JPS6216842Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is a tractor equipped with a diaphragm pump that sucks disinfectant from a tank and discharges it from a discharge pipe, and a roller arm that reciprocates its connecting rod.
This invention relates to a liquid volume adjustment device in a soil disinfection machine that is attached to a tiller, a management machine, etc.

(Prior art) Conventionally, in this type of soil disinfection machine, in order to adjust the amount of liquid, the connecting rod of the diaphragm is adjusted by adjusting the amount of contact of the roller with respect to the cam that swings the roller arm. The liquid volume is adjusted by changing the stroke of the roller arm, and a handle system is used to control the operating range of the roller arm.

(Problems to be solved by the invention) According to this handle system, the liquid volume is adjusted in stages, so continuous adjustment is not possible, so fine adjustment is not possible, and the handle must be operated up and down.
Since the handle is set on the adjustment plate,
The disadvantage is that it is not easy to operate and the overall cost is high.

(Means for solving the problem) This proposal aims to improve the above-mentioned points, and in order to restrict the operating range of the roller arm, an eccentric disc that can freely come into contact with the roller arm is provided, and this eccentric By rotating the disk using a dial, the amount of contact between the cam that swings the roller arm and the roller of the roller arm can be adjusted, thereby adjusting the amount of liquid.

Such a dial method is inexpensive and can be set simply by rotating the dial, making it easy to operate and allowing fine adjustment of the liquid volume.

(Example) The embodiments shown in the drawings will be described below.

First, a liquid volume adjustment device in a conventional soil disinfection machine will be explained based on Fig. 1. 1 is a hit part of a tractor, tiller, management machine, etc. A stay 3 extending upward is detachably attached.

A chemical solution tank 5 is provided on the support 15 of the machine body 4, and an injection claw 6 is further protruded downward from the machine body 4, and a disinfectant solution is attached to the injection claw 6 from a diaphragm pump 7 via a discharge pipe 8. It is designed to be discharged from a discharge pipe.

Further, the disinfectant solution is sucked into the diaphragm pump 7 from the chemical solution tank 5 through the suction pipe 9.

A drive wheel 10 is mounted on a support 15 of the body 4, and a cam 12 is provided on a shaft 11 of the drive wheel 10 so as to rotate together with the drive wheel 10.

Reference numeral 13 denotes a roller arm whose middle part is pivoted 14 to a support 15, and the roller 16 at the rear end contacts the cam 12, and the connecting rod 17 of the diaphragm pump 7 contacts the front end. I'm starting to do that.

The connecting rod 17 is mounted in a known manner on the center disk of the diaphragm, and is reciprocated by the roller arm 13, thereby sucking disinfectant from the tank 5 through the suction pipe 9 and discharging it from the discharge pipe 8. It is designed to expel this.

The roller arm 13 is driven by the cam 12, and by adjusting the amount of contact of the roller 16 with the cam 12, the swing range of the roller arm 13 is regulated and the stroke of the connecting rod 17 can be changed. It is now possible to adjust the amount of liquid.

A handle 18 is used as a device for regulating the operating range of the roller arm 13.

The tip of the handle 18 is integrally attached to the shaft 20 of a lever 19, and the tip of the lever 19 can freely come into contact with the roller arm 13.

Further, the shaft 20 of the lever 19 is mounted on the support 15, and a spring 21 is stretched between the support 15 and the handle 18.

The handle 18 is also engageable in a locking groove 23 of an adjustment plate 22 attached to the support 15. Therefore, if the handle 18 is rotated about the shaft 20, the roller arm 1 of the lever 19
The contact position of the roller 16 against the cam 12 changes, and the amount of contact between the roller 16 and the cam 12 is adjusted.

When the handle 18 is released at the adjusted position, the spring 21 pulls the handle 18 into the locking groove 23 and locks it.

In the above-mentioned liquid volume adjustment using the handle method, the liquid volume adjustment is limited by the number of lock grooves 23, and currently it can only be adjusted in stages, and continuous adjustment is not possible. Since the handle 18 is set by engaging the locking groove 23 of the adjustment plate 22,
The handle operation is complicated and the overall mechanism is complicated, which increases costs.

Therefore, for this proposal, improvements were made as shown in Figure 2.

That is, in order to regulate the operating range of the roller arm 13, an eccentric disk 24 that can freely come into contact with the roller arm 13 is rotatably provided on the support 15 of the fuselage 4, and its rotational position can be freely set. It is.

That is, as shown in FIG. 3, the dial shaft 25 is fitted into the support 15 of the body 4,
A spring 27 is interposed between the support 15 and a nut 26 screwed onto the tip of the dial shaft 2.
A serrated non-slip 28 on the end face of the eccentric disc 24 fitted to the support 15 can freely engage with a serrated non-slip 29 on the support 15 side. A rotating scale disk 32 that also serves as a dial is fitted onto the dial shaft 25.

For setting the scale of the scale disc 32, there is a baseline scale 30 on the support 15. Note that 31 is a bolt head of the dial shaft 25. Therefore, the eccentric disk 24 can be rotated using the dial 32, and the rotation position can be set by aligning the base line scale 30 with the dial scale, and the set position Serrated anti-slip 2
When 8 and 29 are engaged, the dial 32 is locked in that position, and when the dial 32 is pulled against the force of the spring 27, the anti-slips 28 and 29 are disengaged, allowing the eccentric disk 24 to rotate freely. By rotating the eccentric disc 24, the contact position of the eccentric disc 24 with respect to the roller arm 13 changes, and the operating range of the roller arm 13 can be restricted. Note that the one shown in FIG. 5 differs from the one shown in FIG.
In contrast, a concentric anti-slip portion 28 is attached to the dial shaft 25.

(Effects of the invention) With the above-mentioned configuration, the present invention rotates an eccentric disc with a scale disc that also serves as a dial to regulate the operating range of the roller arm, thereby adjusting the amount of contact between the roller and the cam. At the same time, the adjustment position is stopped and maintained by providing a sawtooth-like non-slip between the support side and the end face of the eccentric disk, so that the sterilizer can be moved, that is, rotated with the drive wheel. The contact between the cam, the roller arm oscillated by the roller in contact with the cam, and the eccentric disc ensures that the adjustment position will never loosen even when contact vibrations due to the fast rotation of the drive wheel are transmitted. can be held.

This, together with the ease of continuous minute adjustment of the chemical solution, is necessary in a device that vibrates frequently, such as a soil disinfection machine, in order to maintain a constant supply of the chemical solution.

[Brief explanation of the drawing]

FIG. 1 is a side view of a conventional sterilizer, FIG. 2 is a side view of the sterilizer of the present invention, and FIGS. 3 and 4 are a side view and an exploded perspective view of the main parts of the sterilizer of the present invention. FIG. 5 is a side view similar to FIG. 3 showing a modified embodiment. 7...Diaphragm pump, 12...Cam, 1
3...Roller arm, 16...Roller, 17...
Connecting rod, 24... Eccentric disc, 25... Dial shaft, 28, 29... Serrated anti-slip, 32...
A scale plate that doubles as a dial.

Claims (1)

[Scope of utility model registration request] It is equipped with a diaphragm pump that sucks disinfectant from a tank and discharges it from a discharge pipe, and a roller arm that reciprocates the connecting rod that operates the diaphragm pump, and a scale circle that also serves as a dial that can freely come into contact with this roller arm. A liquid volume adjustment device for a soil disinfection machine, in which an eccentric disk with a plate is rotatably provided on a support on the machine body side, and a serrated non-slip is provided between the support side and the end face of the eccentric disk.