JP2014084133A - Bag type drinking water server and needle for server - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a needle which smoothly sticks a bag storing drinking water to cause the drinking water to flow out, and to provide a bag type drinking water server which uses the needle.SOLUTION: A needle for a bag type liquid server has a cylindrical needle body 61 where a tip 63 is sharpened and a water intake hole 65 is opened penetrating therethrough on a side surface thereof. In the needle for the bag type liquid server, roughening treatment is performed on an entire outer surface of the needle body and the outer surface has fine irregularities 64.

Description

  The present invention relates to a needle for a server that smoothly stabs a bag containing drinking water and causes the drinking water to flow out, and a bag-type drinking water server using the needle.

  2. Description of the Related Art A drinking water server that sets a bottle container containing drinking water on a server body, replenishes drinking water, and dispenses drinking water is used in offices and homes.

  If the bottle container containing drinking water is composed of a large resin molded bottle, the bottle can be moved and stored without leaking until the drinking water is replenished. It has to be kept until time, takes up space and gets in the way.

Therefore, the drinking water server of Patent Document 1 is made of a multi-layered resin sheet that is strong and tear-proof treated by bonding an unstretched nylon sheet or polyethylene sheet as a container instead of a resin molded bottle. A flexible bag (9) is disclosed.
Such a flexible bag (9) is moved and stored without being broken until drinking water is replenished. When replenishing drinking water, the bag (9) is accommodated in the holder (4) as shown in FIG. At the bottom of the holder (4), a needle (6) having a cylindrical needle body (61) having a conical tip and a conical surface and a smooth surface is attached to the holder (4). Until 4) is set on the server body (2), the needle body (61) is hidden under the holder bottom plate (43), but the holder (4) is set on the server body (2). Thus, as shown in FIG. 3, the needle (6) rises into the holder (4) by its own weight of the bag (9), and the bag (9) pushes the needle body (61). As a result, the needle body (61) pierces the bag (9), and the drinking water (11) flows into the needle body (61) through the water intake hole provided in the needle body (61), thereby the server body (2). The tank (21) is replenished with drinking water (11). Even if a hole is opened in the resin sheet (91) constituting the bag (9) by the needle body (61), the hole is not torn due to the multilayer structure subjected to the tear prevention treatment, and the resin sheet ( 91) does not leak by tightening the outer surface of the needle body (61).

  After the entire amount of the drinking water (11) in the bag (9) has been consumed, the user only has to collect the bag (9), shrink it down and discard it.

JP 2011-44646 A

  However, when the holder (4) is set on the server body (2) and the needle body (61) is pushed by its own weight, the needle body (61) pierces the bag (9). The resin sheet (91) constituting the bag (9) tightens the outer surface of the needle body (61) to increase the frictional resistance, and the resin sheet (91) stops in the middle of the needle body (61) and penetrates deeply. There was not.

In particular, as shown in FIG. 7, when the resin sheet (91) stops in the middle of the water intake hole (65) of the needle body (61) and does not reach the lower part of the needle body (61), the bag (9) As shown by the arrow G, water (11) once enters the hollow of the needle body (61) from the water intake hole (65), but part of the water (11) flows out of the water intake hole (65) to the outside. Then, the problem that the liquid accumulated in the holder (4) overflowed and contaminated the surrounding area occurred.
Even if the user notices that the needle body (61) is not sufficiently pierced, the user must apply a load to the bag (9) to pierce the needle body (61) deeply. It is troublesome.

  An object of the present invention is to set a bag containing drinking water, the needle smoothly pierces and penetrates the bag and replenishes the server body with drinking water, and a bag-type beverage using the same To provide a water server.

The needle for bag type liquid server according to the present invention is:
In a needle for a bag-type liquid server having a cylindrical needle body with a leading end pointed and a water intake hole penetrating through the side,
The outer surface of the needle body is roughened on the entire surface, and has fine irregularities compared to a needle body having a conventional smooth surface.

According to the needle of the present invention, when the bag is set on the server body and the resin sheet is pierced by the sharpness of the tip of the needle, the needle body provided with fine irregularities on the outer surface is Without stopping in the middle, it is possible to pierce and pierce smoothly and softly with just the weight of the bag. Therefore, there is no possibility of liquid leakage from the water intake hole to the outside.
In addition, the user does not need to add a puncture by applying a load to the resin sheet to pierce the needle deeply.

It is a front view of a water server. It is an expanded sectional view of the principal part of FIG. 1 before setting a bag. It is an expanded sectional view of the principal part of FIG. FIG. 4 (a) is a plan view of a needle body, and FIG. 4 (b) is a front view of the needle according to an embodiment of the present invention. It is a longitudinal cross-sectional view of the needle of the present invention. It is an expanded sectional view of the principal part of FIG. It is an expanded sectional view which shows the incomplete puncture state by the conventional needle. It is explanatory drawing of the measuring method of the piercing force and passing force of the needle with respect to the resin sheet.

  Hereinafter, the water server (1) which is one embodiment of the bag-type drinking water server provided with the needle (6) of the present invention will be specifically described with reference to the drawings. The configuration of the water server (1) is the same as that disclosed in Patent Document 1 and known commercially, except for the configuration of the needle (6).

  As shown in FIGS. 1 to 3, the water server (1) includes a server main body (2) in which water (11) is replenished to the tank (21) and water (11) is dispensed, and the server main body (2). A holder (4) that is detachably installed at the top of the bag and accommodates a bag (9) filled with water (11), and is attached to the lower center of the holder (4). The holder (4) is attached to the server body (2). When it is set, the needle body (6) is pushed up by the server body (2), protrudes from the holder bottom plate (43), and pierces the bag (9) in the holder (4).

<Bag (9)>
A bag (9) used as a container in the present invention is a sealed bag body constituted by a conventionally known resin sheet (91) subjected to a tear prevention treatment.
In this embodiment, about 2 L of fresh water (11) is accommodated.

<Holder (4)>
As shown in FIGS. 2 and 3, the holder (4) forms an accommodation space for the bag (9) by the bottom plate (43) and the peripheral wall (47), and opens from the upper opening from which the lid (41) is removed. The bag (9) is accommodated. The holder (4) is positioned and set with respect to the upper part of the server body (2) by legs (49) (49) extending downward from the peripheral wall (47).
As shown in FIG. 6, an adapter (51) for attaching the needle (6) is detachably disposed on the bottom plate (43) of the holder (4).

  The adapter (51) accommodates the needle (6) so as to be movable up and down, and the needle (6) is held by the spring (59) in the adapter (51) until the holder (4) is set in the server body (2). (6) is pushed down and biased, and the tip of the needle (6) is lowered into the adapter (51). When the holder (4) is set in the server main body (2), the adapter (51) is put on the push-up cylinder (27) arranged on the upper part of the server main body (2), and the push-up cylinder (27) is attached to the bottom of the adapter (51). The needle (6) is pushed up through the hole (57) of the needle, the needle (6) is pushed up, and the tip of the needle (6) is protruded from the bottom plate (43) of the holder (4).

<Server body (2)>
A holder (4) containing a bag (9) is detachably set on the upper part of the server body (2), as shown in FIGS.
Inside the server body (2) are a tank (21) for storing water (11) discharged from the bag (9) and a cooler (not shown) for cooling the water (11) in the tank (21). And a heater (not shown) for heating.
The server body (2) is provided with supply ports (23) and (25) for heating or cooling the water extracted from the tank (21) and supplying cold water and hot water, respectively. Water is poured into (15) etc.

  A pipe (29) for guiding water (11) flowing out from the adapter (51) to the tank (21) extends into the tank (21) at the upper part of the server body (2).

<Needle (6)>
As shown in FIGS. 4 and 5, the needle (6) has a configuration in which a cylindrical needle body (61) projects from the upper surface of a hollow stepped base (71). The needle body (61) has a tip (63) that is closed and pointed, and has a water intake hole (65) on the side surface and communicates with the hollow inside the pedestal (71). A water passage hole (78) is opened at the bottom of the pedestal (71), and the water (11) flowing into the pedestal (71) from the needle body (61) flows through the water passage hole (78) and the adapter (51). Through (57), it is led to the pipe (29) of the server body (2) and stored in the tank (2).

  The needle body (61) can be made of acrylonitrile / butadiene / styrene (ABS) resin or acrylonitrile / styrene (AS) resin.

Around the joint between the needle body (61) and pedestal (71), there is a gap between the outer periphery of the needle body (61) and the needle insertion hole (54) of the adapter (51) through which the needle body (61) is inserted. A watertight packing (68) is provided.
Around the proximal end of the water discharge tube (79) of the needle (6) that discharges water toward the hole (57) at the bottom of the adapter (51), the outer periphery of the water discharge tube (79) and the hole (57 of the adapter (51)) ) Is provided with a packing (74) that tightly closes the space between the two.

  The holder (4), server main body (2), and bag (9) described above are conventionally known configurations, but the present invention is characterized in that the needle main body (61) is improved as follows. .

The outer surface of the needle body (61) is made into an infinite number of irregularities (64) by roughening using sandpaper No. 320 to No. 600.
The size of the unevenness (64) forming the surface roughness is such that the outer surface of the needle main body (61) punctures the bag (9) when the resin sheet (91) is broken by the needle main body (61). There is no particular limitation as long as it is tightened around the hole so that water (11) does not leak.
The water intake hole (65) is opened through the cylindrical portion or the conical portion of the needle body (61) as a round hole having a diameter of about 3 mm at two positions with a circumferential interval therebetween, and the needle body (61) It communicates with the hollow.

  The needle (6) of the present invention has a rough surface with small irregularities (64) on the entire surface including the side surface of the needle body (61) and the tapered surface with a sharp tip (63) compared to a smooth surface before processing. When the holder (4) is set in the server body (2), the pedestal (71) of the needle body (61) is pushed up by the push-up cylinder (27) and protrudes into the holder (4). When doing so, the tip (63) and the cylindrical portion of the needle body (61) penetrate the resin sheet (91) of the bag (9) very easily. Accordingly, the water intake hole (65) passes through the resin sheet (91) and enters the inside of the bag (9), and the water (11) in the bag (9) flows into the water intake hole (as shown by an arrow F in FIG. After passing through 65), it passes through the inside of the push-up cylinder (27) and is sent to the tank (21).

  As described above, the user can attach the tip (63) and the cylindrical portion of the needle body (61) to the bag (9) with a very smooth feeling as compared with a conventional smooth surface needle that is not roughened. Since the needle body (61) stops in the middle of the resin sheet (91) and the surroundings are soiled with water (11), there is no failure.

The physical reason why the needle body (61) of the present invention can penetrate the resin sheet (91) of the bag (9) in such a smooth manner as compared with a conventional smooth surface needle is not necessarily clear. This is because the unevenness (64) forming the rough surface of the surface of the needle body (61) reduces the contact area between the needle body (61) and the resin sheet (91), thereby reducing the frictional resistance. I think that the.
The resin sheet (91) is a multi-layered sheet specially treated to prevent tearing, and the force for tightening the needle body (61) pierced with the resin sheet (91) is particularly large. The surface seems to have the effect of reducing the tightening of the resin sheet (91).

  As shown in Table 1, with respect to the needle (6) having the above-described configuration, as Example 1 of the present invention, the needle body (61) has a diameter of 10.5 mm, a height of 93 mm, and the tip (63) has a triangular pyramid shape. The outer surface including the side surface of the needle body (61) and the pointed slope is roughened with sandpaper No. 600 to obtain the irregularities (64).

  Further, as Example 2 of the present invention, the needle body (61) has a diameter of 8 mm, a height of 83 mm, a tip (63) having a quadrangular pyramid shape, and an outer surface including the side surface of the needle body (61) and the tip slope. The surface was roughened with No. 600 sandpaper to obtain irregularities (64).

  As a comparative example, the needle body (61) has a diameter of 10.5 mm, a height of 93 mm, and the tip (63) has a triangular pyramid shape as in Example 1, but the outer surface of the needle body (61) A smooth surface with no roughening was obtained.

Using the needle (6) of Example 1 and Example 2 of the present invention and the needle (6) of the comparative example, the piercing force and the passing force with respect to the resin sheet (91) constituting the bag (9) were measured.
As shown in FIG. 8, the piercing force and passing force are measured by placing the needle (6) upright and placing it on the upper pan scale (8), holding both ends of the resin sheet (91) with both hands, and moving downward. The needle (61) is pressed against the cusp (62) of the needle body (61), the load when the cusp (62) pierces the resin sheet (91) (the sharp piercing force), the tip (63) of the needle (6) The load when passing through the tip (passing force at the tip) and the load when the cylindrical part of the needle body (61) passes through the resin sheet (91) (passing force through the cylindrical part) ) Was observed and recorded. Since the load was measured 10 times and the average value was used as the measured value, the tendency of the piercing force and the passing force is reliable.

As shown in Table 1, the piercing force of the sharp point (62) against the resin sheet (91) was 400 g in Example 1 and Comparative Example, and 300 g in Example 2.
It is considered that the piercing force could be reduced by reducing the diameter of the needle (6).

The passing force of the tip (63) relative to the resin sheet (91) was 1300 g in the comparative example, 1000 g in Example 1, and 700 g in Example 2. Although the physical reason for the difference between the comparative example and Example 1 and Example 2 is not necessarily clear, the frictional resistance generated by the resin sheet (91) tightening the outer surface of the tip (63) of the needle body (61) Regarding the force, in Example 1 and Example 2, since the contact area with the resin sheet (91) is reduced due to innumerable fine irregularities (64), it is considered that the frictional resistance can be reduced. .
For this reason, in the comparative example, there is a considerably hard feeling at the time of piercing, but in Example 1 and Example 2, the tip (63) can be passed with a smooth feeling. Therefore, in the needle (6) of Example 1 and Example 2, the tip (63) easily penetrates the resin sheet (91).

The passing force through which the resin sheet (91) passes through the cylindrical portion of the needle body (61) was 1800 g in the comparative example, 1000 g in Example 1, and 400 g in Example 2. The difference between the comparative example and Example 1 and Example 2 is also not necessarily clear for physical reasons, but the frictional resistance generated by the resin sheet (91) tightening the outer surface of the cylindrical portion of the needle body (61). Regarding the force, in Example 1 and Example 2, since the contact area with the resin sheet (91) is reduced due to innumerable fine irregularities (64), it is considered that the frictional resistance can be reduced. .
For this reason, in the comparative example, there is a considerably hard feeling at the time of piercing, but in the first and second embodiments, the cylindrical portion of the needle body (61) can be passed with a smooth feeling. Therefore, the needle (6) of Example 1 and Example 2 is easy to penetrate deeply into the resin sheet (91).

  Further, comparing the first and second embodiments, the passing force of the cylindrical portion of the needle body (61) relative to the resin sheet (91) can be further reduced by reducing the diameter of the needle (6). Can do.

In addition, each part structure of this invention is not restricted to the said embodiment, A various deformation | transformation is possible within the technical scope as described in a claim.
For example, the rough surface processing for forming the irregularities (64) on the surface of the needle body (61) is not limited to sandpaper, but is a cutting process that rubs a processing member such as a metal blade, a metal file, or a metal brush, or a molding process. In this case, it can be carried out by embossing for patterning the molding surface, blasting for spraying powder, or acid corrosion processing.

The needle body (61) can also be made of glass.
In the case of glass, the surface of the needle body (61) can be roughened into ground glass with fluorine.

  INDUSTRIAL APPLICABILITY The present invention is useful as a needle that smoothly pierces a bag containing drinking water and causes the drinking water to flow out, and a bag-type drinking water server using the needle.

(1) Water server (bag-type liquid server)
(6) Needle
(61) Needle body
(62) Sharp
(63) Tip
(64) Concavity and convexity
(65) Water intake hole
(9) Bag
(91) Resin sheet

Claims (3)

In a needle for a bag-type liquid server having a cylindrical needle body with a leading end pointed and a water intake hole penetrating through the side,
The needle for a bag-type liquid server, wherein the outer surface of the needle body is roughened on the entire surface and has fine irregularities.   2. The bag type liquid according to claim 1, wherein the rough surface processing includes at least one of rubbing, cutting, embossing, blasting, acid corrosion processing, and fluorine processing of sandpaper of No. 320 to No. 600. 3. Server needle.   A bag type liquid server comprising the bag type liquid server needle according to claim 1.

Images