JP2017193909A - anchor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an anchor capable of blocking penetration of sediment into a case through an advancement window and enabling an expansion wing to advance outward from the case for certain, thereby steadily offering vertical bearing force and extraction resistance force.SOLUTION: An anchor includes a case 1, an expansion wing 2 accommodated in the case 1, and an expanding/opening structure 3 for operating displacement of the expansion wing 2, with an advancement window 4 formed on a pipe wall of the case 1 for guiding advancement of the expansion wing 2. A closing body 28 is provided inside the case 1, the closing body being displaced by sliding between a closed position where the advancement window 4 is closed and an open position where the advancement window 4 is open. The closing body 28 is held at the closed position while the expansion wing 2 is at an accommodated position. While the expansion wing 2 is operated by the expanding/opening structure 3 for displacement to an expanded/open position, the closing body 28 is moved along with the movement of the expansion wing 2 so as to be displaced by sliding to the open position.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an anchor that advances a wing accommodated in a case while being driven into the ground to the outside of the case to improve the vertical support force and the pulling resistance force.

  For example, Patent Document 1 is known as this type of anchor. In the anchor pile of Patent Document 1, a resistance member is housed in a hollow pipe, and insertion hole portions (advancing windows) for guiding the protruding portions (expansion blades) of the resistance member to advance are formed at two locations on the side of the pipe. Has been. The insertion hole portion is provided with a cut in the side surface of the pipe and a part thereof is recessed inside the pipe, and the recessed portion functions as a guide portion. When the engagement end of the push-pull rod is engaged with the coupling portion of the resistance member and the resistance member is pulled up by the push-pull rod, the tip of the projection is bent toward the outside of the pipe while being guided by the guide portion. It protrudes outside the pipe.

  The present applicant has also proposed this type of anchor. The anchor of Patent Document 2 according to the present applicant includes a circular tubular case, a pair of expanded blades accommodated in the case, and an expanded structure for operating the expanded blades. The expansion structure consists of a screw shaft and a movable block that engages with the same axis and is displaced along the axial direction. Both expanded blades advance toward the ground on the opposite peripheral surface of the case. A pair of openings (advancing windows) for guiding are formed. The pair of openings are closed by a sealing body provided on the outer peripheral surface of the case, and by operating the displacing structure of the expanding structure, the wings are displaced to the expanded position while penetrating the sealing body.

Japanese Patent No. 58479777 JP 2014-152444 A

  In the anchor pile of patent document 1, since the insertion hole part is open | released, when an anchor pile is driven into the ground, earth and sand will penetrate | invade in a pipe from an insertion hole part. If earth and sand enter the pipe in this way, when the resistance member is pulled up, the protrusion will be deformed in the pipe due to the resistance of the earth and sand, so the protrusion cannot be properly projected toward the outside of the pipe. The designed vertical support force and pull-out resistance force cannot be exhibited. Further, when a large amount of earth and sand enters and fills the pipe, the resistance member and the push-pull bar cannot be engaged and connected, and the protruding operation of the protrusion becomes difficult.

  In that respect, in the anchor of Patent Document 2, since the opening is closed with the sealing body, when the anchor is driven into the ground, it is possible to prevent earth and sand from entering the case from the opening. However, since the sealing body is provided on the outer peripheral surface of the case, the sealing body may be displaced from the opening due to friction with the earth and sand when the anchor is driven into the ground. When the sealing body is displaced from the opening portion in this way, the opening is exposed, the earth and sand enter the case, and the expanded wing cannot be properly advanced from the advance window, and the designed vertical support force and pull-out resistance. The power cannot be demonstrated. Moreover, it is inevitable that the operating resistance of the spreading structure increases due to earth and sand, and it takes time and labor to install the anchor. In the worst case, the wing expansion may be deformed in the case.

  In the anchor pile of patent document 1 and the anchor of patent document 2, when the wing expansion unit exhibits the vertical support force or the pulling resistance force, the reaction force from the earth and sand is received only by its structural strength. For this reason, when a large reaction force is applied, the blades are easily deformed. In such a case, the designed vertical support force and pull-out resistance force cannot be maintained, and the anchor may sink or float. In addition, since the anchors are driven into the ground and the wings are displaced, there is a problem in that it is not possible to confirm whether or not the wings have advanced properly.

The object of the present invention is to prevent earth and sand from entering the case through the advance window, and to ensure that the expanded wings are advanced out of the case. Therefore, the vertical support force and the pull-out resistance force are always strengthened. It is to provide an anchor that can be demonstrated.
The purpose of the present invention is to stabilize the vertical support force and pull-out resistance as designed over a long period by advancing the blades to an appropriate spread position and further preventing the blades at the spread position from being deformed. It is in providing the anchor which can be exhibited in the state which carried out.
The object of the present invention is to make it easy to visually check whether or not the expanded blade has advanced properly in the process of displacing the expanded blade to the expanded position with the expanded structure. An object of the present invention is to provide an anchor that can improve the efficiency.

  The anchor of the present invention is a displacement operation so that the posture can be displaced between a hollow tubular case 1, a wing 2 accommodated in the case 1, a position where the wing 2 is accommodated, and an expanded position where the wing 2 extends from the case 1 An expansion window 4 for guiding the expansion blade 2 to advance is formed on the tube wall of the case 1. Inside the case 1, a sealing body 28 that is slidably displaceable between a sealing position for sealing the advancing window 4 and an open position for opening the advancing window 4 is provided, and the expanded wing 2 is positioned at the accommodation position. In the state, the sealing body 28 is held at the sealing position. In the process in which the expansion blade 2 is displaced to the expansion position by the expansion structure 3, the sealing body 28 is configured to move along with the movement of the expansion blade 2 and slide to the open position. Features.

  The expansion blade 2 has a connecting arm 10 provided at the base end of the blade body 9 of the expansion blade 2 supported by a connection bolt 24 of the expansion structure 3 so as to be swingable, and the swinging tip of the blade body 9 contacts. Then, the sealing body 28 is slid to the open position. The sealing body 28 has an outer cross-sectional shape that substantially matches the cross-sectional shape of the inner surface of the case 1, and the tip of the wing body 9 is placed on the end face of the sealing body 28 that contacts the swinging tip of the wing body 9. A guide surface 33 is provided for guiding the advance toward the vehicle.

  The expanding structure 3 includes a screw shaft 16 that is rotatably supported by a support plate 19 fixed in the case 1, a movable block 17 that meshes with the screw shaft 16, and an operation head 18 that rotates the screw shaft 16. The blades 2 are swingably supported by connecting bolts 24 attached to the movable block 17. The restriction pin 29 fixed to the sealing body 28 is received by the edge of the advancing window 4, and the sealing body 28 is guided and supported by the case 1 so as to freely slide up and down. The sealing body 28 is urged toward the sealing position via the urging plate 32 by the urging spring 30 attached to the screw shaft 16.

  On the outer surface of the case 1, a support plate 36 that supports the expanded blade 2 at the expanded position is formed to project along the advance path of the blade body 9.

  A slit 12 is formed in the spreader blade 2 to divide the tip of the blade body 9 into a bifurcated shape. The support plate 36 is provided with a hook 37 that engages with the slit 12 and fixes and holds the tip of the blade body 9 in the expanded position.

  The support plate 36 is provided with a copying surface 38 that engages and guides the slit 12 toward the hook 37.

  A check wire 41 is provided on the outer surface of the case 1, one end of which is fixed below the advancing window 4 and the other end is disposed near the upper end of the case 1. The check wire 41 is provided so that the middle portion of the wire 41 crosses the opening surface of the advance window 4 vertically and intersects the advance locus of the blade 2.

  In the anchor of the present invention, the sealing body 28 provided in the case 1 is held at the sealing position in a state where the blade 2 is located at the housing position, and the expansion position of the expansion blade 2 by the expansion structure 3 is maintained. In the course of the displacement operation, the sealing body 28 is configured to be slid and displaced to the open position by being moved along with the blades 2. According to such a structure, since the sealing body 28 is located inside the outer peripheral surface of the case 1, when the anchor is driven into the ground, the sealing body 28 does not move in contact with the earth and sand. . Further, the advancement window 4 is not opened unless the expansion structure 3 is operated, so the advancement window 4 is opened carelessly when the anchor is transported to the installation site or when the anchor is installed. Can be prevented. As described above, according to the present invention, it is possible to prevent the earth and sand from entering the case 1 from the advance window 4 and to reliably advance the blade 2 to the outside of the case 1. The pulling resistance can always be demonstrated firmly. In addition, since the sliding displacement of the sealing body 28 to the open position is performed by the expansion structure 3, it is not necessary to separately operate the sealing body 28, and the expansion structure 3 by the earth and sand that has entered the case 1 is not necessary. Since an increase in operating resistance does not occur, the anchor can be easily installed with little effort.

  The connecting arm 10 of the blade body 9 of the expansion blade 2 is swingably supported by the connection bolt 24 of the expansion structure 3, and the sealing body 28 is slid to the open position by contacting the swinging tip of the blade body 9. It was made to displace. A guide surface 33 that guides the tip of the blade body 9 toward the advancing window 4 is provided on the end surface of the sealing body 28 that comes into contact with the swinging tip of the blade body 9. According to such a configuration, after the sealing body 28 is moved along with the expanded blade 2 and slid to the open position, the expanded blade 2 swings along the guide surface 33 with the connecting bolt 24 as the swing center. However, since the advancing toward the advancing window 4, the wing expansion 2 can be appropriately advanced to an appropriate expanded position. Further, according to the sealing body 28 having an outer cross-sectional shape that substantially matches the inner cross-sectional shape of the case 1, it is possible to eliminate a gap between the inner and outer sealing bodies 28 and the case 1, and earth and sand can be removed from the advancing window 4. Intrusion into the case 1 can be effectively prevented.

  When the sealing body 28 is urged toward the sealing position via the urging plate 32 by the urging spring 30 attached to the screw shaft 16 of the expansion structure 3, an external force in a direction to displace the sealing body 28 to the open position. However, unless the urging force of the urging spring 30 is exceeded, the advancing window 4 is not opened. Therefore, even if earth and sand or other objects come into contact with the sealing body 28, it is possible to more effectively prevent earth and sand from entering the case 1 through the advance window 4. Further, when the regulating pin 29 fixed to the sealing body 28 is received by the edge of the advancing window 4 and the sealing body 28 is guided and supported by the case 1 so as to freely slide up and down, the sealing body 28 rotates around the axis of the case 1. It is possible to prevent the guide surface 33 and the advance window 4 from being out of phase. Further, according to the expansion structure 3 configured to include the screw shaft 16 and the movable block 17, the blade expansion blade 2 can be reliably displaced to the expansion position even with a small torque by the boosting action of the screw.

  When the support plate 36 that supports the expanded blade 2 at the expanded position is formed on the outer surface of the case 1 along the advance path of the blade body 9, the expanded blade 2 exhibits a vertical support force or a pulling resistance force. It is possible to suppress the expansion of the blades 2 due to the reaction force received from the earth and sand. For example, when the blade 2 receives the reaction force and is bent and deformed so that the blade body 9 bends in the vertical direction in the middle, the projected area of the surface orthogonal to the driving direction is reduced, and the vertical support force and the pulling resistance are reduced. Power is reduced. However, by suppressing the deformation of the blades 2 with the support plate 36 and maintaining the projected area, the designed vertical support force and pull-out resistance force can be exhibited in a stable state over a long period of time.

  When the support plate 36 is provided with a hook 37 that engages with the slit 12 at the tip of the wing body 9 and fixes and holds the tip of the wing body 9 in the spread position, the tip of the wing 2 in the spread position moves up and down. In addition, the expanded wing 2 can be supported by the movable block 17 and the hook 37 in a both-sided manner. Therefore, it can support more firmly while suppressing the expansion of the blades 2, and the designed vertical support force and pull-out resistance force can be exhibited in a stable state over a longer period of time.

  If the support plate 36 is provided with a copying surface 38 that engages and guides the slit 12 toward the hook 37, the blade 2 is advanced along the copying surface 38 to the expanded position, and the slit 12 is securely attached to the hook 37. The tip of the wing body 9 can be fixed and held. Therefore, the expanded blade 2 is advanced to an appropriate expanded position, and further, the expanded blade 2 in the expanded position is prevented from being deformed, and the designed vertical support force and pulling resistance force are stabilized for a longer period. Can be demonstrated in the state.

  A check wire 41 is provided on the outer surface of the case 1 with one end fixed below the advancing window 4 and the other end disposed in the vicinity of the upper end of the case 1. The plane was provided so as to cross the surface up and down and intersect the advance trajectory of the expanded wing 2. According to such a configuration, the check wire 41 can be hooked on the tip of the blade body 9 that advances from the advance window 4 toward the expanded position. Since the hooked check wire 41 is pulled into the ground as the wings 2 advance, if the amount of movement of the check wire 41 on the ground is observed, It is possible to easily confirm visually whether or not the company has advanced properly.

It is a vertical front view of the principal part of the anchor which concerns on Example 1 of this invention, and has shown the state when a blade expansion exists in an accommodation position. It is a vertical front view which shows the whole structure of the anchor which concerns on Example 1 of this invention. It is a vertical front view when an expansion blade exists in an expansion position. It is the XX sectional view taken on the line in FIG. It is the YY sectional view taken on the line in FIG. It is a side view which shows the advance window part. It is a cross-sectional plan view when an expansion blade exists in an expansion position. It is explanatory drawing which shows the expansion process of a blade expansion. It is the schematic which shows the use condition of an anchor. It is the vertical front view which shows the whole structure of the anchor which concerns on Example 2 of this invention, and the ZZ sectional drawing in the same figure. It is a vertical front view which shows the whole structure of the anchor which concerns on Example 3 of this invention.

Example 1 FIGS. 1 to 9 show an anchor according to Example 1 of the present invention. Note that front and rear, left and right, and up and down in this embodiment follow the arrows shown in FIG. 2 and FIG. As shown in FIG. 2, the anchor is a pair of left and right configured to be displaceable between the case 1, the housing position accommodated in the case 1, and the expanded position (see FIG. 3) advanced from the case 1. The expansion blades 2 and 2 and the expansion structure 3 for operating both the expansion blades 2 between the housing position and the expansion position are provided. As shown in FIG. 3, the blade 2 in this embodiment is displaced by the spread structure 3 and advances obliquely downward.

  The case 1 is made of a steel pipe (single pipe) for scaffolding (hollow tubular) cut into a predetermined dimension. The steel pipe for scaffolding is obtained by galvanizing a general structural carbon steel pipe having a wall thickness of 1.8 mm and an outer diameter of 48.6 mm as defined by JIS. The dimension is set to 1000 mm. A pair of left and right advancing windows 4, 4 for guiding the pair of expanded wings 2, 2 to advance out of the case 1 is stamped and formed on the left and right peripheral surfaces of the lower tube wall of the case 1 by pressing. . As shown in FIG. 6, the advancement window 4 is formed in an upward arrow feather shape, and the dimension in the front-rear direction is set slightly larger than the dimension in the front-rear width direction of the blade body 9 of the blade expansion 2 described later. Has been. As a result, when the blade 2 is displaced to the expanded position, the guide is advanced while restricting the blade body 9 from moving back and forth at the opening edges before and after the advance window 4. A conical tip head 5 for facilitating driving into the ground is inserted and fixed to the lower end of the case 1.

  As shown in FIG. 9, the anchor is driven into the ground with the upper end portion of the case 1 exposed to the ground using an electric hammer or the like, and then the wings 2 are moved to the spread position by the spread structure 3. Displaced and fixed to the ground. The expansion blade 2 in the expanded position exhibits a vertical support force and a pulling resistance force, and prevents the anchor from sinking or rising. The gantry B in this embodiment is constructed in a truss shape by connecting the steel pipes for scaffolding with a pipe joint, and the column material of the gantry B is fixed to the case 1 with a pipe joint. A solar battery panel P is attached to the gantry B. After fixing the anchor to the ground, the cap seal 6 is fitted into the upper end opening of the case 1 to prevent rainwater or the like from entering the case 1 (see FIG. 3).

  As shown in FIGS. 3 and 5, the blade extension 2 includes a blade body 9 having a V-shaped cross section and a press molding including a pair of front and rear connecting arms 10 and 10 provided at the base end of the blade body 9. It consists of goods. Each connecting arm 10 is formed with an elongated connecting hole 11 for connecting to the expanding structure 3. The whole of the expanded blade 2 is bent in an arch shape in a state where the valley line of the expanded blade 2 is curved in a protruding shape. A slit 12 that divides the tip of the wing body 9 into a bifurcated shape is formed at the tip of the wing body 9 along the valley line. In addition, a tapered surface 13 cut obliquely is formed at both corners of the tip of the wing body 9, thereby reducing the resistance received from the earth and sand when the blade 2 is displaced to the expanded position. Yes. The pair of expanded blades 2 and 2 are made of the same member, and are accommodated in the case 1 with the valley lines of the expanded blades 2 facing each other. In this embodiment, the longitudinal dimension of the wing body 9 is about 28 mm, and the angle between the V-shaped walls is set to 140 degrees.

  As shown in FIG. 3 and FIG. 7, the expanding structure 3 includes a screw shaft 16 disposed at the axial center position of the case 1 and a displacement operation along the axial direction of the screw shaft 16 that meshes with the screw shaft 16. The movable block 17 is provided. The screw shaft 16 is formed of a right-hand threaded cutting bolt, and an operation head 18 formed of a high nut is welded to the upper end of the screw shaft 16. A ring-shaped support plate 19 is provided below the operation head 18, and the support plate 19 is welded and fixed to the inner surface of the case 1 to rotatably support the screw shaft 16. In FIG. 3, reference numeral 20 is a restriction nut fixedly welded to the screw shaft 16, and the vertical movement of the screw shaft 16 is restricted by sandwiching the support plate 19 vertically between the operation head 18 and the restriction nut 20. ing. Washers are provided between the operation head 18 and the support plate 19 and between the regulation nut 20 and the support plate 19, respectively.

  In the center of the movable block 17, there is formed a female screw portion 23 penetrating vertically, and a pair of front and rear connecting bolts 24, 24 for swingably connecting the two expanded blades 2 are screwed to the front and rear surfaces thereof. A pair of screw holes 25 and 25 are formed. The procedure for assembling the wings 2 to the movable block 17 is as follows. First, the wings 2 are arranged opposite to each other on the left and right sides of the movable block 17 and the connecting arms 10 are applied to the front and rear surfaces of the movable block 17. In this state, the screw shaft of the connecting bolt 24 is screwed into the screw hole 25 of the movable block 17 through the connecting hole 11 to connect the pair of blades 2 and 2 to the movable block 17 so as to be swingable. When the expanded blade 2 is in the storage position, as shown in FIGS. 2 and 5, the expanded surface 2 can be stored in a state where the valley surface having a V-shaped cross section is in close contact with the screw shaft 16 and the front and rear edges are close to each other. Therefore, the pair of blades 2 and the expansion structure 3 can be accommodated in the case 1 in a compact manner.

  As shown in FIGS. 1 and 3, a sealing body 28 is provided inside the case 1, and the sealing body 28 has a circular tubular shape (hollow tubular shape) having an outer cross-sectional shape that substantially matches the cross-sectional shape of the inner surface of the case 1. ). The sealing body 28 is guided and supported by the case 1 so as to be freely slidable up and down between a sealing position for sealing the advancing window 4 and an open position for opening the advancing window 4. Specifically, as shown in FIG. 4, a pair of left and right restricting pins 29, 29 made of spring pins are fixed to the left and right rear sides of the peripheral surface of the sealing body 28. By contacting the opening edge on the rear side, the rotation around the axis of the case 1 is restricted. In the sealing position, the restriction pin 29 contacts the upper opening edge of the advancing window 4, and in the open position, the restriction pin 29 contacts the lower opening edge of the advancing window 4. The slide limit is defined (see FIG. 6).

  As described above, according to the sealing body 28 having the outer cross-sectional shape that substantially matches the inner cross-sectional shape of the case 1, it is possible to eliminate a gap between the inner and outer sealing bodies 28 and the case 1, and the earth and sand advance. Intrusion into the case 1 from the window 4 can be effectively prevented. In addition, if the sealing body 28 is guided and supported only in the up-and-down sliding direction, the sealing body 28 can be prevented from rotating around the axis of the case 1 and the phase of the guide surface 33 and the advance window 4 can be prevented from shifting. .

  As shown in FIGS. 1 and 3, an urging spring 30 made of a compression type cylindrical coil spring is mounted on the lower side of the sealing body 28 in a state of being externally fitted to the screw shaft 16 via a gap. The urging spring 30 is compressed and deformed by being received by a ring-shaped urging plate 32 whose upper and lower ends are fitted on the screw shaft 16 and a holding nut 31 screwed into the screw shaft 16. The sealing body 28 supported by 32 is urged to move upward (toward the sealing position). The holding nut 31 is formed of a U nut having a locking function, and washers are provided on the upper and lower ends of the biasing spring 30, respectively. With the above-described configuration, the sealing body 28 receives the urging force of the urging spring 30 and is held at the sealing position to close the advance window 4 in a state where the wing expansion blade 2 is positioned at the housing position.

  As described above, when the sealing body 28 is urged toward the sealing position by the urging spring 30 via the urging plate 32, an external force in a direction to displace the sealing body 28 to the open position is applied. The advancement window 4 will not be opened unless the urging force is exceeded. Therefore, even if earth and sand or other objects come into contact with the sealing body 28, it is possible to more effectively prevent earth and sand from entering the case 1 through the advance window 4. Further, when the urging spring 30 is mounted in a state of being externally fitted to the screw shaft 16, the screw shaft 16 and the urging spring 30 are disposed so as to overlap with each other, and the urging spring 30 is accommodated in the case 1 in a compact manner. Can do.

  As shown in FIG. 1, a pair of inclined surfaces are formed on the upper end surface of the sealing body 28 so as to incline downward from the left and right center of the sealing body 28 toward the left and right. It functions as a pair of left and right guide surfaces 33, 33 that guide the leading end toward the advancing window 4. The expanded blade 2 in the accommodated position is accommodated in the case 1 so that the swinging tip of the blade body 9 is in contact with the guide surface 33 of the sealing body 28, and the sealing body 28 is expanded by the expansion structure 3. In accordance with the displacement operation, the push-down operation is performed by the blades 2, and the slide displacement is performed to the open position against the urging force of the urging spring 30. By bringing the tip of the blade body 9 into contact with the guide surface 33, the rotation of the blade expansion 2 with respect to the screw shaft 16 is restricted, and without providing a separate structure for restricting rotation, The positions around the axis of the screw shaft 16 are maintained so that the phases of the two coincide with each other.

  For example, when the screw shaft 16 is rotated in a direction (clockwise rotation direction) to pull the movable block 17 upward due to vibration during transportation of the anchor or driving of the anchor, the wing expansion unit 2 moves upward along with the movable block 17. The tip of the wing body 9 may be lifted away from the guide surface 33. At this time, since the position of the movable block 17 around the axis of the screw shaft 16 is not restricted with respect to the case 1, the phases of the blade expansion 2 and the advancement window 4 may be shifted. Even in such a case, by rotating the screw shaft 16 in the direction in which the movable block 17 moves downward (counterclockwise direction), the leading end of the blade body 9 is guided by the guide surface 33, and the expanded blade 2, the advance window 4, The expanded blade 2 can be returned to a position where the phases coincide with each other.

  As described above, when the guide surface 33 is provided on the upper end surface of the sealing body 28, the sealing body 28 moves along with the expanded blade 2 and is slid to the open position, and then the expanded blade 2 swings the connecting bolt 24. Since it advances toward the advancing window 4 while swinging along the guide surface 33 as a moving center, it is possible to appropriately advance the blade 2 to an appropriate expanded position. Further, when the blade 2 is advanced from the advance window 4, it is possible to smoothly guide the tip of the blade body 9 by the guide surface 33 inclined downward and prevent the movement of the blade 2 from becoming jerky.

  As shown in FIG. 3, a support plate 36 is formed on the outer surface of the case 1 below the advance window 4 along the advance path of the wing body 9, and the support plate 36 is in the expanded position. It is provided to receive and support the wing 2 from below. The support plate 36 is formed in a horizontally-oriented substantially right-angled isosceles triangle shape, and the side portion on the base end side is fixed to the case 1 by welding so that the plate surface is along the vertical direction. In the expanded wing 2 in the expanded position, the valley portion of the wing body 9 is received and supported by the support plate 36. A hook-like hook 37 that engages with the previous slit 12 and fixes and holds the tip of the blade body 9 in the expanded position is integrally provided at the tip of the support plate 36 upward. The slit 12 is inserted into and engaged with the hook 37, thereby restricting the tip of the wing 2 from moving up and down in the expanded position, and the wing 2 is supported by the movable block 17 and the hook 37. I can support it.

  As described above, when the support plate 36 that supports the expanded wing 2 in the expanded position is provided, the wing body 9 is caused by the reaction force received from the earth and sand when the expanded wing 2 exhibits a vertical support force or a pulling resistance force. It can suppress bending and deform | transforming so that it may bend in an up-down direction. Thereby, it is possible to prevent the projected area of the surface orthogonal to the driving direction of the blades 2 from being reduced, and to exhibit the designed vertical support force and pull-out resistance force in a stable state over a long period of time. In addition, when the tip of the blade body 9 in the expanded position is fixedly held by the hook 37, the blade 2 is supported more firmly while suppressing the deformation of the blade 2, and the designed vertical support force and pull-out resistance force are extended for a long time. Can be demonstrated in a stable state.

  The upper side portion of the support plate 36 is formed in an indented curved shape, and this side portion functions as a copying surface 38 that guides the tip of the blade body 9 of the expanded blade 2 that is in the process of moving forward toward the hook 37. As described above, when the copying surface 38 is provided on the support plate 36, the blade 2 is advanced along the copying surface 38 to the expanded position, and the slit 12 is securely engaged with the hook 37, so that the blade main body 9 can be engaged. The tip of can be fixedly held. Therefore, the expanded blade 2 is advanced to an appropriate expanded position, and further, the expanded blade 2 in the expanded position is prevented from being deformed, and the designed vertical support force and pulling resistance force are stabilized for a longer period. Can be demonstrated in the state. The lower side portion of the support plate 36 is inclined upward from the proximal end toward the distal end side, thereby reducing the resistance of earth and sand acting on the support plate 36 when the anchor is driven into the ground. Further, since the plate surface of the support plate 36 is fixed to the case 1 along the vertical direction, the driving resistance that is increased by the support plate 36 when the anchor is driven is small.

  The anchor of this embodiment is provided with a check wire 41 for confirming whether or not the expanded wing 2 has properly advanced in the ground, and the check wire 41 is provided along the left side of the outer surface of the case 1. ing. The lower end of the check wire 41 is inserted into two tight holes 42 formed in the support plate 36 and fixed in a loop shape with a stopper 43. The length of the check wire 41 is set such that the upper end thereof exceeds the upper end surface of the case 1 in a state where the lower end is fixed, whereby the upper end of the wire 41 is located near the upper end of the case 1. Be placed. The midway part of the check wire 41 is provided so as to cross the opening surface of the advance window 4 vertically and intersect the advance locus of the blade 2.

  According to the check wire 41 as described above, the check wire 41 can be hooked on the claw portion sandwiching the slit 12 at the tip of the blade body 9 that advances from the advance window 4 toward the expanded position, and the check that is caught A portion of the wire 41 on the ground is drawn into the ground as the expanded blade 2 advances. Accordingly, if the amount of movement of the check wire 41 on the ground is observed, it can be easily confirmed visually whether or not the expanded blade 2 has advanced properly. The check wire 41 may be disposed near the center of the opening surface of the advance window 4 so that it can be hooked on the claw portion at the tip of the wing body 9 while entering the slit 12 (see FIG. 6). Thereby, it is possible to prevent the check wire 41 from dropping off from the tip of the wing body 9 during advancement, and the check wire 41 hooked on the slit 12 can be reliably pulled into the ground.

  Here, the assembly procedure of the anchor will be described. First, the restriction nut 20, the support plate 19, and the operation head 18 are assembled to the upper end of the screw shaft 16 with a washer interposed, so that the support plate 19 does not rattle up and down and the screw shaft 16 can rotate. The operation head 18 and the regulation nut 20 are fixed to the screw shaft 16 by welding. Next, the lower end of the screw shaft 16 is screwed into the female screw part 23 so that the tip of the blade main body 9 faces downward, in which the pair of expanded blades 2 are connected to the movable block 17 by the connecting bolt 24 so as to be swingable. At this time, the movable block 17 is screwed to such an extent that the sealing body 28 and the like can be assembled on the lower side. Next, the sealing body 28, the urging plate 32, the urging spring 30, and the holding nut 31 are assembled to the screw shaft 16 with a washer interposed therebetween, and the screw shaft 16 assembled with these members is opened above or below the case 1. The support plate 19 is inserted into the case 1 through the opening and fixed to the upper end of the case 1 by welding. Finally, the screw head 16 is rotated by the operation head 18 to adjust the position so that the peripheral surface of the sealing body 28 faces the advancing window 4, and a pair of regulating pins 29 are driven into the sealing body 28 for assembly. Complete. After that, the operation head 18 is rotated so that the restriction pin 29 contacts the upper opening edge of the advancing window 4, and the tip head 5 is inserted into the lower end of the case 1 to complete the assembly of the anchor.

  Next, the displacement operation of the expansion blade 2 by the expansion structure 3 will be described. The pair of blades 2 and 2 is rotated so that the screw shaft 16 of the spread structure 3 is rotated, so that the blade 2 is advanced from the housing position where the blade 2 is housed in the case 1. Can be displaced to a position. The displacement operation is performed from the upper end of the anchor exposed on the ground using an electric rotary tool equipped with a socket corresponding to the operation head 18.

  When the operation head 18 is rotated counterclockwise with the electric rotary tool from the accommodated position, the movable block 17 is displaced downward, and the two expanded blades 2 maintain their postures accordingly. The sealing body 28 is moved while being slid and displaced downward (FIG. 8A). At this time, the rotation of the blade extension 2 around the axis is restricted by the guide surface 33 of the sealing body 28. When the sealing body 28 is slid to the release position, the two wings 2 move to the advance window 4 while the tip of the wing body 9 swings upward along the guide surface 33 with the connecting bolt 24 as the swing center. Advance toward. Further, by rotating the operation head 18, the tip of the wing body 9 advances along the copying surface 38 of the support plate 36 (FIG. 8B), and the slit 12 of the wing body 9 is inserted into the hook 37. When engaged, the operating head 18 can no longer be operated to rotate, and the two blades 2 are displaced to the expanded position. In the process of expanding the wing 2 out of the case 1 through the advancing window 4, the left wing 2 is advanced while hooking the check wire 41 (FIG. 8B), so that the check wire 41 exposed on the ground is exposed. It is possible to confirm that the wing expansion unit 2 has properly advanced by visually checking the movement state of.

  As described above, the sealing body 28 can be slid to the open position only by performing the displacement operation of the expanding blade 2 by the expanding structure 3, and if the expanding structure 3 is further operated continuously from this state, the case The wing expansion 2 can be advanced outside the 1. Accordingly, the slide can be displaced to the open position of the sealing body 28 and the advance operation to the expansion position of the blade 2 can be performed only by the displacement operation of the expansion structure 3, so that the anchor can be easily installed. Since the expansion structure 3 includes the screw shaft 16 and the movable block 17, the expansion blade 2 can be reliably displaced to the expansion position even with a small torque by the boosting action of the screw.

  Since the anchor of the present embodiment employs the expansion structure 3 configured to include the screw shaft 16 and the movable block 17, both the expansion blades 2 at the expansion position are operated to be displaced to the accommodation position. Is also possible. When the operation head 18 is rotated clockwise with an electric rotary tool from the state of being in the expanded position, the movable block 17 is displaced upward, and the two expanded blades 2 are moved into the case 1 accordingly. And drawn. When both the expanded blades 2 are completely drawn into the case 1, the expanded blade 2 moves upward in the case 1 together with the sealing body 28 that receives the urging force of the urging spring 30. It is displaced to the storage position. As described above, when removing the fixed anchor, the vertical support force and the pulling-out resistance force by the expansion blade 2 can be released by displacing the expansion blade 2 to the accommodation position, so that the anchor is pulled out from the ground. be able to.

(Example 2) FIG. 10 shows an anchor according to Example 2 of the present invention. In this embodiment, a semicircular guide plate 46 is fixed to the pair of inclined surfaces formed on the sealing body 28 in plan view so that the upper surface of the plate 46 functions as the guide surface 33. Further, a restriction pipe 47 is externally attached to the screw shaft 16 above the movable block 17. Furthermore, the shape of the urging spring 30 is changed from a cylindrical shape to a drum shape, and the regulating pin 29 is replaced with a spring pin so that a pierce screw is screwed in and attached. Since others are the same as those of the first embodiment, the same members are denoted by the same reference numerals and the description thereof is omitted. The same applies to the following embodiments.

  As described above, when the upper surface of the guide plate 46 fixed to the inclined surface is caused to function as the guide surface 33, the area can be increased compared to the guide surface 33 of the sealing body 28 in the first embodiment. Can guide the tip of the wing body 9. When the restriction pipe 47 is externally fitted to the screw shaft 16, the restriction pipe 47 prevents the screw shaft 16 between the restriction nut 20 and the movable block 17 from being bent and deformed. The rotation operation can be performed smoothly. Further, the upward movement of the movable block 17 due to the unintended rotation of the screw shaft 16 can be prevented by the restriction pipe 47, and it is possible to restrict the blade expansion 2 from moving greatly from the position at the time of assembly.

(Example 3) FIG. 11 shows an anchor according to Example 3 of the present invention. In the present embodiment, the internal housing members such as the expanded blade 2, the sealing body 28, and the biasing spring 30 with respect to the screw shaft 16 are arranged upside down, and the shape of the advancing window 4 is formed in a downward arrow shape accordingly. did. The support plate 36 was welded and fixed to the upper side of the advancing window 4 while being inverted upside down, and the tip of the hook 37 was extended and fixed to the lower side of the advancing window 4 by welding. A tight hole 42 for the check wire 41 is formed in the extended portion. Thereby, the blade extension 2 in a present Example advances to diagonally upward direction. In the sealing position of the sealing body 28, the regulation pin 29 contacts the lower opening edge of the advance window 4, and in the open position, the regulation pin 29 contacts the upper opening edge of the advance window 4.

  As described above, in the anchor of each of the above embodiments, the sealing body 28 is located on the inner side of the outer peripheral surface of the case 1, and therefore, when the anchor is driven into the ground, the sealing body 28 comes into contact with the earth and sand. Will not move. Further, the advancement window 4 is not opened unless the expansion structure 3 is operated, so the advancement window 4 is opened carelessly when the anchor is transported to the installation site or when the anchor is installed. Can be prevented. As described above, it is possible to prevent the earth and sand from entering the case 1 from the advance window 4 and to surely advance the expanded wing 2 to the outside of the case 1, so that the vertical support force and the pulling resistance force are always strong. Can demonstrate. In addition, since the sliding displacement of the sealing body 28 to the open position is performed by the expansion structure 3, it is not necessary to separately operate the sealing body 28, and the expansion structure 3 by the earth and sand that has entered the case 1 is not necessary. Since an increase in operating resistance does not occur, the anchor can be easily installed with little effort.

  In each of the above embodiments, a circular tube is used as a material for forming the case 1, but a square tube or a polygonal tube can be used. In this case, the axis of the case 1 of the sealing body 28 by the restriction pin 29 is used. It is possible to omit the restriction around the heart. The blades 2 are configured as a pair of left and right, but can be configured by one or three or more. The shape of the wing body 9 is not limited to the shape of each of the above embodiments, and may be any shape that can be accommodated in the case 1 and that can exert a vertical support force and a pulling resistance force when advanced into the ground. The upper and lower dimensions of the case 1 can be freely set to be long or short as long as the constituent members such as the blades 2 are accommodated in the case 1. The vertical dimension may be adjusted by welding and fixing a steel pipe for scaffolding on the upper side of the case 1.

  The expansion structure 3 is composed of a screw shaft 16 and a movable block 17, etc., and a blade expansion support body in which the blade expansion blade 2 is slidably mounted and guided up and down by the case 1, and the blade expansion support body is a case. It can be comprised with the elongate operation body operated from an upper end. The shape of the biasing spring 30 formed of a compression type coil spring may be a conical shape, a barrel shape, or the like. Further, the urging spring 30 may be a torsion spring or a leaf spring in addition to the compression coil type spring. The biasing spring 30 can be omitted. In this case, the sealing member 28 may be held in position by interposing a friction member between the inner surface of the case 1 and the outer surface of the sealing member 28. The check wire 41 is not limited to a stranded metal wire, and can be replaced with a string made of synthetic resin as long as it has sufficient tensile strength. The anchor can be widely applied as a foundation for a temporary house, a construction scaffold, a temporary fence, etc., in addition to the foundation of the mount B on which the solar battery panel P is attached.

DESCRIPTION OF SYMBOLS 1 Case 2 Expanding blade 3 Expanding structure 4 Advancing window 9 Blade body 10 Connecting arm 12 Slit 28 Sealing body 30 Energizing spring 33 Guide surface 36 Support plate 37 Hook 38 Copy surface 41 Check wire

Claims (7)

Position change between a hollow tubular case (1), an expanded wing (2) accommodated in the case (1), a position where the expanded wing (2) is accommodated, and an expanded position where the advancing from the case (1) An anchor having an expanding structure (3) that can be displaced and capable of being moved, and having an advancing window (4) for advancing and guiding the expanded wing (2) on the tube wall of the case (1),
Inside the case (1), there is provided a sealing body (28) slidably displaceable between a sealing position for sealing the advancing window (4) and an open position for opening the advancing window (4). In the state where (2) is positioned at the storage position, the sealing body (28) is held at the sealing position,
In the process in which the expansion blade (2) is displaced by the expansion structure (3) to the expansion position, the sealing body (28) moves along with the movement of the expansion blade (2) and is slid to the open position. An anchor characterized by being configured as follows. The expansion blade (2) is supported by a connection arm (10) provided at the base end of the blade body (9) of the expansion blade (2) so as to be swingable by a connection bolt (24) of the expansion structure (3). The oscillating tip of the wing body (9) comes into contact with the sealing body (28) to slide to the open position,
The sealing body (28) has an outer cross-sectional shape that substantially matches the cross-sectional shape of the inner surface of the case (1), and is attached to the end surface of the sealing body (28) that contacts the swinging tip of the wing body (9). The anchor according to claim 1, further comprising a guide surface (33) for guiding the tip of the main body (9) toward the advancing window (4). The expansion structure (3) includes a screw shaft (16) that is rotatably supported only by a support plate (19) fixed in the case (1), a movable block (17) that meshes with the screw shaft (16), and a screw An operating head (18) for rotating the shaft (16), and the wings (2) are swingably supported by a connecting bolt (24) attached to the movable block (17).
The regulation pin (29) fixed to the sealing body (28) is received by the edge of the advancing window (4), and the sealing body (28) is guided and supported by the case (1) so as to freely slide up and down.
The anchor according to claim 2, wherein the sealing body (28) is urged toward a sealing position via an urging plate (32) by an urging spring (30) attached to the screw shaft (16).   The support plate (36) for supporting the expanded blade (2) in the expanded position is formed on the outer surface of the case (1) so as to project along the advance path of the blade body (9). The anchor as described in any one. A slit (12) that divides the tip of the wing body (9) into a bifurcated shape is formed in the expansion wing (2),
The anchor according to claim 4, wherein the support plate (36) is provided with a hook (37) that engages with the slit (12) and fixes and holds the tip of the blade body (9) in the expanded position.   The anchor according to claim 5, wherein the support plate (36) is provided with a copying surface (38) for engaging and guiding the slit (12) toward the hook (37). A check wire (41) is provided on the outer surface of the case (1), one end of which is fixed below the advancing window (4) and the other end is arranged near the upper end of the case (1).
The check wire (41) is provided such that a middle portion of the wire (41) crosses the opening surface of the advance window (4) vertically and intersects the advance locus of the expanded blade (2). The anchor according to any one of 6 to 6.

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