JP6156918B2 - Reaction force bar - Google Patents

Description

  The present invention relates to a reaction bar having an engaging portion that engages with a heavy machine at a front end portion and an attaching portion that is attached to a rotary press-fitting device at a rear end portion.

  Conventionally, when using a rotary press-fitting device that press-fits steel pipe piles etc. into the ground, there is a method of connecting the rotary pressure device and a heavy machine such as a crane with a reaction bar in order to receive the reaction force of the construction torque. It has been adopted (see, for example, Patent Documents 1 and 2). By using this reaction force bar, the posture of the rotary press-fitting device is secured, and rotary press-fitting work such as a steel pipe pile can be performed.

JP 2004-19267 A JP 2005-23775 A

  The conventional reaction force bar is assumed to be installed horizontally, that is, the rotary press-fitting device and the heavy machinery are in a horizontal position. In other words, if the rotary press-fitting device and the heavy machinery are arranged with a step, the engagement between the heavy machinery and the engaging portion of the reaction bar that engages with the heavy machinery becomes insufficient, and it is easy to win.

  For this reason, in the construction, it is necessary to devise such that the rotary press-fitting device and the heavy machinery are arranged horizontally, or the steps are made as small as possible. Or, when it is unavoidable to arrange with a step, it is necessary to devise such as producing a reaction force bar suitable for the site, and the cost is heavy.

  In recent years, a method of rotationally press-fitting steel pipe press-in piles has also been adopted, but this method also involves the provision of a rotary press-fitting device at an angle. There is.

  In view of the above circumstances, the present invention is a reaction force bar that can be installed flexibly according to the site even if there is a step between the rotary press-fitting device and the heavy machinery regardless of the posture of the rotary press-fitting device. The purpose is to provide.

The reaction force bar of the present invention that achieves the above object is a reaction force bar having an engagement portion that engages with a heavy machine at a front end portion and an attachment portion that is attached to a rotary press-fitting device at a rear end portion. At least one location between the mounting portion and the mounting portion is provided with a hinge portion that can be connected in a vertically bent posture, and further provided with a rotary joint at least one location between the engaging portion and the mounting portion. Features.

Since the reaction force bar of the present invention includes the hinge portion described above, even when the heavy machinery is placed at a step with respect to the rotary press-fitting device, the reaction force bar is adjusted to the installation site. It is installed in a posture that is bent up and down to enable sufficient engagement with heavy machinery.
In addition, the reaction force bar of the present invention further includes a rotary joint in addition to the hinge portion described above, so that the heavy machinery is placed in a place with a step with respect to the rotary press-fitting device. Even when it is placed in a state of being inclined in the direction of rotation with respect to the axis of the force bar, the engaging portion of the reaction force bar can be reliably engaged with the heavy machinery.

  Here, in the reaction force bar of the present invention, it is preferable that the hinge portion is provided in at least two places near the engagement portion and the attachment portion.

  When the hinge part is provided at two or more places, it can be more reliably engaged with the heavy machinery as compared with the case where there is only one hinge part.

  Here, in the reaction force bar of the present invention, the hinge part may be a hinge part connected so as to be bent, or the hinge part is attached to the engaging part side with the hinge part as a boundary. The hinge part connected to the attitude | position bent freely in the up-down direction may be sufficient as the part side can be separated.

  As described above, the hinge portion may be a hinge portion that is connected between the engagement portion side and the attachment portion side before installation and bends freely, or before the installation, the engagement portion side and the attachment portion may be bent. It may be divided into a side and connected to a bent posture at the time of construction.

  Further, the reaction force bar of the present invention preferably has a nested structure that allows the length of the reaction force bar to be freely adjusted.

  The longer the reaction bar extends in the radial direction perpendicular to the rotation direction of a steel pipe pile or the like that is rotationally press-fitted by the rotary press-fitting device, the lower the reaction force bar can receive the reaction force with a lighter force. However, if the hinge part is bent in the vertical direction, the greater the bending, the shorter the length in the radial direction.

  Therefore, the reaction bar can be adjusted to a length suitable for the site by having a nested structure and allowing the length of the reaction bar to be freely adjusted.

  In the reaction force bar of the present invention, in addition to the first block provided with the engaging portion and the second block provided with the attaching portion, between the first block and the second block, And a plurality of third blocks that can be connected with each other in a vertically bent posture and are sequentially connected between the first block and the second block. It is also a preferred embodiment that the length is adjusted by the number of third blocks connected between the first block and the second block.

  Thus, it is good also as a form which bends in an up-down direction and adjusts length by connecting a block.

  According to the present invention described above, the reaction bar can be installed flexibly according to the site regardless of the position of the rotary press-fitting device and even if there is a step between the rotary press-fitting device and the heavy machinery. Can be provided.

It is the schematic diagram which showed the 1st example of the construction site of the rotary press-in of the steel pipe press-in pile using the rotary press-fitting device. It is the perspective view which showed an example of the conventional reaction force bar. It is the figure which showed the 2nd example of the construction site of the rotary press-in of the steel pipe press-in pile using the rotary press-fitting device. It is the figure which showed the 3rd example of the construction site of the rotary press-in of the steel pipe press-in pile using the rotary press-fitting device. It is a perspective view of the reaction bar of a 1st embodiment of the present invention. It is a disassembled perspective view of the reaction force bar of 1st Embodiment shown in FIG. It is the schematic diagram which showed an example of the construction site when employ | adopting the reaction force bar of 1st Embodiment. It is a perspective view of the reaction force bar of 2nd Embodiment of this invention. It is a perspective view of the reaction force bar of 3rd Embodiment of this invention. It is a perspective view of the reaction force bar of 4th Embodiment of this invention. It is a disassembled perspective view of the reaction force bar of 4th Embodiment shown in FIG. It is the disassembled perspective view which expanded and showed a part of reaction force bar of 4th Embodiment. It is the schematic diagram which showed an example of the construction site when employ | adopting the reaction force bar of 4th Embodiment.

  Hereinafter, problems of the conventional reaction force bar will be described, and then embodiments of the present invention will be described.

  Drawing 1 is a mimetic diagram showing the 1st example of the construction site of rotation press-fitting of a steel pipe press pile using a rotary press-fitting device.

  Here, a state in which the steel pipe press pile 1 is rotationally press-fitted into the ground by the rotary press-fitting device 10 installed on the ground 2 is shown. Here, the crane 20 as a heavy machine is placed at the same height as the rotary press-fitting device 10, and the rotary press-fitting device 10 and the crane 20 are connected by a reaction bar 30 placed horizontally.

  FIG. 2 is a perspective view showing an example of a conventional reaction force bar.

  The reaction bar 30 has an engaging portion 32 that engages with a heavy machine (here, the crane 20) at the tip of one arm 31 that extends linearly, and is rotationally press-fitted into the rear end of the arm 31. There is an attachment portion 33 attached to the apparatus 10 and they are integrally formed.

  In the case of a construction site shown in FIG. 1 where the rotary press-fitting device 10 and the crane 20 are placed at the same height position, the reaction force bar 30 is a horizontal extension of the reaction force bar extending linearly as shown in FIG. Installation is sufficient.

  Drawing 3 is a figure showing the 2nd example of the construction site of rotary press-fitting of a steel pipe press pile using a rotary press-fitting device.

  Here, the crane 20 is placed at a position lowered with a step as compared with the rotary press-fitting device 10 due to restrictions on the construction site.

  In FIG. 3, a reaction force bar 30 extending linearly as shown in FIG. 2 is used. In this case, the engaging portion 31 (see FIG. 2) of the reaction force bar 30 is engaged with the crane 20 at an angle, and the shape of the reaction force receiving portion that engages with the reaction force bar 30 of the crane 20. Depending on the case, the engagement may be insufficient. In the worst case, the engagement is disengaged during the construction, and the reaction bar 30 rotates with the rotary press-fitting device 10, possibly leading to a major accident. For this reason, some device is required, such as eliminating the step between the rotary press-fitting device 10 and the crane 20.

  Drawing 4 is a figure showing the 3rd example of the construction site of rotary press-fitting of a steel pipe press pile using a rotary press-fitting device.

  Here, a state in which the steel pipe press-in pile 1 is press-fitted obliquely into the ground is shown.

  In this case, the rotary press-fitting device 10 is also installed obliquely. Here, a support member that supports the rotary press-fitting device 10 obliquely at this height position is not shown. As shown in FIG. 4, when there is a portion connected to the attachment portion 32 of the reaction force bar 30 at a position lifted from the ground 2 of the rotary press-fitting device 10, the reaction force bar 30 is placed obliquely, As in the case where there is a step shown in FIG. 3, the engagement with the crane 20 may be insufficient.

  Based on the above problems with the conventional reaction force bar shown in FIG. 2, an embodiment of the present invention will be described below.

  FIG. 5 is a perspective view of a reaction force bar according to the first embodiment of the present invention.

  FIG. 6 is an exploded perspective view of the reaction bar of the first embodiment shown in FIG.

  The reaction force bar 40 is connected to an arm 41, an engaging portion 42 that is connected to the tip of the arm 41 by a hinge 44 and engages a heavy machine such as a crane, and a hinge 45 to the rear end of the arm 41. And an attachment portion 43 attached to the rotary press-fitting device.

  The hinge part 44 that connects the arm 41 and the engaging part 42 and the hinge part 45 that connects the arm 41 and the mounting part 43 are both bent in the vertical direction. . As shown in FIG. 6, the reaction bar 40 can be disassembled into an arm 41, an engaging portion 42, and a mounting portion 43, and is connected to a posture bent in the vertical direction by the hinge portions 44 and 45. Is possible. Alternatively, the reaction force bar 40 may be connected in advance so that it cannot be disassembled by the hinge portions 44 and 45 and can be bent. The hinge portions 44 and 45 may be, for example, ones in which a pin is inserted and connected to the hole 411 of the arm 41 and the hole 421 of the engaging portion 42 and the hole 411 of the arm 41 and the hole 431 of the mounting portion 43. The bolts may be inserted and the nuts may be used to prevent the bolts from being removed, and the bolts may be connected by any connecting means or may be connected.

  FIG. 7 is a schematic view illustrating an example of a construction site when the reaction force bar of the first embodiment is employed.

  Here, as in FIG. 3, the crane 20 is placed at a position lowered with respect to the rotary press-fitting device 10.

  Even in such a construction site, the reaction force bar 40 shown in FIG. 5 is adopted here, so that the hinge portions 44 and 45 bend in the vertical direction, and the engagement portion 42 of the reaction force bar 40 is a crane. 20 is engaged with the crane 20 in a horizontal posture at the same height. Therefore, the engaging portion 42 can be sufficiently engaged with the crane 20.

  FIG. 7 illustrates a scene in which the crane 30 is placed at a height position having a step with respect to the rotary press-fitting device 20, but the rotary press-fitting device 10 is inclined with respect to the ground 2 as shown in FIG. 4. The same applies to the installation, and by adopting the reaction force bar 40 of the first embodiment shown in FIG. 5, the engaging portion 42 of the reaction force bar 40 and the crane 20 are in a horizontal posture at the same height. Can be engaged.

  In addition, although the reaction force bar 40 in which the two hinge portions 44 and 45 exist is described here, the hinge portion may be only one location. Even if there is only one hinge portion, it is possible to sufficiently engage the reaction force bar with the heavy machine at most construction sites as compared with the linear reaction force bar 30 as shown in FIG.

  Moreover, the hinge part may exist in three or more places. In this case, not only the step between the rotary press-fitting device 10 and the heavy machinery such as the crane 20 but also the obstacle over the heavy press such as the rotary press-fitting device 20 and the crane 30 is overcome even if there is an obstacle between them. Can be connected.

  FIG. 8 is a perspective view of a reaction force bar according to the second embodiment of the present invention.

  Similar to the reaction force bar 40 of the first embodiment shown in FIG. 5, the reaction force bar 50 includes an arm 51, an engagement portion 52, and an attachment portion 53, and between the arm 51 and the engagement portion 52. A hinge portion 54 is provided, and a hinge portion 55 is provided between the arm 51 and the attachment portion 53. The arm 51, the engaging portion 52, the mounting portion 53, and the two hinge portions 54 and 55 of the reaction force bar 50 are the arm portion 41 and the engaging portion of the reaction force bar 40 of the first embodiment shown in FIG. 42, attachment portion 43, and two hinge portions 44 and 45, respectively. Here, the difference between the reaction bar 50 of the second embodiment shown in FIG. 7 and the reaction bar 40 of the first embodiment shown in FIG. 5 is only the arm 51. Hereinafter, the structure of the arm 51 will be described. Only will be described.

  The arm 51 of the reaction bar 50 according to the second embodiment shown in FIG. 8 includes a first arm 511 connected to the engaging portion 52 by a hinge 54, and a second arm 512 connected to the mounting portion 53 by a hinge 55. Have Here, the first arm 511 is formed in a hollow shape that receives the insertion of the second arm 512. In addition, a hole 511 a penetrating in the lateral direction for connecting to the second arm 512 is formed at the end of the first arm 511 on the second arm 512 side. On the other hand, the second arm 512 is thick enough to be inserted into the first arm 511, and has holes 512a penetrating laterally at a plurality of locations in the longitudinal direction. These second arms 512 are of a length suitable for the site, and up to a position where any one of the plurality of holes 512a of the second arm 512 matches the hole 511a of the first arm 511. It is pulled out from the first arm 511, and a pin is inserted and fixed so as to penetrate through the holes 511a and 512a.

  Thus, the reaction force bar 50 of the present embodiment has a nested structure, and the length of the reaction force bar 50 can be adjusted freely.

  Here, on the principle of leverage, the reaction bar is advantageous in that the longer the radial length L (see FIG. 7) with respect to the rotational axis of the steel pipe pile that is rotationally press-fitted, the light pressure can be received with a light force. It is.

  However, as shown in FIG. 7, in a construction site having a step, the length L is substantially shortened and tends to be easily obtained. Therefore, when a reaction force bar 50 whose length can be freely adjusted as shown in FIG. 8 is adopted, for example, the crane 20 is placed at a position slightly away from the rotary press-fitting device 10, and the reaction force bar whose length is adjusted longer is used. By connecting at 50, a sufficient length can be obtained as the length L in the radial direction.

  FIG. 9 is a perspective view of a reaction bar according to the third embodiment of the present invention.

  The reaction force bar 60 includes an arm 61, an engagement portion 62, and an attachment portion 63. The arm 61, the engaging part 62, and the attaching part 63 of the reaction force bar 60 correspond to the arm 41, the engaging part 42, and the attaching part 43 of the reaction force bar 40 of the first embodiment shown in FIG.

  The reaction bar 60 includes a first block 621 that functions as the engaging portion 62, a second block 631 that functions as the attachment portion 63, and a plurality of third blocks 611 that constitute the arm 61.

  The third block 611 has the shape shown in FIG. 9B, and the first block 621, the second block 631, and the third blocks 611 are detachable up and down. Connected in a posture bent in the direction. In the example shown in FIG. 9A, the arm 61 of the reaction force bar 60 is configured by three third blocks 611 sequentially connected.

  In the case of the reaction force bar 60 of the third embodiment, the hinge parts that bend up and down are formed in four places in the case of FIG. 9A, can cope with the step as shown in FIG. The length of the arm 61 can be adjusted by the number of blocks 611.

  Here, various means such as pin insertion, bolts and nuts can be used as the connection means between the blocks, and the connection means is not limited to a specific connection means.

  FIG. 10 is a perspective view of a reaction bar according to the fourth embodiment of the present invention.

  FIG. 11 is an exploded perspective view of the reaction bar of the fourth embodiment shown in FIG. 5, and FIG. 12 is an exploded perspective view of a part of the reaction bar of the fourth embodiment. .

  Similar to the reaction bar 40 of the first embodiment shown in FIG. 5, the reaction bar 70 includes an arm 71, an engagement part 72, and an attachment part 73. Further, the reaction force bar 70 further includes a rotary joint 74. The arm 71 and the engaging part 72 have the same shapes as the arm 41 and the engaging part 42 of the reaction bar 40 of the first embodiment shown in FIG. 5, and the description thereof is omitted here. The attachment portion 73 in the reaction force bar 70 of the fourth embodiment corresponds to the attachment portion 43 of the reaction force bar 40 of the first embodiment shown in FIG. 5 and is attached to the rotary press-fitting device. The attachment portion 43 of the reaction force bar 40 of the embodiment is directly connected to the arm 41. In contrast, the attachment portion 73 of the reaction force bar 70 of the fourth embodiment is connected to the rotary joint 74. For this reason, this attachment portion 73 is provided with a protruding connecting portion 730. The connecting portion 730 includes a small-diameter arm portion 731 and a large-diameter disk portion 732 at the tip of the arm portion 731.

  The rotary joint 74 includes two joint members 740. The two joint members 740 are combined with each other as shown in FIG. 10, and insertion bolts (not shown) are inserted into four holes 741 respectively. And fixed with nuts. These two joint members 740 have the same shape.

  In FIG. 12, one of the connecting portion 730 provided in the attachment portion 73 and two joint members 740 constituting the rotary joint 74 is shown. However, in FIG. 12, the joint member 740 is shown in a posture in which the surface facing the other joint member 740 faces upward.

  In addition to the four holes 741, the joint member 740 has a receiving portion 742 that receives the connecting portion 730 of the mounting portion 73. The receiving portion 742 includes a small-diameter semi-cylindrical portion 742a and a large-diameter semi-cylindrical portion 742b into which the arm portion 731 and the disc portion 732 of the connecting portion 730 are respectively inserted. The two joint members 740 are fixed to each other in a state where the connecting portion 730 is received by the receiving portions 742 of both the two joint members 740.

  Further, the joint member 740 has a hole 743.

  The hole 743 corresponds to the hole 431 provided in the attachment portion 43 of the reaction force bar 40 of the first embodiment shown in FIG. 5 and is used for connection with the arm 71.

  The reaction bar 70 according to the fourth embodiment includes the rotary joint 74 so that the reaction bar 70 can be rotated between the mounting portion 73 and the arm 71 in the direction in which the reaction bar 70 is twisted.

  FIG. 13 is a schematic diagram illustrating an example of a construction site when the reaction bar of the fourth embodiment illustrated in FIGS. 10 to 12 is employed.

  Here, as in FIG. 7, the crane 20 is placed at a position lowered with respect to the rotary press-fitting device 10. Further, the rotary press-fitting device 10 is placed obliquely in the direction of rotation with respect to the axis of the reaction bar 70 at a position higher than the crane 20.

  The attachment portion 73 of the reaction force bar 70 is inclined because it is attached to the rotary press-fitting device 10 placed obliquely. However, since the reaction force bar 70 is provided with the rotary joint 74, the slant is eliminated, the hinge portions 75 and 76 bend in the vertical direction correctly, and the engagement portion 72 of the reaction force bar 70 is the same as the crane 20. The crane 20 is engaged at a height and in a horizontal posture.

  As described above, according to the reaction force bar 70 of the fourth embodiment, the engaging portion 72 can be sufficiently engaged with the crane 20 even when there is an inclination in addition to the step. .

  In addition, although the engaging part of the shape which spreads bifurcatedly at the end as an engaging part was shown here, the shape of an engaging part is not a divergent form, for example, but a shape which is bifurcated and extends in parallel with each other It may be, and is not limited to a specific shape.

  Also, the mounting portion is not limited to a specific mounting structure, and various mounting structures can be employed according to the structure of the rotational press-fitting device side of the mounting partner.

DESCRIPTION OF SYMBOLS 1 Steel pipe press pile 2 Ground 10 Rotation press apparatus 20 Crane 30,40,50,60,70 Reaction force bar 31,41,51,61,71 Arm 32,42,52,62,72 Engagement part 33,43, 53, 63, 73 Mounting portion 44, 45, 54, 55, 75, 76 Hinge portion 74 Rotary joint 411, 421, 431, 511a, 512a, 741, 743 Hole 511 First arm 512 Second arm 611 Third block 621 First block 631 Second block 730 Connecting portion 731 Arm portion 732 Disc portion 740 Joint member 742 Receiving portion 742a, 742b Semi-cylindrical portion

Claims (6)

In the reaction force bar having an engagement portion that engages with the heavy machinery at the front end portion and an attachment portion that is attached to the rotary press-fitting device at the rear end portion,
At least one location between the engagement portion and the attachment portion is provided with a hinge portion that can be connected in a vertically bent posture , and
A reaction force bar comprising a rotary joint in at least one place between the engagement portion and the attachment portion .   The reaction bar according to claim 1, wherein the hinge portion is provided at at least two locations near the engagement portion and the attachment portion.   The reaction force bar according to claim 1, wherein the hinge portion is a hinge portion that is foldably connected.   The hinge portion is a hinge portion that is separable from the engagement portion side and the attachment portion side with the hinge portion as a boundary and is connected in a vertically bent posture. The reaction force bar according to claim 1 or 2. 5. The reaction force bar according to claim 1, wherein the reaction force bar has a nested structure that allows the length of the reaction force bar to be freely adjusted . In addition to the first block provided with the engagement portion and the second block provided with the attachment portion, the space between the first block, between the second block, and between each other is in the vertical direction. A plurality of third blocks that are sequentially connected between the first block and the second block, and the reaction bar is connected to the first block. reaction bar according to any one of the four claims 1 to characterized in that the length in number of third blocks to be coupled is adjusted between the second block.

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