JP2003334483A - Gun type dispenser and container used for it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate drawing out of a piston after pouring out a whole amount while pouring out an approximately whole amount without leaving a content in a container. <P>SOLUTION: The gun type dispenser is provided with an approximately cylindrical container filling part 14 capable of embracing the container 2 comprising a flexible material which has a pouring out port 4 at one end and in which the content such as a viscous liquid substance, a paste-like substance or the like is filled in the inside; the piston 20 pushed into by a piston rod 19 until an internal volume is approximately lost when a bottom part 5 of the container 2 is pressed and fitted in a longitudinal direction of the container; and an operation part for pressing this piston 20 everytime by a predetermined pitch. The piston 20 is expandably/contractably formed in a radial direction. The diameter is enlarged when the bottom part 5 of the container 2 is pushed into and the diameter is contracted when it is pulled back to draw out it. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dispenser for pouring out the contents of a container filled with contents such as a viscous liquid substance or paste substance, particularly a gun type dispenser and the container used therefor. Regarding

[0002]

2. Description of the Related Art When adding mayonnaise, ketchup, various creams, mustard, other viscous liquids and pastes to foods, large amounts are sold in mass retailers of food for eating out such as hamburgers and hot dogs. Since it is necessary to process, the viscous liquid substance or paste substance is automatically dispensed from the container by an appropriate amount by a dispenser to improve efficiency at the time of sale.

As one of the above-mentioned dispensers, a conventional one shown in FIG.
There are those shown in (A) and (B). In this dispenser, a flexible and thin plastic container b filled with the content a is loaded into an outer cylinder c, and a bottom portion d of the container b is pressed by a piston e so that the container b There is a structure in which the contents a are pushed out from the spout g by pushing the bottom portion d side into the body portion f (for example, JP-A-2-1393).
77 publication).

[0004]

However, in the conventional dispenser having the above-mentioned structure, the body portion f of the container b is inserted while being folded so as to be doubled by the pushing motion of the piston e. When the piston e is pulled back after the object a has been poured out, the folded body part f becomes entangled with the piston e, making it difficult to pull out the piston e smoothly.
There is a problem in that workability and work efficiency are hindered because it is troublesome to carry out the processing after using the.

If the outer diameter of the piston e is reduced to such an extent that it can be easily withdrawn after use, when the bottom portion d of the container b is folded, the content a remains around the body portion f to be folded and the piston a. body part f on the back side of e
When the piston e is pulled out, the contents a enter between them, so that the contents a are enclosed in the body part f that is folded in two and the inner diameter of the body part f decreases, making it more difficult to pull out the piston e. In addition to the above problem, the content a remains at the time of discarding the container b after use, which causes another problem such as environmental pollution.

[0006] In view of this, the present invention has an object to make it possible to easily withdraw the piston after the total amount has been poured out while the almost total amount can be poured out without the contents remaining in the container. It is a thing.

[0007]

As a means for solving the above-mentioned problems, the invention according to claim 1 is a flexible structure having a spout at one end and filled with contents such as a viscous liquid substance and a paste-like substance inside. Container loading part having a substantially tubular shape capable of holding a container made of a flexible material, a piston pushed into the bottom part of the container until the inner volume thereof is almost eliminated when the container is press-fitted in the length direction of the container, and this piston And an operating part for pushing the piston rod by a predetermined pitch, and the piston is formed so as to be expandable and contractible in the diametrical direction, and is expanded when the bottom part of the container is pushed in and contracted when it is pulled back. It is characterized in that it was pulled out.

According to a second aspect of the present invention, the container loading section has a diameter such that the container can be inserted as tightly as possible, and the bottom of the inserted container can be pressed by the piston. It is characterized by having an enabled outer cylinder.

As a result, the container can be reliably pressed by the piston in a state where the container is supported by the outer cylinder arranged in the container loading section.

According to a third aspect of the present invention, the piston is constituted by a set of piston pieces which are divided into a plurality of pieces in the radial direction, and the piston pieces are slid in the radial direction by operating the piston rod to expand or contract the piston diameter. is there.

As a result, when the piston is pushed in, the entire area of the bottom of the container is pressed so that the piston is expanded to an outer diameter that allows it to be fitted into the body of the container as closely as possible, and the entire amount of the contents in the container is poured out. When finished, the outer diameter of the piston can be reduced and pulled out, which allows the contents to be poured out without remaining in the container, but the entire amount of the contents in the container has been poured out. The piston can be pulled out easily.

According to a fourth aspect of the present invention, there is provided a container for use in the gun-type dispenser, wherein the container has a cross-sectional shape similar to the inner surface shape of the end on the side where the spout is opened. Of the container, and a concave groove that is recessed inward of the body in the circumferential direction of the lower end of the body of the container.

Thus, when the bottom of the container is pressed by the piston, the peripheral edge of the groove on the lower end side of the body is first folded inward over the entire circumference, whereby the bottom of the container is folded unevenly. In addition, it is possible to fold it uniformly over the entire circumference without being folded into a non-circular shape, and to reliably push out the contents.

According to a fifth aspect of the present invention, there is provided a container in which at least one projection protruding outward is formed between the peripheral edge of the protruding bottom portion and the outer peripheral edge of the container bottom in the circumferential direction.

With this configuration, when the bottom portion of the container is pressed by the piston, the ridge portion formed on the bottom portion is uniformly folded because the rigidity is given by the presence of the ridge portion. The entire bottom portion is folded and pushed into the body portion without being partly biased, so that the contents in the container can be accurately poured out.

In any case, since the protruding bottom of the container bottom has a shape similar to the inner surface of the end where the opening of the container is present, the content in the container is pushed into a state in which it is in close contact with the inner surface. The whole amount can be poured out without leaving any residue.

The invention described in claims 6 to 9 specifies the structure of the piston.

That is, the piston according to a sixth aspect of the present invention is a plurality of pistons that are divided into a plurality of radial radial lines and that form a protruding bowl-shaped peripheral surface that can abut the outer surface of the bottom of the container as closely as possible. A piece, and a disk-shaped head member that can be fitted as closely as possible to the outer surface side of the projecting bottom portion that is formed on the bottom portion of the container and that projects in a cross-sectional shape similar to the spout-side inner surface,
A piston rod that moves intermittently forward by the operation of the operating portion, and a bearing portion fixed to the piston rod and a bearing portion provided on the back portion of each piston piece are rotatable by connecting levers. And each piston piece is slidably supported in the expansion / contraction direction on the head member, and when the piston rod is pushed, the connection levers rotate in the expansion direction so that the piston pieces move in the expansion direction. The piston diameter is enlarged by moving the piston.

The piston according to a seventh aspect of the present invention is a plurality of pistons which are divided into a plurality of pieces on a radial line and which form a bowl-shaped peripheral surface which can be brought into contact with the outer surface of the bottom of the container as closely as possible by assembly. A piece, a disk-shaped head member that can be fitted to the outer surface side of the protruding bottom portion that is formed on the bottom portion of the container and that projects in a cross-sectional shape similar to the inner surface of the spout side as closely as possible, and the operation of the operating portion And a piston member that moves intermittently forward by means of which a cam member having a cone-shaped peripheral surface whose tip side has a small diameter is fixed to the tip of the piston rod, and the piston members are slid on the head member in the expansion / contraction direction. Each piston piece is provided with a cam surface at its inner end on the center side, which comes into sliding contact with the peripheral surface of the cam member, and when the piston rod is pushed forward, the cam member slides the piston pieces in the radial direction. It is obtained as the piston diameter is enlarged by de.

In any of the above pistons, the piston is kept in the expanded state as long as the piston rod is being pushed (pouring operation), so that the entire bottom of the container is evenly distributed during the process of pouring the contents. The contents can be pushed out by being pressed and pushed in close contact with the inner peripheral surface of the body of the container.

Further, if the piston rod is pulled out in order to pull back the piston after all the amount has been poured out, the restriction to the expanded diameter state of the piston is released, so the copper portion of the folded container is not damaged and is light. Can be pulled out.

According to an eighth aspect of the present invention, there is provided a piston having a plurality of piston pieces each having an arcuate peripheral surface so as to form an annular shape as a set, and a cross-sectional shape formed on the bottom of the container and similar to the inner surface on the spout side. A disk-shaped head member that can be fitted as closely as possible to the outer surface side of the protruding bottom portion that protrudes into the piston, and a piston rod that moves forward intermittently by the operation of the operation portion, and the piston piece has each end portion. A cam member for moving each end of the piston piece in the expansion / contraction direction is fixed to the tip of the piston rod by loosely adhering each other, and the piston piece is slid in the expansion / contraction direction on the head member. The piston member is freely supported, and when the piston rod is rotated, the cam member is rotated to move each piston piece in the diameter expanding direction so that the piston diameter is expanded.

According to this, the piston diameter can be expanded / contracted only by rotating the piston rod.

According to a ninth aspect of the present invention, in a piston, a bearing member fixed to the tip of a piston rod that advances intermittently by the operation of the operating portion and a front side of the bearing member are arranged on a diameter line. It is configured to include a pair of semicircular piston pieces divided into two. The straight side portion of each piston piece is pivotally supported by the bearing member such that the piston piece is rotatable only forward of the bearing member, and both sides are supported when the container is pushed by the piston rod. The piston piece expands in a flat plate shape along the bearing member, and when the piston rod is pulled out, both piston pieces rotate forward of the bearing member due to friction with the container, The piston is designed to be reduced in diameter.

As a result, when the container is pushed by the piston rod, the bottom part of the container can be entirely pressed by the expanded diameter piston, while the diameter of the container is reduced when the piston rod is pulled out. The piston can be smoothly pulled out from the outer cylinder and / or the container.

In any of the above inventions, the piston piece can be provided with a spring for urging the piston piece in the direction of reducing the diameter, which makes it possible to surely reduce the diameter of the piston when the piston is pulled out. It can be pulled out reliably.

In the gun type dispenser according to the eleventh aspect of the present invention, the outer cylinder has a wall on the front end side thereof with which the container shoulder portion around the spout of the container can come into close contact when the container is inserted therein. The wall portion is formed with an opening through which the spout of the container inserted in the outer cylinder can protrude.

With this configuration, when the container inserted in the outer cylinder is pressed by the piston, the container can be surely pressed between the wall portion of the outer cylinder and the piston, and The contents filled in the container can be efficiently discharged from the spout.

According to a twelfth aspect of the present invention, in the gun type dispenser, when the container is inserted into the outer cylinder, the bottom end of the container projects from the outer cylinder by a predetermined length. It is characterized by having an axial length.

By doing so, the deformation of the bottom end of the container which may occur when the bottom of the container is pressed by the piston is not hindered by the outer cylinder, and the end of the container is responsive to the pressing of the piston. Therefore, the container can be deformed relatively freely, and the container can be pressed smoothly by the piston.

In the gun-type dispenser according to a thirteenth aspect, the inside of the wall portion of the outer cylinder and the portion of the piston which comes into contact with the bottom portion of the container inserted in the outer cylinder are in close contact with each other. It is characterized by having a shape.

By doing so, even when the container is arranged between the outer cylinder and the piston, it is possible to bring the outer cylinder and the piston into close contact with each other via the container. Substantially all of the contents filled in the container can be effectively discharged from the spout by pushing the piston.

[0033]

DETAILED DESCRIPTION OF THE INVENTION Each embodiment of the present invention will be described below with reference to the drawings.

First Embodiment FIGS. 1 to 13 are views showing a first embodiment of the present invention. FIG. 1 shows an external appearance of an example of a gun type dispenser 1 according to the first embodiment of the present invention, and FIG. 2 shows a main part of a container according to the first embodiment of the present invention as a cross section. .

The container 2 has a highly flexible structure formed by blow molding or the like with a resin material. A spout 4 is opened at one end of a cylindrical body 3 and a bottom 5 is formed at the other end. A sheet 6 in which a nozzle having a shape suitable for the purpose of pouring the contents is cut is attached to the pouring port 4 which is closed. The outer surface is sealed with a seal that is peeled off during use.

The bottom portion 5 of the container 2 has a protruding bottom portion 7 that protrudes inwardly in a shape similar to the inner surface shape of the end portion provided with the spout 4, and is required from the lower end of the body portion 3 of the container 2. A recessed groove 8 having a width of 5 mm and a single projecting strip 9 projecting outward are provided between the peripheral edge of the projecting bottom portion 7 and the outer peripheral edge of the container bottom portion 5. An annular recess 10 is formed between the hem portion and the outer peripheral edge of the container bottom 5. Therefore, when the container bottom 5 is pressed by the piston, the boundary portion 8a of the concave groove 8 with the container bottom 5 is folded inward first due to the existence of the concave groove 8, while the inside of the protrusion 9 is evenly inside. Will be folded towards you.

The basic structure of the gun type dispenser 1 is generally known, and the form shown here is a receiving member 11 having one half-divided shape obtained by dividing a cylinder into two in the axial direction.
The receiving member 11 is composed of the other half-split-shaped cover 13 pivotally supported by hinges 12, 12, ... on one side edge thereof, and when the cover 13 is closed, the container 2 is provided therein. The container is provided with a substantially cylindrical container loading section 14 capable of holding the fixed handle 1 at the base end of the receiving member 11.
5 is fixed, and the trigger lever 1 is attached to the fixed handle 15.
A base end portion of 6 is attached by a shaft 17 to form an operating portion, and a pouring port 4 of the container 2 is provided at the tip of the receiving member 11.
The ring member 18 that can be fitted so as to protrude is fixed.

When the piston rod 19 is inserted through the base end portion of the fixed handle 15 and the trigger lever 16 is grasped and rotated by a well-known ratchet mechanism (not shown) incorporated in the fixed handle 15. The piston rod 19 can be pulled back by intermittently advancing the piston rod 19 by a predetermined pitch and opening the ratchet. Reference numeral 19a is a handle for pulling back.

The container loading portion 14 is not necessarily limited to a structure in which a cylinder is divided into two parts, and is composed of a tubular member having a cylindrical inner peripheral surface from the beginning, and the ring member 18 at the tip is detachable and the tip is attached. The container 2 may be loaded and unloaded from the container, and the constituent material thereof may be any material having a shape-retaining property.

At the tip of the piston rod 19, there is provided a piston 20 for pressing the bottom portion 5 of the container 2 according to the present invention.

Next, a specific structural example of the piston 20 will be described.

FIGS. 3 to 6 show an embodiment of the piston according to claim 5, which is divided into a plurality of (4 in the figure) radial lines to form a bottom 5 of the container 2. The piston pieces 21, 21 ... Forming a protruding bowl-shaped peripheral surface capable of contacting the outer surface as closely as possible, and the recessed portion on the outer surface side of the protruding bottom portion 7 formed in the bottom portion 5 of the container 2 as close as possible. And a disk-shaped head member 22 that can be fitted to the. The outer peripheral portions of these piston pieces 21, 21, ...
a, the other side is a concave portion 21b, which is intertwined with each other,
The boundary with the adjacent piston piece 21 does not stand out when the diameter is expanded.

4 near the tip of the piston rod 19
.. are fixed by bosses 23a, and bearings 24, 24 ... Are fixedly provided near the outer periphery of the back of the piston pieces 21, 21 ,.
The bearing portion 23 of the piston rod 19 and the piston piece 21
Bearings 24 are rotatably connected by connecting levers 25, 25.

On the other hand, each of the piston pieces 21, 21, ... Has a long hole 26 which is long in the radial direction from the axial center side, and a shaft member 27 which is loosely inserted into the long hole 26 is the head member. 22 is fitted in a hole 28 formed in the hole 22 and fixed by a set screw 29, whereby the piston pieces 21, 21 ... With respect to the head member 22 are slid between the shaft member 27 and the long hole 26. The virtual circle formed on the outer circumference of 21, 21, ... Is slidable in the direction of expansion and contraction.

Therefore, by moving the piston rod 19 forward, the connecting levers 25, 25 are opened so that the umbrella frame is opened.
... rotate to expand the diameter of each of the piston pieces 21, 21, and the piston rod 19 is pulled back to connect the connecting lever 2
5, 25 ... Rotate in the closing direction to move the respective piston pieces 21, 2.
1 ... is reduced.

The outer peripheral portions of the piston pieces 21, 21 ... Are straight portions 21c, and the width T of the straight portions 21c is set to at least 6 mm so that good contact between the piston 20 and the body portion 3 of the container 2 is maintained. The contents in the container 2 can be more reliably poured out.

As shown in FIG. 6 in which the container 2 is shown in cross-section in the use state, when the piston 20 is pushed in, the diameter of the latter half of the container 2 is expanded when it is pushed into the body 3 as shown by the solid line in the figure. In this state, the bottom portion 5 of the container 12 can be pushed in close contact with the inner surface on the spout 4 side. At this time, the inner surface of the body portion 3 of the container 2 and the outer peripheral surface of the body portion 3 to be pushed in are pushed without a gap, and the contents hardly remain inside.

When the piston rod 19 is pulled back after pushing the piston 20 completely as shown in FIG.
25 ... rotate in the closing direction and the virtual circle formed on the outer circumference of the piston pieces 21, 21 ... shrinks, and the outer circumference of the body part 3 of the container 2 is folded as shown by the chain line in FIG. Separated from the inner surface, it can be pulled out without any resistance.

FIGS. 7 to 9 show an embodiment of the piston according to claim 6, and like the above embodiment, the container is divided into a plurality of (4 in the figure) radial lines, and the container The piston pieces 31, 31 ... Forming a protruding bowl-shaped peripheral surface capable of contacting the outer surface of the bottom 5 of the container 2 and the outer surface of the protruding bottom 7 of the bottom 5 of the container 2 are fitted as closely as possible. It has a disc-shaped head member 32 that can be fitted, and is similar in appearance to the above-described embodiment.

A cam member 30 having a cone-shaped cam surface 30a having a small diameter on the tip side is provided at the tip of the piston rod 19.
Is fixed.

A long hole 33 which is long in the radial direction is bored from the axial center side of each of the piston pieces 31, 31, ..., A shaft member 34 which is loosely inserted into the long hole 33 is fixed to the piston rod 19. 36 of the boss portion 35 and the head member 3
2 and the hole 37 formed in
Are fixed relative to the head member 32 by the sliding movement of the shaft member 34 and the elongated holes 33 with respect to the head member 32, whereby the virtual circle formed on the outer periphery of each piston piece 31, 31, ... It is slidable on. The side of the piston pieces 31, 31 ... Which faces the cam member 30 on the axial center side is a concave arcuate tapered surface 39, and the tapered surfaces 39, 39 ... A cone-shaped concave portion that is aligned with the cone-shaped cam surface 30a of the cam member 30 is configured, and by pushing in the cam member 30, each piston piece 31, 31, ...
The tapered surface 39 is pushed and slid in the radial direction, so that the piston diameter is enlarged.

Also in the case of this embodiment, as in the case of the above-described embodiment, the outer peripheral portion of each piston piece 31, 31, ... Has a projection piece 31a on one side and a concave portion 31b on the other side so that they can be interdigitated with each other. And each piston piece 31, 31
The outer peripheral portion of ... Is a straight portion 31c having a width T.

In order to surely reduce the diameter of the piston pieces 31, 31 ... When the piston 20 is retracted, as shown in FIG.
Is formed, and the ring-shaped coil spring 40 is internally tensioned and installed over the spring accommodating portions 31d, 31d ...
31 are automatically slid in the contraction direction.

Therefore, in this embodiment, when the piston rod 19 is advanced, the cam member 30 at the tip thereof is moved.
Are pushed in while pushing the tapered cam surfaces 39, 39 at the center of the piston pieces 31, 31 ... And the cam surface 30a of the cam member 30 resists each piston piece 31, 31 ,. Spread and spread each piston piece 31, 31 ...
An imaginary circle formed by the outer peripheral edge of the container expands to press the entire area of the container bottom 5, and the rear half of the body 3 of the container 2 is connected to the body 3 of the front half.
It can be folded and pushed in.

When the piston rod 19 is slightly pulled back after the total amount of the contents has been poured out, the cam member 30 causes the piston pieces 31, 31 to move.
The piston pieces 31, 31 ... Are reduced in diameter by the urging force of the spring 40 in the diameter reducing direction as they come out of the central cam surfaces 39, 39 of. Can be pulled out.

FIGS. 10 to 13 show an embodiment of the piston according to the present invention. A plurality of (four in the figure) piston pieces 41 having an arcuate peripheral surface 41a so as to form an annular shape by being assembled. , 41, a disk-shaped head member 42 that can be fitted as closely as possible to the outer surface side of the protruding bottom portion 7 formed on the bottom portion 5 of the container 2, and the trigger lever 16 of the operating portion.
The piston rod 19 can be intermittently moved forward and rotated arbitrarily by the operation of.

The piston pieces 41, 41 ... Have a long hole 43 at one end, and the shafts 45, 45 ... Which connect the head member 42 and the ring member 44 are loosely inserted so that the piston pieces 41, 41. 41 ... are connected so as to be expandable and contractible. Also in this case, the width T of the outer circumference of the piston piece 41 is a linear shape of about 6 mm.

A cam member 46 is fixed to the tip of the piston rod 19. The cam member 46 is located inside the piston pieces 41, 41 ... And has a cam surface on the circumferential surface against which the ends of the piston pieces 41, 41.

As shown in FIG. 12, on this cam surface, four sets of high places 46a, low places 46b and stoppers 46c are formed corresponding to the respective piston pieces 41, 41 ...
2, when the cam member 46 is rotated in the direction of the arrow, the piston piece 41 shifts from the position shown by the solid line to the state shown by the chain line, and the end of the piston piece 41 hits the stopper 46c while being pushed by the high place 46a and stops. The piston pieces 41, 41, ... Are expanded by sliding the elongated hole 43 and the shaft 45, and the diameter is reduced by rotating the cam member in the direction opposite to the arrow.

In the figure, 47 and 48 are the ring members 4
4, by rotating the cam member 46 directly, the piston pieces 41, 4
1 shows a knob for expanding and contracting. Further, in order to reliably reduce the diameter of the piston pieces 41, 41 ... When the diameter of the piston pieces 41, 41 ... Is reduced by the rotation of the cam member 46, a spring may be attached to each piston piece 41, 41. .

Second Embodiment FIG. 14 shows the appearance of an example of a gun type dispenser 1 according to the second embodiment of the present invention. FIG. 15 schematically shows the configuration of an example of the piston according to the present embodiment. FIG. 16 is a diagram for explaining the outline of the process of pressing the container inserted in the outer cylinder with the piston and the outline of the process of pulling out the piston from the outer cylinder and the container. In this embodiment, the same parts as those in the first embodiment described above are designated by the same reference numerals, and detailed description thereof will be omitted.

The container loading section 14 in this embodiment is
As shown in FIG. 14, it has an outer cylinder 50 having an inner diameter into which the container 2 can be inserted as closely as possible. The outer cylinder 50 is removably provided in the container loading unit 14, and the outer cylinder 50 can be loaded at a position where the bottom of the inserted container 2 can be pressed by the piston 20. It has become.

The outer cylinder 50 has a wall portion 52 on the front end side thereof, that is, on the front side in the pressing direction of the container 2 by the piston 20, the wall portion 52 is provided when the container 2 is inserted into the outer cylinder 50. It can be brought into close contact with the container shoulder portion 2a around the spout 4 of the container 2. The wall portion 52 has an opening 53
Is formed so that the spout 4 of the container 2 inserted in the outer cylinder 50 can project from the opening 53. On the other hand, the rear end side of the outer cylinder 50 is in an open state, and the container 2 is inserted from the rear end side of the outer cylinder 50 to the inside.
Can be inserted.

The outer cylinder 50 has an axial length such that when the container 2 is inserted into the outer cylinder 50, the bottom end of the container 2 protrudes from the outer cylinder 50 by a predetermined length. That is, it has a length in the axial direction (see FIG. 16A).

On the other hand, the piston 20 provided at the tip of the piston rod 19 has a bearing member 5 fixed to the tip of the piston rod 19, as shown in FIGS.
4 and a pair of piston pieces 5 arranged on the front side of the bearing member 54, that is, on the front side in the pressing direction of the container 2 by the piston 20.
1 and a piston piece support portion 55 that is disposed between the piston pieces 51 on the front side of the bearing member 54 and pivotally supports each piston piece 51.

Each of the pair of piston pieces 51 has a semicircular shape in which a disk-shaped member is divided into two parts on a diameter line, and both piston pieces 51 are arranged so as to form a disk shape. (See FIG. 15B). Further, each piston piece 51 is pivotally supported at a position where the straight side portion 51a is close to the bearing member 54 in the piston piece support portion 55, and only on the front side of the bearing member 54 with the pivot point 51b as the center. It is configured to be rotatable. In this manner, by pivotally supporting each piston piece 51 at a position close to the bearing member 54, each piston piece 51 is moved toward the front side of the bearing member 54.
It is possible to effectively suppress the bulging in the radial direction of each piston piece 51 that occurs when rotating the. That is, when each piston piece 51 is rotated about a position away from the bearing member 54, if the piston piece 51 deployed along the bearing member 54 is rotated forward, the radius of the piston piece 51 is increased. The bulge in the direction increases. On the other hand, when each piston piece 51 is rotated around the position close to the bearing member 54, the bulge in the radial direction of the piston piece is reduced. Therefore, from the viewpoint of suppressing the bulging in the radial direction of each piston piece 51 that occurs during rotation, it is preferable to provide the pivot point of each piston piece 51 at a position as close as possible to the bearing member 54.

The piston piece support portion 55 is formed with a rotation limiting portion 56 for limiting the rotation of each piston piece 51 in the front direction. In the present embodiment, the inclined portion provided so as to correspond to each piston piece 51 in the intermediate portion functions as the rotation limiting portion 56 (see FIG. 15 (A)). Therefore, the rotation range of each piston piece 51 is defined by the bearing member 54 and the rotation limiting portion 56 (inclined portion) of the piston piece support portion 55, and each piston piece 51 is flat along the bearing member 54. The diameter of the piston 20 is expanded by expanding the piston 20 (see the solid line in FIG. 15A), and the piston 20 is contracted by rotating each piston piece 51 in front of the bearing member 54. (See the chain double-dashed line portion in FIG. 15A).

When each piston piece 51 is in the state of being expanded in a disk shape (flat plate shape) along the bearing member 54, the size of the cross section of the piston 20 in the disk diameter direction is the outer cylinder 50.
It corresponds to the size of the cross section of the disk diameter direction. Therefore, when the piston 20 is pushed while pressing the bottom portion of the container 2 by the piston 20 so as to double-fold the body portion 2b of the container 2, between the pushing piston 20 and the outer cylinder 50. Is the body 2b of the container 2 folded in double
Only the contents are filled, so that the contents filled in the container 2 do not exist (FIG. 16 (B)).
(See (C)).

The inside of the wall portion 52 of the outer cylinder 50,
The portion of the piston 20 that comes into contact with the bottom of the container 2 inserted in the outer cylinder 50 has a shape corresponding to each other, and it is possible to bring them into close contact with each other without providing a gap. (See FIG. 16C).

The other structure is substantially the same as that of the first embodiment shown in FIGS.

14 to 16, the process of loading the container 2 filled with the contents into the gun type dispenser 1 of the present embodiment, the process of loading the container 2 loaded into the gun type dispenser 1 will be described. Each of the process of discharging the content from the spout 4 and the process of removing the container 2 from the gun type dispenser 1 will be described.

First, as shown in FIG. 14, the container 2 filled with a content such as a viscous liquid is inserted into the outer cylinder 50, and the spout 4 of the container 2 is provided on the front end side of the outer cylinder 50. Wall 5
The second opening 53 is projected. At this time, the container 2 is inserted into the outer cylinder 50 so that the container shoulder 2a around the spout 4 of the container 2 and the inside of the wall 52 of the outer cylinder 50 are in close contact with each other. Therefore, the container 2 is accurately supported by the outer cylinder 50, and the spout 4 of the container 2 is maintained in an open state.

Then, the outer cylinder 50 in which the container 2 is inserted is loaded into the container loading portion 14, and the outside of the wall portion 52 and the ring member 18 provided at the tip of the container loading portion 14 are brought into close contact with each other, Alternatively, the two are placed close to each other. As a result, the container 2 is loaded into the gun-type dispenser 1, and the preparation for discharging the content from the spout 4 of the container 2 is ready.

Then, by grasping and rotating the trigger lever 16, the piston rod 19 is intermittently advanced forward by a predetermined pitch, and the piston 20 provided at the tip of the piston rod 19 and the gun type dispenser 1 are loaded. The bottom of the container 2 that is being made into contact (FIG. 16 (A)).
reference). At this time, each of the pair of piston pieces 51 forming the piston 20 is pressed by the bottom portion of the container 2 and expands into a flat plate shape along the bearing member 54, and the piston 20 is expanded in diameter to form a bottom portion of the container 2. Will come into contact with.

Then, by further rotating the trigger lever 16 and moving the piston rod 19 forward, the piston 20 in contact with the bottom of the container 2 made of a flexible material further presses the container 2. It is pushed into the outer cylinder 50 (see FIG. 15 (b)). As the piston 20 is pushed, the contents filled in the container 2 are discharged from the spout 4 of the container 2, so that the rotation of the trigger lever 16 is adjusted to adjust the pushing movement of the piston 20. As a result, it is possible to appropriately adjust the discharge amount of the content discharged from the spout 4. Therefore, the contents filled in the container 2 can be discharged from the spout 4 in an appropriate amount and added to food such as hamburger.

By the way, when the bottom of the container 2 is pressed by the pushing piston 20, the container 2 is prevented from being crushed forward without being double-folded, and the container 2 is surely double-folded. It is preferable to go (see FIG. 16). In general, when the piston 20 presses only the central portion of the bottom of the container 2, it is possible to relatively easily double-fold the container 2. In contrast,
Like the piston 20 of the present embodiment, when the piston 20 (in a diameter-expanded state) presses substantially the entire bottom portion of the container 2, the container 2 is crushed forward without being double folded. There is a tendency for this to occur, and such a tendency is particularly remarkable at the bottom end of the container 2. However, in the present embodiment, the container 2 is inserted into the outer cylinder 50 with the bottom end thereof protruding (see FIG. 16).
(See (A)), the deformation of the bottom end of the container 2 that occurs when the bottom of the container 2 is pressed by the piston 20 is not directly hindered by the outer cylinder 50. Thus, the bottom end of the container 2 is relatively freely deformed without being restricted by the outer cylinder 50, and when the bottom of the container 2 is pressed by the piston 20, the bottom end of the container 2 is diametrically oriented on the bottom surface. Deforms to spread. Therefore, piston 2
When the bottom of the container 2 is pressed by 0, the bottom of the container 2 is deformed along the pressing surface of the piston 20, and the piston 20 is in a state of pressing the central portion of the bottom of the container 2. Therefore, in the present embodiment, when the piston 20 is smoothly pushed (advanced), the container 2 can be relatively double-folded. The axial length of such an outer cylinder 50 can be appropriately determined in consideration of various factors. For example, the folded state of the container 2 due to the pushing movement of the piston 20, the load applied to the piston 20, the container, and the like. 2 support state, or piston 20 and outer cylinder 50
It is also possible to determine the axial length in consideration of various factors such as the ironing condition of the container 2 between and.

On the other hand, the expanded piston 20 for pressing the container 2 has a disk-shaped diametrical cross section corresponding to the size of the diametrical cross section of the outer cylinder 50. When the body 20 of the container 2 is pushed, the body 2b of the container 2 is gradually folded in a double manner so as to be squeezed between the piston 20 and the outer cylinder 50. As a result, it is possible to effectively prevent the contents from remaining in the double-folded container 2.

Then, by further rotating the trigger lever 16 and further moving the piston rod 19, the wall portion 52 of the outer cylinder 50 and the piston 20 are finally double-folded. Contact is made only through 2, and almost the entire content in the container 2 is discharged from the spout 4. At this time, the inside of the wall portion 52 of the outer cylinder 50 and the piston 20
The part of the container 2 that is inserted into the outer cylinder 50 and comes into contact with the bottom of the container 2 has a shape that allows mutual contact through the container 2 made of a flexible material. Therefore, the piston 20
It is possible to effectively prevent the contents from remaining in the container 2 that is doubly folded between the container and the wall portion 52 of the outer cylinder 50.

The piston 20 can be pulled out from the outer cylinder 50 and / or the container 2 by opening the ratchet and pulling back the piston rod 19 with the pullback handle 19a. At this time, friction is generated between the outer peripheral portion of each piston piece 51 forming the piston 20 and the double folded container 2 that is in contact with the outer peripheral portion of each piston piece 51. Become. Due to this friction, each piston piece 51 rotates forward of the bearing member 54 around the pivot point 51b, and the diameter of the piston 20 is reduced (see the chain double-dashed line portion in FIG. 16C). As a result, the piston 20 having a reduced diameter and the outer cylinder 5 that contacts the piston 20
0 and / or the contact force (force acting perpendicular to the contact surface) between the piston 20 and the container 2 is reduced, or the contact between them is released, so that the piston 20 from the outer cylinder 50 and / or the container 2 is released.
It is possible to reduce the pulling force required when pulling out.

After the piston 20 is pulled out, the outer cylinder 50 and the container 2 are removed from the container loading section 14, and the container 2 is removed from the outer cylinder 50, so that the used container 2 is replaced with the gun type dispenser. Can be removed from 1.

The gun type dispenser 1 of the present embodiment is not limited to the above. For example, the outer cylinder 5 having the cover 13 included in the gun-type dispenser 1 according to the first embodiment and the container 2 inserted therein is provided.
It is also possible to support 0 by the cover 13.

Further, the piston 20 of this embodiment is not limited to the piston of the type clearly shown in FIG. For example, a piston of the type clearly shown in FIGS. 3 to 13 or a piston similar thereto can be used as the piston 20 of the present embodiment.

The present invention is not limited to the above-described embodiments, and design changes and the like can be added without departing from the spirit of the present invention, and such modifications are also covered by the present invention. included.

[0084]

As described above, according to the first to third aspects of the present invention, when the piston is pushed in, the piston can be pressed into the body of the container as closely as possible by pressing the entire area of the bottom of the container. Since the piston can be pulled out by reducing the outer diameter of the piston after expanding all the contents in the container to the outer diameter, the contents can be poured out without remaining in the container. At the same time, the piston can be easily pulled out after the entire amount has been poured.

As a result, since the contents do not remain when the used container is discarded, there is no environmental problem at the time of waste disposal.

According to the second aspect of the invention, since the container is inserted and supported by the outer cylinder that can be loaded at a predetermined position, the supporting state of the container can be adjusted by the outer cylinder. Therefore, in the present invention, it is possible to flexibly deal with various types of containers and gun type dispensers by appropriately changing the shape of the outer cylinder and the like. As described above, the application range of the present invention is wide, and the present invention can be effectively applied to a general-purpose gun type dispenser which has been used conventionally.

According to the fourth aspect of the present invention, when the bottom portion of the container is pressed by the piston, the peripheral edge of the concave groove circumferentially provided on the lower end of the body on the lower end side of the body is folded first over the entire circumference. Therefore, the bottom of the container will not be folded unevenly or will not be folded into a non-circular shape, and it will be folded evenly over the entire circumference to ensure that the lower half of the body is pushed into the upper half of the body. It is possible to dispense goods.

Further, as in claim 5, if at least one projection protruding outward is provided between the peripheral edge of the protruding bottom portion of the container bottom and the outer peripheral edge of the container bottom portion, the container bottom portion is pressed by the piston. When this is done, the ridge portion is more evenly folded due to the rigidity provided by the ridge, so that the contents in the container can be poured out more reliably.

In any of the pistons according to claims 6 and 7, as long as the piston rod is pushed to perform the pouring operation, the piston is in the expanded state, so that the container is in the process of pouring the contents. The entire area of the bottom can be pressed evenly to fit snugly into the lower half of the body of the container, which allows the entire contents of the container to be pushed out.

If the piston rod is actuated in the pull-out direction after all the amount has been poured out, the piston can be reduced in diameter and lightly pulled out without resistance, the operation at the time of container replacement can be performed easily and quickly, and work at mass retailers, etc. The efficiency can be significantly improved.

The piston described in claim 8 can exhibit the same function as that of the piston described in claims 5 and 6 only by slightly rotating the piston rod when the piston rod is pulled out.

According to the ninth aspect of the invention, the rotation of each piston piece is adjusted by the friction between the piston and the container, and the expansion and contraction of the piston can be adjusted.

In any of the above-mentioned inventions, if the piston piece is provided with a spring for urging it in the diameter reducing direction, the diameter of the piston can be reliably reduced when the piston is pulled out, so that the piston can be pulled out more easily. it can.

According to the gun type dispenser of the eleventh aspect, since the container is accurately supported by the outer cylinder and the opening state of the spout of the container can be surely held, the container is inserted into the outer cylinder. When the container is pressed by the piston, the container can be reliably pressed between the wall of the outer cylinder and the piston, and the contents filled in the container can be efficiently discharged from the spout. It can be discharged.

According to the gun type dispenser of the twelfth aspect, when the bottom of the container is pressed by the piston, the end of the container on the bottom side can be relatively freely deformed, and the piston causes the outer cylinder to move. It is possible to smoothly press the inserted container with a relatively weak force.

According to the gun type dispenser of the thirteenth aspect, even when the container is arranged between the outer cylinder and the piston, the outer cylinder and the piston are inserted through the container made of the flexible material. Since they can be in close contact with each other, substantially all of the contents filled in the container can be effectively discharged from the spout by pushing the piston.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of a gun type dispenser according to the present invention.

FIG. 2 is a side view with an essential part in cross section showing an embodiment of a gun-type dispenser container according to the present invention.

FIG. 3 is a perspective view showing an embodiment of a piston according to the present invention.

FIG. 4 is an exploded perspective view of the same as seen from the opposite side of FIG. 3.

FIG. 5 is a sectional view of the same.

6 is a cross-sectional view showing a state in which the contents in the container have been poured out using the piston of FIG. 3 in a solid line and a chain line in the drawing.

FIG. 7 is an exploded perspective view showing another embodiment of the piston according to the present invention.

FIG. 8 is a sectional view of the same.

FIG. 9 is an exploded perspective view of the same as seen from the opposite side of FIG. 7.

FIG. 10 is an exploded perspective view showing still another embodiment of the piston according to the present invention.

FIG. 11 is a perspective view showing two piston pieces taken out in FIG.

FIG. 12 is an explanatory view showing a relationship between the piston piece and a cam member.

FIG. 13 is a perspective view showing a state after assembly of the same.

FIG. 14 is a perspective view showing a second embodiment of a gun type dispenser according to the present invention.

FIG. 15 is a schematic diagram showing the configuration of an example of a piston according to the second embodiment. (A) is a cross-sectional view as seen from the side, in which the expanded diameter of the piston is shown by the solid line, and the reduced diameter is shown by the chain double-dashed line. (B) shows a front view.

FIG. 16 is an explanatory view showing a process of pressing a container inserted in the outer cylinder with a piston and a process of withdrawing the piston from the outer cylinder and the container.

17 (A) and 17 (B) are sectional views for explaining a conventional technique.

[Explanation of symbols]

1 Gun dispenser 2 containers 3 torso 4 outlet 5 Container bottom 7 protruding bottom 8 groove 9 ridges 10 recess 11 Receiving member 13 cover 14 Container loading section 15 fixed handle 16 Trigger lever 19 piston rod 20 pistons 21, 31, 41, 51 Piston pieces 22, 32, 42 Head member 25 Connection lever 30,46 Cam member 50 outer cylinder 52 wall 53 openings 54 Bearing member 55 Piston piece support 56 Rotation limiter

Continued front page    F-term (reference) 3E014 KA06 KA09                 3E065 BA11 DD03 DD10 FA20 GA02                       GA10 HA03 JA23                 4B014 GE10 GP06 GQ03 GQ10                 4F041 AA01 AA16 AB01 BA02 BA12                       CB05 CB44 CB55

Claims (13)

[Claims] 1. A container loading section having a substantially cylindrical shape having a spout at one end and capable of holding a container made of a flexible material filled with contents such as a viscous liquid material and a paste material inside. And a piston that is pushed in by the piston rod until the inner volume of the bottom portion of the container is pressed into the length direction of the container until the inner volume is almost exhausted, and an operation unit that pushes the piston rod equipped with the piston at a predetermined pitch. The piston is formed so as to be expandable and contractible in its diameter direction, the diameter is expanded when the bottom of the container is pushed in, and the diameter is reduced when the container is pulled back to be withdrawn. 2. The container loading section has an inner diameter that allows the container to be inserted as tightly as possible and can be loaded in a position where the bottom of the inserted container can be pressed by the piston. The gun dispenser according to claim 1, further comprising an outer cylinder. 3. A container loading part having a substantially cylindrical shape having a spout at one end and capable of holding a container made of a flexible material filled with contents such as a viscous liquid substance and a paste substance inside. And a piston that is pushed in by the piston rod until the inner volume of the bottom portion of the container is pressed into the length direction of the container until the inner volume is almost exhausted, and an operation unit that pushes the piston rod equipped with the piston at a predetermined pitch. The piston is composed of a set of a plurality of piston pieces divided on a radial line, and the piston rod is slid in the radial direction by the operation of the piston rod so that the outer diameter of the piston is expanded or reduced. Gun-type dispenser characterized by 4. A container loading unit having a substantially cylindrical shape having a spout at one end and capable of holding a container made of a flexible material filled with contents such as a viscous liquid material and a paste material inside. And a piston that is pushed in by the piston rod until the inner volume of the bottom portion of the container is pressed into the length direction of the container until the inner volume is almost exhausted, and an operation unit that pushes the piston rod equipped with the piston at a predetermined pitch. However, the piston is a container used for a gun-type dispenser, which is formed to be expandable and contractible in the diameter direction thereof, the diameter of which is expanded when the bottom portion of the container is pushed in, and the diameter of which is reduced when the container is pulled back. The container has a projecting bottom portion having a cross-sectional shape similar to the inner surface shape of the end portion on the side where the spout is opened at the bottom portion and projecting inward of the container, and an inner portion of the body portion in the lower end circumferential direction of the body portion. Towards Cancer dispenser container characterized by having a concave groove recessed Te. 5. The container for a gun type dispenser according to claim 4, wherein at least one protrusion protruding outward is formed in the circumferential direction between the peripheral edge of the protruding bottom portion and the outer peripheral edge of the container bottom portion. 6. A plurality of piston pieces, each of which is divided into a plurality of pieces on a radial line, and which forms a protruding bowl-like peripheral surface capable of contacting the outer surface of the bottom of the container as closely as possible by a set; A disk-shaped head member that can be fitted to the outer surface side of the protruding bottom portion that is formed on the bottom portion and has a similar cross-sectional shape to the inner surface on the spout side side and that can be moved forward intermittently by the operation of the operation portion. And a bearing portion fixed to the piston rod and a bearing portion provided on the back of each piston piece are rotatably connected by connecting levers, and the head member is connected to each piston. When the piston rod is pushed, the connecting levers rotate in the expansion direction and the piston pieces move in the expansion direction so that the piston diameter is expanded. Done Either one of claims 1 to 3 of 1
The gun-type dispenser according to the item. 7. A plurality of piston pieces, each of which is divided into a plurality of pieces on a radial line, and which forms a protruding bowl-like peripheral surface capable of contacting the outer surface of the bottom portion of the container as closely as possible by assembly, and A disk-shaped head member that can be fitted to the outer surface side of the protruding bottom portion that is formed on the bottom portion and has a similar cross-sectional shape to the inner surface on the spout side side and that can be moved forward intermittently by the operation of the operation portion. And a piston member for fixing the cam member having a cone-shaped peripheral surface having a small diameter on the tip side of the piston rod, and at the same time, the head member slidably supporting each piston piece in the expansion / contraction direction, A tapered cam surface that slidably contacts the peripheral surface of the cam member is provided at the center inner end of each piston piece, and when the piston rod is pushed forward, the cam member slides the piston piece in the radial direction to fix the piston. Cancer dispenser according to any one of claims 1 to 3 diameters are adapted to be expanded. 8. The piston includes a plurality of piston pieces each having an arcuate peripheral surface so as to have an annular shape when assembled, and a protruding bottom portion formed on the bottom portion of the container and protruding in a cross-sectional shape similar to the inner surface of the spout side. A disk-shaped head member that can be fitted as closely as possible to the outer surface side of the piston, and a piston rod that moves forward intermittently by the operation of the operating portion. Formed in an annular shape, a cam member for moving each end of the piston piece in the expansion / contraction direction is fixedly provided at the tip of the piston rod, and the head member slidably supports the piston piece in the expansion / contraction direction, 4. The piston diameter is expanded by rotating the cam member when the piston rod is rotated and moving each piston piece in the diameter expansion direction. Moth Formula dispenser. 9. The piston includes a bearing member fixed to a tip of a piston rod that advances intermittently by the operation of the operation portion, and a half member arranged on the front side of the bearing member and divided into two on a diameter line. A pair of circular piston pieces are included, and a straight side portion of each piston piece is pivotally supported by the bearing member so that each piston piece can rotate only forward of the bearing member. When the container is pushed by the piston rod, both piston pieces expand in a flat plate shape along the bearing member to expand the diameter of the piston, and when the piston rod is pulled out, the piston is expanded by friction with the container. The gun type dispenser according to any one of claims 1 to 3, wherein the piston piece is rotated forward of the bearing member to reduce the diameter of the piston. 10. The gun-type dispenser according to claim 6, wherein the piston piece is provided with a spring for urging the piston piece in a diameter reducing direction. 11. The outer cylinder has a wall portion on the front end side thereof, with which a container shoulder portion around the spout of the container can come into close contact when the container is inserted therein. The gun-type dispenser according to claim 2, wherein an opening is formed in the portion so that a spout of the container inserted in the outer cylinder can protrude. 12. The outer cylinder has an axial length such that an end portion on the bottom side of the container projects a predetermined length from the outer cylinder when the container is inserted therein. The gun-type dispenser according to claim 11, which is characterized in that. 13. The inside of the wall portion of the outer cylinder and the portion of the piston that comes into contact with the bottom portion of the container inserted in the outer cylinder have shapes that are in close contact with each other. The gas type dispenser according to any one of claims 11 and 12.