JPS6015602Y2 - knife mounting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a knife attachment device for attaching a knife of a side trimmer to a spindle.

In order to attach a knife of a conventional sand trimmer to a spindle, for example, as shown in FIGS. At the same time,
Screw the tightening nut 6 onto the threaded end of the spindle 3,
A knife 4 is clamped and fixed between a tightening nut 6 and a collar 13 provided on a spindle 3.

However, in this device, in order to screw the tightening nut 6 into the threaded part of the spindle 3, the tightening nut 6 must be rotated more than ten times with a spanner, etc., and two sets of knives in the equipment are required for replacement. The disadvantage is that it requires a lot of time and effort to attach and detach.

The present invention has been made to improve this drawback, and includes a collar portion having a vertical groove in the axial direction at the end of the spindle, and a ring that is fitted into the collar portion and locks rotationally. The knife is fixed to the spindle by a tightening nut that is attached to the spindle and screwed into the ring, and when replacing the knife, the knife can be attached and detached quickly, reliably, and easily. It has a device that can do this.

The embodiment will be described below with reference to FIG. 3.4.5.6.

Reference numeral 1 denotes a housing to which a bearing 2 is fixedly installed, a spindle 3 is supported by the bearing 2, and the spindle 3 is rotated by a drive device (not shown).

A knife 4 is fitted into the spindle 3, and the knife 4 is locked to the spindle 3 by a key 5.

Next, the knife 4 can be reliably fixed to the spindle 3 by a ring 7, a tightening nut 6, and a stopper 11 so as not to loosen due to vibrations or the like during operation.

That is, the end of the spindle 3 is provided with a collar 10 having four vertical grooves 8 in the axial direction;
The ring 7 that is inserted into the end of the collar 10 from the collar 10 side has four claws 9 in its center hole that correspond to the vertical groove 8 of the collar 10 and have a shape that allows the ring to pass through the vertical groove 8. is provided so that it can be inserted along the vertical groove 8.

Further, the ring 7 is provided with a groove 12 between the claws 9 in the direction toward the center of the ring.

Therefore, by inserting the ring 7 into the vertical groove 8, turning it 450 turns after insertion, and inserting the stopper 11 across the groove 12 and the vertical groove 8 of the collar 10, the ring 7 is locked to the spindle 3. be able to.

Further, the outer circumferential portion of the ring has a male thread, into which a tightening nut 6 is screwed.

For this purpose, if the tightening nut 6 is screwed onto the ring 7 before inserting the ring 7 into the spindle 3, the tightening nut 6 can be rotated slightly after the ring 7 is locked onto the spindle 3. The knife 4 can be reliably clamped and fixed between the tightening nut 6 and the collar portion 13 provided on the spindle 3 in a short period of time.

Although the above description has been made regarding the order in which the knife is fixed to the spindle, the order in which the knife is removed can be performed in the reverse order of the above description.

As described in detail above, the present invention provides a device that allows a knife to be attached and detached reliably and easily in a short period of time.

[Brief explanation of drawings]

1 and 2 show a front sectional view and a side view, respectively, of a conventional device. Figure 3 is a front sectional view of a knife mounting device to which the present invention is applied;
4 is a side view, FIG. 5 is a sectional side view taken along line 1-1 in FIG. 3, and FIG. 6 is a sectional side view taken along line 1-1 in FIG. 3. 3...Spindle, 4...Knife, 6
...Tightening nut, 7...Ring, 8.
...Vertical groove, 9...Tlaw, 10...
...Brim part, 11... Clasp.

Claims (1)

[Scope of utility model registration request] A collar having a vertical groove in the axial direction is provided at the end of the spindle, and a ring is provided at the spindle end to be inserted from the collar side, and the center hole of the ring corresponds to the vertical groove of the collar. In addition, a pawl with a shape that can pass through the vertical groove is provided, a male screw is provided on the outer circumference of the ring, and a holder hole for a stopper is drilled toward the center of the ring. A knife attachment characterized in that a stopper is provided that is inserted across the groove, a nut for tightening the knife is screwed onto the outer circumferential portion of the ring, and a collar portion is provided on the spindle to clamp the knife portion together with the outer nut. Device.