JP6828232B2 - Extrusion mechanism - Google Patents

Description

The present invention relates to an extrusion mechanism for extruding a fluid from a container containing a fluid such as a sealant.

Conventionally, an extrusion gun is known as a tool for extruding a fluid from a container containing a fluid such as a sealant. Typical fluids for which an extrusion gun is used are sealants and adhesives.

As such an extrusion gun, a cylinder portion for storing the container containing the fluid in a columnar internal space and a pressing member for pressing the container to push the fluid contained in the container to the outside are provided. Some are provided (see, for example, Patent Document 1).

In recent years, sausage-type containers made of flexible films have been developed as containers. Since the sausage type container is formed from a film, it has an advantage that the weight and volume of waste after use are small.

JP-A-2007-237028

However, since the sausage-type container is flexible, it is difficult to properly press the sausage-type container. Therefore, it is difficult to properly push the fluid contained in the sausage-type container to the outside of the cylinder portion. This problem may occur not only in sausage-type containers but also in other containers (hard containers).

The present invention has been made in view of the above problems, and an object of the present invention is to provide an extrusion mechanism capable of appropriately extruding a fluid contained in a container.

(1) The present invention is a cylinder portion having a columnar internal space, and a cylinder portion in which a container containing a fluid is stored in the internal space and a fluid contained in the container are externally arranged. A pressing member that moves in the longitudinal direction of the cylinder portion and presses the container housed in the internal space of the cylinder portion is provided, and the pressing member is directed inward from the outer peripheral edge thereof. It is an extrusion mechanism having a plurality of slits extending and penetrating in the longitudinal direction of the cylinder portion.

(2) The region including the outer peripheral edge of the pressing member may be bent toward the container to form an outer peripheral bent region.

(3) A retreat prevention member arranged on the opposite side of the container to the pressing member is further provided, and the retreat prevention member has a shape corresponding to a region inside the outer peripheral bending region of the pressing member. Then, the inner region of the pressing member that deforms so as to retract toward the retracting prevention member may be received.

(4) There may be substantially no gap between the outer peripheral edge of the pressing member and the inner surface of the internal space.

According to the present invention, it is possible to provide an extrusion mechanism capable of appropriately extruding a fluid contained in a container.

It is a perspective view which shows the extrusion gun as one Embodiment of the extrusion mechanism which concerns on this invention. It is a perspective view which shows the inside by partially breaking the extrusion gun shown in FIG. It is a vertical cross-sectional view which cut the extrusion gun in the diameter direction. It is a partially enlarged view of FIG. It is a perspective view which looked at the sausage type container from the side to be pressed. It is a figure which shows the pressing member, (A) is a perspective view seen from the pressing surface side, (B) is a plan view seen from the pressing surface side, (C) is a perspective view seen from the opposite side of the pressing surface. .. It is a perspective view which shows the retreat prevention member.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an extrusion gun as an embodiment of an extrusion mechanism according to the present invention. FIG. 2 is a perspective view showing the inside of the extrusion gun shown in FIG. 1 by partially breaking the gun. FIG. 3 is a vertical cross-sectional view of the extrusion gun cut in the radial direction. FIG. 4 is a partially enlarged view of FIG. FIG. 5 is a perspective view of the sausage-shaped container as viewed from the pressed side. 6A and 6B are views showing a pressing member, FIG. 6A is a perspective view seen from the pressing surface side, FIG. 6B is a plan view seen from the pressing surface side, and FIG. 6C is a view from the opposite side of the pressing surface. It is a perspective view. FIG. 7 is a perspective view showing a retract prevention member.

As shown in FIGS. 1 to 4, the extrusion gun 1 as an embodiment of the extrusion mechanism of the present invention is a device for extruding a fluid from a container 6 containing the fluid. The extrusion gun 1 of the present embodiment mainly includes a cylinder portion 2, a pressing member 3, a retreat prevention member 41, an extrusion rod 42, a grip portion 52, and a lever 54.

The cylinder portion 2 includes a cylinder main body 21, a front end side lid portion 23, and a rear end side lid portion 24, and has a columnar internal space 22 extending in the longitudinal direction. The cylinder body 21 has openings at both ends. The cylinder portion 2 stores the container 6 containing the fluid in the internal space 22. A tip-side lid 23 is screwed into the tip-side opening of the cylinder body 21. A through hole 23a through which the nozzle portion 62 (described later) of the container 6 penetrates is provided at the center of the tip side lid portion 23. A rear end side lid 24 is screwed into the opening on the rear end side of the cylinder body 21. A through hole through which the extrusion rod 42 and the like penetrate is provided in the center of the rear end side lid portion 24.

The container 6 is housed in the internal space 22 of the cylinder portion 2. As shown in FIG. 5, the container 6 is a sausage-type soft container formed from a flexible film. The container 6 includes a substantially cylindrical container body 61 formed of a soft film and a nozzle portion 62 screwed to the tip end side of the container body 61. The rear end portion 63 of the container body 61 opposite to the nozzle portion 62 is rounded and serves as a pressed portion pressed by the pressing member 3. Examples of the fluid contained in the container 6 include a sealing material (also referred to as a caulking material) and an adhesive.

The pressing member 3 is movably arranged in the internal space 22 of the cylinder portion 2 in the longitudinal direction of the cylinder portion 2, and is housed in the internal space 22 in order to push out the fluid contained in the container 6 to the outside. Press the container 6. Note that FIG. 1 shows a state in which the pressing member 3 is arranged at the frontmost of the internal space 22 of the cylinder portion 2, and the pressing member 3 is exposed from the through hole 23a of the front end side lid portion 23.

As shown in FIG. 6, the pressing member 3 includes an inner flat region 31 and an outer peripheral bending region 32. The inner flat region 31 is a circular region inside the pressing member 3 and has a flat plate shape. The outer peripheral bending region 32 is a region including the outer peripheral edge 33 of the pressing member 3, and is bent toward the container 6. The region inside the outer peripheral bending region 32 of the pressing member 3 is the inner flat region 31.

At the center of the pressing member 3 (inner flat region 31), a bulging portion 37 that bulges forward in a bowl shape is provided. A nut 34 is embedded in the bulging portion 37. The female screw of the nut 34 extends in the moving direction of the pressing member 3. On the back surface side of the inner flat region 31 of the pressing member 3 (the side facing the retreat prevention member 41 described later), an interval forming protrusion 36 (details will be described later) that protrudes toward the retreat prevention member 41 is provided. ..

The pressing member 3 has a plurality of slits 35. The slit 35 extends inward (center of the circle) from the outer peripheral edge 33 of the pressing member 3 and penetrates in the moving direction of the pressing member 3. In this embodiment, eight slits 35 are provided with the same central angle (22.5 degrees). The slit 35 extends from the outer peripheral edge 33 to the outer peripheral wall (described later) of the space forming protrusion 36. Since the slit 35 is provided, the pressing member 3 is easily deformed in the moving direction of the pressing member 3.

The width of the slit 35 (the width in the direction orthogonal to the direction in which the slit extends) is preferably 0.5 to 3 mm, more preferably 0.5 to 2 mm. If the width of the slit 35 is too narrow, when the pressing member 3 is moved to press the container 6, the air in the internal space 22 of the cylinder portion 2 is difficult to escape through the slit 35, and the pressing resistance tends to be excessive. .. On the other hand, if the width of the slit 35 is too wide, when the pressing member 3 is moved to press the container 6, for example, the slit 35 easily bites the film forming the container 6.

As shown in FIGS. 3 and 4, the retreat prevention member 41 is arranged on the side opposite to the container 6 with respect to the pressing member 3. As shown in FIG. 7, the front side (opposite surface side of the pressing member 3) of the receding prevention member 41 has a flat disk shape. The retreat prevention member 41 has a shape corresponding to the inner flat region 31 of the pressing member 3. The corresponding shape is typically substantially the same shape when viewed in the moving direction of the pressing member 3. The retreat prevention member 41 receives the inner flat region 31 in the pressing member 3 that deforms so as to retreat toward the retreat prevention member 41. The retreat prevention member 41 preferably has a certain degree of rigidity.

As shown in FIG. 4, there is substantially no gap between the outer peripheral edge 33 of the pressing member 3 and the inner surface 22a of the internal space 22 of the cylinder portion 2. The fact that there is virtually no gap means that if the pressing member 3 does not have a slit 35 or a hole, and the pressing member 3 is moved to press the container 6, the inside of the cylinder portion 2 is formed. It means that the air in the space 22 is difficult to escape from the side of the pressing member 3 through between the outer peripheral edge 33 of the pressing member 3 and the inner surface 22a of the internal space 22 of the cylinder portion 2, and the pressing resistance becomes excessive.

The pushing member 3 and the retreat prevention member 41 are connected to the tip end side of the extrusion rod 42 in this order from the front side. The extrusion rod 42 extends in the longitudinal direction of the cylinder portion 2, straddles the internal space 22 of the cylinder portion 2 and the outside, and can freely move (advance and retreat) in the longitudinal direction (front-back direction) of the cylinder portion 2. ..

A male screw 42a is provided at the tip of the extrusion rod 42. The male screw 42a is screwed into the nut 34 of the pressing member 3. The retreat prevention member 41 is fixed to the extrusion rod 42. The above-mentioned spacing forming protrusion 36 of the pressing member 3 is formed in a double peripheral wall shape, and the height of the inner flat region 31 from the back surface side is constant. When the gap forming protrusion 36 abuts on the front surface of the retreat prevention member 41, the distance between the back surface side of the inner flat region 31 of the pressing member 3 and the front surface side of the retreat prevention member 41 is kept constant.

A handle body portion 51 is connected to the rear portion of the cylinder portion 2. At the lower part of the handle body 51, there are a grip 52 integrally connected downward from the handle body 51, a lever 54 rotatably connected to the grip 52 by a rotation pin 53, and a lever 54. A contact pin 57 attached to the upper part of the is provided. When the operator pulls the lever 54, the extrusion rod 42 bridged between the front plate portion 55 and the rear plate portion 56 moves forward.

The extrusion rod 42 penetrates through the through hole 58a of the extrusion plate 58 that comes into contact with the contact pin 57 and the through hole 43a of the braking plate 43 (described later). When the operator pulls the lever 54, the extrusion plate 58 is pushed obliquely via the contact pin 57. Due to the frictional force between the through hole 58a of the extrusion plate 58 and the extrusion rod 42, the lever 54 opposes the forward compression spring 59 extrapolated to the extrusion rod 42 between the front plate portion 55 and the rear plate portion 56. The extrusion rod 42 advances with each stroke.

The braking plate 43 is provided behind the handle body 51. The upper end of the braking plate 43 is engaged with the handle body 51. The braking plate 43 brakes the advanced extrusion rod 42 at the forward position by the through hole 43a penetrating the extrusion rod 42. When the extrusion rod 42 is pulled back backward, the braking plate 43 is pushed forward against the braking compression spring 44 which is extrapolated and is arranged between the rear plate portion 56 and the braking plate 43 in a compressed state. By pushing to, the braking of the extrusion rod 42 is released.

An example of how to use the extrusion gun 1 of the present embodiment will be briefly described. The tip side lid portion 23 is removed from the cylinder portion 2, and the container 6 is arranged in the internal space 22 of the cylinder portion 2. The tip side lid portion 23 is screwed into the cylinder portion 2. The nozzle portion 62 of the container 6 is passed through the through hole 23a of the tip side lid portion 23. In that state, the operator operates the lever 54 to advance the extrusion rod 42. The pressing member 3 connected to the extrusion rod 42 moves forward and presses the rear end portion 63 of the container 6 to discharge the fluid in the container 6.

According to the extrusion gun 1 of the present embodiment, for example, the following effects are exhibited.
In the extrusion gun 1 of the present embodiment, the pressing member 3 has a plurality of slits 35 extending inward from the outer peripheral edge 33 thereof and penetrating in the longitudinal direction of the cylinder portion 2. Therefore, when the pressing member 3 presses the rear end portion 63 of the container 6, the pressing member 3 is easily deformed following the shape of the rear end portion 63 of the container 6. Therefore, the container 6 can be pressed appropriately.

Further, in the extrusion gun 1 of the present embodiment, the region including the outer peripheral edge 33 of the pressing member 3 is bent toward the container 6 to form the outer peripheral bending region 32. Therefore, when the container 6 is pressed, the pressing member 3 easily fits in accordance with the shape of the rounded rear end portion 63 in the container 6.

Further, the extrusion gun 1 of the present embodiment further includes a retreat prevention member 41 arranged on the side opposite to the container 6 with respect to the pressing member 3. The retreat prevention member 41 has a shape corresponding to the inner flat region 31 inside the outer peripheral bending region 32 of the pressing member 3, and the inner flat region 31 of the pressing member 3 that deforms so as to retreat toward the retreat prevention member 41. Take it. Therefore, when the container 6 is pressed, the retreat prevention member 41 can appropriately receive the deformed inner flat region 31 and suppress excessive deformation of the pressing member 3.

Further, in the extrusion gun 1 of the present embodiment, there is substantially no gap between the outer peripheral edge 33 of the pressing member 3 and the inner surface 22a of the internal space 22 of the cylinder portion 2. Therefore, even if the container 6 tries to be deformed outward from the outer peripheral edge 33 of the pressing member 3 when the container 6 is pressed, the deformation can be suppressed, so that the fluid contained in the container 6 can be appropriately brought to the outside. Can be extruded. Further, when there is substantially no gap between the outer peripheral edge 33 of the pressing member 3 and the inner surface 22a of the internal space 22 of the cylinder portion 2, when the container 6 is pressed by the pressing member 3, it is pressed. The air in the internal space 22 in front of the member 3 is compressed, but the air easily flows out to the rear of the internal space 22 in the cylinder portion 2 through the plurality of slits 35 of the pressing member 3. Therefore, it is possible to prevent the pressing resistance from becoming excessive.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and can be implemented in various forms.
The extrusion mechanism of the present invention is not limited to the extrusion gun. The number of slits is not limited to eight, and may be two or more. The number of slits may be, for example, 4 or more, 6 or more, or 8 or more.

The container 6 is not limited to a sausage type film pack (soft container). The container 6 may be a soft cartridge container or various hard containers as long as it can accommodate a fluid. Examples of the hard container include a cartridge container made of paper or plastic, and a double container in which a sausage-type film pack is housed in a hard cylinder body.

1 Extrusion gun (extrusion mechanism)
2 Cylinder part 3 Pressing member 6 Container 22 Internal space 22a Inner surface 31 Inner flat area (inner area)
32 Outer peripheral bending region 33 Outer peripheral edge 35 Slit 41 Retreat prevention member 42 Extruded rod

Claims (3)

A cylinder portion having a columnar internal space, and a cylinder portion in which a container containing a fluid is stored in the internal space.
A pressing member that moves in the longitudinal direction of the cylinder portion to push the fluid housed in the container to the outside and presses the container stored in the internal space of the cylinder portion.
A retreat prevention member, which is arranged on the opposite side of the container to the pressing member, is provided.
The pressing member has a truncated cone shape and has an inner flat region which is an upper surface thereof, and further has a plurality of slits extending inward from the outer peripheral edge thereof and penetrating in the longitudinal direction of the cylinder portion. The region including the outer peripheral edge of the pressing member is bent in a slanted shape of a truncated cone from the inner flat region toward the container to form an outer peripheral bent region.
The retreat prevention member has a shape corresponding to a region inside the outer peripheral bending region of the pressing member, and the inner side of the pressing member deforms so as to retreat while increasing the diameter toward the retreat prevention member. Take the area,
Extrusion mechanism. There is substantially no gap between the outer peripheral edge of the pressing member and the inner surface of the internal space.
The extrusion mechanism according to claim 1. The plurality of slits are arranged in the inner flat region of the truncated cone at equal central angles. The extrusion mechanism according to claim 1 or 2.

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