JPH0440246B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a liquid quantitative filling device used for filling containers with liquids such as fluid foods.

Prior Art This type of device includes, for example, the
As disclosed in Publication No. 26550, a cylindrical nozzle body, a damper attached to the lower end of the nozzle body so as to be movable in the vertical direction, a spring hanging member arranged and fixed at the upper part of the nozzle body, and a spring A coil spring suspended from a hanging member, a connecting member connecting the lower end of the coil spring and the free end of the damper, and a connecting member fixed to the connecting member and positioned below the coil spring against falling liquid. It is equipped with a resistor.

In this device, when liquid is forced into the inside, the damper opens against the force of the coil spring due to the liquid pressure acting on the damper, but it also acts on the resistor. The liquid pressure applied to the damper is applied as a force to push the damper open, which causes the damper to open even wider.As a result, the liquid quickly flows out of the nozzle body, and the outflow speed slows down, causing air to flow out due to liquid agitation. High-speed filling is possible because no bubbles are generated.

Problems to be Solved by the Invention While the conventional devices have the advantages mentioned above,
There are the following problems.

If the spring force is strong, it will be difficult to open the damper, and if it is weak, it will be difficult to close the damper, making it difficult to adjust. In particular, if the filling liquid contains fibrous material, this will get entangled with the rotating parts of the damper, making it impossible to expect stable opening and closing of the damper.

An object of the present invention is to provide a liquid quantitative filling device that solves the above-mentioned problems.

Means for Solving the Problems The liquid metering filling device according to the present invention includes a vertical cylindrical filling nozzle whose upper end is covered with a lid and which is connected to a metering cylinder at the middle part of the upper and lower ends, and a vertical cylindrical filling nozzle that is connected to the lower end of the filling nozzle in the vertical direction. A damper that is swingably mounted, a damper opening/closing rod that is held movably up and down by the filling nozzle and whose upper end penetrates the lid and protrudes above it, and the free end of the damper and the lower end of the damper opening/closing rod are connected. a spring that urges the damper opening/closing rod upward; a locking arm arranged so that its tip can come into contact with the upper end surface of the damper opening/closing rod; and a swinging means for swinging the locking arm. The swinging means includes a plate cam fixed to a cam shaft arranged parallel to the support shaft of the rocker arm, a cam follower supported by the support shaft in parallel with the rocker arm, and a rocking means for swinging the cam follower. and a transmission means for transmitting the power to the damper opening/closing rod via the rocker arm in a disconnectable manner.

Function The liquid metering filling device consists of a vertical cylindrical filling nozzle whose upper end is covered with a lid and which is connected to a metering cylinder at the middle of the upper and lower ends, and a damper which is attached to the lower end of the filling nozzle so as to be able to swing vertically. and,
A damper opening/closing rod that is held in the filling nozzle so as to be able to rise and fall and whose upper end protrudes upward through the lid, a connecting member that connects the free end of the damper and the lower end of the damper opening/closing rod, and a damper opening/closing rod. A spring that is biased upward, and a rocker arm that is arranged so that its tip can come into contact with the upper end surface of the damper opening/closing rod.
Since the rocker arm is equipped with a rocking means for rocking the rocker arm, the rocker arm is moved downward by the rocking means at the same time or just before the filling liquid starts to be fed into the nozzle with the damper closed. When the rocker arm is rocked upward, the damper opening/closing rod is lowered against the force of the spring to open the damper, and then, before the feeding of the filling liquid is stopped, the rocker arm is rocked upward by the rocking means. , the relationship between the rocker arm and the damper opening/closing rod is severed, the damper opening/closing rod is raised by the spring, and the damper is closed.

Furthermore, the rocking means includes a plate cam fixed to a cam shaft arranged parallel to the support shaft of the rocker arm, a cam follower supported by the support shaft in line with the rocker arm, and a swinging means for controlling the rocking of the cam follower through the rocker arm. When the cam follower is oscillated by the plate cam and the oscillation of the cam follower is transmitted to the rocker arm by the transmission means,
The damper opening/closing rod is raised and lowered with a stroke commensurate with the cam lift of the plate cam.

Further, when the transmission of the transmission means is cut off, even though the cam follower swings as the camshaft rotates, the damper opening/closing rod does not move up and down, and the damper remains closed.

Embodiments Embodiments of the present invention will now be described with reference to the drawings.

As shown in FIG. 1, the liquid metering filling device includes a filling liquid tank 11, a metering cylinder 14 connected to the bottom of the filling liquid tank 11 via a connecting pipe 12 and having a built-in piston 13, and a metering cylinder 14. 14
a vertical cylindrical filling nozzle 15 connected to the filling nozzle 15; a damper 16 attached to the lower end of the filling nozzle 15 so as to be swingable in the vertical direction; and a damper opening/closing rod 17 held by the filling nozzle 15 so as to be able to move up and down; A connecting member 18 connecting the free end of the damper 16 and the lower end of the damper opening/closing rod 17, and upper and lower compression coil springs 1 urging the damper opening/closing rod 17 upward.
9 and 20.

The metering cylinder 14 has a T-shaped liquid guide pipe 21, and one of the two openings of the liquid guide pipe 21 is provided with an inlet side check valve 22, and the other outlet side check valve 23 is provided. It is being The filling nozzle 15 consists of an upper member 24, an intermediate member 25 and a lower member 26. The upper end of the upper member 24 is covered with a lid 27. An introduction pipe section 28 is provided at the middle of the height of the upper member 24, and is connected to the metering cylinder 14. An upper guide member 29 is interposed between the upper member 24 and the intermediate member 25, and a lower guide member 30 is interposed between the intermediate member 25 and the lower member 26, and these guide members 29 and 30 open and close the damper. The vertical movement of the rod 17 is guided. The entire upper member 24, intermediate member 25, and lower member 26
The upper part of the lower member 26 has a generally cylindrical shape, but the lower part of the lower member 26 has a rectangular cylindrical shape, and an inverted trapezoidal hanging guide plate 31 is formed on one of the two opposing sides of the square formed by the lower opening edge. are provided facing each other.

The damper 16 is a double door type damper consisting of a pair of opening/closing plates 32 sandwiched between both guide plates 31. The opening/closing plate 32 includes a rectangular bottom wall 33 and triangular side walls 34 that rise from both edges of the bottom wall 33 and are slidably in contact with the opposing inner surface of the guide plate 31.
It becomes more. A horizontal pin 35 is attached to the base end of the bottom wall 33.
is fixed, and both ends of the horizontal pin 35 are connected to the lower member 26.
It is rotatably received at the edge of the opening.
When both opening/closing plates 32 are closed, the bottom walls 33 of both opening/closing plates 32 have a V-shaped cross section.

The upper end of the damper opening/closing rod 17 passes through the lid 27 and projects above it. Upper and lower retainers 36 and 37 are fixed to the damper opening/closing rod 17 at positions above the upper and lower guide members 29 and 30, respectively.

The upper and lower springs 19, 20 are interposed between the retainers 36, 37 and the guide members 31, 32 so as to surround the damper opening/closing rod 17.

With reference to FIGS. 2 to 4, the damper opening/closing rod 17
A frame 41 and a horizontal camshaft 42 supported by the frame 41 are arranged to the right of the upwardly projecting end, and a plate cam 43 and a pulley 44 are fixed to this.
A belt 45 is hung around the pulley 44, and although not shown, the belt 45 is driven by a main shaft of a packaging machine including a filling device.
A support shaft 46 is supported by the frame 41 so as to be located slightly above the upper protruding end of the damper opening/closing rod 17 and the camshaft 42 and parallel to the camshaft 42.
This includes a cam follower 47 and a rocker arm 48.
are each supported in a swingable manner.

The cam follower 47 has triangular webs 49 that are arranged opposite to each other at intervals. A horizontal roller pin 50 is fixed at the lower right corner of the triangle formed by the web 49, and a roller 60 is attached to this, and this roller 60 is in contact with the contoured surface of the plate cam 43. A boss 51 fitted to the support shaft 46 is provided at the lower left corner of the triangle.
1 is provided with a left protruding ear 52. At the remaining corner of the triangle, the body 54 of the fluid pressure cylinder 53 is attached to the piston rod 5.
It is installed with the 5 side facing left.

The rocker arm 48 has a boss 56 fitted on the support shaft 46 while being sandwiched between the two bosses 51 of the cam follower 47, and extends leftward from this, with a roller 57 attached to its tip. This roller 57 is in contact with the upper end surface of the damper opening/closing rod 17. A horizontal bar stopper 58 is provided at a portion near the base of the rocker arm 48 so as to be perpendicular to the arm 18, and this is in contact with the left protruding ear 52 from above. Further, the rocker arm 48 is provided with an upwardly protruding ear 59, the tip of which is connected to a piston rod 55 of a fluid pressure cylinder 53.

During normal operation, the fluid pressure cylinder 53 is operated so that the piston rod 55 protrudes. Then, with the stopper 58 in contact with the left protruding ear 52, the cam follower 47 and the rocker arm 48 swing together, but are restrained from swinging separately. When the camshaft 42 is rotationally driven in this state, the plate cam 43 causes the cam follower 4 to rotate.
7 swings together with the rocker arm 48. As a result, the damper opening/closing rod 17 is pushed down by the rocker arm 48 and conversely pushed up by the springs 19, 20, and as a result, the damper opening/closing rod 17 is raised and lowered, causing the damper 16 to move up and down.
opens and closes. This allows normal filling operations to be performed.

In an emergency such as a container trouble, the piston rod 55 is operated with the fluid pressure cylinder 53 to retract. Then, the locker arm 48 rotates in a direction in which the stopper 58 separates from the left protruding ear 52, and when the locker arm 48 rotates by a predetermined angle, both arms 47 and 48 are restrained again. At this time, the tip roller 57 of the rocker arm 48 is
It is located above the position indicated by the chain line in FIG. 2, and there is a distance between the roller 57 and the damper opening/closing rod 17 that is larger than the distance that the roller 57 is moved by the cam 43. Therefore, although both arms 47 and 48 are swung by the plate cam 43, the damper opening/closing rod 17 does not move up or down, and the damper 16 does not open or close. This interrupts the filling operation.

Effects of the Invention According to the present invention, when the rocker arm is rocked downward by the rocker at the same time or just before the feeding of the filling liquid to the nozzle is started with the damper closed, the spring is activated. The damper opening/closing rod is lowered against the force to open the damper, and then, before the feeding of the filling liquid is stopped, the rocker arm is swung upward by the rocking means, and the rocker arm and the damper opening/closing rod are moved. When the relationship is severed, the damper opening/closing rod is raised by the spring and the damper is closed, so by increasing the force of the spring, the damper can be closed reliably without causing any trouble in opening the damper. I can do it.

In addition, when the cam follower is oscillated by the plate cam and the oscillation of the cam follower is transmitted to the rocker arm by the transmission means, the damper opening/closing rod is raised and lowered with a stroke commensurate with the cam lift of the plate cam. , the timing and degree of opening of the damper can be changed, making it possible to handle filling liquids with different properties.

Furthermore, when the transmission of the transmission means is cut off, even though the cam follower swings as the camshaft rotates,
Since the damper opening/closing rod does not move up and down and the damper remains closed, the filling operation can be interrupted even if the camshaft is constantly driven.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a partial vertical cross-sectional view, FIG. 2 is a partial front view including a fragmented cross-sectional view, FIG. 3 is a plan view of the same, and FIG. 4 is a perspective view of the same. . 14... Metering cylinder, 15... Filling nozzle, 16
... Damper, 17... Damper opening/closing rod, 18... Connection member, 19, 20... Spring, 27... Lid, 42... Camshaft, 43... Plate cam, 46... Horizontal shaft, 47... Cam follower, 48... Locker arm, 53... Fluid pressure cylinder.

Claims (1)

[Scope of Claims] 1. A vertical cylindrical filling nozzle 15 whose upper end is covered with a lid 27 and which is connected to the metering cylinder 14 at an intermediate portion between the upper and lower ends, and which is attached to the lower end of the filling nozzle 15 so as to be able to swing vertically a damper 16 that is movably held in the filling nozzle 15 and whose upper end extends through the lid 27 and protrudes above it; the free end of the damper 16 and the lower end of the damper open/close rod 17 are connected to each other; springs 19 and 20 that urge the damper opening/closing rod 17 upward; a locking arm 48 arranged such that its tip can come into contact with the upper end surface of the damper opening/closing rod 17; 48, and the rocking means includes a plate cam 43 fixed to a cam shaft 42 disposed parallel to the support shaft 46 of the rocker arm 48; A liquid quantitative filling device comprising: a cam follower 47 supported by a support shaft 46; and a transmission means for transmitting the swinging motion of the cam follower 47 to the damper opening/closing rod 17 via a rocker arm 48 in a disconnectable manner.