JPH068080Y2 - Filling valve of filling machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a filling valve of a filling machine attached to the bottom of a liquid tank.

(Prior Art) A filling valve of a conventional filling machine will be described with reference to FIG.
(1) is a rotatable liquid tank (bottom), (7) is a valve body, and the valve body (7) penetrates the bottom of the liquid tank (1) in the vertical direction and is clamped by a clamp (3). It is fixed to the bottom of the tank (1) in a suspended state. The valve body (7) is located at equal intervals on the liquid tank (bottom) (1).

The liquid tank (1) is hermetically sealed, and the upper space (B) in the liquid tank (1) is in a vacuum state (a pressure of around -50 cmAq) enough to suck up the liquid in the air pipe (5). State).

The upper end of the air pipe (5) projects above the liquid level in the liquid tank (1), and the lower end is formed in an umbrella shape. The air pipe (5) is fixed to the valve body (7) via the snap rings (6) and (6 ').

(8) is a sliding valve, and the sliding valve (8) is a compression spring (11).
The lower end portion (24) of the sliding valve (8) contacts the umbrella-shaped lower end portion of the air pipe (5) by being urged downward by.

(10) is a centering guide member, and the centering guide member (10) moves up and down by guiding the mouth of the container (A).

Reference numeral (9) is a guide ring, which serves as a guide tube for the centering guide member (10) and is fixed to the valve body (7) with screws or the like.

(12) is a seal packing, and the seal packing (12) is made of an elastic body such as rubber to seal the mouth of the container (A).

The part on the left side of the center line in Fig. 5 shows the state without the container (A). At this time, the lower end portion (24) of the sliding valve (8) is the umbrella-shaped lower end of the air pipe (5). Part (valve seat)
The liquid in the liquid tank (1) is stopped by the lower end (24) of the sliding valve (8). (22) is a liquid passage and (23) is a hole communicating with the atmosphere.

FIG. 6 shows another conventional example of the filling valve,
In this example, the air tube (5) is screwed onto the air tube (5)
It is fixed to the valve body (7) via (24).

Yet another conventional example of the filling valve is described in Japanese Utility Model Laid-Open No. 61-193095. This filling valve has a pin insertion hole on the top of the valve body,
The pin inserted in this pin insertion hole is engaged with the recess provided in the air pipe to support the air pipe, and the leaf spring insertion vertical hole is provided in the upper part of the valve body to form a substantially inverted U-shaped special While inserting one side of the shaped leaf spring (thin leaf spring having elasticity) into the same vertical hole, engage the remaining one side with a recess provided in the middle of the pin to prevent the pin from slipping out. I have to.

(Problems to be Solved by the Invention) In the conventional filling valve shown in FIG. 5, the air pipe (5) is fixed to the valve body (7) through the snap rings (6) and (6 ′), When removing the air pipe (5) from the valve body (7), a special tool (plier) is required to remove the snap rings (6) and (6 '). Moreover, since the snap rings (6) and (6 ') are made of SUS304 on the sanitary side, if they are removed many times, they lose elasticity and become unnecessary.

Further, in the conventional filling valve shown in FIG. 6, the air pipe is
(5) is fixed to the filling valve body (7) via a nut (24) screwed to the threaded portion of the air tube (5), and when removing the air tube (5) from the valve body (7). , A tool such as a spanner for rotating the nut (24) is required. Further, the presence of the nut (24) in the liquid contact portion (air pipe) of the air pipe (5) and the valve body (7) is not preferable for sanitary reasons.

Further, in the filling valve described in Japanese Utility Model Laid-Open No. 61-193095, the leaf spring is easily broken, so that the valve is repeatedly used.
When the leaf spring was broken, the pin would come out and the air tube would come out. In addition, a pin insertion hole is provided in the upper part of the valve body, the pin inserted in this pin insertion hole engages with the recess provided in the air tube to support the air tube, and a vertical hole for leaf spring insertion is provided in the upper part of the valve body. And one side of the leaf spring formed in a substantially inverted U shape is inserted into the vertical hole, while the remaining one side is engaged with a recess provided in the middle of the pin to prevent the pin from coming out. Has a complicated structure,
There is a drawback that it takes a lot of time to align the pin with the recess of the air tube and the position of the leaf spring with the recess of the pin, and it takes a lot of time for assembly.

The present invention is proposed in view of the above-mentioned problems, and the object of the present invention is to simplify the structure and facilitate the assembly. No special tool is required to attach and detach the air tube to the valve body. Another object is to provide a filling valve for a filling machine that can further improve durability.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a liquid tank in a vacuum state when an air in the container is supplied through an air return passage provided inside the pipe when the container is supplied. An air tube that goes back in,
When the container is supplied, the lower end of the same moves upward from the lower end of the air pipe, and the sliding valve that fills the container in the liquid tank with the liquid in the liquid tank through a liquid passage provided around the air pipe, In a filling valve of a filling machine having a valve body that slidably supports a sliding valve in the vertical direction, and a spring that biases the sliding valve and a downward direction, a bottom part of the liquid tank is penetrated in the vertical direction. The air pipe is inserted into the valve body fixed to the bottom portion from below, and the flange portions provided at the upper and lower intermediate portions of the air pipe are brought into contact with the shoulder portion of the valve body, and the wall portion is not elastically deformed. By inserting the horseshoe-shaped spacer from the side into an annular groove provided in the air pipe above the flange, and bringing the horseshoe-shaped spacer into contact with the upper end of the valve body, On the valve body and place a cylindrical cap on the air pipe. The same cap prevents the same horseshoe spacer from coming out, and an O-ring is interposed between the cylindrical cap above the horseshoe spacer and the air pipe through an annular groove. is doing.

(Operation) The filling valve of the filling machine of the present invention is configured as described above, and the air pipe is inserted from below into the valve body which is vertically penetrated through the bottom of the liquid tank and fixed to the bottom. An annular groove in which a collar portion provided in the upper and lower intermediate portion of the air pipe is brought into contact with the shoulder portion of the valve body, and a thick horseshoe spacer that does not elastically deform is provided in the air pipe above the collar portion. Position the air pipe to the valve body by abutting the horseshoe spacer on the upper end of the valve body, then insert the cylindrical cap into the air pipe from above. The cap prevents the horseshoe spacer from coming out. Then, an O-ring is interposed between the cylindrical cap and the air tube above the horseshoe-shaped spacer via an annular groove, and the assembly is completed.

(Example) Next, a filling valve of the filling machine of the present invention will be described with reference to an example. 1 and 3 show a first embodiment of the filling valve,
2 and 4 show a second embodiment of the filling valve.

(First Embodiment) First, the filling valve shown in Figs. 1 and 3 will be described. (1) is a liquid tank (bottom), (37) is a valve body,
(37) vertically penetrates the bottom of the liquid tank (1) and is fixed to the bottom of the liquid tank (1) in a hanging state by a clamp. The valve body (7) is located at equal intervals on the liquid tank (bottom) (1).

(35) is an air pipe inserted into the valve body (37) from below,
Reference numeral (35a) is a flange provided on the outer peripheral surfaces of the upper and lower intermediate portions of the air pipe (35), and the flange (35a) is configured to contact the shoulder portion of the valve body (37). (35b) is an annular groove provided on the outer peripheral surface of the air pipe (35) above the flange (35a).

(30) Thick horseshoe spacer that does not elastically deform, (30a)
Is a U-shaped groove provided in the horseshoe-shaped spacer (30), and the horseshoe-shaped spacer (30) around the U-shaped groove (30a) is the annular groove (35b) of the air pipe (35). Is adapted to engage with.

(31) is a cylindrical closed cap, (32) is the same cap (31)
The cap (31) is inserted into the air pipe (35) from above with an O-ring fitted in an annular groove provided on the inner peripheral surface of the horseshoe spacer (30) and the valve body (37). The top is the same cap
O-ring (32) on the side of the cap (31) covered with (31)
Is inserted into the annular groove (35c) provided on the outer peripheral surface of the air pipe (35), and the annular groove (35c) is provided between the cap (31) and the air pipe (35).
The O-ring (32) is inserted through the.
At that time, due to the friction resistance of the crushing margin of the O-ring (32),
The cap (31) is held so as not to move vertically.

Next, the operation of the filling valve shown in FIGS. 1 and 3 will be specifically described.

The air pipe (35) is inserted from below into the valve body (37) that is fixed to the bottom of the liquid tank (bottom) (1) by passing through it in the vertical direction. The collar portion (35a) is brought into contact with the shoulder portion of the valve body (37), and the horseshoe spacer (30) having a thick wall that does not elastically deform is attached to the air pipe (35a) above the collar portion (35a). (35) is inserted into the annular groove (35b) from the side and the horseshoe spacer (30) is attached to the valve body (37).
The air pipe (35) is positioned on the valve body (37) by abutting the upper end of the valve.

Next, the cylindrical cap (31) is inserted into the air pipe (35) from above, and the inner peripheral surface of the cap (31) is fitted with the horseshoe-shaped spacer.
Contact the outer peripheral surface of (30) to prevent the same horseshoe spacer (30) from coming out. The cap (31) above the horseshoe-shaped spacer (30) and the air pipe (35) are capped via an annular groove (35c) provided on the outer peripheral surface of the air pipe (35).
The assembly of the filling valve is completed by inserting the O-ring (32) on the (31) side.

(Second Embodiment) Next, the filling valve shown in FIGS. 2 and 4 will be described. (35) is an air pipe, (37) is a valve body, and these portions are configured in the same manner as described above.

(40a), which is a thick horseshoe spacer that does not elastically deform (40)
Is a U-shaped groove provided in the horseshoe spacer (40), and (40b) is a chamfered portion provided on the back surface of the horseshoe spacer (40).

(41) is a short cylindrical open-type cap, (41a) is a convex portion protruding downward from the cap (41), the convex portion (41a) is the chamfered portion (40b) of the horseshoe-shaped spacer (40). ).

Next, the operation of the filling valve shown in FIGS. 2 and 4 will be specifically described.

Insert the air pipe (35) into the valve body (7) fixed to the bottom of the liquid tank (bottom part) (1) in the vertical direction, and install it in the upper and lower middle part of the air pipe (35). The collar portion (35a) is brought into contact with the shoulder portion of the valve body (37), and the horseshoe spacer (40) having a thick wall that does not elastically deform is attached to the air pipe (above the collar portion (35a)). (35) is inserted into the annular groove (35b) from the side and the horseshoe spacer (40) is attached to the valve body (37).
The air pipe (35) is positioned on the valve body (37) by abutting the upper end of the valve.

Next, the cylindrical cap (41) is inserted into the air pipe (35) from above, and the convex portion (41a) protruding downward from the cap (41) is chamfered (40b) of the horseshoe spacer (40). To prevent the horseshoe-shaped spacer (40) from coming out. And the cap (41) above the horseshoe spacer (40)
And the air pipe (35), an O-ring (32) on the side of the cap (41) is provided via an annular groove (35c) provided on the outer peripheral surface of the air pipe (35), and a filling valve is provided. Complete the assembly. that time,
Due to the friction resistance of the crushing margin of the O-ring (32), the same cap
(41) is held so that it does not move vertically.

The cylindrical cap includes a closed cylindrical cap (31) shown in FIGS. 1 and 3 and an open cylindrical cap (41) shown in FIGS. 2 and 4, which are selected depending on the liquid type. That is, the open cylindrical cap (41) shown in FIGS. 2 and 4 has a shallower hole than the closed cylindrical cap (31) shown in FIGS. 1 and 3, and therefore, when cleaning with a brush or the like. ,
Even if the liquid has poor cleaning properties, the open type cylindrical cap (41) shown in FIGS. 2 and 4 is easier to clean. The second and fourth
The open cylindrical cap (41) shown in the figure is easier to spread the cleaning liquid to the horseshoe-shaped spacer (40) during sterilization cleaning (for example, sterilization cleaning with cleaning liquid with the filling valve attached). , Even if the liquid type has poor cleaning properties,
Easy to wash. On the other hand, the closed cylindrical cap (31) is used when handling a liquid type having good cleaning properties.

Further, the present filling valve can be applied to non-negative pressure type filling valve and pressurizing type filling valve other than the negative pressure type filling valve.

(Effect of the Invention) As described above, the filling valve of the filling machine of the present invention penetrates the bottom of the liquid tank in the vertical direction and inserts the air pipe from below into the valve body fixed to the bottom. The flange part provided in the upper and lower intermediate parts is brought into contact with the shoulder part of the valve body, and a horse-shoe spacer of a thick wall that does not elastically deform is laterally placed in an annular groove provided in the air pipe above the flange part. By inserting the same to the upper end of the valve main body, the air pipe is positioned in the valve main body, then the cylindrical cap is inserted into the air pipe from above, The cap prevents the same horseshoe spacer from coming out. Since the assembly is completed by inserting an O-ring through the annular groove between the cylindrical cap and the air pipe above the horseshoe-shaped spacer, the above-mentioned conventional filling valve (actually opened 61- (See Japanese Laid-Open Patent Publication No. 193095), there is no need to provide a pin insertion hole or a leaf spring insertion vertical hole in the upper part of the valve body, and the structure can be simplified, and the assembling work of the filling valve can be performed from below the air pipe. The filling valve can be easily assembled by only simple operations such as insertion, insertion of the horseshoe spacer from the side, and insertion of the cylindrical cap from above.

Also, as described above, the assembling work of the filling valve is only the simple work of inserting from below the air pipe, inserting the horse-shoe spacer from the side, and inserting the cylindrical cap from above. No special tool is required to attach and detach to the valve body.

In addition, a thick horseshoe-shaped spacer that does not elastically deform and a cylindrical cap are used to position the air tube, and even if it is used repeatedly, it loses elasticity like a snap ring and becomes unusable, The durability of the filling valve can be improved without breaking like a leaf spring.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing a first embodiment of a filling valve of a filling machine according to the present invention, FIG. 2 is a vertical sectional side view showing a second embodiment of the same filling valve, and FIG. FIG. 4 is an exploded perspective view of the filling valve, FIG. 4 is an exploded perspective view of the filling valve of FIG.
FIG. 5 is a vertical sectional side view showing a filling valve of a conventional filling machine,
FIG. 6 is a vertical side view showing another conventional example. (1) …… Liquid tank, (30) or (40) …… Horse spacer, (31) or (41) …… Cylindrical cap, (32) …… O ring, (35) …… Air tube , (35a) …… Mitsuba, (35b) (35c)…
… Annular groove, (37) …… Valve body.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Creator Ryoji Tanaka 1 Takadori, Iwazuka-cho, Nakamura-ku, Nagoya-shi, Aichi Mitsubishi Heavy Industries, Ltd. Nagoya Machinery Works (56) Bibliography 61-193095 (JP, U) ) Japanese Patent Publication Sho 39-21613 (JP, B1)

Claims (1)

[Scope of utility model registration request] 1. An air pipe for returning air in a container to a liquid tank in a vacuum state through an air return passage provided inside the pipe when the container is supplied, and a lower end portion when the container is supplied. A sliding valve that moves upward from the lower end of the air pipe to fill the liquid in the liquid tank into the container through a liquid passage provided around the air pipe, and the sliding valve can slide vertically In a filling valve of a filling machine having a valve body that supports the valve body and a spring that urges the sliding valve downward, the valve body is fixed to the valve body by vertically penetrating the bottom portion of the liquid tank. Insert the air pipe from below, make the flanges provided at the upper and lower intermediate parts of the air pipe contact the shoulders of the valve body, and use a thick horseshoe-shaped spacer that does not elastically deform due to the flange. Insert it from the side into the annular groove provided in the upper air pipe, The air pipe is positioned on the valve body by abutting the horseshoe spacer on the upper end of the valve body, and a cylindrical cap is inserted into the air pipe from above, and the horseshoe-shaped spacer is used by the cap. The spacer is prevented from coming out, and an O-shaped groove is provided between the cylindrical cap and the air pipe above the horseshoe spacer to prevent the spacer from coming out.
A filling valve for a filling machine characterized by having a ring interposed.