JPS6121658Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a pendant valve that moves an inverted conical valve up and down by vertical movement of a lever to adjust air pressure and air volume, and has a stopper part that allows the lower limit of the lever to be finely adjusted with one touch. Regarding pendant valves for air motor operation.

Conventionally, many pendant valves for operating air motors have been used to adjust the amount and pressure of air passing through by moving an inverted conical valve up and down and adjusting the opening of the valve. In this case, the inverted conical valve is raised and lowered by moving a lever up and down, and in order to appropriately adjust the air pressure and air volume, one must rely on the sensation of the hand, making delicate adjustments difficult. . However, when using an air motor for a lifting device, delicate adjustments must be made depending on the level of the load to be lifted or lowered. This can cause damage to the load, and requires great care.

The object of the present invention is to solve the above-mentioned problems and provide a pendant valve which allows the lower limit of the lever to be set finely with one touch by providing a stopper part, and which allows the air motor to be easily operated.

The gist of the present invention is to provide a pendant valve for air motor operation in which air pressure is adjusted by moving an inverted conical valve up and down by vertical operation of a lever. It is biased by a spring, and the structure of the stopper consists of a guide tube having a guide hole in a direction perpendicular to the pivot shaft, and a screw rod that is screwed into the guide hole, and the top of the screw rod is at least closer to the lower limit of the lever. This pendant valve for operating an air motor is characterized by being movable in the upper position.

Embodiments of the present invention will be described with reference to the drawings. 1st
The figure is a partially cutaway front view of an embodiment of the present invention, FIG. 2 is a partially cutaway plan view of the same, and FIG. 3 is a left side view of the same.

Above the pendant valve body 1 are levers 2 and 3.
is pivoted by a lever pin 4, and rods 9, 10 having inverted conical valves 7, 8 at the bottom are slidably fitted into through holes 5, 6 below the levers 2, 2,
The rods 9, 10 are biased by springs 11, 12 and are in pressure contact with the levers 2, 3. Further, a stopper part 14 is pivotally attached to a shaft 15 near the bottom of the handle 13 of the lever 2 of the valve switch body 1, and the shaft 15 is fitted into a sleeve hole 16, and the stopper part 14 is fixed to one end side. A spring seat 17 is fixed to the other end thereof, and a down control spring 18 whose one end is fixed to the main body 1 is provided to urge the rotation of the stopper portion 14. Further, the structure of the stopper portion 14 includes a guide hole 19 provided in a direction perpendicular to the shaft 15, and the guide hole 19 is threaded. Further, a screw rod 20 is screwed into the guide hole 19. Further, a down control lever 21 is provided protruding from the stopper portion.

In addition, 22 and 23 in the figure are O-rings, 24 and 25
2 is a valve cap, 26 is a locking piece, 27 is an air intake port, and 28 and 29 are air outlet ports.

In the embodiment of the present invention, a stopper part is provided only under the lever 2, but this is intended for a lifting device using an air motor, and the lever 2 is set for lowering, in particular, to prevent sudden lowering. It is something to do. Therefore, the present invention is not limited to providing a stopper section under only one lever, but may also provide a stopper section under either lever.

Since the embodiment of the present invention has the above-described structure, the lower limit of the lever 2 can be adjusted by simply moving the screw rod 20 up and down in the direction of the central axis of the guide hole 19, and the down control lever 21 can be pushed downward. By pressing the button, the stopper portion 14 can be rotated with one touch, and the stopper mechanism can be released. In addition, since the stopper portion 14 is biased by the down control spring 18,
Simply by releasing the finger from the depressed state of the down control lever 21, the stopper portion returns to its original position. In addition, by setting the top of the screw rod 20 to be within the range of the upper and lower limits of the vertical movement of the lever 2, the lower limit of the movable position of the lever 2 can be finely adjusted, and the top of the screw rod 20 can be moved to the upper limit. If this happens, lever 2 will become immobile and will also serve as a safety device.

Since the present invention has the above-described structure and the above-described function, the lower limit of the lever can be finely adjusted by vertically moving the screw of the stopper part, and the flow rate of the air passing through can be adjusted by adjusting the opening degree of the valve. Since the pressure can be controlled, when an air motor is used in an elevator, especially when lowering a load, when there is a risk of rapid descent due to the addition of the descending speed due to the load's own weight to the motor's rotational force, the motor's rotation can be regulated to ensure safety. In addition to being able to maintain the descending speed, the stopper part is rotatable, so if high-speed, no-load descent is required, the lower limit of the lever can be released with a single touch to obtain the maximum force. The operation becomes very easy.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view of the lever of the present invention, FIG. 2 is a partially cutaway plan view of the same embodiment, and FIG. 3 is a left side view of the same embodiment. 1: Pendant valve body, 2, 3: Lever,
7, 8: Reverse conical valve, 14: Stopper part, 18:
Down control spring, 19: guide hole, 20: screw rod.

Claims (1)

[Scope of utility model registration request] In a pendant valve for air motor operation, in which air pressure is adjusted by moving an inverted conical valve up and down by the up and down operation of a lever, a stopper part is rotatably provided on the side of the pendant valve body with a pivot, and is biased by a spring. The structure of the stopper consists of a guide tube having a guide hole in a direction perpendicular to the pivot shaft, and a screw rod screwed into the guide hole, and the top of the screw rod is movable at least at a position above the lower limit of the lever. A pendant valve for operating an air motor.