JP2001311144A - Columnar body and columnar body joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a columnar body and columnar body joint capable of eliminating dislocation of mutually confronting grooves caused by manufacturing errors or intrusion of foreign materials and engagedly locking the a cylindrical part and an shaft part by inserting a key member into the opposite grooves. SOLUTION: A cylinder inner peripheral face 23 and an a shaft outer peripheral face 13 forming a plane parallel to the axial center of a columnar body respectively are dividediy arranged in the cylinder part 21 and the shaft part 11, a cylinder inside opposite end face 21A and a shaft inside opposite end face 11A mutually confronting the columnar body axial direction at the axial inside, and a cylinder outside opposite end face 21B and a shaft outside opposite end face 11B mutually confronting the columnar body axial direction at the axial outside are dividediy arranged in the columnar body. A gap S is formed between the cylinder inside opposite end face 21A and the shaft inside opposite end face 11A, and between the cylinder outside opposite end face 21B and the shaft outside opposite end face 11B respectively, in the connected state that the key member 3 is arranged astride over the inward groove 22 and the outward groove 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a landslide prevention pile,
Support pillars, pillars and columnar joints used for pillars of the structure, etc., in detail, the inward groove portion and the outward groove portion which are freely fit to each other and radially opposed to each other in the fitted state are formed in the circumferential direction. A cylindrical member and a shaft are respectively formed along the inward groove and the outward groove, and the cylindrical member and the shaft are engaged with each other in a locking state by disposing the key member over both the inward groove and the outward groove. An inner peripheral surface portion and an outer peripheral surface portion of the cylindrical portion that form a surface parallel to the core are distributed and arranged, and the inner end surface of the cylindrical portion and the inner axial portion of the cylindrical portion that face each other in the radial direction inside in the axial direction. Opposite end surface, and a cylindrical portion outer opposing end surface and a shaft portion outer opposing end surface opposing each other in the axial direction of the columnar body on the outside in the radial direction,
The present invention relates to a columnar body which is provided separately and has at least one of the cylindrical portion and the shaft portion provided at an end portion, and a columnar joint used for the columnar body.

[0002]

2. Description of the Related Art Conventionally, as a columnar body and a columnar joint of this type, when a cylindrical portion and a shaft portion are fitted and connected to each other, the cylindrical portion inside facing end surface, the shaft portion inside facing end surface, and When the cylindrical portion outer facing end surface and the shaft portion outer facing end surface are in contact with each other, the key member is fitted so as to straddle the inward groove portion and the outward groove portion, and the cylindrical portion and the shaft portion Is configured to be engaged and connected in a retaining state.

[0003]

According to the conventional columnar body and the columnar joint described above, for example, as shown in FIG. 6A, the key member 3 is fitted into the inward groove 22. The cylindrical portion inner facing end surface 21A, the shaft portion inner facing end surface 11A, and the tubular portion outer facing end surface 21B
The outer groove 12 and the inward groove 22 are located at positions where the outer groove 12 and the inward groove 22 face each other when the shaft portion and the outer outer end surface 11B come into contact with each other, so that the key member 3 can be fitted into the two grooves. As shown in FIG. 6B, a position error occurs between the opposing positions of the two grooves due to a manufacturing error, or between the inner end surface 21A and the inner end surface 11A, or the outer end surface of the cylindrical portion. 21B and shaft portion outer facing end surface 11
For example, when a foreign object such as sand enters the gap between the groove B and the position where the two groove portions face each other, the key member 3 cannot be fitted into the opposed groove portion. It becomes impossible to engage and connect the part 11 with the retaining state. Therefore, in anticipation of a positional deviation between the opposing positions of the two grooves due to a manufacturing error or foreign matter entering, the opening length H of the two grooves is set to the length h of the key member 3 in the column axis X direction. (See FIG. 7A), the key member 3 can be fitted into the opposing grooves even if the opposing positions of the two grooves are misaligned. (Fig. 7
(B)), since the opening length H of the two groove portions is formed to be longer than the length h of the key member 3,
When the key member 3 hits the inner wall of the groove by impact, the key member 3 may be deformed (see FIG. 7C). When the facing position of the outward groove 12 facing the key member 3 is shifted upward, the key member 3 comes into contact with the shaft outer peripheral surface portion 13 below the outward groove entrance 12a and the outward groove portion is formed. 12 may not be able to be fitted (see FIG. 7D).

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems, to prevent rattling between the key member and the groove portion to prevent deformation of the key member, and to reduce manufacturing errors and foreign matter. Provided are a columnar body and a columnar joint which can eliminate a positional deviation between the opposing groove portions, fit the key member into the opposing groove portions, and engage and connect the cylindrical portion and the shaft portion in a retaining state. Where you do it.

[0005]

[Structure] As shown in FIGS. 1 to 3, the characteristic structure of the first aspect of the present invention is to fit an inward groove 22 which can be freely fitted to each other and radially opposes in a fitted state. The outward groove portions 12 are separately formed along the circumferential direction, and the key member 3 is disposed over both the inward groove portion 22 and the outward groove portion 12 so that the key member 3 is engaged in a retaining state. A cylindrical portion inner peripheral surface portion 23 and a shaft portion outer peripheral surface portion 13 that form a surface parallel to the columnar body axis on the fitted cylindrical portion 21 and the shaft portion 11, respectively.
And a cylindrical portion inner facing end surface 21A and a shaft portion inner facing end surface 11A opposed to each other in the radial direction on the inner side in the radial direction, and the columnar body cores on the outer side in the radial direction. A cylindrical portion outer facing end surface 21B and a shaft portion outer facing end surface 11B which face each other in a direction are arranged separately, and at least one of the tubular portion 21 and the shaft portion 11 is a columnar body provided at an end portion. When the cylindrical portion 21 and the shaft portion 11 are fitted to each other, and the key member 3 is joined to the inward groove portion 22 and the outward groove portion 12, the cylindrical member 21 and the axially opposed end surface 21 </ b> A A gap S is formed between the shaft portion inner facing end surface 11A and between the cylindrical portion outer facing end surface 21B and the shaft portion outer facing end surface 11B.

As shown in FIGS. 1 to 3, the characteristic feature of the second aspect of the present invention is that an inward groove 22 and an outward groove 12 which can be freely fitted to each other and radially oppose each other in the fitted state are formed in the circumferential direction. Are formed separately, and the inward groove portions 22 are formed.
The cylindrical member 21 and the shaft portion 1 that engage with each other in a locking state by disposing the key member 3 over both the
1, a cylindrical portion inner peripheral surface portion 23 and a shaft portion outer peripheral surface portion 13 which form a surface parallel to the columnar body axis are respectively arranged on the cylindrical portion 21 and the shaft portion 11 and distributed. A cylindrical portion inside facing end surface 21A and a shaft portion inside facing end surface 11A opposed to each other in the column axis direction inside the direction, and a tubular portion outside facing end surface 21B opposed to the column body axis direction mutually outside in the radial direction. A columnar joint for disposing the shaft portion outer facing end surface 11B separately and attaching the shaft portion to the end of the columnar member, wherein the cylindrical portion 21 and the shaft portion 11 are fitted to each other to form the key. When the member 3 is joined to the inward groove portion 22 and the outward groove portion 12, the member 3 is in contact with the cylindrical portion inside facing end surface 21 A and the shaft portion inside facing end surface 11 A, and with the tubular portion outside facing end surface 21 B. A gap S is formed between the shaft portion and the outer end surface 11B. In the place that is configured to be.

[0007] As described above, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the accompanying drawings.

[Operation and Effect] According to the first aspect of the present invention,
In the joint state where the cylindrical portion and the shaft portion are fitted and the key member straddles the inward groove portion and the outward groove portion,
Between the cylindrical portion inside facing end surface and the shaft portion inside facing end surface,
And, since it is configured such that a gap is formed between the cylindrical portion outer facing end surface and the shaft portion outer facing end surface, rattling between the key member and the groove portion can be suppressed, Even if a position error occurs between the opposing positions of the two groove portions due to a manufacturing error or foreign matter, the key member can be fitted into the opposing groove portions. So, for example,
When fitting and connecting the tubular portion and the shaft portion, between the shaft portion inside facing end surface and the tubular portion inside facing end surface, and between the tubular portion outside facing end surface and the shaft portion outside facing end surface. Since a gap is formed in each case, the cylinder portion and the shaft portion can be moved relative to each other in the axial direction of the columnar body by the amount of the gap. Or
The foreign material such as sand enters between the cylindrical inner side facing end surface 21A and the axial inner side facing end surface 11A, or between the cylindrical outer side facing end surface 21B and the axial outer side facing end surface 11B. Even in the case of deviation, etc., the key member can be fitted into the opposed groove portion by moving the inward groove portion and the outward groove portion relatively to each other so as to come to a position facing each other. The opening length of both groove portions may be formed to be longer than the length of the key member by the tolerance. As a result, the dimensional tolerance between the key member and the groove can be reduced to prevent rattling, so that the key member can be prevented from being impacted against the inner wall of the groove and deformed. Can be moved relative to each other by the gap, so that if the positional deviation of the opposing positions of the two groove portions is within the range of the gap, the key member can be securely fitted into the opposing groove portions, and It has become possible to provide a columnar body capable of improving the workability of the connection work for engaging and connecting the portion and the shaft portion in the retaining state.

According to the second aspect of the present invention, the cylindrical portion and the shaft portion are fitted, the cylindrical portion and the shaft portion are fitted, and the key member is connected to the inward groove and the outward direction. In the joining state spanning the groove, gaps are formed between the cylindrical portion inside facing end surface and the shaft portion inside facing end surface, and between the tubular portion outside facing end surface and the shaft portion outside facing end surface, respectively. With such a configuration, it is possible to suppress rattling between the key member and the groove portion, and even if a misalignment occurs between the two groove portions due to a manufacturing error or foreign matter, the key member is not moved. It can fit into the opposing groove. That is, for example, when the cylindrical portion and the shaft portion are fitted and connected to each other, between the shaft portion inside facing end surface and the cylindrical portion inside facing end surface, and between the tubular portion outside facing end surface and the shaft portion outside facing end surface. Since the gap is formed in each of the gaps, the cylinder portion and the shaft portion can be relatively moved in the axial direction of the columnar body by the gap, so that the facing positions of the two groove portions are located due to a manufacturing error. When the gaps occur, or when foreign matter such as sand enters between the inner end surface of the cylinder and the inner end surface of the shaft, or between the outer end surface of the cylinder and the outer end surface of the shaft, the two grooves face each other. Even when the position is misaligned, the key member can be fitted into the opposed groove by relatively moving the inward groove and the outward groove until the inward groove and the outward groove come to a position facing each other. The length of the key member in the axial direction Mouth length, may be one which is formed longer by the tolerance amount. As a result, it is possible to reduce the dimensional tolerance between the key member and the groove, thereby suppressing backlash.
It is possible to prevent the key member from hitting against the inner wall of the groove due to impact and to be deformed, and to move the opposing position of both grooves relative to each other by the amount of the gap. When the key member is within the range of the gap, the key member can be securely fitted into the opposing groove portion, and the workability of the connection operation for engaging and connecting the cylinder portion and the shaft portion in a retaining state can be improved. It has become possible to provide a columnar joint.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A landslide prevention pile which is an example of a columnar body according to an embodiment of the present invention will be described below with reference to the drawings. In the drawings, portions denoted by the same reference numerals as those of the conventional example indicate the same or corresponding portions. FIG. 1 shows that a cylindrical cylindrical portion 21 is provided at one pile end and a small-diameter cylindrical shaft 11 is provided at the other pile end, and the cylindrical portion of a pile A adjacent in the pile axis X direction. 21 shows a landslide-preventing stake A in which the shaft 21 and the shaft portion 11 are configured to be freely connectable to each other in a retaining state, and the stake A is suspended by a crane or the like.
While connecting the required number of piles A, they are inserted into a vertical hole excavated in the ground in advance, and the hollow portion E and the outer peripheral portion of the columnar body are filled with a filler such as concrete so that the ground can be reinforced.

As shown in FIG. 1, a pile A of the present invention has a cylindrical joint 4 having a cylindrical portion 21 welded to one end of a cylindrical cast steel pipe 1 cast by centrifugal casting. At the same time, the other end of the cast steel pipe 1 is provided with a shaft joint 5 having a shaft 11.
Are welded and formed into a cylindrical shape having a substantially constant outer diameter over the entire length, and the tubular joint portion 4 is configured to be buried underground with the upper side facing upward. The key member 3, which is provided with an annular outward groove portion 12 on the outer peripheral surface and an annular inward groove portion 22 on the inner peripheral surface of the cylindrical portion 21 and is attached to the outward groove portion 12 so as to be able to advance and retreat, is attached to the cylindrical portion 21. As the fitting operation with the shaft portion 11 is performed, the fitting is performed so as to extend over the inward groove portion 22 and the outward groove portion 12, and the tubular portion 22 and the shaft portion 11 of the adjacent pile A fitted with each other are prevented from falling off. It is configured to be freely connectable.

The relative positions of the inward groove portion 22 and the outward groove portion 12 are between the inside facing end surface 21A of the cylindrical portion and the inside facing end surface 11A of the shaft portion, and between the outside facing end surface 21B of the tubular portion and the outside facing end surface 11B of the shaft portion. With the gaps S formed between them, the inward groove portion 22 and the outward groove portion 12 are located at positions facing each other, and the key member 3 is fitted and engaged in a state of straddling both the groove portions. It is composed.

Further, the steel constituting the tubular joint portion 4 and the shaft joint portion 5 are all configured to have higher strength than the steel forming the cast steel pipe 1.

The "width" of the key member 3 referred to in the present invention is the radial length when the key member 3 is cut in the radial direction, and the "length" h is the key length. It indicates the length of the member 3 in the pile axis X direction. The "length" H of the groove opening is the opening distance of the entrances 12a, 22a in the pile axis X direction, and the "depth" of each groove 12, 22 is the radial direction with respect to each pile A. To the retirement distance.

An example of the embodiment will be described below according to the procedure shown in FIGS. In advance, as shown in FIG.
An annular outward groove 12 is provided in the shaft outer peripheral portion 13 of the shaft 11 provided in the shaft joint 5 of the pile A, and the cylindrical portion 21 provided in the tube joint 4 of the other pile A is provided. An annular inward groove portion 22 is provided in the inner peripheral surface portion 23 of the cylindrical portion, and the inner diameter is smaller than the diameter of the entrance 12a of the outward groove portion 12 in the natural state, and the outer diameter is larger than the diameter of the entrance 22a of the inward groove portion 22 in the natural state. , C-ring shaped elastic ring key 3 made of spring material
1 (an example of the key member 3) is fitted into the inward groove 22 and attached. The opening length H of the inward groove portion 22 and the outward groove portion 12 is formed to be longer than the sum of the length h of the key member in the pile axis X direction and its tolerance. still,
As shown in FIG. 4, the depth of the inward groove 22 is formed larger than the width of the elastic ring key 31, and the depth of the outward groove 12 is smaller than the width of the elastic ring key 31. In advance.

Next, as shown in FIGS. 2B and 2C,
Along with the fitting operation of the piles A, the tapered corner portion 31a formed on the shaft portion 11 side of the elastic ring key 31 attached in the inward groove portion 22 of the cylindrical portion 21, and the shaft portion inner facing end surface 11A.
The elastic ring key 31 is guided to expand in diameter by being in contact with the tapered corner portion 11a formed in the inner groove portion 22 and is pushed into the inward groove portion 22, and as shown in FIGS.
The elastic ring key 31 is fitted in a reduced diameter so as to straddle the inward groove portion 22 and the outward groove portion 12 when it comes to the opposing position, and the cylindrical portion 21 and the shaft portion 11 are engaged and connected to each other. Become. At this time, between the shaft portion inner facing end surface 11A and the tubular portion inner facing end surface 21A, and the tubular portion outer facing end surface 2
Since the gap S is formed beforehand between each of the shaft 1B and the shaft-side outer facing end surface 11B, as shown in FIG. If the error is within the gap S even if the opposing positions of the groove 12 and the outward groove 12 are shifted, the inward groove 22 and the outward groove 12 further face as shown in FIG. The elastic ring key 31 can be fitted into the opposing grooves by relatively moving the opposing positions of the two grooves until the position is reached. Incidentally, the gap S is 1.0 mm or more.

[Other Embodiments] Other embodiments will be described below. <1> The numbers of the inward groove portions and the outward groove portions are not limited to one step described in the above embodiment, and a plurality of steps may be provided, and the numbers are arbitrary. <2> The number of key members is not limited to one described in the above embodiment, and a plurality of key members may be provided, and the number is arbitrary. For example, as shown in FIG.
A plurality of elastic ring keys 31 (two in the present embodiment) are mounted in the inward groove portions 22, and a plurality of elastic ring keys mounted in the inward groove portions 22 of the cylindrical portion 21 with the fitting operation of the piles A. A configuration in which the cylinder 31 and the shaft 11 are engaged with each other so as to straddle the predetermined outward groove 12 facing the cylinder 21 and the shaft 11 may be adopted. At this time, the inward groove 2
When the thickness of the plurality of elastic ring keys 31 attached to the base 2 in the direction of the axis X of the pile axis is made smaller on the base end side than on the tip end side of the cylindrical portion, other than the predetermined opposing outwardly facing groove 12. Since the elastic ring key 31 can be prevented from being fitted into the shaft portion 11, the fitting operation between the cylindrical portion 21 and the shaft portion 11 can be performed smoothly. (When a plurality of elastic ring keys are attached to the shaft portion 11, the elastic ring keys are formed such that the thickness thereof is smaller at the base end side than at the tip side of the shaft portion.) <3> The shape of the key member is first The present invention is not limited to the C-shaped elastic ring key described in the embodiment, and may be an annular body divided into a plurality in the circumferential direction. For example, an elastic force is applied to the split key member by a leaf spring or the like, and the split key member is fitted in a state of straddling both the groove portions with the fitting operation, and the cylindrical portion and the shaft portion are engaged and connected in a state where they cannot be removed. The configuration may be as follows. <4> The operation of changing the diameter of the key member is not limited to the operation performed along with the operation of fitting the cylindrical portion and the shaft portion described in the above embodiment. For example, the key member may be operated by a diameter changing operation means such as a bolt. May be changed so that the key member is fitted in a state of straddling the inward groove portion and the outward groove portion, and the cylindrical portion and the shaft portion are connected in a retaining state. <5> The mounting location of the key member is not limited to the configuration in which the key member is fitted into the inward groove described in the above embodiment, and the key member is mounted in the outward groove. It may be something. <6> The columnar body described in the above embodiment is not limited to the above configuration, and may be formed of a steel pipe or a composite pipe of concrete and steel pipe or the like instead of the cast steel pipe. <7> The tubular joint and the shaft joint described in the above embodiment are not limited to the above configuration, and may be forged instead of cast steel, or may be formed by welding a joint formed separately. The invention is not limited to this, and may be formed integrally with the columnar body. <8> In addition to the landslide prevention pile, the columnar body of the present invention can be used for a support pile, a pillar of a structural body, and the like. <9> The columnar body is not limited to the configuration in which the cylindrical part is provided at one end of the columnar body described in the previous embodiment and the shaft part is provided at the other end, and the cylindrical part is provided at both ends of the columnar body. May be used to form a cylindrical columnar body provided with a shaft, or a shaft columnar body provided with shaft portions at both ends of the columnar body. According to this, when connecting the pillars by hanging them with a crane or the like, the fitting connection can be made without worrying about the mutual orientation by merely suspending the cylindrical pillars and the shaft pillars alternately. can do. Further, the configuration may be such that one of the cylindrical portion and the shaft portion is provided only at one end of the columnar body. In this configuration, a columnar body provided with only one cylindrical portion and a columnar body provided with only one shaft portion are used in a pair, and in a columnar body connection connecting only two columnar bodies, an unnecessary joint portion is used. The cost can be reduced because the need to provide the device is eliminated.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional side view of a pile according to an embodiment of the present invention.

FIG. 2 is an enlarged longitudinal sectional view of a main part for explaining a connection operation of a pile according to an embodiment of the present invention.

FIG. 3 is an enlarged longitudinal sectional view of a main part for explaining a connection operation of a pile according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view of a key member for explaining a connection operation of a pile according to an embodiment of the present invention.

FIG. 5 is an enlarged longitudinal sectional view of a main part showing another embodiment.

FIG. 6 is an enlarged sectional view of an essential part for explaining a connection operation of a pile showing a conventional example.

FIG. 7 is an enlarged cross-sectional view of a main part illustrating a connection operation of a pile showing a comparative example.

[Explanation of symbols]

 3 Key Member 11 Shaft 11A Shaft Inside Opposing End 11B Shaft Outside Opposing End 12 Outward Groove 13 Shaft Outer Surface 21 Tubular 21B Tubular Outer Facing End 21A Tubular Inside Opposing End 22 Inward Groove 23 Inner Groove 23 Surface part X Column core S Clearance A Pile

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Masanori Katayama 2-47, Shishitsuhigashi, 1-chome, Namiwa-ku, Osaka-shi, Osaka F-term (reference) 2D041 AA02 DB02 DB05 DB12 DB13 2E125 AA04 AB17 AG57 EA12

Claims (2)

[Claims] An inward groove portion and an outward groove portion which are freely fitted to each other and are radially opposed to each other in a fitted state are separately formed along a circumferential direction, and the inward groove portion and the outward groove portion are outwardly facing each other. An inner peripheral surface portion and an outer peripheral surface portion of the cylindrical portion which form a surface parallel to the columnar body axis, respectively, on the cylindrical portion and the shaft portion which are engaged with the key member so as to be prevented from falling out by arranging the key member over both of the groove portions. Along with distributing and distributing, the cylindrical part inside facing end face and the shaft part inside facing end face facing each other in the axial direction of the column inside the radial direction, and the axial direction facing each other outside the radial direction. The opposed cylindrical portion outer facing end surface and the shaft portion outer facing end surface are arranged separately, and at least one of the tubular portion and the shaft portion is provided.
A columnar body provided at an end portion, wherein the cylindrical portion and the shaft portion are fitted to each other, and the key member is connected to the inward groove portion and the outward groove portion in a joined state. A columnar body configured to have gaps formed between an opposing end surface and the shaft portion inner opposing end surface and between the cylindrical portion outer opposing end surface and the shaft portion outer opposing end surface. 2. An inward groove portion and an outward groove portion which are freely fitted to each other and are radially opposed to each other in a fitted state are separately formed along a circumferential direction. By disposing the key member over both of the groove portions, a cylinder portion and a shaft portion which engage in a retaining state by providing a key member are provided, and the cylinder portion and the shaft portion form surfaces parallel to the columnar body axis, respectively. While distributing and disposing the cylindrical inner peripheral surface and the shaft outer peripheral
A cylindrical portion inside facing end surface and a shaft portion inside facing end surface facing each other in the radial direction inside the pillar body axis direction, and a tubular portion outside facing end surface and a shaft portion facing each other outside the radial direction in the pillar body axial direction. An outer facing end face, a columnar joint for sifting and attaching to an end of the columnar body, wherein the cylindrical portion and the shaft portion are fitted together, and the key member faces the inward direction. In the joined state straddling the groove and the outward groove, between the cylindrical portion inside facing end surface and the shaft portion inside facing end surface, and between the tubular portion outside facing end surface and the shaft portion outside facing end surface, respectively. , A columnar joint configured to form a gap.