JPS6212545Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a shot cut valve.

Conventionally, when it was necessary to change the amount of shot grains projected in two stages depending on the target object, two types of cut valves had to be installed below the shot storage tank, one for large flow and one for small flow. However, there were problems such as increased equipment costs and complicated piping.

The present invention aims to solve these problems.

The configuration of the present invention will be explained below based on examples. Reference numeral 1 denotes a cover member, and an upper opening 2 and a lower opening 2a are perforated through the upper and lower wall surfaces of the cover member 1 on the same line at the upper and lower sides. The cover member 1
On the lower surface of the upper wall, a cylindrical chute 3 having a pin hole 3a bored through the opposite side wall surface is attached concentrically with the upper opening 2 of the cover member 1 via a flange portion 3b. The lower opening of the chute 3 is formed in a concentric circular shape with the pin hole 3a. Further, a shot storage tank 4 is attached to the upper surface of the upper wall of the cover member 1, with its supply port aligned with the upper opening 2 and the opening of the chute 3. Reference numeral 5 denotes a gate having a sector-shaped front cross-sectional view in FIG. and a pair of fan-shaped side walls 5a, 5 formed on a curved surface having a slightly larger radius of curvature than the curved surface.
a, and a curved wall part 5b installed between the tips of the side wall parts 5a and 5a and provided along the curved surface. Reference numeral 6 denotes a support shaft that is fitted into the pin hole 3a and has both ends protruding to both sides of the side walls 5a, 5a;
The center position of the radius of curvature of the side wall portions 5a, 5a of the gate 5 is fitted and supported by both ends of the support shaft 6 that protrude on both sides of the side wall portions 5a, 5a. 7 is a two-stage cylinder consisting of a first cylinder 8 and a second cylinder 9, which is rotatably supported by a frame (not shown), and a piston rod 8a of the first cylinder 8 extends into the cover member 1 from the notch 1a.
The side walls 5a, 5a of the gate 5 are rotatably connected to the tip via a rod member 10 and a pin 11, and the tip of the piston rod 9a of the second cylinder 9 is connected to the piston rod in the first cylinder 8. 8
The threaded rear end of the piston rod 9a is slidably protruded into the first cylinder 8 so as to be able to come into contact with the rear end of the piston rod 9a, and the piston rod 9a is slidably protruded rearward from the rear cover of the second cylinder 9. An adjustment nut 12 is screwed into the rear cover of the second cylinder 9 so that it can move forward and backward, and a U-shaped support member 13 is attached to the rear cover of the second cylinder 9. A bolt 14 is screwed together with the piston rod 9a on the same axis so as to be movable inwardly. Therefore, when a large amount of injection is required, the first cylinder 8 is operated with the piston rod 9a of the second cylinder 9 retracted to the stroke end, and when a small amount of injection is required, the piston rod 9a of the second cylinder 9 is moved back to the stroke end. If the condition is good, compressed air is supplied from the head side of the second cylinder 9, the piston rod 9a is protruded into the first cylinder 8, and the stroke of the first cylinder 8 is regulated, and the first cylinder 8 is operated. It is something.

In the apparatus constructed in this way, the case where a large amount of shot particles are projected will be explained first. With the gate 5 closed and the shot grains stored in the tank 4, and the piston rod 9a of the second cylinder 9 retracted to the stroke end, compressed air is supplied into the first cylinder 8 from the rod side.
When the cylinder 8 is retracted and the gate 5 is opened around the support shaft 6, the shot grains in the tank 4 pass through the chute 3 from the lower opening of the chute 3 to the lower opening 2a of the cover member 1. The light flows into a projection device (not shown) and is projected onto a target object. Further, the flow rate of the shot particles in this case is finely adjusted using the adjustment bolt 14.

Next, to explain the case of projecting a small amount of shot particles, the adjusting nut 12 is adjusted by an appropriate spiral movement, compressed air is supplied into the second cylinder 9 from the head side, and the piston rod 9a of the second cylinder 9 is adjusted. into the first cylinder 8, and the piston rod 9a of the second cylinder 9
The piston rod 8a of the cylinder 8 is pushed out to shorten the cylinder stroke of the first cylinder 8, and the gap between the lower opening of the chute 3 and the gate 5 is narrowed, thereby regulating the flow rate of shot particles.

At this time, the compressed air supplied into the first cylinder 8 is supplied to the second cylinder 9 so that the piston rod 9a of the second cylinder 9 is not pushed in by the piston rod 8a of the first cylinder 8. Compressed air is supplied at a slightly lower pressure than the compressed air used. Further, the cylinder diameter of the second cylinder 9 may be slightly larger than that of the first cylinder 8. Further, the flow rate of the shot particles in this case is finely adjusted by the adjusting nut 12.

As is clear from the above explanation, according to the present invention, even when the flow rate of shot particles is adjusted in two stages, large and small, only one cut valve is required, so the mechanism is simplified and compact. At the same time, it has the effect of reducing costs and making a significant contribution to this type of industry.

[Brief explanation of the drawing]

Fig. 1 is a front sectional view showing an embodiment of the present invention, Fig. 2 is a front sectional view showing an embodiment of the present invention;
The figure is a side sectional view of FIG. 1. 3: Shoot, 4: Tank, 5: Gate, 6:
Support shaft, 7: 2-stage cylinder, 8: 1st cylinder,
9: Second cylinder, 12: Adjustment nut, 14: Adjustment bolt.

Claims (1)

[Scope of utility model registration request] A chute 3 is attached to the lower surface of the discharge port of the shot storage tank 4 so as to be substantially concentric with the discharge port, and a gate 5 that can be opened and closed is attached to the lower opening of the chute 3 at an intermediate position of the chute 3 on a support shaft. In the shot cut valve, which is rotatably provided via a first cylinder 8, a piston rod 9a which is connected concentrically to the rear end of the first cylinder 8 and whose tip end is inserted into the first cylinder 8, A piston rod 8 in the first cylinder 8 of the two-stage cylinder 7, which is composed of a second cylinder 9 whose rear end is slidably protruded to the rear of the rear cover.
The tip a is rotatably connected to the side wall of the gate 5, and the piston rod 9 of the second cylinder 9
A shot cut valve characterized in that an adjustment nut 12 is provided at the rear end of the piston rod 9a so that the adjustment nut 12 can be moved forward and backward, and an adjustment bolt 14 is provided opposite the rear end of the piston rod 9a of the second cylinder 9 so that the adjustment bolt 14 can be moved back and forth.