JPS5952111B2 - Quantitative filling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fixed-quantity filling device used to accurately fill containers, etc. with solid materials having poor fluidity, such as salads, in fixed amounts. .

[Conventional technology]

Conventional fixed-quantity filling devices for the above-mentioned fillings or similar materials generally suck a fixed amount of filling into the cylinder by lowering the piston of the filling cylinder, and discharge it when the piston moves forward. It is designed to perform fixed amount filling.

However, if the filling material is a relatively homogeneous liquid material, the reciprocating movement of the piston of the filling cylinder may be expected to fill an accurate amount. In the case of a filling with a poor amount of liquid, it is difficult to fill the cylinder by the volume due to fluidity when the piston is sucked in by descending, and as a result, there is a problem that the amount of filling filled into the container tends to vary. Ta. In addition, when used in combination with a packaging machine that automatically wraps containers after filling, the filling operation will be interrupted if unwrapped containers become jammed on the packaging machine side. If filling is interrupted, the amount of material sucked into the filling cylinder tends to vary until a predetermined filling speed is reached when filling is restarted, which poses a problem in that fixed-quantity filling is hindered. [Problems to be Solved by the Invention] The present invention focuses on the above-mentioned problems in quantitative filling of fillers that contain solids and lack fluidity, and aims to improve them. An object of the present invention is to provide a fixed-quantity filling device capable of accurately filling a container with a fixed amount of a filler containing solids and having poor fluidity.

5 [Means for Solving the Problems] In order to achieve the above object, the present invention provides an apparatus for quantitatively filling a container with a filler having poor fluidity, such as a salad containing solids, which has a filling supply side passage. and a discharge side passage communicating with the filling nozzle, respectively, and an on-off valve connected to the supply side passage and supplying a non-flowing filling containing solid matter by pressing it with air pressure. a filling cylinder having a supply/discharge port connected to a branch between the on-off valves; a drive mechanism for applying a predetermined stroke to a piston rod of this cylinder; a torque limiter connected to a main shaft of this drive mechanism; restraining means for restraining the main shaft so that it cannot rotate, and the drive mechanism includes a motor that rotates the main shaft via the torque limiter, an A crank plate fixed to the shaft end of the main shaft, and the crank plate. The restraining means has a roller having an axis parallel to the main shaft mounted at an eccentric position, and a stopper engaged with the roller and fixed to the piston rod. An arm that is freely supported. a driving cylinder connected between the upper end of the arm and the fixed side; a protrusion protruding from the intermediate portion of the arm toward the side of the main shaft; and a protrusion protruding in the radial direction of the main shaft. and a protrusion that can engage with the protrusion when the arm is swung toward the main shaft by a driving cylinder, and when these protrusions engage, only the main shaft connected to the torque limiter stops rotating. This makes it possible to interrupt the filling operation.

〔Example〕

The present invention will be explained below with reference to embodiments shown in the drawings.

First, the outline of the apparatus of the present invention will be explained with reference to FIG. 1. A filling pressure feeding device 1 that uses air pressure to refeed the filling at a predetermined pressure, and a passage 2 that supplies the filling from this pressure feeding device 1. two electromagnetic on-off valves 3 and 4 interposed at a required interval, a filling cylinder 6 with a feed port 5 communicating with a passage between the on-off valves 3 and 4, and a piston of this cylinder 6. It has a drive mechanism 9 that causes the piston rod 8 connected to the piston rod 7 to reciprocate over a required stroke range, and a restraint means 29 that can optionally restrain the main shaft of the drive mechanism 9. It is mounted on a cart 11 which is movable.

Next, a specific example of the configuration will be explained with reference to FIG.

The filling cylinder 6 is attached to a bracket 1 on the device main body 12.
The piston rod 8 of the cylinder 6 is supported by bearings 14, 14 of the main body 12 so as to be vertically movable. The drive mechanism 9 for the piston rod 8 is driven by bearings 15, 15 installed on the truck 11.
A main shaft 16 is horizontally supported between the two, and a disc-shaped crank plate 17 is eccentrically attached to the end of the main shaft 16.

A roller 18 having an axis parallel to the main shaft 16 is disposed on the outer surface of the crank plate 17 on a diametrical line passing through the center of the main shaft 16.
is attached, and this roller 18 is connected to the piston rod 8.
It is in contact with the lower surface of the Tsutsuno Tsuki 9 fixed to the. A torque limiter 20 is connected to the opposite end of the main shaft 16, and a chain 21 from the motor M is connected to the torque limiter 20.
Rotation is transmitted through the torque limiter 20, and rotation is applied to the main shaft 16 through the torque limiter 20.

This torque limiter 20 idles when the rotation of the main shaft 16 is restrained by a restraint means 29, which will be described later, and the motor M
It is designed not to stop. An adjustment rod 22 is rotatably provided in parallel with the piston 7, and an adjuster 23 is screwed into a threaded portion 22a carved in the lower part of the adjustment rod 22. It is engaged with a stator 24 provided so as to be movable in the axial direction.

This adjuster 23 is brought into contact with the lower surface of the stopper 19 via a spacer 25, and by rotating a knob 26 at the top of the adjusting rod 22, the adjuster 23 can be moved in the vertical direction. ing. Further, the roller 18 of the crank plate 17 has a support portion fitted into a groove 17a formed in the diametrical direction of the crank plate 17, and means (details not shown) that can be fixed at any position.
have. By adjusting the positional relationship between this roller 18 and the stripper 19, the stroke of the piston rod 8, that is, the amount of charge received into the cylinder 6 can be determined. Switch actuation pieces 27 and 28 are provided on the main shaft 16, the first actuation piece 27 controls the opening and closing of the electromagnetic on-off valve 3 on the supply side, and the second actuation piece 28 controls the opening and closing of the electromagnetic on-off valve 4 on the discharge side, respectively. Switch SWl, S
It is configured to operate W2.

The restraining means 29 includes an arm 32 whose base end is pivotally supported by a pin 31 on a bearing 30 on the trolley 11, as shown in FIG.
A driving cylinder 3 connected to the tip of this arm 32
3, a protrusion 34 provided in the middle of the arm 32 toward the side of the main shaft 6, and a protrusion 35 capable of engaging with the protrusion 34 provided protruding in the radial direction of the main shaft 16, The cylinder 33 is an air cylinder, and when the cylinder 33 is operated, the arm 32 is swung to a position where its protrusion 34 can collide with the protrusion 35 of the main shaft 16. The operation command is given by a signal issued when the accumulation of filled containers in the packaging device combined with the device of the present invention exceeds a certain amount, and temporarily suspends the filling operation by the filling device.

Although details of the internal structure of the electromagnetic on-off valves 3 and 4 are not shown, the passage 2 and the passage 37 to the filling nozzle 36 are fully opened,
Any suitable valve device may be used as long as it allows for a fully closed operation. [Operation] In the state shown in FIG. 2, when the driving cylinder 33 of the restraining means 29 is turned off and the motor M is started, the main shaft 16 rotates via the torque limiter 20, and the main shaft 1
The crank plate 17 on the piston rod 6 rotates and the roller 18 begins to descend, allowing the piston rod 8 to descend accordingly.

At this time, the supply side electromagnetic on-off valve 3 is open, and the discharge side electromagnetic on-off valve 4 is closed. As the piston rod 8 descends, the volume inside the cylinder 6 increases, so the filling is forcibly pushed into the cylinder 6 through the passage 2 by the filling supply pressure from the pressure feeding device 1, and the piston rod 8 descends. Immediately before reaching the limit, the first actuating piece 2 on the main shaft 16
7, the switch SWl is turned off and the supply side electromagnetic on-off valve 3 is closed.

Then, with a slight time lag, the second actuating piece 28 closes the switch SW2 and opens the discharge side electromagnetic on-off valve 4, and at the same time the piston rod 8 closes the roller 18 of the crank plate 17.
The piston 7 forces the filling filled in the cylinder 6 to be pushed out through the passage 37 from the filling nozzle 36 into a container or the like. 37, the container or the like is filled from the filling nozzle 36.

After the piston 7 reaches its upper limit, the second actuating piece 28 turns off the switch SW2, so the discharge side electromagnetic on-off valve 4 is closed, and with a slight time lag, the first actuating piece 27 turns on the switch SW1. Then, the supply side electromagnetic on-off valve 3 is opened and the same process as above is started. When the filling operation is continuously performed and the accumulated amount of unwrapped containers exceeds a certain amount in the process of packaging containers filled with filling material, the cylinder 33 of the restraining means 29 is actuated by the signal, The arm 32 is swung toward the main shaft 16 using the pin 31 as a fulcrum, and as a result, the protrusion 34 of the arm 32 hits the protrusion 35 of the main shaft 16, and due to the action of the torque limiter 20, the motor M is not stopped and only the rotation of the main shaft 16 is caused. thwarted.

When the accumulated amount decreases, the supply of pressurized air to the cylinder 6 is cut off based on the command, the arm 32 returns to its original position, the projection 34 is separated from the projection 35 of the main shaft 6, and the restraint of the main shaft 16 is released. It will be destroyed. As a result, the main shaft 16 is operated by the torque limiter 2.
0 and the filling operation resumes as before. Therefore, there is no need to stop the motor M every time filling is interrupted. In the above embodiment, when the amount of accumulated unwrapped containers exceeds a certain amount in the packaging process, the filling speed is controlled by the restraining means 29. The filling speed may be controlled by capturing the speed each time from a timing cam attached to the packaging machine, and by activating the restraint means every time the piston 7 moves back and forth (one cycle).

In this case, it is preferable to adjust the filling device capacity so that it always exceeds the packaging capacity of the packaging process. [Effects of the Invention] As is clear from the above description, the present invention provides an on-off valve in each of the filling supply side passage and the discharge side passage of the filling cylinder, and alternately opens and closes the on-off valve to prevent the cylinder from entering the cylinder. Filling is performed by the supply pressure of pressurized air, and discharge is performed by forced driving of the piston, so even if the filling contains solids and has poor fluidity, such as salad, it is possible to fill the cylinder in a fixed amount. The result is that the amount of fill extruded by the piston is accurate, ensuring a quantitative filling of the container.

In addition, the piston drive mechanism has a structure in which the piston is pushed up by a crank mechanism that rotates the main shaft, so its operation is reliable.The main shaft is configured to transmit driving force through a torque limiter, and the hand shaft is controlled by a restraining means. By making it possible to stop only the rotation at will, it is possible to interrupt the filling operation at any time without stopping the drive source each time, and even if the filling operation is restarted after an interruption, the drive source will stop. Therefore, the filling operation is immediately restarted at the normal operating speed, and there is no inconvenience that the filling amount varies until the specified filling speed is reached, which would be the case if the drive source is stopped, and the A remarkable effect can be obtained in joint use, etc., and since the main shaft is restrained by the collision between the protrusion of the swinging arm and the protrusion on the main shaft, it is possible to ensure that the rotation of the main shaft is stopped at a predetermined position. There are various excellent effects such as: The on-off valve in the present invention uses electromagnetic valves and is configured to individually control opening and closing. However, this is a mechanical on-off valve in which both on-off valves are moved by appropriate means to open and close. Also, the restraining means of the drive device may be a solenoid or the like in addition to the drive cylinder.

[Brief explanation of drawings]

Fig. 1 is a schematic explanatory diagram showing the basic configuration of the device of the present invention, Fig. 2 is a partially sectional side view showing a specific embodiment of the device of the present invention, and Fig. 3 is a front view of the spindle restraining means. It is a diagram. 1... Filling force feeding device, 3... Supply side on-off valve, 4... Discharge side on-off valve, 5...
・・・・Supply/discharge port, 6 ・・・・・・Filling cylinder, 7
... Piston, 8 ... Piston rod, 9 ... Drive mechanism, 12 ... Device main body, 16 ... Main shaft, 17 ... ... Crank plate, 18 ... Mouth ringer, 19 ... Stopper, 20 ... Torque limiter, 22 ...
...Adjustment rod, 23...Adjustor, 24...
... Stator, 26... Knob, 27, 28.
...Switch operating piece, SW, SW.

Claims (1)

[Claims] 1 A device for quantitatively filling a container with a filler having poor fluidity, such as a salad containing solids, which includes an on-off valve installed in a filler supply side passage and a discharge side passage communicating with a filling nozzle, respectively. , a filling pumping device connected to the supply side passage and supplying a non-flowing filling containing solids by pressing it with air pressure; and a filling cylinder having a supply/discharge port connected to a branch part between the on-off valves. , a drive mechanism that applies a predetermined stroke to a piston rod of the cylinder, a torque limiter connected to a main shaft of the drive mechanism, and a restraining means capable of restraining the main shaft so as not to rotate, the drive mechanism comprising:
a motor that rotates the main shaft via the torque limiter; a crank plate fixed to the shaft end of the main shaft; a roller having an axis parallel to the main shaft and mounted at an eccentric position of the crank plate; a stopper engaged and fixed to the piston rod, and the restraining means includes an arm whose base end is swingably supported by a pin on the fixed side, and a stopper between the upper end of this arm and the fixed side. a driving cylinder connected to the arm; a protrusion provided at an intermediate portion of the arm protruding toward the side of the hand shaft; and a projection provided protruding in the radial direction of the hand shaft, the arm swinging toward the main shaft. and a protrusion that can engage with the protrusion when the protrusion is engaged with the protrusion, so that when the protrusions engage with each other, only the main shaft connected to the torque limiter stops rotating and the filling operation can be interrupted. quantitative filling equipment.