JP4679650B2 - Expansion check tool - Google Patents

Description

  The present invention relates to a diameter expansion confirmation tool for confirming whether or not an enlarged diameter portion is properly formed when an enlarged diameter portion is formed in a deep portion of a fixing hole for fixing an anchor bolt.

  Conventionally, a fixing method using an anchor bolt has been adopted when fixing a fixed object such as equipment or the like to a foundation such as a concrete frame (Patent Document 1). Briefly speaking, this fixing method includes (a) a step of forming a fixing hole at a predetermined depth with respect to the foundation, and (b) a step of expanding the depth of the fixing hole to form an enlarged diameter portion. And (c) a step of inserting the anchor bolt into the fixing hole, (d) a step of expanding the end of the anchor bolt at the enlarged diameter portion, and (e) fixing the object to be fixed by the anchor bolt and the nut. The steps are executed in the order of description.

Japanese Patent No. 2544021 (FIG. 3)

  According to the fixing method described above, in the step (d), since the end portion of the anchor bolt is expanded at the expanded diameter portion, the diameter of the anchor bolt is increased as long as the expanded diameter portion is appropriately formed. It is possible to lock the end portion thus made to the enlarged diameter portion and prevent the anchor bolt from coming off. However, conventionally, there is no simple means for confirming whether or not the enlarged diameter portion is properly formed, and since this confirmation operation has not been performed, the formation failure of the enlarged diameter portion is overlooked. There was a problem that the anchor bolt could not be securely removed.

  The present invention has been made to solve the above-described problem, and an object of the present invention is to provide a tool for confirming diameter expansion, which can easily confirm whether or not the diameter-expanded portion is properly formed. To do.

  In order to solve the above-described problems, the diameter expansion confirmation tool according to the present invention is configured to confirm whether or not the diameter expansion part located at the back of the fixing hole for fixing the anchor bolt is properly formed. A movable part configured to be reciprocally movable in a radial direction of the fixed hole at a position corresponding to the enlarged-diameter part in the fixed hole; A pressing portion that moves at least a part of the movable portion to the space inside the enlarged-diameter portion by pressing and a portion for pressing the movable portion with the pressing portion. And an operation unit for inputting force.

  In this configuration, when the enlarged-diameter portion is appropriately formed, at least a part of the movable portion is enlarged by causing the force to be applied from the pressing portion to the movable portion even if the force input from the operation portion is small. It can be smoothly moved to the space inside the diameter portion. However, when the enlarged diameter portion is not properly formed, the movable portion is caught on the inner surface of the enlarged diameter portion, so that a resistance force that was not appropriate is generated, and the resistance force is transmitted to the operation portion. Become so. Therefore, it is possible to confirm whether or not the enlarged-diameter portion is properly formed by detecting the resistance force in the operation portion (including sensing with a finger). For example, when the operator's hand force is directly input from the operation unit, the operator can instantly feel the state of the enlarged diameter portion from the resistance force transmitted to the operation unit.

  The pressing portion has an inclined surface that is inclined at a predetermined angle with respect to a center line of the fixing hole, and is configured to be capable of reciprocating in the depth direction of the fixing hole, and the pressing portion is fixed. When moving in the depth direction of the hole, at least a part of the movable portion may be pushed by the inclined surface and moved to the space inside the enlarged diameter portion.

  In this configuration, it is possible to apply a pressing force directed radially outward of the fixed hole to the movable portion from the pressing portion moved in the depth direction of the fixed hole, and at least a part of the movable portion is caused by the pressing force. It can be moved to the space inside the enlarged diameter portion.

  A cylindrical tool body that is inserted into the fixed hole; and an operation rod that is arranged in the tool body so as to be movable in an axial direction, and the movable part is a tip part of the tool body Extending in the axial direction of the tool main body, and configured to be elastically deformable in the radial direction of the tool main body, the pressing portion is provided at the tip of the operating rod, and the operating portion is Further, it may be provided at the base end portion of the operation rod.

  In this configuration, a movable part is provided on the tool body, and a pressing part and an operation part are provided on the operation bar. Since the operation bar is arranged inside the tool body, the entire apparatus is configured in a unified manner. be able to.

  The operation unit may include a locking part for locking a human finger. Further, the operation portion has an annular member disposed on the outer peripheral surface of the tool body so as to be movable in the axial direction, and the annular member is inserted through the hole formed in the tool body. It may be fixed to the operation rod. Furthermore, the opening on the base end side of the tool main body may be sealed so that the palm of a person can be pressed against it.

  These configurations are suitable when the operator's hand force is input from the operation unit, and the operator can easily operate the diameter expansion confirmation tool by using fingers and palms. it can.

  An abutting portion that abuts against the bottom of the fixing hole may be formed at the tip of the tool body.

  In this configuration, the tool body can be easily positioned inside the fixed hole by abutting the contact portion with the bottom of the fixed hole, and the movable portion can be accurately positioned at a position corresponding to the enlarged diameter portion. can do.

  According to the diameter expansion confirmation tool of the present invention, when the diameter expansion part is formed in the back part of the fixing hole for fixing the anchor bolt, it is easily confirmed whether or not the diameter expansion part is properly formed. be able to. Moreover, since the structure is simple, it can be manufactured at low cost.

FIG. 1 is a perspective view showing a configuration of a diameter expansion confirmation tool according to the first embodiment of the present invention. FIG. 2 is an exploded front view showing the configuration of the diameter expansion confirmation tool according to the first embodiment of the present invention. FIG. 3 is a perspective view showing a configuration of a main part of the diameter expansion confirmation tool according to the first embodiment of the present invention. FIG. 4 is a front view showing a fixing hole forming step. FIG. 5A is a front view showing a step of forming the enlarged diameter portion, and FIG. 5B is a cross-sectional view showing the enlarged diameter portion formed in the step. FIG. 6A is a front view showing a state in which the diameter expansion confirmation tool according to the first embodiment is inserted into the fixing hole, and FIG. 6B is a state in which the diameter expansion confirmation tool is operated in the fixing hole. FIG. FIG. 7 is a front view showing a state in which the anchor bolt is fixed to the fixing hole. FIG. 8 is a front view showing the configuration of the diameter expansion confirmation tool according to the second embodiment of the present invention. FIG. 9A is a front view showing a state in which the diameter expansion confirmation tool according to the third embodiment is inserted into the fixing hole, and FIG. 9B is a state in which the diameter expansion confirmation tool is operated in the fixing hole. FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(First embodiment)
[Configuration of tool for checking diameter expansion]
FIG. 1 is a perspective view showing the configuration of a diameter expansion confirmation tool 10 according to the first embodiment of the present invention, and FIG. 2 is an exploded front view showing the configuration of the diameter expansion confirmation tool 10. These are perspective views which show the structure of the principal part of the tool 10 for diameter expansion confirmation.

  As shown in FIG. 5, when the enlarged diameter portion 16 is formed in the deep portion of the fixing hole 14 for fixing the anchor bolt 12 (FIG. 7), the enlarged diameter confirmation tool 10 is appropriately set. It is a tool for confirming whether it is formed. Here, the bottom portion 14a of the fixing hole 14 is formed in a substantially conical shape whose diameter is reduced toward the back side, and the enlarged diameter portion 16 is a position slightly away from the bottom portion 14a of the fixing hole 14 toward the opening portion 14b. In, the taper shape which expands as it goes to the back side is formed. The diameter expansion confirmation tool 10 is configured to conform to the shape and size of the fixing hole 14 and the diameter expansion portion 16.

  As shown in FIGS. 1 and 2, the diameter expansion checking tool 10 is moved in the axial direction into the cylindrical tool body 18 inserted into the fixing hole 14 (FIG. 5B) and the inside of the tool body 18. The operation rod 20 arranged as possible, the two movable parts 22 formed at the tip of the tool body 18, and the two contacts formed independently of the movable part 22 at the tip of the tool body 18. A contact portion 24, a pressing portion 26 provided at the distal end portion of the operation rod 20, and an operation portion 28 provided at the proximal end portion of the operation rod 20 are provided. In the tool body 18, the operating rod 20, the movable portion 22, the contact portion 24, and the pressing portion 26, the end portion of the fixed hole 14 located on the bottom portion 14 a (FIG. 5B) side is referred to as “tip portion”. The end located on the opposite side is called the “base end”.

  As shown in FIGS. 1 and 2, the tool body 18 is a cylindrical member made of metal, plastic, or the like. The outer diameter of the tool body 18 is designed to be slightly smaller than the inner diameter of the fixed hole 14. The inner diameter of the main body 18 is designed to be slightly larger than the outer diameter of the operation rod 20. In addition, the thickness of the tool body 18 is designed to be sufficiently thicker than the thickness of the movable portion 22 in order to ensure sufficient strength. In addition, two holes 32 into which pins 30 to be described later are inserted are formed in the base end portion of the tool body 18 so as to have a sufficient length in the axial direction of the tool body 18 and to face each other. On the outer peripheral surface of the base end portion, a groove 36 serving as a “mark line” indicating an appropriate position of an annular member 34 to be described later is formed extending in the circumferential direction (in the present embodiment, the entire circumference). Furthermore, the opening on the base end side of the tool main body 18 is sealed so that the palm of a person can be pressed against, and this sealed portion (hereinafter referred to as “sealed portion”) 38 is formed. It is finished in a spherical shape so that the pressed hand does not hurt.

  As shown in FIG. 3, a cylindrical portion 40 having a straight tube portion 40 a and a tapered portion 40 b is continuously formed in the axial direction at the distal end portion of the tool main body 18. Are divided by four cut lines L extending in the axial direction, so that two movable parts 22 facing each other and two contact parts 24 facing each other are configured. In other words, the two movable parts 22 and the two contact parts 24 constitute a cylindrical part 40 having a straight pipe part 40a and a tapered part 40b. Therefore, the movable portion 22 and the abutting portion 24 are in a mutually reinforcing relationship, thereby reinforcing the movable portion 22 which is difficult to obtain strength structurally.

  The movable part 22 is a substantially rectangular leaf spring formed extending in the axial direction from the tip part of the tool body 18, and at least a part thereof can reciprocate in the radial direction of the fixed hole 14 (in this embodiment, elastic deformation). Possible). The thickness of the movable portion 22 is designed such that the movable portion 22 can be elastically deformed toward the radially outer side of the tool body 18 by the pressing force applied from the pressing portion 26. An inner surface of a portion constituting the tapered portion 40b of the movable portion 22 is an inclined surface 22a pressed by the pressing portion 26, and the inclined surface 26a of the pressing portion 26 is pressed against the inclined surface 22a of the movable portion 22. Accordingly, the movable portion 22 (excluding the base end portion) is moved to the space S inside the enlarged diameter portion 16 (FIG. 5B). In order to realize such movement of the movable portion 22, at least the distal end portion of the movable portion 22 needs to be positioned corresponding to the enlarged diameter portion 16. It is designed to be slightly shorter than the length of the contact portion 24. Furthermore, the maximum outer diameter of the portion constituting the tapered portion 40b of the movable portion 22 is fixed so that at least the tip portion of the movable portion 22 can be quickly moved to the space S inside the enlarged diameter portion 16. It is designed to be sufficiently larger than the maximum outer diameter of the portion constituting the straight pipe portion 40a as long as it does not become larger than the inner diameter of 14.

  The contact portion 24 has a leg portion 24a formed extending in the axial direction from the distal end portion of the tool body 18, and a head portion 24b formed at the distal end portion of the leg portion 24a. Is configured such that the front end surface thereof can come into contact with the bottom portion 14a of the fixing hole 14 (FIG. 5B). Further, the thickness of the head 24b is designed to be thicker than the thickness of the leg 24a, thereby increasing the strength of the head 24b.

  The operating rod 20 is a cylindrical or solid rod-shaped member (solid rod-shaped in this embodiment) made of metal, plastic, or the like, and a pressing portion 26 is integrally formed at the tip of the operating rod 20. In addition, a through hole 20a through which the pin 30 is inserted is formed in the base end portion of the operation rod 20 so as to extend in a direction orthogonal to the axial direction. An operation portion 28 (including the pin 30) is provided on the base end portion.

  As shown in FIG. 3, the pressing portion 26 is a wedge-shaped member that is pulled into the inside of the above-described tubular portion 40 from the distal end side of the tubular portion 40, and the depth direction of the fixing hole 14 together with the operation rod 20. It is configured to be reciprocally movable. As shown in FIG. 2, the pressing portion 26 has two inclined surfaces 26a inclined at a predetermined angle with respect to a center line (not shown) of the fixing hole 14 (FIG. 6), and these inclined surfaces 26a. Is formed in a tapered shape so as to spread from the proximal end side to the distal end side of the pressing portion 26. Then, when the pressing portion 26 is drawn inside the cylindrical portion 40, the two inclined surfaces 26a of the pressing portion 26 are pressed against the two inclined surfaces 22a of the movable portion 22, respectively, and the movable portion 22 is thereby fixed. The movable portion 22 (excluding the base end portion) is pressed toward the radially outer side of the hole 14 and moved to the space S inside the enlarged diameter portion 16.

  The operation portion 28 is a portion for inputting a force for pressing the movable portion 22 by the pressing portion 26, and is arranged on the outer peripheral surface of the tool body 18 so as to be movable in the axial direction as shown in FIG. An annular member 34, a pin 30, and a pin set screw 42 are provided. The annular member 34 is formed in a circular shape (that is, a donut shape) having a hole in the center by metal, plastic, or the like, and the annular member 34 has a through hole 44a into which the pin 30 is inserted and a bottomed hole 44b having a diameter. An internal thread 46 is formed on the inner surface of the end of the through hole 44a on the inlet side. The annular member 34 is fixed to the operation rod 20 through a hole 32 formed in the tool main body 18. That is, the pin 30 is inserted into the through hole 44 a and the bottomed hole 44 b of the annular member 34, the through hole 20 a of the operation rod 20, and the two holes 32 of the tool body 18, so that the annular member 34 is 20 is fixed. Further, the pin 30 is prevented from falling off by screwing the pin set screw 42 into the female screw 46 of the annular member 34.

  In the operation portion 28, the entire outer peripheral portion of the annular member 34 is a locking portion 34 a where a human finger is locked. Therefore, regardless of the position of the operator's hand, the finger can be locked to the locking portion 34a, and high operability can be obtained.

  Note that the overall shape of the operation unit 28 is not limited to an annular shape as in the present embodiment, and may be a rod shape or a protrusion shape, or a finger shape such as a shape having a hole into which a finger is inserted. It may be a special shape that can be easily locked. Moreover, in this embodiment, although the movable part 22 and the contact part 24 are formed 2 each, these numbers are not specifically limited, One or 3 or more may be sufficient. When the number of the movable parts 22 is changed, the shape of the pressing part 26 is appropriately changed so that all the movable parts 22 can be pressed evenly.

[How to use the tool for checking diameter expansion]
As shown in FIG. 7, when fixing the fixing object 52 such as equipment to the foundation 50 such as a concrete frame using the anchor bolt 12, first, as shown in FIG. The fixing hole 14 is formed in the foundation 50 using the drill 54. Subsequently, as illustrated in FIG. 5A, the diameter-expanded portion 16 is formed by expanding the depth of the fixed hole 14 using the diameter-expanding device 56.

  FIG. 5B is a cross-sectional view showing the expanded diameter portion 16 formed in the expanded diameter process. In the diameter expansion step (FIG. 5A), if the diameter expansion portion 16 is not properly formed, the anchor bolt 12 (FIG. 7) cannot be prevented from coming off reliably. It is necessary to confirm whether or not the enlarged diameter portion 16 is properly formed before inserting the anchor bolt 12 into the fixing hole 14. Therefore, in the next step, as shown in FIG. 6, the state of the enlarged diameter portion 16 is inspected using the enlarged diameter confirmation tool 10.

  That is, first, as shown in FIG. 6A, the diameter expansion confirmation tool 10 is inserted into the fixing hole 14, and the tip surface of the head 24 b in the abutting portion 24 is brought into contact with the bottom 14 a of the fixing hole 14. Thus, the entire diameter expansion confirmation tool 10 is positioned inside the fixing hole 14. At this time, the pressing portion 26 formed on the operating rod 20 has not been drawn into the cylindrical portion 40 yet, and the movable portion 22 remains in a natural state (that is, a state where it is not elastically deformed).

  When the positioning of the diameter expansion confirmation tool 10 is completed, the tool body 18 is fixed by bringing the palm into contact with the sealing portion 38 of the tool body 18 as shown in FIG. A finger is locked to the locking portion 34a, and the hand is gripped in this state to move the annular member 34 toward the sealing portion 38 of the tool body 18. Then, the pressing portion 26 formed on the operation rod 20 is moved to the opening portion 14 b side inside the fixing hole 14, and pulled into the cylindrical portion 40. Thereby, the two inclined surfaces 26a of the pressing portion 26 are pressed against the two inclined surfaces 22a of the movable portion 22, and a pressing force is applied from the pressing portion 26 to the movable portion 22 toward the radially outer side of the fixed hole 14, The movable portion 22 (excluding the base end portion) is moved to the space S inside the enlarged diameter portion 16 by the pressing force.

  Here, when the enlarged diameter portion 16 is appropriately formed, even if the force input from the operation portion 28 is small, the movable portion 22 is smoothly moved to the space S inside the enlarged diameter portion 16 by the force. Therefore, the operator does not feel an unnatural resistance force on the fingers until the movable portion 22 is opened and its tip abuts against the inner surface of the enlarged diameter portion 16. On the other hand, when the enlarged diameter portion 16 is not properly formed, the movable portion 22 is caught on the inner surface of the enlarged diameter portion 16, and thus a resistance force that is not appropriate is generated. At an earlier stage, an unnatural resistance force according to the state of the enlarged diameter portion 16 is felt. Therefore, the operator determines whether or not the enlarged diameter portion 16 is properly formed based on the distance that the annular member 34 has moved before the unnatural resistance force is sensed (that is, the distance that the movable portion 22 has moved). Judgment can be made. In the present embodiment, since the groove 36 serving as a “mark line” indicating the appropriate position of the annular member 34 is formed in the tool body 18, the annular member 34 can be smoothly moved to an appropriate position beyond the groove 36. If it is possible, it can be determined that “the enlarged diameter portion 16 is properly formed” and unnatural resistance before the annular member 34 crosses the groove 36 (that is, before reaching the proper position). When the force is sensed, it can be determined that “the enlarged diameter portion 16 is not properly formed”.

  When the inspection of the enlarged diameter portion 16 is completed, the annular member 34 is returned to the original position to restore the movable portion 22 to a natural state, and then the enlarged diameter confirmation tool 10 is pulled out from the fixed hole 14. And when the enlarged diameter part 16 is not formed appropriately, the enlarged diameter part 16 is formed again by the enlarged diameter apparatus 56 (FIG. 5 (A)), and the enlarged diameter part 16 is formed appropriately. As shown in FIG. 7, the anchor bolt 12 is fixed to the fixing hole 14. Thereafter, the object 52 to be fixed is fixed using the anchor bolt 12 and the nut 58 by the same method as in the prior art.

(Second Embodiment)
FIG. 8 is a front view showing the configuration of the diameter expansion confirmation tool 60 according to the second embodiment. The diameter expansion confirmation tool 60 projects the operation rod 20 from the opening 18a on the proximal end side of the tool body 18, and provides an operation portion 62 at the proximal end portion of the operation rod 20, and the outer periphery of the proximal end portion. A groove 64 to be a “mark line” is formed on the surface. Although the shape of the operation part 62 is not specifically limited, In the second embodiment, it is formed in a disk shape.

(Third embodiment)
FIG. 9A is a front view illustrating a state in which the diameter expansion confirmation tool 70 according to the third embodiment is inserted into the fixed hole 14, and FIG. 9B is a diagram illustrating the diameter expansion confirmation tool 70 in the fixed hole 14. It is a front view which shows the state which operated. In the above-described diameter expansion confirmation tools 10 and 60, the movable portion 22 is opened by moving the pressing portion 26 from the bottom portion 14a side of the fixing hole 14 toward the opening portion 14b side, whereas in the third embodiment, In the diameter-enlarging confirmation tool 70, the movable part 22 is opened by moving the movable part 22 from the opening part 14b side of the fixed hole 14 toward the bottom part 14a side. Therefore, in the diameter expansion confirmation tool 70, the base end portion 18b of the tool main body 18 having the movable portion 22 formed at the distal end portion inputs a force for pressing the movable portion 22 (that is, the operator holds it with his hand). It is an “operation unit” for pressing. Further, in the diameter expansion confirmation tool 70, an abutting portion 72 that abuts against the bottom portion 14 a of the fixing hole 14 is formed at the distal end portion of the pressing portion 26, and an operation rod formed integrally with the pressing portion 26. A groove 74 serving as a “mark line” is formed at the base end portion of the 20, and the base end portion protrudes from the opening 18 a on the base end side of the tool main body 18.

  In each of the above-described embodiments, the grooves 36, 64, and 74 are formed as “mark lines”. However, instead of this, protrusions or protrusions may be formed as “mark lines” or simply. A “mark line” may be drawn using paint. Further, the “movable part” only needs to be configured to be reciprocally movable in the radial direction of the fixed hole 14, and instead of the “substantially rectangular leaf spring” described above, for example, “the tool body 18 can freely rotate. A configuration including a plate-like member pivotally supported on the shaft and a restoring coil spring ”may be employed. Furthermore, the “pressing portion” only needs to be configured to be able to press the “movable portion” toward the radially outer side of the fixed hole 14, and instead of the “wedge member having the inclined surface” described above, Other configurations using a “mechanism” or “link mechanism” may be used as the “pressing portion”.

DESCRIPTION OF SYMBOLS 10 ... Diameter expansion confirmation tool 12 ... Anchor bolt 14 ... Fixing hole 16 ... Diameter expansion part 18 ... Tool main body 18b ... Base end part (operation part)
DESCRIPTION OF SYMBOLS 20 ... Operation rod 22 ... Movable part 24 ... Contact part 26 ... Press part 28 ... Operation part 30 ... Pin 34 ... Ring member 36 ... Groove 38 ... Sealing part 40 ... Cylindrical part 50 ... Base 52 ... Fixed object 60 ... Diameter expansion confirmation tool 62 ... Operation part 70 ... Diameter expansion confirmation tool 72 ... Contact part

Claims (7)

A tool for confirming the expansion of diameter for confirming whether or not the expanded-diameter portion located at the back of the fixing hole for fixing the anchor bolt is properly formed,
A movable part configured such that at least a part thereof can reciprocate in the radial direction of the fixed hole at a position corresponding to the enlarged diameter part in the fixed hole;
A pressing part that moves at least a part of the movable part to a space inside the enlarged diameter part by pressing the movable part; and
A tool for confirming a diameter expansion, comprising: an operation unit that is disposed outside the fixed hole and inputs a force for pressing the movable unit by the pressing unit. The pressing portion has an inclined surface that is inclined at a predetermined angle with respect to the center line of the fixed hole, and is configured to be reciprocally movable in the depth direction of the fixed hole.
The at least one part of the said movable part is pushed by the said inclined surface when the said press part is moved to the depth direction of the said fixed hole, and is moved to the space inside the said enlarged diameter part. Tool for confirming diameter expansion. A cylindrical tool main body inserted into the fixing hole, and an operation rod arranged to be movable in the axial direction inside the tool main body,
The movable part is configured to extend in an axial direction of the tool body from a tip part of the tool body and be elastically deformable in a radial direction of the tool body.
The pressing portion is provided at the tip of the operation rod,
The diameter expansion confirmation tool according to claim 2, wherein the operation portion is provided at a base end portion of the operation rod.   The diameter increase confirmation tool according to claim 3, wherein the operation portion includes a locking portion on which a human finger is locked. The operation section has an annular member arranged on the outer peripheral surface of the tool body so as to be movable in the axial direction,
The diameter expansion confirmation tool according to claim 4, wherein the annular member is fixed to the operation rod through a hole formed in the tool body.   The tool for diameter expansion confirmation according to claim 4 or 5, wherein the opening on the base end side of the tool body is sealed so that a palm of a person can be pressed.   The diameter expansion confirmation tool according to any one of claims 3 to 6, wherein a contact portion that is in contact with a bottom portion of the fixing hole is formed at a tip portion of the tool body.

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