JP2013108544A - Bolt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bolt that can be installed without any time and labor and can be repeatedly used.SOLUTION: At a bolt 10A, first the head 17 of a bolt body 11 and then a cylindrical member 12 encapsulating the head 17, a washer 13A and a shaft 15, a washer 13B, and a hexagonal nut 14 are inserted into a bolt hole. When the shaft is rotated anticlockwise by using an engaging part 19, the hexagonal nut 14 moves toward the front of the shaft 15 to press the cylindrical member 12 to the head 17. Thus, the cylindrical member 12 is elastically deformed outward in a diameter direction, the outer peripheral surface 29 of the cylindrical member 12 adheres to the inner peripheral surface of the bolt hole, and the bolt 10A is fixed to the bolt hole.

Description

  The present invention relates to a bolt that is detachably fixed to a bolt hole drilled in a predetermined location of a new structure or an existing structure.

  After the anchor bolt body is inserted into the anchor hole drilled in the mortar layer or the concrete layer of the building, the anchor bolt body is formed from a driving pin having a spiral protrusion at the tip and an anchor bolt body in which a pin hole is formed. There is a pin driving type expansion anchor bolt that expands the open leg portion of the main body and fixes it to the anchor hole by driving a driving pin into the pin hole of the main body (see Patent Document 1).

Japanese Patent Laid-Open No. 2003-27599

  In the pin driving type expansion anchor bolt disclosed in Patent Document 1, after the anchor bolt main body is inserted into the anchor hole, the driving pin is driven into the pin hole, and the open leg portion of the anchor bolt main body is expanded radially outward. For this purpose, a driving pin is required separately from the anchor bolt body, and a driving tool must be prepared separately.In addition, a large force is required to drive the driving pin. Cost. Further, after the driving pin is driven into the pin hole and the anchor bolt main body is fixed to the anchor hole, the anchor bolt main body including the driving pin cannot be removed from the anchor hole and cannot be used repeatedly.

  This pin-in type expansion anchor bolt may cause damage to the mortar layer or concrete layer of the structure due to impact when the pin is driven into the pin hole, and a large noise is generated when the driving pin is driven. However, it may cause noise pollution to the neighborhood. Furthermore, since it is necessary to use a hard material that can withstand the impact at the time of driving as the driving pin, the manufacturing cost of the anchor bolt increases, and the bolt cannot be made inexpensively.

  An object of the present invention is to provide a bolt that can be installed without requiring labor and labor and can be used repeatedly. Another object of the present invention is to provide a bolt that can prevent damage to a structure at the time of installation and can be produced at low cost without generating a large noise.

  The premise of the present invention for solving the above problems is a bolt that is detachably installed in a bolt hole drilled in a predetermined location of a new structure or an existing structure.

  The feature of the present invention based on the above premise is that the bolt extends in the axial direction and has a screw formed on the outer peripheral surface thereof, and is located at the upper end portion of the shaft and extends outward in the radial direction of the shaft. A head portion that is positioned at a lower end portion of the shaft portion, an engagement portion that is used to rotate the shaft portion in one direction or the opposite direction, and a screw portion that is screwed to the shaft portion to A fastening member that can be moved either in the axial direction forward or axially rearward by rotating in one direction or the opposite direction, and between the head and the fastening member extending in the axial direction And an elastically deformable cylindrical member that is detachably inserted into the shaft portion and covers the outer peripheral surface of the shaft portion. When the shaft portion is rotated in one direction by using the fastening member, the tube member moves to the head while the fastening member moves forward in the axial direction of the shaft portion. Selfish pressed, thereby that the cylinder member is elastically deformed radially outward, lies in the bolt is secured to the bolt holes.

  As an example of the present invention, in the bolt, when the shaft portion is rotated in the opposite direction using the engaging portion, the fastening member moves rearward in the axial direction of the shaft portion, whereby the cylindrical member is elastic inward in the radial direction. The bolt is deformed and the bolt is released from the bolt hole.

  As another example of the present invention, the cylindrical member is formed with a plurality of cuts extending in the axial direction with a predetermined distance in the circumferential direction of the cylindrical member.

  As another example of the present invention, on the outer peripheral surface of the cylindrical member, a plurality of convex portions extending in the axial direction and spaced apart by a predetermined dimension in the circumferential direction of the cylindrical member, and a plurality of convex portions positioned between the convex portions and extending in the axial direction. Are formed.

  As another example of the present invention, on the outer peripheral surface of the cylindrical member, a plurality of convex portions extending in the circumferential direction around the cylindrical member with a predetermined distance in the axial direction and a plurality of convex portions positioned between the convex portions and extending in the circumferential direction. Are formed.

  As another example of the present invention, a plurality of convex portions are formed on the outer peripheral surface of the cylindrical member so as to be spaced apart from each other by a predetermined dimension in the circumferential direction and the axial direction of the cylindrical member.

  As another example of the present invention, the inner diameter of the cylindrical member is substantially the same as the outer diameter of the shaft portion or 0.1 to 2 mm larger than the outer diameter of the shaft portion.

  As another example of the present invention, the outer diameter of the cylindrical member is substantially the same as the inner diameter of the bolt hole or 0.2 to 4 mm smaller than the inner diameter of the bolt hole.

  As another example of this invention, the length dimension in the axial direction of a cylinder member exists in the range of 30 to 70% of the length dimension of a shaft part.

  As another example of the present invention, the cylindrical member is a rubber tube made of a rubber material or a cloth-wrapped rubber tube made of a rubber material.

  According to the bolt of the present invention, after inserting the bolt into the bolt hole, for example, a socket wrench bit of an impact driver (electric tool) is fitted into the engaging portion, the driver switch is turned on, and the shaft portion is turned in one direction. , The fastening member moves toward the head in the axial direction of the shaft portion, and presses the tubular member toward the head, whereby the tubular member is elastically deformed radially outward, so that the outer periphery of the tubular member Since the surface is in close contact with the inner peripheral surface of the bolt hole and the bolt is fixed to the bolt hole, the bolt can be fixed to the bolt hole with a simple operation and can be installed without requiring labor and labor. it can. The bolt can be installed in the bolt hole by fitting the socket wrench bit of the impact driver into the engaging part and rotating the shaft part in one direction by the screwdriver, preventing damage to the structure during installation In addition, no loud noise is generated and no noise pollution is caused. Further, the bolt only includes a fastening member screwed to the shaft portion and a cylindrical member removably inserted into the shaft portion, and does not require a driving pin, so that the bolt can be made inexpensively. The bolt is elastically deformed outward in the radial direction so that the outer peripheral surface of the cylindrical member is firmly attached to the inner peripheral surface of the bolt hole, and the bolt can be firmly fixed to the bolt hole. Even if a strong external force is applied to the shaft part by attaching another machine tool to the shaft part of the bolt exposed from the bolt hole and performing the predetermined work, the bolt does not come off the bolt hole, and the predetermined work Can be done safely.

  When the shaft part is rotated in the opposite direction using the engaging part, the fastening member moves rearward in the axial direction of the shaft part, whereby the cylindrical member is elastically deformed radially inward, and the fixing to the bolt hole is released. For example, the bolt to be fitted is fitted with the socket wrench bit of an impact driver in the engaging part, the switch of the driver is turned on and the shaft part is rotated in the opposite direction, so that the fastening member moves rearward in the axial direction of the shaft part. As a result, the cylindrical member is elastically deformed radially inward, the adhesion between the outer peripheral surface of the cylindrical member and the inner peripheral surface of the bolt hole is released, and the fixing to the bolt hole is released. The bolt can be removed from the bolt hole with a simple operation without need. Since the bolt removed from the bolt hole can be installed again in the bolt hole, the bolt can be used repeatedly, and the waste of the bolt can be eliminated.

  A bolt in which a plurality of cuts extending in the axial direction and spaced apart by a predetermined distance around the cylindrical member are formed in the cylindrical member. When the cylindrical member is pressed toward the head of the bolt by the fastening member, the bolts Since the portion of the cylindrical member extending in between is easily and orderly elastically deformed radially outward, the portion of the cylindrical member is securely and firmly adhered to the inner peripheral surface of the bolt hole, and most of the outer peripheral surface of the cylindrical member is bolted The inner peripheral surface of the hole can be brought into close contact, and the bolt can be firmly fixed to the bolt hole. Since the bolt can be firmly fixed to the bolt hole, it is assumed that a strong external force is applied to the shaft part by attaching other machinery to the shaft part of the bolt exposed from the bolt hole and performing a predetermined work. However, the bolt does not come out of the bolt hole, and the predetermined work can be performed safely.

  A bolt in which a plurality of convex portions extending in the axial direction and spaced apart from each other by a predetermined distance around the cylindrical member and a plurality of concave portions extending in the axial direction between the convex portions are formed on the outer peripheral surface of the cylindrical member is fastened. When the cylindrical member is pressed toward the head of the bolt by the member, the cylindrical member elastically deforms radially outward, and the outer peripheral surface of the cylindrical member including the convex portion or the concave portion together with the convex portion is within the bolt hole. Not only does it firmly and securely adhere to the peripheral surface, but also the convex portions improve the degree of adhesion of the outer peripheral surface of the cylindrical member to the inner peripheral surface of the bolt hole, so that the bolt can be firmly fixed to the bolt hole. it can. Since the bolt can be firmly fixed to the bolt hole, it is assumed that a strong external force is applied to the shaft part by attaching other machinery to the shaft part of the bolt exposed from the bolt hole and performing a predetermined work. However, the bolt does not come out of the bolt hole, and the predetermined work can be performed safely.

  A bolt in which a plurality of convex portions extending in the circumferential direction of the cylindrical member with a predetermined distance in the axial direction and a plurality of concave portions extending between the convex portions and extending in the circumferential direction are formed on the outer peripheral surface of the cylindrical member is fastened. When the cylindrical member is pressed toward the head of the bolt by the member, the cylindrical member elastically deforms radially outward, and the outer peripheral surface of the cylindrical member including the convex portion or the concave portion together with the convex portion is within the bolt hole. Not only does it firmly and securely adhere to the peripheral surface, but also the convex portions improve the degree of adhesion of the outer peripheral surface of the cylindrical member to the inner peripheral surface of the bolt hole, so that the bolt can be firmly fixed to the bolt hole. it can. Since the bolt can be firmly fixed to the bolt hole, it is assumed that a strong external force is applied to the shaft part by attaching other machinery to the shaft part of the bolt exposed from the bolt hole and performing a predetermined work. However, the bolt does not come out of the bolt hole, and the predetermined work can be performed safely.

  A bolt in which a plurality of convex portions that are spaced apart from each other by a predetermined dimension in the circumferential direction and the axial direction of the cylindrical member are formed on the outer peripheral surface of the cylindrical member, when the cylindrical member is pressed toward the head of the bolt by the fastening member, While the cylindrical member is elastically deformed radially outward, the convex portion or the outer peripheral surface of the cylindrical member including the convex portion is not only firmly and securely adhered to the inner peripheral surface of the bolt hole, Since the adhesion degree of the outer peripheral surface of the cylindrical member with respect to the inner peripheral surface is improved, the bolt can be firmly fixed to the bolt hole. Since the bolt can be firmly fixed to the bolt hole, it is assumed that a strong external force is applied to the shaft part by attaching other machinery to the shaft part of the bolt exposed from the bolt hole and performing a predetermined work. However, the bolt does not come out of the bolt hole, and the predetermined work can be performed safely.

  The bolt whose inner diameter of the cylindrical member is substantially the same as the outer diameter of the shaft portion or 0.1 to 2 mm larger than the outer diameter of the shaft portion can be slidably rotated with respect to the cylindrical member. As a result, the fastening member moves axially rearward or axially rearward of the shaft portion, and the cylindrical member elastically deforms radially outward or radially inward, so that the bolt can be securely fixed to the bolt hole. The fixing of the bolt to the bolt hole can be reliably released.

  The bolt whose outer diameter is substantially the same as the inner diameter of the bolt hole or smaller by 0.2 to 4 mm than the inner diameter of the bolt hole, the head of the bolt, the cylindrical member, and the fastening member can be inserted into the bolt hole. The shaft part of the bolt including the head can be rotated with respect to the bolt hole, whereby the fastening member moves axially rearward or axially rearward of the shaft part, and the cylindrical member is radially outward or radially inward. Therefore, the bolt can be securely fixed to the bolt hole, and the bolt can be securely released from the bolt hole.

  Since the length of the cylinder member in the axial direction is in the range of 30 to 70% of the length of the bolt shaft, the length of the cylinder member is in the above range. When the cylinder member is pressed toward the head, the outer circumferential surface of the cylindrical member having the length is firmly adhered to the inner circumferential surface of the bolt hole while elastically deforming radially outward. On the other hand, the bolt can be firmly fixed. Since the bolt can be firmly fixed to the bolt hole, it is assumed that a strong external force is applied to the shaft part by attaching other machinery to the shaft part of the bolt exposed from the bolt hole and performing a predetermined work. However, the bolt does not come out of the bolt hole, and the predetermined work can be performed safely.

  A bolt that is a rubber tube made of a rubber-based material or a cloth-wrapped rubber tube made of a rubber-based material uses a rubber tube or a cloth-wrapped rubber tube with a large friction coefficient, so that When the member is pressed toward the head of the bolt, the cylindrical member is elastically deformed radially outward, and the outer peripheral surface of the cylindrical member is firmly and securely adhered to the inner peripheral surface of the bolt hole. The bolt can be firmly fixed to the hole. Since the bolt can be firmly fixed to the bolt hole, it is assumed that a strong external force is applied to the shaft part by attaching other machinery to the shaft part of the bolt exposed from the bolt hole and performing a predetermined work. However, the bolt does not come out of the bolt hole, and the predetermined work can be performed safely.

The perspective view of the volt | bolt shown as an example. The exploded perspective view of a volt | bolt. FIG. 2 is an end view taken along line AA in FIG. 1. The figure explaining the installation procedure of a volt | bolt. The figure explaining the installation procedure of the volt | bolt following FIG. The figure explaining the installation procedure of the volt | bolt following FIG. The figure explaining the installation procedure of the volt | bolt following FIG. The figure explaining the installation procedure of the volt | bolt following FIG. The perspective view of the volt | bolt shown as another example. The side view of the volt | bolt shown in the state fixed to the volt | bolt hole. FIG. 11 is an end view taken along line BB in FIG. 10. The perspective view of the volt | bolt shown as another example. The side view of the volt | bolt shown in the state fixed to the volt | bolt hole. FIG. 14 is an end view taken along the line CC of FIG. 13. The perspective view of the volt | bolt shown as another example. The side view of the volt | bolt shown in the state fixed to the volt | bolt hole. The DD line end view of FIG. The perspective view of the volt | bolt shown as another example. The side view of the volt | bolt shown in the state fixed to the volt | bolt hole. The EE line | wire end view of FIG.

  The details of the bolt according to the present invention will be described with reference to the accompanying drawings such as FIG. 1 which is a perspective view of the bolt 10A as an example. 2 is an exploded perspective view of the bolt 10A, and FIG. 3 is an end view taken along line AA of FIG. 1 and 3, the axial direction is indicated by an arrow X (excluding FIG. 2), the radial direction is indicated by an arrow Y, and the peripheral direction is indicated by an arrow Z. The bolt 10 </ b> A is detachably installed in a bolt hole 26 drilled at a predetermined location of a new structure or an existing structure.

  The bolt 10A is formed of a bolt body 11, an elastically deformable cylinder member 12, washers 13A and 13B, and a hexagon nut 14 (fastening member). In the bolt 10A, both of the washers 13A and 13B can be omitted, or either one of the washers 13A and 13B can be omitted. The bolt body 11 includes a shaft portion 15 formed in a rod shape that is long in the axial direction, a head portion 17 positioned at the upper end portion 16 of the shaft portion 15, and an engagement portion 19 positioned at the lower end portion 18 of the shaft portion 15. Is formed. As shown in FIG. 2, a cylindrical member 12, washers 13 </ b> A and 13 </ b> B, and a hexagon bolt 14 are provided on the shaft portion 15 of the bolt main body 11 from the head 17 side, such as a washer 13 </ b> A → cylinder member 12 → washer 13 </ b> B → hexagon bolt 14. Installed in order.

  The bolt body 11 is made of steel, but may be made of metal such as stainless steel, aluminum alloy, titanium alloy, or resin in addition to steel. A male screw 22 (screw) is formed on the outer peripheral surface 21 of the intermediate portion 20 of the shaft portion 15. The head portion 17 is formed in a regular hexagonal shape and extends outward in the radial direction of the shaft portion 15. In addition, there is no limitation in particular in the shape of the head 17, The head 17 may be shape | molded by the column shape or the other polygonal column shape, and may be shape | molded by flat plate circle shape or flat plate polygonal shape.

  The engaging portion 19 is shaped into a regular hexagon. The engaging portion 19 may be formed with a hexagonal hole with which the hexagonal bar spanner is engaged. The engaging portion 19 engages a socket wrench bit 28 of an impact driver 27 (electric tool) (see FIG. 6) described later and turns on the driver 27 to turn the shaft portion 15 in the counterclockwise direction ( Used when rotating in one direction) or clockwise direction (opposite direction). When the engaging portion 19 is a hexagonal hole, the socket wrench adapter (socket wrench hexagon bar) of the impact driver 27 is fitted, and the shaft portion 15 is set in either the counterclockwise direction or the clockwise direction. Rotate.

  The hexagon nut 14 is detachably screwed to the male screw 22 of the shaft portion 15 of the bolt body 11. The hexagon nut 14 is made of steel, but may be made of metal such as stainless steel, aluminum alloy, titanium alloy, or resin. The hexagon nut 14 moves forward in the axial direction (moves from the side of the engaging portion 19 toward the head 17) by rotating the shaft portion 15 (including the head portion 17) counterclockwise. 15 (including the head 17) is moved in the axial direction by rotating clockwise (including the head 17) (moved from the side of the head 17 toward the engaging portion 19). In addition, although the hexagon nut 14 is used as a fastening member, in addition to the hexagon nut 14, a cylindrical nut and other polygonal column nuts can also be used.

  The cylindrical member 12 is formed into a hollow cylindrical shape that is long in the axial direction, and is disposed between the head portion 17 (washer 13A) and the hexagon nut 14 (washer 13B) of the bolt body 11. The cylindrical member 12 is inserted into the central portion 20 of the shaft portion 15 of the bolt main body 11 and covers the entire outer peripheral surface 21 of the shaft portion 15. The washer 13 </ b> A is disposed between the head 17 of the bolt main body 11 and the upper end 24 of the cylindrical member 12. The washer 13 </ b> B is disposed between the lower end 23 of the cylindrical member 12 and the hex nut 14. In the bolt 10 </ b> A, about half of the central portion 20 of the shaft portion 15 is exposed from the cylindrical member 12.

  For the cylindrical member 12, a rubber tube made of a rubber material or a cloth-wrapped rubber tube made of a rubber material is used. Examples of rubber materials include natural rubber (NR), isoprene rubber (IR), butadiene rubber (BR), styrene butadiene rubber (SBR), nitrile butadiene rubber (NBR), chloroprene rubber (CR), ethylene propylene rubber (EPM, EPDM), chlorosulfonated polyethylene (CSM), urethane rubber (U), acrylic rubber (ANM, ACM), silicon rubber (Q) and the like can be used.

  FIG. 4 is a diagram for explaining the installation procedure (installation method) of the bolt 10A, and FIG. 5 is a diagram for explaining the installation procedure of the bolt 10A continued from FIG. 6 is a diagram for explaining the installation procedure of the bolt 10A continued from FIG. 5, and FIG. 7 is a diagram for explaining the installation procedure of the bolt 10A continued from FIG. FIG. 8 is a view for explaining the installation procedure of the bolt 10A continued from FIG.

  The installation procedure of the bolt 10A will be described with reference to these drawings as follows. As shown in FIG. 1, the hexagon nut 14 is screwed onto the male screw 22 of the shaft portion 15 and the upper end 24 of the tubular member 12 is the washer before the bolt 10A is installed (before fixing) in the bolt hole 26. The washer 13B is in contact with the lower end 23 of the cylindrical member 12 and the nut 14 is in contact with the washer 13B, but the nut 14 is moving the cylindrical member 12 toward the head 17 through 13A. The cylindrical member 12 is not pressed and is not elastically deformed radially outward.

  In the description of the installation procedure of the bolt 10A, it is assumed that the bolt 10A is installed on the mortar layer 25 or the concrete layer 25 (concrete frame) at a predetermined location on the wall of the new structure or the existing structure. The bolt 10A can be installed not only on a wall but also on a pillar, beam, slab, or ceiling. In addition to the mortar layer 25 and the concrete layer 25 at those locations, the bolt 10A is a base material that can be drilled with bolt holes 26. If available, it can also be installed on wood, metal, and plastic that make up the structure.

  First, a cylindrical bolt hole 26 (anchor hole) is drilled in the mortar layer 25 and the concrete layer 25 at the location of the structure where the bolt 10A is to be installed, using a vibration drill (power tool) (not shown). The depth dimension of the bolt hole 26 is not particularly limited, but the bolt 10A in the state of FIG. 1 has a depth dimension equal to or greater than the length plus at least the head 17 and the cylindrical member 12 (the head of the bolt 10A). It is necessary that the depth is greater than or equal to the depth dimension in which the portion 17 and the cylindrical member 12 can be inserted. After drilling the bolt hole 26, the bolt 10 </ b> A is inserted into the bolt hole 26. As shown in FIG. 4, the washer 13 </ b> A, the cylindrical member 12, the washer 13 </ b> B, and the hexagon nut 14 are inserted into the bolt hole 26 in this order from the head 17 starting with the head 17 of the bolt body 11.

  When the washers 13A and 13B are omitted, the cylindrical member 12 and the hexagon nut 14 are inserted in this order from the head 17. When the washer 13A is omitted, the cylindrical member 12, the washer 13B, and the hexagon nut 14 are inserted in this order from the head 17. When the washer 13B is omitted, the washer 13A, the cylindrical member 12, and the hexagon nut 14 are inserted in this order from the head 17.

  As shown in FIG. 5, the bolt 10 </ b> A inserted into the bolt hole 26 comes into contact with the bottom surface of the bolt hole 26, and the cylindrical member 12 and the hexagon nut 14 (washer 13 </ b> A, 13B) and a part of the intermediate portion 20 of the shaft portion 15 are located inside the bolt hole 26. In the state where the bolt 10 </ b> A is inserted into the bolt hole 26, at least the head portion 17 and the cylindrical member 12 of the bolt 10 </ b> A may be positioned inside the bolt hole 26.

  After the bolt 10A is inserted into the bolt hole 26, as shown in FIG. 6, the socket wrench bit 28 of the impact driver 27 (electric tool) is fitted into the engaging portion 19 of the bolt body 11, and the driver 27 is turned on. Then, the shaft portion 15 of the bolt 10A is rotated in the counterclockwise direction (one direction). When the shaft portion 15 (including the head portion 17) is rotated in the counterclockwise direction, the hexagonal nut 14 gradually moves forward on the male screw 22 of the shaft portion 15 in the axial direction as indicated by an arrow X1 in FIG. It moves (moves toward the head 17 from the engagement portion 19 side), and the nut 14 gradually presses the tubular member 12 toward the head 17.

  The cylindrical member 12 pressed toward the head 17 of the bolt body 11 by the hexagon nut 14 is elastically deformed radially outward as indicated by an arrow Y1 in FIG. 6, and its outer peripheral surface 29 is radially outward. Swells gradually. When the cylindrical member 12 is elastically deformed, the outer peripheral surface 29 comes into contact with the inner peripheral surface 30 of the bolt hole 26, and in this state, the cylindrical member 12 is fixed to the bolt hole 26, and free rotation of the cylindrical member 12 is restricted. At the same time, a hexagon nut 14 that is in close contact with the lower end 23 of the cylindrical member 12 via the washer 13 is fixed to the cylindrical member 12, so that the so-called nut 14 in which the nut 14 rotates together with the shaft portion 15 is eliminated.

  When the shaft portion 15 of the bolt main body 11 is further rotated counterclockwise by the impact driver 27, the hexagon nut 14 further moves the shaft portion 15 forward in the axial direction, and as shown in FIG. Is further elastically deformed outward in the radial direction, most of the outer peripheral surface 29 of the cylindrical member 12 is in close contact with the inner peripheral surface 30 of the bolt hole 26, and the bolt 10 </ b> A is fixed to the bolt hole 26. The hexagon nut 14 is firmly fixed to the cylindrical member 12, and the portion near the upper end 24 and the portion near the lower end 23 of the cylindrical member 12 are firmly attached to the shaft portion 15 of the bolt main body 11. 15 (including the head 17) is fixed.

  The shaft portion 15 of the bolt main body 11 is sufficiently rotated counterclockwise to bring the outer peripheral surface 29 of the cylindrical member 12 into close contact with the inner peripheral surface 30 of the bolt hole 26, and then the socket wrench bit 28 of the impact driver 27 is attached to the bolt main body. As shown in FIG. 8, the bolt 10 </ b> A is firmly fixed to the bolt hole 26 (the mortar layer 25 and the concrete layer 25). In the state of FIG. 8, another machine tool is attached to the shaft portion 15 of the bolt body 11 exposed from the bolt hole 26 to perform a predetermined operation.

  In order to remove the bolt 10A from the bolt hole 26 from the state shown in FIG. 8, the socket wrench bit 28 of the impact driver 27 is again fitted into the engaging portion 19 of the bolt main body 11, the switch of the driver 27 is turned ON, and the bolt main body 11 is turned on. Is rotated in the clockwise direction (opposite direction). When the shaft portion 15 (including the head portion 17) is rotated in the clockwise direction, the hexagon nut 14 moves rearward in the axial direction on the male screw 22 of the shaft portion 15 (from the head portion 17 side to the engaging portion 19). And the pressing of the nut 14 against the cylindrical member 12 is gradually released.

  When the pressing of the cylindrical member 12 by the hexagon nut 14 is released, the cylindrical member 12 is elastically deformed radially inward, the outer peripheral surface 29 of the cylindrical member 12 is recessed radially inward, and the inner peripheral surface of the bolt hole 26 The tight contact of the outer peripheral surface 29 of the cylindrical member 12 with respect to 30 is released, the fixing of the bolt 10A to the bolt hole 26 is released, and the state returns to the state of FIG. The socket wrench bit 28 of the impact driver 27 is extracted from the engaging portion 19 of the bolt body 11, and the bolt 10 </ b> A in the state of FIG. 5 is removed from the bolt hole 26. The removed bolt 10A is used by being installed in the bolt hole 26 which has been drilled by the above procedure.

  The inner diameter S1 (see FIG. 3) of the cylindrical member 12 is approximately the same as the outer diameter S2 of the shaft portion 15 (the outer diameter of the male screw 22) of the bolt body 11 or 0.1 to 2 mm than the outer diameter S2 of the shaft portion 15. large. When the inner diameter S1 of the cylindrical member 12 is smaller than the outer diameter S2 of the shaft portion 15, the inner peripheral surface of the cylindrical member 12 is in close contact with the outer peripheral surface of the shaft portion 15, the cylindrical member 12 is fixed to the shaft portion 15, and the bolt 10A. Only the shaft portion 15 cannot be rotated separately from the cylindrical member 12 at the time of installation. When the inner diameter S1 of the cylindrical member 12 exceeds 2 mm with respect to the outer diameter S2 of the shaft portion 15, in the installed state in which the bolt 10A is fixed to the bolt hole 26, the portion near the upper end 24 and the portion near the lower end 23 of the cylindrical member 12 May not sufficiently adhere to the outer peripheral surface of the shaft portion 15, the shaft portion 15 may not be fixed to the cylindrical member 12, and the shaft portion 15 may inadvertently float in the installed state of the bolt 10 </ b> A with respect to the bolt hole 26. In the bolt 10A, since the inner diameter S1 of the cylindrical member 12 is in the above range with respect to the outer diameter S2 of the shaft portion 15, the shaft portion 15 of the bolt body 11 can be rotated separately from the cylindrical member 12, and the bolt 10A. In the installation state in which is fixed to the bolt hole 26, the shaft portion 15 is firmly fixed to the cylindrical member 12, and inadvertent play of the shaft portion 15 can be prevented.

  The outer diameter S3 (see FIG. 3) of the cylindrical member 12 is substantially the same as the inner diameter S4 (see FIG. 4) of the bolt hole 26 or 0.2 to 4 mm smaller than the inner diameter S4 of the bolt hole 26. If the outer diameter S3 of the cylindrical member 12 is larger than the inner diameter S4 of the bolt hole 26, the cylindrical member 12 cannot be inserted into the bolt hole 26. When the outer diameter S3 of the cylindrical member 12 exceeds 4 mm with respect to the inner diameter S4 of the bolt hole 26, the cylindrical member 12 is pressed by the hexagon nut 14 and the cylindrical member 12 is elastically deformed radially outward. In the installed state, the outer peripheral surface 29 of the cylindrical member 12 may not be sufficiently adhered to the inner peripheral surface 30 of the bolt hole 26, and the bolt 10 </ b> A may not be firmly fixed to the bolt hole 26. Since the outer diameter S3 of the cylindrical member 12 is within the above range with respect to the inner diameter S4 of the bolt hole 26, the bolt 10A can be inserted into the bolt hole 26 and the bolt 10A can be inserted into the bolt hole 26. In the installation state fixed to the bolt hole 26, the outer peripheral surface 29 of the cylindrical member 12 is sufficiently adhered to the inner peripheral surface 30 of the bolt hole 26, and the bolt 10 </ b> A can be firmly fixed to the bolt hole 26.

  The length dimension T1 (see FIG. 2) in the axial direction of the cylindrical member 12 is in the range of 30 to 70%, preferably in the range of 40 to 60% of the length dimension T2 of the shaft portion 15. When the length dimension T1 of the cylindrical member 12 is less than 30% of the length dimension T2 of the shaft portion 15, the outer periphery of the cylindrical member 12 with respect to the inner peripheral surface 30 of the bolt hole 26 in the installed state in which the bolt 10A is fixed to the bolt hole 26. The contact area of the surface 29 is small, and the bolt 10 </ b> A may not be firmly fixed to the bolt hole 26. When the length dimension T1 of the tubular member 12 exceeds 70% of the length dimension T2 of the shaft portion 15, the hex nut 14 presses the tubular member 12 toward the head 17 depending on the hardness of the tubular member 12. Sometimes, the cylindrical member 12 cannot be elastically deformed radially outward. Since the length dimension T1 of the cylindrical member 12 is in the above range with respect to the length dimension T2 of the shaft portion 15, the bolt 10A is cylindrical when the cylindrical member 12 is pressed toward the head 17 by the hexagon nut 14. The member 12 can be reliably elastically deformed radially outward and the outer peripheral surface 29 of the cylindrical member 12 with respect to the inner peripheral surface 40 of the bolt hole 26 in the installed state in which the bolt 10A is fixed to the bolt hole 26. Can be firmly attached to the bolt hole 26 with a sufficient area.

  The thickness dimension S5 between the inner peripheral surface and the outer peripheral surface 29 of the cylindrical member 12 is in the range of 30 to 150%, preferably in the range of 50 to 100%, of the outer diameter S2 of the shaft portion 15 of the bolt body 11. . If the thickness dimension S5 of the cylindrical member 12 is less than 30% of the outer diameter S2 of the shaft portion 15, the strength of the cylindrical member 12 is reduced, and in the installed state where the bolt 10A is fixed to the bolt hole 26, the shaft portion 15 has another machine. When the work is performed with the appliance attached, the cylinder member 12 may be inadvertently damaged, and the work may not be performed safely. When the thickness dimension S5 of the cylindrical member 12 exceeds 150% of the outer diameter S2 of the shaft portion 14, depending on the hardness of the cylindrical member 12, the hexagon nut 14 presses the cylindrical member 12 toward the head 17 depending on the hardness. In some cases, the cylindrical member 12 cannot be sufficiently elastically deformed radially outward. In the bolt 10A, since the thickness dimension S5 of the cylindrical member 12 is in the above range with respect to the outer diameter S2 of the shaft portion 15, the cylindrical member 12 can be sufficiently elastically deformed radially outward by the hexagon nut 14. The bolt 10A can be firmly fixed to the bolt hole 26, and the cylindrical member 12 is not inadvertently damaged, and the operation can be performed safely.

  The bolt 10 </ b> A has an impact on the engaging portion 19 after inserting the cylindrical member 12 covering the head portion 17 and the shaft portion 15 of the bolt body 11 and the hexagon nut 14 (including washers 13 </ b> A and 13 </ b> B) into the bolt hole 26. The socket wrench bit 28 of the driver 27 is fitted, the switch of the driver 27 is turned on, and the shaft portion 15 is rotated in the counterclockwise direction (one direction). The outer circumferential surface 29 of the cylindrical member 12 is brought into close contact with the inner circumferential surface 30 of the bolt hole 26 by elastically deforming the cylindrical member 12 outward in the radial direction thereof, and the bolt 10A is brought into contact with the bolt hole 26. Since it is fixed, the bolt 10 </ b> A can be fixed to the bolt hole 26 by a simple operation, and can be installed without requiring labor and labor.

  The bolt 10A is installed in the bolt hole 26 by fitting the socket wrench bit 28 of the impact driver 27 to the engaging portion 19 of the bolt body 11 and rotating the shaft portion 15 counterclockwise by the driver 27. Therefore, the mortar layer 25 and the concrete layer 25 of the structure can be prevented from being damaged at the time of installation, and a large noise is not generated and noise pollution is not caused.

  The bolt 10A only includes the hexagon nut 14 screwed to the shaft portion 15 of the bolt body 11 and the cylindrical member 12 removably inserted into the shaft portion 15, and does not require a driving pin. Can be made. The bolt 10 </ b> A elastically deforms the cylindrical member 12 outward in the radial direction so that the outer peripheral surface 29 of the cylindrical member 12 is firmly attached to the inner peripheral surface 30 of the bolt hole 26, and the bolt 10 </ b> A is attached to the bolt hole 26. Even if a strong external force is applied to the shaft portion 15 by attaching another mechanical device to the shaft portion 15 of the bolt main body 11 exposed from the bolt hole 26 and performing a predetermined work, the bolt 15 can be firmly fixed. 10A does not come off from the bolt hole 26, and a predetermined operation can be performed safely.

  In the bolt 10 </ b> A, when the shaft portion 15 is rotated in the clockwise direction (opposite direction) using the engagement portion 19, the hexagon nut 14 moves rearward in the axial direction of the shaft portion 15. Since it is elastically deformed inward in the direction and the fixing to the bolt hole 26 is released, the bolt 10A can be removed from the bolt hole 26 by a simple operation without requiring labor and labor. Since the bolt 10A removed from the bolt hole 26 can be installed again in the bolt hole 26, it can be used repeatedly, and the waste of the bolt 10A can be eliminated.

  FIG. 9 is a perspective view of a bolt 10 </ b> B shown as another example, and FIG. 10 is a side view of the bolt 10 </ b> B shown in a state of being fixed to the bolt hole 26. FIG. 11 is an end view taken along line BB of FIG. In FIG. 9, the axial direction is indicated by an arrow X, the radial direction is indicated by an arrow Y, and the peripheral direction is indicated by an arrow Z. The bolt 10B is different from that shown in FIG. 1 in that a plurality of cuts 31 extending in the axial direction are formed in the cylindrical member 12 with a predetermined distance in the circumferential direction. In addition, since the other structure of the volt | bolt 10B is the same as those of the volt | bolt 10A of FIG. 1, while attaching | subjecting the same code | symbol as FIG. 1, and using the description of FIG. Detailed description is omitted.

  The bolt 10B is formed of a bolt body 11, an elastically deformable cylinder member 12, washers 13A and 13B, and a hexagon nut 14 (fastening member). The bolt body 11 includes a shaft portion 15 formed in a rod shape that is long in the axial direction, a head portion 17 positioned at the upper end portion 16 of the shaft portion 15, and an engagement portion 19 positioned at the lower end portion 18 of the shaft portion 15. Is formed. The shaft portion 15, the head portion 17, the engaging portion 19, the washers 13A and 13B, and the hexagon nut 14 are the same as those of the bolt 10A in FIG.

  The cylindrical member 12 is formed into a hollow cylindrical shape that is long in the axial direction, and is disposed between the head portion 17 (washer 13A) and the hexagon nut 14 (washer 13B) of the bolt body 11. The cylindrical member 12 is inserted into the central portion 20 of the shaft portion 15 of the bolt main body 11 and covers the entire outer peripheral surface 21 of the shaft portion 15. As the cylindrical member 12, a rubber tube made of a rubber-based material or a cloth-wrapped rubber tube made of a rubber-based material is used as in FIG. The cylindrical member 12 is formed with a plurality of cuts 31 extending in the axial direction at equal intervals (predetermined dimensions apart) in the circumferential direction. The notch 31 is formed between the upper end 24 and the lower end 23 of the cylindrical member 12, leaving a portion near the upper and lower ends 23, 24 slightly, and penetrates between the inner and outer peripheral surfaces of the cylindrical member 12.

  Since the installation procedure of the bolt 10B with respect to the bolt hole 26 is the same as that of the bolt 10A in FIG. 1, the installation procedure of the bolt 10A described based on FIGS. Thus, the description of the installation procedure of the bolt 10B is omitted. Moreover, since the removal procedure of the volt | bolt 10B from the volt | bolt hole 26 is the same as that of the volt | bolt 10A of FIG. 1, while using FIG. 4-8, removal of the volt | bolt 10A demonstrated based on FIGS. The description of the procedure for removing the bolt 10B is omitted by using the procedure.

  As shown in FIG. 9, the hexagon nut 14 is screwed onto the male screw 22 of the shaft portion 15 and the upper end 24 of the cylindrical member 12 is the washer before the bolt 10B is installed in the bolt hole 26 (before fixing). The washer 13 abuts against the lower end 23 of the tubular member 12 and the nut 14 abuts against the washer 13, but the nut 14 moves the tubular member 12 toward the head 17. The cylindrical member 12 is not pressed and is not elastically deformed radially outward.

  In the installed state in which the bolt 10B is fixed to the bolt hole 26, as shown in FIGS. 10 and 11, the cylindrical member 12 is elastically deformed radially outward, and the outer peripheral surface 29 of the cylindrical member 12 bulges radially outward. Most of the outer peripheral surface 29 is in close contact with the inner peripheral surface 30 of the bolt hole 26, and the cylindrical member 12 is separated in the circumferential direction at the notch 31, and the shaft portion 15 of the bolt main body 11 is exposed at the notch 31. The bolt 10B is firmly fixed to the bolt hole 26 (the mortar layer 25 or the concrete layer 25). In the state shown in FIG. 10, another mechanical device is attached to the shaft portion 15 of the bolt main body 11 exposed from the bolt hole 26. Do work.

  In the bolt 10B, as in the bolt 10A in FIG. 1, the inner diameter S1 of the cylindrical member 12 (referring to FIG. 3) is substantially the same as the outer diameter S2 of the shaft portion 15 of the bolt body 11 (the outer diameter of the male screw 22) or the shaft portion. It is 0.1 to 2 mm larger than 15 outer diameter S2. In the bolt 10B, since the inner diameter S1 of the cylindrical member 12 is within the above range with respect to the outer diameter S2 of the shaft portion 15, the shaft portion 15 of the bolt main body 11 can be rotated separately from the cylindrical member 12, and the bolt 10B. In the installation state in which is fixed to the bolt hole 26, the shaft portion 15 is firmly fixed to the cylindrical member 12, and inadvertent play of the shaft portion 15 can be prevented.

  In the bolt 10B, similarly to the bolt 10A in FIG. 1, the outer diameter S3 (supported in FIG. 3) of the cylindrical member 12 is substantially the same as the inner diameter S4 of the bolt hole 26 (supported in FIG. 4) or 0 than the inner diameter S4 of the bolt hole 26. .2-4mm smaller. Since the outer diameter S3 of the cylindrical member 12 is within the above range with respect to the inner diameter S4 of the bolt hole 26, the bolt 10B can be inserted into the bolt hole 26 and the bolt 10B can be inserted into the bolt hole 26. In the installation state fixed to the bolt hole 26, the outer peripheral surface 29 of the cylindrical member 12 is sufficiently adhered to the inner peripheral surface 30 of the bolt hole 26, and the bolt 10 </ b> B can be firmly fixed to the bolt hole 26.

  In the bolt 10B, similarly to the bolt 10A in FIG. 1, the length dimension T1 (indicated by FIG. 2) in the axial direction of the cylindrical member 12 is in the range of 30 to 70% of the length dimension T2 of the shaft portion 15, preferably 40 It is in the range of ˜60%. Since the length dimension T1 of the cylindrical member 12 is in the above range with respect to the length dimension T2 of the shaft portion 15, the bolt 10B is cylindrical when the cylindrical member 12 is pressed toward the head 17 by the hexagon nut 14. The member 12 can be reliably elastically deformed radially outward and the outer peripheral surface 29 of the cylindrical member 12 with respect to the inner peripheral surface 40 of the bolt hole 26 in an installed state in which the bolt 10B is fixed to the bolt hole 26. Can be firmly attached in a sufficient area, and the bolt 10B can be firmly fixed to the bolt hole 26.

  In the bolt 10 </ b> B, the thickness dimension S <b> 5 between the inner peripheral surface and the outer peripheral surface 29 of the tubular member 12 is in the range of 30 to 150% of the outer diameter S <b> 2 of the shaft portion 15 of the bolt body 11, as in the bolt 10 </ b> A of FIG. Preferably, it exists in the range of 50 to 100%. In the bolt 10B, since the thickness dimension S5 of the cylindrical member 12 is in the above range with respect to the outer diameter S2 of the shaft portion 15, the cylindrical member 12 can be sufficiently elastically deformed radially outward by the hexagon nut 14. The bolt 10B can be firmly fixed to the bolt hole 26, and the cylindrical member 12 is not inadvertently damaged, and the operation can be performed safely.

  The bolt 10B has the following effects in addition to the effects it has in FIG. In the bolt 10B, when the cylindrical member 12 is pressed toward the head 17 of the bolt main body 11 by the hexagon nut 14, the portion of the cylindrical member 12 extending between the notches 31 is easily and orderly elastically outward in the radial direction. Since it deforms, the portion of the cylindrical member 12 is firmly and firmly in close contact with the inner peripheral surface 30 of the bolt hole 26, and most of the outer peripheral surface 29 of the cylindrical member 12 is in close contact with the inner peripheral surface 30 of the bolt hole 26. The bolt 10B can be firmly fixed to the bolt hole 26.

  FIG. 12 is a perspective view of a bolt 10 </ b> C shown as another example, and FIG. 13 is a side view of the bolt 10 </ b> C shown in a state of being fixed to the bolt hole 26. 14 is an end view taken along the line CC of FIG. In FIG. 12, the axial direction is indicated by an arrow X, the radial direction is indicated by an arrow Y, and the peripheral direction is indicated by an arrow Z. The bolt 10C is different from that shown in FIG. 1 in that a plurality of protrusions 32 extending in the axial direction and spaced apart from the outer peripheral surface 29 of the cylindrical member 12 in the circumferential direction are positioned between the protrusions 32 and the shaft. A plurality of recesses 33 extending in the direction are formed. In addition, since the other structure of the volt | bolt 10C is the same as that of the volt | bolt 10A of FIG. 1, while attaching | subjecting the same code | symbol as FIG. 1, and using the description of FIG. Detailed description is omitted.

  The bolt 10 </ b> C is formed of a bolt main body 11, an elastically deformable cylinder member 12, washers 13 </ b> A and 13 </ b> B, and a hexagon nut 14 (fastening member). The bolt body 11 includes a shaft portion 15 formed in a rod shape that is long in the axial direction, a head portion 17 positioned at the upper end portion 16 of the shaft portion 15, and an engagement portion 19 positioned at the lower end portion 18 of the shaft portion 15. Is formed. The shaft portion 15, the head portion 17, the engaging portion 19, the washers 13A and 13B, and the hexagon nut 14 are the same as those of the bolt 10A in FIG.

  The cylindrical member 12 is formed into a hollow cylindrical shape that is long in the axial direction, and is disposed between the head portion 17 (washer 13A) and the hexagon nut 14 (washer 13B) of the bolt body 11. The cylindrical member 12 is inserted into the central portion 20 of the shaft portion 15 of the bolt main body 11 and covers the entire outer peripheral surface 21 of the shaft portion 15. As the cylindrical member 12, a rubber tube made of a rubber-based material or a cloth-wrapped rubber tube made of a rubber-based material is used as in FIG. A plurality of convex portions 32 are formed on the outer peripheral surface 29 of the cylindrical member 12 at regular intervals in the circumferential direction (predetermined dimensions apart) and extending in the axial direction from the upper end 24 toward the lower end 23. A plurality of recesses 33 are formed which are positioned at and extend in the axial direction. The convex portion 32 protrudes outward in the radial direction from the outer peripheral surface 29 of the cylindrical member 12. The convex portion 32 and the concave portion 33 reach the upper end 24 and the lower end 23 of the cylindrical member 12.

  Since the installation procedure of the bolt 10C with respect to the bolt hole 26 is the same as that of the bolt 10A in FIG. 1, the installation procedure of the bolt 10A described with reference to FIGS. Thus, the description of the installation procedure of the bolt 10C is omitted. Moreover, since the removal procedure of the bolt 10C from the bolt hole 26 is the same as that of the bolt 10A of FIG. 1, while using FIGS. 4-8, removal of the bolt 10A demonstrated based on FIGS. The description of the procedure for removing the bolt 10C is omitted by using the procedure.

  As shown in FIG. 12, the hexagon nut 14 is screwed onto the male screw 22 of the shaft portion 15 and the upper end 24 of the tubular member 12 is the washer before the bolt 10C is installed (before fixing) in the bolt hole 26. The washer 13B is in contact with the lower end 23 of the cylindrical member 12 and the nut 14 is in contact with the washer 13B, but the nut 14 is moving the cylindrical member 12 toward the head 17 through 13A. The cylindrical member 12 is not pressed and is not elastically deformed radially outward.

  In the installation state in which the bolt 10C is fixed to the bolt hole 26, as shown in FIGS. 13 and 14, the cylindrical member 12 is elastically deformed radially outward, and the outer peripheral surface 29 of the cylindrical member 12 swells radially outward. Most of the outer peripheral surface 29 of the cylindrical member 12 including the convex portion 32 of the cylindrical member 12 or the concave portion 33 together with the convex portion 32 is firmly adhered to the inner peripheral surface 30 of the bolt hole 26. The bolt 10C is firmly fixed to the bolt hole 26 (the mortar layer 25 or the concrete layer 25). In the state shown in FIG. 13, another mechanical device is attached to the shaft portion 15 of the bolt main body 11 exposed from the bolt hole 26 to obtain a predetermined value. Do work.

  In the bolt 10C, as in the bolt 10A in FIG. 1, the inner diameter S1 of the cylindrical member 12 (with the aid of FIG. 3) is substantially the same as the outer diameter S2 of the shaft portion 15 of the bolt body 11 (the outer diameter of the male screw 22) or the shaft portion. It is 0.1 to 2 mm larger than 15 outer diameter S2. Since the inner diameter S1 of the cylindrical member 12 is within the above range with respect to the outer diameter S2 of the shaft portion 15, the bolt 10C can rotate the shaft portion 15 of the bolt body 11 separately from the cylindrical member 12, and the bolt 10C. In the installation state in which is fixed to the bolt hole 26, the shaft portion 15 is firmly fixed to the cylindrical member 12, and inadvertent play of the shaft portion 15 can be prevented.

  In the bolt 10C, as with the bolt 10A in FIG. 1, the outer diameter S3 (including FIG. 3) including the convex portion 32 of the cylindrical member 12 is substantially the same as the inner diameter S4 (in FIG. 4) of the bolt hole 26 or 0.2-4 mm smaller than the inner diameter S4. Since the outer diameter S3 including the convex portion 32 of the cylindrical member 12 is in the above range with respect to the inner diameter S4 of the bolt hole 26, the bolt 10C can be inserted into the bolt hole 26 with the bolt 10C mounted with the cylindrical member 12. In addition, in the installation state in which the bolt 10C is fixed to the bolt hole 26, the outer peripheral surface 29 of the cylindrical member 12 including the convex portion 32 of the cylindrical member 12 or the concave portion 33 together with the convex portion 32 is sufficiently on the inner peripheral surface 30 of the bolt hole 26. The bolts 10C can be firmly fixed to the bolt holes 26.

  In the bolt 10C, similarly to the bolt 10A in FIG. 1, the length T1 (supported in FIG. 2) in the axial direction of the tubular member 12 is in the range of 30 to 70% of the length T2 of the shaft portion 15, preferably 40 It is in the range of ˜60%. Since the length dimension T1 of the cylindrical member 12 is in the above range with respect to the length dimension T2 of the shaft portion 15, the bolt 10C is cylindrical when the cylindrical member 12 is pressed toward the head 17 by the hexagon nut 14. The member 12 can be reliably elastically deformed radially outward, and the outer peripheral surface 29 of the cylindrical member 12 can be made with respect to the inner peripheral surface 40 of the bolt hole 26 in the installed state where the bolt 10C is fixed to the bolt hole 26. Can be firmly attached in a sufficient area, and the bolt 10 </ b> C can be firmly fixed to the bolt hole 26.

  In the bolt 10 </ b> C, the thickness dimension S <b> 5 (excluding the convex portion 32) between the inner peripheral surface and the outer peripheral surface 29 of the cylindrical member 12 is the outer diameter of the shaft portion 15 of the bolt main body 11, as in the bolt 10 </ b> A of FIG. 1. It is in the range of 30 to 150% of S2, preferably in the range of 50 to 100%. Since the thickness dimension S5 of the cylindrical member 12 is within the above range with respect to the outer diameter S2 of the shaft portion 15, the bolt 10C can sufficiently elastically deform the cylindrical member 12 radially outward by the hexagon nut 14. The bolt 10C can be firmly fixed to the bolt hole 26, and the cylindrical member 12 is not inadvertently damaged, and the operation can be performed safely.

  The bolt 10C has the following effects in addition to the effects it has in FIG. When the cylindrical member 12 is pressed toward the head portion 17 of the bolt main body 11 by the hexagon nut 14, the bolt 10 </ b> C is elastically deformed radially outward with the convex portions 32 or the convex portions 32. The outer peripheral surface 29 of the cylindrical member 12 including the concave portion 33 not only firmly and securely adheres to the inner peripheral surface 30 of the bolt hole 26, but the outer periphery of the cylindrical member 12 with respect to the inner peripheral surface 30 of the bolt hole 26 by these convex portions 32. Since the close contact degree of the surface 29 is improved, the bolt 10 </ b> C can be firmly fixed to the bolt hole 26.

  FIG. 15 is a perspective view of a bolt 10 </ b> D shown as another example, and FIG. 16 is a side view of the bolt 10 </ b> D shown fixed to the bolt hole 26. FIG. 17 is an end view taken along line DD of FIG. In FIG. 15, the axial direction is indicated by an arrow X, the radial direction is indicated by an arrow Y, and the peripheral direction is indicated by an arrow Z. This bolt 10D is different from that shown in FIG. 1 in that a plurality of convex portions 34 extending in the circumferential direction are spaced apart from the outer peripheral surface 29 of the cylindrical member 12 by a predetermined distance in the axial direction, A plurality of recesses 35 extending in the direction are formed. In addition, since the other structure of the volt | bolt 10D is the same as that of the volt | bolt 10A of FIG. 1, while attaching | subjecting the same code | symbol as FIG. 1, and using the description of FIG. Detailed description is omitted.

  The bolt 10D is formed of a bolt body 11, an elastically deformable cylinder member 12, washers 13A and 13B, and a hexagon nut 14 (fastening member). The bolt body 11 includes a shaft portion 15 formed in a rod shape that is long in the axial direction, a head portion 17 positioned at the upper end portion 16 of the shaft portion 15, and an engagement portion 19 positioned at the lower end portion 18 of the shaft portion 15. Is formed. The shaft portion 15, the head portion 17, the engaging portion 19, the washers 13A and 13B, and the hexagon nut 14 are the same as those of the bolt 10A in FIG.

  The cylindrical member 12 is formed into a hollow cylindrical shape that is long in the axial direction, and is disposed between the head portion 17 (washer 13A) and the hexagon nut 14 (washer 13B) of the bolt body 11. The cylindrical member 12 is inserted into the central portion 20 of the shaft portion 15 of the bolt main body 11 and covers the entire outer peripheral surface 21 of the shaft portion 15. As the cylindrical member 12, a rubber tube made of a rubber-based material or a cloth-wrapped rubber tube made of a rubber-based material is used as in FIG. On the outer peripheral surface 29 of the cylindrical member 12, a plurality of convex portions 34 that are spaced apart at equal intervals (predetermined dimensions apart) in the axial direction and that extend in the circumferential direction are formed, and a plurality of convex portions 34 that are located between the convex portions 34 and extend in the circumferential direction are formed. The recess 35 is formed. The convex portion 34 protrudes radially outward from the outer peripheral surface 29 of the cylindrical member 12. The convex portion 34 and the concave portion 35 are formed on the entire circumference in the direction around the cylindrical member 12.

  Since the installation procedure of the bolt 10D with respect to the bolt hole 26 is the same as that of the bolt 10A in FIG. 1, the installation procedure of the bolt 10A described with reference to FIGS. Thus, the description of the installation procedure of the bolt 10D is omitted. Moreover, since the removal procedure of the bolt 10D from the bolt hole 26 is the same as that of the bolt 10A of FIG. 1, while using FIGS. 4-8, removal of the bolt 10A demonstrated based on FIGS. The description of the procedure for removing the bolt 10D is omitted by using the procedure.

  As shown in FIG. 15, the hexagon nut 14 is screwed into the male screw 22 of the shaft portion 15 and the upper end 24 of the cylindrical member 12 is the washer before the bolt 10D is installed (before fixing) in the bolt hole 26. The washer 13B is in contact with the lower end 23 of the cylindrical member 12 and the nut 14 is in contact with the washer 13B, but the nut 14 is moving the cylindrical member 12 toward the head 17 through 13A. The cylindrical member 12 is not pressed and is not elastically deformed radially outward.

  In the installed state in which the bolt 10D is fixed to the bolt hole 26, as shown in FIGS. 16 and 17, the cylindrical member 12 is elastically deformed radially outward, and the outer peripheral surface 29 of the cylindrical member 12 swells radially outward. Most of the outer peripheral surface 29 of the cylindrical member 12 including the concave portion 35 together with the convex portion 34 or the convex portion 34 of the cylindrical member 12 is firmly attached to the inner peripheral surface 30 of the bolt hole 26. The bolt 10D is firmly fixed to the bolt hole 26 (the mortar layer 25 or the concrete layer 25), and in the state of FIG. 16, another mechanical device is attached to the shaft portion 15 of the bolt body 11 exposed from the bolt hole 26 to obtain a predetermined Do work.

  In the bolt 10D, as in the bolt 10A in FIG. 1, the inner diameter S1 of the cylindrical member 12 (referring to FIG. 3) is substantially the same as the outer diameter S2 of the shaft portion 15 of the bolt body 11 (the outer diameter of the male screw 22) or the shaft portion. It is 0.1 to 2 mm larger than 15 outer diameter S2. In the bolt 10D, since the inner diameter S1 of the cylindrical member 12 is in the above range with respect to the outer diameter S2 of the shaft portion 15, the shaft portion 15 of the bolt body 11 can be rotated separately from the cylindrical member 12, and the bolt 10D. In the installation state in which is fixed to the bolt hole 26, the shaft portion 15 is firmly fixed to the cylindrical member 12, and inadvertent play of the shaft portion 15 can be prevented.

  In the bolt 10D, similarly to the bolt 10A of FIG. 1, the outer diameter S3 including the convex portion 34 of the cylindrical member 12 (supported in FIG. 3) is substantially the same as the inner diameter S4 of the bolt hole 26 (supported in FIG. 4). 0.2-4 mm smaller than the inner diameter S4. Since the bolt 10D has the outer diameter S3 including the convex portion 34 of the cylindrical member 12 within the above range with respect to the inner diameter S4 of the bolt hole 26, the bolt 10D fitted with the cylindrical member 12 can be inserted into the bolt hole 26. In addition, in the installed state in which the bolt 10D is fixed to the bolt hole 26, the outer peripheral surface 29 of the cylindrical member 12 including the convex portion 34 of the cylindrical member 12 or the concave portion 35 together with the convex portion 34 is sufficiently on the inner peripheral surface 30 of the bolt hole 26. The bolts 10 </ b> D can be firmly fixed to the bolt holes 26.

  In the bolt 10D, similarly to the bolt 10A in FIG. 1, the length dimension T1 in the axial direction of the cylindrical member 12 (supported in FIG. 2) is in the range of 30 to 70% of the length dimension T2 of the shaft portion 15, preferably 40 It is in the range of ˜60%. Since the length dimension T1 of the cylindrical member 12 is in the above range with respect to the length dimension T2 of the shaft portion 15, the bolt 10D has a cylindrical shape when the cylindrical member 12 is pressed toward the head 17 by the hexagon nut 14. The member 12 can be reliably elastically deformed radially outward and the outer peripheral surface 29 of the cylindrical member 12 with respect to the inner peripheral surface 40 of the bolt hole 26 in the installed state in which the bolt 10D is fixed to the bolt hole 26. Can be firmly attached to the bolt hole 26 with a sufficient area.

  In the bolt 10D, similarly to the bolt 10A of FIG. 1, the thickness dimension S5 (not including the convex portion 34) between the inner peripheral surface and the outer peripheral surface 29 of the cylindrical member 12 is the outer diameter of the shaft portion 15 of the bolt main body 11. It is in the range of 30 to 150% of S2, preferably in the range of 50 to 100%. In the bolt 10D, since the thickness dimension S5 of the cylindrical member 12 is within the above range with respect to the outer diameter S2 of the shaft portion 15, the cylindrical member 12 can be sufficiently elastically deformed radially outward by the hexagon nut 14. The bolt 10 </ b> D can be firmly fixed to the bolt hole 26, and the cylindrical member 12 is not inadvertently damaged, and the operation can be performed safely.

  The bolt 10D has the following effects in addition to the effects it has in FIG. When the cylindrical member 12 is pressed toward the head 17 of the bolt main body 11 by the hexagon nut 14, the bolt 10 </ b> D is elastically deformed radially outward with the convex portions 34 or the convex portions 34. The outer peripheral surface 29 of the cylindrical member 12 including the concave portion 35 not only firmly and securely adheres to the inner peripheral surface 30 of the bolt hole 26, but the outer periphery of the cylindrical member 12 with respect to the inner peripheral surface 30 of the bolt hole 26 by these convex portions 34. Since the close contact degree of the surface 29 is improved, the bolt 10 </ b> D can be firmly fixed to the bolt hole 26.

  18 is a perspective view of a bolt 10E shown as another example, and FIG. 19 is a side view of the bolt 10E shown in a state of being fixed to the bolt hole 26. FIG. 20 is an end view taken along line EE of FIG. In FIG. 18, the axial direction is indicated by an arrow X, the radial direction is indicated by an arrow Y, and the peripheral direction is indicated by an arrow Z. The bolt 10E is different from that shown in FIG. 1 in that a plurality of convex portions 36 are formed on the outer peripheral surface 29 of the cylindrical member 12 so as to be spaced apart from each other by a predetermined dimension in the circumferential direction and the axial direction. In addition, since the other structure of the volt | bolt 10E is the same as that of the volt | bolt 10A of FIG. 1, while attaching | subjecting the same code | symbol as FIG. 1, and using the description of FIG. Detailed description is omitted.

  The bolt 10E is formed of a bolt body 11, an elastically deformable cylinder member 12, washers 13A and 13B, and a hexagon nut 14 (fastening member). The bolt body 11 includes a shaft portion 15 formed in a rod shape that is long in the axial direction, a head portion 17 positioned at the upper end portion 16 of the shaft portion 15, and an engagement portion 19 positioned at the lower end portion 18 of the shaft portion 15. Is formed. The shaft portion 15, the head portion 17, the engaging portion 19, the washers 13A and 13B, and the hexagon nut 14 are the same as those of the bolt 10A in FIG.

  The cylindrical member 12 is formed into a hollow cylindrical shape that is long in the axial direction, and is disposed between the head portion 17 (washer 13A) and the hexagon nut 14 (washer 13B) of the bolt body 11. The cylindrical member 12 is inserted into the central portion 20 of the shaft portion 15 of the bolt main body 11 and covers the entire outer peripheral surface 21 of the shaft portion 15. As the cylindrical member 12, a rubber tube made of a rubber-based material or a cloth-wrapped rubber tube made of a rubber-based material is used as in FIG. A plurality of convex portions 36 are formed on the outer peripheral surface 29 of the cylindrical member 12 so as to be equally spaced apart (predetermined dimensions apart) in the circumferential direction and equally spaced apart (predetermined dimensions away) in the axial direction. The convex portions 36 protrude from the outer peripheral surface 29 of the cylindrical member 12 radially outward.

  Since the installation procedure of the bolt 10E with respect to the bolt hole 26 is the same as that of the bolt 10A of FIG. 1, while using FIGS. 4-8, the installation procedure of the bolt 10A demonstrated based on FIGS. 4-8 is used. Thus, the description of the installation procedure of the bolt 10E is omitted. Moreover, since the removal procedure of the bolt 10E from the bolt hole 26 is the same as that of the bolt 10A of FIG. 1, while using FIGS. 4-8, removal of the bolt 10A demonstrated based on FIGS. The description of the procedure for removing the bolt 10E is omitted by using the procedure.

  As shown in FIG. 18, the hexagon nut 14 is screwed onto the male screw 22 of the shaft portion 15 and the upper end 24 of the tubular member 12 is the washer before the bolt 10E is installed (before fixing) in the bolt hole 26. The washer 13B is in contact with the lower end 23 of the cylindrical member 12 and the nut 14 is in contact with the washer 13B, but the nut 14 is moving the cylindrical member 12 toward the head 17 through 13A. The cylindrical member 12 is not pressed and is not elastically deformed radially outward.

  In the installed state in which the bolt 10E is fixed to the bolt hole 26, as shown in FIGS. 19 and 20, the cylindrical member 12 is elastically deformed radially outward, and the outer peripheral surface of the cylindrical member 12 swells radially outward. Most of the outer peripheral surface 29 of the cylindrical member 12 including the convex portion 36 or the convex portion 36 of the member 12 is in close contact with the inner peripheral surface 30 of the bolt hole 26. The bolt 10E is firmly fixed to the bolt hole 26 (the mortar layer 25 and the concrete layer 25), and in the state of FIG. 19, another mechanical device is attached to the shaft portion 15 of the bolt main body 11 exposed from the bolt hole 26 to obtain a predetermined Do work.

  In the bolt 10E, similarly to the bolt 10A in FIG. 1, the inner diameter S1 (supported in FIG. 3) of the cylindrical member 12 is substantially the same as the outer diameter S2 of the shaft portion 15 of the bolt body 11 (the outer diameter of the male screw 22) or the shaft portion. It is 0.1 to 2 mm larger than 15 outer diameter S2. In the bolt 10E, since the inner diameter S1 of the cylindrical member 12 is in the above range with respect to the outer diameter S2 of the shaft portion 15, the shaft portion 15 of the bolt body 11 can be rotated separately from the cylindrical member 12, and the bolt 10E. In the installation state in which is fixed to the bolt hole 26, the shaft portion 15 is firmly fixed to the cylindrical member 12, and inadvertent play of the shaft portion 15 can be prevented.

  In the bolt 10E, similarly to the bolt 10A in FIG. 1, the outer diameter S3 including the convex portion 36 of the cylindrical member 12 (supported in FIG. 3) is substantially the same as the inner diameter S4 of the bolt hole 26 (supported in FIG. 4). 0.2-4 mm smaller than the inner diameter S4. Since the bolt 10E has the outer diameter S3 including the convex portion 36 of the cylindrical member 12 within the above range with respect to the inner diameter S4 of the bolt hole 26, the bolt 10E fitted with the cylindrical member 12 can be inserted into the bolt hole 26. In addition, in the installation state in which the bolt 10E is fixed to the bolt hole 26, the outer peripheral surface 29 of the cylindrical member 12 including the convex portion 36 or the convex portion 36 of the cylindrical member 12 is sufficiently in close contact with the inner peripheral surface 30 of the bolt hole 26, The bolt 10E can be firmly fixed to the bolt hole 26.

  In the bolt 10E, similarly to the bolt 10A in FIG. 1, the length dimension T1 in the axial direction of the cylindrical member 12 (supported in FIG. 2) is in the range of 30 to 70% of the length dimension T2 of the shaft portion 15, preferably 40 It is in the range of ˜60%. Since the length dimension T1 of the cylindrical member 12 is in the above range with respect to the length dimension T2 of the shaft portion 15, the bolt 10E is cylindrical when the cylindrical member 12 is pressed toward the head 17 by the hexagon nut 14. The member 12 can be reliably elastically deformed radially outward and the outer peripheral surface 29 of the cylindrical member 12 with respect to the inner peripheral surface 40 of the bolt hole 26 in the installed state in which the bolt 10D is fixed to the bolt hole 26. Can be firmly attached to the bolt hole 26 with a sufficient area.

  In the bolt 10E, similarly to the bolt 10A in FIG. 1, the thickness dimension S5 (not including the convex portion 36) between the inner peripheral surface and the outer peripheral surface 29 of the cylindrical member 12 is the outer diameter of the shaft portion 15 of the bolt main body 11. It is in the range of 30 to 150% of S2, preferably in the range of 50 to 100%. In the bolt 10E, since the thickness dimension S5 of the cylindrical member 12 is within the above range with respect to the outer diameter S2 of the shaft portion 15, the cylindrical member 12 can be sufficiently elastically deformed radially outward by the hexagon nut 14. The bolt 10E can be firmly fixed to the bolt hole 26, and the cylindrical member 12 is not inadvertently damaged, and the operation can be performed safely.

  The bolt 10E has the following effects in addition to the effects it has in FIG. When the cylindrical member 12 is pressed toward the head portion 17 of the bolt main body 11 by the hexagon nut 14, the bolt 10E causes the convex portion 36 or the convex portion 36 to be deformed while the cylindrical member 12 is elastically deformed radially outward. The outer peripheral surface 29 of the cylindrical member 12 that is included not only firmly and securely adheres to the inner peripheral surface 30 of the bolt hole 26, but also the outer peripheral surface 29 of the cylindrical member 12 with respect to the inner peripheral surface 30 of the bolt hole 26 by these convex portions 36. Since the close contact degree is improved, the bolt 10E can be firmly fixed to the bolt hole 26.

10A bolt 10B bolt 10C bolt 10D bolt 10E bolt 11 bolt body 12 cylinder member 13A washer 13B washer 14 hex nut (fastening member)
DESCRIPTION OF SYMBOLS 15 Shaft part 16 Upper end part 17 Head 18 Lower end part 19 Engagement part 20 Middle part 21 Outer peripheral surface 22 Male screw (screw)
29 outer peripheral surface 30 inner peripheral surface 31 cut 32 convex portion 33 concave portion 34 convex portion 35 concave portion 36 convex portion

Claims (10)

In a bolt that is detachably installed in a bolt hole drilled in a predetermined location of a new structure or an existing structure,
The bolt extends in the axial direction and has a shaft formed with a screw on its outer peripheral surface, a head located at the upper end portion of the shaft and extending radially outward of the shaft, An engaging portion that is located at the lower end portion of the shaft portion and is used to rotate the shaft portion in one direction or the opposite direction; and screwed to the shaft portion so that the shaft portion is in one direction. A fastening member that can move to either the axial front or the axial rear of the shaft by rotating in any of the opposite directions; and the head and the fastening member that extend in the axial direction. An elastically deformable tube member that is disposed between and is detachably inserted into the shaft portion and envelops the outer peripheral surface of the shaft portion,
In the bolt, when the shaft is rotated in one direction using the engaging portion after the bolt is inserted into the bolt hole, the fastening member moves in the axial direction of the shaft while moving the shaft. The bolt is fixed to the bolt hole by pressing the cylindrical member toward the head, whereby the cylindrical member is elastically deformed radially outward.   In the bolt, when the shaft portion is rotated in the opposite direction using the engagement portion, the fastening member moves rearward in the axial direction of the shaft portion, whereby the cylindrical member is elastic inward in the radial direction. The bolt according to claim 1, wherein the bolt is deformed and the fixing of the bolt to the bolt hole is released.   The bolt according to claim 1 or 2, wherein the cylindrical member is formed with a plurality of notches extending in the axial direction with a predetermined distance in the circumferential direction of the cylindrical member.   Formed on the outer peripheral surface of the cylindrical member are a plurality of convex portions extending in the axial direction and spaced apart by a predetermined dimension around the cylindrical member, and a plurality of concave portions extending between the convex portions and extending in the axial direction. The bolt according to claim 1 or 2, wherein the bolt is provided.   On the outer peripheral surface of the cylindrical member, a plurality of convex portions extending in the circumferential direction around the cylindrical member with a predetermined distance in the axial direction, and a plurality of concave portions extending between the convex portions and extending in the circumferential direction are formed. The bolt according to claim 1 or 2, wherein the bolt is provided.   3. The bolt according to claim 1, wherein a plurality of convex portions that are spaced apart from each other by a predetermined dimension in a circumferential direction and an axial direction of the cylindrical member are formed on the outer peripheral surface of the cylindrical member.   The bolt according to any one of claims 1 to 6, wherein an inner diameter of the cylindrical member is substantially the same as an outer diameter of the shaft portion or 0.1 to 2 mm larger than an outer diameter of the shaft portion.   The bolt according to any one of claims 1 to 7, wherein an outer diameter of the cylindrical member is substantially the same as an inner diameter of the bolt hole or 0.2 to 4 mm smaller than an inner diameter of the bolt hole.   The bolt according to any one of claims 1 to 8, wherein a length dimension of the cylindrical member in an axial direction is in a range of 30 to 70% of a length dimension of the shaft portion.   The bolt according to any one of claims 1 to 9, wherein the cylindrical member is a rubber tube made of a rubber-based material or a cloth-wrapped rubber tube made of a rubber-based material.

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