JPS6221523Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a weighing and packaging device that weighs the material to be filled and puts a certain weight into a bag.

"Prior Art" Conventionally, in this type of packaging device, the material to be filled was weighed and then passed through a chute and placed into an empty bag.

``Problems to be solved by the invention'' However, in the case of such conventional packaging equipment, depending on the nature of the stuff to be filled, the stuff to be filled adheres to the chute, or the stuff to be filled that has adhered and accumulated is removed from the chute. The product falls off from the bag and is thrown into the empty bag, increasing the measurement error.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned conventional drawbacks and to provide a weighing and packaging device that uniformly fills each bag with the weighed material without error.

``Means for Solving the Problems'' The gist of the present invention for solving such problems is to have a bag chuck below the chute, and to hold the bag with the bag chuck and to remove the bag from the chute. A chute is fixed to a pedestal fixed to the installation floor of the weighing and packaging device, and a pedestal is suspended from the pedestal via a weighing load cell. and,
The valve opening means is comprised of a valve opening means pivotally supported by the pedestal and disposed below the chute, and the bag chuck, and the valve opening means includes a release valve that is close to the lower end of the chute and directly opens the chute; The measuring and packaging device is characterized by comprising a scattering prevention valve disposed below the valve, the tip of which faces the opening of the bag when opened.

``Function'' Therefore, only the chute is fixed to the pedestal, and the valve opening means consisting of the release valve that opens and closes the chute and the scattering prevention valve that prevents the object to be weighed from scattering to the outside during filling, and the bag chuck are connected to the weighing load cell. Since the bag is attached to a pedestal that is suspended from the pedestal via the bag, when filling the bag, the bag does not scatter out of the bag, and the release valve directly closes the chute at the end of filling. This prevents objects to be weighed attached to the chute from interfering with accurate weighing.

“Embodiment” An embodiment of the present invention will be described below based on the drawings.

The figure shows a device according to an embodiment of the present invention, in which a chute 1, which receives the material to be filled from above and guides it to the bag opening, is suspended from a pedestal, which will be described later. It is equipped with a bag gripping chuck 7 for gripping the loaded bag. The check 7
consists of a pair of chucks 71 and 72, at least one of which opens and closes in response to the movement of a lever 74 which is rotated around the pin 41 by a cylinder 73 (FIG. 1). The chucks 7 are arranged in two places on the left and right as shown in Fig. 2 so as to hold both ends of the opening of the bag, and the chucks 7 are placed close to each other in order to open the bag wide when the material to be filled is put into the bag. , a cylinder 75 allows a rod 77 to be moved inward by movement of a lever 76.

In the above device, the present invention comprises a chute 1 fixed to a pedestal 5, and a valve opening/closing means 2 pivotally supported by a pedestal 6 and disposed below the chute 1. A pedestal 5 is fixed to the installation floor of the apparatus, and the chute 1 is immovably fixed to the pedestal 5 above. On the other hand, the valve opening/closing means 2 is installed on the pedestal 6, and the pedestal 6 is suspended from the pedestal 5 by a rod 81 via a load cell 8. These rods 81 are arranged at a plurality of locations to form a stable hanging frame. The above-mentioned load cell is for weight measurement, but the above-mentioned rod 81 is used to stop the load cell when measurement is not required.
A rest piece 93 is provided at the lower end of a rod 92 connected to a slightly longer cylinder 91, and the rest piece 93 is raised so as to receive the base with the cylinder 91.

Valve opening/closing means 2 is provided between the chute 1 and the chuck 7.
is installed. The valve opening/closing means 2 includes an opening/closing valve 21 that is close to the lower end of the chute 1 and directly opens and closes the chute 1, and a scattering prevention valve 22 that is disposed below the opening/closing valve 21 and faces the opening of the bag. . The on-off valve 21 has a cylinder 212 attached to the tip of a lever 213 formed integrally with the bearing so that the on-off valve 21 can rotate around a pin 214 inserted in a bearing fixed to the on-off valve 21. When closed, it almost abuts against the lower end of the chute 1. The scattering prevention valve 22 arranged below the on-off valve 21 has a pair of left and right valve bodies, both of which rotate around a pin 222, so that the tip of the valve body is inside the opening of the bag during filling. I'm starting to get into it. This is done by the stroke of the rotation cylinder 223 of the valve body.

Next, the action will be explained.

First, prior to filling, the bag gripping chuck 7 grips both ends of the opening of the bag, and then, as the cylinder 75 operates, the left and right chucks come together, and at the same time, the bag mouth expanding suction cup expands the bag mouth in the front and back direction as shown in Fig. 1. Open the bag wide.

Next, the cylinder 223 is actuated to open the anti-scattering valve 22 downward, and its tip enters the opening of the bag. At the same time, the cylinder 212 also operates and the on-off valve 21 also opens wide. Next, the material to be filled flows down from the chute 1 and is filled into the bag. At this time, the weight detected by the load cell 8 is the pedestal 6, the valve opening/closing means 2 attached thereto, the bag gripping chuck 7, and the bag containing the material to be filled. Therefore, the load cell 8 is set so that the on-off valve 21 of the load cell 8 is set so that when a certain weight is reached, the on-off valve 21 is set to the tare weight, which is the weight excluding the material to be filled, and the weight of the material to be filled is added to this. When the load cell 8 detects that the above-mentioned constant weight has been reached, the cylinder 212 is actuated in response to a signal indicating this, and the on-off valve 21 is closed, thereby preventing the chute from peeling off and falling even if there is some adhesion to the chute. Finally, the cylinder 223 acts to close the anti-scattering valve 22, which has a pair of left and right valve bodies, away from the opening of the bag. Thereafter, the bag opening is closed and the weighing and packaging process is completed.

"Effect of the invention" According to the weighing and packaging device according to the invention, the chute is fixed to the pedestal, and the valve opening/closing means, bag chuck, and bag are suspended from the pedestal suspended from the load cell, so the chute is removed from the tare. Therefore, even if it adheres to the chute or peels off, it cannot become a problem after the measurement is completed and does not result in a measurement error.On the other hand, since the anti-scattering valve is included in the tare, the anti-scattering valve prevents the bag from opening. It is possible to prevent the contents from spilling at the bag opening without causing measurement errors even if the contents come into contact with the bag. Furthermore, although this effect overlaps with the above effect, since we have provided an on-off valve that directly closes the chute at the same time as the measurement is completed, there is no possibility that the deposits will peel off after measurement and fall into the bag, resulting in significantly improved measurement accuracy. Now we can do packaging.

[Brief explanation of the drawing]

Figure 1 is a front view showing one embodiment of the present invention;
The figures are both partially sectional views in side view. 1... Chute, 2... Valve opening/closing means, 21...
Opening/closing valve, 22... Filling valve, 5... Frame, 6... Pedestal, 8... Load cell.

Claims (1)

[Scope of Claim for Utility Model Registration] A chute has a bag chuck below the chute, and the bag is held between the chute and a certain weight of the material to be filled is thrown into the bag from the chute, under the following conditions. A measuring and packaging device comprising (A) and (B). (A) A chute 1 fixed to a pedestal 5 fixed to the installation floor of the weighing and packaging apparatus, and a pedestal 6 suspended from the pedestal 5 via a weighing load cell 8.
, a valve opening means 2 pivotally supported on the pedestal 6 and disposed below the chute 1, and the bag chuck 7.
It consists of (B) The valve opening means 2 is a release valve 21 that is close to the lower end of the chute 1 and directly opens the chute 1.
and a scattering prevention valve 22 which is disposed below the release valve 21 and whose tip faces the opening of the bag when opened.