JPH085012Y2 - Blade tip mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a detachable mounting structure for a tip of a stone cutting blade, in particular.

(Prior Art) Generally, a grindstone called a blade as shown in FIG. 9 is used for cutting a stone material or the like. In the figure, 1 is a disc-shaped base metal made of steel. The periphery of the base metal 1 is divided into a large number of segments 3 by the slots 2. 4 is a chip attached to the segment 3. The tip 4 generally contains diamond abrasive grains. Since such a blade becomes more expensive as it becomes larger, it is desirable that the tip 4 be reused even when it wears out and reaches the end of its life. However, in the past, since the tip was mounted by brazing, we have dedicated equipment to remove the old tip and attach the new tip,
Since it takes time and labor and requires heating at a high temperature, there is a possibility that the properties of the heat-treated base metal may deteriorate.

As a solution to this, a detachable tip mounting structure as shown in FIG. 10 has been proposed (German Patent
No. 2314977). In the figure, 11 is a support piece brazed to the back surface of the chip 4, and 12 is a socket brazed on the segment 3. The support piece 11 is formed with a projection 11a and the socket 12 is formed with a dovetail groove 12a, both of which are narrowed toward the side opposite to the rotational direction R of the blade. In this mounting structure, the projection 4a is inserted into the dovetail groove 12a and is pushed in the direction opposite to the rotational direction R to fix the chip 4 to the segment 3.

(Problems to be solved by the device) However, the mounting structure shown in FIG. 10 has the following problems. That is, as shown in FIG. 11, the dovetail groove 12a is vulnerable to the force (F in FIG. 11) pushed open by the wedge action, and the groove width tends to widen. Grinding resistance that acts shockingly when cutting a stone material becomes a force for press-fitting a wedge, and the same force also acts every time the chip 4 is repeatedly attached and detached. If the groove width is widened by such a wedge action, the tip 4 cannot be fixed at the correct position on the segment 3, and it becomes impossible to fix the tip 4 at a remarkable time.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a blade tip mounting structure capable of detachably mounting a tip and always fixing the tip in a correct position.

(Means for Solving Problems) The chip mounting structure of the present invention comprises a socket fixed on the periphery of the base metal and a support piece fixed on the back surface of the chip. The socket is surrounded on all sides. Has an L-shaped hole formed therein, the hole extending downward from the upper surface of the socket and further opposite to the rotation direction of the blade, and the hole has a space between both side surfaces thereof and a rotation direction of the blade. The upper and lower surfaces of the portion extending to the opposite side are formed so that the distance between them becomes gradually narrower toward the side opposite to the rotation direction of the blade, and the supporting piece is an L-shaped insertable into the hole of the socket. The protrusion extends downward and further extends in the direction opposite to the rotating direction of the blade, and the protrusion extends in the direction opposite to the gap between the side surfaces and the rotating direction of the blade. The distance between the upper and lower surfaces is opposite to the rotating direction of the blade. It is formed so that the width becomes gradually narrower toward the side, and when the protrusion is inserted into the hole of the socket and moved to the side opposite to the rotation direction of the blade, the narrowed part is the hole of the socket. It is characterized in that it is formed so as to fit into the narrowed portion of the.

(Operation) Since the L-shaped hole of the socket is surrounded on all sides, it is hardly pushed open even if a force based on the wedge action by the protrusion of the support piece is applied.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. First
FIG. 2 is a perspective view showing a chip mounting structure of the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, FIG. 3 is a view taken along arrow III of FIG.
1 is a view taken along the line IV of FIG. 1, FIG. 5 is a view taken along the line V of FIG. 1, and FIG. 6 is a sectional view taken along line VI-VI of FIG. In Fig. 1, 2
Reference numeral 0 is a rectangular parallelepiped socket brazed on the segment 3, and reference numeral 30 is a support piece brazed to the back surface of the chip 4.
Further, R indicates the rotation direction.

As shown in FIG. 2, the socket 20 is formed with a hole 21 having a quadrangular cross section which penetrates the center in the longitudinal direction, and two holes 22 which extend downward from the upper surface so as to communicate with the hole 21.
23 are formed at intervals in the longitudinal direction. The upper surface 21a of the hole 21 is tapered so that the height H1 gradually decreases toward the side opposite to the rotational direction R, and both side surfaces 21b also face the opposite side to the rotational direction R as shown in FIG. Width W1
Is a taper surface so that becomes gradually smaller. Lower surface 21c
Is a horizontal plane. As shown in FIG. 4, the holes 22 and 23 also have a quadrangular cross section, and both side surfaces 22a and 23a are tapered so that the widths W2 and W3 are gradually reduced toward the side opposite to the rotation direction R. ing. Both sides 22a of hole 22 and both sides 21b of hole 21
And are continuous as a plane without steps. Both sides of hole 23
The same applies to 23a and both side surfaces 21b of the hole 21.

The support piece 30 is integrally formed with L-shaped projections 31 and 32 that are inserted into the holes 21 through the holes 22 and 23 of the socket 20. In the protrusion 31, both side surfaces 31a are tapered so that the width W4 gradually decreases toward the side opposite to the rotation direction R, and the upper surface 31b also gradually increases the height H2 toward the side opposite to the rotation direction R. It is tapered so that it becomes smaller. When the projection 31 is inserted by abutting the surface 31c on the R direction of rotation with the surface 22b (FIG. 4) of the hole 22 on the R direction of rotation direction, each side surface 3
1a and each side surface 22a of the hole 22 are in a parallel relationship with a gap therebetween, and the upper surface 31b and the upper surface 21a of the hole 21 are also in a parallel relationship with a gap therebetween and the lower surface 31d is the lower surface 21c of the hole 21.
The support piece 30 is moved to the opposite side to the rotation direction R so that the surface 30a on the rotation direction R side of the support piece 30 matches the surface 20a on the same side of the socket 20. In this case, the side surfaces 31a and the side surfaces 22a are in pressure contact with each other and the upper surface 31b
And the upper surface 21a are also formed in pressure contact. The protrusion 32 is
When the surface 31c of the projection 31 is brought into contact with the surface 22b of the hole 22, the surface 32c on the rotational direction R side is formed to contact the surface 23b on the rotational direction R side of the hole 23. Both side surfaces 32a are tapered so that the width W5 gradually decreases toward the side opposite to the rotational direction R, and the upper surface 32b also gradually decreases the height H3 toward the side opposite to the rotational direction R. It has a tapered surface. When the surface 32c is brought into contact with the surface 23b, each side surface 32a and each side surface 23a are in a parallel relationship with a gap therebetween, and the upper surface 32b and the upper surface 21a of the hole 21 also have a clearance therebetween. The lower surface 32d is formed so as to be parallel to each other, and the lower surface 32d is formed so as to contact the lower surface 21c of the hole 21.
When the support piece 30 is moved to the side opposite to the rotation direction R so that a is aligned with the surface 20a on the same side of the socket 20, each side surface 32a and each side surface 23a are in pressure contact with each other and the upper surface 32b and the upper surface 32b. 21a is also formed in pressure contact.

Further, as shown in FIGS. 4 and 5, the length of the protrusion 31 in the longitudinal direction and the length of the hole 22 in the longitudinal direction are both equal to L1, and the length of the protrusion 32 in the longitudinal direction and the length of the hole 23 in the longitudinal direction are equal to each other. Together length
Equal in L2.

In the structure described above, the chip 4 is attached to the segment 3 as follows. That is, the surface 31c of the protrusion 31 is made
With the surface 32b of the projection 32 and the surface 32c of the projection 32 in contact with the surface 23b of the hole 23, the projections 31 and 32 are inserted into the holes 22 and 23, and the lower surfaces 31d and 32d are attached to the lower surface 21c of the hole 21. Abut. Then, the support piece 30 is moved to the side opposite to the rotational direction R so that the surface 30a of the support piece 30 matches the surface 20a of the socket 20. As a result, the protrusion 31 is fixed so as to be sandwiched between the holes 22 and 21, and the protrusion 32 is fixed so as to be sandwiched between the holes 23 and 21. Therefore, the chip 4 is fixed in a fixed position with respect to the socket 20 and thus the segment 3.

FIG. 7 is a sectional view showing a state in which the tip 4 is attached to the segment 3 as described above. In the state of being attached in this way, a force acting in the direction opposite to the rotation direction R acts on the support piece 30, and a force based on the operation by the protrusions 31, 32 is applied to the holes 22, 23, and 21. Join to push open. However, holes 22 and 23 are surrounded on all sides, and also hole 21
Unlike the groove, since the upper surface is bridged by the portions 24a, 24b, 24c, it strongly resists the force due to the wedge action by the protrusions 31, 32. For this reason, the widths W2, W3 (FIG. 4) and W1 (FIG. 3) of the holes 22, 23 and the hole 21 hardly expand as compared with the beginning. Therefore, the protrusions 31 and 32 are always fixed at the same position, and the tip 4 is fixed at a fixed position with respect to the segment 3. Further, the protrusion 31 is fixed so as to be sandwiched between the holes 22 and 21, and the protrusion 32 is fixed so as to be sandwiched between the holes 23 and 21, and the protrusion 31 is held by the portion 24b and the protrusion 32 is held by the portion 24c. Therefore, the protrusions 31 and 32 cannot be pulled out upward from the socket 20.

The chip 4 is detached from the segment 3 by tapping the chip 4 in the direction of rotation R and moving it so that the projections 31 and 32 are pulled out upward from the socket 20.

(Effect of the Invention) As described above, the chip mounting structure of the present invention is composed of the socket 20 fixed on the periphery of the base metal 1 and the support piece 30 fixed on the back surface of the chip 4. Has an L-shaped hole (holes 22, 21 and holes 23, 21) surrounded on all sides, and the hole extends downward from the upper surface of the socket 20 and is opposite to the rotational direction R of the blade. To the side, the hole is
The upper and lower surfaces (upper surface 21
The distance between a and the lower surface 21c) is gradually narrowed toward the side opposite to the rotational direction R of the blade, and the support piece 30 has an L-shaped protrusion 3 that can be inserted into the hole of the socket.
1 and 32, the projections 31 and 32 extend downward and further to the side opposite to the rotational direction R of the blade, and the projections 31 and 32
Reference numeral 32 designates the upper and lower surfaces (upper surface 31
b, 32b, lower surfaces 31d, 32d) are formed so that the distance between them is gradually narrowed toward the side opposite to the rotational direction R of the blade, and the protrusions 31, 32 are inserted into the holes of the socket 20. When the blade is moved to the side opposite to the rotational direction R, the narrowed portion is formed to fit into the narrowed portion of the hole of the socket 20. Therefore, the present invention has the following effects.

(1) To mount the chip 4, insert the protrusions 31 and 32 into the holes 22 and 21.
And the holes 23 and 21, respectively, and the tip 4 may be moved to the side opposite to the rotational direction R of the blade.
To remove it, do the reverse. That is, according to the present invention, the chip 4 can be removably attached to the segment 3.

(2) Since the L-shaped holes (holes 21, 22, 23) of the socket 20 are surrounded on all sides, the force due to the wedge action by the protrusions 31, 32 is applied to push the hole against the hole. However, the hole strongly resists it and rarely expands from the beginning. That is, according to the present invention, the protrusions 31 and 32 can be always fixed at the same position, and the chip 4 can be fixed at a fixed position with respect to the segment 3.

(3) Since the protrusion 31 can be fixed so as to be sandwiched from both sides and the upper and lower sides by the holes 22 and 21, and the protrusion 32 can be fixed so as to be sandwiched from both sides and the upper and lower sides by the holes 23 and 21, the protrusions 31 and 32 can be pulled out upward from the socket 20. Can be prevented. That is, according to the present invention, the tip 4 can be prevented from coming off the segment 3 during the work.

(Other Embodiments) The number of protrusions formed on the support piece may be three or more, or may be one as shown in FIG. In this case, the hole of the socket 20 is an L-shape having a hole 42 and a hole 41, and the hole 41 does not penetrate the socket 20 in the longitudinal direction.
Reference numeral 33 is one protrusion formed on the support piece 30.

Other configurations are the same as those for the holes 21 and 22 of the protrusion 31 or the holes 21 and 23 of the protrusion 32 in the above-described embodiment.

[Brief description of drawings]

1 is a perspective view showing the chip mounting structure of the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 3 is a view taken in the direction of arrow III of FIG.
FIG. 4 is a view taken in the direction of arrow IV of FIG. 1, FIG. 5 is a view taken in the direction of arrow V of FIG. 1, FIG. 6 is a sectional view taken along line VI-VI of FIG. 1, and FIG. FIG. 8 is a sectional view showing a state in which is attached to a segment, FIG. 8 is a sectional view showing a tip mounting structure according to another embodiment of the present invention, FIG. 9 is a plan partial view showing a general blade, and FIG. FIG. 11 is a perspective view showing the chip mounting structure of FIG. 11, and FIG. 11 is a sectional view showing the problems of the conventional example. 1 ... Base metal, 3 ... Segment, 4 ... Chip, 20
...... Socket, 21 …… Hole, 21a …… Top surface (of hole 21), 22
…… Hole, 22a …… Side (of hole 22), 23 …… Hole, 23a ……
Side surface (of hole 23), 30 ... Support piece, 31 ... Protrusion, 31a ...
Side (of protrusion 31), 32 ... protrusion, 32a (of protrusion 32)
side

Claims (1)

[Scope of utility model registration request] 1. A mounting structure for removably mounting a chip on a peripheral edge of a base metal of a blade, which comprises a socket fixed on the peripheral edge of the base metal and a support piece fixed on the back surface of the chip. , Has an L-shaped hole surrounded on all sides,
The hole extends downward from the upper surface of the socket and further extends in the direction opposite to the rotation direction of the blade, and the hole defines the space between both side surfaces of the socket and the space between the upper and lower surfaces of the portion extending in the direction opposite to the rotation direction of the blade. Are gradually narrowed toward the side opposite to the rotating direction of the blade, and the supporting piece has an L-shaped protrusion that can be inserted into the hole of the socket. Further extending to the side opposite to the rotation direction of the blade, the projection has a distance between both side surfaces thereof and a distance between the upper and lower surfaces of the portion extending on the side opposite to the rotation direction of the blade are both the rotation direction of the blade. It is formed so that the width gradually narrows toward the opposite side, and when the protrusion is inserted into the hole of the socket and moved to the side opposite to the rotation direction of the blade, the narrowed part of the socket Formed to fit the narrowed part of the hole The blade tip mounting structure is characterized by being provided.