JP2015097783A - Ferrule for cane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ferrule for a cane, a ferrule that can be simply and inexpensively manufactured using an elastic member and that has an excellent slip-resistance against the floor or the like by having a plurality of projections on the bottom face.SOLUTION: This is a cane ferrule 1 which has a rugged face 5 formed on a bottom face 2a of a ferrule body 2. The rugged face 5 has a plurality of projections 6 arranged with a plurality of rows formed concentrically, where the projections are polygonally arranged with spaces apart from each other in the respective rows. Also, the plurality of projections 6 have each flat tip end face 6a, and the area of each tip end face 6a expands more toward the outer periphery of a disk like member 4. Then, around these projections 6, grooves 7 are formed respectively. In other words, the plurality of projections 6 are arranged in the form of a cobweb with spaces apart from each other. In addition, in the plurality of projections 6, all tip end faces 6a are arranged on the same plane. A corner part 6c is formed by the tip end face 6a and the end face 6b in each projection 6.

Description

  The present invention relates to a cane thruster made of an elastic member, and more particularly to a cane thruster provided with a plurality of protrusions on a bottom surface.

First, a conventional walking stick for canes will be described with reference to FIG.
As shown in FIGS. 4 (a) and 4 (b), a cane butt 100 made of an elastic member has a stone piercing barrel 101 formed in a substantially truncated cone shape, and a columnar member 102 at the lower end thereof. The stone thrusting drum portion 101 and the plurality of ribs 103 provided so as to extend over the columnar member 102 are integrally formed. A cane shaft 106 is fitted into the opening 101 a of the stone thrusting body 101. A bottom surface 102a of the cylindrical member 102 is a landing surface, and a circular grounding surface 104a and annular grounding surfaces 104b and 104c are provided concentrically from the grounding surface 104a toward the outer periphery in the center.
Grooves 105a and 105b are formed between the ground planes 104a to 104c, respectively. According to the cane butt 100 having such a configuration, the bottom surface 102a is difficult to slip due to friction between the ground contact surfaces 104a to 104c and the ground, and thus it is possible to prevent the user from falling.
However, since the diameters of the bottom surface 102a and the shaft 106 are both approximately 1.0 to 1.5 cm and are substantially equal, there is a problem that the cane is inclined and lacks stability. Furthermore, since the total area of the ground contact surfaces 104a to 104c is small, there is a problem that the generated frictional force is small and it is difficult to reliably prevent the bottom surface 102a from slipping.
Therefore, in recent years, research and development have been conducted on cane thrusters having a large contact area for the purpose of improving the stability of the cane, and some inventions and devices have already been disclosed in this regard. .

For example, Patent Document 1 discloses an invention relating to a cane tip elastic member and a walking stick attached to the lower end of the shaft of the cane under the name “cane tip elastic member and walking cane”.
In the invention disclosed in Patent Document 1, three or more first protrusions are formed at positions near the outer edge of the bottom surface of the cane tip elastic member and outside the shaft mounting position of the cane. A second protrusion is formed at the center.
In the tip elastic member for walking sticks and the walking stick having such a structure, three or more first protrusions are formed. Therefore, by sufficiently increasing the mutual distance and the distance from the second protrusions. The cane is stably grounded. Further, the first protrusion functions also as a slip stopper. Therefore, it is possible to prevent falls during walking, and safety can be improved.

Next, Patent Document 2 discloses a device related to a cane-like wand having a disk shape under the name “wand-like wand”.
The device disclosed in Patent Document 2 is made of a hard synthetic resin, and includes a mounting portion that can be attached to the lower end portion of the cane and a disk-shaped stone thrusting portion that is connected to the lower portion via a universal joint. A non-slip member made of a hard elastic material such as a rubber shoe sole having a large number of protrusions or uneven surfaces is attached to the lower surface.
In the stabbing of a cane having such a structure, it is possible to prevent a wide disc-shaped stabbing from fitting into a soft road surface or a gap such as a gravel road. Furthermore, the anti-slip projections are in contact with the entire surface of the road regardless of the inclination angle of the cane by the swinging action of the universal joint. Therefore, the operability and stability of the cane can be improved.

JP 2006-130138 A Registered Utility Model No. 3138059

  In the invention disclosed in Patent Document 1, since the plurality of first protrusions are arranged at intervals, only one first protrusion is grounded and an inclined load is applied. In this case, the cane is easily inclined with the grounded first protrusion as a fulcrum. Furthermore, since the first protrusion is formed in a dot shape and its ground contact area is small, there is a possibility that the function as an anti-slip is not sufficiently exhibited. Therefore, the safety of the cane may not be ensured.

  Next, in the device disclosed in Patent Document 2, since the stone thrusting portion is made of a hard synthetic resin, the stone thrusting portion is not deformed flexibly. For this reason, when landing on a protruding object such as a stone or a piece of wood, there is a possibility that the stone protrusion will incline and rise, and only a part of the anti-slip protrusion will contact the road. Therefore, it is conceivable that the cane is excessively inclined in an unexpected direction or the stone thrusting part slips, and the operability and stability of the cane may not be sufficient. Moreover, since it consists of an attachment part, a universal joint, and a non-slip | skid member, compared with the cane thruster 100 (refer FIG. 4) which concerns on a prior art, there are many parts counts and manufacturing cost may increase. .

  The present invention has been made in response to such a conventional situation, and can be easily and inexpensively manufactured using an elastic member, and is provided with a plurality of protrusions on the bottom surface, thereby being resistant to slipping on the floor surface and the like. An object of the present invention is to provide a stick for a cane having good properties.

In order to achieve the above object, a walking stick for a cane according to the first aspect of the present invention is a walking stick for a cane made of an elastic member having an uneven surface formed on the bottom surface of the stone protrusion body, and the uneven surface has a cross section. Is characterized in that a plurality of protrusions having corners are arranged radially.
In the wand wand having such a structure, the pit butt main body and the plurality of protrusions are integrally formed from an elastic member. In addition, “radial” means that a plurality of protrusions are distributed over the entire bottom surface of the stone thrusting body in a planar shape such as a spider web or a spiral. The stone thrusting body is attached to the cane so that its central axis coincides with the long axis of the cane.
In the walking stick with the above structure, when a plurality of protrusions are pressed against a floor surface or the ground (hereinafter referred to as a floor surface or the like), a frictional force is generated on the surface where the protrusions contact the floor surface or the like. That is, the protrusion acts as a slip stopper. In addition, since the plurality of protrusions are distributed in a plane shape over the entire bottom surface of the stone bump main body, the total ground contact area between the protrusions and the floor surface is increased, and a strong frictional force is applied to the entire bottom surface of the stone bump main body. Will occur. Such frictional force reflects the slip resistance of the cane butt.
Furthermore, since the plurality of protrusions have corners in cross section, the corners scratch the floor surface or the like (edge effect), and thus the frictional force is increased. Sex is enhanced. In addition, although a corner | angular part makes a substantially right angle, it is not necessarily limited to a right angle.
In addition, since a groove is formed between each of the plurality of protrusions, moisture present on the surface such as the floor is drained through these grooves.

Subsequently, according to a second aspect of the present invention, there is provided the walking stick according to the first aspect, wherein the plurality of protrusions are arranged concentrically in a plurality of rows and spaced from each other in each row. It is arranged in a polygonal shape.
In the cane butt having such a structure, in addition to the operation of the first aspect of the invention, an edge effect is also generated at the edge portions facing each other at intervals in each row. Therefore, the plurality of protrusions exhibit slip resistance in almost all directions along the floor surface.

Subsequently, the invention according to claim 3 is the stone thruster for canes according to claim 1 or claim 2, wherein the stone thruster body is formed in a columnar or frustum-shaped stone thruster and a lower end thereof. A disk-shaped member having an uneven surface is provided, and the diameter of the disk-shaped member is larger than the diameter of the boundary with the stone thrusting body.
In the stick thruster with such a structure, in addition to the action of the invention according to claim 1 or 2, the diameter of the disk-shaped member is larger than the diameter of the boundary part with the stone thrusting body part. For this reason, when the cane lands on the floor surface or the like, the peripheral edge of the disk-shaped member made of an elastic member is bent. At this time, since the restoring force that tries to return to the state before bending acts on the peripheral portion, further tilting of the cane is suppressed.

Subsequently, in the invention according to claim 4, in the cane thruster according to claim 3, the plurality of protrusions arranged on the uneven surface are arranged in a plurality of rows concentrically, and The outer peripheral diameter of the protrusions arranged on the outermost periphery of the row is larger than the outer peripheral diameter of the stone thrusting trunk.
In the cane butt having such a structure, a plurality of protrusions are arranged on the outer side of the outer periphery of the stone butt trunk. That is, a protrusion is also provided on the periphery of the disk-shaped member.
Therefore, in the stone stick for a cane having the above structure, in addition to the action of the invention according to claim 3, even when only the peripheral edge of the disk-like member is grounded to the floor surface or the like, the protruding portion is the floor surface or the like. , And the slide of the stick for a cane from the floor is suppressed.

Subsequently, the invention according to claim 5 is the cane thruster according to any one of claims 1 to 4, wherein the plurality of protrusions are arranged such that all the tip surfaces are on the same plane. It is characterized by that.
In the stabbing stick with such a structure, in addition to the action of the invention according to any one of claims 1 to 4, when the cane lands perpendicularly to a flat floor surface or the like, The state where the tip surface is in close contact with the floor surface and the cane is vertically grounded is maintained. That is, the state where the frictional force generated on the cane butt and the floor surface is exerted to the maximum is maintained. Further, since the plurality of protrusions are made of an elastic member, when the cane is inclined and landed, or when the floor surface is inclined, the grounded protrusions contract and the remaining tip surface that is not grounded Easy to adhere to the floor. Therefore, it is easy to maintain the state in which the frictional force is maximized as described above.

  As described above, according to the stone thruster for canes according to claim 1 of the present invention, a strong frictional force is generated on the entire bottom surface of the stone thrusting body, and the unevenness is caused by the edge effect and drainage of the plurality of protrusions. Even if the floor surface is slippery or has a wet floor, the cane can be reliably prevented from slipping, and safety during use can be ensured.

  According to the cane thruster of the second aspect of the present invention, in addition to the effect of the first aspect of the invention, the slip resistance is exhibited in almost all directions along the floor surface. Even when the vehicle is landed at an inclination or when the floor surface is inclined, the cane can be prevented from slipping uniformly.

  According to the third aspect of the present invention, in addition to the effect of the first or second aspect, the cane is further inclined by the restoring force of the peripheral portion of the disk-shaped member. Is suppressed, so that the operability and stability of the cane are improved.

  According to the fourth aspect of the present invention, in addition to the effect of the third aspect of the invention, the protrusion provided on the peripheral edge of the disk-shaped member grips the floor surface or the like. The protrusions thus made can reliably support the load of the user. Therefore, it is possible to prevent the cane from slipping when the cane is landed or pushed out, and it is possible to assist the walking in a stable manner.

  According to the cane thruster of the fifth aspect of the present invention, in addition to the effect of the invention according to any one of the first to fourth aspects, in addition to the inclination angle of the landing or floor surface of the cane, etc. In addition, since the state where the frictional force generated at the cane butt and the floor surface is maximized is easily maintained, the slip resistance is good both when standing and walking.

It is a side view of a cane thruster according to an embodiment. (A) is an external view which shows the bottom face of the stone stick for a cane concerning an Example, (b) is the sectional view on the AA line in (a). (A) thru | or (c) is a schematic diagram for demonstrating the effect | action of the cane thruster for canes which concerns on an Example, respectively, (d) is a slip resistance test of the elastic member which comprises the cane thruster for canes which concerns on an Example. It is the used layout. (A) And (b) is an external view which shows the side surface and bottom face of a stone stick for a cane concerning a prior art, respectively.

A cane thruster according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 3. In addition, about the component shown in FIG. 1, the same code | symbol is attached | subjected also in FIG.2 and FIG.3, and the description is abbreviate | omitted. FIG. 1 is a side view of a cane butt according to an embodiment.
As shown in FIG. 1, the cane butt 1 of the present embodiment is made of an elastic member in which a concavo-convex surface 5 is formed on the bottom surface 2 a of the stone butt body 2. The stone thrusting body 2 includes a frustoconical stone thrusting body 3 and a disk-shaped member 4 at the lower end thereof. That is, the stone thrusting body part 3, the disk-shaped member 4, and the concavo-convex surface 5 are integrally formed. The elastic member is made of, for example, synthetic resin or natural rubber.
Further, the cane butt 1 is fixed to the tip (landing side) of the wand by inserting the shaft 11 (diameter 1.5 cm) of the wand into the opening 3 a opened at the upper end of the stone butt trunk 3. . And the diameter (D in the figure) of the disk-shaped member 4 is larger than the diameter (d in the figure) of the boundary part with the stone thrusting body part 3. FIG. The specific diameter D and diameter d are 3.5 cm and 2.5 cm, respectively. Therefore, an extended portion (H in the figure) is formed on the periphery of the disk-shaped member 4 so as to expand outward from the stone thrusting drum portion 3. The width of the extension H is (D−d) / 2, specifically 0.5 cm.
Furthermore, the concavo-convex surface 5 is composed of a plurality of protrusions 6 and a groove 7 formed between the protrusions 6.

Next, the uneven surface 5 provided on the bottom surface 2a of the cane butt 1 will be described in detail with reference to FIG. Fig.2 (a) is an external view which shows the bottom face of the stone stick for canes concerning an Example, FIG.2 (b) is the sectional view on the AA line in Fig.2 (a).
As shown in FIG. 2A, the concavo-convex surface 5 has a plurality of protrusions 6 arranged in a plurality of rows concentrically, and arranged in a polygonal shape at intervals in each row. The Each of the plurality of protrusions 6 has a flat front end surface 6 a, and the area of each front end surface 6 a increases toward the outer periphery of the disk-shaped member 4. And the groove part 7 is formed in the circumference | surroundings of these protrusion parts 6, respectively. That is, the plurality of protrusions 6 are arranged in a spider web shape with a space between each other. A circular central protrusion 8 is provided at the center of the uneven surface 5.
As shown in FIG. 2B, in the plurality of protrusions 6, all the tip surfaces 6a are arranged on the same plane. In any of the protrusions 6, a corner 6c is formed by the tip surface 6a and the end surface 6b. The angle of the corner 6c is 90 degrees. In addition, the height from the groove part 7 to the center projection part 8 is configured to be lower than the height from the groove part 7 to the end face 6b.
In addition, since the outer peripheral diameter of the protrusions 6 arranged on the outermost periphery of the disk-like member 4 is larger than the outer peripheral diameter of the stone thrusting drum part 3, the protrusions 6 are also formed on the lower edge of the expansion part H. It will be provided.

  In the cane butt 1 having the above structure, when the protrusion 6 is pressed against the floor surface or the like, a frictional force is generated between the tip surface 6a and the floor surface or the like. This frictional force reflects slip resistance. As a cause of the generation of the frictional force, it is considered that the minute unevenness existing on the surface such as the tip surface 6a and the floor surface, the edge effect by the corner portion 6c, and the like. Among these, according to the former, the frictional force increases as the contact area between the protrusion 6 and the floor surface increases.

The slip resistance will be described in more detail with reference to FIG. FIG. 3A to FIG. 3C are schematic views for explaining the action of the cane thruster according to the embodiment, and FIG. 3D constitutes the cane thruster according to the embodiment. It is the layout used by the slip resistance test of the elastic member.
As shown in FIG. 3A, when no load is applied to the protrusion 6 from above, when the tip surface 6a comes into contact with a hard surface 9 such as a floor surface, the tips of the respective minute irregularities are brought together. Touch each other. However, since the bottom surfaces do not completely contact each other, a plurality of minute spaces 10 are formed. That is, the contact area between the tip surface 6a and the surface 9 is slight.
On the other hand, as shown in FIG. 3B, when a load W is applied to the protrusion 6 from above, the protrusion 6 made of an elastic member is compressed and deformed. On the other hand, since the hard surface 9 is not deformed by the load W, the unevenness of the tip surface 6a is deformed and meshes with the unevenness of the surface 9, and the plurality of minute spaces 10 are almost disappeared. That is, the contact area between the tip surface 6a and the surface 9 increases. Thus, an increase in the contact area between the protrusion 6 and the surface 9 means that the projections and depressions on the tip surface 6a and the surface 9 mesh with each other, so that the frictional force is proportional to the contact area. It can be seen that it increases.

  Further, as shown in FIG. 3 (c), the protrusion 6 has a corner 6c. Therefore, when a lateral force (F in the figure) is applied to the protrusion 6, the corner 6c becomes a surface 9. It acts to resist the force F by being caught in the unevenness of the edge (edge effect). This resisting force (f in the figure) becomes a frictional force generated between the protrusion 6 and the surface 9.

  Next, the slip resistance of the elastic member used for the cane butt 1 will be described while showing a specific dynamic friction coefficient. This dynamic friction coefficient was measured by the following methods (1) to (4) and the arrangement shown in FIG. 3 (d) in accordance with JIS T 8101 using a dynamic friction coefficient measuring instrument.

As shown in FIG.
(1) The grounding surface g of the elastic member G was cut so as to be parallel to the measurement surface P (made of stainless steel) of the dynamic friction coefficient measuring instrument.
(2) Water-soluble oil was applied to the measurement surface P to such an extent that the lubricating oil did not run out during measurement.
(3) After making the ground contact surface g of the elastic member G face down and contacting the measurement surface P, a dynamic vertical load W = 200 (N) is applied from above the elastic member G vertically downward, and the sliding speed V = The frictional load was measured when the measurement surface P was moved horizontally at 13.2 m / min, and the numerical value was divided by the dynamic vertical load to determine the dynamic friction coefficient.
(4) The dynamic friction coefficient was measured for the present example, comparative example 1 and comparative example 2. In addition, the comparative example 1 and the comparative example 2 are the elastic members based on a prior art, respectively. Moreover, the hardness of the elastic member which concerns on a present Example, the comparative example 1, and the comparative example 2 is 54, 56, and 58, respectively. These measurement results are shown below.

  As shown in Table 1, the dynamic friction coefficient of the elastic member used for the cane thruster 1 according to this example is three times or more that of Comparative Example 1 and Comparative Example 2 when water-soluble oil is used. It was. From this, the elastic member which concerns on a present Example resulted in having the slip resistance 3 times or more of the comparative example 1 and the comparative example 2. FIG.

In the cane butt 1 according to the present embodiment, the diameter D of the disk-like member 4 is about 3.5 cm, and the plurality of protrusions 6 are distributed in a planar shape over the entire bottom surface 2a. The total ground contact area between the protrusion 6 and the surface 9 is increased, and a strong frictional force is generated on the entire bottom surface 2a. Furthermore, a stronger frictional force is generated by the edge effect of the corner 6c. In particular, since the plurality of protrusions 6 are arranged in a spider's web shape with a space between each other in the cane butt 1, the edge effect by the corner 6 c is substantially along the surface 9 with the central protrusion 8 as the center. Occurs in all directions.
Further, in the plurality of protrusions 6, all the tip surfaces 6 a are arranged on the same plane, and the disk-like member 4 is formed of an elastic member. Therefore, when a load is applied when the cane is landed with a slight inclination, when the floor surface is inclined, or when a fallen object is present on the floor surface or the like, the grounded protrusion 6 is compressed and grounded. The remaining distal end surface 6a is likely to be in close contact with the surface 9 and falling objects. Therefore, the frictional force is maximized without depending on the inclination of the cane or the floor. In addition, since the groove portions 7 are formed around the plurality of protrusions 6, even when moisture is present on the surface 9, the water is drained through these groove portions 7, and the tip surface 6 a with respect to the surface 9. Adhesion is maintained.

  Further, in the cane butt 1, the extended portion H is formed on the periphery of the disk-like member 4, and therefore when the cane lands on the floor surface or the like with a relatively large inclination, the lower portion of the extended portion H approaches the lower edge. The part of is extended and bent. Therefore, a restoring force that tries to return to the state before bending acts on the expanded portion H, and the cane is further prevented from tilting. Furthermore, since the protrusion part 6 is provided in the expansion part H, the frictional force of the front end surface 6a and the surface 9 is generated, and the sticking stick 1 for the cane is prevented from slipping from the floor surface or the like.

  As described above, according to the cane butt 1 according to the present embodiment, the total contact area between the protrusion 6 and the surface 9 is large, and the corner 6c can exhibit an edge effect. Furthermore, the elastic member used for the cane butt 1 has a slip resistance three times or more that of the elastic member according to the prior art. Therefore, the bottom surface 2a hardly slides on the floor surface or the like when the cane having the cane butt 1 is landed perpendicularly to the floor surface or the like and when it is inclined and landed. During walking, the direction of the load applied to the cane butt 1 is alternately repeated in the direction inclined with respect to the floor surface and the like. Therefore, the walking stick 1 can exhibit slip resistance at any timing of walking and ensure safety during walking. Furthermore, since the edge effect by the corner 6c occurs in almost all directions along the surface 9 with the central protrusion 8 as the center, the slip resistance when the cane is tilted in directions other than the walking direction is also good.

Moreover, since the diameter D of the disk-shaped member 4 is 3.5 cm with respect to the diameter of 1.5 cm of the shaft 11, it is suppressed by the expansion part H that a cane is inclined, Therefore Compared with the stone bump 100, the stability when the cane is landed is dramatically improved. Furthermore, since the protrusion 6 is also provided in the extended portion H, even if the cane lands on the floor surface or the like with a large inclination, it is possible to prevent a sudden slip of the cane. This is due to the fact that the area of the tip surface 6 a increases toward the outer periphery of the stone thrusting drum 3, so that the frictional force increases toward the outer periphery of the stone thrusting drum 3.
On the other hand, in the tip elastic member for a cane according to the prior art (see Patent Document 1), the first protrusions are all formed in the shape of dots having the same diameter, and the respective contact areas are small. It is difficult to think that it has a sufficient anti-skid effect. From this, compared with the prior art, the cane thruster 1 exhibits excellent safety and can reliably prevent the user from falling.

In addition, since the cane butt 1 is drained from the surface 9 through the groove portion 7, when the cane is landed on a floor surface wet with water, the cane butt 1 Slip can be prevented. On the other hand, in the cane thruster 100 according to the prior art (see FIG. 4), although the groove portions 105a and 105b are provided on the bottom surface 102a, since the ground contact surfaces 104b and 104c form an annular shape, the groove portions 105a and 105b. There was a problem that the water stored in was difficult to remove and the cane was slippery.
However, in the cane thruster 1, the problems of the prior art are sufficiently solved as described above.

  Furthermore, in the stone stick 1 for a cane, the stone stick body part 3, the disk-shaped member 4, and the uneven surface 5 are integrally formed, and the structure is simple. Therefore, it is possible to manufacture the cane butt 1 for the cane easily and inexpensively. Therefore, a large-scale supply can be performed when heading to an aging society in which the demand for canes increases. Further, since the cane butt 1 is made of an elastic member, the uneven surface 5 can be flexibly deformed according to the shape of a floor surface or a fallen object and is lightweight. Therefore, the tip surface 6a of the protrusion 6 is easy to be in close contact with the floor surface and the like, and even when the surface is not uniform, the slip resistance can be exhibited, and the operability is good for elderly people with weak power.

  Note that the cane butt of the present invention is not limited to the structure shown in this embodiment. For example, the plurality of protrusions 6 may be arranged in a spiral shape in addition to being arranged in a spider web shape as long as they are radial. Further, the angle of the corner 6c may be other than a right angle.

  The present invention can be applied as a cane stick attached to a shaft of a cane, such as a crutch or a walking stick for elderly people.

  DESCRIPTION OF SYMBOLS 1 ... Stick butt for cane 2 ... Stone butt main body 2a ... Bottom 3 ... Stone butt trunk 3a ... Opening 4 ... Disc-shaped member 5 ... Concavity and convexity 6 ... Projection part 6a ... End face 6b ... End face 6c ... Corner 7 ... groove 8 ... center protrusion 9 ... surface 10 ... space 11 ... shaft 100 ... cane thruster 101 ... stone thruster 101a ... opening 102 ... cylindrical member 102a ... bottom surface 103 ... ribs 104a-104c ... grounding surface 105a 105b ... groove 106 ... shaft

Claims (5)

A stabbing for a cane composed of an elastic member having an uneven surface formed on the bottom surface of the sarcophagus body,
The rugged surface has a plurality of protrusions each having a corner in a cross section and is arranged radially.   2. The cane butt for a cane according to claim 1, wherein the plurality of protrusions are arranged concentrically in a plurality of rows and arranged in a polygonal shape at intervals in each row. . The stone thrusting body includes a stone thrusting cylinder part formed in a columnar shape or a frustum shape, and a disk-shaped member in which the uneven surface is formed at the lower end thereof,
The diameter of this disk-shaped member is larger than the diameter of the boundary part with the said stone thrusting body part, The stone thrust for canes of Claim 1 or Claim 2 characterized by the above-mentioned.   The plurality of protrusions arranged on the uneven surface are arranged concentrically in a plurality of rows, and the outer diameter of the protrusion arranged on the outermost periphery of the plurality of rows is that of the stone thrust barrel portion. 4. The stick for a cane according to claim 3, which is larger than an outer diameter.   5. The cane thruster according to claim 1, wherein all of the tip surfaces of the plurality of protrusions are arranged on the same plane.

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