JP5658950B2 - Folding cane - Google Patents

Description

  The present invention relates to a folding cane suitable for use in trail running (mountain marathon), hiking, walking, walking, and the like, and in particular, a plurality of pipe shafts are connected by a one-touch operation to form a single cane of a predetermined length. The present invention relates to a folding cane that can be assembled and can be folded into a plurality of pipe shafts by a simple operation.

  As a 1st example of the conventional folding cane, there exists a thing as described in patent document 1, for example. Patent Document 1 describes a telescopic multi-stage telescopic cane that can be adjusted in length. The multistage telescopic cane described in Patent Document 1 (hereinafter referred to as “first conventional example”) is a combination of a plurality of large and small diameter metal tube pairs that are inserted and slid in the axial direction to form a plurality of stages. The telescopic connection pipe is configured, and when used, the lock pin that is biased outwardly in the small-diameter pipe is pushed into the small-diameter pipe to release the position lock and the small-diameter pipe can be slid into the large-diameter pipe. ing. In addition, each combination of pipe pairs that slide relative to each other has a concave joint in one pipe and a convex joint in the other pipe, and at least the convex joint of both joints is radially approximately along the axial direction. It has a plurality of slits in the interval and is formed flexibly in the omnidirectional radial direction, and in a state where it is stored in a reduced scale when not in use, the concave joint and the convex joint should be fitted and connected to each other. It is composed and characterized.

  Moreover, there exists a thing as described in patent document 2 as a 2nd example of the conventional folding stick. Patent Document 2 describes a stick having two types of different length adjusting mechanisms in the shaft portion. The walking stick described in Patent Document 2 (hereinafter referred to as “second conventional example”) has a grip portion, a shaft portion, and a stone bump, and the shaft portion is divided into a plurality of stages of at least three or more stages. It is composed of an upper shaft having a diameter, an intermediate shaft having a medium diameter, and one or a plurality of lower shafts having a small diameter. Further, the first length adjusting mechanism provided in the first fitting portion of the upper shaft and the middle shaft is different from the length adjusting mechanism provided in the fitting portion of each shaft below the middle shaft. Yes.

Utility Model Registration No. 3158936 JP 2001-46128 A

  However, in the case of the first conventional example described above, the four shafts are configured to be nested, and compared to the outer diameter of the upper shaft with the handle, the stone is located on the opposite side. The outer diameter of the lower shaft with a protrusion was extremely thin. Therefore, there is a problem that the strength on the lower shaft side is weaker than the strength on the upper shaft side, and it is difficult to increase the strength of the cane over the entire length. In addition, a pin-lock type locking mechanism is provided at each joint that connects the inner and outer shafts. When this cane is retracted to the shortest length, all the locking mechanisms must be individually released. Therefore, there is a problem that the workability at the time of adjusting the length is poor because the small-diameter shaft must be accommodated in the large-diameter shaft.

  Further, in the case of the second conventional example, the three shafts are configured to be nested and compared with the outer diameter of the upper shaft with the handle, as in the case of the first conventional example. Therefore, the outer diameter of the lower shaft with the stone bump located on the opposite side was extremely thin. Therefore, there is a problem that the strength on the lower shaft side is weaker than the strength on the upper shaft side, and it is difficult to increase the strength of the cane over the entire length. Furthermore, a stepless adjustment mechanism was provided between the upper shaft and the middle shaft, a multistage adjustment mechanism was provided between the middle shaft and the small shaft, and a length adjustment mechanism was provided at each joint portion. . Therefore, the length adjustment of the entire cane is complicated, and there is a problem that workability at the time of length adjustment is poor.

  The problem to be solved is that, in the conventional technique as described above, a plurality of shafts are housed in a nested manner to adjust the length of the cane. Therefore, the strength of the lower shaft side (stone thrust side) is weaker than the strength of the upper shaft side (handle side), and it is difficult to make the strength of the cane large and substantially uniform over the entire length. It is. In addition, a lock mechanism is provided at each joint portion connecting the inner and outer shafts, and length adjustment and disassembly work cannot be performed unless all the lock mechanisms are individually operated.

According to the present invention, a plurality of pipe shafts that can constitute a single rod by connecting them in the axial direction, an axial hole penetrating the rod in the axial direction, and one end thereof at one end in the axial direction of the rod An operating string supported by the proximal pipe shaft that is disposed and the other end supported by the distal pipe shaft that is disposed at the other axial end of the rod, and a pulling operation of the operating string that is provided in the axial hole And an attachment / detachment operation mechanism that enables attachment / detachment operation of a plurality of pipe shafts. The plurality of pipe shafts have either one of a connection convex portion or a connection concave portion that can be engaged with each other at one end or both ends in the axial direction connected to another pipe shaft. Further, the attaching / detaching operation mechanism includes a fixed cam cylinder having a guide groove fixed in the axial hole of the proximal end side pipe shaft and extending in the axial direction on the inner peripheral surface, and rotatable in the operating string and in the axial direction. A rotating camshaft having a first guide protrusion that is supported so as to be movable to the guide and slidable in the guide groove, and is supported by the operating string so as to be rotatable and movable in the axial direction, and slides in the guide groove. A slide cylinder shaft having a possible second guide protrusion, and an elastic member that urges the slide cylinder shaft toward the rotating cam shaft, and the first guide protrusion and the second guide protrusion are: The most important feature is that the fixed cam cylinder is provided with a recess in which the distal end of the first guide protrusion on the side of the slide cylinder shaft is detachably engaged within the overlapping range. Features.

  According to the present invention, a single cane having a predetermined length can be assembled by connecting a plurality of pipe shafts by a one-touch operation by pulling one operating string. In addition, by a simple operation of pulling the operation string, it is possible to divide and fold one rod into a plurality of pipe shafts only by applying the weight of the pipe shaft or a small tensile force.

It is a general-view figure of the assembly state of the folding cane of this invention. It is the center longitudinal cross-sectional view which cut the folding cane shown in FIG. 1 along the axial direction. It is explanatory drawing which divided | segmented the folding cane shown in FIG. 1 into four pipe shafts. It is sectional drawing to which the P section shown in FIG. 2 was expanded. It is a side view which shows the assembly state of a rotation cam shaft, a slide cylinder shaft, etc. of the attachment / detachment operation mechanism concerning the folding cane of this invention. FIG. 6A is a perspective view, FIG. 6B is a front view, FIG. 6C is a plan view, and FIG. 6D is a cross-sectional view taken along the line TT of FIG. 6B. is there. FIG. 7A is a perspective view, FIG. 7B is a front view, FIG. 7C is a plan view, and FIG. 7D is a cross-sectional view taken along the line U-U in FIG. 7B. is there. FIG. 8A is a perspective view, FIG. 8B is a front view, FIG. 8C is a plan view, and FIG. 8D is a sectional view taken along line VV in FIG. 8B. is there. FIG. 9A is a perspective view, FIG. 9B is a front view, and FIG. 9C is a plan view, illustrating a cap member of an attachment / detachment operation mechanism according to the folding cane of the present invention. It is a perspective view which shows the bush of the attachment / detachment operation mechanism which concerns on the folding cane of this invention. FIG. 11A is a cross-sectional view taken along the line WW in FIG. 4, FIG. 11B is a cross-sectional view taken along the line XX in FIG. 4, and FIG. 11C is a cross-sectional view taken along the line YY in FIG. FIG. 11D is a sectional view taken along line ZZ in FIG. 4. It is sectional drawing to which the S section shown in FIG. 2 was expanded. FIGS. 13A and 13B illustrate the operation of the attachment / detachment operation mechanism according to the folding cane of the present invention, FIG. 13A shows the initial position of the attachment / detachment operation mechanism, and FIG. 13B shows the first guide protrusion of the rotating cam shaft is the guide groove of the fixed cam cylinder FIG. 13C shows a state where the first guide protrusion of the rotating cam shaft and the second guide protrusion of the slide cylinder shaft are slidably engaged with the guide groove of the fixed cam cylinder. Is the initial state where the first guide protrusion of the rotating cam shaft is detached from the guide groove of the fixed cam cylinder, and FIG. 13E shows that the first guide protrusion of the rotating cam shaft is released from the guide groove of the fixed cam cylinder and rotates. FIG. 13F is an explanatory diagram showing the locked state of the attaching / detaching operation mechanism. It is explanatory drawing which shows the handle which concerns on the folding cane of this invention.

  Hereinafter, the example of the form which implements the folding stick of the present invention is explained with reference to drawings. The present invention is not limited to the folding cane 1 shown in this embodiment.

  The folding cane 1 shown in FIGS. 1 to 3 is suitable for use in trail running (mountain marathon), hiking, walking, walking, and the like. The main feature of the folding cane 1 is that a plurality of pipe shafts can be connected by a one-touch operation to assemble a cane of a predetermined length, and can be divided into a plurality of pipe shafts by a simple operation. It can be folded.

  As shown in FIGS. 1 to 3, the folding cane 1 is composed of four pipe shafts 2, 3, 4, 5, one operating string 6, a handle 7, a stone thrust 8, and the like. . The number of pipe shafts required for one cane is not limited to four shown in this embodiment, but may be five or more, or may be three or two. The four pipe shafts 2 to 5 have the same outer diameter and wall thickness, and the lengths are also set to be substantially the same. However, the fourth pipe shaft 5 which is the tip side pipe shaft to which the stone bump 8 is attached at one end is tapered from the middle in the axial direction to one side, and the stone bump is formed at the tapered tip. 8 is attached.

  Of the four pipe shafts 2 to 5, a handle 7 is attached to the first pipe shaft 2, which is the proximal end side pipe shaft. A second pipe shaft 3 is detachably connected to the first pipe shaft 2, a third pipe shaft 4 is detachably connected to the second pipe shaft 3, and a third pipe shaft 4 is connected to the third pipe shaft 4. The fourth pipe shaft 5 is detachably connected. In order to secure such a connection state between the pipe shafts 2 to 5, a connection recess 2 a is provided on one side in the axial direction of the first pipe shaft 2, and one side of the second pipe shaft 3 is provided on one side. A connection recess 3a is provided and a connection projection 3b is provided on the other side, a connection recess 4a is provided on one side of the third pipe shaft 4, and a connection projection 4b is provided on the other side; and A connecting projection 5b is provided on one side of the fourth pipe shaft 5.

  The connection recess 2a of the first pipe shaft 2, the connection recess 3a of the second pipe shaft 3, and the connection recess 4a of the third pipe shaft 4 are obtained by using the holes of the pipe shafts 2 to 4 as they are. Connection recesses 2a to 4a are formed. On the other hand, the connection convex part 3b of the second pipe shaft 3, the connection convex part 4b of the third pipe shaft 4, and the connection convex part 5b of the fourth pipe shaft 5 are holes of the pipe shafts 2 to 4. The connecting projections 3b to 5b are formed by attaching the connecting shaft 9 to the shaft. A chamfered portion 9a having a relatively large chamfer is provided at the tip of each connection convex portion 3b to 5b in order to facilitate engagement and disengagement with the connection concave portions 2a to 4a.

  As shown in an enlarged view in FIG. 12, the connection shaft 9 forming the connection protrusions 3b to 5b is formed as a sleeve-like member provided with an axial hole 11 penetrating in the axial direction at the center. On the outer peripheral surface of the connecting shaft 9, a flange portion 9 b that extends outward in the radial direction is provided in the middle portion in the axial direction. The outer diameter of the shaft portion on one side from the flange portion 9b of the connecting shaft 9 is formed to be slightly larger than the outer diameter on the side with the chamfered portion 9a, and the large-diameter shaft portion is formed in the holes of the pipe shafts 2 to 4. The connecting shaft 9 is fixed to the pipe shafts 2 to 4 by press-fitting, and is integrally formed. On the other hand, the outer diameter of the shaft portion on the other side from the flange portion 9b of the connecting shaft 9 is formed to be slightly smaller than the hole diameter of the pipe shafts 2 to 4, so that the pipe shafts 2 to 4 can be taken in and out of the holes. It is relatively easy to do.

  As a material for the four pipe shafts 2 to 5 and the connecting shaft 9, an aluminum alloy is suitable. However, these materials are not limited to the aluminum alloy of this embodiment. For example, stainless steel, steel steel and the like can be used, and ABS (acrylonitrile) can be used as long as it has sufficient strength. -Butadiene / styrene resin), PC (polycarbonate), POM (polyacetal) and other various engineering plastics, CFRP, FRP, and the like can also be used.

  The stone bump 8 attached to the tip of the fourth pipe shaft 5 is the same as that conventionally used. The stone thrusting body 8 includes a stone thrusting body 12 that is press-fitted and fixed to the distal end of the pipe shaft 5, a rubber portion 13 that is integrally provided on the distal end side of the stone thrusting body 12, and a base of the stone thrusting body 12. The resin ring 14 is rotatably supported on the end side.

  As shown in FIG. 2 etc., the operation string 6 is inserted into the holes of the four pipe shafts 2 to 4. The operation string 6 passes through the holes of the first to third pipe shafts 2 to 4 and the holes of the first and second connection convex portions 3b and 4b and passes through the holes of the third connection convex portion 4b. 4 is inserted into the hole of the pipe shaft 5. In the hole of the fourth pipe shaft 5, it is elastically supported so as to be movable in the axial direction within a predetermined range. As the material of the operation string 6, for example, “Kevlar (registered trademark of DuPont)” (aromatic polyamide-based resin) is suitable, but other synthetic resin strings, fiber strings, and the like can also be used. .

  The length of the operation string 6 is approximately the same as the entire length of the folding cane 1. Further, the thickness of the operation string 6 is set to a thickness that can sufficiently withstand the force of pulling operation when the folding cane 1 is assembled and disassembled. As shown in FIG. 12, a retainer 15 for preventing the removal is integrally fixed to one end of the operation string 6 by a fixing means such as crushing or caulking. A spring receiving bush 16 is attached to the inside of the fixture 15, and a coil spring 17 is interposed between the spring receiving bush 16 and the connecting shaft 9 that forms the connecting projection 5 b of the fourth pipe shaft 5. ing.

  The spring receiving bush 16 has a cylindrical shaft portion 16a having a hole through which the operation string 6 passes, and a flange portion 16b provided at one end in the axial direction of the cylindrical shaft portion 16a and developed radially outward. ing. One end of the coil spring 17 is seated on one surface of the flange portion 16 b, and the other end of the coil spring 17 is seated on one surface of the connection shaft 9. The spring receiving bush 16 is biased toward the fixture 15 by the spring force of the coil spring 17.

  As shown in FIG. 2 and the like, the four pipe shafts 2 to 4 can be attached and detached by pulling the operation string 6 at the end opposite to the connection recess 2a in the hole of the first pipe shaft 2. The attaching / detaching operation mechanism 20 is provided. The attachment / detachment operation mechanism 20 includes a rotary cam shaft 21, a slide cylinder shaft 22, a spring receiving ring 23, a coil spring 24, a fixed cam cylinder 25, a cap member 26, and the like.

  The rotating cam shaft 21 has a configuration as shown in FIGS. That is, the rotating cam shaft 21 includes a cylindrical cam shaft main body 27 having a central hole 27 a and three first guide protrusions 28 provided integrally with the cam shaft main body 27. The three first guide protrusions 28 are arranged at equal intervals in the circumferential direction of the camshaft main body 27, and extend linearly in the axial direction in parallel with each other. On one side in the axial direction of the camshaft main body 27, a small diameter portion 27b having a smaller outer diameter than the other portions is provided. The three first guide protrusions 28 are formed to protrude radially outward from the outer peripheral surface of the camshaft main body 27. Further, one end portion in the axial direction of the three first guide protrusions 28 protrudes toward the small diameter portion 27b, and the tip end portion 28a is formed in a wedge shape by inclining one side. . On the other hand, the other ends of the three first guide protrusions 28 are accommodated in the camshaft main body 27.

  The slide cylinder shaft 22 has a configuration as shown in FIGS. That is, the slide tube shaft 22 includes a cylindrical tube shaft main body 31 having a central hole 32 and three second guide protrusions 33 provided integrally with the tube shaft main body 31. The three first guide protrusions 33 are arranged at equal intervals in the circumferential direction of the cylindrical shaft main body 31 and extend linearly in the axial direction in parallel with each other. On one side in the axial direction of the cylindrical shaft main body 31, an uneven portion 34 that is slidably contacted with the three first guide protrusions 28 of the rotating cam shaft 21 so as to be engaged and disengaged is provided. The concavo-convex portion 34 is composed of six V-shaped notches in which triangular shapes formed in a triangle are continuous in the circumferential direction, and three first guide protrusions 28 are opened one by one, and three portions are simultaneously engaged. Is possible.

  As shown in FIG. 7C, the three second guide protrusions 33 with respect to the uneven part 34 are arranged such that one side surface of the three second guide protrusions 33 has an axis and an axis of the triangular mountain of the uneven part 34. It is rotationally shifted in the circumferential direction so as to be parallel to the direction. Thus, by shifting the second guide protrusion 33 in the circumferential direction with respect to the concavo-convex portion 34, the slide barrel shaft 22 rotates to the rotary cam shaft 21 when the operation string 6 is operated, as will be described later. It is configured to generate a force in the direction. In addition, the center hole 32 of the slide cylinder shaft 22 is provided with an inner flange portion 35 protruding inward in the radial direction at an intermediate portion in the hole direction. By providing the inner flange portion 35, the middle diameter portion 32 a on the concave and convex portion 34 side and the large diameter portion 32 b on the opposite side are set in the central hole 32.

  As shown in FIGS. 4 and 5, the small diameter portion 27 b of the rotary cam shaft 21 is slidably fitted to the middle diameter portion 32 a of the slide cylinder shaft 22. A part of the coil spring 24 and the spring receiving ring 23 is inserted into the large diameter portion 32 b of the slide cylinder shaft 22. As shown in FIG. 10, the spring receiving ring 23 is provided at one end in the axial direction of the cylindrical shaft portion 23a having a hole through which the operation string 6 passes, and is deployed radially outward. And a flange portion 23b. One end of the coil spring 24 is seated on one surface of the flange portion 23b, and the other end of the coil spring 24 is seated on the end surface of the inner flange portion 35 on the large diameter portion 32b side. The slide cylinder shaft 22 is biased toward the rotating cam shaft 21 by the spring force of the coil spring 24.

  In order to position the slide cylinder shaft 22 and the rotating cam shaft 21 urged by the spring force of the coil spring 24 at predetermined positions, two positioning fixtures 37 and 38 are spaced at predetermined positions on the operating string 6. Is fixed. The rotating cam shaft 21 is urged against the first positioning fixture 37 by the spring force of the coil spring 24. Further, the spring receiving ring 23 is biased by the spring force of the coil spring 24 to the second positioning fixture 38. At this time, as shown in FIG. 5, a gap Q is set between the slide cylinder shaft 22 side and the spring receiving ring 23 side, and within the range of this gap Q, the slide cylinder shaft 22 side and the spring receiver are set. The ring 23 side can move relatively in the axial direction.

  In order to restrict the operations of the rotating cam shaft 21 and the slide cylinder shaft 22, a fixed cam cylinder 25 is provided on the first pipe shaft 2. The fixed cam cylinder 25 has a configuration as shown in FIGS. That is, the fixed cam cylinder 25 has a cylindrical shaft portion 25a having an outer diameter that fits in the hole of the first pipe shaft 2, and an outer flange portion 25b provided at one end in the axial direction of the cylindrical shaft portion 25a. ing. A central hole 29 that penetrates the cylindrical shaft portion 25a of the fixed cam cylinder 25 in the axial direction has an inner diameter in which the rotating cam shaft 21 and the slide cylinder shaft 22 are movably fitted. The fixed cam cylinder 25 is supported on the opposite side to the outer flange portion 25a so as to be linearly movable only in the axial direction while preventing the rotation cam shaft 21 and the slide cylinder shaft 22 from rotating in the circumferential direction. Three guide grooves 41 to 41 are provided.

  As shown in FIGS. 8A and 8B, the three guide grooves 41 to 41 of the fixed cam cylinder 25 are arranged at equal intervals in the circumferential direction, and extend linearly in the axial direction in parallel with each other. Has been. In the three guide grooves 41 to 41, three first guide protrusions 28 to 28 of the rotating cam shaft 21 and three second guide protrusions 33 to 33 of the slide cylinder shaft 22 can be taken in and out, respectively. Sliding contact. Therefore, a V-shaped lead-in portion 43 is formed in the opening portion on the opposite side to the outer flange portion 25a of the land portion 42 forming the three guide grooves 41 to 41 so as to be easily accessible from either side in the circumferential direction. Is provided.

  Further, on the opposite side of the guide portion 43 of the land portion 42 of the fixed cam cylinder 25, a lock recess 44 is provided for removably engaging the tip portion 28a to lock the rotating cam shaft 21. The lock recess 44 is formed of a wedge-shaped recess corresponding to the wedge shape forming the distal end portion 28a of the first guide protrusion 28, and is provided at three locations at equal intervals in the circumferential direction. The engagement state between the lock recess 44 and the first guide protrusion 28 is determined by the spring force of the coil spring 24 after the first guide protrusion 28 is pushed by the slide cylinder shaft 22 and passes through the guide groove 41. The rotation camshaft 21 is rotated (about 15 degrees in this embodiment) by an external force applied in the rotation direction applied from the slide cylinder shaft 22 on the basis thereof.

  As shown in FIG. 4, a cap member 26 is attached and integrally attached to the outer flange portion 25 a of the fixed cam cylinder 25. The cap member 26 has a configuration as shown in FIGS. That is, the cap member 26 includes a cylindrical shaft portion 26a having an axial hole 46 through which the operation string 6 is penetrated, and a flange portion 26b provided at one end in the axial direction of the cylindrical shaft portion 26a and deployed radially outward. And have. Further, the opposite side of the axial hole 46 to the flange part 26b is formed as a large diameter part 46a having a diameter larger than that of the other part, and a step part 46b is set in the middle part in the axial direction. The rotating cam shaft 21 can be inserted into the large-diameter portion 46a of the axial hole 46, and the end surface of the rotating cam shaft 21 can be brought into contact with the stepped portion 46b. The camshaft 21 is prevented from coming off.

  Further, as shown in FIGS. 9A to 9C, two slit grooves 47, 47 extend in the axial direction at a predetermined interval in the diameter direction and in parallel with each other in the cylindrical shaft portion 26 a of the cap member 26. Has been provided. Thus, two elastic pieces 48, 48 having flexibility in the diametrical direction are provided on the cylindrical shaft portion 26a so as to face the position rotated and displaced by 180 degrees. A claw portion 48a that protrudes radially outward is provided at the tip of each elastic piece 48. Two engagement holes 49, 49 in which the two claw portions 48 a, 48 a are detachably engaged are provided in the cylinder shaft portion 25 a of the fixed cam cylinder 25. The cylindrical shaft portion 25a is inserted into the hole of the first pipe shaft 2, and the two claw portions 48a and 48a of the two elastic pieces 48 and 48 are engaged with the two engaging holes 49 and 49 of the cylindrical shaft portion 25a. Thus, the fixed cam cylinder 25 is fixed to the first pipe shaft 2.

  A handle 7 and a positioning member 50 for positioning the handle 7 are attached to the end of the first pipe shaft 2 on the side where the fixed cam cylinder 25 is fixed. The positioning member 50 is formed of a cylindrical member that is slidably fitted to the first pipe shaft 2, and is provided with a band tightening mechanism 51 that can be fixed by tightening the shaft at an arbitrary position in the axial direction. ing.

  The handle 7 is made of a rod-like member having an outer shape that can be easily grasped by a hand, and a fitting hole 54 into which an internal cylinder 55 fixed to the positioning member 50 is inserted is provided at the center thereof. The first pipe shaft 2 is detachably fitted in the hole of the inner cylinder 55. Further, the handle 7 is provided with a through hole 56 communicating with the fitting hole 54. As shown in FIG. 14, the through hole 56 is opened to a string locking portion 57 provided at the upper end portion which is one end in the longitudinal direction of the handle 7. One end of the operation string 6 is bent and stored in the string locking portion 57 in a free state. At one end of the operation string 6, a string fixing tool 61 showing a specific example of the hump portion is fixed. The handle 7 is provided with an engagement groove denoted by reference numeral 59. The engaging groove 59 is for temporarily holding and holding the string fixing member 61 when the positioning member 50 is pushed in to shorten the position of the handle 7.

  Examples of the material of the rotating cam shaft 21, the slide cylinder shaft 22, the spring receiving ring 23, the fixed cam cylinder 25, the cap member 26, and the spring receiving bush 16 include nylon resin, ABS resin (acrylonitrile / butadiene / styrene resin), and the like. Thermoplastic resins are preferred. However, a metal such as an aluminum alloy can also be used. Moreover, as a material of the fixing tool 15 and the positioning fixing tools 37 and 38, for example, an aluminum alloy is preferable, but a copper alloy, iron, or another metal can also be used.

  The folding cane 1 having such a configuration can be manufactured, for example, as follows. First, the second positioning fixture 38 is fixed to a predetermined position of the operation string 6 cut to a predetermined length. The mounting position of the second positioning fixture 38 becomes a reference position when the folding cane 1 is assembled. Next, one side of the operation string 6 to which the second positioning fixture 38 is fixed is inserted into the holes of the spring receiving ring 23, the coil spring 24, the slide cylinder shaft 22, and the rotating cam shaft 21 in order. To do.

  At this time, the coil spring 24 is fitted to the cylindrical shaft portion 23 a of the spring receiving ring 23, one end of the coil spring 24 is brought into contact with the inner surface of the flange portion 23 b, and the other end of the coil spring 24 is connected to the slide cylindrical shaft 22. The inner flange portion 35 is brought into contact with one surface. Further, the small diameter portion 27 b of the cam shaft main body 27 of the rotary cam shaft 21 is fitted into the middle diameter portion 32 a of the central hole 32 of the slide cylinder shaft 22. Then, as shown in FIG. 4, the coil spring 24 is slightly compressed and a predetermined gap Q is set between the slide cylinder shaft 22 and the flange portion 23b. The first positioning fixture 37 is fixed.

  Next, the cap member 26 is attached to one side of the fixed cam cylinder 25. Next, the fixed cam cylinder 25 with the cap member 26 is inserted into the hole on the first pipe shaft 2 opposite to the first connection recess 2 a, and the fixed cam cylinder 25 is attached to the first pipe shaft 2. Next, one side of the operation string 6 to which the rotating cam shaft 21 and the like are attached is inserted into the hole of the first pipe shaft 2 from the first connection recess 2a side, and the tip thereof is protruded to the outside. Further, the other side of the operation cord 6 is inserted through the hole of the second pipe shaft 3 from the first connection convex portion 3b side, and protrudes to the outside from the other second connection concave portion 3a. Similarly, the other side of the operation cord 6 is inserted through the hole of the third pipe shaft 4 from the second connection convex portion 4b side, and is protruded to the outside from the other third connection concave portion 4a.

  Next, the other side of the operation cord 6 is inserted into the axial hole 11 of the third connecting shaft 9 removed from the fourth pipe shaft 5 and protruded outside from the other. Next, the coil spring 17 and the spring receiving bush 16 are sequentially attached to the protruding portion of the operation string 6. At this time, one end of the coil spring 17 is brought into contact with the end surface of the connection shaft 9, and the other end of the coil spring 17 is brought into contact with the flange portion 16 b of the spring receiving bush 16. Then, in a state where the coil spring 17 is slightly compressed and a predetermined gap R is set between the connecting shaft 9 and the spring receiving bush 16, the positioning fixture 15 is placed outside the spring receiving bush 16 of the operating string 6. Fix it. Next, the connection shaft 9 is bonded and fixed to the hole of the fourth pipe shaft 5 with an adhesive, and the third connection convex portion 5 b is formed on the fourth pipe shaft 5.

  Next, the handle 7 and the positioning member 50 are attached to the first pipe shaft 2. At this time, the end of the operation string 6 on the handle 7 side is caused to penetrate the through hole 56 provided in the handle 7 and protrude outward from the string locking portion 57. Next, a string fixing tool 61 is attached to the distal end of the operation string 6 of the operation string 6 to prevent the distal end of the operation string 6 from being pulled into the pipe shaft when the folding cane 1 is separated. Thereby, the assembly work at the time of manufacturing the folding cane 1 is completed.

  Next, the connecting operation and the separating operation of the four pipe shafts 2 to 5 when the folding cane 1 is used will be described. FIGS. 1 and 2 show a state where four pipe shafts 2 to 5 are connected to form one cane, and FIG. 3 shows that four pipe shafts 2 to 5 are separated. The folded state separated into four is shown. The folding cane 1 is in the folded state shown in FIG. 3 when not in use, and the operating string 6 is pulled to the handle 7 side from that state, so that the operating string 6 is connected to the state shown in FIG. Can do. Then, the four pipe shafts 2 to 5 connected in the axial direction are fixedly held as one wand with the operation string 6 locked by the attachment / detachment operation mechanism 20.

  First, the operation at the time of assembly in which the four pipe shafts 2 to 5 are changed to one cane will be described. FIGS. 13A to 13F illustrate the operation of the attachment / detachment operation mechanism 20 during assembly. FIG. 13A shows a free state when disassembled, and FIG. 13F shows a locked state when connected.

  In the free state at the time of disassembly shown in FIG. 13A, the slide cylindrical shaft 22 is urged toward the rotating cam shaft 21 by the spring force of the coil spring 24, and thus the three first guide protrusions 28 of the rotating cam shaft 21. ˜28 are engaged with the concavo-convex portion 34 of the slide cylinder shaft 22, and the tip end portion 28 a of each first guide protrusion 28 is located at the deepest recessed portion of each concave portion. At this time, the rotating cam shaft 21 is outside the hole of the fixed cam cylinder 25, and the three first guide protrusions 28 to 28 are located away from the three guide grooves 41 to 41 of the fixed cam cylinder 25.

  In order to connect the four pipe shafts 2 to 5 from the state shown in FIG. 13A, when the operating string 6 is pulled in the direction (upward in the drawing) from the handle 7, the state shown in FIG. The three first guide protrusions 28 to 28 of 21 enter into the three guide grooves 41 to 41 of the fixed cam cylinder 25. Thereby, each guide protrusion 28 is guided by each guide groove 41 and moves straight in the axial direction without rotating. Then, the state shown in FIG. 13B changes to the state shown in FIG. 13C.

  Between the state shown in FIG. 13B and the state shown in FIG. 13C, the three second guide protrusions 33 to 33 of the slide cylinder shaft 22 are fixed to the fixed cam cylinder following the three first guide protrusions 28 to 28. 25 of the three guide grooves 41 to 41 enter. At this time, the three second guide protrusions 33 to 33 are provided to be shifted from the three first guide protrusions 28 to 28 by a predetermined angle (about 15 degrees to 20 degrees) in the circumferential direction. Therefore, when the three second guide protrusions 33 to 33 enter the three guide grooves 41 to 41, they are rotated by the amount of the deviation.

  At this time, since the rotating cam shaft 21 is not movable in the rotation direction by the guide groove 41, the rotating cam shaft 21 is moved by the rotational displacement of the concavo-convex portion 34 based on the rotation of the slide cylindrical shaft 22. A little pulled away from. If the length from one end of the rotating cam shaft 21 to the other end of the slide cylinder shaft 22 is H2, the length H1 from one end of the rotating cam shaft 21 to the other end of the slide cylinder shaft 22 in the initial state is longer than H1. The length is increased (H2> H1), and the spring force of the coil spring 24 increases by the length difference Δ (H2−H1). This increase in the spring force becomes a force for urging the rotating cam shaft 21 toward the slide cylinder shaft 22 when locked, which will be described later.

  By further pulling the operating string 6 from the state shown in FIG. 13C, the rotating cam shaft 21 and the slide cylinder shaft 22 are brought into the state shown in FIG. 13D. And if each front-end | tip part 28a of the three 1st guide protrusions 28-28 crosses each end part of the three guide grooves 41-41, the rotating cam shaft 21 will slide by the spring force of the coil spring 24 mentioned above. It is urged toward the cylinder shaft 22 side. As a result, as shown in FIG. 13E, the slope portion of the distal end portion 28a of the first guide protrusion 28 rides on the slope portion of the lock recess 44 provided in the land portion 42 of the fixed cam cylinder 25, and the slope portion The guide protrusion 28 is guided and moves through the lock recess 44 to the valley side.

  As a result, as shown in FIG. 13F, the three first guide protrusions 28 to 28 are engaged with the three concave portions of the lock concave portion 44 to be locked. Thereby, the operation string 6 is locked, and the four pipe shafts 2 to 5 are connected, and as shown in FIGS. 1 and 2, one strong cane is secured. At this time, no tension is applied upward from the attaching / detaching operation mechanism 20 of the operation string 6, and the operation string 6 is stored in the string locking portion 57 in an unloaded state.

  Since the fixing tool 15 is provided at the end opposite to the handle 7 side of the operating string 6 and the coil spring 17 is interposed between the spring receiving bush 16 and the connection shaft 9, the operating string 6 is assembled at the time of assembly. Even when the operating force is small, the connection concave portions 2a to 4a are smoothly inserted into the connection convex portions 3b to 5b in the respective connection portions by the action of the spring force of the coil spring 17, so that they are securely fitted. be able to.

  Next, a separation operation for folding the folding cane 1 connected to one into four will be described. In this case, from the state shown in FIG. 13F, the operating string 6 is pulled further strongly, and the distal end portion 28 a of the first guide protrusion 28 is moved over the vertical wall of the lock recess 44. Thus, when the three first guide protrusions 28 to 28 of the rotating cam shaft 21 get over the vertical wall extending in the axial direction of the lock recess 44 of the fixed cam cylinder 25, the three first guide protrusions 28 to 28 move along the slope portion by the spring force of the coil spring 24 and enter the three guide grooves 41 to 41.

  As a result, the three first guide protrusions 28 to 28 and the three second guide protrusions 33 to 33 enter the three guide grooves 41 to 41, respectively. Both can be moved in the axial direction. When the operation string 6 is pulled upward, the lower projection of the pipe shaft is pulled out of the connection depression of the upper pipe shaft due to the weight of the pipe shaft located below, and is connected up to that point. The pipe shaft that was left is automatically separated. Further, when the operating string 6 is pulled in the horizontal direction with the folding cane 1 set in a horizontally long state, the pipe shafts that have been connected so far can be easily separated by pulling lightly in the directions away from each other.

  As described above, the folding cane of the present invention is not limited to the embodiment described above, and various modifications and changes can be made in the configuration, shape, material, and the like without departing from the configuration of the present invention. Needless to say. In the above-described embodiment, the example in which the coil spring is used as the elastic member has been described. However, the present invention is not limited to this, and for example, a rubber-like elastic body, a leaf spring, or the like can be used.

  1. ・ Folding cane, 2,3,4,5 ・ ・ Pipe shaft, 2a, 3a, 4a ・ ・ Connection recess, 3b, 4b, 5b ・ ・ Connection projection, 6 ・ ・ Operating string, 7 ・ ・ Handle, 8 .. Stone thrusting 9.. Connection shaft 15.. Fixing device 16.. Spring receiving bush 17.. Coil spring 20.. Detachment operation mechanism 21. Shaft, 23 ... Spring receiving ring, 24 ... Coil spring (elastic member), 25 ... Fixed cam cylinder, 26 ... Cap member, 27 ... Cam shaft body, 28 ... First guide ridge, 28a ..Tip portion 31 ..Cylinder shaft main body 33 .Second guide protrusion 34 ..Uneven portion 37, 38 ..Positioning fixture 41 ..Guide groove 42 ..Land 44 ..Lock recess, 57..String locking part, 58. 59 .. Engagement groove 61.. String fixing tool (cove part)

Claims (4)

A plurality of pipe shafts capable of constituting a single rod by connecting them in the axial direction;
The rod is inserted into an axial hole that penetrates the rod in the axial direction, and one end is supported by a proximal pipe shaft disposed at one end in the axial direction of the rod, and the other end is at the other axial end of the rod. An operation string supported by the arranged pipe shaft on the distal end side;
An attachment / detachment operation mechanism that is provided in the axial hole and enables the attachment / detachment operation of the plurality of pipe shafts by a pulling operation of the operation string,
Wherein the plurality of pipes shaft in the axial direction of one or both ends to be connected to another pipe shaft, possess either engageable with connection projections or connection recess each other,
The attachment / detachment operation mechanism includes:
A fixed cam cylinder having a guide groove fixed in the axial hole of the proximal pipe pipe and extending in the axial direction on the inner peripheral surface;
A rotating camshaft having a first guide protrusion that is supported by the operation string so as to be rotatable and movable in the axial direction and is slidable in the guide groove;
A slide cylinder shaft having a second guide protrusion which is supported by the operation string so as to be rotatable and movable in the axial direction and is slidable in the guide groove;
An elastic member that urges the slide cylinder shaft toward the rotating cam shaft,
The first guide protrusion and the second guide protrusion are provided by appropriately shifting the angle in the circumferential direction within a range where they overlap each other,
A folding cane characterized in that a concave portion in which a tip of the first guide protrusion on the slide cylinder shaft side is detachably engaged is provided in the fixed cam cylinder . The tip end portion of the first guide protrusion on the slide tube shaft side is composed of a wedge-shaped convex portion inclined to one surface side,
An uneven portion in which chevron-shaped unevenness on which the wedge-shaped convex portion is slidably contacted so as to be engageable and disengageable is provided in the circumferential direction in the slide camshaft side is provided. Item 1. A folding cane according to item 1 . The coil spring that generates an urging force so as to press the adjacent pipe shaft against the fitting side at the time of the pulling operation of the operation string is provided at the end of the distal end side pipe shaft of the operation string. Folding cane as described. Provide a handle to be attached to the proximal pipe shaft,
The folding cane according to claim 1, wherein the handle is provided with a stop groove that is detachably engageable with a bump provided at a tip of the operation string.

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