JP4733361B2 - Engagement status confirmation method - Google Patents

Description

The present invention provides a cylindrical portion at one columnar body end portion forming a steel pipe support pile and a shaft portion at the other columnar body end portion, and the columnar bodies adjacent to each other in the columnar axis direction. The tube portion and the shaft portion are configured to be freely fitted to each other so that the shaft portion enters the tube portion, and in the fitted state between the tube portion and the shaft portion, the tube portion and the shaft portion by fall into place in the radial direction, the columnar body is provided with engaging means for engaging the unremovable state and said shaft portion and the tubular portion, and the tubular portion by the engagement means and the shaft portion The present invention relates to an engagement state confirmation method for confirming the engagement state.

Such columnar bodies are used, for example, for support piles and landslide suppression piles, etc. Normally, a columnar body of a fixed-size object is brought into the field, and the lower columnar body in the process of being buried in the ground is used. The upper columnar body is suspended by a crane or the like, and the construction is proceeded while connecting the lower end of the upper columnar body to the upper end of the lower columnar body. Finally, the columnar body of a predetermined length is brought into the ground. It is to be buried and constructed.
By the way, conventionally, the connection of the upper and lower columnar bodies has been frequently used by welding, but since it is on-site welding, it requires a lot of time for welding work and also requires skilled welding techniques. In addition, there were various problems such as the quality of the welded part being affected by the weather.
Therefore, in recent years, as described above, a cylindrical portion is provided at the end of one columnar body, a shaft portion is provided at the end of the other columnar body, the shaft portion is fitted into the cylindrical portion, and the cylinder is provided. By inserting the key member across the inward groove portion formed along the circumferential direction on the inner peripheral surface of the portion and the outward groove portion formed along the circumferential direction on the outer peripheral surface of the shaft portion, the cylindrical portion and the shaft portion Has been proposed (see, for example, Patent Document 1).

JP 11-36285 A

By the way, in the above-described prior art, the shaft portion of the other columnar body is fitted into the cylindrical portion of one columnar body, and then straddles the inward groove portion of the inner peripheral surface of the cylinder portion and the outward groove portion of the outer peripheral surface of the shaft portion. Since the key member is fitted, it has not been possible to confirm whether or not the key member is securely fitted over both groove portions.
Therefore, even if the key member does not surely straddle both groove portions, there is a possibility that the connection of both columnar bodies may be processed, and in that case, the connection force in the retaining state in both columnar bodies. There is a problem that the strength required for the entire columnar body itself decreases.
The present invention has focused on these conventional problems, and an object thereof is to provide a engaged state confirmation method that can easily determine engagement between the cylindrical portion and the shaft portion.

In the first characteristic configuration of the present invention, a cylindrical portion is provided at one columnar body end portion forming a steel pipe support pile, and a shaft portion is provided at the other columnar body end portion, and adjacent to each other in the columnar axis direction. The cylindrical portion and the shaft portion of the matching columnar body are configured to be fitted to each other so that the shaft portion enters the cylindrical portion, and in the fitted state between the cylindrical portion and the shaft portion, by fall into place in the radial direction of the shaft portion, the columnar body is provided with engaging means for engaging a state retaining the said tubular portion and the shaft portion, the cylindrical portion by said engagement means A method for confirming the engagement state between the shaft portion and the shaft portion, wherein a bolt hole into which a set bolt for moving the engagement means to fit in the predetermined position is screwed is formed on the outer peripheral surface of the cylinder portion. The bolt is formed so as to open and the engagement means is in the predetermined position. A gauge having a gauge shaft portion set to the length corresponding to the depth from the outer peripheral surface of the cylinder portion of the set bolt screwed to the operation portion main body is used, and the gauge shaft portion is used as the set bolt. Based on whether or not the operating portion main body is in contact with the outer peripheral surface of the cylindrical portion when inserted into the bolt hole until contact, the engagement between the cylindrical portion and the shaft portion by the engaging means The point is to check the state .

[Action and effect]
The engagement state between the cylindrical portion and the shaft portion can be easily determined.

Embodiments of a columnar body according to the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 4, this columnar body includes an upper support pile A1 made of steel pipe, which is an example of an upper columnar body, and a lower support pile A2 made of steel pipe, which is an example of a lower columnar body. At the lower end of the pile A1, a cylindrical portion 1 made of cast steel is connected by welding 2 with its axis L1 coaxial with the axis X1 of the upper support pile A1, and the upper support pile A1 and the cylinder portion 1 One columnar body is configured.
On the other hand, a hollow shaft portion 3 made of cast steel is connected to the upper end of the lower support pile A2 by welding 4 with its axis L2 coaxial with the axis X2 of the lower support pile A2, and the lower support pile A2 And the shaft portion 3 constitute the other columnar body.

The outer diameter of the cylindrical portion 1 is configured to be the same as the outer diameter of the upper and lower support piles A1 and A2, and the upper portion of the inner diameter bulges in an annular shape toward the inner side, An annular engagement recess 5 is provided in the bulging portion, and the inner diameter thereof is configured to be the same as the inner diameters of the upper and lower support piles A1 and A2 below the bulging portion. The ring-shaped inward groove portion 6 that opens toward the inner side is provided with two strips up and down along the circumferential direction.
The tube portion 1 is provided with a plurality of bolt holes 7 that open to the outer peripheral surface of the tube portion 1 and communicate with each inward groove portion 6 along the two inwardly extending groove portions 6. A large-diameter threaded portion 8 a of the set bolt 8 is configured to be screwable into the hole 7, and an annular engagement step portion 9 is provided on the outer peripheral portion of the lower end surface 1 a of the cylindrical portion 1. .

The shaft portion 3 is configured so that its outer diameter is slightly smaller than the inner diameter of the cylindrical portion 1 so that it can be fitted into the cylindrical portion 1 of the upper support pile A1, and the tip portion of the cylindrical portion 1 An annular engaging convex portion 10 that engages with the engaging concave portion 5 is provided, and the base end side of the shaft portion 3, that is, the lower side from the shaft step portion surface 3a facing the cylindrical lower end surface 1a The diameter is the same as the outer diameter of the upper and lower support piles A1 and A2.
The outer circumferential surface of the shaft portion 3 is provided with two annular outward grooves 11 that open outward in the circumferential direction, and the outer circumferential portion of the shaft step surface 3a has an annular engagement. Protrusions 12 are provided, and the shaft portion 3 is fitted into the cylindrical portion 1 of the upper support pile A1, the engaging convex portion 10 is engaged with the engaging concave portion 5, and the engaging protrusion 12 is engaged with the engaging step portion 9. In the engaged state, the inward groove portion 6 on the cylinder portion 1 side and the outward groove portion 11 on the shaft portion 3 side are positioned to face each other, and the key member (engaging means) is straddled between the groove portions 6 and 11. 13) can be fitted.

As shown in FIGS. 2 and 3, the key member 13 is divided into a plurality of pieces in the longitudinal direction of both the groove portions 6 and 11, and in this embodiment, the number of the key members 13 is six. The number of the bolt holes 7 is determined so as to correspond to each other, the plurality of bolt holes 7 are arranged at equal intervals around the cylindrical portion 1, and set at the center in the longitudinal direction of each divided key member 13 a. A bolt hole 14 into which the small-diameter threaded portion 8b of the bolt 8 is screwed is provided.
The large-diameter screw portion 8a and the small-diameter screw portion 8b of the set bolt 8 are constituted by screws in opposite directions to each other. Therefore, the bolt holes 7 provided in the cylindrical portion 1 and the bolts provided in each divided key member 13a The hole 14 is also composed of screws in opposite directions.

Further, the cylindrical portion 1 has peep holes (communication holes) 15 that open to the outer peripheral surface of the cylindrical portion 1 along the two upper and lower inward groove portions 6 and communicate with each inward groove portion 6. In this embodiment, a total of twelve pairs are provided on the left and right with the bolt hole 7 as the center, and each of the peeping holes 15 is inserted into the inward groove portion 6 in the state where each of the peeping holes 15 is fitted into each of the divided key members 13a. It is located near the both ends of the longitudinal direction, and it is comprised so that the vicinity of the edge part of each division | segmentation key member 13a can be visually recognized from the outer side of the cylinder part 1.
An internal thread 15 a is provided on the inner peripheral surface of each peep hole 15, and an auxiliary set bolt 16 can be screwed into each peep hole 15.

In order to connect the columnar bodies having such a configuration to each other, as shown in FIG. 4 (a), the lower support pile A2 in a state in which each divided key member 13a is retracted into the inward groove portion 6 of the cylindrical portion 1. The cylindrical portion 1 of the upper support pile A1 is externally fitted to the shaft portion 3. When the engaging recess 5 and the engaging step 9 on the cylinder portion 1 side are engaged with the engaging protrusion 10 and the engaging protrusion 12 on the shaft portion 3 side, The facing groove portion 6 and the two outwardly facing groove portions 11 on the shaft portion 3 side are positioned to face each other.
In this state, each set bolt 8 is operated from the outside of the tube portion 1 and is rotated in a direction in which the large-diameter screw portion 8 a is screwed into the bolt hole 7 of the tube portion 1. Then, the large-diameter screw portion 8a is screwed into the bolt hole 7 of the cylindrical portion 1, and at the same time, the split key member 13a is moved away from the small-diameter screw portion 8b. As shown in (b), it is fitted over the inward groove portion 6 of the cylindrical portion 1 and the outward groove portion 11 of the shaft portion 3, and both support piles A1, A2 are connected in a retaining state.

At that time, for some reason, as shown in FIG. 3A, the split key member 13a is slanted, and one end side of the split key member 13a is completely fitted across the groove portions 6 and 11. Nevertheless, the other side may not be completely fitted across the groove portions 6 and 11.
In that case, since the situation near both ends of each split key member 13a can be visually observed from each peep hole 15, if there is such a split key member 13a, as shown in FIG. By screwing the auxiliary set bolt 16 into the hole 15 and pressing near the end of the split key member 13a, the split key member 13a can be completely fitted across both the groove portions 6 and 11.

[Another embodiment]
(1) Next, another embodiment shown in FIG. 5 and FIG. 6 will be described. In order to avoid duplication, the same parts as those in the previous embodiment and parts having the same action are denoted by the same reference numerals. Description is omitted, and only the configuration different from the previous embodiment will be mainly described.

In the previous embodiment, the key member 13 is fitted over the inward groove portion 6 on the cylindrical portion 1 side and the outward groove portion 11 on the shaft portion 3 side, and both support piles A1 and A2 are configured to be connectable in a retaining state. In another embodiment shown in FIG. 5 and FIG. 6, both support piles A <b> 1 and A <b> 2 are configured to be connected not only in a retaining state but also in a relatively non-rotatable state. .
Therefore, a plurality of rectangular tube-side cutouts 17 are provided in the circumferential direction at the lower end of the tube portion 1, and a rectangular shaft-side cutout 18 is also formed at the step portion of the shaft portion 3. A plurality of rotation-preventing key members 19 that are provided in correspondence with the notches 17 and that can be fitted between the notches 17 and 18 can be fixed to the shaft portion 3 by bolts 20.

According to this other embodiment, the key member 13 prevents the support piles A1 and A2 from coming off, and the rotation prevention key member 19 also prevents the relative rotation of the support piles A1 and A2. Therefore, it becomes possible to transmit the rotational force of upper support pile A1 to lower support pile A2.
Therefore, in the previous embodiment, when embedding both support piles A1 and A2 in the ground, the support piles A1 and A2 are struck and buried, so-called driving method, or landslide suppression dropped into a vertical hole formed in the ground It is limited to a pile or a pillar of a structure used for erection, but in this other embodiment, as well as a driving method, etc., both support piles A1 and A2 are buried while rotating, so-called medium It can also be applied to the excavation method, the soil cement synthesis method, or the rotary buried pile method.

(2) In the embodiments described so far, the example in which the cylindrical portion 1 is configured by connecting the cylindrical portion 1 to the lower end of the upper support pile A1 is shown. However, the cylindrical portion 1 is integrated with the lower end of the upper support pile A1. It is also possible to configure one columnar body, and similarly, the other columnar body can be configured by integrally providing the shaft portion 3 at the upper end of the lower support pile A2.

(3) In the above embodiments, the example in which the female screw 15a is provided on the inner peripheral surface of each peep hole 15 is shown. However, the female screw 15a of the peep hole 15 is not necessarily required. The peep hole 15 can also be configured by a through hole that opens in the surface and communicates with each inward groove portion 6.
In that case, the auxiliary set bolt 16 cannot be used, but a tool is inserted through the viewing hole 15 and pressed near the end of the split key member 13a, or a rod-like body or the like is driven into the viewing hole 15 and divided. The fitting position of the divided key member 13a is corrected by pressing near the end of the key member 13a.

(4) In the embodiments described so far, an example in which a pair of peep holes 15 are provided on the left and right with each bolt hole 7 as the center is shown. However, the number of peep holes 15 can be appropriately changed. Only one peep hole 15 can be provided for the split key member 13a, or three or more peep holes 15 can be provided.
Moreover, although the example which divided | segmented the key member 13 into the several key member 13a was shown, it can also implement using the one key member 13 made into the C-shape as a whole, without dividing | segmenting into several.
(5) In the embodiments so far, the example in which the connection state of the two columnar bodies by the key member 13 is confirmed from the outside of the cylindrical portion 1 by visual observation through the peeping hole 15, but as shown in FIG. A hole depth measuring gauge 21 is inserted into the bolt hole 7 until it contacts the set bolt 8 in the bolt hole 7, and the set bolt 8 is screwed into the bolt hole 7 via the hole depth measuring gauge 21. It may be configured to determine the insertion state of the key member 13 by measuring the degree of insertion.
In this case, if the measurement depth by the hole depth measurement gauge 21 is a set value, it is determined that the key member 13 is securely fitted over both the grooves 6 and 11 and is shallower than the set value. Thus, it can be determined that the inserted state of the key member 13 is incomplete, and therefore it is possible to determine the inserted state of the key member 13 without separately providing the peep hole 15 as in the above embodiment.
In addition, the structure which arranged the peeping hole in parallel with the said structure may be sufficient. If it is this, the insertion state of a key member can be confirmed more reliably.
(6) Instead of the peep hole 15, as shown in FIG. 8, the communication hole 22 that opens to the outer peripheral surface of the cylinder portion 1 and communicates with the inward groove portion 6 is provided as a key member other than the bolt hole 7. When a depth measurement gauge 23 that is formed at a position where the 13 is present and can be inserted into the communication hole 22 is provided, and the depth measurement gauge 23 is inserted into the communication hole 22 to a position where it contacts the key member 13. The insertion state of the key member 13 may be determined by measuring the amount of insertion.
In this case, if the insertion amount when the depth measurement gauge 23 is inserted is a set value, it is determined that the key member 13 is securely fitted over both the groove portions 6 and 11, and the set value is set. If it is shallower than that, it can be determined that the inserted state of the key member 13 is incomplete.
In the case of a peep hole, it is necessary to form a hole in a size that allows light to enter the inward groove portion through the communication hole in order to make the insertion state of the key member visible from the outer peripheral surface of the cylinder portion. The communication hole of the present invention only needs to have a size that allows the depth measurement gauge to be inserted even if light does not enter, so that the opening of the communication hole can be reduced. By doing so, the usage-amount of the water stop sealing material at the time of sealing a communicating hole after the connection of both columnar bodies is completed can be decreased.
The peep hole may be used as a communication hole. In this case, it is possible to confirm the insertion state of the key member not only visually but numerically.
(7) In the above embodiment, the measurement gauge capable of determining the insertion state of the key member 13 by measuring the degree of screwing of the set bolt 8 into the bolt hole 7 by the gauge memory has been described. The insertion state of the key member 13 may be determined according to the state when the confirmation gauge 26 as shown in FIG.
The check gauge 26 is formed in a flat operation portion main body 27 by a gauge shaft portion 28 that can be inserted into the bolt hole 7. The length of the gauge shaft portion 28 is determined by the key member 13 as both groove portions 6 and 6. 11 is set to the depth of the bolt hole 7 formed by the set bolt 8 when it is securely fitted over 11.
When the gauge shaft portion 28 is inserted into the bolt hole 7 with the operation portion main body 27 sandwiched therebetween, the tube portion side end surface 27A of the operation portion main body 27 is connected to the tube portion outer peripheral surface 1A as shown in FIG. If it is in contact, it is determined that the key member 13 is securely fitted over both the groove portions 6 and 11, and the cylinder side end surface 27A of the operation portion main body 27 and the cylinder as shown in FIG. If a gap is formed between the outer peripheral surface 1A and the outer peripheral surface 1A, it is possible to determine that the key member 13 is incompletely inserted.
In this case, since it is possible to make a determination by simply inserting it, it is possible to save the trouble of measuring the memory and to improve workability.
(8) When the columnar body is embedded in the soil, as shown in FIG. 10, the bolt hole 7 is made of MC nylon, polyethylene or the like so that water does not enter from the bolt hole 7 into which the set bolt 8 is screwed. The formed water stop pin 24 may be fitted.
The water stop pin 24 has a diameter-increased head portion 24a that fits into a counterbore 7a formed in the bolt hole 7, and is formed from a pin shaft portion 24b that fits into the bolt hole 7. In order to improve the sealing performance when fitting to 7, an adhesive is applied around the water stopping pin 24, or the water stopping pin 24 formed slightly larger than the bolt hole 7 is forcibly fitted. Mounted. In the figure, reference numeral 25 denotes a locking hole for locking the removal tool when it is necessary to remove the water stop pin fitted to the bolt hole 7 for some reason.
In addition, the water stop pin of the structure without the said diameter expansion head may be sufficient. In this case, it is not necessary to form a counterbore in the bolt hole.
(9) In the embodiments described so far, the rotation-suppressing key member 19 is fitted into a state extending over the tube-side notch 17 and the shaft-side notch 18 and fixed by the two mounting bolts 20. Although the example which prevents the relative rotation of the cylinder part 1 of A1 and the axial part 3 of lower support pile A2 was demonstrated, the number of attachment bolts 20 is not restricted to two, and as shown in FIG. The rotation-suppressing key member 19 may be attached with the mounting bolt 20.
That is, even when the rotation inhibiting key member 19 is attached with one mounting bolt 20, the gap when the rotation inhibiting key member 19 is fitted in a state extending over the cylindrical side notch 17 and the shaft side notch 18. Since the rotation restraining key member 19 itself can be prevented from swinging with the mounting bolt 20 as the axis, and the engagement with the cylindrical portion side notch 17 can be prevented from being disengaged. It becomes possible to prevent relative rotation between A1 and the lower support pile A2. And the workability | operativity of the attachment operation | work at the time of attaching the rotation suppression key member 19 can be improved by the part which can reduce the number of the attachment bolts 20. FIG.

Partial cutaway longitudinal section of a columnar body Cross section of the main part of the columnar body Partial enlarged cross-sectional view of the main part of the columnar body Longitudinal cross-sectional view of the main part showing the procedure for connecting columnar bodies Partially cutaway longitudinal sectional view of a columnar body according to another embodiment The longitudinal cross-sectional view of the principal part which shows the connection procedure of the columnar body by another embodiment Partial enlarged cross-sectional view of the main part of the columnar body Partial enlarged cross-sectional view of the main part of the columnar body Partially enlarged vertical sectional view of the main part of the columnar body Partial enlarged cross-sectional view of the main part of the columnar body Partially cutaway longitudinal sectional view of a columnar body according to another embodiment

1 cylinder portion 3 shaft portion 13 key member (engagement means)
15 Peephole (communication hole)
22 Communication hole 23 Gauge for measurement A1 One columnar body A2 The other columnar body

Claims (1)

A cylindrical portion is provided at the end of one columnar body that forms a steel pipe support pile, and a shaft is provided at the end of the other columnar body. The shaft portion is configured to be freely engageable with each other so that the shaft portion enters the tube portion, and in a fitted state between the tube portion and the shaft portion, a predetermined radial direction between the tube portion and the shaft portion is established. In the columnar body provided with an engagement means for engaging the cylindrical portion and the shaft portion in a retaining state by being placed in a position, the engagement state between the cylindrical portion and the shaft portion by the engagement means An engagement state confirmation method for confirming
Forming a bolt hole into which a set bolt for moving the engaging means so as to fit in the predetermined position is opened in the outer peripheral surface of the cylindrical portion;
A gauge shaft portion set to a length corresponding to the depth from the outer peripheral surface of the cylindrical portion of the set bolt screwed into the bolt hole when the engaging means is in the predetermined position is an operating portion. Using the gauge provided on the body,
Based on whether or not the operation portion main body is in contact with the outer peripheral surface of the tube portion when the gauge shaft portion is inserted into the bolt hole until it contacts the set bolt, the tube by the engaging means The engagement state confirmation method which confirms the engagement state of a part and the said shaft part.

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