JP6777314B2 - Connection structure of long rod and unit of connection unit for that - Google Patents

Description

In the present invention, 3 to 15 short rods of about 0.5 to 1.0 m are connected to form a long rod having a length of 3 to 15 m, and high axial force (pressing force / striking force) and rotational torque are applied. It relates to a rod connecting structure that can be used as a long rod that can be transmitted and can be disassembled and stored as long as a short rod when not in use.
As an application of a long rod of about 5 to 10 m, the weight's own weight, axial force and rotational torque are applied from the ground device to the penetration test equipment such as the screw point at the tip of the ground used for the geological penetration test. Can be used as a rod member. Alternatively, it can also be used as a long rod shaft for boring while applying a pressing force / striking force to a ground excavator in civil engineering construction. Alternatively, it is a technique that can be used as a transmission member for the axial force and the rotational force of the rotating mechanism of a machine.

For geological survey and underground drilling work, male and female threads are formed at both ends of multiple short rods with a length of about 0.75 m or 1.0 m, and these are screwed together to make 5 to 10 m. A long rod member is made, an excavation tool such as a screw point is attached to the lower end, and the upper part of the same long rod member is excavated on the ground by applying axial force and rotational torque using human power, weight or power source. It was. Alternatively, in the underground drilling work or the geological sample soil collection work, a plurality of short rods are connected to the work of rotating the underground instrument at the tip of the long rod member while applying a pressing force or a striking force. A long rod is used. Assembling and constructing a long rod by screwing and connecting a plurality of short rods is advantageous in terms of storage and movement due to the short size of the short rod, and it is easy to obtain the required long size. Is to be. Furthermore, even if a damaged part, deformed worn part, or defective part occurs in the long rod, it can be used as a long rod by replacing only the components of the short rod at that part, and the service life as a long rod is long. , There is an advantage that it can be cheaper than the case of replacing the entire long rod.

Conventional connection of these short rods is to form male and female threads at the upper and lower ends of the short rods, screw the upper and lower short rods directly to each other with these screws, and connect multiple short rods to make them longer. It is a structure to do. Examples of this structure are shown in Patent Documents 1 and 2.

In this conventional connection technology by direct screwing, all the axial force and rotational torque acting on the short rod are transmitted through the threaded part of the short rod, so if the short rod is used repeatedly many times, this threaded part will be released. It was deformed, damaged, and worn, making it difficult to screw it into a long rod, or it was difficult to disassemble it into a short rod. In addition, there is a drawback that the rod life is short.
Further, since screwing is a rotary operation performed on site, there is a drawback that a long time is required for attachment / detachment. Further, when the screw portion is crimped or seized as described above, it is difficult to screw / remove / disassemble.

Japanese Unexamined Patent Publication No. 9-53224 Japanese Patent No. 2678981

The problem to be solved by the present invention is to solve the problem of a long rod in which a short rod is directly screwed by a conventional male screw and a female screw so that the load of axial force and rotational torque does not act strongly on the threaded portion. It is an object of the present invention to provide a connecting structure for a long rod, which can hardly cause damage to a screw portion, can greatly extend the service life of the rod, and can quickly and easily attach and detach the short rod.

The configuration of the present invention that solves this problem is
1) A long rod connection structure used to transmit axial force and rotational torque by connecting multiple short rods in a detachable manner to form a long rod.
A short rod a having the same structure A below, which is arranged above or below and is connected, an intermediate cylinder b of the structure B below for connecting the upper and lower short rods a, and a retaining tool c of the structure C below. And the axial force torque transmission shaft d of the following structure D and the retaining tool locking means e of the following structure E for breaking the connection of the short rod a are made into a set of connecting parts, and the dimensions of the component portion. The relationship is as shown in F below, and the constituent parts b to e are incorporated between the short rods a above and below as shown in G below, and the short rods are sequentially detachably connected to the long rod. to connection structure of the long rod a: short rod a disposed above the lower of the is to vertically protruding axis a ₁ of smaller outer diameter than the rod outer diameter at its lower end to the rod axis direction, moreover the projecting a male screw a ₂ engraved on the outer periphery of the shaft, the upper end surface of the short rod provided with a recess a ₃ recessed in the axial direction, and the structure engraved female thread a ₄ on the inner surface of the recess,
B: intermediate tubular member b of the can internal threads b ₁ capable external thread a ₂ and screwing protrusion shaft a ₁ of the short rod a of the upper the cylindrical inner diameter at the top of the cylinder inner surface is [Phi ₈ provided, cylindrical inner surface of the stepped portion b ₂ protruding toward the cylinder center direction causes projecting from the middle, by inclining the upper part of the stepped portion to diameter according upward and expanded inclined face b ₂₁ and, even more the stepped portion a structure in which a polygon section b ₃ which is chamfered into a polygonal shape in a cylindrical inner surface of the lower,
C: The retaining tool c is a vertically short ring-shaped moving body c ₁ having an outer diameter that can be fitted inside the intermediate tubular body b, and is vertically hung downward from the moving body in the outward direction. a plurality of bullet branch c _2, reduced diameter stepped portion b diameter inclined surface ₂ b ₂₁ and the axial force torque transmitting shaft d of the mounted and the intermediate tubular member b to the lower end of each bullet branch c ₂ having a biasing force It is a structure composed of a plurality of wedge bodies c ₃ arranged in a ring shape that can be used with the part d ₇ .
D: axial force torque transmitting shaft d of the can, the upper end surface of the recess a ₃ internal thread a ₄ and screwed to the bottom surface of the recess δ and abutted external thread d of the short rod a lower disposed thereunder has a _1, provided polygonal portion d ₂ which is chamfered polygonal shape to mate with the polygonal section b ₃ located at the inner surface under the intermediate cylinder member b over the same external thread, over the same polygonal section cylindrical base portion d of the outer diameter [Phi ₅ to Se' and said intermediate cylindrical body b diameter inclined surface b ₂₁ of the stepped portion b ₂ protruding on the inner surface of Nuki挿can and the intermediate tubular member b to the polygon portion b ₃ of ₃ is provided, and an insertion shaft portion d ₄ that can be partially inserted inside the ring-shaped moving body c ₁ of the retaining tool c is erected on the base portion, and the insertion shaft portion has an outer diameter Φ at the upper end. which has a reduced diameter portion d ₇ of reduced diameter according to further lower the largest diameter d ₆ of the outer diameter [Phi ₃ in the middle through the enlarged diameter portion d ₅ gradually increases in diameter in accordance with downward from _1, the maximum diameter the outer diameter [Phi ₃ parts d ₆ said base d ₃ of the outer diameter [Phi ₅ smaller than and the maximum diameter d ₆ outer diameter [Phi ₃ and [Phi ₈ - [Phi] ₃ of the distance between the intermediate cylinder member b of the cylinder inner diameter [Phi ₈ of a structure that can be of passing the wedge c ₃ of missing stop c in the gap,
E: The retaining tool locking means e is a means for separating the connected short rods, and the wedge body c ₃ of the retaining tool c faces the reduced diameter portion d _{7 of the} axial force torque transmission shaft d. At this position, the moving body c ₁ can be locked with the intermediate cylinder b by operating from the outside of the intermediate cylinder b so that the retaining tool c can move integrally with the intermediate cylinder b, and the intermediate cylinder b. It is a means by which the locked state can be released by operating the outside of the body b and the short rod can be separated.
F: the missing wedge c ₃ fasteners c is the step part b ₂ or enlarged diameter inclined surface b ₂₁ and wedge c ₃ of the engaged state of inclination of the upper intermediate tubular body b, axial force torque The insertion shaft d ₄ is locked in the middle of the enlarged diameter d ₅ of the transmission shaft d ₄ , and the step portion b ₂ of the intermediate cylinder b comes into contact with the outer periphery of the base d _{3 of the} axial force torque transmission shaft d. At the present position, the upper end surface β of the insertion shaft portion d ₄ abuts on the lower end surface α of the protruding shaft a ₁ of the upper short rod a, and at the same time, the lower end surface γ of the male screw d ₁ of the axial force torque transmission shaft d is downward. a female thread a ₄ of the recess a ₃ rod a contact, and a polygon portion b ₃ of the intermediate cylinder member b is not set vertical dimensions as engaged with polygonal portion d _2,
G: With the retaining tool c of each set inserted inside from the upper opening b ₄ of the intermediate cylinder b and the wedge body c ₃ locked to the step portion b ₂ of the intermediate cylinder b, the same. screwed an internal thread b ₁ of the inner surface upper part of the intermediate tubular member b to the external thread a ₂ below the upper short rod a, also axial force torque transmitted to the internal thread a ₄ of the recess a ₃ at the upper end of the short rod a lower Below the intermediate cylinder b in which the male screw d _{1 of the} shaft d is screwed and the insertion shaft portion d ₄ of the axial force torque transmission shaft d projecting to the lower short rod a is screwed below the upper short rod. is inserted from the opening b _5, it connects the short rod a of the upper and lower by inserting the upper end surface of the insertion shaft portion d ₄ beta until abuts the lower end surface α of the protrusion shaft a ₁ of the upper short rod a , Incorporate the constituent parts b to e of each set as described above, and connect the short rods one after another to make them longer.
2) retaining tool locking means e is, if the screw hole e ₁ provided in the side wall of the intermediate cylinder member b, remove the short rod a configuration which is screwed a short screw e ₂ in the screw holes, screw e ₂ was a stop c omission in pressure contact with the inner wall of the intermediate cylinder member b of the outer peripheral wall of the operating member c ₁ of the detachment preventing member c in be screwed into the intermediate tubular body b in a fixed state to the intermediate tubular member b, also When connecting the short rod a, the screw e ₂ is moved outward to release the lock so that the moving body c ₁ can be moved up and down so that the rod can be connected. The length described in 1) above. long connection structure 3 of the rod) and the axial line a ₅ short rods a and the axial line of the insertion shaft portion d ₄ is in the on the same axial line, moreover a shaft bottom α of protrusion shaft a ₁ of the short rod a One abutting shaft bottom surface α is made a concave spherical surface or a convex spherical surface so that the upper end surface β of the insertion shaft portion d ₄ is line-symmetrical around the axis center line and within a predetermined radius from the axis center line, and the other. The upper end surface β that comes into contact with this is shaped so that it becomes a convex spherical surface or a concave spherical surface, and the bottom surface α and the upper end surface β are fitted to each other on a spherical surface within a predetermined range, and the connecting portion of the upper and lower short rods. 1) or 2) The connection structure of the long rod according to the above 1) or 2), which reduces the lateral movement of the short rod in 4) The axial force torque transmission shaft d is the vertical and vertical of the polygonal column portion d ₂ and the male screw d _1. The structure is such that the outer diameter has the same outer diameter as the outer diameter of the rod, and the connecting portion d ₈ for rotation operation is provided with the spanner hook portion d ₉ for shaft rotation operation formed on the intermediate outer peripheral portion thereof. ~ 3) Connecting structure of the long rod according to any one of them 5) Disconnecting the short rod a having the structures A to E below, the intermediate cylinder b, the retaining tool c, and the axial force torque transmission shaft d. It is composed of one component each with the retaining tool locking means e for the purpose, and the dimensional relationship of the component part is as shown in F below, and the component parts a to e are connected and assembled as shown in H below. was, the unit becomes a linking unit of the long rod a: short rod a disposed above the lower of the is to vertically protruding axis a ₁ of smaller outer diameter than the rod outer diameter at its lower end to the rod axis direction , moreover the male screw a ₂ engraved on the outer periphery of the projecting shaft, the upper end surface of the short rod provided with a recess a ₃ recessed in the axial direction, a structure in which engraved the female thread a ₄ on the inner surface of the recess ,
B: intermediate tubular member b of the can internal threads b ₁ capable external thread a ₂ and screwing protrusion shaft a ₁ of the short rod a of the upper the cylindrical inner diameter at the top of the cylinder inner surface is [Phi ₈ provided, cylindrical inner surface of the stepped portion b ₂ protruding toward the cylinder center direction causes projecting from the middle, by inclining the upper part of the stepped portion to diameter according upward and expanded inclined face b ₂₁ and, even more the stepped portion a structure in which a polygon section b ₃ which is chamfered into a polygonal shape in a cylindrical inner surface of the lower,
C: wherein the detachment preventing member c is urging the intermediate cylinder operating member c ₁ vertically short ring-shaped having an inner diameter that can be fitted into the interior of b, and outwardly is vertically downward from the operation member a plurality of bullet branch c _2, reduced diameter portion of the stepped portion b diameter inclined surface ₂ b ₂₁ and the axial force torque transmitting shaft d of the mounted and the intermediate tubular member b to the lower end of each bullet branch c ₂ having a force It has a structure consisting of a wedge body c ₃ arranged in a ring shape that can be used with d ₇ .
D: axial force torque transmitting shaft d of the can, the upper end surface of the recess a ₃ internal thread a ₄ and screwed to the bottom surface of the recess δ and abutted external thread d of the short rod a lower disposed thereunder has a _1, provided polygonal portion d ₂ which is chamfered polygonal shape to mate with the polygonal section b ₃ located at the inner surface under the intermediate cylinder member b over the same external thread, over the same polygonal section the cylindrical base portion d ₃ of the outer diameter [Phi ₅ which can pass through the intermediate cylindrical body b the stepped portions b ₂ of the enlarged diameter inclined surface b ₂₁ made and projecting on the inner surface of the intermediate cylinder b Nuki挿the polygon portion b ₃ of An insertion shaft portion d ₄ that can be partially inserted inside the ring-shaped moving body c ₁ of the retaining tool c is erected on the base portion, and the insertion shaft portion has an outer diameter Φ _{1 at the} upper end. which has a reduced diameter portion d ₇ of reduced diameter according to further lower the largest diameter d ₆ of the outer diameter [Phi ₃ in the middle through the enlarged diameter portion d ₅ gradually increases in diameter in accordance with downward from the maximum diameter portion outside diameter [Phi ₃ of d ₆ is the [Phi ₈ - [Phi] ₃ of the distance between the outer diameter [Phi ₃ and the intermediate cylindrical body b of the cylinder inner diameter [Phi ₈ of the base d ₃ of the outer diameter [Phi ₅ smaller than and the maximum diameter d ₆ a structure capable of passing a wedge c ₃ fasteners c missing in the gap,
E: The retaining tool locking means e is a means for separating the connected short rods, and the wedge body c ₃ of the retaining tool c faces the reduced diameter portion d _{7 of the} axial force torque transmission shaft d. At this position, the moving body c ₁ can be locked with the intermediate cylinder b by operating from the outside of the intermediate cylinder b so that the retaining tool c can move integrally with the intermediate cylinder b, and the intermediate cylinder b. It is a means by which the locked state can be released by operating the outside of the body b and the short rod can be separated.
F: the missing wedge c ₃ fasteners c is the step part b ₂ or enlarged diameter inclined surface b ₂₁ and wedge c ₃ of the engaged state of inclination of the upper intermediate tubular body b, axial force torque in the upper and lower middle diameter portion d ₅ of the insertion shaft portion d ₄ of the transmission shaft d becomes locked state, also stepped portions b ₂ of the intermediate cylinder member b is Se' the base d ₃ the outer periphery of the shaft force torque transmission shaft d At this position, the upper end surface β of the insertion shaft portion d ₄ abuts on the lower end surface α of the protruding shaft a ₁ of the upper short rod a, and at the same time, the lower end surface γ of the male screw d ₁ of the axial force torque transmission shaft d is downward. The vertical dimensions are set so that the polygon portion b ₃ of the intermediate cylinder b is fitted with the polygonal pillar portion d _{2 while being in contact} with the female screw a ₄ of the recess a ₃ of the rod a.
H: The intermediate cylinder body is in a state where the retaining tool c is inserted into the inside through the upper opening b ₄ of the intermediate cylinder body b and the wedge body c ₃ is locked to the step portion b ₂ of the intermediate cylinder body b. The female screw b ₁ on the upper part of the inner surface of b is screwed into the male screw a ₂ below the short rod a, and the male screw d _{1 of the} axial torque transmission shaft d is screwed into the female screw a ₄ of the recess a _{3 at} the upper end of the short rod a. Make it fit
6) retaining tool locking means e is, a screw hole e ₁ provided in the side wall of the intermediate cylinder member b, when removing the rod in a configuration screwed a short screw e ₂ in the threaded hole, the intermediate cylindrical body a screw an outer peripheral wall of the operating member c ₁ of the detachment preventing member c in be screwed into the b can the pressure was missing stop c on the inner wall of the intermediate cylinder member b in a fixed state to the intermediate tubular member b, also a short rod When connecting, the screw is moved outward so that the moving body c ₁ can be moved up and down so that the rod can be connected. The unit 7) the axial core line a _{5 of the} short rod a described above. and the axial line of the insertion shaft portion d ₄ is in the on the same axial line, moreover the upper end face β and is about the axis line of the shaft bottom α and the insertion shaft portion d ₄ of the protruding shaft a ₁ of the short rod a One abutting shaft bottom surface α is a concave sphere or a convex sphere, and the other upper end surface β abutting the shaft bottom surface β is a convex sphere or a concave sphere so as to be line-symmetrical and within a range of a predetermined radius from the axis center line. The bottom surface α and the upper end surface β are spherically fitted to each other within a predetermined range, and the lateral movement of the short rod at the connecting portion of the upper and lower short rods is reduced. Or 6) The unit 8) The axial force torque transmission shaft d has an outer diameter the same as the rod outer diameter between the upper and lower sides of the polygonal pillar portion d ₂ and the male screw d _1, and the shaft rotation operation is performed in the middle. it is a structure in which a rotation operation for articulation d ₈ forming a use spanner hook, the 5) to 7) unit 9 according any) the lower end surface α and detachment preventing member c of the projection axis a ₁ of the short rod The connecting structure of the long rod according to any one of 1) to 4) above, wherein an oaring is interposed between the short rod a and the lower end of the intermediate cylinder b 10) The protruding shaft of the short rod. was interposed an O-ring and between the lower end of the short rod a and the intermediate cylinder b below the lower end surface α and detachment preventing member c in a _1, the unit of the 5) to 8), wherein any is there.

In the present invention, the axial force is abuts the lower end face of the protruding shaft a ₁ below the upper short rod a alpha is the upper end surface β of the insertion shaft portion d ₄ of the axial force torque transmitting shaft d, moreover axial force torque transmission the lower end surface of the male screw d ₁ of the lower end of the shaft d gamma is hitting the bottom δ of the recess a ₃ formed on the upper end surface of the short rod a lower, axial force in the axial direction of the short rod a is a threaded portion Since it is directly transmitted downward through the upper and lower abutting surfaces (α, β) and (γ, δ) without going through, the screw portion is hardly deformed or damaged. Further, since the rotational torque of the rod fits with the polygon portion b ₃ of the intermediate cylinder b and the polygonal prism portion d _{2 of the} axial force torque transmission shaft d, a large rotational torque can be transmitted. A screw portion of the female screw b ₁ of the male screw a ₂ and the intermediate tubular member b of the protruding shaft a _1, there is a male thread d ₁ and the threaded portion of the internal thread a ₄ short rods a downward axial force torque transmission shaft d, rotary Since only torque acts, it is less likely to be deformed or damaged.

In the connecting work of the short rod a having the configurations A to F and having a length of about 0.75 to 1.00 m and an outer diameter of 19 mm, the retaining tool c is opened upward in advance inside the intermediate cylinder b at a factory or the like. fitted from b _4, keep the state of locking the wedge c ₃ to the stepped portion b _2. Then, the axial internal thread b ₁ of the intermediate tubular member b to the external thread a ₂ of the protruding shaft a ₁ below the short rod a screwed further into the internal thread a ₄ of the recess a ₃ of the upper end surface of the short rod a advance many prepared that the external thread d ₁ of torque transmission shaft d in threaded engagement as a unit. The length of this unit is a little longer than the length of the short rod a, and is a little heavier than the short rod alone. Therefore, this unit is easy to store and transport, and can be carried manually.
At the excavation site, as shown in FIGS. 8 and 9, the units can be easily connected to each other by fitting the axial force torque transmission shaft d above the unit into the intermediate cylinder b below the other unit. .. Further, if the intermediate cylinder b below the other unit is fitted into the uppermost exposed axial force torque transmission shaft of the connected unit, a large number of units can be connected to each other to achieve the required length. That is, a plurality of units can be easily and quickly connected until the required length is reached. In this state, apply axial force and rotational torque to use.

In this unit connected state, as shown in FIG. 10, even if a force for pulling up the unit connected body is applied, the wedge body c ₃ of the retaining tool c and the step portion b ₂ of the intermediate cylinder b are locked. The wedge body c ₃ acts as a wedge between the outer periphery of the axial force torque transmission shaft d and the step portion b _2, and the two are not separated from each other. When a downward axial force is applied to the unit connection body, it returns to the above-mentioned usage state.

When this unit connecting body is used as a long rod and then disassembled into a single unit, as shown in FIG. 11, the part where the unit connecting body is separated is located at a position where disassembly / separation work can be easily performed (for example, the ground surface). Pull up to. Wedge c ₃ is the position of the reduced diameter portion d ₇ of the axial force torque transmission shaft d (i.e., wedge c ₃ is a position above the step portion b ₂ of the intermediate cylinder member b) so as to decompose the upper The short rod a and the intermediate cylinder b of the unit are pushed down a little, and then the retaining tool c is integrated with the intermediate cylinder b at this position by using the retaining tool locking means e. If the upper unit is lifted in this state, the wedge body c ₃ of the retaining tool c is always above the step portion b ₂ of the intermediate cylinder b, and the units can be separated without being locked. In this way, the unit (single unit) can be easily separated and disassembled from the unit connected body. The unit connection body after use may not only be separated into a single unit, but may also be disassembled into a plurality of unit connection states having a length and weight that do not hinder transportation and storage. Incidentally, the rod of long as a method separating decomposed into short rods or a single unit, a screw hole e ₁ is opened without mating threaded short screws e ₂ into the threaded hole e ₁ as in Example, as shown in FIG. 18 keep in, the separation degrades when the short rod Te pulled short rod single unit screwed stopper e ₃ into the screw hole e _1, stop loss by inserting the distal end portion to the intermediate cylinder body b There is also a method of fixing c in the intermediate cylinder b.

Once you have before transportation work to short rods a and the insertion shaft portion d ₄ and the intermediate cylinder b and missing stopper c units in the factory, coupling operation of the in situ unit axial force torque transmission shaft Is only required to be inserted into the intermediate cylinder b of another unit, and the connecting work can be greatly shortened. Of course, it is also possible to work on the site to make a unit.
It is advantageous in terms of workability, transportation, and storage at the site that the component parts a to e of the present invention are connected and assembled as the above-mentioned unit before the factory and shipment, but the component parts a to e are individually formed or assembled. Of course, it is also possible to transport only a part of them in a connected state and then connect and assemble them on site.

Further, as shown in FIG. 14, in the case where the lower end of the intermediate cylinder b and the upper end surface of the short rod a are interspersed with the O-ring or ₂ on the outer circumference of the polygonal prism portion d ₂ , the lower end of the intermediate cylinder b and the short rod a It is possible to prevent earth and sand from entering through the gap with the upper end surface.

O-ring or ₁ so as to press-contact the inner wall of the intermediate cylinder b between the lower end of the protruding shaft a ₁ below the rod a and the upper surface of the moving body c ₁ of the retaining tool c inside the intermediate cylinder b. mounting a structure, when adhered by the adhesive to the external thread a ₂ screwed portion between the internal thread b ₁ of the short rod a and the intermediate cylinder b, the adhesive flows down the O-ring or ₁ below Adhesive adheres to the retaining tool c to stop the movement of the retaining tool c and prevent the function from being lost.
Furthermore, the wedge c ₃ is positioned in the reduced diameter portion d ₇ of the axial force torque transmission shaft d in a state of depressing the intermediate cylinder b in a thickness of O-ring or _1, it can exactly be bitten therein ..

FIG. 1 is an explanatory diagram showing a connected state of an embodiment of the present invention. FIG. 2 is an enlarged explanatory view showing a pressure contact state between the wedge body and the step portion of FIG. 1 (b). FIG. 3 is a vertical cross-sectional view of the intermediate cylinder of the embodiment. FIG. 4 is a bottom view of the intermediate cylinder of the embodiment. FIG. 5 is a front view showing an axial force torque transmission shaft of an embodiment. FIG. 6 is a front view showing the retaining tool of the embodiment. FIG. 7 is a bottom view showing the retaining tool of the embodiment. FIG. 8 is an explanatory view showing a process of connecting the rods of the embodiment. FIG. 9 is an explanatory diagram showing a rod connecting process of the embodiment. FIG. 10 is an explanatory view showing a connected state by a wedge when the rod is pulled up in the embodiment. FIG. 11 is an explanatory view showing a rod removing process of the embodiment. FIG. 12 is a partial cutout structure explanatory view of a unit in which an intermediate cylinder with a retaining tool sealed at the lower end of the rod of the embodiment and an axial force torque transmission shaft screwed into the upper end of the rod. FIG. 13 is a front view showing another example of the axial force torque transmission shaft in the present invention. FIG. 14 is an explanatory diagram showing an example of an O-ring interposition state in the embodiment. FIG. 15 is an explanatory view of another form example of the step portion of the intermediate cylinder b of the present invention. FIG. 16 is an explanatory diagram showing an example of another retaining tool c of the present invention. FIG. 17 is an explanatory view showing an example in which the bottom surface α of the shaft of the present invention and the upper end surface to be fitted to the bottom surface α are spherical around the axis center line. FIG. 18 is an explanatory diagram showing an operation procedure of another example of the retaining tool locking means when the long rod is pulled up to form the short rod a or a single unit.

The material of the rod may be made of a metal that can sufficiently withstand the axial force and the rotational torque, and the retaining tool may be made of an alloy by machining, or may be made of a strong plastic.
In the embodiment, the retaining tool locking means is a headless screw e ₂ screwed into the screw hole e ₁ and the same screw hole e ₁ , and the moving body c ₁ and the wedge body c ₃ below it are reduced in diameter d. _Although it is locked to the intermediate cylinder b at the position where it comes into contact with _{7 so} that the retaining tool c moves together with the intermediate cylinder b, another locking mechanism that does not project much from the intermediate cylinder b to the surface may be used. .. Additionally, the other methods as the missing stop locking means e a screw hole e ₁ provided in the side wall of the intermediate cylinder member b as in Example, use was screwed a short screw e ₂ thereto, in FIG. 18 As shown, the short screw e ₂ is not screwed in, the screw hole e ₁ is left open, and the short rod is connected and used. Muddy water rod periphery and left open the screw hole e ₁ is used in the or state which is advanced from the screw hole e _1. Since the diameter of the screw hole e ₁ In this state small, there is no trouble in vertical movement of the intermediate cylinder member b. Then, at the time of disassembling the short rods linked vertically Te pulled by solving the coupling of short rods to the short rod, the stopper e ₃ or shaft of elongated into the screw hole e ₁ of the pulled intermediate tubular member b A method of inserting the retaining tool c from the outside and fixing it in the intermediate cylinder b can also be adopted.
In addition, when a plurality of short rods or units are connected to form a long rod, the lowermost and uppermost ends may be male threads or female threads for connection with the lower member and upper member, or the polygonal column portion. -When making a polygon part / spanner hook part, an auxiliary screw connecting member having an appropriate structure may be attached to the short rod at the lowermost end or the uppermost end. Alternatively, the male screw of the protruding shaft below the short rod, the male screw at the bottom of the connected axial force torque transmission shaft, or the female screw at the recess at the upper end can be used as they are for connection with other members.
Further, a shaft bottom α of protrusion shaft a ₁ of the short rod a, which abutting surface between the upper end surface β of the insertion shaft portion d ₄ abutting axial force torque transmitting shaft d is such that surface contact over a wide area It is preferable to do so.
It may be a shaft bottom α and the upper end surface β and a flat surface, or axial centerline a ₅ and the insertion axial line of the shaft portion d ₄ and the same axial line of the short rod a, as shown in FIG. 17 a ₅ to match the, moreover shaft bottom α and the upper end surface β can also be adapted to fit in and spherical so as to be symmetrical about the axis line. In the latter case, the axial line a ₅ short rods a and the axial line of the insertion shaft portion d ₄ is matched, and the curved surface to fit the same radius of curvature about the axis line, for example, a spherical receiving as a not axial line of the axial center line of the short rod a insertion shaft portion d ₄ match if the, even if lateral movement mating surface becomes possible to closely axis inclination of the insertion shaft portion d ₄ The fulcrum of is moved from the step portion b ₂ to the fitting portion. As a result, the lateral movement of the fitting surface is limited to the range of the difference between the inner diameter of the step portion b ₂ and the outer diameter Φ ₅ of the base portion d ₃ of the axial force torque transmission shaft d. From this, by accurately manufacturing the inner diameter of the step portion b ₂ and the outer diameter Φ ₅ of the base portion d ₃ of the axial force torque transmission shaft d, the lateral movement of the connecting portion can be significantly increased in the connecting width of the lot. Can be made smaller.

(Example)
Examples of the present invention shown in FIGS. 1 to 6 will be described with reference to the drawings. An example is an example in which a short rod a of 0.95 m is connected in 10 steps with a connecting portion length of 50 mm and one unit is about 1.0 m to form a long rod having a length of about 10 m, and a screw point for a geological penetration test. It is a long rod for giving axial force (weight load) and rotational torque to (not shown).

(Explanation of code)
The reference numerals of the components shown in FIGS. 1 to 6 will be described.
a is a short rod having a length of 0.95 m and an outer diameter of 19 mm, a ₁ is a protruding shaft suspended below the short rod a, and a ₂ is a male screw engraved on the outer circumference of the protruding shaft, a ₃ Is a recess provided on the upper end surface of the short rod a, a ₄ is a female screw engraved on the inner surface of the recess, and a ₅ is an axial center line which is the rod center line of the short rod. b is a cylindrical intermediate cylinder having the same outer diameter as the outer diameter of the short rod a shown in FIG. 3 and having a length of about 50 mm, and b ₁ is a female screw engraved on the inner surface of the upper part of the intermediate cylinder, b ₂ the stepped portion inner surface provided in the middle of the inner surface of the intermediate cylinder member b overhangs inward, b ₂₁ is a diameter inclined surface facing the cylindrical center of the stepped portions b _2, the intermediate cylinder b The diameter of the sloped surface is increased and the inner diameter of the sloped surface is increased. b ₃ is a polygonal portion chamfered to a hexahedron formed on the lower inner surface of the step portion b ₂ of the intermediate cylinder b, b ₄ is an upper opening of the intermediate cylinder b, b ₅ is a lower opening of the intermediate cylinder b, e ₂ is a fixing screw that uses a retaining tool c with a driver locking groove on the screw end face to separate the rod, e ₁ is a screw hole of the same screw, and c is a retaining tool manufactured by integrally processing an alloy. c ₁ is a ring-shaped moving body at the top of the retaining tool, c ₂ is a plurality of thin elastic bullet branches extending downward from the lower end of the moving body c ₁ , and c ₃ is a lower 4 of the bullet branch c ₂ . A downwardly narrowing wedge body provided at a location, d is an axial force torque transmission shaft shown in FIG. 5, d ₁ is a male screw carved in the lower part, and d ₂ is above the same male screw. the formed 6 prismatic polygonal portion, d ₃ is cylindrical base portion of smaller outer diameter [Phi ₅ than the outer diameter of the polygonal prism portion d ₂ provided above the same polygonal section d _2, d ₄ is the base upwards The insertion shaft portion d ₅ projecting toward the insertion shaft portion d ₅ is directed from the tip outer diameter Φ ₁ where the outer diameter of the insertion shaft portion d ₄ is small to the maximum diameter portion d ₆ which is the middle of the insertion shaft portion d ₄ and has the largest outer diameter. enlarged diameter portion whose diameter increases Te, d ₇ is a reduced diameter portion of the reduced diameter portion from the maximum diameter portion d ₆ to the base d _{3. On} the side surface of the base portion d ₃ , the step portion b ₂ of the intermediate cylinder b is fitted to the outer circumference of the base portion d ₃ , and the upper shoulder portion is the retaining tool c and the reduced diameter portion d of the axial force torque transmission shaft d. _7, and further measure the integrity of the positional relationship between the fixing screw holes e _1. e is a retaining tool locking means for locking the retaining tool c to the intermediate cylinder b, e ₁ is a screw hole provided on the outer peripheral wall of the intermediate cylinder b of the retaining tool locking means, and e ₂ is. a headless screws to be engaged locks and fixed state the operating member c ₁ to the intermediate cylindrical body b fasteners c missing screwed into the screw hole e _1, the screwdriver for locking groove on the threaded end It is provided.

Also, alpha shaft bottom (axial lower end surface) of the protruding shaft a ₁ is, beta upper surface, gamma lower end surface of the male screw d ₁ of the axial force torque transmission shaft d of the enlarged diameter portion d ₅ of axial force torque transmission shaft d , [delta] is a bottom of the recess a ₃ at the top of the rod a, the α and β abuts, gamma and [delta] are abuts surface. Ε in FIG. 1 is a gap in the connected state between the lower end of the intermediate cylinder b and the upper end surface of the lower short rod a.

To explain the dimensional relationships embodiment, the outer diameter of the intermediate tubular member b of the rod a the same diameter, the outer diameter of the insertion of the shaft portion d ₄ the tip of the axial force the torque transmission shaft d and [Phi ₁ , Φ ₂ is the outer diameter of the enlarged diameter portion d ₅ that expands downward, the outer diameter of the maximum diameter portion d ₆ is defined as Φ _3, and the reduced diameter portion d ₇ below the maximum diameter portion d _{6 is} further defined. the outer diameter and Φ _7. Further, the outer diameter of the base portion d ₃ below it is set to Φ ₅ , the inner diameter of the ring-shaped moving body c ₁ of the retaining tool c is set to Φ _4, and the wedge portion c _{3 of} Φ ₄₁ is the enlarged diameter inclination of the step portion b ₂ . the minimum inner diameter dimension of the wedge c ₃ in terms b ₂₁ and Se' (mating) position. Φ _{42 in} FIG. 6 is the minimum inner diameter of the wedge body c ₃ of the natural length when the wedge body c ₃ of the retaining tool c is not fitted. The cylinder inner diameter of the intermediate cylinder member b and [Phi _8, when the thickness of Matakusabitai c ₃ and t, is the magnitude relation of the cylinder diameter below (see FIGS. 2, 5).
Φ ₁ <Φ ₄₁ <Φ ₄ , Φ ₄₂ ≒ Φ ₄₁ , Φ ₁ <Φ ₂ <Φ ₃ <Φ ₅ <Φ ₈ , Φ ₃ <Φ ₄ , △ = (Φ ₈ -Φ ₃ )> t × 2
Φ ₇ <Φ ₃ , Φ ₄₁ = Φ ₇

(Procedure for rod connection work)
The rod connecting procedure of this embodiment is shown in FIGS. 8 (1) to (4) and 9 (5) and (6). First screwing the male thread d ₁ of the axial force torque transmission shaft d to the internal thread a ₄ of the recess a ₃ short rod a lower. At that time, the bottom surface of the recess a ₃ [delta] is such strikes and the lower end surface γ of the axial force the torque transmission shaft d (FIG. 8 (1), FIG. 1 (a), (b) refer).
Next, the screw e ₂ of the intermediate cylinder b shown in FIG. 3 is loosened, and the retaining tool c shown in FIGS. 6 and 7 is inserted inside the intermediate cylinder b from the upper opening b ₄ of the intermediate cylinder b. insert. The wedge body c ₃ of the retaining tool c inserted inside expands slightly outward due to the spring force of the bullet support portion c ₂ . The wedge body c ₃ of the retaining tool c is locked to the step portion b ₂ inside the intermediate cylinder body b and stands still. The omission screwing the external thread a ₂ of the lower portion of the protruding shaft a ₁ of the short rod a of the upper fasteners c into the internal thread b ₁ of the intermediate cylinder member b in a state of being inserted into (upper short in FIG. 8 (1) State of the lower end of the rod).

Thereafter, the inside of the intermediate cylinder member b of inserting the missing stop c of the upper short rod, fitting the insertion shaft portion d ₄ of the axial force torque transmitting shaft d screwed to the short rod a lower (FIG. 8 (1 )-(4), FIGS. 9 (5), (6)).
As a result, the upper portion of the enlarged diameter portion d ₅ above the axial force torque transmission shaft d screwed to the upper end of the lower short rod a penetrates the inner space of the wedge body c ₃ , and the enlarged diameter portion d ₅ The step portion b ₂ inside the intermediate cylinder b and the wedge body c ₃ are engaged with each other in the middle of the above (state of FIG. 8 (3)).

At this time, the outer diameter Φ _{2 at} the intermediate position between the wedge body c ₃ engaged with the step portion b ₂ and the enlarged diameter portion d ₅ of the axial force torque transmission shaft d is the position to be fitted. Since the screw e ₂ is loosened, the intermediate cylinder b and the retaining tool c are not fixed structures but can be separated, and the enlarged diameter inclined surface b ₂₁ of the step portion b ₂ is inclined so as to reduce the diameter downward. Therefore, when the upper short rod a and the intermediate cylinder b are pushed down, only one step portion b ₂ of the wedge body c ₃ and the step portion b ₂ that is engaged with the lower rod a and the intermediate cylinder b ₂ descends downward, and the diameter reduction portion d ₇ is reduced. after moving to the outer periphery of the base portion _{d 3} (FIG. 8 (3), (4) and 9 (5), (6) refer).
On the other hand, when the upper short rod a is somewhat lowered, the protruding shaft a ₁ is started to push down the ring-shaped operation member c ₁ of the detachment preventing member c (see FIG. 8 (4)). Further, when the upper short rod a is pushed down, the wedge body c ₃ of the retaining tool c is pushed down to the peripheral surfaces of the maximum diameter portion d ₆ and the reduced diameter portion d ₇ of the insertion shaft portion d ₄ (FIG. 8 (4)). , See FIGS. 9 (5) and 9 (6)). Then, descending in a state in which the shaft lower end surface of the protruding shaft a ₁ of the upper short rod a alpha strikes the upper end surface of the insertion shaft portion d ₄ beta is stopped (see FIG. 9 (6)). In this state, the wedge body c ₃ is at the position of the reduced diameter portion d ₇ .

In FIGS. 9 (5) and 9 (6), the step portion b ₂ is in contact with the outer circumference of the base portion d ₃ , and at the same time, the polygon portion b ₃ is fitted with the polygonal prism portion d _2, and the wedge body c ₃ is contracted. in diameter d ₇ facing position. 9 (6) and 1 (a). Then, the axial lower end surface α of the protrusion shaft a ₁ of the upper short rod a and abuts the upper end surface of the insertion shaft portion d ₄ of the axial force torque transmission shaft d beta. Further, the male screw d _{1 at} the lower part of the axial force torque transmission shaft d is screwed with the female screw a ₄ of the recess a ₃ of the lower short rod a, and the lower end surface γ of the male screw d ₁ is the bottom surface δ of the recess a _3. I'm hitting. The state of FIG. 9 (6) is the connected state, and the rod is used as a long rod.

In order to obtain the state shown in FIG. 9 (6), the intermediate cylinder b (upper unit U) in which the upper short rod a and the retaining tool c screwed to the upper short rod a are sealed is replaced with the lower short rod a (unit U). ) Can be connected only by pushing down and inserting it toward the axial force torque transmission shaft d attached to), and basically no tools are required for connection and it can be done quickly (FIGS. 8 (1) to (4), See FIGS. 9 (5) and 9 (6)).

Further, the lower end surface γ of the male screw d ₁ of the axial force torque transmission shaft d and the bottom surface δ of the recess a ₃ of the lower short rod a come into contact with each other. Therefore, the axial force from the upper short rod a is directly transmitted to the lower short rod a through the axial force torque transmission shaft d without passing through the screw portion. Therefore, the screw portion is hardly damaged or deformed due to the axial force.
Then, the rotational torque is screwed with the female screw b ₁ of the male screw a ₂ and the intermediate tubular member b of the protruding shaft a ₁ of the rod a, the intermediate cylinder member b of the polygon section b ₃ and the axial force torque transmission shaft d multi It is transmitted via fitting with the square pillar portion d ₂ and screwing between the male screw d _{1 of} the axial force torque transmission shaft d and the female screw a ₄ of the lower short rod a. Therefore, only the rotational torque acts on the screw portion, and the screw portion that is strong against the rotational torque (screw torque) is less damaged or consumed, and a large rotational torque can be transmitted.

Next, a plurality of short rods a are connected via the intermediate cylinder b, the retaining tool c, and the axial force torque transmission shaft d as described above, but are connected to form a long rod (rod connecting body). Even if there is a pulling operation in this state, even if the rod a and the intermediate cylinder b are pulled up as shown in FIG. 10 (7), between the axial force torque transmission shaft d and the step portion b ₂ of the intermediate cylinder b. The wedge body c ₃ of the retaining tool c engages as a wedge at a position below the maximum diameter portion d ₆ , and the axial force torque transmission shaft d and the intermediate cylinder b are engaged with respect to the pulling up of the short rod a and the intermediate cylinder b. Is strongly integrated, and the connection between the intermediate cylinder b and the axial force torque transmission shaft d cannot be broken. Therefore, the rod connection is not broken by pulling up.

In this way, a long rod made by connecting a plurality of short rods a to make it long, or a long rod made long while being connected, and applying axial force and rotational torque in the underground direction as described above, 5 to 10 m in the ground. The drilling tool at the tip and the screw point of the penetration test are driven or rotated for the test.

(Rod disassembly and separation work for long rods)
When the short rod a is connected as described above to form a long rod, and then disassembled and separated into the short rod a or the unit U (for example, the long rod for the penetration test is pulled up from the ground to be short. The work procedure of the rod a or one unit U) will be described. As mentioned above, the short rod a or the unit U cannot be separated only by pulling up the long rod for the penetration test from the ground. Pull up the long rod so that the connecting part that separates and decomposes is easily separated and disassembled, and the height is set so that it is easy for humans to operate on the ground surface. The procedure is shown in FIG.

When the short rod a (upper long rod) above the separation point of the long rod is pulled up, the step portion b ₂ of the intermediate cylinder b and the wedge body c of the retaining tool c are shown as shown in FIG. 11 (1). ₃ is engaged. After that, the upper part of the long rod is slightly pushed down as shown in FIG. 11 (2) to bring the step portion b ₂ of the intermediate cylinder b into contact with the base portion d _{3 of the} axial force torque transmission shaft d. This state is shown in FIG. 11 (2). In this state, the upper and lower short rods a are directly connected via the axial force torque transmission shaft d. The wedge body c ₃ is in contact with the reduced diameter portion d ₇ (see FIGS. 11 (2) and 11 (3)).

In the state shown in FIG. 11 (3), the headless screw e ₂ is screwed (tightened) inward from the screw hole e ₁ of the intermediate cylinder b, and the tip of the screw e ₂ is pulled out of the stopper c. The moving portion c ₁ is pressed against the outer periphery of the moving portion c ₁ and the intermediate cylinder b is integrally linked by the screw e ₂ (see FIG. 11 (3)). As a result, the retaining tool c is integrated with the intermediate cylinder b and moves up and down. FIG. 18 is an explanatory view showing another example of the retaining tool locking means e using the stopper e ₃ .

As described above, if the upper short rod a (or unit U) is lifted with the retaining tool c linked to the intermediate cylinder b (see FIG. 11 (4)), the wedge body c ₃ moves upward. Since there is no step portion b ₂ of the intermediate cylinder b, there is nothing to lock, the upper short rod a is lifted upward, and the upper and lower short rods a can be separated (see FIG. 11 (5)). After separation, it is better to loosen the screw e ₂ for the next connection work.
In this way, if the long rod is pulled up to the ground and separated from the upper short rod a, and if it is pulled up by one short rod a and the next lower short rod a is located on the ground surface, it is lifted as described above. The short rod a can be separated. By repeating this, the long rod can be disassembled and separated into the short rod a or the unit alone.

The separation is not limited to one short rod a or one unit, and two or three connected rod portions or a plurality of units may be separated.
In this way, after the long rod is formed, the short rod a or the short short rod can be disassembled and separated into a plurality of connected states, so that storage and transportation are easy.

As shown in FIG. 12, the axial force torque transmission shaft d is screwed above the short rod a, and the intermediate cylinder b with the retaining tool c sealed below the short rod a is screwed and connected. If a large number of units U are prepared as one unit U, the axial force torque transmission shaft d of one unit U can be connected by simply inserting it into the intermediate cylinder b of another unit at the site. Work can be greatly shortened. Further, preferably if by adhesively bonded an intermediate cylinder b and the external thread a ₂ of the protruding shaft a ₁ at the bottom of a short rod a the threaded surface with the female screw b ₁ of the intermediate cylinder member b, missing fastener c And the screwing work of this screwed portion are also unnecessary.

FIG. 13 shows another example of the axial force torque transmission shaft d of the embodiment, in which the spanner hooking portion d ₉ for shaft rotation operation is attached to the connecting portion d _{8 in} which the axial force torque transmission shaft of the embodiment is lengthened. in the example provided, the solving bottom of screwing the male screw d ₁ of the internal thread a ₄ and the axial force torque transmission shaft d of the short rod a is rotated to engage a wrench or wrench spanner hook d ₉ This is an example in which a strong rotational torque is applied so that the wrench can be easily removed. Incidentally, remove screwing between the intermediate cylinder b and the short rod a can be used polygon section b _3, easily removed with a wrench of the distal end portion of the polygonal shape.

_On the side surface of the base portion d ₃ , the step portion b ₂ of the intermediate cylinder b is fitted to the outer circumference of the base portion d ₃ , and the upper shoulder portion is the retaining tool c and the reduced diameter of the axial force torque transmission shaft d. The positional relationship between the portion d ₇ and the fixing screw hole e ₁ is measured.

The drawing shown in FIG. 15 is another example of the retaining tool c of the present invention. This is an example in which the bullet support portion c ₂ is bound by an O-ring or ₃ having an inner diameter smaller than the outer diameter of the bullet support portion c ₂ of the retaining tool c of the embodiment. In this example, when the short rod connection or the unit connection and disconnection are repeated, the bullet support portion c ₂ may open and may not return to the original shape. This is an example of improving this by binding with this O-ring or ₃ . In addition to the O-ring or ₃ , a rubber tube, spring, etc. can be fitted to assist the restoring force. Further, when the retaining tool c is made small for smooth vertical operation, the moving body c ₁ and the intermediate cylinder b are integrally linked by forming the moving body c ₁ part into a truncated cone shape. Occasionally, it is possible to correct the deviation of the center line from the intermediate cylinder b at the position of the wedge body c ₃ of the retaining tool c.

In the drawing of the intermediate cylinder shown in FIG. 16, a fairly gentle enlarged diameter inclined surface b ₂₁ is formed above the step portion b _{22 so} that the wedge body c ₃ of the retaining tool c can be moved up and down smoothly. To do.

Drawing shown in FIG. 17, the upper end surface of the axial line a ₅ and the shaft bottom α of protrusion shaft a ₁ of the short rod a having the same axial line a ₅ and the insertion shaft portion d ₄ on the same axial line β If and are shaped so that they are line-symmetrical around the coaxial core line and one is a convex spherical surface and the other is a concave spherical surface that fits with it within a predetermined radius from the axial core line, the shaft bottom surface α and the upper end surface are formed. the β with each other so as to fit in a spherical in a predetermined range, the fulcrum of the intermediate cylinder member b moves from the step portion b ₂ to the spherical mating portion. As a result, the movement constraint of the connecting portion of the upper and lower short rods a is limited to the range of the difference between the inner diameter of the step portion b ₂ and the outer diameter Φ ₅ of the base portion d ₃ of the axial force torque transmission shaft d. As a result, the inner diameter of the step portion b ₂ and the outer diameter Φ ₅ of the base portion d ₃ of the axial force torque transmission shaft d are accurately manufactured, so that the continuous width of the short rod a can be significantly moved laterally at the connecting portion. Can be made smaller.

The rod connecting structure of the present invention can also be effectively used for a rotary shaft rod that transmits the rotational force of a mechanical mechanism.

a short rod a ₁ protruding shaft a ₂ male thread a ₃ recess a ₄ female thread a ₅ axial line b intermediate tubular member b ₁ female thread b _{2, b 22-stage} unit b ₂₁ expanded inclined face b ₃ polygon section b ₄ upper opening b ₅ lower opening b ₆ lower tapered portion c dropout stop c ₁ operating member c ₂ series branch c ₃ wedge d-axis force torque transmitting shaft d ₁ male thread d ₂ polygonal portion d ₃ base d ₄ insertion shaft portion d ₅ expansion Diameter part d ₆ Maximum diameter part d ₇ Reduced diameter part d ₈ Connecting part d ₉ Spanner hooking part e Retainer locking means e ₁ Screw hole e ₂ Screw e ₃ Stopper or ₁ , or ₂ , or ₃ Oring U unit α lower end surface of the protruding shaft _{a 1} (abutting surface)
the upper end face of the β insertion shaft portion d ₄ (abutting surface)
Lower end surface (butting surface) of γ male screw d ₁
bottom of δ recess _{a 3} (abutting surface)
Φ ₁ Outer diameter of the upper end of the insertion shaft part d ₄ Φ ₂ Outer diameter of the enlarged diameter part Φ ₃ Outer diameter of the maximum diameter part d ₆ Φ ₄ Inner diameter of the moving body c ₁ Φ ₄₁ Fitting of the wedge body c _{3 with} the step part Minimum inner diameter dimension at the time Φ ₄₂ Minimum inner diameter dimension when not mating with the step part of wedge body c ₃ Φ ₅ Outer diameter of base d ₃ Φ ₇ Outer diameter of reduced diameter part Φ ₈ Inner diameter of intermediate cylinder b Φ d step Minimum inner diameter of the part Φ x Inner diameter of the moving body Φy Minimum inner diameter when the wedge body contacts the step part

Claims (10)

It is a long rod connection structure used to transmit axial force and rotational torque by connecting multiple short rods in a detachable manner to make a long rod.
A short rod a having the same structure A below, which is arranged and connected above or below, an intermediate cylinder b of the structure B below for connecting the upper and lower short rods a, and a retaining tool c of the structure C below. And the axial force torque transmission shaft d of the following structure D and the retaining tool locking means e of the following structure E for breaking the connection of the short rod a are made into a set of connecting parts, and the dimensions of the component portion. The relationship is as shown in F below, and the constituent parts b to e are incorporated between the short rods a above and below as shown in G below, and the short rods are sequentially detachably connected to the long rod. A long rod connection structure.
A: short rod a disposed above the lower of the is to vertically protruding axis a ₁ of smaller outer diameter than the rod outer diameter at its lower end to the rod axis direction, moreover the male screw a ₂ on the outer periphery of the protrusion shaft engraved, the upper end surface of the short rod provided with a recess a ₃ recessed in the axial direction, and the structure engraved female thread a ₄ on the inner surface of the recess,
B: intermediate tubular member b of the can internal threads b ₁ capable external thread a ₂ and screwing protrusion shaft a ₁ of the short rod a of the upper the cylindrical inner diameter at the top of the cylinder inner surface is [Phi ₈ provided, cylindrical inner surface of the stepped portion b ₂ protruding toward the cylinder center direction causes projecting from the middle, by inclining the upper part of the stepped portion to diameter according upward and expanded inclined face b ₂₁ and, even more the stepped portion a structure in which a polygon section b ₃ which is chamfered into a polygonal shape in a cylindrical inner surface of the lower,
C: The retaining tool c is a vertically short ring-shaped moving body c ₁ having an outer diameter that can be fitted inside the intermediate tubular body b, and is vertically hung downward from the moving body in the outward direction. a plurality of bullet branch c _2, reduced diameter stepped portion b diameter inclined surface ₂ b ₂₁ and the axial force torque transmitting shaft d of the mounted and the intermediate tubular member b to the lower end of each bullet branch c ₂ having a biasing force It is a structure composed of a plurality of wedge bodies c ₃ arranged in a ring shape that can be used with the part d ₇ .
D: axial force torque transmitting shaft d of the can, the upper end surface of the recess a ₃ internal thread a ₄ and screwed to the bottom surface of the recess δ and abutted external thread d of the short rod a lower disposed thereunder has a _1, provided polygonal portion d ₂ which is chamfered polygonal shape to mate with the polygonal section b ₃ located at the inner surface under the intermediate cylinder member b over the same external thread, over the same polygonal section cylindrical base portion d of the outer diameter [Phi ₅ to Se' and said intermediate cylindrical body b diameter inclined surface b ₂₁ of the stepped portion b ₂ protruding on the inner surface of Nuki挿can and the intermediate tubular member b to the polygon portion b ₃ of ₃ is provided, and an insertion shaft portion d ₄ that can be partially inserted inside the ring-shaped moving body c ₁ of the retaining tool c is erected on the base portion, and the insertion shaft portion has an outer diameter Φ at the upper end. which has a reduced diameter portion d ₇ of reduced diameter according to further lower the largest diameter d ₆ of the outer diameter [Phi ₃ in the middle through the enlarged diameter portion d ₅ gradually increases in diameter in accordance with downward from _1, the maximum diameter the outer diameter [Phi ₃ parts d ₆ said base d ₃ of the outer diameter [Phi ₅ smaller than and the maximum diameter d ₆ outer diameter [Phi ₃ and [Phi ₈ - [Phi] ₃ of the distance between the intermediate cylinder member b of the cylinder inner diameter [Phi ₈ of a structure that can be of passing the wedge c ₃ of missing stop c in the gap,
E: The retaining tool locking means e is a means for separating the connected short rods, and the wedge body c ₃ of the retaining tool c faces the reduced diameter portion d _{7 of the} axial force torque transmission shaft d. At this position, the moving body c ₁ can be locked with the intermediate cylinder b by operating from the outside of the intermediate cylinder b so that the retaining tool c can move integrally with the intermediate cylinder b. It is a means by which the locked state can be released by operating the outside of the body b and the short rod can be separated.
F: the missing wedge c ₃ fasteners c is the step part b ₂ or enlarged diameter inclined surface b ₂₁ and wedge c ₃ of the engaged state of inclination of the upper intermediate tubular body b, axial force torque The insertion shaft d ₄ is locked in the middle of the enlarged diameter d ₅ of the transmission shaft d ₄ , and the step portion b ₂ of the intermediate cylinder b comes into contact with the outer periphery of the base d _{3 of the} axial force torque transmission shaft d. At the present position, the upper end surface β of the insertion shaft portion d ₄ abuts on the lower end surface α of the protruding shaft a ₁ of the upper short rod a, and at the same time, the lower end surface γ of the male screw d ₁ of the axial force torque transmission shaft d is downward. a female thread a ₄ of the recess a ₃ rod a contact, and a polygon portion b ₃ of the intermediate cylinder member b is not set vertical dimensions as engaged with polygonal portion d _2,
G: With the retaining tool c of each set inserted inside from the upper opening b ₄ of the intermediate cylinder b and the wedge body c ₃ locked to the step portion b ₂ of the intermediate cylinder b, the same. screwed an internal thread b ₁ of the inner surface upper part of the intermediate tubular member b to the external thread a ₂ below the upper short rod a, also axial force torque transmitted to the internal thread a ₄ of the recess a ₃ at the upper end of the short rod a lower Below the intermediate cylinder b in which the male screw d _{1 of the} shaft d is screwed and the insertion shaft portion d ₄ of the axial force torque transmission shaft d projecting to the lower short rod a is screwed below the upper short rod. is inserted from the opening b _5, it connects the short rod a of the upper and lower by inserting the upper end surface of the insertion shaft portion d ₄ beta until abuts the lower end surface α of the protrusion shaft a ₁ of the upper short rod a , Incorporate the constituent parts b to e of each set as described above, and connect the short rods one after another to make them longer. Intermediate retaining member engagement means e is, a screw hole e ₁ provided in the side wall of the intermediate cylinder member b, when removing the short rod a is a configuration in which screwed a short screw e ₂ in the screw holes, the screw e ₂ the outer peripheral wall of the operating member c ₁ fasteners c omission by causing screwed into the cylindrical body b in a fixed state pressure was missing stop c on the inner wall of the intermediate cylinder member b to the intermediate tubular member b, also a short rod The long rod according to claim 1, wherein when a is connected, the screw e ₂ is moved outward to release the lock so that the moving body c ₁ can be moved up and down so that the rod can be connected. Connection structure. The axial center line a ₅ short rods a and the axial line of the insertion shaft portion d ₄ is in the on the same axial line, yet on the insertion shaft portion d ₄ the shaft bottom α of protrusion shaft a ₁ of the short rod a One abutting shaft bottom surface α is made a concave sphere or a convex sphere so that the end face β is line-symmetrical around the axis center line and within a range of a predetermined radius from the axis center line, and the other upper end surface β abutting on the spherical surface β. Is shaped into a convex spherical surface or a concave spherical surface so that the bottom surface α and the upper end surface β are fitted to each other on a spherical surface within a predetermined range, and the lateral direction of the short rod at the connecting portion of the upper and lower short rods. The long rod connecting structure according to claim 1 or 2, wherein the movement of the long rod is reduced. The axial force torque transmission shaft d has an outer diameter the same as the rod outer diameter between the upper and lower sides of the polygonal pillar portion d ₂ and the male screw d _1, and a spanner hook portion d for shaft rotation operation is provided on the intermediate outer peripheral portion thereof. ₉ is a structure in which the rotationally operable articulation d ₈ forming a connection structure of a long rod according to any one of claims 1 to 3. One each of a short rod a having a structure of A to E below, an intermediate cylinder b, a retaining tool c, an axial force torque transmission shaft d, and a retaining tool locking means e for breaking the connection. A unit that is a connecting unit of a long rod, which is composed of constituent parts, has a dimensional relationship of the constituent parts as shown in F below, and is assembled by connecting the constituent parts a to e as shown in H below.
A: short rod a disposed above the lower of the is to vertically protruding axis a ₁ of smaller outer diameter than the rod outer diameter at its lower end to the rod axis direction, moreover the male screw a ₂ on the outer periphery of the protrusion shaft engraved, the upper end surface of the short rod provided with a recess a ₃ recessed in the axial direction, and the structure engraved female thread a ₄ on the inner surface of the recess,
B: intermediate tubular member b of the can internal threads b ₁ capable external thread a ₂ and screwing protrusion shaft a ₁ of the short rod a of the upper the cylindrical inner diameter at the top of the cylinder inner surface is [Phi ₈ provided, cylindrical inner surface of the stepped portion b ₂ protruding toward the cylinder center direction causes projecting from the middle, by inclining the upper part of the stepped portion to diameter according upward and expanded inclined face b ₂₁ and, even more the stepped portion a structure in which a polygon section b ₃ which is chamfered into a polygonal shape in a cylindrical inner surface of the lower,
C: wherein the detachment preventing member c is urging the intermediate cylinder operating member c ₁ vertically short ring-shaped having an inner diameter that can be fitted into the interior of b, and outwardly is vertically downward from the operation member a plurality of bullet branch c _2, reduced diameter portion of the stepped portion b diameter inclined surface ₂ b ₂₁ and the axial force torque transmitting shaft d of the mounted and the intermediate tubular member b to the lower end of each bullet branch c ₂ having a force It has a structure consisting of a wedge body c ₃ arranged in a ring shape that can be used with d ₇ .
D: axial force torque transmitting shaft d of the can, the upper end surface of the recess a ₃ internal thread a ₄ and screwed to the bottom surface of the recess δ and abutted external thread d of the short rod a lower disposed thereunder has a _1, provided polygonal portion d ₂ which is chamfered polygonal shape to mate with the polygonal section b ₃ located at the inner surface under the intermediate cylinder member b over the same external thread, over the same polygonal section the cylindrical base portion d ₃ of the outer diameter [Phi ₅ which can pass through the intermediate cylindrical body b the stepped portions b ₂ of the enlarged diameter inclined surface b ₂₁ made and projecting on the inner surface of the intermediate cylinder b Nuki挿the polygon portion b ₃ of An insertion shaft portion d ₄ that can be partially inserted inside the ring-shaped moving body c ₁ of the retaining tool c is erected on the base portion, and the insertion shaft portion has an outer diameter Φ _{1 at the} upper end. which has a reduced diameter portion d ₇ of reduced diameter according to further lower the largest diameter d ₆ of the outer diameter [Phi ₃ in the middle through the enlarged diameter portion d ₅ gradually increases in diameter in accordance with downward from the maximum diameter portion outside diameter [Phi ₃ of d ₆ is the [Phi ₈ - [Phi] ₃ of the distance between the outer diameter [Phi ₃ and the intermediate cylindrical body b of the cylinder inner diameter [Phi ₈ of the base d ₃ of the outer diameter [Phi ₅ smaller than and the maximum diameter d ₆ a structure capable of passing a wedge c ₃ fasteners c missing in the gap,
E: The retaining tool locking means e is a means for separating the connected short rods, and the wedge body c ₃ of the retaining tool c faces the reduced diameter portion d _{7 of the} axial force torque transmission shaft d. At this position, the moving body c ₁ can be locked with the intermediate cylinder b by operating from the outside of the intermediate cylinder b so that the retaining tool c can move integrally with the intermediate cylinder b. It is a means by which the locked state can be released by operating the outside of the body b and the short rod can be separated.
F: the missing wedge c ₃ fasteners c is the step part b ₂ or enlarged diameter inclined surface b ₂₁ and wedge c ₃ of the engaged state of inclination of the upper intermediate tubular body b, axial force torque in the upper and lower middle diameter portion d ₅ of the insertion shaft portion d ₄ of the transmission shaft d becomes locked state, also stepped portions b ₂ of the intermediate cylinder member b is Se' the base d ₃ the outer periphery of the shaft force torque transmission shaft d At this position, the upper end surface β of the insertion shaft portion d ₄ abuts on the lower end surface α of the protruding shaft a ₁ of the upper short rod a, and at the same time, the lower end surface γ of the male screw d ₁ of the axial force torque transmission shaft d is downward. The vertical dimensions are set so that the polygon portion b ₃ of the intermediate cylinder b is fitted with the polygonal pillar portion d _{2 while being in contact} with the female screw a ₄ of the recess a ₃ of the rod a.
H: The intermediate cylinder body is in a state where the retaining tool c is inserted inside from the upper opening b ₄ of the intermediate cylinder body b and the wedge body c ₃ is locked to the step portion b ₂ of the intermediate cylinder body b. The female screw b ₁ on the upper part of the inner surface of b is screwed into the male screw a ₂ below the short rod a, and the male screw d _{1 of the} axial torque transmission shaft d is screwed into the female screw a ₄ of the recess a _{3 at} the upper end of the short rod a. Make it fit Retaining member locking means e is, a screw hole e ₁ provided in the side wall of the intermediate cylinder member b, when removing the rod in a configuration screwed a short screw e ₂ in the threaded hole, the intermediate cylinder body b the screws to be an outer peripheral wall of the operating member c ₁ of the detachment preventing member c in be screwed in a fixed state the pressure contact with missing stop c on the inner wall of the intermediate cylinder member b to the intermediate tubular member b, also connects the short rod units of the screw is the operation body c ₁ moves outwardly having a configuration that allows the rod connecting a vertically movable, according to claim 5, wherein when. The axial center line a ₅ short rods a and the axial line of the insertion shaft portion d ₄ is in the on the same axial line, yet on the insertion shaft portion d ₄ the shaft bottom α of protrusion shaft a ₁ of the short rod a One abutting shaft bottom surface α is made a concave sphere or a convex sphere so that the end face β is line-symmetrical around the axis center line and within a range of a predetermined radius from the axis center line, and the other upper end surface β abutting on the spherical surface β. Is shaped into a convex spherical surface or a concave spherical surface so that the bottom surface α and the upper end surface β are fitted to each other on a spherical surface within a predetermined range, and the lateral direction of the short rod at the connecting portion of the upper and lower short rods. The unit according to claim 5 or 6, wherein the movement of the unit is reduced. Rotation in which the axial force torque transmission shaft d has an outer diameter the same as the rod outer diameter between the upper and lower sides of the polygonal pillar portion d ₂ and the male screw d _1, and a spanner hook for shaft rotation operation is formed in the middle. it is a structure in which the operating connection portion d _8, unit according to any one of claims 5-7. An O-ring and between the lower end of the short rod a and the intermediate cylinder b below the lower end surface α and detachment preventing member c of the projection axis a ₁ of the short rods is interposed, in any one of claims 1 to 4 The long rod connection structure described. An O-ring and between the lower end of the short rod a and the intermediate cylinder b below the lower end surface α and detachment preventing member c of the projection axis a ₁ of the short rods is interposed, in any one of claims 5-8 The unit described.

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