JP6838823B2 - Post-construction anchor mounting structure - Google Patents

Description

In the present invention, a hardened concrete skeleton is drilled later, and a post-construction anchor is placed in the drilled structure. In particular, a tubular body having a spread piece is driven into a substantially cone-shaped cone to expand the structure. It relates to a post-construction anchor mounting structure in which a post-construction anchor device is used after the main body is driven into an open piece or expanded.

Conventionally, a main body driving type post-construction anchor composed of a tubular main body having a female screw formed in the rear portion and an expansion piece in the front portion and a cone having a substantially frustum-shaped cone is known (Patent Document 1). , 2). In the main body driving type post-construction anchor 100, for example, as shown in FIG. 7A, the tubular main body 110 is driven toward the cone 120 to expand the expanding piece 111 of the main body 110, and the expanding piece 111 is expanded. It is fixed to the concrete skeleton 160 by the expanding force of 111. When the attachment 150 is attached to the post-fixing construction anchor 100, the attachment bolt 130 is screwed onto the female screw 112 of the main body 110 via the washer 140 to attach the attachment.

This type of post-construction anchor has excellent workability because the protruding part of the bolt does not interfere with the work because the bolt does not protrude until the attachment is actually attached. Another advantage is that the post-construction anchor can be attached to the concrete first, and then the attachment bolts of arbitrary length can be attached to the construction anchor after fixing.

Japanese Unexamined Patent Publication No. 2004-263848 JP-A-2004-360198

By the way, in the post-construction anchor of the main body driving type, when the construction is not perfect or the usage environment is harsh and there is a lot of vibration, for example, as shown in FIG. 7B, the cone 120 is placed in the concrete skeleton 160. I am worried that the main body 110 may come off, or that the mounting bolt 130 may loosen into the female screw 112 and the mounting bolt 130 may come out as shown in FIG. 7 (c). May occur and avoid use.

As a device that can deal with such a problem, there is a sleeve driving type male screw type post-construction anchor. FIG. 8A shows an example of a sleeve driving type male screw type post-construction anchor. The sleeve driving type male screw type post-construction anchor 200 has a taper bolt 210 having a tapered portion 211 formed at the front portion and a male screw portion 212 formed at the rear portion, and a sleeve 220 provided with an expansion piece 221 at the front portion. The sleeve 220 is driven toward the tapered portion 211, and the expansion piece 221 is expanded and fixed to the concrete skeleton 250. For example, an attachment 240, a washer 231 and a spring washer 232 are extrapolated to the male threaded portion 212 of the taper bolt 210 protruding from the concrete skeleton 250, and a nut 233 is screwed into the male threaded portion 212 from the outside to form the attachment 240. It is attached. In this sleeve driving type male screw type post-construction anchor 200, as long as the nut 233 is tightened, the taper portion 211 of the taper bolt 210 always urges the expansion piece 221 of the sleeve 2210 to expand. It is possible to prevent the taper bolt 210 and the sleeve 220 from falling off.

However, in the sleeve driving type male screw type post-construction anchor 200, the sleeve 220 is driven into the tapered portion 211 of the taper bolt 210 to expand and fix the expansion piece 221. Therefore, the post-installation anchor is installed. There is a problem that the bolt length cannot be changed later and the flexibility of construction is inferior. Further, in the post-construction anchor 200, since the attachment 240 is attached by the taper bolt 210 in which the taper portion 211 is formed in the front portion and the male screw portion 212 is formed in the rear portion, the length is different when the thickness of the attachment is changed. (See FIG. 8B), but there is also a problem that it is inferior in economic efficiency because it is necessary to prepare expensive taper bolts having a special shape and various lengths.

The present invention has been proposed in view of the above problems, and it is possible to prevent the main body from coming off from the concrete skeleton and loosening the bolts, and it is possible to change the bolt length after the post-construction anchor is placed. It is an object of the present invention to provide a post-construction anchor mounting structure in which a post-construction anchor device having excellent flexibility is used.

The post-construction anchor mounting structure of the present invention includes a tubular main body having an expansion piece at the front portion and a substantially bolt-shaped cone having a female screw formed inside and at least the rear end portion being built into the main body. A mounting bolt that is inserted into the main body and a male screw is screwed onto the female screw of the cone, and is elastically hooked near the tip of the female screw of the cone and near the tip of the male screw of the mounting bolt. It is a post-construction anchor mounting structure in which a post-construction anchor device is provided with a member , and the expansion piece is formed in a state where the cone is inserted into the expansion piece of the main body in a perforation of a concrete skeleton. It is expanded so that the expanded piece is provided so as to bite into the hole wall of the perforation, the mounting bolt is inserted into the main body, the male screw is screwed to the vicinity of the tip of the female screw of the cone, and the elasticity The member is provided so as to be hooked near the tip of the male screw of the mounting bolt, and the mounting bolt is tightened by a nut and pulled toward the surface side of the concrete skeleton.
According to this, the structure in which the elastic member near the tip of the female screw of the cone is hooked near the tip of the male screw of the mounting bolt prevents the main body from coming off from the concrete skeleton and the bolt from loosening by hooking the elastic member. Can be done. In addition, in this structure, after the main body is driven to expand the expansion piece and the main body and cone are installed on the concrete skeleton, in other words, after the main body is driven in, the mounting bolt of the required length is placed after the construction anchor is placed. Can be screwed and attached. That is, it becomes easy to change the bolt length after the post-construction anchor is placed, and the flexibility of construction can be enhanced. In addition, it is not necessary to prepare expensive taper bolts with special shapes in various lengths, which is economical. Further, due to the structure in which the elastic member is located near the tip of the female screw of the cone, smooth screwing of the male screw of the mounting bolt with respect to the female screw of the cone can be ensured. Further, by pulling the mounting bolt screwed to the vicinity of the tip of the female screw of the cone toward the surface side of the concrete skeleton, it is possible to obtain an additional expansion force for the expansion piece and an additional fixing force for the concrete skeleton. Post-construction Anchor fixtures can be more firmly and stably fixed to the concrete skeleton.

The post-construction anchor mounting structure of the present invention is characterized in that a leaf spring that partially protrudes into the female screw hole of the cone is provided as the elastic member of the post-installation anchor device.
According to this, it is possible to obtain an elastic member that has a simple structure and can be hooked on the male screw of the mounting bolt at low cost. In addition, when the thread of the male screw of the mounting bolt is caught in the leaf spring, the tightening torque changes significantly, so that the operator can easily recognize that the predetermined tightening work of the mounting bolt has been performed reliably. It becomes.

The post-construction anchor mounting structure of the present invention includes a tubular main body having an expansion piece at the front portion and a substantially bolt-shaped cone having a female screw formed inside and at least the rear end portion being built into the main body. A mounting bolt that is inserted into the main body and a male screw is screwed onto the female screw of the cone, and is elastically hooked on the tip side of the male screw of the mounting bolt in the vicinity of the tip of the female screw of the cone. It is a post-construction anchor mounting structure in which a post-construction anchor device is provided with a member , and the expansion piece is formed in a state where the cone is inserted into the expansion piece of the main body in a perforation of a concrete skeleton. It is expanded so that the expanded piece is provided so as to bite into the hole wall of the perforation, the mounting bolt is inserted into the main body, the male screw is screwed into the female screw of the cone, and the mounting bolt is said. The elastic member on the tip side of the male screw is provided so as to be hooked near the tip of the female screw on the cone, and the mounting bolt is tightened on a nut and pulled toward the surface side of the concrete skeleton. and said that you are.
According to this, the structure for engaging the resilient member on the distal end side of the mounting bolt external thread near the tip of the cone of the internal thread, to prevent loosening of the exit and bolts of the body from the concrete skeleton with hooking elastic member Can be done. In addition, in this structure, after the main body is driven to expand the expansion piece and the main body and cone are installed on the concrete skeleton, in other words, after the main body is driven in, the mounting bolt of the required length is placed after the construction anchor is placed. Can be screwed and attached. That is, it becomes easy to change the bolt length after the post-construction anchor is placed, and the flexibility of construction can be enhanced. Further, by pulling the mounting bolt screwed to the vicinity of the tip of the female screw of the cone toward the surface side of the concrete skeleton, it is possible to obtain an additional expansion force for the expansion piece and an additional fixing force for the concrete skeleton. Post-construction Anchor fixtures can be more firmly and stably fixed to the concrete skeleton.

The post-construction anchor mounting structure of the present invention has an outer diameter substantially corresponding to the male screw on the tip end side of the male screw of the mounting bolt as the elastic member of the post-construction anchor device, and spirals at the same pitch as the male screw. It is characterized in that an elastic coil wound around is provided.
According to this, it is possible to obtain an elastic member which has a simple structure and can be hooked on the thread of the female thread of the cone at low cost. In addition, by using an elastic coil that has an outer diameter that roughly corresponds to the male screw and is spirally wound at the same pitch as the male screw, smooth screwing of the cone to the female screw can be performed even at the elastic member of the mounting bolt. Can be secured.

According to the present invention, it is possible to prevent the main body from coming off from the concrete skeleton and the bolts from loosening, and it is easy to change the bolt length after the post-construction anchor is placed, so that the flexibility of construction can be enhanced. ..

(A) is a perspective view of the post-construction anchor according to the first embodiment according to the present invention, and (b) is a perspective view of the post-construction anchor in the expanded state according to the first embodiment. (A) is a front view of the post-construction anchor of the first embodiment, (b) is a right side view of the same figure (a), and (c) is a front view of the disassembled state of the post-construction anchor of the first embodiment. d) is a right side view of the cone of the figure (c), (e) is a front view of the expanded state of the post-construction anchor after the first embodiment, and (f) is a right side view of the figure (e). (A) is a vertical sectional explanatory view of a state in which the post-construction anchor is driven into the concrete skeleton after the first embodiment, and (b) is a vertical sectional explanatory view of a state in which the post-construction anchor device of the first embodiment is attached to the concrete skeleton. (A) to (e) are longitudinal explanatory views showing the construction procedure of the post-construction anchor mounting structure according to the first embodiment. (A) is an exploded front view of the post-construction anchor device according to the second embodiment according to the present invention, (b) is a partial longitudinal explanatory view of the post-construction anchor and the mounting bolt according to the second embodiment, and (c) is the second embodiment. Post-construction explanatory view of the form with the anchor device attached to the concrete skeleton. (A) and (b) are perspective explanatory views explaining the mounting structure of the elastic coil in the mounting bolt of the post-construction anchor device according to the second embodiment. (A) is a partial vertical front view of the state where the conventional main body driving type post-construction anchor is driven into the concrete skeleton, and (b) is a part of the state where the main body of the conventional main body driving type post-construction anchor comes out. The vertical sectional front view, (c) is a partial vertical sectional front view in a state where the mounting bolts of the construction anchor have been loosened after the conventional main body driving type. (A) is a partial longitudinal front view of the conventional sleeve driving type male screw type post-construction anchor attached to the concrete skeleton, and (b) is the thickness of the attachment with respect to the post-construction anchor in the figure (a). A partial vertical front view illustrating the case where the concrete becomes thicker.

[Installed anchor mounting structure of the first embodiment Noah]
As shown in FIGS. 1 to 3, the post-construction anchor device 1 according to the first embodiment according to the present invention includes a post-construction anchor 2 composed of a tubular main body 3 and a substantially head cone-shaped cone 4. A mounting bolt 5 is provided. The post-construction anchor 2 is a metal main body driving type anchor.

The tubular main body 3 of the first embodiment has a substantially cylindrical shape integrally formed of metal, and a slit 31 is cut in the front portion thereof from the tip to the middle, and an expansion piece divided by the slit 31. 32 is provided. In the illustrated example, the slits 31 extending in the axial direction are formed at four locations separated in the circumferential direction, and the slits 31 and 31 form an expansion piece 32. The outer peripheral surface of the expansion piece 32 is an uneven surface in which irregularities are repeated in the axial direction in order to increase the frictional force with concrete.

The cone 4 of the first embodiment has a substantially vertical cone shape integrally formed of metal, and its diameter is gradually increased toward the front. A female screw hole 41 extending in the axial direction is provided through the cone 4, and a female screw 42 is formed from the vicinity of the front end to the vicinity of the rear end of the female screw hole 41. A fitting groove 43 is formed in the female screw hole 41 near the tip of the female screw 42 so as to extend outward and in the circumferential direction from the inner peripheral surface of the female screw hole 41, and the leaf spring 44 which is an elastic member is formed in the fitting groove 43. Is fitted and fixed.

The leaf spring 44 has an arc shape and is provided so as to partially project into the female screw hole 41 of the cone 4, and the tip thereof is provided so as to project slightly inward from the thread of the female screw 42. It is installed so that it can be hooked on a thread near the tip of the male screw 51 of the mounting bolt 5, which will be described later. The leaf spring 44 of the illustrated example has an arc shape having a length of about 1/4 of the circumference, and a pair of leaf springs 44 and 44 are arranged at opposite positions.

In a normal state such as during distribution, only the rear end portion of the cone 4 is installed in the front end portion of the main body 3 to form a post-construction anchor 2. In this state, the expansion piece 32 is in a non-expansion state. The main body 3 has a substantially cylindrical shape over the entire length (see FIG. 2A). When the expansion piece 32 of the main body 3 is brought into the expanded state, the main body 3 is driven toward the front where the diameter of the cone 4 is gradually expanded, and the cone 4 is relatively press-fitted into the expansion piece 32 of the main body 3. Then, the expansion piece 32 is expanded with the cone 4 inserted.

In the post-construction anchor device 1, the mounting bolt 5 is screwed into the cone 4 of the post-construction anchor 2 (see FIG. 3B). The mounting bolt 5 of the present embodiment is a full-threaded bolt, and a male screw 51 is formed on the outer circumference over the entire length. The mounting bolt 5 is separate from the post-construction anchor 2 when the post-construction anchor 2 is in a non-expanded state such as during distribution, and the expanded piece 32 of the post-construction anchor 2 is in an expanded state. In this case, the male screw 51 is screwed into the female screw 42 of the cone 4 which is inserted into the tubular main body 3 from the rear and has entered the inside of the expansion piece 32. When the post-construction anchor 2 is in the expanded state and the tip of the male screw 51 of the mounting bolt 5 is screwed ahead of the leaf spring 44, the leaf spring 44 is an elastic member provided near the tip of the female screw 42 of the cone 4. Is hooked on the thread near the tip of the male screw 51 of the mounting bolt 5, and is installed so as to be hooked near the tip of the male screw 51.

In the post-construction anchor mounting structure of the first embodiment, as shown in FIG. 3, the expansion piece 32 is expanded in the state where the cone 4 is inserted into the expansion piece 32 of the main body 3 in the perforation 81 of the concrete skeleton 8. The expansion piece 32 is provided so as to bite into the hole wall of the perforation 81. Then, the mounting bolt 5 is inserted into the main body 3 and screwed until the tip of the male screw 51 of the mounting bolt 5 is positioned ahead of the tip of the female screw 42 of the cone 4, and the leaf spring 44 corresponding to the elastic member is screwed to the mounting bolt 5. It is provided so as to be hooked on a thread near the tip of the male screw 51 of the above.

When the mounting object 7 is attached to the mounting bolt 5 protruding from the concrete skeleton 8, the mounting object 7 is extrapolated to the protruding portion of the mounting bolt 5, and for example, a washer 61 and a spring washer 62 project from the mounting bolt 5 to the outside. It is extrapolated to the portions in order, and the nut 63 is screwed onto the male screw 51 of the mounting bolt 5 on the outside thereof. The attachment 7 is fixedly attached to the concrete skeleton 8 by the tightened nut 63.

When constructing the post-construction anchor mounting structure of the first embodiment, as shown in FIGS. 4A and 4B, a perforation 81 is formed in the concrete skeleton 8, and after cleaning the inside of the perforation 81, the post-construction anchor is constructed. 2 is inserted into the perforation 81 from the front side of the cone 4. The depth of the perforation 81 is substantially corresponding to the length of the construction anchor 2 after being expanded, and at this point, a part of the main body 3 of the construction anchor 2 is outside the concrete skeleton 8 after being inserted into the perforation 81. It is in a protruding state.

After that, as shown in FIG. 4C, a dedicated driving rod 91 is driven with a hammer 92 to drive the tubular main body 3 toward the back of the hole of the drilling 81, and the cone 4 is driven into the expansion piece 32 of the main body 3. The expansion piece 32 is relatively press-fitted, and the cone 4 whose diameter is gradually expanded toward the front is inserted into the expansion piece 32 to expand the expansion piece 32. The expanded piece 32 is frictionally fixed by biting into the wall surface of the perforation 81 in a wedge shape, and primary fixing is performed (see the expanding force F1 indicated by the thick arrow in FIG. 4C).

After that, as shown in FIGS. 4D and 4E, the mounting object 7 is arranged on the surface of the concrete skeleton 8, and the mounting bolt 5 is inserted into the main body 3 so as to be inserted into the hole of the mounting object 7. Then, the male screw 51 of the mounting bolt 5 inserted into the main body 3 is screwed into the female screw 42 of the cone 4 that has entered the inside of the expansion piece 32, and the tip of the male screw 51 of the mounting bolt 5 is from the tip of the female screw 42 of the cone 4. It is screwed until it reaches the tip position, and the thread near the tip of the male screw 51 of the mounting bolt 5 is hooked on the leaf spring 44 of the cone 4. When the thread near the tip of the male screw 51 of the mounting bolt 5 is caught on the leaf spring 44, the tightening torque changes significantly, so that the operator can reliably perform the predetermined tightening work of the mounting bolt 5.

Further, a washer 61 and a spring washer 62 are externally inserted from the outside of the mounting object 7 into a protruding portion of the mounting bolt 5 that has been tightened in a predetermined manner from the concrete skeleton 8, and a nut 63 is attached from the outside to the male screw 51 of the mounting bolt 5. Screw in. Then, the spring washer 62, the washer 61, and the attachment 7 are pressed against the surface of the concrete skeleton 8 by the nut 63 and tightened until they are urged, and the attachment 7 is completed. In this state, the mounting bolt 5 secured by the leaf spring 44 is pulled toward the surface side of the concrete skeleton 8 by a predetermined tightening of the nut 63, and the cone 4 is pulled axially from the tip by a tensile force P to expand. An additional expansion force F2 is generated on the piece 32. When a force in the pulling direction acts on the mounting bolt 5 in this way, the cone 4 has a structure in which the force acts in the direction of expanding the expanding piece 32 of the main body 3, so that the force in the pulling direction acts on the mounting bolt 5. Even if this occurs, there is no concern that the main body 3 will come off or the mounting bolt 5 will loosen.

According to the first embodiment, the leaf spring 44 near the tip of the female screw 42 of the cone 4 is hooked near the tip of the male screw 51 of the mounting bolt 5, so that the main body 3 can be pulled out from the concrete skeleton 8 and the mounting bolt 5 can be hooked. Can be prevented from loosening. Further, after driving the main body 3 to expand the expanding piece 32 and installing the main body 3 and the cone 4 on the concrete skeleton 8, in other words, after the main body driving type, after the construction anchor 2 is driven, the required length is obtained. The mounting bolt 5 can be screwed and mounted. That is, it becomes easy to change the bolt length after the post-construction anchor is placed, and the flexibility of construction can be enhanced. In addition, it is not necessary to prepare expensive taper bolts with special shapes in various lengths, which is economical.

Further, since the leaf spring 44 is located near the tip of the female screw 42 of the cone 4, the male screw 51 does not get caught in the leaf spring 44 up to the leaf spring 44 near the tip, so that the cone 4 of the male screw 51 of the mounting bolt 5 does not get caught. A smooth screwing with respect to the female screw 42 can be ensured. Further, by pulling the mounting bolt 5 screwed to the vicinity of the tip of the female screw 42 of the cone 4 toward the surface side of the concrete skeleton 8, an additional expanding force on the expanding piece 32 and an additional fixing force on the concrete skeleton 8 are obtained. The post-construction anchor fixture 1 can be more firmly and stably fixed to the concrete skeleton 8.

Further, the elastic member hooked on the male screw 51 of the mounting bolt 5 is a leaf spring 44 that partially protrudes into the female screw hole 41 of the cone 4, so that the male screw 51 of the mounting bolt 5 has a simple structure and low cost. An elastic member to be hooked can be obtained. Further, when the thread of the male screw 51 of the mounting bolt 5 is caught on the leaf spring 44, the tightening torque changes significantly, so that the operator can easily recognize that the predetermined tightening work of the mounting bolt 5 has been performed reliably. It becomes possible to do.

[Installed anchor mounting structure of the second embodiment Noah]
As shown in FIG. 5, the post-construction anchor device 1a according to the second embodiment of the present invention includes a post-installation anchor 2a composed of a tubular main body 3a and a substantially frustum-shaped cone 4a, and a mounting bolt 5a. To be equipped. The post-construction anchor 2a is a metal main body driving type anchor.

The tubular main body 3a has the same configuration as the main body 3 of the first embodiment, and the expansion piece 32a divided by the slit 31a is provided in the front portion, and the outer peripheral surface of the expansion piece 32a has a frictional force with concrete. It is a concavo-convex surface where unevenness repeats in the axial direction in order to increase.

The cone 4a is a substantially cone-shaped cone integrally formed of metal, and its diameter is gradually increased toward the front. A female screw hole 41a extending in the axial direction is provided through the cone 4a, and a female screw 42a is formed from the front end to the rear end of the female screw hole 41a. The cone 4a of the second embodiment is not provided with a fitting groove or a leaf spring as in the cone 4 of the first embodiment.

In a normal state such as during distribution, only the rear end portion of the cone 4a is installed in the front end portion of the main body 3a to form a post-construction anchor 2a. In this state, the expansion piece 32a is in a non-expansion state. The main body 3a has a substantially cylindrical shape over the entire length. When the expanded piece 32a of the main body 3a is brought into the expanded state, the main body 3a is driven toward the front where the diameter of the cone 4a is gradually expanded, and the cone 4a is relatively press-fitted into the expanded piece 32a of the main body 3a. Then, the expansion piece 32a is expanded with the cone 4a inserted.

In the post-construction anchor device 1a, the mounting bolt 5a is screwed into the cone 4a of the post-construction anchor 2a. In the mounting bolt 5a of the second embodiment, a male screw 51a is formed on the outer circumference extending from the rear end other than the front end portion to the entire length. The front end portion of the mounting bolt 5a is provided with a small diameter portion 52a having a diameter smaller than the formation region of the male screw 51a and protruding forward, and a coil holding groove 53a is formed at the tip of the small diameter portion 52a. A holding portion 541a formed on the tip side of the elastic coil 54a in a shape that follows the shape of the coil holding groove 53a of the elastic coil 54a is fitted and locked in the coil holding groove 53a, and a small diameter portion is formed on the tip side of the male screw 51a of the mounting bolt 5a. An elastic coil 54a is provided on the outer circumference of the 52a (see FIG. 6). The elastic coil 54a has an outer diameter substantially corresponding to that of the male screw 51a, and is spirally wound at the same pitch as the male screw 51a. The elastic coil 54a corresponds to an elastic member that can be hooked on the tip side of the male screw 51a near the tip of the female screw 42a of the cone 4a.

The mounting bolt 5a is separate from the post-construction anchor 2a when the post-construction anchor 2a is in a non-expanded state such as during distribution, and the expanded piece 32a of the post-construction anchor 2a is in the expanded state. In this case, the elastic coil 54a and the subsequent male screw 51a are screwed into the female screw 42a of the cone 4a which is inserted into the tubular main body 3a from the rear and has entered the inside of the expansion piece 32a. When the elastic coil 54a of the mounting bolt 5a is screwed into the female screw 42a, the elastic coil 54a is screwed in while the holding portion 541a of the elastic coil 54a is held in the coil holding groove 53a while the diameter of the elastic coil 54a is reduced. Then, when the post-construction anchor 2a is in the expanded state and the elastic coil 54a of the mounting bolt 5a is screwed to the vicinity of the tip of the female screw 42a of the cone 4a, the elastic coil 54a is urged outward in the radial direction, and the elastic coil 54a Is urged and fastened to the female screw 42a to prevent the mounting bolt 5a from loosening.

Even in the post-construction anchor mounting structure of the second embodiment, the expansion piece 32a is expanded in a state where the cone 4a is inserted into the expansion piece 32a of the main body 3a in the perforation 81a of the concrete skeleton 8a, and the expansion piece 32a is formed. It is provided so as to bite into the hole wall of the perforation 81a. Then, the mounting bolt 5a is inserted into the main body 3a, the elastic coil 54a of the mounting bolt 5a and the male screw 51a following the mounting bolt 5a are screwed to the vicinity of the tip of the female screw 42a of the cone 4a, and the elastic coil 54a on the tip side of the male screw 51a is a cone. It is hooked near the tip of the female screw 42a of 4a.

When the mounting object 7a is attached to the mounting bolt 5a protruding from the concrete skeleton 8a, the mounting object 7a is extrapolated to the protruding portion of the mounting bolt 5a, and for example, a washer 61a and a spring washer 62a protrude from the mounting bolt 5a. The nuts 63a are extrapolated to the portions in order, and the nut 63a is screwed into the male screw 51a of the mounting bolt 5a on the outside thereof. The attachment 7a is fixedly attached to the concrete skeleton 8a by the tightened nut 63a.

When constructing the post-construction anchor mounting structure of the second embodiment, after performing the primary fixing of the post-construction anchor 2a by the same procedure as in FIGS. 4 (a) to 4 (c) of the first embodiment, The attachment 7a is arranged on the surface of the concrete skeleton 8a, and the attachment bolt 5a is inserted into the main body 3a so as to be inserted into the hole of the attachment 7a. Then, the elastic coil 54a of the mounting bolt 5a inserted into the main body 3a and the male screw 51a following the elastic coil 54a are screwed into the female screw 42a of the cone 4a that has entered the inside of the expansion piece 32a, and the elastic coil 54a is the female screw 42a of the cone 4a. It is screwed until it is located near the tip, and the elastic coil 54a is hooked to the vicinity of the tip of the female screw 42a of the cone 4a by elastic urging.

Further, a washer 61a and a spring washer 62a are externally inserted from the outside of the mounting object 7a into a protruding portion of the mounting bolt 5a that has been tightened in a predetermined manner from the concrete skeleton 8a, and a nut 63a is attached from the outside to the male screw 51a of the mounting bolt 5a. Screw in. Then, the spring washer 62a, the washer 61a, and the attachment 7a are pressed against the surface of the concrete skeleton 8a by the nut 63a and tightened until they are urged, and the attachment 7a is completed. In this state, as in the first embodiment, the mounting bolt 5a is pulled toward the surface side of the concrete skeleton 8a by a predetermined tightening of the nut 63a, and the cone 4a is pulled axially from the tip and added to the expansion piece 32a. Generates the expansion force of.

According to the second embodiment, the elastic coil 54a on the tip side of the male screw 51a of the mounting bolt 5a is hooked near the tip of the female screw 42a of the cone 4a, so that the main body from the concrete skeleton 8a is hooked by the elastic coil 54a. It is possible to prevent the 3a from coming off and the mounting bolt 5a from loosening. Further, after the main body 3a is driven to expand the expansion piece 32a and the main body 3a and the cone 4a are installed on the concrete skeleton 8a, in other words, after the main body is driven, the required length is obtained after the construction anchor 2a is placed. The mounting bolt 5a can be screwed and mounted. That is, it becomes easy to change the bolt length after the post-construction anchor is placed, and the flexibility of construction can be enhanced.

Further, the mounting bolt 5a screwed to the vicinity of the tip of the female screw 42a of the cone 4a is pulled toward the surface side of the concrete skeleton 8a, so that an additional expansion force is added to the expansion piece 32a and an additional fixing force is added to the concrete skeleton 8a. The post-construction anchor device 1a can be more firmly and stably fixed to the concrete skeleton 8a.

Further, by using the elastic coil 54a as the elastic member, it is possible to obtain an elastic member that has a simple structure and can be hooked on the female screw 42a of the cone 4a at low cost. Further, by using an elastic coil 54a that has an outer diameter substantially corresponding to the male screw 51a and is spirally wound at the same pitch as the male screw 51a, the elastic member of the mounting bolt 5a can also be connected to the female screw 42a of the cone 4a. Smooth screwing can be ensured.

[Scope of inclusion of the invention disclosed herein]
The invention disclosed in the present specification is specified by changing the partial contents thereof to other contents disclosed in the present specification to the extent applicable, in addition to the inventions listed as inventions and the embodiments. Or, those specified by adding other contents disclosed in the present specification to these contents, or those specified by deleting these partial contents to the extent that a partial effect can be obtained and making them into a higher concept. Including. The invention disclosed in the present specification also includes the following modifications and additional contents.

The elastic member provided near the tip of the female screw of the cone in the present invention and hooked near the tip of the male screw of the mounting bolt is not only the leaf spring 44 of the first embodiment but also appropriately within the scope of the purpose of the present invention. For example, an elastic coil accommodating portion is formed in the female screw hole on the tip side of the female screw of the cone, and the elastic coil is accommodated as an elastic member in this accommodating portion, and the accommodated elastic coil is hooked near the tip of the male screw of the mounting bolt. It is possible to have a configuration or the like.

Further, the elastic member provided on the tip side of the male screw of the mounting bolt in the present invention and hooked near the tip of the female screw of the cone is also locked by fitting the holding portion 541a into the coil holding groove 53a of the second embodiment. In addition to the elastic coil 54a to be formed, it is appropriate within the scope of the gist of the present invention.

Further, the tubular main body in the present invention includes not only a cylindrical main body but also a square tubular main body, and the substantially cylindrical cone in the present invention has a substantially cylindrical cone. In addition to cones, cones such as a substantially pyramidal cone are also included.

The present invention can be used, for example, when various attachments such as attachment plates and supports are attached to a concrete skeleton.

1, 1a ... Post-construction anchor fixture 2, 2a ... Post-construction anchor 3, 3a ... Main body 31, 31a ... Slit 32, 32a ... Expansion piece 4, 4a ... Cone 41, 41a ... Female screw hole 42, 42a ... Female screw 43 ... Fitting groove 44 ... Leaf spring 5, 5a ... Mounting bolt 51, 51a ... Male screw 52a ... Small diameter part 53a ... Coil holding groove 54a ... Elastic coil 541a ... Holding part 61, 61a ... Washer 62, 62a ... Spring washer 63, 63a ... Nuts 7, 7a ... Attachments 8, 8a ... Concrete skeleton 81, 81a ... Drilling 91 ... Driving rod 92 ... Hammer F1 ... Expansion force F2 ... Additional expansion force P ... Tensile force 100 ... Post-construction anchor 110 ... Body 111 ... Expansion Open piece 112 ... Female screw 120 ... Cone 130 ... Mounting bolt 140 ... Washer 150 ... Mounting object 160 ... Concrete skeleton 200 ... Post-construction anchor 210 ... Tapered bolt 211 ... Tapered part 212 ... Male screw part 220 ... Sleeve 221 ... Expanded piece 231 ... Washer 232 ... Spring washer 233 ... Nut 240 ... Attachment 250 ... Concrete skeleton

Claims (4)

A tubular body with a spread piece at the front,
A frustum-shaped cone with a female screw formed inside and at least the rear end inside the main body.
It is provided with a mounting bolt that is inserted into the main body and a male screw is screwed into the female screw of the cone.
A post-construction anchor mounting structure in which a post-construction anchor device is provided in which an elastic member to be hooked near the tip of the male screw of the mounting bolt is provided near the tip of the female screw of the cone.
In the perforation of the concrete skeleton, the expansion piece is expanded with the cone inserted into the expansion piece of the main body, and the expansion piece is provided so as to bite into the hole wall of the perforation.
The mounting bolt is inserted into the main body, and the male screw is screwed to the vicinity of the tip of the female screw of the cone.
The elastic member is provided so as to be hooked near the tip of the male screw of the mounting bolt, and is also provided.
A post-construction anchor mounting structure characterized in that the mounting bolt is tightened to a nut and pulled toward the surface side of the concrete skeleton . The post-construction anchor mounting structure according to claim 1, wherein a leaf spring that partially protrudes into the female screw hole of the cone is provided as the elastic member of the post- construction anchor device . A tubular body with a spread piece at the front,
A frustum-shaped cone with a female screw formed inside and at least the rear end inside the main body.
It is provided with a mounting bolt that is inserted into the main body and a male screw is screwed into the female screw of the cone.
A post-construction anchor mounting structure in which a post-construction anchor device is provided in which an elastic member to be hooked near the tip of the female screw of the cone is provided on the tip end side of the male screw of the mounting bolt.
In the perforation of the concrete skeleton, the expansion piece is expanded with the cone inserted into the expansion piece of the main body, and the expansion piece is provided so as to bite into the hole wall of the perforation.
The mounting bolt is inserted into the main body, and the male screw is screwed into the female screw of the cone.
The elastic member on the tip end side of the male screw of the mounting bolt is provided so as to be hooked near the tip of the female screw of the cone.
A post-construction anchor mounting structure characterized in that the mounting bolt is tightened to a nut and pulled toward the surface side of the concrete skeleton . As the elastic member of the post-construction anchor device, an elastic coil having an outer diameter substantially corresponding to the male screw and spirally wound at the same pitch as the male screw is provided on the tip end side of the male screw of the mounting bolt. The post-construction anchor mounting structure according to claim 3, wherein the structure is characterized by the above .

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