JPS6164363A - Propelling mechanism - Google Patents

Abstract

PURPOSE:To intermittently propel parts by tightly winding a torsion coil spring, by fixing parts to be intermittently propelled to a propelling rod and fitting the torsion coil spring around said rod. CONSTITUTION:A propelling rod 1 is inserted through a torsion coil spring 2 in a freely slidable manner and parts 3 to be intermittently propelled are fixed to said propelling rod 1. In this state, the torsion coil spring 2 is reciprocally moved to intermittently propel the parts 3. As mentioned above, operation is surely performed by an extremely simple structure.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a propulsion mechanism used to intermittently propel a piston in an adhesive extrusion tool or the like.

[Conventional technology]

Conventionally, a ratchet mechanism or the like has been used to perform the above-described operation. This uses a pawl and a pawl wheel, but the mechanism tends to be complicated (
In particular, it is difficult to incorporate this mechanism in the case of small products. Therefore, it has the same effect as that,
It was hoped that a smaller and more compact propulsion mechanism would emerge.

[Purpose of the invention]

The present invention has been made in response to such demands, and aims to provide a propulsion mechanism that can be constructed compactly with an extremely simple structure, that can be easily incorporated into small products, and that operates reliably. purpose.

[Structure of the invention]

The present invention is a propulsion mechanism characterized in that a propulsion rod to which a part to be intermittently propelled is fixed is inserted into a torsion coil spring, and the part is intermittently propelled by winding the torsion coil spring and moving it forward. 1 and 2 show the principle of its operation. In the figure, reference numeral 1 denotes a normally round propulsion rod, which is slidably inserted into the coil portion of the torsion coil spring 2. A part 3 to be intermittently propelled is fixed to the propulsion rod l. In this state, if the torsion coil spring 2 is simply moved back and forth, its coil portion will slide along the propelling rod 1, and the propulsion rod 1 will not move.Therefore, before moving the torsion coil spring 2 forward, , the coil end 4.5 is pressurized in the winding direction, that is, in the direction of the arrow in FIG.

Then, the diameter of the coil is reduced and the propulsion rod 1 is tightened by the torsion coil spring 2, so that it moves together with the torsion coil spring 2. When the torsion coil spring 2 retreats, the pressure on the coil end 4.5 is released. Then, the propulsion rod 1 is released from the tightening by the torsion coil spring 2, and even if the torsion coil spring 2 retreats, it reaches its forward position. Thus, as the torsion coil spring 2 reciprocates, the propulsion ml and the parts 3 are advanced by one pitch.

[Actual example]

Next, a gun-type adhesive extruder incorporating the mechanism according to the present invention will be explained with reference to FIGS. 3 and 4. In the figure, 6 is a part of a cylinder into which a cartridge filled with adhesive is loaded, and a piston 7 is inserted from its rear open end. The one shown is a two-component adhesive extruder, and cylinders 6 are arranged side by side. In this case, a connecting member is installed which connects the tips of both cylinder parts 6.6. The distal end of the piston 7 is fixed to the propulsion rod 1. 8 is a trigger part, 9 is a part of the holder, and 10 is a torsion coil spring that always applies rotational force in the opening direction to both parts, and one is installed on the pivot of the trigger part 8. 11 is a pushing member provided at the upper end of the trigger part 8;
Reference numeral 12 denotes a hook portion formed by bending the upper end of the trigger portion 8.

Reference numeral 13 denotes a sliding body that holds the torsion coil spring 2. The coil end 4 of the torsion coil spring 2 is fixed, and the coil end 5 is bent outward to be exposed and brought into sliding contact with the hook portion 12. Reference numeral 14 denotes a return spring installed at the tip of the I thin rod 1, which is fixed to a spring restraining plate 15 installed in the cylinder part 6. This return spring 14 always acts to push back the sliding body 13.

Using the above-mentioned structure, first, the piston 7 is pulled back, then the upper cover of the cylinder part 6 is opened, a cartridge is loaded therein, and the tip of the cartridge is cut off to open the cartridge. Then, grasp the holder part 9, put your finger on the trigger part 8, and pull it.

Then, the hook part 12 rotates and pushes down the coil end part 5 which is in sliding contact with the hook part 12. As a result, the coil end 4
Since this is more fixed, the propulsion rod 1 is wound tightly around the coil.

On the other hand, along with the movement of the trigger part 8, the pushing member 11 also rotates,
The sliding body 13 is pushed forward against the return spring 14. At this time, since the propulsion rod 1 is tightly wound around the torsion coil spring 2, it moves forward together with the sliding body 13. When the trigger member 8 is released, it returns to its original position by the action of the torsion coil spring 13, and the pressurized state of the coil end 5 by the hook part 12 is released, as well as the pressurized state of the sliding body 13 by the pushing member 11. be done. As a result, the torsion coil spring 2 and the sliding body 13 become capable of sliding along the advancing rod 1, and are pushed back to their original positions by the action of the return spring 14. In this way, the propulsion rod 1 and the piston 7 fixed thereto move forward by one pitch,
That's the power - Tori.

The adhesive inside the cage will be pushed out. Thereafter, by repeating the above-mentioned operation, a fixed amount of energy will be exerted.

〔Effect of the invention〕

As described above, the present invention has an extremely simple structure, can be easily incorporated into small products, and has the advantage of reliable operation.

[Brief explanation of the drawing]

1 and 2 are diagrams showing the structure of the present invention, and FIGS. 3 and 4 are diagrams showing the structure when the present invention is applied to an adhesive extrusion tool. Explanation of symbols 1 - Thin rod, 2 - Torsion coil spring, 3 - Parts, 4
．． 5-Coil end Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] A propulsion mechanism characterized in that a propulsion rod to which a part to be intermittently propelled is fixed is inserted into a torsion coil spring, and the part is intermittently propelled by moving the part forward while tightening the torsion coil spring.