JPH0227959Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a hand spray gun device used to spray a mold release agent onto the inner surface of a die-casting mold or a forging mold.

(Prior technology) When spraying a mold release agent onto the inner surface of a die-casting mold or forging mold, there are some parts that cannot be mechanized or automated depending on the shape, so this is done using a hand spray gun device. There is.

In conventional hand spray gun devices, valves for adjusting the spray of pressurized air and mold release agent, respectively, and levers for opening and closing the valves are provided in the hand spray gun body (for example, the
59-55364).

The operator operates the lever with the hand holding the hand spray gun body to adjust the spraying of pressurized air and mold release agent.

(Problems to be solved by the invention) With the above conventional configuration, it is necessary to adjust the spray by pulling a lever with your fingers while holding the hand spray gun body in your hand, which makes it difficult to use the gun for long periods of time, and due to the shape of the mold. This poses a problem in that the operator becomes extremely fatigued when the system is complex and requires repeated lever operations. In particular, the recoil caused by the air pressure is transmitted to the wrists of workers, causing severe wrist fatigue and causing many injuries. Therefore, measures for health management are desired.

For example, if you work 7 hours/day at a work site,
About 1000 shots, 3 to 1 shot per shot
On average, you pull the lever 5 times. This data also shows how heavy the burden is on workers' wrists.

The present invention attempts to solve the above problems.

(Means for solving the problem) In a hand spray gun device for die-casting and forging molds in which the hand spray gun body is connected to an air/liquid supply device, the hand spray gun body and the air/liquid supply device are
This foot valve type hand spray gun device for die casting and forging molds is characterized in that a foot valve is provided between the spray gun body and the liquid supply device, and the foot valve adjusts the jetting of air and liquid from the spray gun body.

(Operation) A mixture of a mold release agent and pressurized air is sprayed onto a die-casting mold or a forging mold from an air/liquid supply device through a hand spray gun body. At that time, a foot valve provided between the hand spray gun body and the air/liquid supply device is operated with the foot, and the foot valve adjusts the jetting of air/liquid from the spray gun body.

Therefore, the operator only has to hold the hand spray gun body, and the fatigue of the operator's wrists is significantly reduced. By this,
This solves the above-mentioned problem of severe worker fatigue during long-term use or when the shape of the mold is complex and lever operations must be repeated.

(Example) In FIG. 1, the hand spray gun body 11
is provided with a nozzle 12, which is used toward a die-casting mold or a forging mold (not shown). Connectors 13 and 14 are provided at the rear end of the nozzle 12, and a liquid volume adjustment valve control knob 1 is provided at the middle part of the hand spray gun body 11.
5 is provided. Liquid volume adjustment valve control knob 15
The mixing ratio of the mold release agent and pressurized air can be adjusted by an operator's operation.

One ends of long and flexible pipes 16 and 17 are connected to the connectors 13 and 14. The other ends of the pipes 16 and 17 are connected to a foot valve 18 (arrow F
A pair of connectors 19 that are screwed in (direction is forward)
(only one is shown).

Housing block 20 of foot valve 18
The fixing bolt 2 is attached to the fixing base 21 located below.
It is fixed by 2. A generally cylindrical valve chamber 23 is formed within the housing block 20 and opens downward. The lower end of the valve chamber 23 is closed by a cap 25 screwed from below through a hole 24 formed in the fixing base 21.

A concentric, small-diameter hole 26 is opened at the upper end of the valve chamber 23, and the upper end of the hole 26 opens outward from the upper end surface of the housing block 20. A valve rod 27 extending vertically is slidably fitted into the hole 26, and a seal ring 28 provided at the top of the hole 26 maintains liquid tightness between the hole 26 and the valve rod 27 to the outside. keeping.

The valve rod 27 has a small diameter portion 2 in the middle part in the vertical direction.
9, and has a valve body 30 having a larger diameter than the hole 26 at the lower end. In the state shown in FIG. 1, the upper end surface of the valve body 30 has the valve chamber 23 and the hole 26.
It is seated on a valve seat 31 formed between the valve chamber 23 and the hole 26, and closes the space between the valve chamber 23 and the hole 26. A concentric protrusion is integrally formed on the lower end surface of the valve body 30, and a coil spring 32, one end of which fits into the protrusion, is compressed concentrically between the cap 25 and the valve body 30. Then, valve body 3
0 is always elastically biased upward.

A passage 33 communicating with the connector 19 is opened in a portion of the hole 26 corresponding to the small diameter portion 29 .
Further, one end of a horizontally extending passage 34 is open in the vertically intermediate portion of the valve chamber 23, and the other end of the passage 34 communicates with a connector 35 screwed onto the housing block 20. A pressurized mold release agent or pressurized air is supplied to the connector 35 from a gas/liquid supply device 37 via a pipe 36.

Although only one side is shown, the connector 19, the valve chamber 23, the hole 24, the cap 25,
hole 26, valve rod 27, seal ring 28,
Coil springs 32, passages 33, passages 34, connectors 35, and pipes 36 are provided in pairs for mold release agents and pressurized air.
Further, each pair is arranged in parallel with an interval in a direction perpendicular to the plane of the paper of FIG. However, the amount of upward protrusion of the valve rod 27 from the housing block 20 is as shown in FIG.
Valve rod 27a should be larger than 7b.
is set longer.

A bracket 40 is integrally formed at the upper end of the housing block 20 on the connector 19 side in FIG. freely supported. The rear portion of the actuation pedal 42 extends rearward slightly above the housing block 20, and the portion rearward of the curved portion formed in the middle thereof protrudes further rearward than the housing block 20. In the valve closed state shown in FIG. 1, a small gap is formed between the upper ends of the pair of valve rods 27 and the lower surface of the operating pedal 42, as shown in FIG.

A recess 43 is formed in the upper part of the housing block 20 in FIG. 1 at a portion rearward of the valve rod 27. As shown in Figure 3,
A cam pawl 44 is arranged within the recess 43 . The base of the cam pawl 44 is rotatably connected to the housing block 20 via a support shaft 45 extending perpendicular to the plane of the drawing. A torsion spring 46 is compressed between the cam pawl 44 and the recess 43, so that the cam pawl 44 is always elastically biased in the direction of arrow A. Further, a protrusion 47 that protrudes rearward is integrally formed at the base of the cam pawl 44, and in the illustrated state, the lower end of the protrusion 47 comes into contact with the upper end surface of the housing block 20, so that the cam pawl 44 is held in the position shown.

As shown in FIG. 1, an intermediate portion of a return pedal 51 is rotatably supported by the housing block 20 below the cam pawl 44 via a support shaft 50 perpendicular to the plane of the drawing. The rear end of the return pedal 51 is arranged so that the front side of the operating pedal 42 in the drawing is spaced apart from the operating pedal 42 by a small distance.
It extends rearward along 2. Return pedal 51
The front end of the projection 47 is in contact with the rear lower surface of the projection 47, as shown in FIG.

A pawl 52 that protrudes toward the cam pawl 44 is integrally formed in the middle portion of the operating pedal 42 . Further, two locking portions 53 and 54 are arranged on the upper rear surface of the cam pawl 44 at a position where the pawl 52 can be locked, and are generally spaced apart from each other in the vertical direction.

Next, the operation will be explained. In the illustrated state, the actuation pedal 42 is not pushing the valve rods 27a and 27b together, the valve body 30 in FIG. do not have.

After holding the hand spray gun main body 11 in the hand and directing the nozzle 12 to the required position on the mold, the operating pedal 42 is depressed with the foot. As a result, the valve rod 27a shown in FIG. 2 is first pushed downward, and the valve body 30 for pressurized air shown in FIG. At this time, the pawl 52 in FIG. 3 is locked to the upper locking portion 53, so even if the foot is subsequently removed from the operating pedal 42, the pressurized air continues to be ejected.

When the actuation pedal 42 is further depressed, the actuation pedal 4
2 can push down not only the pressurized air valve rod 27a shown in FIG. 2 but also the mold release agent valve rod 27b. As a result, both the pressurized air valve body 30 and the mold release agent valve body 30 shown in FIG. 1 open, and a mixture of pressurized air and mold release agent is ejected from the nozzle 12. The mixing ratio can be arbitrarily set by adjusting the liquid volume adjustment valve control knob 15 shown in FIG. At this time, the pawl 52 in FIG. 3 is locked to the lower locking portion 54, so even if the foot is subsequently removed from the operating pedal 42, the mixture will continue to be ejected.

To stop the ejection, the return pedal 51 is depressed. By this depression, the front end of the return pedal 51 pushes the protrusion 47 upward, so the cam pawl 44 in FIG. 3 rotates in the opposite direction A against the torsion spring 46.
The claw 52 is unlocked. As a result, the valve rod 27 shown in FIG. 1 resists the load of the actuating pedal 42 and is moved upward by the coil spring 32 to close the valve.

Of course, even if only pressurized air is being spouted, if the return pedal 51 is depressed, the pawl 52 is released from the locking portion 53 shown in FIG. 3, and the jetting stops.

(Effect of the invention) In the hand spray gun device for die casting and forging molds in which the hand spray gun body 11 is connected to the gas/liquid supply device 37, a foot valve 18 is provided between the hand spray gun body 11 and the gas/liquid supply device 37. Since the spray gun body 11 is provided with a foot valve 18 to adjust the ejection of gas and liquid from the spray gun body 11, the following effects can be expected.

(a) The operator only has to hold the hand spray gun body 11, and the fatigue of the operator's wrists is significantly reduced.

(b) The problem of severe worker fatigue can be resolved, and work efficiency can be improved, especially when the mold is used for a long time or when the mold has a complicated shape and requires repeated lever operations.

[Brief explanation of the drawing]

Fig. 1 is a schematic partial vertical cross-sectional side view of a foot valve type hand spray gun device for die-casting and forging molds according to the present invention, Fig. 2 is a partial vertical cross-sectional view of Fig. 1, and Fig. 3 is a vertical cross-sectional side view of the cam claw portion. It is. 11...hand spray gun body, 18...foot valve, 37...air/liquid supply device.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a hand spray gun device for die-casting and forging molds in which the hand spray gun body is connected to the gas/liquid supply device, there is A foot-valve type hand spray gun device for die-casting and forging molds, characterized in that a foot valve is provided and the foot valve adjusts the jetting of air and liquid from the spray gun body. (2) A foot valve type hand spray gun device for die casting and forging molds, in which the foot valve has a foot lever that opens and closes the valve, and a hook mechanism that releasably holds the foot lever in a gas-conducting position and a gas/liquid-conducting position, respectively. .