JPH0642764Y2 - Nozzle clogging prevention device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a nozzle clogging prevention device for preventing clogging of a nozzle that sprays, for example, emulsion glue, more specifically, a hygroscopic body is brought into contact with the tip of the nozzle to bring it into a wet state. Regarding things.

<Prior Art> Conventionally, as a nozzle clogging prevention device of this type, as disclosed in, for example, Japanese Patent Laid-Open No. 59-199073, the tip of the nozzle is arranged downward and supported so as to be reciprocally movable in the horizontal direction. By arranging a liquid tank filled with a hygroscopic body and opening upward in this reciprocating range, and after the glue is sprayed downward from this nozzle, by moving the nozzle toward the hygroscopic body,
In some nozzles, the tip end surface of the nozzle contacts the hygroscopic body and is kept in a wet state.

In addition, as disclosed in Japanese Utility Model Application No. 60-63733, the tip of the nozzle is arranged downward, and either this nozzle or the liquid tank which is filled with a hygroscopic material and opens upward is connected to the other. It is arranged so that it can be reciprocally moved toward and away from it, or the tip of the nozzle is arranged sideways, and either this nozzle or a liquid tank that is filled with a hygroscopic material and opens laterally with respect to the other. The nozzle tip or tip end face is moved by moving the nozzle or the hygroscopic body after the sprayed material is sprayed downward or horizontally from these nozzles. Some of them come into contact with a hygroscopic body and are kept in a wet state.

<Problems to be Solved by the Invention> However, in such a conventional nozzle clogging prevention device, the hygroscopic body is filled in the liquid tank to maintain a wet state, but the tip of the nozzle is arranged upward. In this case, if the liquid tank in the liquid tank is opened downward so as to be opposed to it and an attempt is made to keep it in a wet state by filling it with a hygroscopic material, the liquid in the liquid tank drops and stains the nozzle and its surroundings. There is a problem that the inconvenience of occurs.

Therefore, the upward nozzle is rotatably supported as disclosed in the microfilm of Japanese Patent Application No. 60-63733, and the tip of the nozzle is rotated sideways or downward to turn the nozzle upward or downward. It is conceivable to bring the tip end surface of the nozzle into contact with the hygroscopic body in the liquid tank that opens upward.

However, in this case, the rotation of the nozzle causes the pipe that supplies glue and the like to bend and deform,
There is a problem that a stable function cannot be obtained for a long period of time because it causes damage such as fatigue of the pipe with long-term use.

In view of such conventional circumstances, the present invention aims to bring a hygroscopic body into contact with an immovable upward nozzle so that liquid does not drip, and to dry the hygroscopic body and the tip of the nozzle when not in use for a long time. The other purpose is to prevent.

<Means for Solving the Problem> The technical means taken by the present invention to solve the above problem is that the tip of the nozzle is arranged upward, and the liquid is constantly supplied substantially flush with the tip surface of the nozzle. A liquid supply port is provided so as to open upward, and a hygroscopic body is reciprocally arranged so as to come into contact with the tip surface of the nozzle and the liquid supply port. Is.

The hygroscopic body is formed of a material that is elastically deformable, and the hygroscopic body is housed in a concave portion that is opened downward so as to project toward the tip surface of the nozzle and the liquid supply port, and the peripheral portion of the concave portion is the nozzle. It is preferable that the hygroscopic body is arranged so as to be reciprocally movable in a direction orthogonal to the reciprocating direction extending from the tip end surface of the nozzle to the liquid supply port so as to be in close contact with the step portion continuously provided.

<Operation> According to the above technical means of the present invention, by moving the hygroscopic body and bringing it into contact with the liquid supply port, the liquid is absorbed by the hygroscopic body from the liquid supply port to be in a wet state, and thereafter, By moving the hygroscopic body in the wet state and bringing it into contact with the tip surface of the nozzle, the liquid is supplied from the hygroscopic body to the tip surface of the nozzle and kept in the wet state.

Then, the hygroscopic body is moved in the direction in which the peripheral edge portion of the concave portion is in close contact with the step portion continuously provided with the nozzle, so that the hygroscopic body does not come into contact with the outside air.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings.

In this embodiment, as shown in FIG. 1, the glue injection gun (1) is arranged upward so that the tip surface of the nozzle (1a) is opened horizontally, and water is absorbed from the liquid supply port (2a) as a moisture absorber. The water is absorbed by (3) and becomes wet.

The glue injection gun (1) has an inlet (1b) to which a pipe (not shown) for supplying pressurized emulsion glue, specifically vinyl acetate emulsion glue, is connected, and a passage ((a) leading to a nozzle (1a). It has a valve portion (not shown) for opening and closing (not shown), and the glue is sprayed upward from the nozzle (1a) by the opening and closing movement of the valve portion.

In addition, a liquid supply port (2a) is opened horizontally at a position approximately the same height as the tip end surface of the nozzle (1a) with an appropriate interval.

The liquid supply port (2a) is opened on the upper surface of one end of the water supply pipe (2), and is arranged slightly lower than the height position of the tip end surface of the nozzle (1a) or at the same height position, and these liquid supply ports (2a) are supplied. The hygroscopic body (3) is arranged on the connecting line connecting the mouth (2a) and the nozzle (1a) or on an extension thereof.

The hygroscopic body (3) is made of a water-absorbing material such as sponge that is elastically deformable and at least the lower surface is formed into a substantially flat surface, and is housed on the lower surface of the holder (4).

The holder (4) has a cylindrical recess (4a) opened downward at its tip, and a peripheral edge portion (4b) of this recess (4a) is projected downwardly to form a horizontal shape. The lower surface of the hygroscopic body (3) is projected downward from (4b).

A rod (5a) of a cleaning air cylinder (5) protruding and retracting in the horizontal direction is connected to the base end of the holder (4), and the hygroscopic body (3) is attached to the nozzle (1a) when the rod (5a) is projected. ) On the tip surface of the nozzle), and when the rod (5a) is immersed, the hygroscopic body (3) is located on the liquid supply port (2a) or passes over the port (2a) and is opposite to the nozzle (1a). Position it to the side.

In this embodiment, the holder (4) is detachably divided into two,
The concave portion (4a) side can be replaced together with the hygroscopic body (3), and an adjusting mechanism (not shown) may be provided in the concave portion (4a) so that the protruding amount of the hygroscopic body (3) can be adjusted.

Further, the rod (6a) of the stopping air cylinder (6) protruding and retracting is connected to the supporting piece (5b) for supporting and fixing the cleaning air cylinder (5), and the rod (6a) absorbs moisture when protruding. The lower surface of the body (3) is positioned at the same height as the liquid supply port (2a), and the peripheral portion (4b) of the recess (4a) is positioned higher than the height of the tip surface of the nozzle (1a). When the rod (6a) is immersed with the moisture absorber (3) positioned on the tip surface of the nozzle (1a), the recess (4a)
The peripheral portion (4b) of the nozzle is lowered and positioned so as to be in close contact with the inclined step portion (1c) continuously provided below the nozzle (1a).

On the other hand, the water supply pipe (2) is fixed in a substantially U shape,
A water supply port (2b) is opened higher than the height position of the liquid supply port (2a) on the upper surface of the other end opposite to the liquid supply port (2a), and the water tank (7) is located in the water supply port (2b). Insert and place the bottom edge of.

The water storage tank (7) stores water inside, and a cylindrical portion (7a) having a diameter smaller than the inner diameter of the water supply port (2b) is projectingly provided at the lower end of the water storage tank (7) on the lower end surface of the cylindrical portion (7a). The horizontal spout (7b) is opened, and the tubular portion (7a) is inserted into the water supply port (2b) in a loose fitting state in the mounted state, and the height position of the spout (7b) is set to the above liquid supply port ( Place it on the same plane as 2a).

In this embodiment, a plurality of adjusting screws (8) are respectively screwed to the peripheral edge portion (2c) of the water supply port (2b) so as to be able to move up and down, and the upper end of each adjusting screw (8) contacts the water storage tank (7). The height position of the spout (7b) can be finely adjusted by moving it up and down in the contact state.

Next, the operation of the nozzle clogging prevention device will be described.

First, when the glue is sprayed from the nozzle (1a) of the glue spray gun (1), the rod (6a) of the stop air cylinder (6) is projected and the rod (5) of the cleaning air cylinder (5) is ) Is immersed and the hygroscopic body (3) waits on the liquid supply port (2a) (FIG. 2) or on the opposite side of the nozzle (1a).

Then, when the spraying of the glue is stopped or when the spraying of the glue is finished several times, the rod (5) of the cleaning air cylinder (5) is
a) so that the hygroscopic body (3) can move the nozzle (1)
It returns to its original position via the tip surface of a) (Fig. 1).

At this time, the hygroscopic body (3) is placed on the liquid supply port (2a) while standing by or when passing through the liquid supply port (2a).
Water is sucked from a), and this water is given to the glue remaining on the tip surface of the nozzle (1a) to make it hard to cure, and the lower surface of the hygroscopic body (3) is elastic along the tip surface of the nozzle (1a). It deforms and scrapes off the glue by using the friction generated between them.

Further, when water is sucked from the liquid supply port (2a) by the hygroscopic body (3) and the water level is lowered, the water level of the water inlet (2b) is also lowered, and air is supplied to the inner surface of the water inlet (2b) and the cylinder. Shape (7
a) By passing between the outer surface and the spout (7b) and entering the water storage tank (7), the reduced amount of water is poured into the spout (7).
Water is automatically supplied from b) to the water supply port (2b), and the water level of the liquid supply port (2a) is always kept constant.

Also, if the glue is not sprayed for a long time,
With the rod (5a) of the cleaning air cylinder (5) still protruding, the rod (6) of the stop air cylinder (6) is
a) is immersed to lower the peripheral edge portion (4b) of the concave portion (4a), so that the hygroscopic body (3) is brought into close contact with the inclined step portion (1c) continuously provided below the nozzle (1a). ) Is not exposed to the outside air, and the tips of the hygroscopic body (3) and the nozzle (1a) are prevented from drying.

In the embodiment shown above, the hygroscopic body (3) was linearly reciprocated by the cleaning air cylinder (5), but the invention is not limited to this. For example, it may be moved in the circumferential direction by an unexpected drive source. Also, the stopping air cylinder (6) may not be provided.

<Advantages of the Invention> The present invention having the above-described configuration has the following advantages.

By moving the hygroscopic body and bringing it into contact with the liquid supply port, the liquid is absorbed by the hygroscopic body from the liquid supply port to be in a wet state, and thereafter, the hygroscopic body in the wet state is moved to move the tip surface of the nozzle. Since the liquid is supplied from the hygroscopic body to the tip end surface of the nozzle and is kept in a wet state by contacting with, the hygroscopic body can be brought into contact with the immovable upward nozzle so that the liquid does not drip.

Therefore, when it is attempted to maintain the wet state by opening the liquid tank downward so as to face the nozzle facing upward and filling the hygroscopic body, compared with the one in which the liquid in the liquid tank drops.
The nozzle and its surroundings are clean and easy to use. Furthermore, by rotating the tip of the nozzle sideways or downward, the tip surface of the nozzle contacts the moisture absorber inside the liquid tank that opens upward or sideways. Compared with the one that does, the pipe that supplies glue etc. connected to the nozzle does not bend, and a stable function can be obtained over a long period of time.

By moving the moisture absorber in the direction in which the peripheral edge of the recess closely contacts the stepped portion that is continuous with the nozzle, the moisture absorber was prevented from coming into contact with the outside air, so that glue or the like could not be sprayed from the nozzle for a long time. Even at the time of use, the hygroscopic body and the tip of the nozzle can be prevented from drying.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of a nozzle clogging prevention device according to an embodiment of the present invention, showing a state in which a hygroscopic body is located on a tip surface of a nozzle, and FIG. 2 is a diagram showing a hygroscopic body located on a liquid supply port. FIG. 3 is a partially cutaway front view showing a state in which it is not used, and FIG. 3 is a partially cutaway front view showing a unused state for a long time. 1a ... Nozzle, 1c ... Stepped portion 2a ... Liquid supply port, 3 ... Hygroscopic body 4a ... Recessed portion, 4b ... Peripheral portion

Claims (2)

[Scope of utility model registration request] 1. A nozzle clogging prevention device in which a hygroscopic body is brought into contact with a tip of a nozzle to keep it in a wet state, the tip of the nozzle is arranged upward, and liquid is always on the same plane as the tip surface of the nozzle. The liquid supply port to be supplied is arranged so as to open upward, and the hygroscopic body is reciprocally arranged so as to come into contact with the tip surface of the nozzle and the liquid supply port. Nozzle clogging prevention device. 2. The hygroscopic body is formed of a material capable of elastic deformation,
The hygroscopic body is housed in a concave portion that opens downward so as to project toward the tip surface of the nozzle and the liquid supply port, and the hygroscopic body is arranged so that the peripheral edge portion of the concave portion is in close contact with the step portion that is connected to the nozzle. The reciprocating motion is arranged in a direction orthogonal to the reciprocating direction extending from the front end surface of the to the liquid supply port.
The nozzle clogging prevention device described.