JPH0120622Y2 - - Google Patents

Description

[Detailed description of the invention] The invention consists of a main shaft that is rotated by an electric motor together with an ice holding plate provided at the lower end, a worm gear that engages with a square screw formed on the main shaft and lowers the main shaft, and a worm gear that is installed coaxially with the worm gear. This invention relates to a main shaft locking mechanism for a conventional ice shaver, which is equipped with a handle for vertically moving the main shaft, and which cuts ice blocks on a cutting machine provided with a cutting blade by rotating and lowering the main shaft.

The worm gear of the conventional ice shaving machine described above has two functions: when cutting ice, the main shaft rotated by an electric motor is sent downward in accordance with the amount of ice cut, and after cutting is finished, it is rotated by a handle. It has two functions: raising or lowering the main shaft using a spring. Since the brake pressure is adjusted by adjusting the adjustment screw installed on the shaft of the shoe, the main shaft does not fall under its own weight.

Furthermore, as seen in Japanese Utility Model Publication No. 40-33020, a locking screw is provided on the back of a screw gear (worm gear) that meshes with the screw shaft (main shaft), and presses a pusher piece wrapped around a spring. Therefore, the pressure welding force is adjusted.

However, when cutting is temporarily stopped and the spindle is raised to move ice cubes in and out on the cutting machine, external force may be applied to push down the spindle that protrudes above the machine body, or the handle of the worm gear may be pressed down. If the spindle rotates by mistake, the main shaft may fall unexpectedly.
There is a risk of injuring your hands or fingers with the needles on the bottom of the ice press plate.

Although such accidents are extremely rare, the present invention aims to prevent even such rare accidents.

An embodiment of the present invention will be described.

Figure 1 shows the outline of the ice shaver 1, and the frame 2
A horizontal frame 3 covered by a safety cover 4 protrudes to the front at its upper end, and inside the safety cover 4 is a large pulley 6 rotated by an electric motor 5, which engages with the large pulley 6 with a key to rotate and move up and down. A main shaft 7 with only the main shaft 7 free is provided, and an ice pressing plate 9 at the lower end of the main shaft 7 is fixed to the front side of the frame 2.
on the cutting plate 10 equipped with the cutting blade 11,
A worm gear 13 with a shaft 14 supported on a shaft support piece 12 attached to the horizontal frame 3 is engaged with a square screw 8 formed on the outer periphery of the main shaft 7. As shown in FIG. 2, a brake wheel 15 is unrotatably attached to the shaft 14 of the worm gear 13, and a support piece 1 attached to the horizontal frame 3 is attached to the shaft 14 of the worm gear 13.
6, the shaft 18 of the brake shoe 17 that is in contact with the brake wheel 15 is screwed together, and the spring 19 is connected to the shaft 18 between the brake shoe 17 and the support piece 16.
Wrap it loosely.

A handle 20 is fixed to the shaft 14 of the worm gear 13 at a protruding end that protrudes to the outside of the safety cover 4.
A worm gear 1 that rotates with the rotation of the handle 20
The above-mentioned raising and lowering of the main shaft 7 is caused by a square screw 8 that meshes with the shaft 3.

In the present invention, in the above-described known configuration, a mounting base 21 corresponding to the outer periphery of the worm gear 13 is mounted on the horizontal frame 3, and the shaft portion 23 of the stopper pin 22 is passed through the mounting base 21 so as to be freely slidable and rotatable. The end of the section 23 is made to protrude from the safety cover 4 to the front, and a knob 24 is attached to it.

The shaft portion 23 of the stopper pin 22 has an engaging pin 25 that restricts the advance of the tip, and a coil spring 27 that is loosely fitted to the shaft portion between the fixing ring 26 and the mounting base 21 at a position slightly retracted from the tip. will be established. This stopper pin 22 is made of a bar with a circular cross section, the tip of which is cut off diagonally to form a slope 29, and its protruding end serves as an engagement tip 28 that enters the valley between the teeth of the worm gear 13.

The above locking mechanism according to the present invention is used for operations other than the process of cutting ice blocks, that is, when the electric motor 5 is stopped and the rotation of the main shaft is stopped, the engaging tip 28 of the stopper pin 22 is engaged between the teeth of the worm gear 13 to generate a coil spring. 27 to make the worm gear 13 non-rotatable, thereby locking the vertical movement of the main shaft 7 that engages with the engagement tip 28. Also, the main shaft 7
When rotating by the electric motor 5, it is necessary to remove the engagement tip 28 of the stopper pin 22 from engagement with the worm gear 22. In this case, knob 2
4, the slope 29 comes to the position shown by the two-dot chain line in FIG. 3, and the engagement of the worm gear 13 by the engagement tip 28 is released, thereby unlocking the main shaft.

A wedge-shaped engagement tip 28a shown in FIG. 4 can be provided at the tip of the stopper pin 22. In this case, a collar 30 shown in the figure is provided on the mounting base 21, and a groove 31 into which the engagement pin 25 is inserted is formed. To remove the engagement tip 28a from the worm gear 13, pull the stopper pin 22 with the knob 24, rotate it approximately 90 degrees, and push the engagement pin 25 into the engagement recess 32 on the end surface of the collar 30 as shown by the chain line in the figure. guess.

As clarified from the above explanation, the present invention first stops the electric motor 5 to stop ice shaving,
Rotate the worm gear 13 by the handle 20,
After the worm gear 13 and the square screw 8 on the outer periphery of the main shaft 7 that mesh with the worm gear 13 have finished moving up the main shaft 7 like a pinion and a rack, the engaging tip 28 of the stopper pin 22 is inserted into the worm gear 13. It is inserted between the teeth to make the worm gear 13 unrotatable and lock the vertical movement of the main shaft, so in addition to the effect of the conventional structure for braking the worm gear described above, the main shaft 7 is prevented from moving upward at any time. This has the effect that there is no risk of falling at times, and this simple structure of the lock mechanism has the effect of further increasing the safety of ice-shaving operations.

[Brief explanation of drawings]

The accompanying drawings show an embodiment of the present invention, with Fig. 1 showing a partially cutaway side view, Fig. 2 a partially cutaway plan view, Fig. 3 a side view of the same, and Fig. 4 showing another embodiment. FIG. 1...Ice shaver, 2...Frame, 5...Electric motor, 7...Main shaft, 8...Square screw, 9...Ice holding plate, 13...Worm gear, 21...Mounting base, 2
2... stop pin, 24... knob, 27...
Coil spring, 28, 28a... engagement tip.

Claims (1)

[Claims for Utility Model Registration] 1. A main shaft 7 that is rotated by an electric motor 5 together with an ice holding plate 9 provided at the lower end, and a worm gear 13 that engages with a square screw 8 formed on the outer periphery of the main shaft 7 to lower the main shaft 7. , is equipped with a manual handle 20 for raising and lowering the main shaft 7 provided coaxially with the worm gear 13, and rotates and lowers the main shaft 7 passed through the horizontal frame 3 to cut ice cubes on the cutting machine 10 equipped with a cutting blade. In the case where the shaft part 23 of the stopper pin 22 is rotatably or rotatably and slidably passed through a mounting base 21 attached to the horizontal frame 3, an operating knob 24 is attached to the shaft part 23, and a knob 24 is attached to the rear part. An engagement pin 25 is inserted into the front portion of the worm gear 13, and an engagement tip 28 that enters between the teeth of the worm gear 13 and locks the main shaft so that it cannot be moved up or down is formed at the front. A main shaft locking mechanism for an ice shaver, characterized in that a coil spring 27 fitted onto the shaft portion 23 is interposed between a fixing ring 26 and a mounting base 21. 2. The main shaft locking mechanism for an ice shaver according to claim 1, wherein the stopper pin 22 has a rotatable circular cross section, and the engaging tip 28 is formed as an inclined surface 29.