes a support frame, which is provided with a detection channel for the pallet and the goods thereon to pass through, and the horizontal component and the vertical component are installed on the support frame.

3. The pallet shape detection device according to claim 2, characterized in that: The support frame comprises upright posts and horizontal braces, wherein two upright posts and two horizontal braces are connected to form a circular structure, the horizontal components are installed on the upright posts, and the vertical components are installed on the horizontal braces.

4. The pallet shape detection device according to claim 1, characterized in that: The connecting line of the two groups of photoelectric element distribution positions is orthogonal to the conveying direction of the tray.

5. The pallet shape detection device according to claim 1, characterized in that: The two groups of photoelectric elements are respectively equipped with horizontal shift mechanisms to control the perpendicular bisector of the connection line of the two groups of photoelectric element distribution positions to be coplanar with the center line of the conveyed tray along the conveying direction.

6. The pallet shape detection device according to claim 5, characterized in that: The photoelectric element is a reflector-type photoelectric sensor, the reflector of which is installed above the tray conveying path, and the light emitter and light receiver of which are installed on the horizontal shift mechanism and are located below the tray conveying path.

7. The pallet shape detection device according to claim 1, characterized in that: The horizontal shift mechanism is selected from one of a synchronous belt mechanism, a screw slider mechanism, a gear rack mechanism or a linear motor.

8. The pallet shape detection device according to claim 1, characterized in that: The detection area of ​​the distance measuring element faces the conveying path of the pallet, and the distance measuring element is located between the bottom surface and the top surface of the detected pallet.

9. A conveyor line, characterized in that: It comprises a pallet shape detection device as described in any one of claims 1 to 8, and a conveying mechanism, wherein the pallet and goods conveyed by the conveying mechanism pass through the pallet shape detection device.

10. The conveyor line according to claim 9, characterized in that: The tray shape detection device is arranged between two groups of conveying mechanisms arranged at intervals, and the detection area of ​​the photoelectric element passes through the gap between the two groups of conveying mechanisms.

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