JPH0441114Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The disclosed technology is a technology for the structure of an injection gun used when injecting liquid such as cooling water into the main tank of an automobile radiator and sub-tanks such as reserve tanks. Belongs to a field.

Therefore, this invention provides a method for injecting a predetermined liquid such as cooling water from the inlet of a radiator, etc., which has respective inlets that connect the coolant to a plurality of tanks to be filled, such as the main tank and sub-tanks. The outer cylinder is applied to the supply inlet, and the inner cylinder supported by the outer cylinder advances with the supply inlet blocked, which closes the inlet for the sub-tank among the inlets for each tank, and closes the inlet for the sub-tank to the outside air. After the inside of the sealed main tank is vacuumed by a vacuum pump through the passage in the inner cylinder, a predetermined amount of coolant is injected from the coolant tank, and then the inner cylinder retreats to connect the injection port to the sub-tank. This invention relates to an injection gun structure for injecting coolant into the sub-tank, and in particular, the injection gun has a passage connecting the coolant tank and the tip of the inner cylinder of the injection gun to the supply port, and a separate sub-tank. This invention relates to an injection gun structure in which a liquid passage is provided.

<Prior Art> As is well known, an automobile engine explodes gasoline in a cylinder, resulting in a high temperature state, and in the case of a liquid-cooled engine, a coolant such as cooling water is used to prevent the cylinder from overheating. The heat is circulated within a water jacket provided in the radiator and cylinder, and the heat absorbed from the cylinder is released to the outside air by the heat dissipation action of the radiator.

In addition, the volume of coolant such as cooling water that exchanges heat fluctuates, and a radiator or water jacket with a limited fixed volume cannot respond to these fluctuations, so a sub-tank of the reserve tank that communicates with the radiator is The radiator is provided with an inlet for the radiator body and an inlet for the reserve tank adjacent to each other in the inlet of the radiator, and is connected to the reserve tank by a pipe. A predetermined amount of coolant is always filled.

However, when initially injecting coolant during the automobile manufacturing process, due to the structure of the radiator, there is insufficient air release during injection. It is necessary to create a vacuum inside the butt, 1
Conventionally, injection guns have been used in which a single injection gun is used to perform both evacuation and injection of coolant.

The seed injection gun has a neck-like part with a seat at the inlet of the radiator, and has an inlet connected to the sub-tank adjacent to it, so the cylinder mechanism consisting of an outer cylinder and an inner cylinder The supply port is blocked with the outer cylinder, the inner cylinder is brought into close contact with the seat surface using an air supply/discharge device, etc., and communicated with the radiator and water jacket, and the vacuum pump is operated to close the radiator and water jacket. After creating a vacuum inside the jacket, coolant is injected from the tank via a pump, and when the coolant is filled in the radiator and water jacket, the inner cylinder is opened via the air supply/discharge device. It is designed so that it can be removed from the seat surface and filled into the sub-tank.For example, as shown in Figure 5, its appearance has a diameter corresponding to the inlet A of the radiator for cooling the engine of a car. The injection gun 1' has a cylindrical shape with a part of its inner cylinder exposed, and has a hole 3 bored in the center of a bottomed casing 2' which is uniformly bored around its central axis, and a pipe 4. separates the air and cooling liquid passage 17 from the pressurized chamber 17' of the air supply/discharge device, and a union joint 5 is screwed onto the pipe 4 to connect the pump 7 and the cooling liquid It is connected to a tank 8 and also to a vacuum pump 10 having a pressure gauge 9.

Further, the casing 2' has a tap hole 11 machined in the upper surface, a union joint 12 is screwed into the tap hole 11, and is connected to an air tank 14 via an air supply/discharge device 13.

Reference numeral 15' denotes an inner cylinder, and a flange 1 is provided at the base end of the inner cylinder, which slides against the inner surface of the casing 2'.
6, the upper end surface of which constitutes the lower part of the pressurized chamber 17' formed by the air supply/discharge device 13, and this portion is processed so as not to interfere with the pipe 4.

Thus, an air and coolant passage 17 is formed that passes through the interior of the injection gun 1'.

The tip of the inner cylinder 15' is shaped to attach a packing 25, and the inner cylinder 15' is inserted into the casing 2'. A mold spring 18 is attached.

Next, the inner cylinder support 19', which has the same outer diameter as the casing 2' and a predetermined thickness, has a support hole in the center thereof through which the inner cylinder 15' is inserted.
A notched portion 20 is formed to facilitate penetration of the portion 5'.

A ring-shaped seal packing 24 facing the radiator inlet A is disposed on the lower surface of the inner cylinder support 19', and the tip of the inner cylinder 15' is inserted into the support hole of the inner cylinder support 19'. is connected to the casing 2' in an inserted state, and at the same time holds the end of the spring 18.

A short cylindrical gasket 25 is attached to the side surface of the end of the inner cylinder 15' and can be inserted into the clearance between the radiator's intake port A and its seat surface B.

Further, the supply port A is also provided with a fill port C that connects to the reserve tank.

<Problems to be Solved by the Invention> However, the injection gun 1' of the above-mentioned conventional mode is capable of injecting from a single inlet into a closed space in a water jacket or a radiator, which has a complicated shape and is formed in the cylinder block of an engine. Because of this, normal injection does not allow for sufficient and complete filling of coolant due to air pockets in various places, etc.
In addition, since the injection time is longer, the coolant is injected after the air has been removed from the space, and although the time required for vacuuming is necessary, it is time-consuming to manufacture the car. Even if the cycle time in the process is shortened, it is a finite amount of time, so the injection gun 1'
Two passages are responsible for the flow of coolant in two directions: injection of coolant and air removal, and there is a structural drawback in that coolant cannot be injected into two radiators at the same time due to the necessity of evacuation.

In a process with a high operating rate such as assembly line work in the automobile assembly process, the time required for vacuuming is a kind of lost time for the assembly line operation, and the processing to be efficiently transferred to other processes is difficult. This is practically difficult, and in order to cope with this, two injection guns are used, which, together with the complexity of the work, causes various inconveniences in equipment management, maintenance, etc.

The inlet of the radiator has a fixed shape, and the injection gun is designed to match the inlet, and as can be seen in FIG. 5, the passage 17 of the inner cylinder 15' can be enlarged without limit. , there is a design difficulty in that it is difficult to install a complicated mechanism,
Although it is necessary to have a simple structure, there is no injection gun that satisfies these above-mentioned conditions, and in the end two injection guns have to be used, which is a negative point.

The purpose of this invention is to design the injection gun based on the above-mentioned conventional technology to have the original function, but under the condition that the cycle time is limited, the time required for evacuation and injection of coolant is not necessary. We considered the problems that arise when using an injection gun as a technical issue to be solved, and while taking advantage of the advantages of conventional injection guns, we aimed to effectively reduce the evacuation time and coolant injection time in a limited space. In addition, it is possible to perform all necessary coolant injection processing within the cycle time with one machine, maintain harmony with other processes in the automobile manufacturing process, and ensure that necessary and sufficient coolant injection is performed. It is an object of the present invention to provide an excellent liquid injection gun that can be used in the automotive industry to benefit the application of liquid handling technology in the automotive industry.

<Means for solving the problem> In order to solve the above-mentioned problem, the structure of this invention, which is based on the scope of the above-mentioned utility model registration claim, is based on the above-mentioned purpose. A passage that has an outer cylinder whose tip is in close contact with the inner cylinder and an inner cylinder inside the outer cylinder, and is connected to the liquid tank and the vacuum pump via a switching valve to the inner cylinder that closes one of the injection ports. In the injection gun structure, a gasket is provided at the tip of the inner cylinder connected to the liquid tank and in close contact with the one injection port, and a liquid passageway connected to the other injection port is provided in the outer cylinder. This was achieved by taking technical measures.

<Function> Thus, the water jacket installed in the engine block of an automobile, etc. and the radiator are connected with a hose to form the main tank, and the inlet of the reserve tank of the sub-tank is attached to the inlet of the radiator, and the inlet of the reserve tank of the sub-tank is provided for cooling. Place the injection gun used for injecting the liquid in the injection position with its inner cylinder facing the inlet, and turn on the air supply/discharge device to advance the inner cylinder of the injection gun and insert it into the main tank inlet of the radiator. Then, set the switching valve where the vacuum pump and coolant tank are connected to the side that communicates with the vacuum pump, and in that state, the inner cylinder is connected to the main tank, making sure that it does not interfere with the liquid passage. First, open the valve to pass the same quality coolant through the liquid passage that communicates with the sub-tank separately installed in the injection gun, and then insert the main tank,
Ensure that coolant is injected into the sub-tank,
The vacuum pump operates to evacuate the water jacket of the engine block and the inside of the radiator.
After the evacuation process is completed, the switching valve is switched to the coolant tank side to inject the coolant into the vacuumed main tank and sub-tank, and after the main tank is evacuated, the cooling The cooling liquid can also be injected into the sub-tank within the time required for liquid injection, that is, within the cycle time.

<Example> Next, an example of this invention will be described below based on FIGS. 1 to 4. Incidentally, parts having the same features as those in FIG. 5 will be explained using the same reference numerals.

In the embodiment shown in FIGS. 1 and 2, reference numeral 1 is a liquid injection gun for cooling water, which forms the center of the gist of this invention, and its casing 2 is made of a cylindrical metal with a predetermined diameter and is oriented toward its central axis. For example, a hole 3 of a predetermined diameter is drilled in the upper bottom part in a part that coincides with the center axis of the boring process, and a hole 3 of a predetermined diameter is bored in the upper bottom part in a part that matches the central axis of the boring process. 4 is screwed on.

A union joint 5 is screwed onto the base end of the pipe 4, and is connected via a switching valve 6 to a cooling water tank 8 having a pump 7, and also to a vacuum pump 10 having a pressure gauge 9. ing.

The switching operation of the switching valve 6 is performed by detection by the pressure gauge 9 of the vacuum pump 10.

Further, the casing 2 has a tap hole 11 machined in the upper bottom portion, and a union joint 12 is screwed into the casing 2 to connect it to an air tank 14 via an air supply/discharge device 13.

The inner cylinder 15 has a flange 16 at its rear end that slides against the inner surface of the casing 2. When inserting into the casing 2 from the rear end, the boring part prevents interference with the pipe 4, and a passage 17 passing through the injection gun 1 is formed.

The tip of the inner cylinder 15 has a wall thickness difference caused by the boring process of the casing 2 with respect to the central axis of the inner cylinder 15, that is, according to the above-mentioned embodiment, there is a built-up process having an eccentric amount of about 5 mm. There is.

Then, the inner cylinder 15 is inserted into the casing 2 so that the amount of eccentricity applied to the casing 2 and the amount of eccentricity applied to the inner cylinder 15 cancel each other out, and the inner cylinder 15 has a predetermined diameter with the flange 16 of the inner cylinder 15 as a locking part. A compression type spring 18 is interposed.

In addition, the inner cylinder support ring 19, which has the same outer diameter as the casing 2 and a predetermined thickness, has an inner cylinder 1 that is eccentric with respect to its central axis by the same amount of eccentricity as the case of the casing 2.
A support hole 20 corresponding to the outer diameter of 5 is bored, and a cutout is provided in the support hole 20 to facilitate insertion of the inner cylinder 15.

A liquid passage 21 is formed at the side of the support hole 20 from the lower end surface of the inner cylinder support ring 19 with the direction changed outward by 90 degrees inside the inner cylinder support ring 19.
A union joint 22 is screwed on and connected to the coolant tank 8 via a pump 23.

A ring-shaped packing 24 is provided on the lower surface of the inner cylinder support ring 19 for the inlet A of the radiator.
is buried, and the inner cylinder support ring 19 is inserted into the support hole 20.
It is coupled to the casing 2 with the tip of the inner cylinder 15 inserted through the inner cylinder 15, and the spring 18 is held in place.

Further, a rubber gasket 25 is attached to the distal end side of the inner cylinder 15 and has a U-shaped cross section on one side and can be moved freely within the intake port A of the radiator.

In the above configuration, when injecting cooling water into a radiator of a completed automobile on an assembly line in an automobile manufacturing factory, a liquid injection gun for cooling water is prepared by being suspended from a hook or the like at a predetermined work position. When the liquid injection gun 1 is brought close to the supply port A of the radiator in the injection position and the gasket 25 at the tip of the inner cylinder 15 is fitted and installed, the gasket 24 provided on the lower surface of the main body of the liquid injection gun 1 will close the gas supply port A of the radiator. It is crimped to the edge of inlet A, and protects the radiator from outside air.
Also, the space included in the water jacket is sealed.

Then, air is supplied from the air tank 14 to the operating air supply port of the tap hole 11 through the operation of the pump 13, and the inner cylinder 15 is compressed and moved forward against the spring 18, toward the radiator main body. It is brought into contact with the injection port B and connected to the passage 17 by the seal of the gasket 25 to maintain a close contact state.

Therefore, the vacuum pump 10 connected via the switching valve 6 to the union joint 5 provided at the base end of the passage 17 is operated to perform a vacuum drawing action to remove the air in the radiator and water jacket via the passage 17. is carried out, and while the liquid injection gun 1 is processing the main tank for the radiator and water jacket, the pump 23
Cooling water flows from the coolant tank 8 into the union joint 22 provided on the liquid injection gun 1 through the liquid injection passage 21, and flows into the radiator's inlet A through the liquid passage 21. At this time, the inlet A of the radiator Since it is already sealed by the seal packing 24, it immediately passes through the injection port C to the sub-tank and fills the sub-tank.

After the evacuation of the water jacket described above is completed and the evacuation is confirmed by the pressure gauge 9, the electromagnetic valve 6 is switched to the coolant tank 8 side.
Then, the operation moves on to injecting cooling water into the radiator and water jacket through the passage 17.

During this time, cooling water is still flowing in from the liquid passage 21 to fill the sub-tank, and this will continue until the radiator and water jacket are filled with cooling water. This allows sufficient cooling water to be injected into the sub-tank.

Incidentally, even if the injection is insufficient, the injection into the sub-tank will continue even after the inner cylinder 15 is removed.
Therefore, when injecting cooling water into the radiator and water jacket, the time required to vacuum the tank and inject cooling water, that is, the cycle time, can be used for injecting cooling water into the reserve tank. .

When the injection of cooling water into the radiator, the main tank and the reserve tank of the water jacket is completed, and the air supply from the air supply/discharge device 13 is released, the spring 18 causes the inner cylinder 15 to inject the water into the radiator. The injection gun 1 is withdrawn from the inlet A of the radiator by retreating from the inlet B, and the cooling water injection work is completed.

Further, as shown in the embodiment shown in FIG. 3, a hole 21' is provided in the upper part of the gasket 26 at the tip of the inner cylinder 15'', and a resin pipe 22'' is connected to the inner cylinder 15'' and the inside of the pipe 4. It is also possible to connect it to one side of the two-pronged union joint 5' as appropriate by giving it some flex, and to connect it to the coolant tank as in the above embodiment to use it as a liquid passage for injection into the reserve tank. .

Further, as shown in the embodiment shown in FIG. 4, a liquid passageway is provided in which a hole 21 having an outlet is bored through the inner cylinder support ring 19' in a notched part of the inner cylinder support ring 19'. In that case, it is possible to design several liquid passages, each with a union joint at the hole opening from the outer cylinder, and connect them to one tank to increase the amount of injection into the sub-tank. Changes are possible.

It goes without saying that the embodiments of this invention are not limited to the above-mentioned embodiments. For example, even if the inlet is drum-shaped and has an inlet leading to a sub-tank in the middle, By passing through the inlet leading to the sub-tank of the packing that contacts the inner diameter of the inlet, the main tank can be evacuated, and the cooling water can be injected into the sub-tank at the same time as the cooling water is injected. can be adopted.

<Effects of the invention> As described above, according to this invention, when a given coolant is injected into two systems of tanks, each of which processes the main tank and the sub-tank, the process is basically different within the limited cycle time. When simultaneously injecting into tanks, a single injection gun can remove air and inject coolant into each tank as desired, unlike the process that used to be performed using multiple injection guns.
This has the effect of providing an excellent injection gun that has the function of injecting coolant at the same time with one injection gun.

In the automobile assembly process, etc., in the limited cycle time related to other processes, it can be processed with so-called waiting time, and many problems that conventionally had problems can be solved, and other problems can be solved. This has the excellent effect of increasing the efficiency of the entire work process without interfering with the process.

In addition, it has the effect of being freed from the complexity that conventionally occurred when two injection guns were forced to be used, and the total function that can be performed using two injection guns can now be performed by one injection gun. All of this can be achieved with a simple structure of providing a liquid path, which greatly reduces the cost increase in the process of using an injection gun and equipment investment, and has the excellent effect of improving productivity. be.

[Brief explanation of drawings]

Figures 1 to 4 are explanatory diagrams of embodiments of this invention, with Figure 1 being a partial sectional view of one embodiment, Figure 2 being a sectional view of Figure 1, and Figure 3 being a sectional view of another embodiment. FIG. 4 is a sectional view of another embodiment, and FIG. 5 is a sectional view of a conventional injection gun. 1... Injection gun, B... Main tank inlet,
C... Sub-tank inlet, A... Supply inlet, 19...
...Outer cylinder, 15...Inner cylinder, 8...Liquid tank, 9...
Vacuum pump, 6... switching valve, 17... passage,
21...Passage fluid.

Claims (1)

[Scope of utility model registration request] It has an outer cylinder whose tip is in close contact with an inlet with a plurality of coolant inlets, and an inner cylinder inside the outer cylinder. In an injection gun structure having a passage connected to a tank and a vacuum pump via a switching valve, a gasket is provided at the tip of an inner cylinder connected to the liquid tank and in close contact with one injection port, An injection gun structure characterized by having a liquid passageway connected to the outer cylinder provided in the outer cylinder.