JPH0547042Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a liquid metering filling device used for filling containers with liquids such as fluid foods.

Prior Art This type of device includes, for example,
As disclosed in Publication No. 45192, there is a vertical cylindrical filling nozzle into which filling liquid is forcibly fed from a metering cylinder by the operation of a piston built into the metering cylinder, and an opening at the lower end of the filling nozzle that opens and closes. The damper can be opened by the hydraulic pressure of the filling liquid fed into the filling nozzle, but when the feeding is stopped and the damper is closed, the filling inside the filling nozzle Some devices are known that include a spring that biases the damper so that it can close against the gravity of the liquid.

In addition, as another device, for example,
As disclosed in Japanese Patent No. 44958, instead of the above-mentioned spring, the piston rod of the fluid pressure cylinder is directly connected to the damper via a link mechanism, and thereby,
A device in which a damper is forcibly opened and closed is known.

Problems to be Solved by the Invention In the former conventional device described above, it is necessary to adjust the force of the spring to a strength suitable for both opening and closing, but this is not an easy task. If the spring force is too strong, it will be difficult to open the damper, and if the spring force is too weak, it will be difficult to close the damper. 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.

Further, in the latter conventional device, it is necessary to match the timing of feeding the filling liquid from the metering cylinder to the filling nozzle with the timing of opening the damper, but this is not easy. If the timing is too early, air bubbles may be sucked into the filling liquid, and if the timing is too late, there is a risk that filling defects such as splashing of the filling liquid may occur.

The purpose of this 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 this invention has a vertical cylindrical filling nozzle into which filling liquid is forcibly fed from a metering cylinder by the operation of a piston built in the metering cylinder, and a filling nozzle. The damper can be opened by the hydraulic pressure of the filling liquid fed into the filling nozzle, but when the feeding is stopped and the damper is closed. is a liquid metering filling device comprising a spring that urges the damper to close the tamper against the gravity of the filling liquid in the filling nozzle, the lower end of which connects the connecting member to the swinging end of the damper. a vertically lowering lifting rod having a downward engaging portion at the upper end thereof, and an upward engaging portion at the lower end, the upward engaging portion being arranged so as to be able to engage the downward engaging portion from below. The upper limit is the position of the vertically rising/lowering rod when the vertically rising/lowering rod is connected to the upper end of the rising/lowering rod, and the downwardly facing engaging portion is engaged with the upwardly facing engaging portion when the damper is closed. Then, the position of the lifting rod when the downward engaging part is engaged with the upward engaging part when the damper is opened is set as the lower limit, and the fluid pressure cylinder that raises and lowers the lifting rod and the feeding of the filling liquid are stopped. When the rising/lowering rod rises from the lower limit to the upper limit, then
and a control means for controlling the hydraulic cylinder so that the lifting rod descends from the upper limit to the lower limit before the feeding of the filling liquid is started, and a spring surrounds the lowering lifting rod to lower the lifting rod. It is characterized in that it is interposed between a fixed retainer and a fixed part within the filling nozzle.

Function: The quantitative filling device according to this invention includes a vertically descending lifting rod whose lower end is connected to the swinging end of the damper via a connecting member and whose upper end has a downward engaging portion, and whose lower end has an upward engaging portion. , a vertically rising/lowering rod disposed so that the upward engaging part can engage with the downwardly facing engaging part from below, and a piston rod connected to the upper end of the rising/lowering rod, which engages upwardly when the damper is closed. The upper limit is the position of the lifting rod when the downward engaging part is engaged with the joint part, and the position of the lifting rod when the downward engaging part is engaged with the upward engaging part when the damper is released. A hydraulic cylinder that raises and lowers the lifting rod with control means for controlling the hydraulic cylinder so that the rod is lowered from an upper limit to a lower limit, and a spring is provided between a retainer surrounding and fixed to the lowering rod and a fixed portion in the filling nozzle. Therefore, when the feeding of the filling liquid is stopped and the lifting rod is raised from the lower limit to the upper limit by the hydraulic cylinder, the damper is forcibly closed, and then the feeding of the filling liquid is stopped. If the lifting rod is lowered from the upper limit to the lower limit before the start of the filling nozzle, the action transmission path of the hydraulic cylinder to the damper is cut off and the damper is kept closed only by the spring. The damper is opened by the hydraulic pressure sent to the damper.

Embodiment An embodiment of this invention will be described below 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 able to swing vertically, and a lowering/lowering rod 17 held at the bottom of 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 lowering/lowering rod 17, and the lowering/lowering rod 1.
Compression coil spring 19 biasing 7 upward
and a lifting rod 20 which is held at the upper part of the filling nozzle 15 so as to be movable up and down so as to be in line with the lowering rod 17.

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 is provided with an outlet-side check valve 23. ing. 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 sandwiched between the upper member 24 and the intermediate member 25, and a lower guide member 30 is sandwiched between the intermediate member 25 and the lower member 26. No. 17 is designed to guide you in going up and down. 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 is attached to one of the two opposing sides of the square formed by the lower opening edge. 31 are provided facing each other. The damper 16 is a double door type damper made up of a pair of opening/closing plates 32 sandwiched between both guide plates 31.
The opening/closing plate 32 consists of a square bottom wall 33 and a triangular side wall 34 rising from both edges thereof and slidably contacting the opposing inner surface of the guide plate 31. A horizontal pin 35 is fixed, and both ends of the horizontal pin 35 are rotatably received at the opening edge of the lower member 26. When both opening/closing plates 32 are closed, the bottom wall 3 of both opening/closing plates 32
3 has a V-shaped cross section. A retainer 36 is fixed at a position above the lower guide member 30 on the lower lifting rod 17, and a spring 19 is interposed between the retainer 36 and the lower guide member 30 so as to surround the lower lifting rod 17. . Spring 1
The strength 9 is such that when the inside of the filling nozzle 15 is filled with the filling liquid, the damper 16 can be kept in the closed state against the gravity of the filling liquid. The upper end of the lifting rod passes through the lid 27 and projects above it.

As shown in FIGS. 2 and 3, a flat plate-shaped upper protrusion 41 is integrally provided at the upper end of the lower vertical rod 17, and a lower elevating rod 17 is attached to this.
A long hole 42 extending in the axial direction is provided, and a portion of the upper protrusion 41 above the long hole 42 serves as a downward engaging portion 43 . The length of the elongated hole 42 is slightly longer than the vertical stroke of the lower lifting rod 17 as the damper 16 opens and closes. On the other hand, the ascending and descending rod 2
0 is provided with a slit-like recess 44 in which the upper protrusion 41 is fitted, and the recess 44
A horizontal pin 45 is fixed on both side walls of the horizontal pin 45, and this pin 45 is inserted into the elongated hole 42, and the insertion portion thereof engages the downward engaging portion 43 from below. It is said that Also,
A large-diameter portion 47 is provided at one end of the pin 45, and a small-diameter portion 48 is provided near the other end. Cut 49,
A collar 51 having a diameter of 50 is fitted over the lower end of the lifting rod 20.

As shown in FIG. 4, a horizontal shaft 61 is disposed on the side of the upwardly projecting end of the lifting rod 20, and a lever 62 is supported on the horizontal shaft 61. One end of the lever 62 is connected by a pin 63 to an upwardly projecting end of the lifting rod 20, and the other end is connected by a pin 64 to a piston rod 66 of a hydraulic cylinder 65.

When the hydraulic cylinder 65 is actuated to swing the lever 62, the lifting rod 20 moves up and down. Its lifting stroke is slightly larger than the lifting stroke of the lower lifting rod 17 and approximately equal to the length of the elongated hole 42. When the lifting rod 20 is at the upper limit position of its lifting stroke, both engaging portions 43, 4
6 are engaged with each other, the lower elevating rod 17 is also at its upper limit position of its elevating stroke, and the damper 16 is closed.

It is now assumed that the lifting rod 20 is at the upper limit position of its lifting stroke, the damper 16 is closed, and the inside of the filling nozzle 15 is filled with filling liquid. When the filling liquid is forcibly fed from the metering cylinder 14 to the filling nozzle 15, the liquid pressure tries to open the damper 16, but the engaging parts 43 and 46 are engaged with each other and the lowering/lowering rod 1
Since damper 7 cannot be lowered, damper 16 cannot be opened. Therefore, before feeding the filling liquid from the metering cylinder 14 to the filling nozzle 15, the lifting rod 20 is lowered from the upper limit position to the lower limit position. Then, the engagement between the engaging portions 43 and 46 is released, and the lowering/lowering rod 17 can be freely lowered. When the filling liquid is forcibly fed from the metering cylinder 14 to the filling nozzle 15 in this way, the damper 16 is opened by the liquid pressure, and the filling liquid inside the filling nozzle 15 flows out and is filled into a container or the like. be done. In this way, the lifting rod 20 is raised at or just before the filling is completed. Then, in the process of rising, both the engaging parts 43, 46
is engaged again, and as the lifting rod 20 rises, the lowering lifting rod 17 also rises, and as a result, the damper 1
6 is forcibly closed.

Effects of the invention According to this invention, when the feeding of the filling liquid is stopped and the lifting rod is raised from the lower limit to the upper limit by the fluid pressure cylinder, the damper is forcibly closed, so the spring force Even if you weaken
Since the damper is reliably closed, it is easy to set the strength of the spring force.

In addition, if the lifting rod is lowered from the upper limit to the lower limit after closing the tamper and before the feeding of the filling liquid is started, the action transmission path of the hydraulic cylinder to the damper is cut off, and the damper springs. Since the damper is kept closed by the hydraulic cylinder, the damper is opened by the liquid pressure sent to the filling nozzle, so it is necessary to match the timing of feeding the filling liquid and the timing of opening the damper with the fluid pressure cylinder. There is no risk of filling defects due to mismatching.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; FIG. 1 is a partial vertical sectional view, FIG. 2 is an enlarged vertical sectional view of a part of FIG. 1, and FIG. 3 is an exploded perspective view of the same part. ,
FIG. 4 is an enlarged side view of a part of FIG. 1 different from FIG. 2. FIG. 13... Piston, 14... Metering cylinder, 1
5... Filling nozzle, 16... Damper, 17... Lifting/lowering rod, 18... Connection member, 19... Spring,
20... lowering/lowering rod, 43, 46... engaging portion,
62...Lever, 65...Fluid pressure cylinder.

Claims (1)

[Claims for Utility Model Registration] A vertical cylindrical filling nozzle 15 into which filling liquid is forcibly fed from the metering cylinder 14 by the operation of a piston 13 built therein, and a lower end opening of the filling nozzle 15. The damper 16 can be opened and closed by vertically swinging, and the damper 16 can be opened by the hydraulic pressure of the filling liquid fed into the filling nozzle 15, but when the feeding is stopped and the damper 16 is closed, a spring 19 that urges the damper 16 to close the tamper 16 against the gravity of the filling liquid in the filling nozzle 15; A vertically lowering lifting rod 17 is connected to the end via a connecting member 18 and has a downward engaging portion 43 at the upper end, and has an upward engaging portion 46 at the lower end, and the upward engaging portion 46 is connected to the downward engaging portion 43 It has a vertical lifting/lowering rod 20 arranged so as to be engageable from below, and a piston rod 66 connected to the upper end of the lifting/lowering rod 20, and has a downward engaging part 46 in the upward engaging part 46 when the damper is closed. The upper limit is the position of the lifting rod 20 when the damper 43 is engaged, and the lower limit is the position of the lifting rod 20 when the downward engaging part 43 is engaged with the upward engaging part 46 when the damper is released. a hydraulic cylinder 65 for raising and lowering the lifting rod 20, and a hydraulic cylinder 65 for raising and lowering the lifting rod 20, and a hydraulic cylinder 65 for raising and lowering the lifting rod 20 from the lower limit to the upper limit when feeding of the filling liquid is stopped, and then, before feeding of the filling liquid is started, control means for controlling the hydraulic cylinder 65 so that the lifting rod 20 descends from the upper limit to the lower limit; and a fixed part within the filling nozzle 15. A liquid quantitative filling device characterized in that: