JP2016118075A - Structure holder and structure holding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a casing holder capable of suppressing damage of a structure while improving working efficiency.SOLUTION: A casing holder 1 holds a casing CS inserted into a hole BH formed in the ground GR. The casing holder 1 includes a frame body 3 and a holding section 5. The frame body 3 has an opening for inserting the casing CS therein. The holding section 5 is provided in the frame body 3 so as to hold the casing CS. The holding section 5 includes a shaft section 5b, a pair of support sections and a rotary member 5a. The pair of support sections support the shaft section 5b. The rotary member 5a rotates around the shaft section 5b so as to project to the opening side relative to an edge of the opening.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a structure holder and a structure holding method for holding a structure to be inserted into a hole formed in the ground.

  In the method for creating the foundation pile described in Patent Document 1, a casing tube is inserted into the hole.

  Generally, the casing tube is formed by connecting a plurality of casings (a plurality of structures). And in the operation | work which connects a casing and a casing, the casing holder holding a casing is utilized.

  A general casing holder 100 will be described with reference to FIG. FIG. 7A is a plan view showing the casing holder 100. FIG.7 (b) is sectional drawing along the BB line of Fig.7 (a). The casing holder 100 includes a quadrangular annular frame 102 having an opening 102 a and four wedges 104.

  The holding of the casing CS will be described. First, the frame body 102 is installed on the ground surface. Next, the casing CS is suspended by a crane and inserted into the opening 102a and the hole BH. Next, each wedge 104 is hit with a hammer from above the wedge 104 and driven between the casing CS and the frame 102. As a result, the casing CS is held. Next, another casing CS is connected to the casing CS.

  Release of holding of the casing CS will be described. Each of the wedges 104 is hit by a hammer from the side of the wedge 104 and is extracted from between the casing CS and the frame body 102. As a result, the holding of the casing CS is released.

JP-A-5-71124

  However, the general casing holder 100 may have low work efficiency or damage the casing CS.

  Specifically, the reduction in work efficiency is as follows. That is, since the wedge 104 is hit with a hammer when the wedge 104 is attached and detached, the labor of the operator is great. Further, when the wedge 104 is attached / detached, the wedge 104 is dropped into the hole BH, and it becomes necessary to collect the wedge 104 or prepare a new wedge 104, which may increase the amount of work. Further, when the wedge 104 is attached or detached, the casing CS is dropped into the hole BH, and it is necessary to lift the casing CS from the hole BH, which may increase the amount of work. As described above, when a large amount of labor is required for the worker or the amount of work increases, the work efficiency decreases.

  Specifically, damage to the casing CS is as follows. That is, since the wedge 104 is hit with a hammer when the wedge 104 is attached and detached, a strong impact is applied to the wedge 104. Therefore, the casing CS may be damaged by the wedge 104. Further, the hammer may accidentally hit the casing CS and the casing CS may be damaged. Further, when the frame body 102 is hit with a hammer in order to smoothly perform the detachment of the wedge 104, the frame body 102 moves and hits the casing CS, or the hammer accidentally hits the casing CS. It may be damaged.

  This invention is made | formed in view of the said subject, The objective is to provide the structure holder and structure holding method which can suppress damage to a structure, improving work efficiency.

  According to the 1st viewpoint of this invention, a casing holder hold | maintains the structure inserted in the hole formed in the ground. The casing holder includes a frame and at least one holding portion. The frame has an opening for inserting the structure. A holding part is provided in the frame and holds the structure. The holding portion includes a shaft portion, a pair of support portions, and a rotating portion. The pair of support portions support the shaft portion. The rotating portion protrudes closer to the opening than the edge of the opening by rotating around the shaft portion.

  In the structure holder according to the aspect of the invention, it is preferable that the distance between the shaft portion and the circumferential surface of the rotating portion varies depending on the position on the circumferential surface of the rotating portion.

  In the structure holder of the present invention, it is preferable that the rotating portion has a columnar shape. It is preferable that the shaft portion is provided eccentrically with respect to the center line of the rotating portion.

  In the structure holder of the present invention, it is preferable that a non-slip is formed in a region of the peripheral surface of the rotating portion that protrudes toward the opening due to the rotation of the rotating portion.

  In the structure holder of the present invention, it is preferable that the rotating portion protrudes toward the opening by rotating in a predetermined rotating direction. It is preferable that the non-slip includes a tooth row having a sawtooth shape in cross section, and each of the plurality of teeth constituting the tooth row is curved in an arc shape toward the predetermined rotation direction.

  In the structure holder of the present invention, it is preferable that the holding portion further includes a handle formed at a predetermined position on the peripheral surface of the rotating portion.

  In the structure holder of the present invention, it is preferable that a plurality of the holding portions are provided.

  According to the second aspect of the present invention, the structure holding method uses a structure holder that holds a structure to be inserted into a hole formed in the ground. The structure holder includes a frame and at least one holding portion. The frame has an opening for inserting the structure. A holding part is provided in the frame and holds the structure. The holding portion includes a shaft portion, a pair of support portions, and a rotating portion. The pair of support portions support the shaft portion. The rotating portion protrudes closer to the opening than the edge of the opening by rotating around the shaft portion. In the structure holding method, the rotating unit is rotated in a second rotating direction opposite to the first rotating direction, and the rotating unit is retracted outside the edge of the opening; A step of inserting the structure into the opening of the frame body; and a step of rotating the rotating part in the first rotating direction to bring the rotating part into contact with the structure.

  ADVANTAGE OF THE INVENTION According to this invention, damage to a structure can be suppressed, improving work efficiency.

It is a perspective view which shows the casing holder and casing which concern on embodiment of this invention. It is a perspective view which shows the casing holder which concerns on embodiment of this invention. It is a top view which shows the casing holder which concerns on embodiment of this invention. (A) It is a side view which shows the holding | maintenance part of the casing holder which concerns on embodiment of this invention. (B) It is a front view which shows the holding | maintenance part of the casing holder which concerns on embodiment of this invention. (A) It is an expanded view which shows the surrounding surface of the rotation member of the casing holder which concerns on embodiment of this invention. (B) It is a side view which shows the slip prevention of the rotation member of the casing holder which concerns on embodiment of this invention. (A)-(d) It is a procedure figure which shows the casing holding method which uses the casing holder which concerns on embodiment of this invention. (A) It is a top view which shows a general casing holder. (B) It is sectional drawing along the BB line of Fig.6 (a).

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof is not repeated. In the present embodiment, the X axis and the Y axis are parallel to the horizontal plane, and the Z axis is parallel to the vertical line. The X axis, the Y axis, and the Z axis are orthogonal to each other.

  FIG. 1 is a perspective view showing a casing holder 1 and a casing CS according to an embodiment of the present invention. The casing holder 1 holds a casing CS to be inserted into a hole BH (for example, an excavation hole) formed in the ground GR. The casing CS is an example of a structure, and is cylindrical in this embodiment. For example, the outer diameter of the casing CS is 980 mm, the length of the casing CS is 1000 mm, and the weight of the casing CS is 600 kg. However, the size of the casing CS is not limited to these. The casing CS is not limited to a cylindrical shape, and may be, for example, a cylindrical shape (for example, a rectangular tube shape) other than a cylindrical shape, or a column shape (for example, a columnar shape or a rectangular column shape).

  The casing holder 1 functions as a structure holder. The casing holder 1 is made of metal, for example. The casing holder 1 includes a frame body 3, four holding portions 5, and four hook portions 7. The frame 3 is formed of, for example, a steel material (for example, SS400).

  2 and 3 are a perspective view and a plan view showing the casing holder 1, respectively. The frame 3 has a circular opening 3a for inserting the casing CS. For example, the diameter of the opening 3a is 1000 mm. However, the size of the opening 3a is not limited to this.

  The four holding portions 5 hold the casing CS (FIG. 1). Each of the holding portions 5 is provided on the upper surface of the frame body 3. The four holding parts 5 are arranged at equal intervals on the upper surface of the frame body 3 along the edge 3b of the opening 3a. Of the four holding portions 5, two holding portions 5 face each other, and the other two holding portions 5 face each other.

  Each of the holding portions 5 includes a rotating member 5a, a shaft portion 5b, a pair of support portions 5c, a handle 5d, and a pair of shaft portion covers 5e (FIG. 3). The rotation member 5a functions as a rotation unit. The rotating member 5a is made of, for example, carbon steel (for example, S45C). In FIGS. 1 and 2, the shaft cover 5e is omitted for simplification of the drawings.

  The rotating member 5a has a columnar shape, and rotates around the shaft portion 5b in the rotating direction R1 (predetermined rotating direction or first rotating direction) so that the opening 3a has a larger opening than the edge 3b. Protrudes to the side. In FIG. 2, the rotation member 5 a protruding toward the opening 3 a is indicated by a two-dot chain line. In this specification, the fact that the rotating member 5a protrudes toward the opening 3a means that the rotating member 5a protrudes toward the center line CL of the opening 3a. The rotation direction R1 is a direction in which the rotation member 5a rotates toward the opening 3a on the opening 3a side.

  Specifically, the shaft portion 5b is fixed to the rotating member 5a. The shaft portion 5b is rotatably supported by the pair of support portions 5c. Accordingly, the rotating member 5a rotates together with the shaft portion 5b. The turning member 5a protrudes toward the opening 3a by turning in the turning direction R1.

  A pair of support parts 5c are flat form, and are located in a line at intervals. The pair of support portions 5 c are formed so as to stand up from the upper surface of the frame 3. A rotation member 5a is disposed between the pair of support portions 5c.

  The handle 5d is gripped and operated by an operator. The handle 5d has a cylindrical shape and is formed at a predetermined position on the peripheral surface 11 of the rotating member 5a so as to be orthogonal to the peripheral surface 11 of the rotating member 5a. The pair of shaft portion covers 5e is provided corresponding to both ends of the shaft portion 5b, and is attached to the support portion 5c so as to cover both ends of the shaft portion 5b. The pair of shaft portion covers 5e do not contact both ends of the shaft portion 5b and do not hinder the rotation of the shaft portion 5b. The shaft cover 5e may not be provided.

  Crane hooks are hooked on the four hooks 7. For example, the hook of the crane is hooked on the hook 7 and the casing holder 1 is moved by the crane. The hook portion 7 is provided on the upper surface of the frame 3 and is disposed between the holding portions 5 adjacent to each other.

  As described above with reference to FIGS. 1 to 3, according to the present embodiment, the four rotating members 5 a protrude toward the opening 3 a by rotating around the shaft portion 5 b. Therefore, the operator can hold the casing CS on the four rotating members 5a by operating the handle 5d to rotate the rotating member 5a.

  Since the hammer CS is not required for the work of holding the casing CS, the labor of the operator can be reduced. Further, since the wedge is not used to hold the casing CS, the wedge is not dropped into the hole BH, and the work amount can be suppressed. In addition, since there is no wedge removal operation, the casing CS is prevented from dropping into the hole BH, and the amount of work can be suppressed.

  Therefore, according to this embodiment, compared with the general casing holder 100 described with reference to FIG. 7, the amount of work can be suppressed while reducing the labor of the operator. As a result, the efficiency of the work for holding the casing CS is improved. In addition, since a wedge and a hammer are not used, damage to the casing CS can be suppressed.

  With reference to FIG. 4, the detail of the rotation member 5a of the holding | maintenance part 5 and the axial part 5b is demonstrated. FIG. 4A and FIG. 4B are a side view and a front view showing the holding portion 5, respectively. 4B shows the holding unit 5 when the holding unit 5 is viewed from the direction indicated by the arrow A in FIG. 4A (that is, from the opening 3a side).

  First, the structure of the rotating member 5a and the shaft portion 5b will be described. The rotating member 5 a is substantially circular in a side view and has a non-slip 9. In FIG. 4B, the non-slip 9 is omitted for simplification of the drawing. The shaft portion 5b is provided eccentric to the center line C1 of the rotating member 5a. That is, the axis C2 of the shaft portion 5b is deviated from the center line C1 of the rotating member 5a. Accordingly, the distance between the axis C2 of the shaft portion 5b and the peripheral surface 11 of the rotating member 5a varies depending on the position on the peripheral surface 11 of the rotating member 5a. Both end portions of the shaft portion 5b are loosely inserted into through holes 5f formed in the pair of support portions 5c.

  The rotating member 5a has a protrusion P. The protruding point P of the rotating member 5a is a portion of the rotating member 5a that protrudes most toward the opening 3a side, that is, toward the center line CL of the opening 3a. A distance Q between the protrusion P of the rotating member 5a and the axis C2 of the shaft portion 5b increases as the rotating member 5a rotates in the rotation direction R1. Therefore, the rotation member 5a protrudes more toward the opening 3a side, that is, toward the center line CL (FIG. 2) of the opening 3a, as it rotates in the rotation direction R1. On the other hand, the distance Q decreases as the rotating member 5a rotates in the rotation direction R2 (second rotation direction). Therefore, as the rotation member 5a rotates in the rotation direction R2, the retraction member 5a retreats more toward the outside of the opening 3a, that is, in a direction away from the center line CL of the opening 3a.

  Next, the operation of the rotating member 5a will be described. The turning member 5a can turn in a turning direction R1 or a turning direction R2 opposite to the turning direction R1. In FIG. 4A, the rotation direction R1 is counterclockwise, and the rotation direction R2 is clockwise. The turning member 5a moves to the protruding position by turning in the turning direction R1. The protruding position is a position where the rotating member 5a protrudes toward the opening 3a from the edge 3b of the opening 3a. On the other hand, the rotation member 5a moves to the retracted position by rotating in the rotation direction R2. The retracted position is a position where the rotating member 5a is retracted to the outside of the edge 3b of the opening 3a. FIG. 4A shows the rotating member 5a located at the reference position among the retracted positions.

  The reference position is defined as follows. Since the shaft portion 5b is eccentric, the lowermost position of the rotating member 5a moves up and down according to the rotation of the rotating member 5a. The reference position is a position when the lowermost part of the rotating member 5a is located at the uppermost position. 2 and 3, the rotating member 5a is located at the initial position of the retracted position. The initial position is a position where the rotation member 5a rotates in the rotation direction R2 and the handle 5d contacts the frame body 3.

  Next, the operation of the rotating member 5a will be described. The operator can move the turning member 5a to the protruding position by operating the handle 5d to turn the turning member 5a in the turning direction R1. On the other hand, the operator can move the turning member 5a to the retracted position by operating the handle 5d to turn the turning member 5a in the turning direction R2. The operator can easily turn the turning member 5a by operating the handle 5d. The handle 5d is provided on the peripheral surface 11 of the rotating member 5a so that the axis C3 of the handle 5d passes through the center line C1 of the rotating member 5a. The handle 5d is inclined at approximately 45 degrees with respect to the horizontal line when the rotating member 5a is located at the reference position. That is, the angle θ is approximately 45 degrees.

  As described above with reference to FIG. 4, according to the present embodiment, the distance between the shaft portion 5b and the peripheral surface 11 of the rotating member 5a is the position on the peripheral surface 11 of the rotating member 5a. It depends on. Accordingly, by rotating the rotating member 5a while keeping the position of the shaft portion 5b constant, the rotating member 5a is protruded toward the opening 3a, or the rotating member 5a is moved more than the edge 3b of the opening 3a. It can be evacuated to the outside. As a result, the structure of the holding part 5 can be simplified. Further, since the amount of protrusion of the rotating member 5a toward the opening 3a differs depending on the amount of rotation of the rotating member 5a, as long as the non-slip 9 comes into contact with the casing CS, one casing holder 1 has various sizes. The casing CS can be held.

  Moreover, according to this embodiment, the rotation member 5a is cylindrical, and the axial part 5b is eccentric. Accordingly, it is possible to easily form a configuration in which the distance between the shaft portion 5b and the peripheral surface 11 of the rotating member 5a varies depending on the position on the peripheral surface 11 of the rotating member 5a.

  Furthermore, according to the present embodiment, the casing CS held by the four holding portions 5 is lifted by the crane, so that each turning member 5a that is in contact with the casing CS is turned in the turning direction R2. Therefore, the space | interval of the rotation member 5a and the rotation member 5a which mutually opposes spreads, and the holding | maintenance of casing CS can be cancelled | released easily.

  Since hammering is not required for the operation of releasing the holding of the casing CS, the labor of the operator can be reduced, and the efficiency of the operation of releasing the holding of the casing CS can be improved. In addition, it is possible to suppress the casing CS from being damaged when releasing the holding of the casing CS.

  In addition, holding | maintenance of casing CS can also be cancelled | released when an operator operates handle | steering-wheel 5d and rotates the rotation member 5a to rotation direction R2. In this case as well, hammering is not required, so that the work efficiency can be improved and damage to the casing CS can be suppressed.

  Furthermore, according to this embodiment, since the cylinder and the hydraulic unit are not used for holding the casing CS, the manufacturing cost of the casing holder 1 can be suppressed.

  The details of the non-slip 9 will be described with reference to FIGS. 4 and 5. Fig.5 (a) is an expanded view which shows the surrounding surface 11 of the rotation member 5a. As shown in FIGS. 4A and 5A, the non-slip 9 is formed on a part of the peripheral surface 11 of the rotating member 5a (in the present embodiment, approximately 1/3 of the peripheral surface 11). The Specifically, the anti-slip 9 is formed in at least a region of the peripheral surface 11 of the rotation member 5a that protrudes toward the opening 3a by the rotation of the rotation member 5a. The non-slip 9 includes a tooth row 9a having a sawtooth shape in cross section. The tooth row 9a is composed of a plurality of teeth 9b. As shown in FIG. 5A, each of the plurality of teeth 9b of the non-slip 9 is curved in an arc shape in the rotation direction R1.

  FIG.5 (b) is a side view which shows the non-slip 9 of the rotation member 5a. When each rotating member 5a of the holding portion 5 moves to the protruding position, the anti-slip 9 of the rotating member 5a comes into contact with the side surface of the casing CS inserted into the opening 3a (FIG. 2). Therefore, the casing CS is difficult to slip at the contact position between the rotating member 5a and the casing CS. As a result, the casing CS is stably (tightly) held by the four rotating members 5a.

  Further, the rotation member 5a located at the protruding position protrudes more toward the opening 3a as the rotation member 5a rotates in the rotation direction R1. Therefore, when a force acts in the rotation direction R1 of the rotation member 5a due to the weight of the casing CS, the casing CS is further tightened by the four rotation members 5a and is more stably (tightly) held.

  Further, the teeth 9b are curved in an arc shape toward the direction of gravity at the contact position between the casing CS and the teeth 9b (FIG. 5A). Therefore, the rotation of the rotation member 5a in the rotation direction R1 due to the weight of the casing CS is effectively performed, and the casing CS is more stably (tightly) held.

  Next, a casing holding method (structure holding method) using the casing holder 1 will be described with reference to FIG. FIG. 6A to FIG. 6D are procedural diagrams showing a casing holding method according to the embodiment of the present invention.

  As shown in FIG. 6A, in step S1, the casing holder 1 is installed so that the opening 3a of the casing holder 1 overlaps the hole BH. The diameter D1 of the opening 3a is larger than the diameter D2 of the hole BH.

  In addition, in Fig.6 (a), the rotation member 5a protrudes most to the opening 3a side. That is, the distance K1 between the shaft portion 5b and the protrusion of the rotating member 5a is the maximum. The projecting point of the rotating member 5a is the same as the projecting point P described with reference to FIG. Since the distance K1 is the maximum, the distance L1 between the rotating member 5a and the rotating member 5a facing each other is the minimum. In step S1, the position of the rotation member 5a may be a retracted position or a protruding position.

  As shown in FIG. 6B, in step S2, the turning member 5a is turned in the turning direction R2, and the turning member 5a is retracted outside the edge 3b of the opening 3a. That is, the rotating member 5a is moved to the retracted position. Procedure S2 is performed with respect to all the rotation members 5a. The procedure S2 is not executed when the rotating member 5a is located at the retracted position when the procedure S1 is executed.

  In FIG. 6B, the rotating member 5a is positioned at the reference position, but the rotating member 5a may be moved to a retracted position other than the reference position. For example, the rotating member 5a may be moved to the initial position. Further, since the rotating member 5a is located at the retracted position, the distance K2 between the shaft portion 5b and the protrusion of the rotating member 5a is smaller than the distance K1. Therefore, the distance L2 between the rotating member 5a and the rotating member 5a facing each other is larger than the distance L1.

  As shown in FIG. 6C, in step S3, the casing CS is inserted into the space surrounded by the four rotating members 5a of the casing holder 1 and the opening 3a. The outer diameter D3 of the casing CS is smaller than each of the distance L2 and the diameter D1 of the opening 3a. Therefore, the casing CS can be easily inserted into the space surrounded by the four rotating members 5a and the opening 3a.

  As shown in FIG. 6D, in step S4, the rotation member 5a is rotated in the rotation direction R2, and the rotation member 5a is brought into contact with the casing CS. Specifically, the non-slip 9 (FIG. 5) of the rotating member 5a is brought into contact with the side surface of the casing CS. Procedure S4 is performed with respect to all the rotation members 5a. As a result, the casing CS is held by the four rotating members 5a.

  In step S4, since the rotating member 5a is located at the protruding position, the distance K3 between the shaft portion 5b and the protruding point of the rotating member 5a is larger than the distance K2. Therefore, the distance L3 between the rotating member 5a and the rotating member 5a facing each other is smaller than the distance L2. Further, since the rotating member 5a is in contact with the casing CS, the distance L3 is substantially the same as the outer diameter D3 of the casing CS.

  After step S4, steps S5 to S9 are executed as necessary (not shown). In step S5, another casing CS is connected to the casing CS. In step S6, the connected casing CS is held by a crane. In step S7, the rotation member 5a is rotated in the rotation direction R2 and retracted outside the edge 3b of the opening 3a. That is, the holding of the casing CS by the rotating member 5a is released. Step S7 is executed for all the rotating members 5a. As a result, the connected casing CS is suspended by the crane.

  In step S8, the connected casing CS is lowered by the crane. In step S9, as in step S4, the rotation member 5a is rotated in the rotation direction R1 and brought into contact with the casing CS. Procedure S9 is performed with respect to all the rotation members 5a. As a result, the casing CS is held by the four rotating members 5a. Thereafter, procedure S5 to procedure S9 are repeated as necessary.

  As described above with reference to FIG. 6, according to the casing holding method according to the present embodiment, since the casing holder 1 is used, the efficiency of the operation of holding the casing CS is improved, and the casing CS is improved. Can prevent damage.

  The embodiments of the present invention have been described above with reference to the drawings. However, the present invention is not limited to the above-described embodiment, and can be implemented in various modes without departing from the gist thereof (for example, (1) to (5) shown below). In order to facilitate understanding, the drawings schematically show each component as a main component, and the thickness, length, number, and the like of each component shown in the drawings are different from the actual for convenience of drawing. In some cases. Moreover, the shape, dimension, etc. of each component shown by said embodiment are an example, Comprising: It does not specifically limit, A various change is possible in the range which does not deviate substantially from the effect of this invention.

  (1) In the present embodiment, four holding units 5 are provided, but the number of holding units 5 is not limited to four. For example, one holding unit 5 may be provided, or a plurality of holding units 5 other than 4 may be provided.

  (2) The rotating member 5a is not limited to a cylindrical shape. For example, the rotation member 5a has a polygonal column shape, a disc cam shape, or an oval shape in cross section. The disc cam shape is, for example, an oval shape in sectional view, and is a shape in which the distance from the center to the circumference is not constant.

  (3) In this embodiment, the non-slip 9 is formed by the tooth row 9a, but the non-slip 9 is not limited to the tooth row 9a. For example, the non-slip 9 may be formed by a plurality of irregularities, may be formed by a plurality of grooves, or may be formed by a material having a smaller friction coefficient than the casing CS. The anti-slip 9 may not be provided.

  (4) The shape of the frame 3 is arbitrary, and the opening 3a of the frame 3 is not limited to a circle. For example, the opening 3a of the frame 3 is a polygon. In the present embodiment, the shaft portion 5b is loosely inserted into the through hole 5f, but a bearing may be disposed in the through hole 5f and the shaft portion 5b may be inserted into the bearing. Alternatively, a through hole may be formed in the rotating member 5a, the shaft portion 5b may be loosely inserted into the through hole, and the shaft portion 5b may be fixed to the support portion 5c. In this case, a bearing may be disposed in the through hole of the rotating member 5a, and the shaft portion 5b may be inserted into the bearing.

  (5) The casing holder 1 and the casing holding method according to the present embodiment can be applied, for example, when holding the casing in the all casing method.

  The present invention provides a structure holder and a structure holding method for holding a structure inserted into a hole formed in the ground, and has industrial applicability.

1 Casing holder (structure holder)
3 Frame 3a Opening 3b Edge 5 Holding part 5a Rotating member (rotating part)
5b Shaft portion 5c Support portion 5d Handle 9 Non-slip 9a Teeth row 9b Teeth 11 Circumferential surface CS casing (structure)
BH hole GR ground R1 rotation direction (first rotation direction, predetermined rotation direction)
R2 rotation direction (second rotation direction)

Claims (8)

A structure holder for holding a structure to be inserted into a hole formed in the ground,
A frame having an opening for inserting the structure;
And at least one holding portion that is provided on the frame and holds the structure,
The holding part is
The shaft,
A pair of support portions for supporting the shaft portion;
And a pivoting part that pivots around the shaft part and projects to the opening side from the edge of the opening.   The structure holder according to claim 1, wherein a distance between the shaft portion and the peripheral surface of the rotating portion varies depending on a position on the peripheral surface of the rotating portion. The rotating portion is cylindrical.
The structure holder according to claim 1, wherein the shaft portion is provided eccentrically with respect to a center line of the rotating portion.   The anti-slip | skid is formed in the area | region which protrudes in the said opening side by rotation of the said rotation part among the surrounding surfaces of the said rotation part. Structure holder. The rotating part protrudes toward the opening by rotating in a predetermined rotating direction,
The non-slip includes a tooth-like dentition in cross-sectional view,
5. The structure holder according to claim 4, wherein each of a plurality of teeth constituting the tooth row is curved in an arc shape toward the predetermined rotation direction.   The structure holder according to any one of claims 1 to 5, wherein the holding portion further includes a handle formed at a predetermined position on a peripheral surface of the rotating portion.   The structure holder according to any one of claims 1 to 6, wherein a plurality of the holding portions are provided. A structure holding method using a structure holder for holding a structure to be inserted into a hole formed in the ground,
The structure holder is
A frame having an opening for inserting the structure;
And at least one holding portion that is provided on the frame and holds the structure,
The holding part is
The shaft,
A pair of support portions for supporting the shaft portion;
A pivot part that pivots about the shaft part to project to the opening side from the edge of the opening,
A procedure of rotating the rotating part in a second rotating direction opposite to the first rotating direction, and retracting the rotating part outside the edge of the opening;
Inserting the structure into the opening of the frame;
A structure holding method, comprising: rotating the rotating part in the first rotating direction to bring the rotating part into contact with the structure.

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