A device for detecting missing packages in a box

Abstract

The present invention provides a device for detecting the lack of packs in a strip box. A pulse generating mechanism and a switch detecting mechanism are both arranged on a strip box conveying mechanism. The pulse generating mechanism generates continuous pulses and sends them to the strip box. The switch detecting mechanism scans the internal cigarette packs of the strip box during the movement of the strip box. The signal is input into a controller. The controller performs an AND operation on the rising edge signal of each pulse and the cigarette pack detection signal. If the cigarette pack detection signal has a low level within the pulse signal interval, it is displayed as a lack of packs, and the missing cigarette strips are rejected at the rejection station. The device is used to detect the cigarette packs below the strip box, and the pulse generating mechanism and the switch detecting mechanism are used to detect the cigarette packs in the lower layer of the strip box passing through the packaging machine. A strip box is divided into several detection pulses. If the signal is at a low level within the pulse signal interval, it is displayed as a lack of packs. If the pulse signal interval is high level, there is no lack of packs, thereby eliminating the problem of missed detection due to lack of cigarette packs in the lower layer, cigarette packs crossing positions, or cigarette packs lying sideways.

Description

Technical Field

[0001] The present invention relates to the field of detection systems, and more particularly to a device for detecting the lack of packages in a strip box. Background Art

[0002] At present, the main reason for the lack of packs in the packaging process of the GDX2 packaging machine is that when the CH small pack transparent paper packaging machine removes the cigarette packs, the CH small pack replenishing bucket does not replenish the cigarettes in place, and the second is that the operator takes away the cigarette packs when troubleshooting during the production process and does not replenish them in time or the replenishment is insufficient. The self-equipped strip box missing pack detector of the packaging machine equipment is installed on the forming channel of the CT strip box packaging machine, and five capacitive proximity switches are used to detect the upper layer of cigarette packs in the strip box. The principle is to use the cigarette packs approaching the sensor, and the dielectric constant between the two changes to determine whether there is a pack missing. The capacitive sensor can detect both non-metallic objects and metal objects, and can obtain a relatively large detection distance for metal objects. Since the inner lining paper of the current small box cigarette packs is aluminum foil, which is a metal object, the five capacitive proximity switches mainly detect the existence of the cigarette packs by detecting the aluminum foil on the small box cigarette packs, and have no detection effect on the lower layer cigarette packs. In recent years, because the lower layer cigarette packs of the strip box packaging are horizontal or the lower layer is missing, the self-equipped detector of the equipment cannot detect, resulting in the lack of packs and missed detection.

[0003] In the existing technology, Chinese invention patent CN 202358367 U discloses "a device for detecting missing packs in a carton of cigarette packs", which was authorized and announced on August 1, 2012. It uses the reflector and receiver of a reflective fiber optic detector, and uses the side of the upper cigarette packs in the carton of cigarette packs in the conveying direction as a reflective plane to detect whether the receiver end receives the reflected light path. This solution uses a reflective fiber optic sensor to detect whether the cigarette packs on the upper layer of the carton are missing, and has no detection effect on the cigarette packs on the lower layer. Summary of the invention

[0004] In order to solve the technical defect of the existing packaging machine that the detector equipped with the equipment cannot detect the cigarette packs in the lower layer of the carton because the cigarette packs in the lower layer are tilted or missing, the present invention provides a device for detecting the lack of cigarette packs in the carton, which performs the lack of cigarette packs in the lower layer of the carton.

[0005] In order to achieve the above invention purpose, the technical solution adopted is:

[0006] A device for detecting a lack of packages in a strip box comprises a strip box conveying mechanism, a pulse generating mechanism and a switch detecting mechanism installed on a strip box packaging machine. The pulse generating mechanism and the switch detecting mechanism are both arranged on the strip box conveying mechanism. The pulse generating mechanism generates continuous pulses and transmits them to the strip box. The switch detecting mechanism detects a number of pulse signals corresponding to the strip box from a starting phase to an ending phase. If the signal is at a low level within the pulse signal interval, it is displayed as a lack of packages.

[0007] In the above scheme, an electrical scanning detection method is adopted, and the device is used to detect the cigarette packs under the strip box, and the cigarette packs under the strip box passing through the packaging machine are detected through the pulse generation mechanism and the switch detection mechanism. The advantage is that a strip box is divided into several detection pulses. In the pulse signal interval, if the signal is low level, it is displayed as a missing pack. If the pulse signal interval is high level, there is no missing pack. As long as no cigarette pack is detected within the pulse range, the strip box is rejected at the original machine rejection station of the packaging machine; the problem of missed detection caused by missing cigarette packs in the lower layer, cigarette packs crossing positions or cigarette packs lying sideways is eliminated.

[0008] The strip box conveying mechanism includes a conveying platform and a strip box guide plate; the conveying platform is arranged at the front end of the packaging machine and is used to convey the strip boxes; the strip box guide plate is fixedly arranged on the conveying platform and is used to limit the position of the strip boxes on the conveying platform.

[0009] The number of the strip box guide plates is set to 2, which are arranged on both sides of the strip box moving direction and are symmetrical.

[0010] A smooth coating is arranged on a surface of one side of the strip box guide plate facing the conveying platform.

[0011] The pulse generating mechanism comprises a pulse signal generator for generating and transmitting pulses.

[0012] The generated pulse is a rectangular signal pulse.

[0013] The switch detection mechanism includes a proximity switch and a detector, which are electrically connected, and the number of which is set to 5 and are arranged side by side on the conveyor platform. When the strip box reaches the detection area, the proximity switch triggers the detector, and the detector detects several pulse signals corresponding to the strip box from the starting phase to the ending phase.

[0014] The five proximity switches and detectors are embedded in the conveying platform at equal intervals.

[0015] The proximity switch is an inductive proximity switch.

[0016] The detector is a pulse level detector.

[0017] The present invention mainly adopts an electrical scanning detection method, and is mainly composed of a pulse generating mechanism and a switch detection mechanism.

[0018] A proximity switch is set for each pack of cigarettes, and a fixed-phase pulse trigger scanning method is used to detect the cigarette packs in the carton within several pulse signals corresponding to the starting phase to the ending phase. As long as the detector cannot detect a high level within the pulse signal interval, an alarm signal is issued and the cigarette packs are rejected at the original carton rejection station of the packaging machine.

[0019] In the above scheme, the proximity switch of the present invention is installed below the cigarette box to make up for the deficiency that the equipment's self-equipped CV missing cigarette box detection cannot detect the lower layer of cigarette packs, and adopts pulse scanning detection to avoid missed detection caused by the horizontal cigarette packs.

[0020] Its advantages are that it avoids missed inspections caused by the lower layer of cigarette bales lying sideways; it is simple to install, and the spare parts are universal and easy to purchase; the rejection station and control PLC all use existing equipment; and it adopts pulse scanning detection.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention provides a device for detecting the lack of packs in a strip box, which adopts an electrical scanning detection method. The device is used to detect the cigarette packs under the strip box, and detects the cigarette packs in the lower layer of the strip box passing through the packaging machine through a pulse generating mechanism and a switch detection mechanism. The advantage is that a strip box is divided into several detection pulses. In the pulse signal interval, if the signal is low level, it is displayed as a lack of packs. If the pulse signal interval is high level, there is no lack of packs. As long as no cigarette packs are detected within the pulse range, the strip box is rejected at the original machine rejection station of the packaging machine; the problem of missed detection caused by lack of cigarette packs in the lower layer, cigarette packs crossing positions or cigarette packs lying sideways is eliminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A top view of the device of the present invention;

[0024] Figure 2 is a side cross-sectional view of the device of the present invention;

[0025] Figure 3 It is the signal principle diagram of the present invention;

[0026] Explanation of the accompanying drawings: 1. Bar box conveying mechanism; 2. Pulse generating mechanism; 3. Switch detecting mechanism; 11. Conveying platform; 12. Bar box guide plate. DETAILED DESCRIPTION

[0027] The drawings are for illustrative purposes only and should not be construed as limiting the present patent;

[0028] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0029] Example 1

[0030] like Figure 1 , Figure 2 and Figure 3As shown, a device for detecting a lack of package in a strip box comprises a strip box conveying mechanism 1, a pulse generating mechanism 2 and a switch detecting mechanism 3 installed on a strip box packaging machine. The pulse generating mechanism 2 and the switch detecting mechanism 3 are both arranged on the strip box conveying mechanism 1. The pulse generating mechanism 2 generates continuous pulses and transmits them to the strip box. The switch detecting mechanism 3 detects a number of pulse signals corresponding to the strip box from the starting phase to the ending phase. If the signal is at a low level within the pulse signal interval, it is displayed as a lack of package.

[0031] In the above scheme, an electrical scanning detection method is adopted, and the device is used to detect the cigarette packs under the carton, and the cigarette packs under the carton passing through the packaging machine are detected through the pulse generating mechanism 2 and the switch detecting mechanism 3. The advantage is that a carton is divided into several detection pulses. In the pulse signal interval, if the signal is low level, it is displayed as a missing pack. If the pulse signal interval is high level, there is no missing pack. As long as no cigarette pack is detected within the pulse range, the carton is rejected at the original machine rejection station of the packaging machine; the problem of missed detection caused by missing cigarette packs in the lower layer, cigarette packs crossing positions or cigarette packs lying sideways is eliminated.

[0032] The strip box conveying mechanism 1 includes a conveying platform 11 and a strip box guide plate 12; the conveying platform 11 is arranged at the front end of the packaging machine for conveying the strip boxes; the strip box guide plate 12 is fixedly arranged on the conveying platform 11 for limiting the position of the strip boxes on the conveying platform 11.

[0033] The number of the barrel guide plates 12 is set to 2, which are arranged on both sides of the barrel moving direction and are symmetrical.

[0034] The surface of the strip box guide plate 12 facing the conveying platform is provided with a smooth coating.

[0035] The pulse generating mechanism 2 comprises a pulse signal generator for generating and emitting pulses.

[0036] The generated pulse is a rectangular signal pulse.

[0037] The switch detection mechanism 3 includes a proximity switch and a detector, which are electrically connected, and the number of which is set to 5 and are arranged side by side on the conveying platform. When the strip box reaches the detection area, the proximity switch triggers the detector, and the detector detects several pulse signals corresponding to the strip box from the starting phase to the ending phase.

[0038] The five proximity switches and detectors are embedded in the conveying platform at equal intervals.

[0039] The proximity switch is an inductive proximity switch.

[0040] The detector is a pulse level detector.

[0041] Example 2

[0042] The present invention mainly adopts an electrical scanning detection method, and is mainly composed of a pulse generating mechanism 2 and a switch detection mechanism 3.

[0043] A proximity switch is set for each pack of cigarettes, and a fixed-phase pulse trigger scanning method is used to detect the cigarette packs in the carton within several pulse signals corresponding to the starting phase to the ending phase. As long as the detector cannot detect a high level within the pulse signal interval, an alarm signal is issued and the cigarette packs are rejected at the original carton rejection station of the packaging machine.

[0044] The proximity switch of the present invention is installed below the cigarette box, which makes up for the deficiency that the equipment's self-equipped CV missing cigarette box detection cannot detect the lower layer of cigarette packs, and adopts a pulse scanning detection method to avoid missed detection caused by the horizontal cigarette packs.

[0045] Its advantages are that it avoids missed inspections caused by the lower layer of cigarette bales lying sideways; it is simple to install, and the spare parts are universal and easy to purchase; the rejection station and control PLC all use existing equipment; and it adopts pulse scanning detection.

[0046] The proximity switches used in the present invention are embedded inductive proximity switches with a sensing distance of not less than 4 mm. The inductive proximity switches are evenly distributed from the edges of the left and right cigarette packs to the middle, and a normally placed single cigarette pack cannot be detected by adjacent proximity switches at the same time.

[0047] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A device for detecting a missing package in a box, characterized in that: The invention comprises a strip box conveying mechanism (1), a pulse generating mechanism (2), and a switch detecting mechanism (3) installed on a strip box packaging machine. The pulse generating mechanism (2) and the switch detecting mechanism (3) are both arranged on the strip box conveying mechanism (1). The pulse generating mechanism (2) generates continuous pulses and transmits them to the strip box. The switch detecting mechanism (3) detects a plurality of pulse signals corresponding to the strip box from the starting phase to the ending phase. If the signal is at a low level within the pulse signal interval, it is displayed as a lack of a package. The strip box conveying mechanism (1) comprises a conveying platform (11) and a strip box guide plate (12); the conveying platform (11) is arranged at the front end of the packaging machine and is used to convey the strip boxes; the strip box guide plate (12) is fixedly arranged on the conveying platform (11) and is used to limit the position of the strip boxes on the conveying platform (11); The pulse generating mechanism (2) is located above the bar box, and the switch detecting mechanism (3) is located below the bar box; The switch detection mechanism (3) includes a proximity switch and a detector, which are electrically connected, the number of which is set to 5 and are arranged side by side on the conveying platform (11). When the strip box reaches the detection area, the proximity switch triggers the detector, and the detector detects a number of pulse signals corresponding to the strip box from the starting phase to the ending phase; A smooth coating is provided on the surface of one side of the strip box guide plate (12) facing the conveying platform.

2. The device for detecting the lack of a pack in a cartridge according to claim 1, characterized in that: The number of the strip box guide plates (12) is set to 2, which are arranged on both sides of the strip box moving direction and are symmetrical.

3. The device for detecting the lack of a pack in a cartridge according to claim 2, characterized in that: The pulse generating mechanism comprises a pulse signal generator for generating and transmitting pulses.

4. The device for detecting the lack of a pack in a cartridge according to claim 3, characterized in that: The generated pulse is a rectangular signal pulse.

5. The device for detecting the lack of a pack in a cartridge according to claim 4, characterized in that: The five proximity switches and detectors are embedded in the conveying platform (11) at equal intervals.

6. The device for detecting the lack of a pack in a cartridge according to claim 5, characterized in that: The proximity switch is an inductive proximity switch.

7. The device for detecting the lack of a pack in a cartridge according to claim 6, characterized in that: The detector is a pulse level detector.

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