JPH0592112U - Bag gripping position detection device for automatic packaging machine - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] Detects whether the bag is properly gripped by the chuck, and when the grip is not normal, stops the subsequent packaging operation and eliminates contamination and poor sealing due to overflow. The purpose is to [Structure] In a bag gripping device that grips a bag 1 supplied from a bag supply device and feeds it to the next process, a first sensor 10 that detects the upper limit position of the gripped bag top and a certain distance downward And a second sensor 11 for detecting the lower limit position in the bag gripping position detection device for an automatic packaging machine.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a bag gripping device for an automatic packaging machine, which detects a bag gripping position when gripping a bag.

[0002]

[Prior Art]

 As shown in FIG. 3, the packaging system of the automatic packaging machine for foods or the like sucks the bag 1 in the bag storage device by the suction cup 3 of the bag feeding device A and lifts it up to the chuck 2 of the bag holding device B on the table T side. The bag feeding process (I) for handing over, the marking process (II) for marking the production date of the food with the marking device C on the surface of the grasped bag 1, and the suction cup 4 of the bag opening device D for opening the mouth of the bag 1. Opening process (III), filling processes (IV) and (V) for filling the bag with filling material and filling liquid by the filling device E, and primary sealing process for sealing the bag mouth by the sealing device F ( VI), the secondary sealing step (VII), and the discharging step (VIII) for delivering the packaged bag 1 to the next step or discharging it to the outside.

[0003]

[Problems to be solved by the device]

 In the bag feeding process (I) of the above packaging system, when the suction cup 3 of the bag feeding apparatus A sucks and lifts the bag 1, if the suction position is shifted upward or downward for some reason, When it is received by the chuck 2 of the bag gripping device B (holding both sides), the gripping position shifts upward or downward from the normal position.

The gripped bag 1 is then opened, and the bag is filled with the filling material and the bag mouth is sealed, but the gripping position by the chuck 2 is largely shifted downward as shown in FIG. 4A, for example. In this case, the storage volume in the bag below the gripping position is narrowed. Therefore, if the bag 1 is pulled outwards through the chuck 2 for air bleeding and sealing after storing the filling material, the inside filling Since the material or filling liquid may overcrow and spill outside, it may contaminate the sealing part and cause a seal failure, or it may contaminate the hot plate and other parts and cause a malfunction. The operation must be stopped, which leads to a decrease in the operating rate. Conversely, when the gripping position shifts upward as shown in Fig. 4B, the seal width s becomes narrow and causes the seal failure. And the storage capacity becomes wider. There was a problem that the air could not be removed sufficiently and the amount of residual air increased, causing food spoilage.

[0005]

[Means for Solving the Problems]

 The present invention is intended to solve the above problems, and is characterized by being gripped by a bag gripping device that grips a bag supplied from a bag feeding device and feeds it to the next process. It is characterized by having a first sensor for detecting the upper limit position of the bag top and a second sensor for detecting the lower limit position below a certain distance.

[0006]

[Action]

 When both the first sensor for upper limit detection and the second sensor for lower limit detection are both on, it is determined that the bag gripping position is displaced downward, and when both are off, the bag gripping position is upward. It is judged that the bag is misaligned, and in any case, the subsequent packing operation for that bag is stopped, the first sensor for upper limit detection is off, and the second sensor for lower limit detection is on. It is determined to be normal, and normal packaging operation is continued.

[0007]

【Example】

 An embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows the bag gripping position detection device of the present invention and the case where it is installed in the bag opening step (III), but it may be installed in the bag feeding step (I) or the marking step (II).

As shown in FIG. 1, the bag 1 gripped on both sides of the upper part of the bag by the chuck 2 is fed, the driving rod 6 is closed, and the upper suction cup 4 is connected to the bag via the links 12, 13 and 14. 1 is in contact with the upper part of the bag 1, and the cylinders 7, 7 are closed so that the lower suction cup 5 is in contact with the lower part of the bag 1.

The bag gripping position detection device determines whether gripping is normal by receiving a first sensor 10 that detects an upper limit of the bag gripping position by the chuck 2, a second sensor 11 that detects a lower limit, and an output signal from the first sensor 10. The control device 15 is configured to judge and control the packaging operation.

Each of the sensors is composed of a transmitter (optical) device and a receiver (optical) device, and is installed so as to face each other with the bag 1 interposed therebetween as shown in FIG. 1, and as shown in FIG. The installation position of the second sensor 11 is vertically displaced by e. Then, if this e is the allowable range of the deviation of the gripping position, and the top of the bag 1 gripped by the chuck 2 is within the range of this e, it is judged as normal, and if it is outside the range of e, it is abnormal. It will be judged.

Next, the operation of this device will be described. If there is no obstacle in the middle, the signal sent from the transmitter is received and turned on by the receiver, whereas if there is a failure, it is turned off without being received, and these signals are sent to the control device 15 one by one. ..

Now, when the top of the bag 1 gripped by the chuck 2 is within the allowable range e, the first sensor 10 is turned off, the second sensor 11 is turned on, and the control device 15 determines that the gripping is normal. The subsequent packaging operations such as filling and sealing are executed.

However, when the bag gripping position is largely deviated downward and the bag top is above the upper limit of the first sensor 10, both the first and second sensors are turned on, and on the contrary, the bag top is displaced largely upward. Is below the lower limit of the second sensor 11, both the first and second sensors are turned off, but in these cases, the control device 15 judges that the gripping is abnormal, and all the subsequent ones for the bag 1 are determined. Stop the various packaging operations. Therefore, the bag 1 is sent as it is and discharged to the outside in the discharging step (VIII).

[0014]

[Effect of the device]

 The bag gripping position detection device of the present invention includes a first sensor for detecting an upper limit of a gripped bag top, a second sensor for detecting a lower limit of the gripped bag, and a control for controlling a subsequent packaging operation based on output signals of these sensors. Since it is equipped with a device, only when the first sensor is off and the second sensor is on, the bag gripping position is judged to be normal, and the normal packaging operation is performed, and both the first and second sensors are operated. When it is on, the bag gripping position shifts downward and is abnormal, and when both are off, it is determined that it is abnormal because it shifts upward and all the subsequent packaging operations for that bag are stopped, and the bag is in that state. It will be sent as it is and discharged in the discharge process.

Therefore, since it is accurately detected whether the bag is gripped within the allowable range, the gripping position is shifted downward, the storage volume in the bag is narrowed, and the packing overflows, or conversely upward. Excellent effect that the seal width s will not be narrowed due to a large deviation, the mechanical failure due to poor sealing and contamination will be eliminated, and the specified storage volume will be secured and good air bleeding will be performed. There is.

[Brief description of drawings]

FIG. 1 is a diagram showing an application example of a bag gripping position detection device of the present invention.

FIG. 2 is a view showing installation positions of first and second sensors in the present invention.

FIG. 3 is a diagram showing an outline of a packaging system to which the present invention is applied.

FIG. 4A and FIG. 4B are views for explaining a problem of conventional bag gripping.

[Explanation of symbols]

 1 bag 2 chuck 10 first sensor for upper limit detection 11 second sensor for lower limit detection 15 control device

Claims (1)

[Scope of utility model registration request] 1. A bag gripping device for gripping a bag supplied from a bag supply device and feeding the bag to the next step, and a first sensor for detecting an upper limit position of the gripped bag top and a predetermined distance below the first sensor. And a second sensor for detecting the lower limit position in the bag gripping position detection device of the automatic packaging machine.