JP2020118187A - Coupling device - Google Patents

Abstract

To reduce a burden of a coupling operation by simply coupling overlaid coupling objects to each other.SOLUTION: A coupling device 1 comprises an insertion member 10 inserted in each of holes 130 formed on respective overlaid coupling objects, and a locking member 20 fixing the insertion member 10 inserted in the coupling object. The insertion member 10 has a shaft part 11, an engagement part 13, which is formed on the shaft part 11, which can be freely inserted in the hole 130, and which is engaged with the locking member 20, and a contact part 15 formed on the shaft part 11 and contacting a peripheral edge of the hole of the coupling object. The locking member 20 has an insertion hole 21, in which the engagement part 13 and the shaft part 11 can be inserted, and a slide hole 23 inserted in the insertion hole 21, extending in a direction crossing with an insertion direction of the insertion member 10, and having width larger than the shaft part 11 and smaller than the engagement part 13.SELECTED DRAWING: Figure 7

Description

The present invention relates to a connecting device for connecting overlapping connection objects to each other.

In the past, in order to prevent structures such as steel towers from falling down due to typhoons, earthquakes, etc., a strong foundation has been built under the structure. A pile with a length of several tens of meters may be used for the foundation, and a vertical shaft of a suitable depth is excavated to fill the pile.
In the deep foundation method of burying piles used for foundation deeply in the ground, it is necessary to construct soil retaining along the inner wall of the shaft to prevent the inner wall of the shaft from collapsing. The soil retaining is constructed by using a liner plate as the soil retaining material and connecting a plurality of liner plates along the inner wall surface of the shaft in the circumferential direction (transverse cross-sectional direction) and the height direction (depth direction) of the shaft.
A bolt and a nut are used as a connecting device for connecting the liner plates. The bolts are inserted into the through holes formed in the flanges of the liner plates, and the nuts are screwed into the bolts to connect the liner plates adjacent to each other (see, for example, Patent Document 1).

JP, 2009-257070, A

By the way, when constructing an earth retaining wall on the inner wall surface of one shaft, the number of connecting points for connecting a plurality of liner plates installed on the inner wall surface of the shaft to each other by bolts and nuts may exceed several thousand. When an operator (same below) manually inserts a bolt into an insertion hole formed in a flange to screw a nut at the tip of the bolt at all of the connection points, the burden on the operator is great. It was difficult to improve the construction efficiency.

Therefore, the present invention has been made in view of the above problems, can be easily connected overlapping objects to be connected, reduce the burden on the operator, it is possible to improve the construction efficiency. An object is to provide a coupling device.

In order to solve the above-mentioned problems, the present invention provides an insertion member that is inserted into the holes formed in each of the stacked connection objects, and a lock member that fixes the insertion member that is inserted into the connection object. And the insertion member includes a shaft portion, an engagement portion that is formed in the shaft portion and that is insertable through the hole and that engages with the lock member, and the insertion member that is formed in the shaft portion. A contact portion that comes into contact with a peripheral portion of the hole of the object to be connected, the lock member, an insertion hole through which the engaging portion and the shaft portion are insertable, and the insertion portion that communicates with the insertion hole. A slide hole that extends in a direction intersecting the insertion direction of the member and has a width that is larger than the shaft portion and smaller than the engagement portion.

Further, the thickness of the lock member may be changed so as to continuously increase from the side of the insertion hole toward the side of the slide hole.

Further, it may have a stopper structure for preventing relative movement of the lock member with respect to the shaft portion when the shaft portion is in the slide hole.

ADVANTAGE OF THE INVENTION According to this invention, the connection object which was piled up can be easily connected, and the load of connection work can be reduced.

FIG. 6 is a perspective view of liner plates connected to each other in a circumferential direction and a height direction. It is a figure for demonstrating the structure of the insertion member of the coupling device which concerns on embodiment of this invention. It is a figure for demonstrating the structure of the lock member of the coupling device which concerns on embodiment of this invention. It is a figure for demonstrating the process of connecting a liner plate with the connecting device which concerns on embodiment of this invention. It is a figure for demonstrating the process of connecting a liner plate with the connecting device which concerns on embodiment of this invention. It is a figure for demonstrating the process of connecting a liner plate with the connecting device which concerns on embodiment of this invention. It is a figure for demonstrating the process of connecting a liner plate with the connecting device which concerns on embodiment of this invention. It is a figure for demonstrating the structure of the lock member which concerns on a modification. It is a figure for demonstrating the structure of the lock member which concerns on another modification.

A preferred embodiment of the present invention will be described with reference to the drawings. It should be noted that the embodiment described below is merely an example, and various embodiments can be adopted within the scope of the present invention.

FIG. 1 is a perspective view of liner plates 100 connected to each other in a circumferential direction and a height direction. The liner plate 100 is made of, for example, a steel plate provided along the inner wall surface of the shaft. The liner plate 100 is a member for constructing an earth retention to prevent the inner wall surface of the vertical shaft from collapsing.
The liner plate 100 to which the coupling device 1 according to the embodiment of the present invention is applied has a plate surface portion 110 that faces the inner wall surface of the shaft, and a flange portion 120 that is provided upright at the edge of the plate surface portion 110. ..

The plate surface 110 is arranged such that its main surface faces the inner wall of the shaft. The plate surface portion 110 is formed in a rectangular shape in a plan view, and is formed by, for example, curving a steel plate in a wavy shape along its lateral direction and curving it in an arc shape along its longitudinal direction. Further, the plate surface portion 110 is not limited to being formed by curving in a wave shape or an arc shape, and may be formed in a flat plate shape.

The flange portion 120 is provided on the edge portion of the plate surface portion 110, and has a long flange portion 121 and a short flange portion 122. The long-sided flange portion 121 is provided at the two edges on the long side of the plate surface portion 110, and is formed integrally with the plate surface portion 110. The long-sided flange 121 is formed by bending the edge portion on the long side so as to be orthogonal to the main surface when the plate surface portion 110 is formed. The long-sided flange portion 121 projects toward the inside of the vertical shaft. The longitudinal flange portion 121 is not limited to being integrally formed with the plate surface portion 110, and may be joined to the plate surface portion 110 by welding.

A plurality of insertion holes 130 are formed in each longitudinal flange 121. A connecting device 1 to be described later that connects the liner plates 100 adjacent to each other in the height direction to each other is inserted into the insertion hole 130. The insertion holes 130 are formed at predetermined intervals along the extending direction of the longitudinal flange portion 121.

The short flange portion 122 is formed of, for example, a steel plate that can be joined to the plate surface portion 110 by welding. The short-side flange portion 122 is joined to the two short-side edges of the plate surface portion 110 by welding, and is erected on the main surface of the plate surface portion 110. A plurality of insertion holes 140 are formed in each short flange portion 122. A well-known connecting member that connects the liner plates 100 that are adjacent to each other in the circumferential direction to each other may be inserted into the insertion hole 140, or the connecting device 1 described below may be inserted. The insertion holes 140 are formed at predetermined intervals along the extending direction of the short flange portion 122.

Thus, one liner plate 100 has one plate surface part 110, two long side flange parts 121, and two short side flange parts 122. The liner plates 100 adjacent to each other in the height direction and the circumferential direction are arranged such that the long side flange portions 121 and the short side flange portions 122 have main surface directions parallel to each other.
Adjacent liner plates 100 do not have their short flanges 122 continuous to each other in the extending direction of the shaft, but are staggered by being shifted in the circumferential direction of the shaft by about half the length of the liner plate 100 in the longitudinal direction. It is arranged.

Adjacent liner plates 100 having the above structure are connected to each other by the connecting device 1 according to the embodiment of the present invention. Adjacent liner plates 100 are connected to each other by overlapping the longitudinal flange portions 121 with each other to align the insertion holes 130 and inserting the connection device 1. 2A is a perspective view of the insertion member 10 of the coupling device 1 as seen from the tip (insertion) side, and FIG. 2B is a side view of the insertion member 10 of the coupling device 1. 3A is a perspective view of the lock member 20 of the coupling device 1, and FIG. 3B is a side view of the lock member 20 of the coupling device 1.

The coupling device 1 is made of steel. The connection device 1 connects the liner plates 100 (connection objects) that are stacked in the height direction (up and down) to each other. The connection device 1 includes an insertion member 10 and a lock member 20.
The insertion member 10 includes a shaft portion 11, an engagement flange portion (engagement portion) 13, and a contact flange portion (contact portion) 15. The insertion member 10 has one end inserted into the insertion holes 130 formed in the longitudinal flange portions 121 of the liner plates 100 stacked in the height direction and aligned with each other, and the other end is lower in the height direction (one side). Contact the long side flange portion 121 of the liner plate 100 on the side of the.

The shaft portion 11 is formed in a cylindrical shape, the engaging flange portion 13 is provided on one end side in the axis x direction, and the contact flange portion 15 is provided on the other end side. The engaging collar portion 13 and the contact collar portion 15 are formed concentrically with the shaft portion 11. The length of the shaft portion 11 along the axis line x is substantially the same as the combined thickness of the liner plate 100 with the longitudinal flange portions 121 and the plate thickness of the lock member 20. In other words, the longitudinal flange portion 121 and the lock member 20 in the overlapped state are housed with each other with almost no gap between the surfaces of the engagement flange portion 13 and the contact flange portion 15 facing each other.

The engagement flange portion 13 is a circular portion that extends radially outward from the outer circumference of the shaft portion 11, and has a diameter smaller than the diameter of the insertion hole 130. The engaging flange portion 13 is formed at the tip (one end) of the shaft portion 11 in the insertion direction I (see FIG. 4b) of the longitudinal flange portion 121 into the insertion hole 130, and the liner plates 100 are stacked in the height direction. It is insertable through the insertion hole 130 and engages with the lock member 20.

The contact collar portion 15 is a circular portion that extends annularly outward in the radial direction from the outer periphery of the shaft portion 11, and has a diameter larger than the diameter of the insertion hole 130. The contact flange portion 15 is formed at the rear end (the other end) of the shaft portion 11 in the insertion direction I and contacts the peripheral edge portion of the insertion hole 130 of the lower liner plate 100.

The diameter R1 of the shaft portion 11, the diameter R2 of the engaging collar portion 13, and the diameter R3 of the contact collar portion 15 have a relationship of R1<R2<R3.

The locking member 20 engages with the engaging flange portion 13 of the insertion member 10 on the side of the liner plate 100 that is the upper side of the liner plates 100 that are stacked in the height direction, and the stacked liner plate 100 is inserted into the insertion member. It is connected with the contact flange portion 15 of 10 by sandwiching it. In the present embodiment, the lock member 20 is formed in a rounded rectangular shape or an elliptical shape in a plan view, but may be a rectangular shape.

The lock member 20 has an insertion hole 21 and a slide hole 23. The insertion hole 21 and the slide hole 23 penetrate the lock member 20 in the thickness direction. The insertion hole 21 is formed in a circular shape in plan view at a position displaced from the center of the lock member 20. The insertion hole 21 is formed in such a size that the engaging flange portion 13 of the insertion member 10 can be inserted therein.

The slide hole 23 extends from the insertion hole 21 in an intersecting direction that intersects the insertion direction I of the insertion member 10, and specifically, from the peripheral portion of the insertion hole 21 to the major axis direction (intersection direction) L of the lock member 20. Extends along. The slide hole 23 allows insertion of the engagement flange portion 13 while allowing relative movement of the lock member 20 with respect to the shaft portion 11 in the major axis direction L of the direction intersecting the insertion direction I of the insertion member 10. Do not allow. That is, the diameter of the insertion hole 21 is formed to be larger than the diameter R1 of the shaft portion 11 of the insertion member 10 and the diameter R2 of the engagement flange portion 13 and smaller than the diameter R3 of the contact flange portion 15 of the insertion member 10. ..
Thereby, the lock member 20 locks the insertion member 10 and prevents the insertion member 10 from falling off. The slide hole 23 is formed so as to allow sliding movement of the lock member 20 with respect to the shaft portion 11 along the long-axis direction L, and not allow movement of the insertion member 10 in a direction opposite to the insertion direction I. .. That is, the dimension of the slide hole 23 in the minor axis direction S of the lock member 20 is larger than the diameter R1 of the shaft portion 11 and smaller than the diameter R2 of the engaging collar portion 13.

The thickness of the lock member 20 continuously changes in a side view. Specifically, the thickness D1 of the lock member 20 on the insertion hole 21 side is smaller than the thickness D2 of the slide hole 23 side. The thickness of the lock member 20 continuously increases from the insertion hole 21 side toward the slide hole 23 side.

Next, a method of connecting the liner plates 100 adjacent to each other in the height direction will be described. FIG. 4A is a perspective view showing a state in which the insertion member 10 is inserted through the insertion holes 130 of the liner plate 100 that overlap each other in the height direction, and FIG. 4B is a longitudinal flange of FIG. 4A. It is sectional drawing along the longitudinal direction of the part 121. 5A is a perspective view showing a state in which the lock member 20 is brought close to the insertion member 10 inserted through the insertion hole 130, and FIG. 5B is a longitudinal view of the longitudinal flange portion 121 shown in FIG. 5A. It is sectional drawing which followed the direction. FIG. 6A is a perspective view showing a state in which the insertion member 10 is inserted into the insertion hole 21 of the lock member 20, and FIG. 6B shows FIG. 6A along the longitudinal direction of the longitudinal flange portion 121. FIG. 7A is a perspective view showing a state in which the lock member 20 is relatively moved with respect to the insertion member 10, and FIG. 7B is a view showing FIG. 7A in the longitudinal direction of the longitudinal flange portion 121. FIG.

For example, in the case of constructing earth retaining on the inner wall surface of the vertical shaft, the liner plate 100 is connected in the height direction as the vertical shaft is dug down. The liner plate 100 to be newly connected is connected to the existing liner plate 100 from below. First, the liner plate 100 to be newly connected is lifted by a jack or the like to be brought close to the lower side of the existing liner plate 100, and both insertion holes 130 are aligned with each other. In this state, the operator inserts the insertion member 10 into the insertion hole 130 of the upper longitudinal flange portion 121 of the lower liner plate 100 and then the insertion hole 130 of the longitudinal flange portion 121 of the upper liner plate 100. The operator prepares the lock member 20 in a state in which the contact flange portion 15 of the insertion member 10 is pressed upward against the longitudinal flange portion 121 of the lower liner plate 100.

Next, the operator inserts the engaging flange portion 13 of the insertion member 10 that has been inserted from the lower liner plate 100 and advanced from the insertion hole 130 of the longitudinal flange portion 121 of the upper liner plate 100 into the insertion hole 21 of the lock member 20. Pass through. In this state, the lock member 20 is placed on the longitudinal flange portion 121 of the upper liner plate 100. The lock member 20 placed on the longitudinal flange portion 121 has the slide hole 23 substantially along the longitudinal direction of the longitudinal flange portion 121.

Next, the operator hits the lock member 20 horizontally with a predetermined tool from the side of the slide hole 23 opposite to the insertion hole 21. As a result, the lock member 20 slides with respect to the insertion member 10, and the shaft portion 11 of the insertion member 10 enters the slide hole 23. By the sliding movement of the lock member 20, the engagement flange portion 13 of the insertion member 10 comes into contact with the surface of the lock member 20 at the peripheral edge portion of the slide hole 23. This operation is performed in each insertion hole 130 of the liner plate 100. As a result, the upper and lower liner plates 100 in the height direction are locked by the contact flange portion 15 from the lower side of the longitudinal flange portion 121 and between the engaging flange portion 13 and the longitudinal flange portion 121 from the upper side. The members 20 are firmly clamped by the members 20 and are connected to each other.

With the connecting device 1 as described above, it becomes possible to connect the liner plates 100 to each other very easily and quickly as compared with the conventional connecting technique of the liner plates 100 using the bolts and nuts. That is, (1) the insertion member 10 is inserted into the insertion hole 130 of the liner plate 100, (2) the insertion member 10 is inserted into the insertion hole 21 of the lock member 20, and (3) the lock member 20 is struck by a predetermined tool. The liner plates 100 can be easily connected to each other simply by sliding them.

Moreover, since the thickness of the lock member 20 changes along the major axis direction L thereof, the lock member 20 is provided between the engagement flange portion 13 of the insertion member 10 and the longitudinal flange portion 121 of the liner plate 100 like a wedge. To slide. Thereby, as the lock member 20 enters between the engagement flange portion 13 and the longitudinal flange portion 121 of the liner plate 100, the engagement flange portion 13 of the insertion member 10 moves away from the longitudinal flange portion 121 (upward). Then, the contact flange 15 moves in the direction (upward) pressed against the longitudinal flange 121. As a result, the liner plate 100 is firmly sandwiched between the contact flange portion 15 and the lock member 20 at the longitudinal flange portion 121. Thus, a strong connection between the liner plates 100 can be achieved.

<Other>
Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and includes all aspects included in the concept of the present invention and the scope of the claims. Further, the respective configurations may be appropriately and selectively combined so as to achieve at least a part of the above-mentioned problems and effects. Further, for example, the shape, material, arrangement, size, etc. of each constituent element in the above-described embodiment can be appropriately changed depending on the specific usage mode of the present invention. For example, when the shaft portion 11 of the insertion member 10 is in the slide hole 23 of the lock member 20, a stopper structure that prevents relative movement of the lock member 20 with respect to the shaft portion 11 may be provided.

FIG. 8 is a diagram for explaining the configuration of the lock member 20A according to the first modification. Note that only the parts different from the lock member 20 will be described below, and the description of the same configuration as the lock member 20 will be omitted. For example, the stopper structure is a pair of protrusions 24A provided in the slide hole 23. The pair of protrusions 24A are provided on the pair of opposing wall surfaces 25A of the slide hole 23 extending along the major axis direction L. The pair of protrusions 24A project from the facing wall surface 25A so as to approach each other. The pair of protrusions 24A are provided on each of the opposing wall surfaces 25A and extend in the thickness direction of the lock member 20A.

In the modified example 1, the cross-sectional shape of the protrusion 24A intersecting the insertion direction I is semicircular. However, the cross-sectional shape of the protrusion 24A is not particularly limited and may be another shape. Further, in the modified example 1, the pair of protrusions 24</b>A are provided at the position of the slide hole 23 adjacent to the insertion hole 21. However, the position at which the protrusion 24A is provided is not particularly limited as long as there is a space between the pair of protrusions 24A and the end wall surface 26A of the slide hole 23 for accommodating the shaft portion 11.

The pair of protrusions 24A are provided at a predetermined distance D3 from each other. The distance D3 is slightly smaller than the diameter R2 of the shaft portion 11 of the insertion member 10. When the lock member 20 is struck and slid by a predetermined tool, the protrusion 24A moves so as to ride on the outer peripheral surface of the shaft 11, and the protrusion 24A rides over the shaft 11. The protrusion 24A can effectively prevent the insertion member 10 from returning to the insertion hole 21 side between the protrusion 24A and the end wall surface 26A.
Although the pair of protrusions 24A is provided in the first modification, the protrusion 24A is provided only on one of the opposing wall surfaces 25A as long as the insertion member 10 can be prevented from returning to the insertion hole 21 side. It may be.

FIG. 9 is a diagram for explaining the configuration of the lock member 20B according to Modification 2. In addition, below, only the part different from the lock member 20 will be described, and the description of the same configuration as the lock member 20 will be omitted. For example, the stopper structure is a recess 24B formed in the lock member 20. The recess 24B is formed in a recess from one surface of the lock member 20 at the end position of the slide hole 23 in the major axis direction L.

The concave portion 24B has a circular shape corresponding to the shape of the engaging flange portion 13. When the lock member 20B slides and the shaft portion 11 of the insertion member 10 reaches a predetermined position on the end wall surface 25B side of the slide hole 23, the engaging collar portion 13 falls into the recess 24B. In a state in which the engaging brim portion 13 has fallen into the recess 24B, the outer peripheral surface of the engaging brim portion 13 is at least partially in contact with the inner peripheral surface 26B of the concave portion 24B, and the engagement facing the contact brim portion 15 is engaged. The surface of the flange 13 is in contact with the bottom surface 27B of the recess 24B.

The recessed portion 24B is in a state in which at least the inner peripheral surface of the recessed portion 24B on the slide hole 23 side and the outer peripheral surface of the engagement flanged portion 13 partially face each other in a state in which the engaging collar portion 13 has fallen into the recessed portion 24B. Is formed. Further, the depth from one surface of the lock member 20 to the bottom surface 27B of the recess 24B is such that the engagement flange portion 13, the contact flange portion 15, and the lock member 20 are in a state in which the engagement flange portion 13 has fallen into the recess portion 24B. Between the longitudinal flange portions 121 of the liner plate 100 that are connected to each other, that is, between the longitudinal flange portion 121 of the lower liner plate 100 and the longitudinal flange portion 121 of the upper liner plate 100. It is set to maintain a state in which there is no gap between them, that is, a state in which the engagement flange portion 13 and the contact flange portion 15 firmly sandwich the vertically overlapping longitudinal flange portion 121 and the lock member 20. There is. As a result, the insertion member 10 is locked in the recess 24B, so that the sliding movement of the lock member 20 again is not permitted.

Further, in the above embodiment, the planar shapes of the engaging flange portion 13 and the contact flange portion 15 are circular, but they may be elliptical or polygonal.

Further, in the above-described embodiment, the lock member 20 has a thickness that varies along the long-axis direction L thereof, but may have a constant thickness.

1 Connection Device 10 Insertion Member 11 Shaft 13 Engagement Collar (Engagement)
15 Contact collar (contact part)
20 lock member 21 insertion hole 23 slide hole 100 liner plate (object to be connected)
121 Longitudinal flange portion 130 Insertion hole I Insertion direction L Long axis direction (intersection direction)

Claims (3)

An insertion member that is inserted into a hole formed in each of the overlapping connection objects,
A lock member for fixing the insertion member inserted into the connection target;
A coupling device comprising:
The insertion member includes a shaft portion, an engagement portion formed in the shaft portion that is insertable through the hole and engages with the lock member, and a peripheral portion of the hole of the connection target formed in the shaft portion. A contact portion that comes into contact with
The lock member is
An insertion hole through which the engagement portion and the shaft portion are freely inserted, and a communication hole that communicates with the insertion hole, extends in a direction intersecting the insertion direction of the insertion member, and is larger than the shaft portion and smaller than the engagement portion. And a slide hole having a width. The connecting device according to claim 1, wherein the thickness of the lock member is changed so as to continuously increase from the insertion hole side toward the slide hole side. The coupling device according to claim 1, further comprising a stopper structure that prevents relative movement of the lock member with respect to the shaft portion when the shaft portion is in the slide hole.

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