JP4362855B2 - Structure of nailing part of concrete embedded member - Google Patents

Description

  The present invention relates to a structure of a nail driving portion for fixing a concrete burying member, such as a wiring box and a conduit end protector, embedded in a concrete wall to a formwork material for concrete placement.

  As a structure of a nail driving portion for fixing a concrete burying member to a formwork material for placing concrete, the present inventor locks the inserted nail head and extends the nail head along the axial direction. Proposed a structure characterized by comprising a support part that supports a substantially half circumference of the nail shaft and a nail head and a nail extraction part along the axial direction of the nail shaft through which the nail shaft can pass on the opposite side of the support part. (See Patent Document 1).

  According to the structure of the nail driving portion, if the tip of the nail shaft protruding from the concrete wall is sandwiched with pliers or the like, or moved with a hammer or the like in the direction of the nail removal portion, the nail head and nail shaft are It can be removed from the concrete burying member by leaving the nail shaft away from the support portion and then pulling the tip of the nail shaft downward.

  However, in the case of this structure, since it is necessary to provide a large step for forming the nail omission portion in the immediate vicinity of the nail support portion, there is a problem that it is difficult for the hammer or the like to come into contact with the step and drive the nail.

  As a means for solving such a problem, a protrusion for temporary attachment is provided on the opening side outer periphery of the case body having a space-like opening inside, and a penetration through which a nail is passed through the protrusion There has been a structure in which a hole is provided toward the bottom surface side, and a portion on the entrance side of the through hole is closed with a thin film (see Patent Document 2).

  According to the structure of this nail driving portion, the nail used for attachment is removed by removing the formwork material, holding the tip of the nail protruding from the through hole with a tool, etc., and tearing the thin film with the nail head to remove the nail Therefore, it is not necessary to provide a nail removal part for pulling out the nail head in the vicinity of the nail driving part, so that the driving of a hammer or the like is not disturbed.

  However, if the means for closing the entrance portion of the through hole with a thin film as in this conventional example is adopted, when the nail is driven with a hammer or the like, the thin film is broken by the nail head and the nail head is buried in the thin film. There was a problem. Occasionally, there were cases where nails were driven too far and the nail fell out on the back side, making it impossible to fix the formwork.

Japanese Utility Model Publication No. 63-16773 Japanese Utility Model Publication No. 6-26023 (page 2, Fig. 2)

  Therefore, the present invention has been made to solve the above-described problems, and the problem to be solved by the present invention is to ensure that a tool such as a hammer does not come into contact with the main body, without worrying about it. Another object of the present invention is to provide a structure of a nail driving portion of a concrete burying member that can be driven easily and can be driven without worrying about burying of the nail.

  In order to solve the above problems, the means taken by the invention described in claim 1 is to fix the concrete burying member 50 embedded in the concrete wall 60 to the formwork material 70 for placing concrete. Further, the structure of the nail driving portion provided in the concrete burying member 50, the extending portion 16 formed adjacent to the main body portion 10 of the concrete burying member 50, and the nail can be driven from above, The nail support portion 11 that supports the head portion 31 of the nail that has been driven in, and the nail support portion 11 are formed lower than the extension portion 20 by a height substantially equal to the height of the head portion 31 of the nail. Accordingly, a step 12 provided between the extending portion 16 and the nail support portion 11 is provided. In order to remove the nail 30 driven into the nail support portion 11, the step 12 is provided with a step of the nail. Head 31 is behind extension 16 The nail head passage portion 14 is provided so as to be movable, and the nail shaft portion 32 is moved to the extended portion 16 or the back side of the nail support portion 11 along with the movement of the head portion 31 of the nail. The structure of the nail driving portion of the concrete embedding member 50 is characterized in that the nail shaft passage portion 14 is provided.

  The means taken by the invention according to claim 2 is formed so that the entire nail 30 can be moved in parallel to the nail head passage portion 13 so that the nail head portion 31 and the nail shaft portion 32 can be passed to the back side. The structure of the nail driving portion of the concrete embedding member 50 according to claim 1, wherein the structure is a nailing portion.

  According to the third aspect of the present invention, the nail head portion 31 and the nail shaft portion 32 can pass through the back side by rotating the nail head portion 31 with the nail shaft portion 32 as a fulcrum. The structure of the nail driving portion of the concrete embedding member 50 according to claim 1 or 2, wherein the structure is formed as described above.

  The means adopted by the invention according to claim 4 is provided with a shaft support portion 17 for supporting the shaft portion 32 of the nail when the nail 30 is rotated. The structure of the nail driving portion of the concrete burying member 50 is used.

  The means adopted by the invention according to claim 5 is the partition 18 on the back side of the concrete embedding member 50 and between the nail support portion 11 and the main body portion 10 so that the cast concrete does not flow into the back side of the main body portion 10. The structure of the nail driving portion of the concrete burying member 50 according to any one of claims 1 to 4, wherein the structure is provided.

  The means adopted by the invention of claim 6 is characterized in that a thin film 19 is formed in the nail head passage portion 13 and / or the nail shaft passage portion 14. The structure of the nail driving portion of the concrete embedding member 50 described in the above section.

  As described above, according to the structure of the nail driving portion of the concrete embedding member according to claim 1 of the present invention, the nail support portion is lower than the main body portion by substantially the same height as the head height of the nail. Thus, when the concrete burying member is fixed to the formwork member with a nail, the main body part can interfere with a hammer or the like, and can be easily and quickly nailed without being hindered. Further, by providing the nail head passage part on the side of the nail support part, it is possible to ensure the removal of the nail and to reliably support the head of the nail at the place where the nail is struck. Furthermore, since the extending part is further provided at the end of the main body part, the nail support part can be provided with the optimum height and size for nailing.

  Furthermore, according to the invention described in claim 2, the nail can be easily removed by moving the nail in parallel. According to the invention described in claim 3, the nail is rotated to remove the nail. Can be removed. Further, according to the invention having both the third and fourth aspects, the nail can be removed by any of the methods. Therefore, the nail can be easily removed by appropriately using depending on the place where the concrete burying member is arranged. Removal work can be performed. Further, according to the fourth aspect of the present invention, the nail can be rotated with the shaft portion of the nail as a fulcrum, so that the nail can be removed with a weak force.

  Furthermore, according to the fifth aspect of the present invention, even when ready concrete flows in from the nail head passage portion or the nail shaft passage portion, the partition can prevent the concrete from flowing into the main body portion. Furthermore, according to the sixth aspect of the invention, by forming a thin film at the nail head passage portion or the nail shaft passage portion, the inflow of concrete can be prevented by this thin film.

  Furthermore, according to the seventh aspect of the present invention, a concrete disposing member having the same effect as that of the first aspect can be provided.

  The concrete embedding member provided with the nail driving portion of the present invention refers to a member embedded in a concrete wall surface, ceiling or the like while exposing a part of the main body. Therefore, as long as a part of the main body is disposed so as to be exposed on the concrete surface, the purpose and method of use thereof are not limited. In addition, for example, a wiring box used by inserting a wire such as a conduit or a connector into a cover member having an opening, a conduit end protector used for protecting a terminal of a buried conduit, and a suspension bolt are fixed. An insert or the like that is used for this purpose is conceivable. The reason why the main body is disposed while being partly exposed is that, as a result of the method for attaching the concrete embedding member, the main body is exposed and disposed on the concrete surface. Therefore, it is not necessary that the concrete burying member has various functions by being exposed to the surface. Therefore, the concrete burying member may be an intermediate member or the like for attaching the above wiring box or the like.

  The above concrete-embedded members are temporarily attached to the formwork with nails, and then the ready-mixed concrete is placed in the formwork, and after the concrete has hardened, the formwork is removed and installed in the concrete wall. . At this time, since the nail used to fix the formwork material is left on the concrete burying member, the nail is removed from the back side of the concrete burying member to complete. The present invention provides a structure of a nail driving portion for fixing such a concrete burying member to a formwork member with a nail, and removing the fixed nail, and a concrete burying member having this structure. is there. In the present specification, the “front side” of the concrete burying member refers to the side into which the nail is driven, and the “back side” refers to the side from which the nail is pulled out.

  In the structure of the nail driving portion of the present invention, a nail support portion is provided adjacent to the main body portion so that the nail can be driven into the formwork material via the concrete burying member. The nail support part is provided so that the nail can be driven and the head of the nail can be securely locked on the upper surface. As a configuration for supporting the head of the nail, the nail hole is thickened so that the periphery of the hole into which the nail is driven is not torn or dented, or a rib is provided on the back side to provide a nail hole. Although the structure which reinforces the circumference | surroundings, etc. can be considered, it is not limited to these. The reason for adopting such a configuration is to prevent the head of the nail from being buried in the back side when the nail is driven with a hammer or the like.

  Further, the nail support portion is provided at a position lower than the height of the head portion of the nail driven from the adjacent main body portion by the same height. This is because the nail support part is provided adjacent to the main body part, and if a large difference is made in height, it will be difficult to drive the nail when the nail is driven with a hammer or the like due to interference between the main body part and the hammer. is there. Therefore, the difference in height between the main body and the nail support is formed to be substantially the same as the head of the nail so that the main body does not get in the way when driven with a hammer or the like.

  On the other hand, since the nail support part is provided one step lower, a step is formed between the main body part and the nail support part. The step is provided with a nail head passage portion through which the head of the nail can pass to the back side of the main body. The nail head passage portion is provided at the level difference because the support portion is provided so as to reliably support the head portion of the nail, and thus the head portion of the nail cannot be directly pulled out to the back side of the support portion. This is because the nail is pulled out in the lateral direction using the side surface of the step. The shape, shape, etc. of the nail head passage portion are not particularly limited as long as the nail head portion can pass therethrough.

  On the other hand, when the nail head is moved to the nail head passage portion, the nail shaft portion also moves. Therefore, in order to secure the movement of the nail shaft portion, the nail is placed between the nail support portion and the nail head passage portion. A shaft passing portion is provided. The nail shaft passing portion is provided to have the same width as or wider than the nail shaft portion so that the nail shaft portion can pass through, but the nail head portion cannot be pulled out to the back side. Is preferably formed narrow. A thin film that can be broken by moving the nail from the back side using a tool may be formed on the nail head passage portion and the nail shaft passage portion. If such a thin film is formed, the ready-mixed concrete will enter the interior from the nail head passing part and the nail shaft passing part when placing the ready-mixed concrete after fixing the concrete burying member to the formwork material. Can be prevented. In addition, if a partition is provided on the back side of the concrete embedded member and between the nail support part and the main body part, even if ready concrete flows in from the nail head passage part or the nail shaft passage part, It is possible to prevent the ready-mixed concrete from flowing in.

  By the way, as used herein, “the height substantially the same as the height of the nail head” means that “the nail head from the nail head passage portion provided in the step is the main body as described above. While being formed slightly higher than the head of the nail so that a nail head passing portion can be provided so that it can pass to the back side of the portion, a step or the like is formed slightly higher than the head of the nail, but a hammer or the like "Height that can be driven in enough with the nail tool." Therefore, if it is formed to a height that allows the nail to be sufficiently driven into a hammer or the like while being somewhat disturbed by the main body, it is “the height substantially the same as the height of the head of the nail” of the present invention. include. Of course, in order to make it easier to drive the nail, it is preferable to form the nail at a height substantially the same as the height of the head of the nail. However, the lower the step, the larger the step depending on the thickness of the member forming the main body.In such a case, the step is reduced by scraping the upper surface in the vicinity of the support portion of the adjacent main body. The nail head passage portion may be formed by scraping the member of the main body portion itself. At this time, the shape of the nail head passage provided in the main body is not particularly limited.

  According to the structure of the nail driving portion configured in this way, after the mold material is removed, the nail head passes through the nail head by grasping the tip of the nail protruding to the back side of the concrete burying member. The nail shaft can be removed from the back side by passing the nail shaft passing portion through the portion. As a removal method at this time, the entire nail may be moved in parallel to the nail head passage and removed on the back side, or the nail head may be rotated with an arbitrary point of the nail shaft as a fulcrum. It may be removed on the back side. At this time, in order to facilitate the rotation of the nail, it is preferable to provide a shaft support portion on the back side so that the shaft portion of the nail can be supported.

  Further, an extended portion is formed from the main body portion and is provided in the extended portion. That is, a nail can be driven into the extended portion, and a nail support portion that can support the head portion of the nail is formed, and the nail support portion is extended by the same height as the height of the nail head portion. It is formed lower than the installation part. A step is formed between the extended portion and the nail support portion, a nail head passage portion is formed at the step, and a nail shaft passage portion is formed between the nail head passage portion and the nail support portion.

  Now, a preferred embodiment of the present invention configured as described above will be described with reference to the drawings. 1 to 9 show reference examples of the present invention. 10 and 11 show a first embodiment of the present invention, and FIGS. 12 and 13 show a second embodiment of the present invention.

(Reference example)
1 to 9 show a reference example of the present invention. FIG. 1 is a perspective view of a concrete embedding member 50 having a structure of a nail driving portion of a reference example. FIG. 2 is a perspective view showing the back surface of the concrete burying member in FIG. 1 (connectors are omitted). FIG. 3 is a cross-sectional view taken along line AA, showing a state in which the concrete burying member 50 is fixed to the temporary form frame 70 with the nail 30.

  In the reference example, as the concrete embedding member 50, a pipe connection cover for attaching a CD tube or a PF tube having a back side opened and a hollow inside is used. The concrete burying member 50 is formed so that a connector can be attached so that a CD pipe or a PF pipe can be attached. Screwed into both the connector and the cover, this connector is attached by screwing (not shown) without using a lock nut. Of course, the concrete burying member is not limited to these.

  The structure of the nail driving portion in the reference example is provided at both ends of the concrete burying member 50. At both ends of the concrete embedding member 50, a nail support portion 11 is provided adjacent to the main body portion 10 having a mounting function such as a connector, and the nail support portion 11 is formed one step lower than the main body portion 10 inside thereof. ing. A step 12 is formed between the main body 10 and the surface 11a on which the nail support 11 is provided. The height of the step 12 is provided at substantially the same height as the head 31 of the nail used. This height is appropriately selected and designed according to the height of the head 31 of the nail used.

  The nail support portion 11 includes a nail hole 11b having a size substantially the same as the shaft diameter of the nail shaft portion 32, and a periphery of the nail hole 11b that can support the head portion 31 of the nail when the nail 30 is driven into the nail hole 11b. The flat surface 11a. Furthermore, in the reference example, the rib 20 is provided on the back surface around the hole so that the head 31 of the nail can be reliably supported. A portion of the rib 20 on the back surface of the nail hole 11b has a circular portion having the same shape as the shaft portion 32 of the nail (see 20a), and guides the direction in which the nail 30 is driven. Further, a slight movement prevention protrusion 20b is provided on the middle of the rib 20 so that the shaft portion 32 of the driven nail does not move carelessly. In this manner, the rib 20 plays a role of holding the nail 30 and guiding the movement of the nail shaft 32 when the nail 30 is removed. In addition, the direction which moves the axial part 32 of a nail when removing the nail 30 among the back sides of the concrete embedding member 50 is formed in order to ensure the movement of the nail (see 20c in FIG. 2). Part reference).

  On the other hand, a nail shaft passage portion 14 is provided on the surface 11 a on which the nail support portion 11 is provided so that the nail shaft portion 32 can pass toward the step 12. The nail shaft passage portion 14 is formed by an opening groove having a width substantially the same as the width of the nail shaft portion 32, and a thin film 19 that can be easily broken by the nail shaft portion 32 is provided on the surface thereof. The nail shaft passing portion 14 is formed by an opening groove having a width such that the nail shaft portion 32 can pass through but the nail head portion 31 cannot pass through.

  A nail head passage portion 13 is formed in the step 12 continuously with the nail shaft passage portion 14. The nail head passage portion 13 is provided with a hole so that it can pass through the head portion 31 of the nail, and a thin film 19 is formed on the surface so as to be easily broken by the head portion 31 of the nail. At this time, in order to secure a step 12 having substantially the same height as the nail head 31, a part of the upper surface of the main body 10 may be shaved (see α in FIG. 3). The nail head passage portion 13 may be formed directly on the member forming the upper surface of the main body portion 10 (see FIG. 5). When the nail head passage portion 13 is formed directly on the main body portion 10, the nail head passage portion 13 may be formed along the trajectory through which the nail head portion 31 passes when the nail 30 is rotated as shown in FIGS. . Further, as shown in FIG. 7, on the surface 11a on which the nail support portion 11 is provided, the outer peripheral wall so that the upper surface is flush with the head 31 of the nail and the outer peripheral wall when the nail 30 is driven. May be provided so as to protrude upward (see β in FIG. 7).

  Now, the concrete embedding member 50 having the structure of the nail driving portion formed as described above is attached to the concrete as follows. First, the concrete embedding member 50 is brought into contact with the mold member 70 assembled before placing the ready-mixed concrete, and the nail 30 is driven through the nail holes 11b to fix the concrete embedding member 50 to the mold member 70. At this time, since the step 12 is formed at substantially the same height as the head 31 of the nail, the nail 30 can be easily driven to the end without being obstructed by the main body 10. And after connecting the necessary pipe materials etc. which are arrange | positioned in concrete via a connector, ready-mixed concrete is laid in the formwork material 70. FIG. Thereafter, after the concrete has hardened, the formwork 70 is removed and embedded in the concrete. However, the nail 30 fixed to the mold member 70 protrudes from the concrete wall in the concrete burying member 50. Therefore, as shown in FIG. 4, the tip of the protruding nail 30 is gripped with a tool or the like, and the nail 30 is moved in parallel to pass through the thin film 19 of the nail shaft passage portion 14 and the nail head passage portion 13. It is made to remove by the back side of the concrete embedding member 50. Alternatively, when the nail shaft passage portion 14 is formed as shown in FIG. 5, the nail shaft portion 32 is rotated with the portion of the opening of the concrete burying member 50 as a fulcrum as the shaft support portion 17. And the nail head passage part 13 is passed and removed (FIG. 6). If the opening is opened as shown in FIG. 8, the shaft support 17 is first formed immediately below the head 31 of the nail. Therefore, the head 31 of the nail and the shaft portion 32 of the nail can be rotated with a very weak force to allow the thin film 19 to pass through, and can be removed to the back side more easily. Further, as shown in FIG. 9, if two shaft support portions 17 that support the rotation of the nail shaft portion 32 are provided on the top and the bottom, the nail shaft portion 32 is slightly rotated by the upper shaft support portion 17 to thereby turn the nail head portion. The portion 31 can be brought close to the nail head passage portion 13 and rotated by the lower shaft support portion 17 to break and pass the thin film 19.

Example 1
10 and 11 show the first embodiment of the present invention. FIG. 10 is a perspective view of a concrete embedding member 50 having a nail driving portion structure according to the first embodiment (a connector is omitted). 11 is a cross-sectional view taken along the line BB in FIG.

  In the concrete embedding member 50 according to the first embodiment, the extending portion 16 is provided at the end of the main body portion 10. A rib serving as a partition 18 is formed between the extended portion 16 and the main body portion 10 and on the back side so as to block the main body portion 10 and the extended portion 16.

  On the further end side of the extended portion 16, a nail support portion 11 is formed one step lower than the extended portion 16, and the extended portion 16 and the nail support portion are similar to the main body portion 10 and the nail support portion 11 of the reference example. 11 is formed between the step 11 and the step 11. A nail head passage portion 13 is provided at the step 12, and a nail shaft passage portion 14 is formed from the nail head passage portion 13 to the nail support portion 11. In the first embodiment, the thin film 19 is not provided on the nail head passage portion 13 and the nail shaft passage portion 14.

  The concrete embedding member 50 produced as described above is embedded in the concrete wall by the same method as in the reference example. At this time, there is a possibility that ready concrete flows in from the nail head passage portion 13 and the nail shaft passage portion 14, but since the partition 18 is provided so as to block between the main body portion 10 and the extension portion 16, the main body portion The ready-mixed concrete can be prevented from flowing into 10.

  Then, like the reference example, the nail 30 jumping out from the embedded concrete burying member 50 is moved in parallel with the nail shaft passage portion 13 or the nail head 31 is rotated to remove the nail 30. Remove on the back side and finish.

  In the first embodiment, as shown in FIGS. 10 and 11, when the main body 10 itself has a considerable height, the nail support 11 is moved from the main body 10 to the same height as the nail head 31. Since the nail support part 11 is provided at a very high position only by forming it low, it must be fixed using a long nail. Therefore, in the case where the main body portion 10 is formed relatively high, it is effective to provide the extending portion 16 because the nail support portion 11 can be disposed at a low position.

(Example 2)
12 and 13 show a second embodiment of the present invention. FIG. 12 is a perspective view of a concrete embedding member 50 having a nail driving portion structure according to the second embodiment. 13 is a partial cross-sectional view of FIG.

  The concrete embedding member 50 having the structure of the nail driving portion according to the second embodiment is an intermediate member for arranging the wiring box in the air. The concrete burying member 50 is composed of a main body 10 formed entirely in a plate shape, and various structures for attaching a wiring box are applied to the plate-like body. Description of these structures is omitted because it is not related to the present invention.

On the other hand, the structure of the nail driving portion is provided at the end of the concrete disposing member 50. On the end side of the main body 10, a nail support 11 is formed one step lower than the main body 10, and between the main body 10 and the nail support 11, similar to the main body 10 and the nail support 11 in the reference example. A step 12 is formed. A nail head passage portion 13 is provided at the step 12, and a nail shaft passage portion 14 is formed from the nail head passage portion 13 to the nail support portion 11.
In the second embodiment, as shown in FIG. 13, the nail head passage portion 13 and the nail shaft passage portion 14 are plate-like bodies within a range sufficient to remove the head portion of the nail and the shaft portion of the nail on the back surface. It is provided by shaving itself.

  The concrete embedding member 50 produced as described above is fixed to the formwork 70 with the nail 30, and then the arrangement member is attached, and then embedded in the concrete wall. Then, the nail 30 that has jumped out from the embedded concrete burying member 50 moves the nail 30 in parallel with the nail shaft passage portion 13 as in the reference example, or rotates the nail head 31 to remove the nail 30. Removed from the back side.

It is a perspective view showing the concrete embedding member which has the structure of the nail drive part which concerns on a reference example. (Reference example) It is a perspective view showing the back side of the concrete embedding member which has the structure of the nail drive part which concerns on a reference example. (Reference example) It is AA sectional drawing of the concrete embedding member which has the structure of the nail drive part which concerns on a reference example. (Reference example) It is AA sectional drawing showing the method of removing the nail nailed in the concrete burying member which has the structure of the nail nailed part which concerns on the nail nailed part which concerns on FIG. (Reference example) It is AA sectional drawing showing the example of a change of the nail head passage part of the concrete embedding member which has the structure of the nail drive part which concerns on a reference example. (Reference example) It is AA sectional drawing showing the method of removing the nail nailed in the concrete embedding member which has the structure of the nail | pile driving part which concerns on FIG. (Reference example) It is sectional drawing which shows the modification of the plane in which the support part of the concrete embedding member which has the structure of the nail drive part which concerns on a reference example is formed. (Reference example) It is AA sectional drawing showing the example of a change of the axial support part of the concrete embedding member which has the structure of the nail drive part which concerns on a reference example. (Reference example) It is AA sectional drawing showing the further example of a change of the axial support part of the concrete embedding member which has the structure of the nail drive part which concerns on a reference example. (Reference example) It is a perspective view showing the concrete embedding member which has the structure of the nail drive part which concerns on Example 1. FIG. Example 1 It is a perspective view showing the back side of the concrete embedding member which has the structure of the nail drive part which concerns on Example 1. FIG. Example 1 It is a perspective view showing the concrete embedding member which has the structure of the nail drive part which concerns on Example 2. FIG. (Example 2) It is a partial cross section figure of the concrete embedding member which has the structure of the nail drive part which concerns on Example 2. FIG. (Example 2)

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Main body part 11 Nail support part 12 Step 13 Nail head passage part 14 Nail shaft passage part 15 Nail head drop part 16 Extension part 17 Axis support part 18 Partition 19 Thin film 30 Nail 31 Nail head part 32 Nail shaft part 50 Concrete embedding Member 60 Concrete wall 70 Formwork material

Claims (6)

In order to fix a concrete burying member embedded in a concrete wall to a formwork material for concrete placement, a structure of a nail driving portion provided in the concrete burying member,
An extending portion formed adjacent to the main body portion of the concrete burying member, a nail that can be driven from above, and a nail support portion that supports the head of the driven nail,
A step provided between the extended portion and the nail support portion so as to form the nail support portion lower than the extended portion by a height substantially equal to the height of the head of the nail,
In order to remove the nail driven into the nail support portion, the step is formed at a position adjacent to the head of the nail, and the head of the nail can be moved to the back side of the extending portion at the step. A nail head passage portion is provided, and the nail support portion is provided with a nail shaft passage portion that allows the nail shaft portion to move to the extended portion back side or the nail support portion back side along with the movement of the nail head portion. The structure of the nail driving part of the concrete burying member characterized by this.   2. The concrete embedding member according to claim 1, wherein the entire structure of the nail is formed so as to be able to pass through the back side of the nail head portion and the nail shaft portion by moving in parallel with the nail head passage portion. Nail driving structure.   3. The nail head portion and the nail shaft portion are formed so as to pass through the back side by rotating the nail head portion with the shaft portion of the nail as a fulcrum. The structure of the nailing part of the concrete embedding member described.   The structure of the nail driving part of the concrete embedding member according to claim 3, further comprising a shaft support part for supporting the shaft part of the nail when the nail is rotated.   5. The partition according to claim 1, wherein a partition is provided on the back side of the concrete embedding member and between the nail support portion and the main body portion so that the cast concrete does not flow into the back side of the main body portion. A structure of a nail driving portion of the concrete embedding member according to item 1.   The structure of the nail driving portion of the concrete embedding member according to any one of claims 1 to 5, wherein a thin film is formed in the nail head passage portion and / or the nail shaft passage portion.

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