JP2021134865A - Lock nut and lock structure of joint rod - Google Patents

Abstract

To provide a lock nut capable of preventing a connection state of a pair of rod materials from being released in an undesired manner, and a lock structure of a joint rod using the lock nut.SOLUTION: A lock nut 50 is composed of a first nut 52 having a first female screw 56 formed on the inner surface and a first male screw 58 formed on the outer surface, and a second nut 54 having a second female screw 62 formed on the inner surface to screw with the first male screw 58. Then, the first female screw 56 of the first nut 52 is screwed into a rod material side male screw 24 formed at the end part of one rod material 12 of a pair of rod materials 12, 14 constituting a joint rod 10.SELECTED DRAWING: Figure 4

Description

The present invention relates to a locknut for preventing the joint rod from being erroneously released from the connected state, and a lock structure for the joint rod.

Conventionally, for example, the joint rod 1 as shown in FIGS. 5 and 6 has been used for tools and the like. The joint rod 1 includes a connecting structure 4 for connecting a pair of rod members 2 and 3 to each other. The connecting structure 4 has a substantially columnar projecting portion 5 projecting from the peripheral side surface at the end portion of one bar member 2, and a male screw portion 6 formed slightly closer to the center of the bar member 2 from the projecting portion 5. , A storage recess 7 formed at the end of the other bar 3 for accommodating the end of the one bar 2, and a protrusion 5 for accommodating the end of the one bar 2. An L-shaped notch 8, a nut 9 having a female screw screwed into a male screw portion 6, and an end face of one of the bar 2s, which are freely fitted and retracted, are internally biased. It is composed of a push rod member B urged by a spring A in a direction protruding from the end face.

The notch portion 8 has a longitudinal portion a having one end reaching the edge of the other rod 3 and extending from one end toward the central portion of the rod 3 in parallel with the longitudinal direction of the rod 3. A circumferential portion b extending in the circumferential direction of the rod member 3 from the other end of the longitudinal direction portion a, and the rod in the circumferential direction portion b from the end opposite to the longitudinal direction portion a toward one end edge of the rod member 3. It is composed of a housing portion c extending in parallel with the longitudinal direction of the material 3.

As a result, when connecting the pair of rods 2 and 3 to each other, the end portion of one rod member 2 is fitted to one end of the longitudinal portion a in the notch portion 8 so that the end portion of one rod member 2 is fitted to the other. It is fitted into the accommodating recess 7 of the rod material 3 against the urging force of the pushing rod material B, and when the protrusion 5 reaches the circumferential portion b of the notch portion 8, one rod material 2 is inserted into the other rod. It is rotated in the circumferential direction with respect to the material 3. Then, when the projecting portion 5 reaches the accommodating portion c in the notch portion 8, one bar member 2 is slightly pulled back in a direction away from the other bar member 3 by the urging force of the pushing rod member B, so that the protruding portion 5 Fits into the accommodating portion c in the notch portion 8.

By the way, although the connection of the rods 2 and 3 is almost completed up to this point, one of the rods 2 becomes the other due to the protrusion 5 being unintentionally disengaged from the accommodating portion C while using the tool or the like. There is a possibility that the rod member 3 will rotate with respect to the rod member 3 and the connected state may be undesirably released, which may be dangerous depending on the work content performed by using a tool or the like.

Therefore, when the rods 2 and 3 are connected as described above, the nut 9 is turned to move the nut 9 until it is pressed against the end edge of the other rod 3. When the movement of the nut 9 is completed, the bar 2 cannot move in the direction of the bar 3 any more, and as a result, the protrusion 5 formed on the bar 2 is rotated from the accommodating portion c in the notch 8. Since the movement to the direction portion b is restricted, one bar 2 does not rotate undesirably with respect to the other bar 3, and the connected state is prevented from being undesirably released. You can do it.

It should be noted that such a structure using a nut to prevent one member from rotating undesirably with respect to the other member is also used for a "tension bar" as described in Patent Document 1, for example. ..

Utility Model Registration No. 3176045

However, even in the conventional lock structure using the nut 9 described above, there is a problem that the nut 9 may rotate during use of a tool or the like, and as a result, the connected state may be undesirably released. rice field.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a locknut in which the connected state of a pair of rods is not undesirably released, and a joint rod using the locknut. It is to provide a lock structure.

According to one aspect of the invention
A first nut with a first female thread formed on the inner surface and a first male thread formed on the outer surface,
It is provided with a second nut on the inner surface on which a second female screw to be screwed with the first male screw is formed.
The first female screw of the first nut is provided with a lock nut that is screwed into a male screw on the rod side formed at the end of one of the pair of rods constituting the joint rod. ..

According to other aspects of the invention
A joint rod lock structure including a pair of rod members and the locknut described above.
The end portion of one of the rods is accommodated in the end of the other rod.
A protrusion projecting from the peripheral side surface of one end of the bar moves while being fitted to the peripheral side surface of the other end of the bar, and one end thereof is at the tip edge of the other bar. A longitudinal portion that has reached and extends from one end toward the central portion of the other rod, a circumferential portion that extends from the other end of the longitudinal portion in the circumferential direction of the other rod, and the circumferential portion. A notch having a housing portion extending from an end opposite to the longitudinal portion of the rod toward the tip edge of the other rod is formed.
A male screw on the bar side is formed on the peripheral side surface at the end of the bar.
With the protrusion housed in the notch, the first female screw is screwed into the male screw on the rod side in a direction in which one rod is separated from the other rod. Provided is a joint rod lock structure in which the end face of the first nut presses and urges the end face of the other rod member and the end face of the second nut presses and urges one of the rod members.

According to the locknut according to the present invention, after the pair of rods constituting the joint rod are connected to each other, the first nut screwed into the end of one rod is turned to end the other rod. Move it until it presses against the edge. Then, this time, the second nut is turned with respect to the first nut to move the second nut in the direction away from the other bar, and the direction in which one bar is separated from the other bar. Press and urge.

As a result, the lock nut maintains the distance between one bar and the other bar, so that no matter what direction force is applied while using a tool or the like to which the joint bar is applied, one of them is used. The bar moves toward the other bar, the protrusion formed on the one bar moves along the notch formed on the other bar, and one bar moves toward the other bar. It does not move undesirably with respect to the material, and it is possible to prevent the connected state from being undesirably released.

It is an external view which shows the lock structure 100 in the joint bar 10 to which this invention is applied. It is sectional drawing which shows the lock structure 100 in the joint bar 10 to which this invention was applied. It is an external view which shows the connection state of the joint rod 10 using the lock structure 100. It is sectional drawing which shows the connection state of the joint rod 10 using the lock structure 100. It is an external view which shows the connection structure 4 of the joint rod 1 which concerns on the prior art. It is sectional drawing which shows the connection structure 4 of the joint rod 1 which concerns on the prior art.

(Structure of lock structure 100 of joint rod 10)
The lock structure 100 according to the embodiment to which the present invention is applied will be described. FIG. 1 is an external view of the lock structure 100 of the joint rod 10, and FIG. 2 is a cross-sectional view of the lock structure 100.

The joint rod 10 according to the present embodiment is roughly composed of a pair of rod members 12 and 14 and a locknut 50.

The bar member 12 is a member for extending the length of the bar member 14 to which a tool or the like (not shown) is attached to the tip end portion, and is generally composed of a bar-shaped member 16 and an end member 18.

The rod-shaped member 16 is a substantially columnar member, and a tip portion (end portion) is inserted into the end member 18, and a handle (grip) such as a tool is provided at a rear end portion (not shown). There is. The shape of the rod-shaped member 16 is not limited to a substantially columnar shape, for example, it may be a prismatic member, a hollow member, or toward the tip like a fishing rod. It may have a shape that makes it thinner. In addition, there are no particular restrictions on the material. Further, the end member 18 is fixed to the rod-shaped member 16 by a plurality of fixing pins 17.

The end member 18 is a member into which the tip end portion of the rod-shaped member 16 is inserted as described above, and an insertion recess 20 into which the rod-shaped member 16 is inserted is formed at one end thereof, and the other end is formed. The portion is formed to have a diameter smaller than that of one end portion, and a pair of substantially columnar projecting portions 22 projecting from the peripheral side surface are arranged. Further, a male screw 24 on the bar side is formed on the outer peripheral surface of the end member 18 at the substantially central portion. Further, an urging member insertion hole 70 is formed in the end surface of the end member 18, and the urging member 72 is fitted in the urging member insertion hole 70 so as to be retractable. Further, an urging spring 74 is internally provided behind the urging member 72. As a result, the urging member 72 is urged in the direction of projecting from the end surface of the end member 18.

In the present embodiment, each of the pair of protrusions 22 has a substantially cylindrical tip portion and a protrusion male screw 26 formed at the rear end portion on the opposite side. Then, the protrusion 22 is arranged on the peripheral side surface of the end member 18 by screwing the protrusion male screw 26 into the female screw 28 for arranging the protrusion formed on the peripheral side surface of the end member 18. There is. Further, the detent screw 78 is screwed into the detent screw hole 76 formed on the end surface of the end member 18, and the tip of the detent screw 78 comes into contact with the protrusion male screw 26, so that the protrusion male screw It prevents the protrusion 22 from rotating and the protrusion 22 from undesirably coming off. Instead of this, the entire end member 18 including the protrusion 22 may be integrally formed.

Further, although a pair of protrusions 22 are formed in the present embodiment, the number of protrusions 22 may be one or three or more.

As described above, the bar member 14 is a long member to which a tool or the like (not shown) is attached to the tip end portion thereof, and is generally composed of a bar-shaped member 30 and an end member 32.

The rod-shaped member 30 is a substantially cylindrical long member like the rod-shaped member 16 described above, and as described above, for example, a tool or the like is attached to a tip portion (not shown) thereof, and a rear end portion (end portion) thereof. Is inserted in the end member 32. The shape of the rod-shaped member 30 is not limited to a substantially columnar shape like the rod-shaped member 16 described above, and may be, for example, a prismatic member or a hollow member. , It may be shaped like a fishing rod so that it becomes thinner toward the tip. In addition, there are no particular restrictions on the material. Further, the end member 32 is fixed to the rod-shaped member 30 with a plurality of fixing pins 31.

The end member 32 is a member into which the rear end portion of the rod-shaped member 30 is inserted as described above, and the other end portion having a small diameter in the end member 18 of the rod member 12 is inserted into one end thereof. A material insertion recess 34 is formed, and an insertion recess 36 into which the rod-shaped member 30 is inserted is formed at the other end.

Further, on the peripheral side surface of one end of the end member 32 constituting the bar insertion recess 34, a substantially L-shaped notch into which the protrusion 22 fits when the end member 18 of the bar 12 is accommodated. The portion 38 is formed. The notch 38 is formed in the same number as the number of protrusions 22 (two in the present embodiment), and one end of each reaches the rear end edge of the end member 32 in the rod member 14, and the rod is formed from this one end. The longitudinal portion 40 extending toward the central portion of the member 14, the circumferential portion 42 extending substantially in the circumferential direction of the bar 14 from the other end of the longitudinal portion 40, and the longitudinal portion 40 in the circumferential portion 42 are opposite to each other. It is composed of a housing portion 44 extending from a side end toward the rear end edge of the bar member 14.

The locknut 50 is composed of a first nut 52 and a second nut 54.

The first nut 52 is formed with a first female screw 56 screwed into a bar-side male screw 24 formed on the end member 18 of the bar 12 on the inner surface, and the first male screw 58 is formed on the outer surface. It is formed. Further, a flange portion 60 is formed on the edge of the first nut 52 on the bar 14 side.

The second nut 54 is formed on the inner surface with a second female screw 62 that is screwed with the first male screw 58 of the first nut 52.

In this embodiment, the lock structure 100 is composed of the lock nut 50, the end member 18 of the bar member 12, and the end member 32 of the bar member 14.

(Procedure for connecting the joint rod 10 using the lock structure 100)
Next, a procedure for connecting the joint rod 10 using the lock structure 100 according to the present embodiment will be described. First, the end member 18 is attached to the tip end portion of the rod-shaped member 16 to form the bar member 12, and similarly, the end member 32 is attached to the rear end portion of the rod-shaped member 30 to form the bar member 14.

After that, the tip of the bar 12 (the tip of the end member 18) is placed in the bar insertion recess 34 formed at the rear end of the bar 14 (the rear end of the end member 32). It is inserted against the urging force from the urging member 72 that comes into contact with the bottom surface of the 34. At this time, the protrusion 22 formed on the bar 12 moves while being fitted in the longitudinal portion 40 of the notch 38 formed on the bar 14.

After inserting the tip of the bar 12 into the bar insertion recess 34 until the protrusion 22 reaches the circumferential portion 42 of the notch 38, the bar 14 is centered on the longitudinal central axis of the bar 12. On the other hand, the bar 12 is rotated. At this time, the protruding portion 22 moves while being fitted in the circumferential direction portion 42 of the notch portion 38.

A direction in which the bar 12 is rotated with respect to the bar 14 until the protrusion 22 reaches the accommodating portion 44 of the notch 38, and then the bar 12 is separated from the bar 14 by the urging force from the urging member 72. Return to a little. As a result, the protrusion 22 is completely accommodated in the accommodating portion 44 of the notch portion 38.

Next, while maintaining the positional relationship between the bar member 12 and the bar member 14, the first nut 52 constituting the locknut 50 is rotated with respect to the bar member 12, and the flange portion 60 of the first nut 52 is rotated. The first nut 52 is moved toward the bar 14 until the outer surface abuts on the rear end face of the bar 14 (end member 32). At this time, the second nut 54 moves toward the bar 14 together with the first nut 52.

After that, as shown in FIGS. 3 and 4, the first nut 52 is maintained in a state where the outer surface of the flange portion 60 of the first nut 52 is in contact with the rear end surface of the bar 14 (end member 32). The second nut 54 is rotated with respect to the second nut 54 until the rear end surface of the second nut 54 comes into contact with the step portion 64 formed between the tip end portion and the center portion of the end member 18 of the bar member 12. The 54 is moved toward the rear end of the bar 12.

When the second nut 54 is moved until the rear end surface of the second nut 54 comes into contact with the step portion 64, the connecting procedure of the joint rod 10 using the lock structure 100 is completed.

(Characteristics of Lock Structure 100 According to This Embodiment)
According to the lock structure 100 according to the present embodiment, the tip surface of the flange portion 60 of the first nut 52 constituting the lock nut 50 pushes the bar member 14, and the rear end surface of the second nut 54 is in the opposite direction. Is designed to push the bar material 12. As a result, the bar 12 is restricted from moving in the longitudinal direction with respect to the bar 14, so that the protrusion 22 formed on the bar 12 accommodates the notch 38 formed on the bar 14. The state of being housed in the part 44 is maintained. Therefore, the rotation of the bar 12 with respect to the bar 14 is also restricted. As a result, the connected state of the bar 12 and the bar 14 is undesirably released regardless of the direction in which a force is applied while using the tool or the like to which the joint bar 10 having the lock structure 100 is applied. It can be prevented from being stowed.

(Modification example 1)
In the above-described embodiment, the bar member 12 and the bar member 14 are composed of the bar-shaped members 16, 30 and the end members 18, 32, but instead of this, the bar-shaped members 16, 30 and the end members 18, 32 are used. And may be integrated to form a bar 12 or a bar 14.

(Modification 2)
Further, in the above-described embodiment, the tip end portion of the bar member 12 on the rear end side of the joint bar 10 is accommodated in the rear end portion of the bar member 14 on the tip end side of the joint bar 10. On the contrary, the rear end portion of the rod member 14 on the tip end side of the joint rod 10 may be accommodated in the tip end portion of the rod member 12 on the rear end side of the joint rod 10. In this case, the configuration of the end member 18 in the bar 12 and the configuration of the end member 32 in the bar 14 are opposite to each other.

(Modification example 3)
A flange portion 60 was formed on the first nut 52 in the above-described embodiment, but the flange portion 60 is not an indispensable configuration, and the tip surface of the first nut 52 is formed without forming the flange portion 60. It may be brought into contact with the rear end surface of the end member 32 of the bar member 14.

The embodiments disclosed this time should be considered to be exemplary in all respects and not restrictive. The scope of the present invention is shown by the scope of claims, not the above description, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

10 ... Joint rod, 12 ... Bar material, 14 ... Bar material, 16 ... Rod-shaped member, 17 ... Fixing pin, 18 ... End member, 20 ... Insertion recess, 22 ... Protrusion, 24 ... Bar side male screw, 26 ... Male screw for protrusion, 28 ... Female screw for arranging protrusion, 30 ... Rod-shaped member, 31 ... Fixing pin, 32 ... End member, 34 ... Bar material insertion recess, 36 ... Insert recess, 38 ... Notch, 40 ... Longitudinal part, 42 ... Circumferential part, 44 ... Accommodating part 50 ... Lock nut, 52 ... 1st nut, 54 ... 2nd nut, 56 ... 1st female screw, 58 ... 1st male screw , 60 ... Flange, 62 ... Second female screw, 64 ... Step 70 ... Biasing member insertion hole, 72 ... Biasing member, 74 ... Biasing spring, 76 ... Anti-rotation screw hole, 78 ... Anti-rotation screw 100 ... Lock structure

Claims (2)

A first nut with a first female thread formed on the inner surface and a first male thread formed on the outer surface,
It is provided with a second nut on the inner surface on which a second female screw to be screwed with the first male screw is formed.
The first female screw of the first nut is a lock nut that is screwed into a male screw on the rod side formed at the end of one of the pair of rods constituting the joint rod. A joint rod lock structure including a pair of rod members and the locknut according to claim 1.
The end portion of one of the rods is accommodated in the end of the other rod.
A protrusion projecting from the peripheral side surface of one end of the bar moves while being fitted to the peripheral side surface of the other end of the bar, and one end thereof is at the tip edge of the other bar. In the longitudinal portion extending from one end toward the central portion of the other rod, the circumferential portion extending from the other end of the longitudinal portion in the circumferential direction of the other rod, and the circumferential portion. A notch having a housing portion extending from the end opposite to the longitudinal portion toward the tip edge of the other rod member is formed.
A male screw on the bar side is formed on the peripheral side surface at the end of the bar.
With the protrusion housed in the notch, the first female screw is screwed into the male screw on the rod side in a direction in which one rod is separated from the other rod. A lock structure of a joint rod that presses and urges the end face of the other rod member with the end face of the first nut and presses and urges one of the rod members with the end face of the second nut.

Images