JPH0351098Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a grindstone cover device that allows quick adjustment of the movement of an auxiliary cover when replacing the grindstone.

[Prior Art] A grinding wheel cover device which adjusts the gap between the grinding wheel and an auxiliary cover that protects the front part thereof as the grinding wheel wears out is disclosed in Japanese Utility Model Publication No. 59-1-1 filed by the present applicant.
It is described in Publication No. 33585. This device has an auxiliary cover supported movably relative to the cover body by a support shaft, and in particular, the tip of the auxiliary cover is configured to be movable in the radial direction of the grindstone.

Another conventional grindstone cover device is one in which the above distance is adjusted by simply swinging the auxiliary cover around a support shaft.

[Problems to be Solved by the Invention] However, although the conventional grindstone cover device can adjust the distance between the auxiliary cover and the grindstone, which increases due to wear of the grindstone, there is a problem in that it is not easy to adjust the distance. That is, to adjust the distance between the auxiliary cover and the grinding wheel, loosen the screws that fix the auxiliary cover to the cover body, then adjust the auxiliary cover to the specified position, and finally tighten the screws again to attach the auxiliary cover to the cover body. It needs to be fixed.

When replacing a worn grindstone, the operation is similar to that described above, and the auxiliary cover is moved by loosening the screw to a position where the grindstone can be replaced. Next, replace the grindstone, align the auxiliary cover to a predetermined position, and finally tighten the screws again to the predetermined position to fix the auxiliary cover.

As can be seen from the above description, the conventional grindstone cover device is inconvenient because the screw for adjusting the distance between the auxiliary cover and the grindstone must be rotated many times each time the grindstone is replaced.

The present invention has been developed in view of the above-mentioned problems, and an object of the present invention is to provide a grindstone cover device in which the distance between the grindstone and the tip of the auxiliary cover can be easily adjusted.

[Means for Solving the Problems] The grinding wheel cover device of the present invention includes a cover body that surrounds a predetermined portion of a rotating grindstone, an auxiliary cover that is held movably relative to the cover body, and a threaded surface on a part of the cover body. a first engagement member that is held by one of the cover body and the auxiliary cover and holds the screw shaft rotatably but immovably in the axial direction;
a second engaging member having a threaded surface that engages with the screw shaft when biased in one direction and disengages from the screw shaft when biased in the other direction; and a holding member that is held by the other and is capable of holding the second engaging member at a plurality of spatial positions with respect to the screw shaft.

The cover body is a member that surrounds the grindstone except for the front part, and has a door for replacing the grindstone.

The auxiliary cover is a member that is movably held relative to the cover body and surrounds the upper front part of the grindstone.

The screw shaft is a member that has a threaded surface that engages with the second engagement member in a part thereof, and corrects the relative position of the cover main body and the auxiliary cover by rotation.

The first engaging member is a member that is held by one of the cover main body and the auxiliary cover and holds the screw shaft in a rotatable and axially immovable manner.

The second engagement member is a member that has a threaded surface that engages with the screw shaft when biased in one direction, and separates from the screw shaft when biased in the other direction opposite to the one direction.

The holding member is held by the other of the cover main body and the auxiliary cover, and moves the second engaging member to one of a plurality of predetermined positions relative to the screw shaft (for example, a spatial position where both are screwed together or a space where both are not screwed together). spatial position)
This is a member that is held in the

[Operation] To replace the grindstone in the grindstone cover device of the present invention, first, the second engagement member is urged in the other direction to release the threaded engagement between the screw shaft and the second engagement member. The holding member holds the second engagement member in the unscrewed position.

Next, the auxiliary cover is moved relative to the cover body to a position where the grindstone can be replaced, and the grindstone is replaced.

Next, align the auxiliary cover to a predetermined position, and further bias the second engaging member in the above one direction to engage the screw shaft and the second engaging member.
The second engaging member is screwed together with the second engaging member, and the holding member holds the second engaging member in the screwed position.

Further, in order to maintain the distance between the tip of the auxiliary cover and the grindstone within a certain range, as the grindstone wears, the screw shaft is rotated to change the relative position between the screw shaft and the second engaging member. The first engagement member that rotatably holds the screw shaft moves relative to the second engagement member that is threadedly engaged with the screw shaft, and the auxiliary cover (or cover body) that holds the first engagement member moves relative to the second engagement member that engages with the screw shaft. It moves relative to the cover body (or auxiliary cover) that holds the engagement member. After all, since the grindstone remains stationary with respect to the cover body, the auxiliary cover moves relative to the grindstone.

[Example] Example 1 A side view and a front view of an example of the device of the present invention are shown in FIGS. 1 and 2, respectively, and the A-
Cross-sectional views taken along line A' and line B-B' are shown in FIGS. 3 and 4, respectively.

The device of the present invention is composed of a cover main body 1, an auxiliary cover 2, a screw shaft 3, a first engaging member 4, a second engaging member 6, and a holding member 7.

The cover main body 1 is a member that surrounds the other parts of the grindstone 8 except for the front part, and has a screw shaft cover 13 on its upper part. A hinge 1 is attached to one side of the cover body 1.
4, 15 and clamp levers 16, 17 to close door 1.
2 is attached so that it can be opened and closed. Support 13
is fixed to the upper part of the cover body 1 and supports the auxiliary cover 2 so that it can be opened and closed.

The rotary whetstone 8 is removably supported by a whetstone shaft rotatably supported on a whetstone stand (not shown).

The auxiliary cover 2 is a member that is rotatably held on a support shaft 21 attached to the support 13 and surrounds the front part of the grindstone 8.

The screw shaft 3 is attached to the cover body 1 as shown in FIG.
It is a rod-shaped member arranged in parallel to the rotating surface of the grindstone at the upper part of the grindstone to adjust the position of the auxiliary cover 2, and has a threaded surface 31 on a part of which is screwed into the second engagement member 6. A handle (not shown) is attached to the front end of the screw shaft 3.
Square part 32 for attaching and rotating the screw shaft 3
is formed. Furthermore, the square part 32 and the threaded surface 3
1 and has a larger diameter portion 33 having a larger diameter.

Note that, as will be explained later, the screw shaft 3 engages with the first engagement member 4 at its front portion (front side),
The intermediate portion thereof engages with the second engaging member, and the rear portion thereof engages with the guide member.

As shown in the cross-sectional views of FIGS. 4 and 6, the first engaging member 4 includes a cylindrical portion 41, a through hole 42, a shaft portion 43, and a threaded portion 44, which are chamfered at the front end 46 and rear end 47. Motsu. The first engaging member 4 is rotatably held by the auxiliary cover 2 by screwing a nut 45 into the threaded portion 44 .

The screw shaft 3 is inserted through the through hole 42 . In order to prevent the screw shaft 3 from moving in the axial direction, the front end 46 of the first engaging member 4 abuts the rear end of the large diameter portion 33 of the screw shaft 3, and the rear end 47 of the first engaging member 4 It abuts the front end of a tightening ring 48 fitted on the screw shaft 3. Furthermore, the tightening ring 48 has a screw hole,
It is fixed to the screw shaft 3 by a screw 49 that is screwed into the screw hole.

As shown in FIG. 8, the guide member 5 is fixed to the cover body 1 and has a U-shaped groove 51 for movably guiding the screw shaft 3 within one plane.

As shown in FIG. 7, the second engaging member 6 includes a rectangular portion 62 with a rounded top and a through hole 61 into which the screw shaft 3 is inserted, and a cylindrical portion 64 protruding from one surface 63 of the rectangular portion 62. , and a cylindrical portion 71 protruding from a surface 69 opposite to one surface 63 of the square portion 62. The cross section of the through hole 61 perpendicular to the screw shaft 3 is approximately elliptical, and a part of the inner peripheral surface of the through hole 61 has the screw shaft 3.
A semicircular thread surface 65 is formed which is screwed into the outer periphery of half of the thread surface.

There are two ring-shaped Vs on the circumferential surface of the cylindrical portion 64.
Grooves 67 and 68 are formed. The cylindrical portion 71 is slidably and rotatably supported in the hole 15 of the cover body 1. A knob 72 is provided at one end 73 of the cylindrical portion 71.
are screwed together.

The holding member 7 is fixed to the horizontal surface portion of the cover main body 1 with a bolt (not shown) or the like, and has a through hole 69 for slidably and rotatably holding the cylindrical portion 64. An upright through hole 80 is opened in the through hole 69 , a metal ball 81 and a coil spring 82 are inserted into the upright through hole 80 , a screw 83 is tightened, and the coil spring 82 pushes the metal ball 81 into the V-shaped groove 67 . 6
8 in the direction of engagement. Support body 131
The cylindrical portion 71 is slidably and rotatably held in the through hole 83 formed in the through hole 83 .

The operation of the device of the present invention will be explained below.

In order to replace the grindstone 8 in the grindstone cover device of the present invention, first the clamp levers 16 and 17
is released to open the door 12, and the knob 72 is pressed to release the threaded engagement between the second engaging member 6 and the screw shaft 3.

Next, the auxiliary cover 2, which is pivotable about the support shaft 21, is pivoted to a position where the grindstone 8 can be replaced. FIG. 5 shows the attitude of the screw shaft 3 when the auxiliary cover 2 is rotated by θ. The screw shaft 3 rotates in the opposite direction to the auxiliary cover 2 around the central axis W of the first engaging member 4 (shown in FIG. 6), and extends through the through hole 61 of the second engaging member 6 and the guide member 5. Slide the groove 51 forward. Furthermore, the second engaging member 6 rotates by a predetermined angle about the central axis V (shown in FIG. 7).

In this state, the grindstone 8 fixed to the grindstone shaft (not shown) is replaced.

Next, close the door 12 and close the clamp levers 16, 17.
Tighten.

Next, the auxiliary cover 2 is positioned at a predetermined position, the knob 72 is pulled, and the screw shaft 3 and the second engaging member 6 are screwed together and fixed. Note that when the second engaging member 6 is not biased by the knob 72, the ball 81 engages with either the groove 67 or 68 of the cylindrical portion 64 to prevent unnecessary displacement of the cylindrical portion 62 in the axial direction. do.

As explained above, according to the apparatus of this embodiment, the grindstone can be easily replaced.

In addition, in order to adjust the distance between the tip of the auxiliary cover 2 and the grindstone, use the knob 72 as in the case of replacing the grindstone.
The screw shaft 3 and the second engaging member 6 may be unscrewed by pressing , and after turning the auxiliary cover 2 a little, the knob 72 may be pulled to perform the above-mentioned screw engagement again.

Furthermore, by simply engaging a handle (not shown) in the hole 32 at the tip of the screw shaft 3 and rotating the handle, the second engaging member 6 supported by the cover body 1 and the screw shaft 3 are screwed together. Therefore, the distance between the tip of the auxiliary cover 2 and the grindstone 8 can be adjusted.

In the above embodiment, the first engaging member 4 may be rotatably installed on the cover body 1, and the holding member 7 for holding the second engaging member 6 may be installed on the auxiliary cover 2. However, in this embodiment, it is preferable to change the positional relationship between the first engaging member 4 and the second engaging member 6.

Further, in the above embodiment, the auxiliary cover 2 merely pivots around the support shaft 21, but it is also possible to move it linearly or curvedly.

[Effects of the invention] As explained above, the grindstone cover device of the present invention has a screw shaft and a second engaging member that is releasably engaged with the screw shaft, and the second engaging member is arranged to intersect with the screw shaft. The auxiliary cover can be moved relative to the cover main body by moving the auxiliary cover in the direction shown in FIG.

Therefore, according to the present invention, the following effects can be expected.

(1) The grindstone can be replaced by two operations: the action of releasing the threaded connection between the second engagement member and the screw shaft by the biasing of the holding member, and the action of moving the auxiliary cover.
There is no need to rotate the screw many times as in conventional devices.

(2) It is easy to adjust the distance between the auxiliary cover and the grindstone. That is, the distance between the auxiliary cover and the grindstone can be adjusted by the above two operations, and there is no need to rotate the screw many times as in the conventional device. Furthermore, the distance between the auxiliary cover and the grindstone can be adjusted by rotating the screw shaft.

[Brief explanation of the drawing]

FIG. 1 is a side view showing one embodiment of the grindstone cover device of the present invention. 2 is a front view of the apparatus of FIG. 1; FIG. FIG. 3 is a sectional view of the screw shaft 3 taken along the line A-A'. FIG. 4 is a sectional view of the screw shaft 3 taken along the line B-B'. FIG. 5 is a sectional view of the screw shaft 3 with the auxiliary cover 2 rotated by θ. 6th
The figure is a sectional view of the first engaging member 4. FIG. 7 is a sectional view of the second engaging member 6 and the holding member 7. FIG. 8 is a sectional view of the guide member 5. Figure 9 is the second
FIG. 2 is a perspective front view of the illustrated device; 1...Cover body, 2...Auxiliary cover, 3...
Screw shaft, 4...first engaging member, 5...guiding member,
6... Second engaging member, 7... Holding member.

Claims (1)

[Scope of Claim for Utility Model Registration] A cover body that surrounds a predetermined part of the rotating grindstone, an auxiliary cover held movably relative to the cover body, a correction screw shaft having a threaded surface in part, and the above-mentioned A first member that is held by one of the cover body and the auxiliary cover and holds the screw shaft rotatably but immovably in the axial direction.
an engaging member; a second engaging member having a threaded surface that engages with the screw shaft when biased in one direction and detaches from the screw shaft when biased in the other direction; and a second engagement member that disengages from the screw shaft when biased in the other direction. and a holding member held by the other side of the auxiliary cover and capable of holding the second engaging member at a plurality of spatial positions with respect to the screw shaft.