JPS6326206Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a safety valve reflexor in a power sprayer.

(b) Prior Art The technology of providing a safety valve reflex lever in a power sprayer has been known to the public.

For example, see Utility Model Publication No. 40-6371.

(c) Problems that the invention aims to solve A power sprayer generates pressure by rotating a crankshaft and reciprocating a plunger within a cylinder, and uses this pressure to spray water or spray chemicals.

However, if more pressure than necessary is applied, a safety valve is activated to discharge the excess pressure and is equipped with a safety device to maintain a constant pressure.

Furthermore, a safety valve refever is installed to lower the pressure inside the pressure tank and forcibly release the remaining liquid when abnormal pressure occurs, after work is completed, or if you wish to continue spraying another chemical solution. .

Conventional safety valve reflex levers can only be rotated in one direction to release pressure, so be careful when releasing or applying pressure.
The structure was dangerous because if the operator did not operate it, his hands would come into contact with the drive pulley and surrounding obstacles.

In this invention, the pressurizing position is set in the center, and the pressure releasing position is set in two directions, left and right.With this setting, when the drive pulley is installed on the right side, the safety valve reflex lever can be rotated to the left. It can be rotated to the right by attaching a drive pulley to the left side.

In this way, pressure can be released safely without contacting the drive pulley, and even when pressurizing, it can be operated safely without contacting the drive pulley or surrounding obstacles.

(d) Means for solving the problem The purpose of the present invention is as described above. Next, the configuration for achieving the purpose will be explained.

The safety valve reflex lever 4, which pushes back the spring 24 of the safety valve which has biased the valve 21 in the closing direction by the spring 24, can be rotated left and right between drive pulleys 1, 1 which can be attached to the left and right sides of the case 2. , the safety valve is provided with an engaging part 19 that engages with the cam parts 4b, 4a, 4b of the safety valve reflex lever 4, and the safety valve reflex lever 4 is connected to the drive pulley 1.
The engaging portion 19 engages with the non-released cam portion 4a at a position substantially parallel to the cam portion 4a, and the released cam portions 4b, 4 rotate left and right from this position by approximately the same angle.
This is the one provided in b.

(E) Embodiment The purpose and structure of the present invention are as described above. Next, the structure of the embodiment shown in the attached drawings will be explained.

Figure 1 is a plan view of the power sprayer of the present invention, Figure 2 is a plan view of a conventional power sprayer, Figure 3 is a side sectional view of the power sprayer, and Figure 4 is a side sectional view of the safety valve. be.

Power generated by the engine or motor is transmitted to the drive pulley 1 via the belt. The crankshaft 9 supported by bearings on the case 2 uses the power obtained from the drive pulley 1 to drive the plunger base 12 and the plunger 11 via the connecting rod 10.
make a reciprocating motion.

The plunger base 12 and the plunger 11
are connected by a connecting bolt 13, and the plunger 11
A V-packet is inserted between the cylinder 14 and the cylinder 14,
It has a sealing effect.

Due to the reciprocating movement of the plunger 11 and the backflow prevention action of the water intake valve 18, liquid flows from the water intake port 6R or 6L and is sent to the pressure tank 20. The pressure inside the pressure tank 20 is displayed on a pressure gauge 8, and by rotating the pressure adjustment lever 3, the pressure is adjusted according to the work.

When the pressure inside the pressure tank 20 reaches a constant pressure,
Chemical liquid etc. are fed under pressure from the pressure valve 16, and the discharge port 7R,
It is discharged from 7L. 17R and 17L are valve handles.

As shown in FIG. 4, the safety valve part consists of a valve body made up of a ball valve 21 and a pushing body 22, and when the pressure in the pressure tank 20 becomes excessive, the ball valve 21
is pushed upward, and the surplus is discharged from the surplus port 5. Usually, the surplus port is connected with a hose so that it can be returned to a chemical tank or the like.

The pushing body 22 is fixed to a lower spring receiver 23 and pushes down the ball valve 21 by the pressure of a spring 24.

The spring 24 is supported by an upper spring receiver 26 and a lower spring receiver 23, and the pressure of the safety valve is adjusted by rotating the pressure adjustment lever 3. 25 is a fixing screw.

Since the upper diameter of the pushing body 22 is smaller than the diameter of the valve port 29 at the bottom of the ball valve 21, the pressure obtained from the back chamber 27 via the bypass passage 28 is smaller than the pressure at the valve port 29, 27 is added to the spring pressure on the upper part of the pushing body 22, and the pressure of the safety valve can be adjusted by simply applying a small pressure.

If you want to forcefully lower the pressure, rotate the safety valve reflex lever 4. When the safety valve reflex lever 4 is rotated, the engaging part 19 fitted into the lower spring receiver 23 is raised from the cam part 4a of the safety valve reflex lever 4 to the cam part 4b. Therefore, the lower spring receiver 23 and the pushing body 22 are lifted, and the ball valve 21 is not subjected to spring pressure.
The liquid flows out to the surplus port.

A conventional safety valve reflex lever consists of a handle part A and a cam part B as shown in Figures 5 and 6, and the shape of the cam is such that the pin stops at the cam parts 4a and 4b as shown in the developed view in Figure 7. There was only one set of a releasing part and a non-releasing part. Then,
As shown in Figure 2, pressure could only be released in one direction.

In this invention, as shown in Figures 8, 9, and 10, the pressure position is set at a position where the handle is almost parallel to the drive pulley, and the pressure release position is rotated at approximately the same angle to the right and left. The cam parts 4a and 4b are set so that
The cam parts 4b, 4 are arranged so that the release directions are in two directions.
a and 4b were formed.

(f) Effects of the invention Since the invention is constructed as described above, it has the following effects.

First, the cam portions 4b, 4a, and 4b are configured so that the safety valve reflex lever 4 is placed in the non-released position at the center of the left and right sides on the case 2, and the cam portions 4b, 4a, and 4b are placed in the non-released state by rotating left and right from there. , when the drive pulley 1 is replaced in the left and right positions of the case 2 due to engine reasons, the safety valve reflex lever 4
By rotating the drive pulley 1 in the direction away from the drive pulley 1, the pressure can be released safely.

Second, by rotating the safety valve reflever to the right or left to prevent it from hitting the drive pulley or surrounding obstacles, it is possible to release pressure. This allows for a greater degree of freedom when arranging machines.

[Brief explanation of the drawing]

Figure 1 is a plan view of the power sprayer of the present invention, Figure 2
The figure is a plan view of a conventional power sprayer, Figure 3 is a side sectional view of the power sprayer, Figure 4 is a side sectional view of the safety valve section, Figure 5 is a plan view of a conventional safety valve reflex lever, and Figure 6 is a side sectional view of the power sprayer. Similarly, FIG. 7 is a developed view of the safety valve reflexer cam portion, FIG. 8 is a plan view of the safety valve reflexer of the present invention, FIG. 9 is a side view thereof, and FIG. 10 is a developed view of the safety valve reflexer cam portion. 1... Drive pulley, 2... Case, 4... Safety valve reflex lever, 4a, 4b... Cam part, 9...
Crankshaft, 19...engaging part.

Claims (1)

[Scope of utility model registration request] The safety valve reflex lever 4, which pushes back the spring 24 of the safety valve which has biased the valve 21 in the closing direction by the spring 24, can be rotated left and right between drive pulleys 1, 1 which can be attached to the left and right sides of the case 2. , the safety valve is provided with an engaging part 19 that engages with the cam parts 4b, 4a, 4b of the safety valve reflex lever 4, and the safety valve reflex lever 4 is connected to the drive pulley 1.
The engaging portion 19 engages with the non-released cam portion 4a at a position substantially parallel to the cam portion 4a, and the released cam portions 4b, 4 rotate left and right from this position by approximately the same angle.
A safety valve reflex lever for a power sprayer, characterized in that it is provided with b.