JP4017134B2 - Liquid injection device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquid injection device that is attached to an injection port such as a radiator tank or a fuel tank and injects a liquid.
[0002]
[Prior art]
Examples of the conventional liquid injection device include those disclosed in Japanese Utility Model Laid-Open No. 5-58699 and Japanese Utility Model Laid-Open No. 7-40599 filed earlier by the present applicant. The former supplies air, deforms the elastic member and presses it against the outer surface of the inlet, and the latter locks the sphere to the edge of the inlet, It is a technology that connects to the inlet.
[0003]
[Problems to be solved by the invention]
However, according to these techniques, although the operation of attaching and detaching the liquid injection device with respect to the injection port is simplified, the mechanism and structure inside the device are complicated, the number of members increases, and the manufacturing cost increases. there were. In addition, since it has a structure that uses the outer surface side of the edge of the injection port as the connection part of the liquid injection device, the size in the radial direction is increased accordingly, resulting in an increase in size of the device. There is also a problem that the labor increases due to the increased weight and the operator who repeatedly performs the injection work on the line.
[0004]
The present invention was created to solve the above-described problems, has a simple structure and can be manufactured at low cost, and can be reduced in size and weight, thereby reducing the labor burden on the operator. An object of the present invention is to provide a liquid injection device that can be reduced.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a nozzle that can be inserted into an injection port , and a screw portion in which a male screw portion that can be screwed into a female screw portion formed in the injection port is formed on an outer peripheral surface. , and the threaded portion a separate member, and integrated by engagement of the screw portion and the screw, and a rotation operating member which is mounted rotatably to the nozzle via a bearing, fastening of the screw By removing the screw portion, the screw portion is configured to be replaceable in a plurality of specifications corresponding to the female screw portion having different screw diameters or pitches, and the rotational operation member is disposed outside the screw portion in the rotational radius direction. A liquid injecting device characterized in that it is positioned and maintains a rotational force was constructed. According to this configuration, an economical liquid injection device is realized with a simple structure.
[0006]
In addition, since the rotational operation member is positioned outside the screw portion with respect to the rotational radius direction so as to maintain the rotational force, the mounting operation to the injection port is facilitated.
[0007]
Further, by adopting a configuration in which the screw portion is screwed to the inner surface side of the injection port, the size can be reduced, and the labor burden on the operator can be reduced.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view of a side surface (partly in section) of a liquid injection device according to the present invention, and FIG. 2 is an exploded perspective view thereof. In the following description, “upper and lower” refers to the upper and lower sides in FIG.
[0009]
The liquid injection device A according to the present invention is used as, for example, a gasoline injection gun for injecting gasoline into a vehicle near the final process of an automobile assembly line, and an injection port B (shown in phantom lines) such as a gasoline tank. ) And a screw portion (screw member 2) that can be screwed into the injection port B, and is rotatably attached to the nozzle 1 via a bearing (universal bearing 3). The structure is provided with the member 4. The nozzle 1 is a cylindrical member that is bent in the middle and has two eccentric shafts. One end side is a nozzle port that is inserted into the injection port B, and the other end side is a liquid supply port (not shown). The joint part 5 connected to is attached.
[0010]
The universal bearing 3 is a spherical member having a cut surface exposed vertically, a flange portion 1a formed on the outer peripheral surface above the bent portion of the nozzle 1, a bush 6 and a retaining ring 7 positioned on the lower side. Thus, the vertical movement is restricted and the nozzle 1 is fitted and fixed to the outer periphery.
[0011]
Reference numerals 8 and 9 denote a first air bleed holder and a second air bleed holder, respectively, which are disk-shaped members interposed between the universal bearing 3 and a rotation operation member 4 described later. The first air bleeder holder 8 is formed such that a nozzle insertion hole 8a for allowing the nozzle 1 to pass therethrough penetrates in the center portion in the vertical direction, and a ring shape between the nozzle insertion hole 8a and the outer peripheral surface. A plurality of counterbored screw through-holes 8b (FIG. 2) penetrated in the upper and lower surfaces are formed at equal intervals in the circumferential direction (four in this embodiment), and the counterbored screw-through holes 8b are further formed. There are two air vent holes 8c for injecting liquid such as gasoline so as to penetrate the upper and lower surfaces so as not to interfere with each other. The second air bleeder holder 9 is a member having the same outer diameter as the first air bleeder holder 8 and formed with the same arrangement of nozzle insertion holes 9a, screw holes 9b (FIG. 2), and air bleed holes 9c. . The upper side of the inner peripheral surface of the nozzle insertion hole 9 a is cut out in the circumferential direction so as to have a slightly larger diameter than the lower side of the inner peripheral surface so as not to interfere with the spherical surface portion of the universal bearing 3. . Therefore, the plurality of screws 13 (FIG. 2) sandwich the universal bearing 3 from above and below by the lower end portion 8d of the inner peripheral surface of the first air bleed holder 8 and the upper end portion 9d of the inner peripheral surface of the second air bleed holder 9. ), The first air bleeder holder 8 and the second air bleeder holder 9 are integrated with each other so as to be rotatable and eccentric with respect to the axis of the nozzle 1. The material of the first air bleeder holder 8 and the second air bleeder holder 9 is both aluminum from the viewpoint of weight reduction.
[0012]
The lower part of the outer peripheral surface of the first air bleeder holder 8 and the upper part of the outer peripheral surface of the second air bleeder holder 9 are each notched so as to have a slightly smaller diameter in the circumferential direction. The bush 10 is fitted in both the notch spaces. The outer diameter of the bush 10 is larger than the outer diameter of the first air bleeder holder 8 and the second air bleeder holder 9.
[0013]
Next, the rotation operation member 4 is a member having a substantially cylindrical shape, and a plurality of screw through holes 4a penetrating vertically are provided at equal intervals in the circumferential direction (six in this embodiment). Is formed. A plurality of grooves 11 (FIG. 2) cut out in the vertical direction are formed at equal intervals in the circumferential direction as a part for hooking a finger on the outer peripheral surface of the rotation operation member 4. Further, the inner peripheral surface side of the rotation operation member 4 is formed so as to have a small diameter, a medium diameter, and a large diameter in order from the top, and the bush 10 is fitted into the medium diameter portion.
[0014]
Reference numeral 2 denotes a screw member attached to the lower portion of the rotation operation member 4, and the center portion is hollow to allow the nozzle 1 to be inserted vertically. The upper side of the screw member 2 forms a large-diameter disk that can be fitted into the large-diameter portion of the inner peripheral surface of the rotation operation member 4, and the lower side has a small-diameter portion that is concentrically formed. A male screw portion 2a is formed on the surface so as to be screwed into a female screw portion C formed on the inner surface side of the injection port B. A plurality of screw holes 2 b are provided on the upper surface of the large-diameter portion of the screw member 2 so as to be arranged in the same arrangement as the screw through holes 4 a of the rotation operation member 4. The screw member 2 is fastened and fixed integrally. At this time, the rotation operation member 4 is positioned outside the screw member 2 in the rotation radius direction.
[0015]
In the present embodiment, the first air vent holder 8 and the second air vent holder 9, the rotation operation member 4, and the screw member 2 are integrated by increasing the frictional resistance of the bush 10. Further, the frictional resistance of the bush 10 can be reduced, and the rotation operation member 4 and the screw member 2 can be configured to be rotatable relative to the first air bleeder holder 8 and the second air bleeder holder 9.
[0016]
Next, the usage method and operation of the liquid injection device A having the above configuration will be described.
When injecting gasoline into a finished vehicle in the vicinity of the final process of the automobile assembly line, an operator first manually holds the nozzle 1 connected to a gasoline supply port (not shown) via a rubber hose (not shown), and the tip of the nozzle Then, the rotary operation member 4 is manually rotated. The rotation operation member 4 is in a state of being eccentric with respect to the nozzle 1, and the rotation operation member 4 is located on the outer side in the radial direction with respect to the screw member 2. In other words, the centrifugal force acts strongly, and the effect that the damping rate of the rotational force is reduced is exhibited. Therefore, the operator simply rotates the rotary operation member 4 with a small force, so that the male screw portion 2a of the screw member 2 is screwed into the female screw portion C of the injection port B, and liquid injection into the injection port B is performed. Device A is very easy to install. Moreover, in this embodiment, since the screw member 2 is screwed into the female screw portion C formed on the inner surface side of the injection port B, the outer diameter of the liquid injection device A can be reduced. It is lightweight and reduces the labor burden on the workers.
[0017]
When the gasoline injection is completed, the operator manually rotates the rotation operation member 4 in the direction opposite to the rotation direction at the time of mounting, thereby disengaging the screw member 2 from the injection port B, Pull out from the inlet B to finish the gasoline injection work.
[0018]
In the present embodiment, as described above, the rotation operation member 4 and the screw member 2 are separate members and are integrated by fastening with the screw 12. With this configuration, for example, when the screw diameter or pitch of the female screw portion C of the injection port B differs depending on the type of automobile, if a plurality of screw members 2 corresponding to each female screw portion C are prepared, the nozzle The main components such as 1 and the rotation operation member 4 can be used as they are, which is economical.
[0019]
Further, in this embodiment, by using the universal bearing 3, the rotation operation member 4 is configured to be rotatable and eccentric with respect to the nozzle 1, thereby improving the operability of the liquid injection device A. The effect of the present invention can be obtained by using a normal fixed shaft type bearing so that the rotation operation member 4 is simply rotatable relative to the nozzle 1.
[0020]
The preferred embodiment of the liquid injection device according to the present invention has been described above. Since the above-mentioned rotating operation member plays a role of weight during rotation, it is desirable that the material is relatively heavy, such as steel, but of course, it is formed of a material such as aluminum giving priority to weight reduction. Also good. In addition, the shape and mounting position of each component member are not limited to those described in the drawings, and can be changed in design without departing from the gist of the present invention.
[0021]
【The invention's effect】
According to the present invention, the following effects can be obtained.
(1) A configuration including a nozzle that can be inserted into the injection port, a screw portion that can be screwed into the injection port, and a rotation operation member that is integrated with the screw portion and is rotatably attached to the nozzle via a bearing. In this case, since the structure is simple and the number of members is small, the assembly of the apparatus is facilitated, and an economical liquid injection apparatus is realized.
(2) Further, the rotational operation member is positioned outside the screw portion with respect to the rotational radius direction so as to maintain the rotational force, so that the rotational operation member plays a role of weight when rotating. Thus, the liquid injection device can be attached to the injection port with a small force, and the mounting property of the liquid injection device can be improved.
(3) Further, by adopting a configuration in which the screw portion is screwed to the inner surface side of the injection port, the outer diameter dimension of the liquid injection device can be reduced, and the weight is reduced, resulting in a labor burden on the operator. Can be reduced.
[Brief description of the drawings]
FIG. 1 is an explanatory view of a side surface (partial cross section) of a liquid injection device according to the present invention.
FIG. 2 is an exploded perspective view of a liquid injection apparatus according to the present invention.
[Explanation of symbols]
A Liquid injection device B Inlet C Female screw part 1 Nozzle 2 Screw member 2a Male screw part 3 Universal bearing 4 Rotating operation member 5 Joint part 6 Bush 7 Retaining ring 8 First air vent holder 9 Second air vent holder 10 Bush 12, 13 screw

Claims (2)

A nozzle that can be inserted into the inlet, said the female screw portion formed in the inlet be freely screwed male screw portion is threaded portion formed on an outer peripheral surface, a a member separate from said threaded portion And a rotation operation member that is integrated by fastening the screw portion and the screw, and is rotatably attached to the nozzle via a bearing ,
By unfastening the screw, the screw portion is configured to be replaceable in a plurality of specifications corresponding to the female screw portion having a different screw diameter or pitch,
The said rotation operation member is located outside the said screw part regarding a rotation radial direction, and maintains the rotational force, The liquid injection apparatus characterized by the above-mentioned. The liquid injection device according to claim 1, wherein the screw portion is configured to be screwed to an inner surface side of the injection port.

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