JPS6211840Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a liquid injection gun that presses liquid into an injection port having a specific shape.

For example, in the automobile manufacturing process, when pressurizing brake fluid from a reservoir tank into a piping system,
Conventionally, brake fluid was press-injected from the injection gun by pressing a sealing member such as rubber provided on the flange near the tip of the injection gun to the upper or outer edge of the reservoir tank injection port. As a result, the seal between the tip of the injection gun and the reservoir tank injection port becomes incomplete, and the brakes may fail due to reasons such as difficulty in maintaining parallelism between the flange of the injection gun and the upper edge of the injection port. There was a problem where liquid leaked from the seal.

This invention focuses on the above-mentioned points, and aims to provide a liquid injection gun that can provide a highly reliable seal at a press-contact point so that liquid can be injected into an injection port having a specific shape without leaking.

Hereinafter, embodiments of this invention will be described based on the drawings. Fig. 1 shows a side view of the liquid injection gun, and Fig. 2 shows its vertical cross-sectional view. Reference numeral 11 is a cylindrical body having a connection part for a liquid supply hose 12 at its upper part and a flange part 11b at its lower end. A collar 23 is inserted and screwed into the lower end of the main body 11 so as to be closely attached to the collar 11b, and arms 15 and 1, which will be described later, are attached to the upper end of the collar 23.
5' and a holding member 11c that pivotally supports the handle 19.
At the same time, the sliding cylinder 13 shown in FIG. 4 is slidably fitted onto the main body 11 with the sliding ring 14 shown in FIGS. 5 and 6 fitted into its lower part. . That is, the claw portion 13 is provided at the bottom of the sliding cylinder 13.
A is formed in the sliding ring 14, and a square hole 14a is formed in the sliding ring 14, into which the claw portion 13a is inserted.The sliding ring 14 is inserted into the sliding cylinder 13 through the square hole 14a through the claw portion 13a. Prior to externally fitting the sliding cylinder 13 onto the main body 11, the O-ring 21 for sealing the inner surface of the inlet and the ring body 13b are fitted onto the outer periphery of the collar 23 to clamp the O-ring 21 together with the ring body 1b. The claw portion 13 is placed on the upper surface of the flange portion 11b so as to
The tip of a and the ring body 13b are in contact with each other so as to be able to move toward and away from each other. An O-ring 22 for sealing the inlet edge is attached to the outer peripheral corner of the recess formed at the lower end of the sliding ring 14.
is inserted. 20 is a sliding cylinder 13 and a sliding ring 14
It is a coil spring inserted between the sliding ring 1
4 is urged downward, and at the same time, the sliding cylinder 13 is urged upward. Arms 15 and 15' are pivotally supported downward by pins 27 and 27' on the holding member 11c of the main body 11, and claws 15a and 15a' for holding the outside of the injection port edge are attached to the lower part. There is. 19 is a handle pivotally supported by a pin 24 on the holding member 11c of the main body 11, and arms 15, 15'
and a link 16,1 for operating the sliding cylinder 13.
It is linked to a link mechanism consisting of 7 and 18 with a pin 25. The links 16, 17, and 18 are connected by a pin 26 pivotally supported by the sliding cylinder 13 (FIG. 3). That is, this link mechanism moves the claws 15a, 15a' of the arms 15, 15' on both sides to engage with the edge of the injection port, and also moves the claws 15a, 15a' of the arms 15, 15' on both sides to engage with the edge of the inlet, and also
In order to move the sliding cylinder 13 so as to compress and deform the O-ring 21 for sealing the inner surface of the injection port between the handle 19 and the flange 11b at the lower end of the main body, the handle 19 and the arm 1 are moved.
5, 15' and the sliding cylinder 13. Then, by operating the handle 19 downward, the arms 15, 15' are moved to their claws 15a, 15.
a' inward, the sliding cylinder 13 descends to the lower end, and the claw part 13a passes through the ring body 13b to the O-ring 21.
The O-ring 21 is pressed against the flange 11b from above to compress the O-ring 21.

Next, the operation of this liquid injection gun will be explained. First, when setting the liquid injection gun in the reservoir tank 1, as shown in FIG. 7, the handle 19 is positioned upward, the arms 15, 15' are opened, and the sliding cylinder 13 is slid upward. Then, insert the flange 11b, O-ring 21, and ring body 13b at the tip of the main body 11 into the injection port 2, and insert the sliding ring 1.
4 onto the inlet rim 3 via the O-ring 22. Subsequently, by pushing down the handle 19, the sliding cylinder 13 is lowered via the link mechanism, and its claw portion 13a compresses and deforms the O-ring 21 between it and the collar portion 11b via the annular body 13b. let As a result, the O-ring 21 becomes flat and expands in the outer circumferential direction, and its outer circumferential surface becomes the inner surface of the injection port 4.
At the same time, the claws 15a, 15a' of the arms 15, 15' hold the outer side of the inlet edge 3, and the O-ring 22 together with the sliding ring 14 presses against the inlet edge. A double seal is applied at the injection port 2 along with a seal by the O-ring 21, and the injection port 2 is completely set to prevent leakage.

Next, when the liquid injection gun is removed from the injection port 2, by pushing up the handle 19, the sliding cylinder 13 is moved via the link mechanism as shown by the two-dot chain line in FIG. Then, it rises and stops when it comes into contact with the holding member 11c, and the sliding cylinder 13 and the handle 19 are held in the raised position by the coil spring 20. At the same time, arms 15, 15' open outward as shown in FIG. As the sliding cylinder 13 rises, the claw portion 13a separates from the annular body 13b, and the annular body 13b becomes free, and the O-ring 21 returns to its original shape and is no longer pressed against the inner surface 4 of the injection port. .

After that, by moving the liquid injection gun upward, the ring body 13b, the O-ring 21, and the flange 1 at the tip are removed.
1b can be easily extracted from the inner surface 4 of the injection port.

As described above, according to the liquid injection gun according to this invention, the sliding cylinder is slidably fitted onto the lower part of the cylindrical main body with a flange formed at the lower end, and the sliding cylinder is fitted onto the lower part of the sliding cylinder. A sliding ring is fitted so that it can slide up and down, and an O-ring for sealing the edge of the injection port is fitted to the lower end of the sliding ring, and claws that engage the edge of the injection port are installed on both sides of the main body. An O-ring for sealing the inner surface of the inlet is placed on the flange at the lower end of the sliding cylinder via a ring, and the claws on both arms are attached to the edge of the inlet. A link mechanism is installed between the handle and the arms on both sides to move the sliding cylinder so as to engage it and to compress and deform the O-ring for sealing the inner surface of the inlet between the annular body and the flange at the lower end of the main body. and the sliding cylinder. Therefore, when the tip of the injection gun is inserted into the injection port and set,
The O-ring for sealing the inner surface of the inlet is compressed and deformed, and its expanded outer peripheral surface is pressed against the inner surface of the inlet, and the O-ring for sealing the edge of the inlet at the bottom of the sliding ring is pressed against the edge of the inlet. Due to the double seal, even if the center of the injection gun is tilted to the injection port or the upper edge of the injection port is not flat, the liquid can be injected without leaking to the outside. In addition, the link mechanism allows for easy setting into the injection port.

[Brief explanation of the drawing]

The figures show an embodiment of this invention, in which Fig. 1 is a side view of the liquid injection gun, Fig. 2 is a longitudinal sectional view thereof, Fig. 3 is a sectional view taken along line A-A in Fig. 1, and Fig. 4 is a sliding FIG. 5 is a perspective view of the cylinder, FIG. 5 is a plan view of the sliding ring, FIG. 6 is a sectional view taken along line BB in FIG. 5, and FIG. 7 is a schematic perspective view of the liquid injection gun set in the reservoir tank. be. 11... Main body, 11b... Flange, 11c... Holding material, 13... Sliding cylinder, 13b... Ring body, 14
... Sliding ring, 21, 22 ... O ring (sealing member), 16, 17, 18 ... Link.

Claims (1)

[Scope of utility model registration request] a sliding cylinder fitted slidably onto the lower part of a cylindrical main body having a flange at its lower end, a sliding ring fitted so as to be slidable up and down, an O-ring for sealing the edge of the injection port fitted onto the lower end of the sliding ring, arms and handles pivotally supported on both sides of the main body, the arms having claws at their lower parts which engage with the edge of the injection port, an O-ring for sealing the inner surface of the injection port being disposed on the flange at the lower end of the sliding cylinder via a ring body, and a link mechanism is provided between the handle, the arms on both sides, and the sliding cylinder for moving the sliding cylinder so as to engage the claws of the arms on both sides with the edge of the injection port and to compressively deform the O-ring for sealing the inner surface of the injection port between the ring body and the flange at the lower end of the main body.