JPH0350301Y2 - - Google Patents

Description

[Detailed explanation of the idea] "Industrial application field" This proposal concerns a manual pump.

``Prior Art'' As a manual pump of this kind, a piston is slidably fitted into a vertical cylinder, a stem is linked to the piston, the upper end of the stem projects above the cylinder, and the lower end is connected to the cylinder. A head with a discharge port is provided at the upper end of the stem to communicate with the inner pressurizing chamber, a suction valve is provided at the lower end of the cylinder, and a discharge valve is provided within the stem, and the piston is pushed up into the cylinder. It is known to have a spring installed inside.

"Problem to be Solved by the Invention" The conventional manual pump described above does not have a discharge rate adjustment function, and the discharge rate is controlled solely by manual operation. Therefore, excessive output often occurs, and improvements are desired.

This proposal responds to such requests.

"Means for Solving the Problem" A piston 2 is slidably fitted into a vertical cylinder 1, a stem 3 is linked to the piston, the upper end of the stem projects upward from the cylinder, and the lower end A head 4 having a discharge port 41 is provided at the upper end of the stem, and a suction valve 5 is disposed at the lower end of the cylinder 1, and a discharge valve 6 is disposed within the stem 3. In this manual pump, a screw hole 21 is formed in the piston 2, and a male thread 31 is formed on the outer periphery of the stem 3, and the male thread is connected to the piston 2. It was screwed into the screw hole 21.

``Function'' It has the above structure and is used by screwing the screw tube 13 onto the mouth of the bottle A containing liquid, but when the head 4 is rotated to the right or left, the stem 3 also rotates. On the other hand, the piston 2 is prevented from rotating by the spring 7 for pushing up the piston, which is elastically repelled upward, and the frictional resistance with the inner surface of the cylinder 1 helps prevent the rotation. is screwed in to the lower limit (Fig. 1) or screwed out to the upper limit (Fig. 2) due to screw engagement with the piston 2.
is obtained. Thereby, the stroke of the piston 2 can be changed arbitrarily from zero in FIG. 1 to the maximum in FIG. 2.

When the head 4 and the piston 2 are pushed down against the spring 7 and then released to return to their original position by the spring 7, the suction valve 5 and the discharge valve 6 act to generate a pumping action, causing the inside of the bottle A to flow. The liquid is sucked up through the suction pipe B and discharged from the discharge port 41.
It is ejected from.

"Example" In the figure, 1 is a vertical cylinder having a suction port 18 at the lower end, 2 is a piston slidably fitted into the cylinder, 3 is threadedly engaged with the piston, and the upper end is A stem 4 that protrudes upward from the cylinder and has a lower end communicating with the in-cylinder pressurizing chamber 11 is fitted into the upper end of the stem and has a discharge port 4 communicating with the stem.
1 is a head, 5 is a suction valve installed at the lower end of the cylinder 1, 6 is a discharge valve installed at the upper part of the stem 3, and 7 is a piston-pushing spring installed inside the cylinder 1.

The cylinder 1 is provided with a flange 12 on the outer periphery of the upper part, a threaded cylinder 13 that is screwed into the mouth of the bottle A is rotatably attached to the outside of the flange, and a packing 14 is attached to the lower surface of the flange. to piston 2
A receiving tube 15 is fitted and fixed to prevent the rod from coming off, and a small ventilation hole 16 is bored slightly below the flange, and the rod 1 enters into the stem 3 that has descended into the pressurizing chamber 11.
7 stands upright, and a suction port 18 of a small cylinder into which a suction pipe B is fitted and hangs down is provided vertically at the lower end.

The piston 2 is provided so as to close the ventilation hole 16 at the upper limit that abuts against the receiving cylinder 15, and is provided with a threaded cylinder 22 forming a screw hole 21 in the center.

The stem 3 is formed into an inner cylinder with a smaller diameter than the screw tube 22, and has a male thread 31 on its outer periphery that screws into the screw hole 21, a stopper 32 with a slightly larger diameter at the lower end, and a slightly larger diameter at the upper end. The head fitting part 33 is formed with a small diameter, and a vertical groove 3 is formed on the outer surface of the fitting part.
There are 4.

The head 4 has a discharge port 4 projecting in the shape of a square shape on the front surface.
1, a fitting tube 42 is vertically provided on the lower surface, the fitting tube is fitted onto the outer periphery of the fitting portion 33 at the upper end of the stem, and a vertical groove that fits into the vertical groove 34 is provided on the inner surface of the fitting tube. Projection 43
is installed protrudingly.

The suction valve 5 has a tapered valve seat 51 inside the suction port 18 at the lower end of the cylinder 1, and a ball valve 52 on the valve seat.
is movably seated, and the ball valve comes out from the rod body 1.
It is stopped at the lower end of 7.

The discharge valve 6 is provided with a tapered valve seat 61 inside the fitting part 33 at the upper end of the stem 3, a ball valve 62 is movably seated on the valve seat, and a receiving rod 63 hanging from the head 4 prevents the ball valve from coming out. Stop and become.

Incidentally, it is preferable to provide an uneven rotation prevention means on the fitting between the upper end of the cylinder 1 and the receiving tube 15, and on the abutting surface between the receiving tube and the piston 2. It is preferable that the rod 17 inside the cylinder 1 has a protruding leg, the leg is fitted into the lower part of the cylinder, and the leg is pressed by the lower end of the spring 7.

``Effect of the invention'' According to the present invention, by rotating the head 4 to the left or right, the stroke of the piston 2 can be changed depending on the direction and amount of rotation, and the discharge amount can be changed arbitrarily. , a discharge amount adjustment function can be provided, the required discharge amount can be reliably obtained without adjusting the operation, and wasteful discharge due to excessive discharge can be avoided.

Further, a piston 2 is slidably fitted into the vertical cylinder 1, a stem 3 is linked to the piston, and the upper end of the stem projects upward from the cylinder, and the lower end is connected to the pressure chamber 11 in the cylinder. A head 4 having a discharge port 41 is provided at the upper end of the stem to communicate with the stem, a suction valve 5 is provided at the lower end of the cylinder 1, a discharge valve 6 is provided within the stem 3, and a piston is provided within the cylinder 1. In a manual pump equipped with a push-up spring 7, a screw hole 21 is formed in the piston 2, and a male screw 31 is formed on the outer periphery of the stem 3, and the screw is inserted into the piston 2.
The stroke of the piston 2 can be changed by screwing the stem 3 into the screw hole 21 of the pump, and by screwing the stem 3 up or down. For example, since the stroke of the piston can be changed by using a special component to adjust the stroke of the piston, the discharge amount can be adjusted using a special component for adjusting the stroke of the piston, that is, an extra component that the manual pump does not inherently have due to its structure. It is possible to easily and inexpensively manufacture a manual pump with a discharge rate adjustment function without increasing the number of parts and complicating the structure as in the case of the present invention.

Furthermore, reduce the stroke of piston 2 to zero (Fig. 1)
If you do this, you can do it without discharging, and you can also
can be lowered to the lower limit, which is extremely convenient for handling during the product distribution process.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIGS. 1 and 2 are cutaway side views of the stem in a screwed-in state and a screwed-out state, respectively. 1... Cylinder, 2... Piston, 3... Stem, 4... Head, 5... Suction valve, 6... Discharge valve, 7... Spring.

Claims (1)

[Scope of utility model registration request] A piston 2 is slidably fitted into a vertical cylinder 1, a stem 3 is linked to the piston, the upper end of the stem projects upwardly of the cylinder, and the lower end communicates with a pressurizing chamber 11 inside the cylinder. A head 4 having a discharge port 41 is provided at the upper end of the stem to communicate with the stem, a suction valve 5 is provided at the lower end of the cylinder 1, a discharge valve 6 is provided within the stem 3, and a piston is pushed up into the cylinder 1. In the manual pump equipped with a spring 7, a screw hole 21 is formed in the piston 2, a male screw 31 is formed on the outer periphery of the stem 3, and the male screw is screwed into the screw hole 21 of the piston 2. A manual pump featuring: