JP2009185553A - Pressure receiving device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a user-friendly pressure receiving device, which can simply and accurately absorb a gap made between a ground side and an anchor member side by ground subsidence etc., without reference to the size of the gap, and which can eliminate or reduce an unnecessary surplus-length portion produced in installation and protruded above an anchor member. <P>SOLUTION: A first engaging member installed on the side of the anchor member 1, and a second engaging member installed on the side of a bearing plate 3 are engaged with each other in a state in which the second engaging member can move in a phased manner only in a downward direction. An elastic means 16 is interposed between the second engaging member and a stopper portion provided on the side of a fastening nut 17, so as to urge the second engaging member in such a manner as to absorb the gap between the side of the ground 2 and the side of the anchor member 1. In a state in which one end of an extension member 19 is screwed to the head of the anchor member 1, the extension member 19 is detached after screwing position is shifted to the side of the anchor member 1 while the elastic means 16 is compressed by the nut 17. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a pressure receiving device for an anchor used for stabilizing a slope such as a natural ground. That is, the present invention relates to a pressure receiving device for an anchor that transmits a tensile force acting on an anchor member composed of an anchor member using a lock bolt, a PC steel wire, a PC steel wire, a deformed PC steel rod, or the like to the ground side. In particular, it is possible to absorb a gap generated between the ground side and the anchor member constituting the pressure receiving device, such as between a bearing plate on the ground and a tightening nut screwed to the anchor member due to ground subsidence. The present invention relates to an improved pressure receiving device.

In this type of pressure receiving device, an elastic means such as a coil spring is interposed between a nut and a bearing plate screwed to a male screw formed on the outer peripheral surface of the anchor member so as to press the bearing plate to the ground side. What was comprised in this is known (patent document 1). However, in the case of this prior art, when the ground side sinks due to some reason such as snow melting, the supporting plate descends by the urging force of the elastic means, and the gap between the ground side and the anchor member side follows. Although effective in suppressing the occurrence, the urging force of the elastic means decreases as the bearing plate descends, and the drag against the upward movement on the ground side is weakened, and the collapse of the slope is accurately performed. There was also a fear that it could not be stopped.
Japanese Patent No. 3516091

Then, while configuring to press the bearing plate to the ground side by interposing an elastic means such as a disc spring between the nut and the bearing plate screwed to the male screw formed on the outer peripheral surface of the anchor member head, Separately, another nut is provided on the upper part of the bearing plate, and the nut is always urged to rotate downward by a spring, etc., so that a gap generated between the ground side and the anchor member side is always maintained. It is constructed so that it can absorb, and it is constructed so that a strong drag against the upward movement of the ground can be secured by receiving the upward movement of the ground side directly by the anchor member via the nut. That has been developed (Cited document 2). However, in the case of this prior art, a nut for preventing the upward movement of the bearing plate is installed separately from the tightening nut and the gap absorbing elastic mechanism, and the mainspring spring is attached to the nut. Since it must be installed in a wound state, the structure is complicated, and there is a great difficulty in installation space and installation work. In addition, due to the structure of the mainspring spring, there are problems of functional deterioration due to corrosion caused by the use of thin spring materials, and technical problems such as how to counteract the reaction force of the spring's rotational biasing force acting on the bearing plate. there were. Furthermore, the rotation angle of the nut also increases to accommodate the assumed gap size, a large spring spring is required, and rusting of the screwed part of the nut is always prevented. There is also a troublesome problem in maintaining the operation that an accurate operation cannot be obtained without it.
JP 2002-339356 A

  In view of the above-described conventional technical situation, the present invention can easily and accurately absorb the gap generated between the ground side and the anchor member side regardless of the size of the gap, and also occurs during installation. It is an object of the present invention to provide a pressure receiving device that is very easy to use and can remove or reduce an unnecessary extra length protruding above an anchor member.

  In order to solve the above-mentioned problems, the invention of claim 1 includes a first engagement member installed on the anchor member side and a second engagement member installed on the bearing plate side, and these first engagement members. And the second engagement member are engaged with each other in a state in which the second engagement member can be moved only stepwise downward, and the second engagement member and a receiving portion provided on the tightening nut side The elastic means is interposed between the elastic member and the second engaging member is moved downward stepwise by the urging force of the elastic means to absorb the gap generated between the ground side and the anchor member side. And an extension member having a threaded portion that can be screwed to the head of the anchor member at one end, and an external thread formed on the outer peripheral surface similar to the external thread formed on the outer peripheral surface of the anchor member, In a state where one end of the extension member is screwed to the head of the anchor member, the While the door compresses the resilient means and the engaged position on which is shifted to the anchor member, employing the technical means of removing the extension member. Regarding the screwing means of the extension member to the anchor member, a female screw is formed on the upper end surface of the anchor member, and a male screw that can be screwed to the female screw is formed on one end of the extension member and screwed. Alternatively, a tapping screw may be used in place of the male screw, and a female screw is formed at the end of the anchor member by the tapping screw, and one end of the extension member is screwed to the anchor member. (Claim 2). Incidentally, the tapping screw may have any form as long as it can be screwed while forming the screw itself.

  According to a third aspect of the present invention, a first engagement member installed on the anchor member side and a second engagement member installed on the bearing plate side are provided, and the first engagement member and the second engagement are provided. The second engagement member is engaged with the member so that the second engagement member can move stepwise only downward, and elastic between the second engagement member and the receiving portion provided on the nut for tightening. And the second engaging member is moved downward stepwise by the biasing force of the elastic means to absorb the gap generated between the ground side and the anchor member side, and the anchor member A connecting member having a female screw that can be screwed into a male screw formed on the outer peripheral surface of the head, a male member that can be screwed into the female screw formed on the nut on the outer peripheral surface, and the connecting member on one end A threaded portion that can be screwed into an extension female screw formed on the outer peripheral surface. An extension member formed with a male screw similar to the male screw formed on the outer peripheral surface of the member, and one end of the extension member is attached to the female screw for extension of the connecting member screwed to the head of the anchor member In the screwed state, the technical means is adopted in which the nut is compressed while the elastic means is compressed and the screwing position is shifted to the connecting member side, and then the extension member is removed.

According to the present invention, the following effects can be obtained.
(1) Since there is no particular restriction on the setting of the downward movement amount of the second engagement member, and it can be set freely, the gap between the ground side and the anchor member side is possible regardless of the size of the gap. Can be easily and accurately absorbed.
(2) When installing the pressure receiving device, the extension member is used to tighten the elastic means while compressing it with a tightening nut, and after the tightening operation is completed, the extension member is removed and removed. Therefore, the unnecessary extra length portion of the anchor member protruding upward in the installed state can be removed or reduced.

  INDUSTRIAL APPLICABILITY The present invention is used for stabilization of slopes of natural grounds and the like, and acts on an anchor member composed of a rock bolt, a PC steel wire, a PC steel strand, an uncurtain dong using a deformed PC steel rod, or the like It can be widely applied as a pressure receiving device for an anchor that transmits a tensile force to the ground side. The driving force for moving the second engagement member installed on the bearing plate side downward in a stepwise manner relative to the first engagement member installed on the anchor member side is due to elastic means such as a coil spring. I just need it. Incidentally, as in the following embodiment, the cross-section of the engagement surface of the first engagement member and the second engagement member is formed in a sawtooth shape composed of an inclined surface and a lateral locking surface connected to the inclined surface. If the formed engagement form is adopted, the first engagement member and the second engagement member are strongly opposed to the upward relative movement of the ground in a state where the first engagement member and the second engagement member are bitten like a wedge. In addition, the restraining force in the radial direction of the engagement mechanism can be reduced. The first engaging member is installed in a state where a force acting on the first engaging member can be transmitted to the anchor member side by screwing with a male screw formed on the outer peripheral surface of the head of the anchor member. If it is. The nut for tightening may be any one that can compress the elastic means, and is not limited to a specific outer shape such as a spanner hook. Incidentally, in the case of the inventions of the first and second aspects, the tightening nut is configured to be directly screwed to the male screw formed on the outer peripheral surface of the head of the anchor member, In the case of the invention of claim 3, the anchor member is configured to be screwed to the male screw on the outer peripheral surface of the connecting member screwed to the male screw formed on the outer peripheral surface of the head of the anchor member.

  FIG. 1 is an exploded view showing an embodiment of the present invention. 2 to 6 are parts explanatory views showing the parts in an enlarged manner. In the figure, reference numeral 1 denotes an anchor member which is embedded in a state of being fixed to the ground 2 and is installed in a state where the head protrudes upward through an insertion portion formed in the bearing plate 3 as shown in FIG. The In this case, the protruding length of the anchor member 1 is set so as to remove or reduce the extra length unnecessary for the function as the pressure receiving device. From the first engaging member 4 installed on the anchor member 1 side and the second engaging member 5 installed on the bearing plate 3 side with respect to the head of the anchor member 1 protruding upward from the bearing plate 3. The constructed engaging mechanism assembly 6 is mounted. The first engaging member 4 has a female screw 8 that can be screwed to a male screw 7 formed on the outer peripheral surface of the head of the anchor member 1 on the inner peripheral surface, as shown in a component explanatory view shown in a one-side cross section of FIG. A serrated engagement surface 9 is formed on the outer peripheral surface. The sawtooth engagement surface 9 is composed of an inclined surface and a lateral locking surface connected to the inclined surface. Furthermore, in this embodiment, a spanner hooking portion 10 made of a hexagon is formed at the upper end portion of the first engaging member 4 as shown in FIG. As for the male screw 7 formed on the anchor member 1, it is sufficient that it is formed at least on the outer peripheral surface of the head of the anchor member 1. Even if it is formed with respect to the entire length of the anchor member 1, it is partially formed. But you can.

  FIG. 4 to FIG. 6 are parts explanatory views showing the second engaging member 5 in an enlarged manner. FIG. 4 shows the inner peripheral surface of the second engaging member 5, FIG. 5 shows the outer peripheral surface, and FIG. Is shown. As shown in the figure, the second engagement member 5 has a serrated engagement surface 11 having an inclined surface and a locking surface similar to the engagement surface 9 of the first engagement member 4 on the inner peripheral surface. It is formed and is configured to engage with the engaging surface 9 of the first engaging member 4 and move only stepwise downward. As shown in the plan view of FIG. 6, the second engagement member 5 of the present embodiment shows a case where the second engagement member 5 is vertically divided into three arcs. An appropriate number of grooves 12 are formed on the outer peripheral surface of the second engaging member 5 and are configured so as to expand and contract in the radial direction by fitting the elastically deformable ring 13 shown in FIG. Yes. Further, a horizontal portion 14 is formed in the lower portion of the second engaging member 5, and the lower surface thereof is configured to be able to abut on the bearing plate 3, and a ring-shaped recess 15 is formed on the upper surface side of the horizontal portion 14. In this embodiment, the lower end portion of the elastic means 16 made of a coil spring can be fitted and supported.

  Next, how to install the pressure receiving device according to the present embodiment will be described. First, the engagement mechanism assembly 6 is mounted on the head of the anchor member 1 protruding upward from the bearing plate 3. In this case, as shown in FIG. 7, each of the second engagement members 5 divided into three is engaged with the outer peripheral surface of the first engagement member 4 with the respective engagement surfaces 9 and 11. The engagement mechanism assembly 6 shown in FIG. 8 is formed by fitting the ring 13 in each groove portion 12 and maintaining the restraint. Thereafter, a female screw 8 formed on the inner peripheral surface of the first engaging member 4 is screwed into a male screw 7 formed on the outer peripheral surface of the head of the anchor member 1, and the engaging mechanism assembly 6 is thus fixed. Attach to the position. In the above description, the case where the engaging mechanism assembly 6 is assembled in advance and then mounted on the head of the anchor member 1 has been described. However, each of the outer peripheral surfaces of the first engaging member 4 is divided into three parts. A configuration in which the second engagement member 5 is directly mounted and restrained by the ring 13 is also possible.

  When the engagement mechanism assembly 6 is attached to the head of the anchor member 1, as shown in FIG. 1, an elastic means comprising a coil spring along the outer peripheral surface of the second engagement member 5. 16 is externally fitted, and the lower end portion of the elastic means 16 is fitted and supported in a ring-shaped recess 15 formed on the upper surface side of the horizontal portion 14 of the second engagement member 5. Furthermore, the upper end of the elastic means 16 is fitted and supported in a recess 18 formed on the lower surface side of the tightening nut 17, and the nut 17 is attached to the male screw 7 formed on the outer peripheral surface of the head of the anchor member 1. The elastic means 16 is tightened by screwing. The recesses 15 and 18 may be left flat without being provided. FIG. 10 is an explanatory view showing problems relating to the tightening mechanism of the elastic means 16 before improvement. In the figure, the right half shows the state before tightening, and the left half shows the state after tightening. As shown in the figure, in the case before this improvement, in the installed state after tightening shown in the left half, the extra length portion L of the anchor member 1 which is unnecessary in terms of the function as the pressure receiving device protrudes above the nut 17. There was a problem that.

  In the present embodiment, the extension member 19 shown in FIG. 11 is used to improve the extra length L so that it can be removed or reduced. As shown in the figure, the extension member 19 has a male screw 20 similar to the male screw 7 formed on the outer peripheral portion of the anchor member 1 on the outer peripheral portion of the intermediate portion, and a screwed portion including a tapping screw 21 on one end. In addition, the other end is provided with a spanner hanging portion 22 made of a hexagon or the like. 12 to 15 are process explanatory views showing the procedure of the tightening operation of the elastic means 16 using the extension member 19. First, in the process shown in FIG. 12, in the state where the engaging mechanism assembly 6 is mounted on the outer peripheral portion of the head of the anchor member 1 protruding upward from the bearing plate 3, the outer peripheral surface includes a coil spring or the like. Before and after the external fitting operation of the elastic means 16, the extension member 19 is screwed to the upper end portion of the anchor member 1 while forming a screw with a tapping screw 21. In this case, a hollow member may be used as the anchor member 1, or a pilot hole may be formed in advance on the upper end portion of the solid anchor member. Next, as shown in FIGS. 13 and 14, the nut 17 is screwed into the extension member 19 screwed to the upper end portion of the anchor member 1, and the elastic member 16 is compressed while the elastic member 16 is compressed. Tighten until male thread 7 is engaged. When the screwing position of the nut 17 shifts to the male screw 7 of the anchor member 1 and the elastic means 16 is compressed to the initial state, the extension member 19 is removed and removed as shown in FIG. . As a result, as shown in FIG. 16, an installation state in which the anchor member 1 does not protrude above the nut 17 or an installation state in which an unnecessary extra length portion is reduced is obtained. Incidentally, it goes without saying that the protruding length of the anchor member 1 from the bearing plate 3 is set in advance according to the intended installation state as described above.

  FIG. 17 is an explanatory view of the installation state showing a comparison between the initial installation state and the installation state when the ground 2 sinks. Thus, when the ground 2 side sinks for some reason from the initial installation state, the second engagement member 5 against the first engagement member 4 as shown in the right half by the urging force of the elastic means 16. Thus, the gap generated between the ground 2 and the ground 2 is absorbed in steps. FIG. 18 is an explanatory view of an installation state showing another installation form. In the case of this installation form, the case where the head of the anchor member 1 protruding upward through the insertion hole formed in the bearing plate 3 as shown in the drawing is inclined with respect to the ground 2 is shown. . In the figure, reference numeral 23 denotes a disk-shaped spacer whose upper and lower surfaces are relatively inclined. Needless to say, the extension member 19 can be applied to the inclined installation form.

  19 to 22 are enlarged views showing cases where other types of extending members are used. In the present embodiment, the connecting member 24 shown in FIG. 19 and the extending member 25 shown in FIG. 20 are used. As shown in the figure, the connecting member 24 is formed of a short cylindrical hollow body, and an internal thread 26 that can be screwed into a male thread 7 formed on the outer peripheral surface of the anchor member 1 and an appropriate extension for the inner peripheral surface. A female screw 27 is formed, and a male screw 29 that can be screwed into a female screw of a tightening nut 28 is formed on the outer peripheral surface. The extension member 25 is formed with a male screw 30 that can be screwed into a female screw of a nut 28 similar to the male screw 29 formed on the connecting member 24 on the outer peripheral portion of the intermediate portion. A threaded portion made of a male screw 31 that can be screwed into the formed female screw 27 for extension is provided, and a spanner hanging portion 32 made of a hexagon or the like is provided at the other end.

  When the pressure receiving device is installed using the extension member 25 according to the present embodiment, first, as shown in FIG. 21, the connecting member 24 is screwed into the upper end portion of the anchor member 1. Installing. Thereafter, the male screw 31 is screwed into an extension female screw 27 formed on the connecting member 24, and the extension member 25 is screwed. Then, the nut 28 is screwed into a male screw 30 formed on the outer peripheral surface of the extension member 25, and further, the elastic means 16 is compressed on the outer peripheral surface of the connecting member 24 as shown in FIG. Tighten to the position where the formed male screw 29 is screwed. When the screwing position of the nut 28 is shifted to the male screw 29 side of the connecting member 24 and the elastic means 16 is compressed to the initial state, the extension member 25 is removed as shown in FIG. Remove. As a result, as shown in the figure, the anchor member 1 can remove the extra length portion protruding upward from the nut 28, or the unnecessary extra length portion can be reduced. It can be installed in the illustrated installation state protruding upward.

1 is an exploded view showing an embodiment of the present invention. It is component explanatory drawing which expanded the 1st engaging member and was shown in the single-sided cross section. It is component explanatory drawing which showed the plane of the 1st engaging member. It is component explanatory drawing which expanded the 2nd engagement member and showed the internal peripheral surface. It is component explanatory drawing which showed the outer peripheral surface of the 2nd engagement member. It is component explanatory drawing which showed the plane of the 2nd engaging member. It is assembly explanatory drawing of the said components. It is an assembly state explanatory view of the parts. It is component explanatory drawing which expanded and showed the ring for restraint. It is explanatory drawing which showed the problem regarding the fastening mechanism of the elastic means before improvement by the one-side cross section. It is component explanatory drawing which showed the extension member used in the Example of this invention. It is process explanatory drawing which showed the fastening procedure of the elastic means in the Example of this invention. It is process explanatory drawing which showed the fastening procedure of the elastic means. It is process explanatory drawing which showed the fastening procedure of the elastic means. It is process explanatory drawing which showed the fastening procedure of the elastic means. It is installation state explanatory drawing which showed the original installation state by the one-side cross section. It is the installation state explanatory drawing which compared and showed the installation state when the initial installation state and the ground sink. It is installation state explanatory drawing which showed the other installation form in the one-side cross section. It is component explanatory drawing which showed the member for connection used in the other Example of this invention. It is component explanatory drawing which showed the extending member used in the Example. It is process explanatory drawing which showed the fastening procedure of the elastic means in the Example. It is process explanatory drawing which showed the fastening procedure of the elastic means in the Example.

Explanation of symbols

  1: anchor member, 2: ground, 3: bearing plate, 4: first engaging member, 5: second engaging member, 6: engaging mechanism assembly, 7: male screw, 8: female screw, 9: engaging Surface: 10: Spanner hanger, 11: Engagement surface, 12: Groove, 13: Ring, 14: Horizontal, 15: Recess, 16: Elastic means, 17: Nut, 18: Recess, 19: Extension member, 20 : Male screw, 21: tapping screw, 22: spanner hook, 23: spacer, 24: connecting member, 25: extension member, 26, 27: female screw, 28: nut, 29-31: male screw, 32: spanner hook

Claims (3)

  A first engagement member installed on the anchor member side and a second engagement member installed on the bearing plate side, and the second engagement member includes the first engagement member and the second engagement member. Engage in a state where it can move stepwise only downward, and an elastic means is interposed between the second engaging member and a receiving portion provided on the tightening nut side, and the elastic means The second engaging member is moved downward stepwise by the urging force to absorb a gap generated between the ground side and the anchor member side, and is screwed at one end with respect to the head of the anchor member. An extension member having an attachable screw part and having a male screw similar to the male screw formed on the outer peripheral surface of the anchor member is provided on the outer peripheral surface, and one end of the extension member is screwed to the head of the anchor member In this state, the nut is screwed into the screwed position while compressing the elastic means. On which was transferred to the anchor member, a pressure receiving apparatus characterized by being configured so as to remove the extension member.   A threaded portion made of a tapping screw is formed at one end of the extension member, and one end of the extension member is screwed to the head of the anchor member while forming an internal thread at the end of the anchor member by the tapping screw. The pressure receiving device according to claim 1, wherein the pressure receiving device is configured as described above.   A first engagement member installed on the anchor member side and a second engagement member installed on the bearing plate side, and the second engagement member includes the first engagement member and the second engagement member. Engage in a state where it can move stepwise only downward, and an elastic means is interposed between the second engaging member and a receiving portion provided on the tightening nut side, and the elastic means The second engaging member is moved downward stepwise by the urging force to absorb a gap generated between the ground side and the anchor member side, and formed on the outer peripheral surface of the head of the anchor member. A connecting member having a female screw that can be screwed to the male screw and having a male screw that can be screwed to the female screw formed on the outer peripheral surface; and an extending female screw formed on the connecting member at one end. It has a threaded portion that can be screwed, and is formed on the outer peripheral surface of the connecting member on the outer peripheral surface. An extension member formed with a male screw similar to the male screw, and in a state where one end of the extension member is screwed to the female screw for extension of the connecting member screwed to the head of the anchor member, A pressure receiving device configured to remove the extension member after the elastic member is compressed and the screwing position is shifted to the connecting member side.

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