JP2018048539A - Connection structure of long rod and connection unit therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and quickly connect a short rod on site and lengthen a life of use of a rod with little deformation or breakage of a threaded portion due to an axial force in a long rod which can transmit a shaft force and a rotational torque by connecting a plurality of short rods.SOLUTION: A long rod is configured with: a short rod a in which a projection shaft a1 is vertically provided at a lower end and a female thread a2 is engraved in a recess at an upper end; an intermediate cylinder b in which a female thread is provided on an upper inner circumference, a step b2 is projected on an intermediate inner circumference, and a polygon part b3 is provided therebelow; a retainer c; an axial force transmission shaft in which a polygonal prism part d2 and a cylindrical base part are provided above a male thread d1 and a diameter-reduced part, a maximum diameter part and an expanded diameter part are provided thereabove; and retainer locking means. The axial force transmission shaft is screwed with the female thread of the lower short rod a. The projection shaft a1 of the upper short rod a is screwed with the female thread of the intermediate cylinder b. The intermediate cylinder b is inserted into the axial force torque transmission shaft of the lower rod and detachably connected.SELECTED DRAWING: Figure 1

Description

In the present invention, 3 to 15 short rods having a length of 0.5 to 1.0 m are joined to make a long rod with a length of 3 to 15 m, and a high axial force (pressing force / blowing force) and rotational torque are obtained. The present invention relates to a rod connecting structure that can be used as a long rod that can be transmitted and can be stored after being disassembled to a length of a short rod when not in use.
As for the use of a long rod of about 5 to 10 m, the weight of the weight, axial force and rotational torque are given 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. It can be used as a rod member. Or, it can be used as a long rod shaft for boring while giving a pressing force / blowing force to the ground excavator in civil engineering construction. Or it is the technique which can be used also as a transmission member of the axial force and rotational force of a rotation mechanism of a machine.

  For geological surveys and underground drilling operations, male and female screws are formed on both ends of a plurality of short rods having a length of about 0.75 m or 1.0 m, and these are screwed together to form 5 to 10 m. A long rod member is attached to the lower end of the rod member, and an excavating tool such as a screw point is attached to the upper portion of the rod member. It was. Or, in underground drilling work or geological sample soil collecting work, multiple short rods are connected to work such as rotating the underground tool at the tip of a long rod member while giving pressing force or striking force A long rod is used. The long rod is assembled by screwing together a plurality of short rods. If a short rod is used, the dimensions are shortened, which makes it easier to store and move, and it is easy to make the required long dimensions. It is to be. Furthermore, even if damaged parts, deformed wear parts, or defective parts occur on the long rod, it can be used as a long rod by replacing only the components of the short rod at that location, and the service life of the long rod is long. There is an advantage that it can be made cheaper than when the entire long rod is replaced.

  Conventionally, these short rods are connected by forming male and female screws on the upper and lower ends of the short rod, and screwing the upper and lower short rods directly with each other, and connecting a plurality of short rods to make them long. It is a structure to do. Examples of this structure are shown in Patent Documents 1 and 2.

In this conventional coupling technique by direct screw threading, all axial force and rotational torque acting on the short rod are transmitted through the threaded portion of the short rod. Due to deformation, breakage, and wear, screwing becomes difficult, making it impossible to make a long rod, or making it difficult to disassemble into a short rod. In addition, the rod life is short.
Further, since screw screwing is a rotation operation performed on site, there is a drawback that it takes a long time to attach and detach. Further, when the screw portion is caulked or burned as described above, it is difficult to screw and remove and disassemble.

JP-A-9-53224 Japanese Patent No. 2678981

  The problem to be solved by the present invention is to solve the problem of the long rod of the conventional direct connection of the short rod by the male screw and the female screw, so that the load of the axial force / rotational torque does not act strongly on the screw portion. Another object of the present invention is to provide a long rod connecting structure that can hardly cause damage to the threaded 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 as follows.
1) A connecting structure of long rods used for detachably connecting a plurality of short rods to form a long rod and transmitting axial force and rotational torque,
A short rod a having the same structure A as shown below, which is arranged above or below, and connected thereto, an intermediate cylinder b having the structure B for connecting the upper and lower short rods a, and a stopper c having the structure C shown below. And an axial force torque transmission shaft d of the following structure D and a stopper locking means e of the following structure E for releasing the connection of the short rod a as a set of connecting parts, and the dimensions of the constituent parts The relationship is as shown in F below, and as shown in G below, the constituent parts b to e are incorporated between the upper and lower short rods a, and the short rods are sequentially removably connected, 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 in the outer periphery of the shaft, the axis direction on the upper end surface of the short rod A recess a ₃ recessed provided, 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 A step b ₂ projecting toward the center of the cylinder is provided in the middle of the tube, and the upper part of the step is inclined so as to increase in diameter upward, thereby forming an enlarged inclined surface b _21. 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 above-mentioned stopper c is provided with a vertically short ring-shaped working body c ₁ having an outer diameter that can be inserted into the intermediate cylindrical body b, and is suspended downward from the working 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 A structure comprising a plurality of wedge bodies c ₃ arranged in an annular shape so as to be in contact with the part d ₇ ,
D: The above-described axial force torque transmission shaft d is a male screw d that engages with the female screw a ₄ of the recess a _{3 on} the upper end surface of the short rod a disposed below and abuts against the bottom surface δ of the recess. 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 A cylindrical base portion d having an outer diameter Φ _{5 that} can be inserted into the polygonal portion b ₃ of the intermediate cylinder b and is in contact with the enlarged diameter inclined surface b ₂₁ of the stepped portion b ₂ projecting from the inner surface of the intermediate cylinder b. _3, and an insertion shaft portion d ₄ that can be partially inserted into the inside of the ring-shaped operating body c ₁ of the retaining stopper c is provided on the same base portion, and the insertion shaft portion has an outer diameter Φ at the upper end. further according to the downward consist of _one and the maximum diameter portion 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 the lower Which has a reduced diameter portion d ₇ whose diameter is reduced, the outer diameter [Phi ₃ and the intermediate cylinder of the maximum diameter portion d the outer diameter [Phi ₃ is the base d ₃ of small and maximum diameter d ₆ than the outer diameter [Phi ₅ of ₆ a structure capable of passing a wedge c ₃ of the [Phi ₈ - [Phi] ₃ of the omission on the gap stopper c spacing between cylinder inner diameter [Phi ₈ of the body b,
E: wherein the missing stop locking means e is a means for separating a short rod which is connected, omission reduced diameter portion d ₇ facing the wedge member c ₃ fasteners c the axial force torque transmitting shaft d the position in the middle cylinder b and missing in the locked state stop c in operation from outside of the operating member c ₁ intermediate cylindrical body b which together with the intermediate tubular member b can to move integrally, moreover intermediate cylinder It is a means capable of releasing the locking state by an outer operation of the body b and making the short rod separable,
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 middle of the enlarged 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 in Se' the base d ₃ the outer periphery of the shaft force torque transmission shaft d its upper end surface of the insertion shaft portion d ₄ beta at position are in contact with the lower end face of the protruding shaft a ₁ of the upper short rod a alpha, at the same time the axial force torque transmission shaft d of the external thread d ₁ is the lower end surface γ of the lower 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: each set of missing stop c in a state in which the wedge c ₃ is inserted into the inside from the upper opening b ₄ were engaged with the stepped portion b ₂ of the intermediate cylinder member b and interior of the intermediate cylinder member b, the The internal thread b ₁ at the upper part of the inner surface of the intermediate cylinder b is screwed into the lower male thread a ₂ of the upper short rod a, and the axial force torque is transmitted to the female thread a ₄ of the recess a _{3 at} the upper end of the lower short rod a. a state screwed a male thread d ₁ of the shaft d, below the intermediate cylinder b screwed to the insertion shaft portion d ₄ of the axial force torque transmitting shaft d which projects to a short rod a lower to a short rod below the upper The upper and lower short rods a are connected by inserting from the opening b ₅ until the upper end surface β of the insertion shaft portion d ₄ is in contact with the lower end surface α of the protruding shaft a ₁ of the upper short rod a. Incorporating each set of component parts b to e as described above, and sequentially connecting the short rods to make them long,
2) When removing the short rod a with a configuration in which the retaining member e is provided with the screw hole e ₁ on the side wall of the intermediate cylinder b and the short screw e ₂ is screwed into the screw hole, the 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 is of configuration to allow the operation member c ₁ by solving the locking by moving the screw e ₂ outward may rod coupling as vertically movable, the length of the 1), wherein 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 abutment is made so that the upper end surface β of the insertion shaft part d ₄ is line symmetric about the axis and within a predetermined radius from the axis. The bottom surface α of the shaft is a concave spherical surface or a convex spherical surface, and the upper end surface β in contact with the other is shaped so as to be a convex spherical surface or a concave spherical surface. The long rod connecting structure 4) according to the above 1) or 2) in which the lateral movement of the short rod at the connecting portion of the upper and lower short rods is reduced. an outer diameter between the upper and lower the polygonal portion d ₂ and male thread d ₁ has the same outer diameter as the rod outer diameter, a rotating operation of forming the pivoting operating wrench hanging section d ₉ in between the outer peripheral portion is a structure in which a connecting portion d _8, wherein the 1) to 3) and the short rod a structure of the connection structure 5) below A~E elongated rod according to any one of the intermediate cylinder b, missing fastener c, an axial force torque transmission shaft d, and a retaining member locking means e for releasing the connection. The unit A which is a connecting unit of the long rod, which is assembled by connecting the component parts a to e as shown in the following F and having the dimensional relationship of the constituent parts as shown in the following H, is arranged above and below the above. that the short rods a, and 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 is a provided recess a ₃ recessed in the axial direction, and the structure engraved female thread a ₄ on the inner surface of the recess, the
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 A step b ₂ projecting toward the center of the cylinder is provided in the middle of the tube, and the upper part of the step is inclined so as to increase in diameter upward, thereby forming an enlarged inclined surface b _21. 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 above-mentioned stopper c is provided with a vertically short ring-shaped working body c ₁ having an inner diameter that can be inserted into the intermediate cylindrical body b, and is attached downwardly from the working body. 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 a structure consisting of d ₇ and Se' be annularly arranged wedge c ₃ Prefecture,
D: The above-described axial force torque transmission shaft d is a male screw d that engages with the female screw a ₄ of the recess a _{3 on} the upper end surface of the short rod a disposed below and abuts against the bottom surface δ of the recess. 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 A cylindrical base portion d _{3 having} an outer diameter Φ _{5 that} can be inserted into the polygon portion b ₃ of the intermediate cylinder b and can pass through the enlarged diameter inclined surface b ₂₁ of the step portion b ₂ projecting from the inner surface of the intermediate cylinder b. Further, an insertion shaft portion d ₄ that can be partially inserted inside the ring-shaped operating body c ₁ of the retainer c is provided on the same base portion, and the insertion shaft portion has an outer diameter Φ _{1 at the} upper end. Furthermore 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 downwardly from follow the lower Which has a reduced diameter portion d ₇ reduced in diameter Te, and an outer diameter [Phi ₃ of the maximum diameter portion d the outer diameter [Phi ₃ is the base d ₃ of small and maximum diameter d ₆ than the outer diameter [Phi ₅ of ₆ intermediate a structure capable of passing a wedge c ₃ of the [Phi ₈ - [Phi] ₃ of the omission on the gap stopper c spacing between cylinder inner diameter [Phi ₈ of the cylindrical body b,
E: wherein the missing stop locking means e is a means for separating a short rod which is connected, omission reduced diameter portion d ₇ facing the wedge member c ₃ fasteners c the axial force torque transmitting shaft d the position in the middle cylinder b and missing in the locked state stop c in operation from outside of the operating member c ₁ intermediate cylindrical body b which together with the intermediate tubular member b can to move integrally, moreover intermediate cylinder It is a means capable of releasing the locking state by an outer operation of the body b and making the short rod separable,
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 and has at its upper end face of the insertion shaft portion d ₄ beta position abuts against the lower end surface α of the protrusion shaft a ₁ of the upper short rod a, simultaneously axial force the lower end surface γ of the male thread d ₁ of the torque transmission shaft d below contact with the internal thread a ₄ of the recess a ₃ rods a person, and a polygon portion b ₃ of the intermediate cylinder member b is not set vertical dimensions as engaged with polygonal portion d _2,
H: exits the stopper c in a state in which the upper opening b ₄ and interiors engages the wedge c ₃ is inserted inside the stepped portion b ₂ of the intermediate cylinder member b of the intermediate cylinder member b, the intermediate tubular member screwed b internal threads b ₁ of the inner surface upper part of the male screw a ₂ below the short rod a, threaded male screw d ₁ of the axial force torque transmission shaft d to the internal thread a ₄ of the recess a ₃ at the upper end of the short rod a Combined state,
6) In the case where the retaining member locking means e is provided with a screw hole e ₁ in the side wall of the intermediate cylinder b and a short screw e ₂ is screwed into the screw hole, the screw is attached to the intermediate cylinder. 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 it is of configuration to allow the rod connecting the operating member c ₁ by moving the screw outward as vertically movable when connecting, the 5) the axial line a ₅ unit 7) short rod a according 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 spherical surface or a convex spherical surface so as to be line symmetric and within a predetermined radius from the axial center line, and the other The upper end surface β in contact with this is shaped to be a convex spherical surface or a concave spherical surface, and the shaft bottom surface α and the upper end surface β are fitted to each other with a spherical surface within a predetermined range, and the upper and lower short rods are connected. the lateral movement of the short rod at a portion was small, the 5) or 6) unit 8) axial force torque transmission shaft d of described, the outer diameter between the upper and lower and its polygonal section d ₂ and male thread d ₁ There have the same outer diameter as the rod outer diameter, a structure in which the rotationally operable articulation d ₈ forming the pivoting operating wrench placement portion in the middle, of the 5) to 7) according to any one unit 9 1) to 4), wherein O-rings are interposed between the lower end surface α of the projecting shaft a ₁ of the short rod ₁ and the stopper c, and between the lower short rod a and the lower end of the intermediate cylinder b. connecting structure 10) between and below the lower end surface α and detachment preventing member c of the projection axis a ₁ of the short rod of the long rod according to any one An O-ring between the lower end of the short rod a and the intermediate cylinder b is interposed, said 5) to 8) of the unit according to any one.

In the present invention, the axial force is such that the lower end surface α of the projecting shaft a ₁ below the upper short rod a hits the upper end surface β of the insertion shaft portion d ₄ of the axial force torque transmission shaft d, and the axial force torque transmission. The lower end surface γ of the male screw d _{1 at} the lower end of the shaft d hits the bottom surface δ of the recess a ₃ formed on the upper end surface of the lower short rod a, and the axial force in the axial direction of the short rod a Since it is directly transmitted downward via the upper and lower abutting surfaces (α, β), (γ, δ) without any intervening, deformation or damage of the screw portion hardly occurs. Further, the rotational torque of the rod can pass large torque because mating with a polygonal portion d ₂ of the polygon section b ₃ and the axial force torque transmission shaft d of the intermediate cylinder member b. There are a screw portion of a male screw a ₂ of the projecting shaft a ₁ and a female screw b ₁ of the intermediate cylinder b, a male screw d _{1 of} the axial force torque transmission shaft d, and a screw portion of a female screw a ₄ of the short rod a below. Since only torque acts, there is little deformation or damage.

The connecting operation of the short rod a having a length of about 0.75 to 1.00 m and an outer diameter of 19 mm according to the present invention having configurations A to F is performed by opening the stopper c in the middle cylinder b in advance at the 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 slightly longer than the length of the short rod a, and is slightly heavier than the short rod alone. Therefore, storage and transportation of this unit is easy 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 inserting the axial force torque transmission shaft d above the unit into the intermediate cylinder b below the other unit. . Furthermore, if the intermediate cylindrical body b below the other unit is fitted into the uppermost exposed axial force torque transmission shaft of the connected units, a large number of the units are connected to achieve the required length. That is, a plurality of units can be connected easily and quickly until the required length is reached. In this state, use with axial force and rotational torque.

In this unit connected state, it engaged the unit connecting wedge of body be added pulling Ru force upward detachment preventing member c c ₃ and the stepped portion b ₂ of the intermediate cylinder member b as shown in FIG. 10, wedge c ₃ acts as a wedge between the outer periphery of the axial force torque transmitting shaft d and the stepped portion b _2, there is no possibility to separate them. When a downward axial force is applied to the unit connection body, the above-mentioned use state is restored.

When this unit connection body is used as a long rod and then disassembled into a single unit, as shown in FIG. 11, the position where the unit connection body is first separated is easy to disassemble / separate (for example, the ground surface). Pull up. 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 stopper c is integrated with the intermediate cylinder b at this position using the stopper stopper e. In this state, the wedge member c ₃ of missing stop c if lifted upward units there always above the stepped portions b ₂ of the intermediate cylinder member b, between the units without locking can be separated. Thus, it is possible to easily separate and disassemble the unit (unit) from the unit connection body. It should be noted that the unit connected body after use is not only separated into a single unit, but may be disassembled into a plurality of unit connected states having a length and weight with less trouble in transportation and storage. As a method for separating and disassembling a long rod into a short rod or a single unit, as shown in FIG. 18, the screw hole e ₁ is opened without screwing the short screw e ₂ into the screw hole e ₁ as in the embodiment. The stopper e ₃ is screwed into the screw hole e ₁ when the short rod is pulled up to be separated and disassembled into a short rod and a single unit, and the tip portion thereof is inserted into the intermediate cylinder b to prevent it from coming off. There is also a method in which c is fixed 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 It is only necessary to insert and insert into the intermediate cylinder b of another unit, and the connecting operation can be greatly shortened. Of course, it is also possible to perform a unit work on site.
In addition, although it is advantageous in terms of workability, transportation, and storage in the field, the component parts a to e of the present invention are advantageously connected and assembled as a unit before the factory / shipment. Of course, they can be transported in a partially connected state, and these can be connected and assembled on site.

Further, as shown in FIG. 14, in the case where the O-ring or ₂ is provided on the outer periphery of the polygonal column part d ₂ at the lower end of the intermediate cylinder b and the upper end surface of the short rod a, the lower end of the intermediate cylinder b and the short rod a Sediment can be prevented from entering through the gap with the upper end surface.

O-ring or ₁ so as to be in pressure contact with the inner wall of the intermediate cylinder b between the lower end of the projecting shaft a ₁ below the rod a and the upper surface of the operating body c ₁ of the retainer 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 It prevents the adhesive from adhering to the stopper c and stopping the movement of the stopper c and losing its function.
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 view 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 stepped portion of FIG. FIG. 3 is a longitudinal 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 the embodiment. FIG. 6 is a front view showing the retainer according to the embodiment. FIG. 7 is a bottom view showing the stopper of the embodiment. FIG. 8 is an explanatory view showing a process of rod connection in the embodiment. FIG. 9 is an explanatory view showing the 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 the rod removal process of the embodiment. FIG. 12 is a partially cutaway structure explanatory view of a unit in which an intermediate cylindrical body in which a stopper is enclosed at the lower end of the rod and an axial force torque transmission shaft is 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 illustrating an example of an interlaced state of the O ring in the embodiment. FIG. 15 is an explanatory view of another embodiment of the step portion of the intermediate cylinder b of the present invention. FIG. 16 is an explanatory view showing another example of the stopper c of the present invention. FIG. 17 is an explanatory view showing the fitting of an example in which the shaft bottom surface α of the present invention and the upper end surface fitted to the shaft bottom surface are spherical around the axis. FIG. 18 is an explanatory view showing an operation procedure of another example of the stopper preventing means when the long rod is pulled up to form the short rod a or a single unit.

The material of the rod is made of a metal that can sufficiently withstand axial force and rotational torque, and the stopper may be made by machining an alloy, or may be made of strong plastic.
Missing stop locking means are examples in the screw hole e ₁ and the screw hole e ₁ to the operating member c ₁ with screws e ₂ of headless which is screwed is wedge c ₃ thereunder reduced diameter portion d ₇ is locked to the intermediate cylinder b at a position where it comes into contact with the intermediate cylinder b, and the stopper c is moved together with the intermediate cylinder b. However, other locking mechanisms that do not protrude so much from the intermediate cylinder b 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 a screw hole e ₁ without screwing the short screws e ₂ as shown and remain open, so as to use by connecting the short rod. The screw hole e ₁ is left open and the muddy water on the outer periphery of the rod is allowed to enter from the screw hole e ₁ before use. 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. At the time when the short rod connected up and down is lifted and the short rod is disconnected and disassembled into the short rod, a long stopper e ₃ or a shaft body is attached to the screw hole e ₁ of the pulled up intermediate cylinder b. A method of inserting from the outside and fixing the stopper c in the intermediate cylinder b can also be adopted.
Also, when connecting a plurality of short rods or units to make a long rod, the lowermost and uppermost ends may be male or female threads for connection with the lower and upper members, or polygonal column parts. -When using a polygon part or spanner hanging part, an auxiliary screw connecting member having an appropriate structure may be attached to the lowermost rod or the uppermost short rod. Alternatively, the external thread of the projecting shaft below the short rod, the external thread of the lower part of the connected axial force torque transmission shaft, or the internal thread of the recess at the upper end can be used as it is for connection with other members.
Furthermore, the contact surface between the shaft bottom surface α of the projecting shaft a ₁ of the short rod a and the upper end surface β of the insertion shaft portion d ₄ of the axial force torque transmission shaft d that contacts the shaft α is in a large area. It is preferable to do this.
The shaft bottom surface α and the upper end surface β can be flat, or the shaft center line a ₅ of the short rod a and the shaft center line of the insertion shaft portion d ₄ are the same shaft center line as shown in FIG. 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, a curved surface, for example, a spherical receiver, in which the shaft center line a ₅ of the short rod a and the shaft center line of the insertion shaft portion d ₄ are matched and fitted with the same radius of curvature around the shaft center line. 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 fulcrum moves from the step portion b ₂ to the fitting portion. Thereby, the lateral movement of the fitting surface is limited to the range of the difference between the inner diameter of the step b ₂ and the outer diameter Φ ₅ of the base d ₃ of the axial force torque transmission shaft d. Therefore, by fabricating better outer diameter [Phi ₅ of the base portion d ₃ of the stepped portions b ₂ of the inner diameter and the axial force torque transmission shaft d accuracy significantly movement in the lateral direction by the connecting portion connecting the width of the lot Can be made smaller.

(Example)
1 to 6 will be described with reference to the drawings. The embodiment is an example in which a 0.95 m short rod a is connected by 10 stages with a connecting part length of 50 mm and a unit of about 1.0 m to form a long rod having a length of about 10 m. It is a long rod for giving axial force (weight load) and rotational torque to (not shown).

(Explanation of symbols)
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 projecting shaft suspended from the lower part of the short rod a, a ₂ is a male screw engraved on the outer periphery of the projecting shaft, a ₃ is a recess provided at the upper end surface of the short rod a, a ₄ female screw which is engraved on the inner surface of the recess, a ₅ are axial line a rod center line of the short rod. b is a cylindrical intermediate cylinder having the same outer diameter as that of the short rod a shown in FIG. 3 and has a length of about 50 mm, b ₁ is an internal thread engraved on the inner surface of the upper part of the intermediate cylinder, b ₂ Is a step portion in which an inner diameter surface provided on an intermediate inner surface of the intermediate cylinder b projects inward, b ₂₁ is a diameter-increasing inclined surface facing the center of the cylinder of the step portion b ₂ , and the intermediate cylinder b It is an inclined surface in which the inner diameter of the expanded diameter inclined surface is increased. b ₃ is a polygonal portion chamfered by a hexahedron formed on the lower inner surface of the step 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 screw retaining face c having a screwdriver locking groove for separating the rod, e ₁ is a screw hole of the screw, c is a retaining tool manufactured by integrally processing the alloy, c ₁ is a ring-shaped working body at the upper part of the retaining stopper, c ₂ is a plurality of thin elastic elastic support portions extending downward from the lower end of the operating body c ₁ , and c ₃ is a lower 4 of the elastic support portion c ₂ . A lower wedge body that is slightly narrowed downwardly at a location, d is an axial force torque transmission shaft shown in FIG. 5, d ₁ is a male screw engraved in the lower part, and d ₂ is above the male screw. polygonal portion of the formed hexagonal prism shape, outer diameter smaller than the outer diameter of d ₃ is polygonal portion d ₂ provided above the same polygonal section d ₂ A cylindrical base portion of Φ ₅ , d ₄ is an insertion shaft portion protruding above the base portion, d ₅ is an intermediate between the distal end outer diameter Φ ₁ where the outer diameter of the insertion shaft portion d ₄ is small and the insertion shaft portion d ₄ . A diameter-expanded portion that expands toward the maximum diameter portion d ₆ where the outer diameter of the diameter increases is the maximum diameter portion d ₆ , and d ₇ is a diameter-reduced portion of the reduced diameter portion from the maximum diameter portion d ₆ to the base portion d ₃ . Side surface of the base d ₃ is fitted stepped portions b ₂ of the intermediate cylinder member b on the outer periphery of the base portion d _3, the upper shoulder missing fastener c and, the reduced diameter portion of the axial force torque transmission shaft d d _7. Furthermore, the consistency of the positional relationship with the fixing screw hole e ₁ is measured. e is a stopper preventing means for locking the stopper c to the intermediate cylinder b, e ₁ is a screw hole provided in the outer peripheral wall of the intermediate cylinder b of the stopper stopper, and e ₂ is It is a headless screw that is screwed into the screw hole e ₁ to lock the operating body c ₁ of the stopper c to the intermediate cylinder b to be in a fixed state, and a screwing locking groove is provided at the screw end. Is provided.

Further, α is the bottom surface (lower end surface) of the protruding shaft a ₁ , β is the upper end surface of the enlarged diameter portion d ₅ of the axial force torque transmission shaft d, and γ is the lower end surface of the external thread d ₁ of the 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. In FIG. 1, ε is a gap in a 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 at the enlarged diameter portion d ₅ that expands in the downward direction, the outer diameter of the maximum diameter portion d ₆ is Φ _3, and the reduced diameter portion d ₇ below the maximum diameter portion d ₆ is the outer diameter and Φ _7. Further, the outer diameter of the lower base portion d ₃ is Φ ₅ , the inner diameter of the ring-shaped operating body c ₁ of the stopper c is Φ _4, and Φ ₄₁ is a diameter-inclined slope of the wedge portion c _{3 and the} stepped 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 natural-length wedge body c ₃ when the wedge body c ₃ of the stopper 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

(Rod connection work procedure)
The rod connecting procedure of this embodiment is shown in FIGS. 8 (1) to (4) and FIGS. 9 (5) and 9 (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, keep in loosening the screws e ₂ of the intermediate cylinder member b shown in FIG. 3, the inside of the intermediate cylinder member b from the upper opening b ₄ of the intermediate cylinder member b omission 6 and 7 stop c insert. Wedge c ₃ of inserted missing stop c therein are somewhat adapted to spread outwardly I by the spring force of the bullet Branch c _2. Wedge c ₃ fasteners c exit is locked to the stepped portion b ₂ inside the intermediate cylinder b and stationary. 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) The 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 ) To (4), FIGS. 9 (5) and 9 (6)).
Thus, the upper portion of the upper portion of the enlarged diameter portion d ₅ of the axial force torque transmitting shaft d which is screwed to the upper end of the short rod a of downward Tsukinui the inner space of the wedge c _3, the enlarged diameter portion d ₅ In the middle of the step, the step b _{2 on} the inner side of the intermediate cylinder b and the wedge body c ₃ are engaged (state shown in 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 b ₂ and the diameter-enlarged portion d ₅ of the axial force torque transmission shaft d is a position to be fitted. Since the screw e ₂ is loosened, the intermediate cylinder b and the stopper c are not fixed structures but can be separated and inclined so that the diameter-increasing inclined surface b ₂₁ of the step b ₂ is reduced in diameter downward. are so only wedge c ₃ and the stepped portion one of the stepped portion b ₂ of b _2, which had been engaged depressing short rod a · intermediate tubular member b of the upper descends downward, the reduced diameter portion d ₇ 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)). Furthermore, depressing the upper short rod a, wedges c ₃ of missing stop c is maximum diameter d ₆ of the insertion shaft portion d _4, pressed down on the peripheral surface of the reduced diameter portion d ₇ (FIG. 8 (4) FIG. 9 (5), (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, wedge c ₃ is in the position of the reduced diameter portion d _7.

FIG. 9 (5) and (6), the stepped portion _{b 2} is in contact with the outer periphery of the base portion _{d 3,} the polygon section _{b 3} simultaneously engaged with polygonal portion _{d 2,} wedge _{c 3} is condensed in diameter d ₇ facing position. 9 (6) and 1 (a). The shaft lower end surface α of the protruding shaft a ₁ of the upper short rod a abuts against the upper end surface β of the insertion shaft portion d ₄ of the axial force torque transmission shaft d. Further, the external thread d ₁ of the lower axial force torque transmitting shaft d is the bottom of the recess a ₃ is the lower end surface γ of the male thread d ₁ screwed with the internal thread a ₄ of the recess a ₃ short rod a lower δ I'm hitting. The state shown in FIG. 9 (6) is a connected state, which is a long rod use state.

  9 (6), the intermediate cylinder b (upper unit U) in which the upper short rod a and the stopper c screwed on the upper short rod a are sealed is moved to the lower short rod a (unit U). ) Attached to the axial force torque transmission shaft d attached to the shaft d), and can be connected simply by inserting it, and basically no tools are required for the connection (FIGS. 8 (1) to (4), (Refer to Drawing 9 (5) and (6)).

Furthermore, 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 contact 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 part is hardly damaged or deformed by 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 prism 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. Accordingly, only the rotational torque acts on the screw portion, and the screw portion that is strong against the rotational torque (torsion torque) is less damaged and consumed, and a large rotational torque can be transmitted.

Next, a plurality of short rods a are connected via the intermediate cylinder b, the stopper c, and the axial force torque transmission shaft d as described above, but are connected to form a long rod (rod connecting body). even pulling operated state, even if the rod a · intermediate tubular member b is raised as shown in Figure 10 (7), between the stepped portions b ₂ of the axial force torque transmitting shaft d and the intermediate cylinder b and axial force torque transmitting shaft d and the intermediate tubular member b against pulling the engage as a wedge in a short rod a · intermediate tubular member b wedge c ₃ fasteners c is in the lower position of the maximum diameter portion d ₆ missing Are strongly integrated and the connection between the intermediate cylinder b and the axial force torque transmission shaft d is not broken. Therefore, the rod connection is not released by pulling up.

  In this way, a plurality of short rods a are connected to each other to form a long rod or a long length while being connected, and axial force and rotational torque are applied in the underground direction as described above to give 5-10 m in the ground. Test by driving or rotating the drilling tool at the tip and the screw point of the penetration test.

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

When pulling a short rod a more separated to point above the long rods (upper elongated rod), the wedge body c of the stepped portion b ₂ a detachment preventing member c of the intermediate cylinder member b as shown in FIG. 11 (1) ₃ is engaged. Thereafter, the upper long rod as press down slightly in FIG. 11 (2), contacting the stepped portion b ₂ of the intermediate cylinder member b to the base d ₃ of the axial force torque transmission shaft d. This state is shown in FIG. In this state, the upper and lower short rods a are directly connected via the axial force torque transmission shaft d. The wedge _{c 3} is in contact with the reduced diameter portion _{d 7} (FIG. 11 (2), see (3)).

In the state of FIG. 11 (3), the screws e ₂ of headless from the screw hole e ₁ of the intermediate cylinder member b put screws toward the inside (tighten), the stopper c passes through the tip of the screw e ₂ is pressed against the outer periphery of the operating portion c ₁ to coordinate integrally by operation portion c ₁ and the intermediate cylindrical body b and the screws e ₂ (Fig. 11 (3) refer). As a result, the stopper c is moved up and down integrally with the intermediate cylinder b. Figure 18 is an explanatory diagram showing another example of a detachment preventing member locking means e using stoppers e _3.

As described above, the detachment preventing member c (see FIG. 11 (4)) if lifted intermediate cylinder b short rod in a state of being associated upper to a (or unit U), wedge c ₃ Above since there is no stepped portion b ₂ of the intermediate cylinder member b gone those locks, short rod a of the upper is lifted upward, the short rod a of the upper and lower can be separated (see FIG. 11 (5)). After separation is a good idea to loosen the screws e ₂ for the next coupling operation.
As described above, when the long rod is pulled up to the ground and separated from the upper 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.

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.
Thus, since it can be disassembled and separated into a plurality of connected states of short rods a or short short rods after making a long rod, storage and transportation are easy.

In addition, as shown in FIG. 12, an axial force torque transmission shaft d is screwed above the short rod a, and an intermediate cylinder b in which a stopper c is enclosed is screwed and connected below the short rod a. If a large number of units U are prepared as one unit U, on-site connection can be achieved simply by inserting the axial force torque transmission shaft d of one unit U into the intermediate cylinder b of another unit. 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 The sealing of the screw and the screwing operation of this screwing part are also unnecessary.

Figure 13 is a further example of the axial force torque transmission shaft d embodiment, a spanner hook d ₉ for axial rotation operation articulation d ₈ with a longer axis length of axial force torque transmission shaft examples 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 to enable easy removal. 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.

Incidentally, the side surface of the base d ₃ is fitted stepped portions b ₂ of the intermediate cylinder member b on the outer periphery of the base portion d _3, the upper shoulder missing fastener c and diameter of axial force torque transmission shaft d The consistency of the positional relationship with the part d ₇ and further with the fixing screw hole e ₁ is measured.

The drawing shown in FIG. 15 is another example of the stopper c of the present invention. With at O-ring or ₃ having a small inner diameter than the outer diameter of the exit stop bullets Branch c ₂ and c of Example is an example of binding a bullet branch c _2. In this example, if the repeated short rod coupling or units connected to the removal, there is a possibility that not return to its original shape is open bullet Branch c _2. This is an example of improving this by binding with this O-ring or ₃ . In addition to O-ring or ₃ , a rubber tube or a spring can be fitted to assist the restoring force. Further, when the stopper c is made small for smooth up and down operation, the operating body c ₁ and the intermediate cylinder b are integrally linked by making the operating body c ₁ part into a truncated cone shape. Occasionally, it is possible to correct the deviation of the center line of the intermediate tubular member b at a position of the wedge c ₃ of detachment preventing member c.

In the drawing of the intermediate cylinder shown in FIG. 16, a fairly gentle diameter-expanding inclined surface b ₂₁ is formed above the step b ₂₂ so that the vertical movement of the wedge body c ₃ of the stopper c is smoothly performed. 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 Are shaped symmetrically around the coaxial core line, and in the range of a predetermined radius from the axial center line, one is a convex spherical surface and the other is a concave spherical surface fitted with it, and the shaft bottom surface α and the upper end surface β is fitted with a spherical surface within a predetermined range, and the fulcrum of the intermediate cylinder b moves from the step b ₂ to the spherical fitting portion. As a result, the restriction on the movement 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 b ₂ and the outer diameter Φ ₅ of the base d ₃ of the axial force torque transmission shaft d. Accordingly, the inner diameter of the step 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, thereby greatly increasing the lateral movement of the connecting portion in the continuous width of the short rod a. Can be made smaller.

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

a short rod a ₁ projecting shaft a ₂ male screw a ₃ recess a ₄ female screw a ₅ shaft center line b intermediate cylinder b ₁ female screw b ₂ and b ₂₂ stepped portion b ₂₁ enlarged diameter inclined surface b ₃ polygon portion b ₄ upper opening b ₅ downward opening b ₆ taper part at the lower end c retaining stopper c ₁ working body c ₂ bullet support part c ₃ wedge body d axial force torque transmission shaft d ₁ male screw d ₂ polygonal column part d ₃ base part d ₄ insertion shaft part d ₅ expansion diameter d ₆ maximum diameter d ₇ reduced-diameter portion d ₈ articulation d ₉ spanner hook e missing stop locking means e ₁ screw hole e ₂ screws e ₃ stopper _{or 1,} or 2, or ₃ O-ring U unit α Lower end surface of projecting shaft a ₁ (butting surface)
β Upper end surface (butting surface) of insertion shaft portion d ₄
γ Male thread d ₁ lower end surface (butting surface)
δ bottom surface of recess a ₃ (butting 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 operating body c ₁ Φ ₄₁ fitting with the step part of the wedge body c ₃ Minimum inner diameter when combined Φ ₄₂ Wedge body c ₃ Minimum inner diameter when not fitted Φ ₅ Outer diameter of base d ₃ Φ ₇ Outer diameter of reduced diameter Φ ₈ Inner diameter of intermediate cylinder b Φd Step Minimum inner diameter Φx working body inner diameter Φy minimum inner diameter when the wedge body touches the step

Claims (10)

A connecting structure of long rods used to connect a plurality of short rods in a detachable manner to form a long rod and transmit axial force and rotational torque,
A short rod a having the same structure A as shown below, which is arranged above or below, and connected thereto, an intermediate cylinder b having the structure B for connecting the upper and lower short rods a, and a stopper c having the structure C shown below. And an axial force torque transmission shaft d of the following structure D and a stopper locking means e of the following structure E for releasing the connection of the short rod a as a set of connecting parts, and the dimensions of the constituent parts The relationship is as shown in F below, and as shown in G below, the constituent parts b to e are incorporated between the upper and lower short rods a, and the short rods are sequentially removably connected, Long rod connection structure.
A: The short rod a arranged above and below the lower end has a protruding shaft a ₁ having an outer diameter smaller than the outer diameter of the rod suspended in the axial direction of the rod, and a male screw a ₂ on the outer periphery of the protruding 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 A step b ₂ projecting toward the center of the cylinder is provided in the middle of the tube, and the upper part of the step is inclined so as to increase in diameter upward, thereby forming an enlarged inclined surface b _21. 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 above-mentioned stopper c is provided with a vertically short ring-shaped working body c ₁ having an outer diameter that can be inserted into the intermediate cylindrical body b, and is suspended downward from the working 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 A structure comprising a plurality of wedge bodies c ₃ arranged in an annular shape so as to be in contact with the part d ₇ ,
D: The above-described axial force torque transmission shaft d is a male screw d that engages with the female screw a ₄ of the recess a _{3 on} the upper end surface of the short rod a disposed below and abuts against the bottom surface δ of the recess. 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 A cylindrical base portion d having an outer diameter Φ _{5 that} can be inserted into the polygonal portion b ₃ of the intermediate cylinder b and is in contact with the enlarged diameter inclined surface b ₂₁ of the stepped portion b ₂ projecting from the inner surface of the intermediate cylinder b. _3, and an insertion shaft portion d ₄ that can be partially inserted into the inside of the ring-shaped operating body c ₁ of the retaining stopper c is provided on the same base portion, and the insertion shaft portion has an outer diameter Φ at the upper end. further according to the downward consist of _one and the maximum diameter portion 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 the lower Which has a reduced diameter portion d ₇ whose diameter is reduced, the outer diameter [Phi ₃ and the intermediate cylinder of the maximum diameter portion d the outer diameter [Phi ₃ is the base d ₃ of small and maximum diameter d ₆ than the outer diameter [Phi ₅ of ₆ a structure capable of passing a wedge c ₃ of the [Phi ₈ - [Phi] ₃ of the omission on the gap stopper c spacing between cylinder inner diameter [Phi ₈ of the body b,
E: wherein the missing stop locking means e is a means for separating a short rod which is connected, omission reduced diameter portion d ₇ facing the wedge member c ₃ fasteners c the axial force torque transmitting shaft d the position in the middle cylinder b and missing in the locked state stop c in operation from outside of the operating member c ₁ intermediate cylindrical body b which together with the intermediate tubular member b can to move integrally, moreover intermediate cylinder It is a means capable of releasing the locking state by an outer operation of the body b and making the short rod separable,
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 middle of the enlarged 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 in Se' the base d ₃ the outer periphery of the shaft force torque transmission shaft d its upper end surface of the insertion shaft portion d ₄ beta at position are in contact with the lower end face of the protruding shaft a ₁ of the upper short rod a alpha, at the same time the axial force torque transmission shaft d of the external thread d ₁ is the lower end surface γ of the lower 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: each set of missing stop c in a state in which the wedge c ₃ is inserted into the inside from the upper opening b ₄ were engaged with the stepped portion b ₂ of the intermediate cylinder member b and interior of the intermediate cylinder member b, the The internal thread b ₁ at the upper part of the inner surface of the intermediate cylinder b is screwed into the lower male thread a ₂ of the upper short rod a, and the axial force torque is transmitted to the female thread a ₄ of the recess a _{3 at} the upper end of the lower short rod a. a state screwed a male thread d ₁ of the shaft d, below the intermediate cylinder b screwed to the insertion shaft portion d ₄ of the axial force torque transmitting shaft d which projects to a short rod a lower to a short rod below the upper The upper and lower short rods a are connected by inserting from the opening b ₅ until the upper end surface β of the insertion shaft portion d ₄ is in contact with the lower end surface α of the protruding shaft a ₁ of the upper short rod a. Incorporating each set of component parts b to e as described above, and sequentially connecting the short rods to make them long, 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 when connecting the a is of the configuration that enables the operating member c ₁ by solving the locking by moving the screw e ₂ outward may rod coupling as vertically movable, elongated rod according to claim 1, wherein 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 axial bottom surface α that makes contact with the end surface β is symmetrical about the axial line and within a predetermined radius from the axial center line is a concave spherical surface or convex spherical surface, and the other upper end surface β that makes contact with this Is shaped so as to be a convex spherical surface or a concave spherical surface, and the shaft bottom surface α and the upper end surface β are fitted to each other with 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, wherein the movement of the long rod is reduced. Axial force torque transmission shaft d is the polygonal prism portion d ₂ and the outer diameter between the upper and lower external thread d ₁ has the same outer diameter as the rod outer diameter, axial rotation operating wrench hanging portion d in the middle outer circumference 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. Each of a short rod a having the following structure A to E, an intermediate cylinder b, a retaining member c, an axial force torque transmission shaft d, and a retaining member locking means e for releasing the connection. A unit which is a connecting unit of long rods, which is composed of constituent parts and has a dimensional relationship between the constituent parts as shown in F below and is assembled by connecting the constituent parts a through e as shown in H below.
A: The short rod a arranged above and below the lower end has a protruding shaft a ₁ having an outer diameter smaller than the outer diameter of the rod suspended in the axial direction of the rod, and a male screw a ₂ on the outer periphery of the protruding 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 A step b ₂ projecting toward the center of the cylinder is provided in the middle of the tube, and the upper part of the step is inclined so as to increase in diameter upward, thereby forming an enlarged inclined surface b _21. 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 above-mentioned stopper c is provided with a vertically short ring-shaped working body c ₁ having an inner diameter that can be inserted into the intermediate cylindrical body b, and is attached downwardly from the working body. 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 a structure consisting of d ₇ and Se' be annularly arranged wedge c ₃ Prefecture,
D: The above-described axial force torque transmission shaft d is a male screw d that engages with the female screw a ₄ of the recess a _{3 on} the upper end surface of the short rod a disposed below and abuts against the bottom surface δ of the recess. 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 A cylindrical base portion d _{3 having} an outer diameter Φ _{5 that} can be inserted into the polygon portion b ₃ of the intermediate cylinder b and can pass through the enlarged diameter inclined surface b ₂₁ of the step portion b ₂ projecting from the inner surface of the intermediate cylinder b. Further, an insertion shaft portion d ₄ that can be partially inserted inside the ring-shaped operating body c ₁ of the retainer c is provided on the same base portion, and the insertion shaft portion has an outer diameter Φ _{1 at the} upper end. Furthermore 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 downwardly from follow the lower Which has a reduced diameter portion d ₇ reduced in diameter Te, and an outer diameter [Phi ₃ of the maximum diameter portion d the outer diameter [Phi ₃ is the base d ₃ of small and maximum diameter d ₆ than the outer diameter [Phi ₅ of ₆ intermediate a structure capable of passing a wedge c ₃ of the [Phi ₈ - [Phi] ₃ of the omission on the gap stopper c spacing between cylinder inner diameter [Phi ₈ of the cylindrical body b,
E: wherein the missing stop locking means e is a means for separating a short rod which is connected, omission reduced diameter portion d ₇ facing the wedge member c ₃ fasteners c the axial force torque transmitting shaft d the position in the middle cylinder b and missing in the locked state stop c in operation from outside of the operating member c ₁ intermediate cylindrical body b which together with the intermediate tubular member b can to move integrally, moreover intermediate cylinder It is a means capable of releasing the locking state by an outer operation of the body b and making the short rod separable,
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 and has at its upper end face of the insertion shaft portion d ₄ beta position abuts against the lower end surface α of the protrusion shaft a ₁ of the upper short rod a, simultaneously axial force the lower end surface γ of the male thread d ₁ of the torque transmission shaft d below contact with the internal thread a ₄ of the recess a ₃ rods a person, and a polygon portion b ₃ of the intermediate cylinder member b is not set vertical dimensions as engaged with polygonal portion d _2,
H: exits the stopper c in a state in which the upper opening b ₄ and interiors engages the wedge c ₃ is inserted inside the stepped portion b ₂ of the intermediate cylinder member b of the intermediate cylinder member b, the intermediate tubular member screwed b internal threads b ₁ of the inner surface upper part of the male screw a ₂ below the short rod a, threaded male screw d ₁ of the axial force torque transmission shaft d to the internal thread a ₄ of the recess a ₃ at the upper end of the short rod a Combined state, In the case where the retaining member e is provided with a screw hole e ₁ in the side wall of the intermediate cylinder b and a short screw e ₂ is screwed into the screw hole, the rod is removed in the intermediate cylinder b. 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 axial bottom surface α that makes contact with the end surface β is symmetrical about the axial line and within a predetermined radius from the axial center line is a concave spherical surface or convex spherical surface, and the other upper end surface β that makes contact with this Is shaped so as to be a convex spherical surface or a concave spherical surface, and the shaft bottom surface α and the upper end surface β are fitted to each other with 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 movement of Rotation axial force torque transmitting shaft d is an outer diameter between the upper and lower the polygonal portion d ₂ and male thread d ₁ has the same outer diameter as the rod outer diameter, to form a pivoting operating wrench placement portion in the middle it is a structure in which the operating connection portion d _8, unit according to any one of claims 5-7. 5. The O-ring is interposed between the lower end surface α of the projecting shaft a ₁ of the short rod ₁ and the stopper c and between the lower short rod a and the lower end of the intermediate cylinder b. The long rod connection structure described. The O-ring is interposed between the lower end surface α of the projecting shaft a ₁ of the short rod and the stopper c, and between the lower short rod a and the lower end of the intermediate cylindrical body b. The stated unit.

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