JP2013022692A - Pullout tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pullout tool capable of pulling out any of pullout objects differed in size.SOLUTION: The pullout tool 1 includes: a grasping mechanism 2 for grasping a pullout object that is a fixing pin 5 of an anchor bolt 4; and a transmission mechanism 3 for transmitting a pullout force to the pullout object through the grasping mechanism 2. The grasping mechanism 2 has a grip portion 222 which presses and grips the outer periphery of the pullout object and a moving mechanism which moves the grip portion 222. The transmission mechanism 3 has a screw body 31 connected to the grasping mechanism 2, a nut 32 screwed to the screw body 31, and a support 33 supporting the grasping mechanism 2 through the screw body 31 and nut 32.

Description

  The present invention relates to a pulling tool, and more particularly, to a pulling tool that pulls out each of a fixing pin inserted through an anchor bolt and an anchor bolt from the foundation.

  Conventionally, it is known that anchors are fixed to a foundation using anchor bolts. The anchor bolt has an insertion hole through which the fixing pin passes through the shaft center. The anchor bolt has its base embedded in a hole provided in the foundation. And when a fixing pin is penetrated by an anchor bolt, the base part of the anchor bolt expands and it is fixed to a foundation.

  When moving a fixture etc. and removing the anchor bolt currently fixed to the foundation, the anchor bolt was cut | disconnected along the construction surface of the foundation. However, since an electric cutter or the like is used for cutting the anchor bolt, a large noise is generated. For this reason, it is not easy to cut the anchor bolt in hospitals where noise generation is not allowed. Furthermore, since the anchor bolt is cut along the foundation construction surface, the construction surface may be damaged. Moreover, the chips after cutting the anchor bolts were scattered on the construction surface.

  Then, the apparatus which extracts from a foundation, without cutting | disconnecting an anchor bolt is known (for example, refer patent document 1). In the apparatus described in Patent Document 1, first, the fixing pin inserted through the anchor bolt is completely scraped off using a drill blade. The shavings of the fixed pin scraped off by the drill blade are held by a guide that covers the periphery of the drill blade (see, for example, paragraph 0018). Thereby, the shavings of the fixing pin are prevented from being scattered on the construction surface.

  After the fixing pin is completely scraped off using a drill, the extraction tool is used to extract the anchor bolt. The extraction tool includes an attachment screwed to the male screw provided on the tip side surface of the anchor bolt, a screw rod connected to the attachment, a support base screwed to the screw rod, and supporting the attachment and the screw rod. It has.

  After the attachment is screwed into the anchor bolt, the screw body rotates about its axis by an external force. Thereby, the screw body moves in the extraction direction with respect to the support base. And the attachment connected to the screw body is moved in the extraction direction in the same manner, thereby moving the anchor bolt in the extraction direction.

Japanese Utility Model Publication No. 6-20766

  However, in the apparatus described in Patent Document 1, since a drill blade is used for removing the fixing pin, there is a possibility that a large noise is generated. Further, since the drill blade that removes the fixing pin and the device that removes the anchor bolt are separate bodies, the device has become larger.

  In order not to generate noise and to increase the size of the apparatus, an apparatus that can extract both the fixing pin and the anchor bolt as an object to be extracted is preferable. However, in the apparatus of Patent Document 1, since the attachment needs to be screwed to the anchor bolt, the diameter of the attachment cannot be made variable, and the fixing pin having a size different from that of the anchor bolt cannot be pulled out. It was.

  In view of such circumstances, an object of the present invention is to provide a drawing tool that pulls out any of the drawing objects having different sizes.

  The pulling tool according to the present invention includes a gripping mechanism for gripping a pulling target object, and a transmission mechanism for transmitting a pulling force to the pulling target object via the gripping mechanism, and the gripping mechanism includes an outer periphery of the pulling target object. A gripping part that presses and grips the part, and a moving mechanism that moves the gripping part.

  According to such a configuration, the moving mechanism moves the gripping portion to the position of the outer peripheral portion of the extraction object. That is, the moving mechanism moves the grip portion to a position where the outer peripheral portion of the object to be pulled can be pressed. As a result, the gripping mechanism can grip each of the extraction objects having different sizes. Then, after the gripping part grips the drawing object, the transmission mechanism transmits the pulling force to the drawing object via the gripping mechanism. Thereby, the extraction object is extracted.

  Further, in the extraction tool according to the present invention, the object to be extracted is a fixed pin inserted through an anchor bolt, and the transmission mechanism is screwed to the screw body coupled to the gripping mechanism. And a support body that supports the gripping mechanism via the screw body and the nut. The support body includes a first locking portion that locks the nut, and a first locking section that is locked at a predetermined position. The predetermined position at which the second locking portion is locked is a position in the middle of the anchor bolt, and the nut is locked to the first locking portion, 2 In a state where the locking portion is locked at the midway position of the anchor bolt, when the gripping mechanism is moved by the movement of the screw body due to the rotation of the nut, the pulling force is fixed through the gripping portion. Configured to support the gripping mechanism to transmit to the pin Good.

  According to such a configuration, the gripping mechanism grips the fixed pin that is the object to be pulled out. And a support body latches a nut in a 1st latching | locking part. Further, the support is locked to the midway part of the anchor bolt by the second locking part. When the nut rotates in a state of being locked to the first locking portion, the screw body screwed into the nut moves relative to the support. As the screw body moves in the direction of pulling out the fixing pin, the first locking portion receives a pressing force from the nut, and the second locking portion receives a pressing force from the middle portion of the anchor bolt. Thereby, the support body can support the screw body and the gripping mechanism so that the movement of the screw body acts as a pulling force of the fixing pin. Accordingly, the pulling force generated in the screw body is transmitted to the fixing pin via the gripping mechanism, and the fixing pin can be pulled out from the anchor bolt.

  In the extraction tool according to the present invention, the object to be extracted is an anchor bolt in a state in which the fixing pin is extracted, and a predetermined position where the second locking portion is locked is a construction of the anchor bolt. In the state where the nut is locked to the first locking portion and the second locking portion is locked at the position of the construction surface of the anchor bolt, the support body is formed by rotation of the nut. When the gripping mechanism is moved by the movement of the screw body, the gripping mechanism may be supported so that the pulling force is transmitted to the anchor bolt via the gripping portion.

  According to such a configuration, the gripping mechanism grips the anchor bolt that is the object to be pulled out. And a support body latches a nut in a 1st latching | locking part. Moreover, a support body is latched by the construction surface of an anchor bolt in the 2nd latching | locking part. When the nut rotates in a state of being locked to the first locking portion, the screw body screwed into the nut moves relative to the support. As the screw body moves in the direction of pulling out the anchor bolt, the first locking portion receives a pressing force from the nut, and the second locking portion receives a pressing force of the same strength from the construction surface of the anchor bolt. . Thereby, the support body can support the screw body and the gripping mechanism so that the movement of the screw body acts as a pulling force of the anchor bolt. Therefore, the pulling force generated in the screw body is transmitted to the anchor bolt via the gripping mechanism, and the anchor bolt can be pulled out from the construction surface of the anchor bolt.

  Further, in the pulling tool according to the present invention, the moving mechanism has a male screw portion provided on the long first member having the grip portion and a female screw portion that can be screwed to the male screw portion. And a cylindrical second member rotatable around a predetermined axis, and the first member is screwed into the female screw portion when the second member rotates around the axis. It may be configured to be movable in a predetermined direction via the male screw part.

  According to such a configuration, the second member formed in a cylindrical shape rotates about its axis, so that the female screw portion also rotates. The female screw portion can move the first member in the longitudinal direction by rotating around the axis while engaging with the male screw provided on the circumferential surface of the first member formed in a long shape. . Accordingly, the first member can be moved in a predetermined direction so that the outer peripheral portion of the object to be pulled is pressed and held, and thus the holding portion can be moved.

  As described above, the pulling tool according to the present invention has an excellent effect of pulling out any of the pulling objects having different sizes.

The front view of the extraction tool which concerns on one Embodiment of this invention is shown. The partial cross section figure of the drawing tool which concerns on the same embodiment is shown. The AA sectional view of the extraction tool concerning Drawing 2 of the embodiment is shown. The other partial sectional view which concerns on the extraction tool of the embodiment is shown.

  Hereinafter, an embodiment of a drawing tool according to the present invention will be described with reference to FIGS.

  In the present embodiment, the object to be pulled out is the anchor bolt 4 or the fixing pin 5 inserted through the anchor bolt 4. Further, the anchor bolt 4 may be provided with a male screw portion 41, and a nut 6 may be screwed into the middle portion of the anchor bolt 4. The fixing pin 5 is formed in a nail shape, and its head is formed with a diameter smaller than the outer diameter of the anchor bolt 4. Further, the head has a diameter larger than that of the shaft portion and is in contact with the end of the anchor bolt 4.

  As shown in FIGS. 1 and 2, the pulling tool 1 includes a gripping mechanism 2 that grips a pulling target and a transmission mechanism 3 that transmits a pulling force to the pulling target via the gripping mechanism 2.

  The gripping mechanism 2 is connected to the transmission mechanism 3 and is provided to grip the object to be pulled out. The gripping mechanism 2 includes a plurality of (three in the illustrated example) first members 22, 22, and 22 that grip the object to be pulled out, a second member 23 that engages with the first member 22, a first member 22, and a first member A holding body 21 that holds the two members 23 and a cover 24 that covers the holding body 21 are provided.

  The first member 22 is slid in contact with the holding body 21, a male screw portion 221 provided on the peripheral surface of one end of the elongated shape, a holding portion 222 that presses and holds the outer peripheral portion of the object to be pulled out. And a sliding portion 223 that moves.

  Each of the first members 22 is held by the holding body 21 such that the longitudinal direction thereof is inclined with respect to the axial direction of the holding body 21. Each of the first members 22 is held by the holding body 21 so as to be movable in the longitudinal direction.

  The position of the male screw portion 221 is regulated by being held by the holding body 21 and engaging with the second member 23. The male screw portions 221 provided on the first member 22 have the same pitch.

  The grip portion 222 is provided at the other end portion of the first member 22 in the longitudinal direction. The gripping part 222 has a flat gripping surface 224 for gripping the outer peripheral part of the object to be pulled out. The holding surface 224 is formed in parallel with the axial direction of the holding body 21. By holding the first member 22 so as to be movable in the longitudinal direction, as shown in FIG. 3, the gripping surfaces 224 provided on each of the first members 22 are also configured to be movable.

  The sliding part 223 is provided on the side opposite to the gripping surface 224 in the gripping part 222. The first member 22 is guided to move in the longitudinal direction by sliding the sliding portion 223 in contact with a part of the holding body 21.

  The 2nd member 23 is comprised cyclically | annularly, and it is comprised so that rotation is possible centering on the axial center. A part of the outer peripheral surface of the second member 23 can be engaged with the cover 24. The second member 23 includes a rotating tooth 231 that can be engaged with a handle (not shown) and a female screw portion 232 that is engaged with the male screw portion 221 of the first member 22.

  A plurality of the rotating teeth 231 are formed along the circumferential direction of the second member 23. The rotating teeth 231 are provided so as to protrude toward the end of the holding body 21 facing the object to be extracted.

  The female screw portion 232 engages with the male screw portions 221, 221, and 221 of the three first members 22, 22, and 22, respectively. By rotating the second member 23 in the forward direction or the reverse direction using a handle (not shown), the female screw portion 232 has the male screw portions 221, 221, 221 of the three first members 22, 22, 22 respectively. Serves as a guide.

  In the present embodiment, the male screw portion 221 of the first member 22 and the female screw portion 232 of the second member 23 constitute a moving mechanism that moves the first member 22 in the longitudinal direction.

  The holding body 21 is for holding the first member 22 and the second member 23. The holding body 21 includes a cylindrical portion 211 having an inner diameter larger than the object to be pulled out, a shaft portion 212 that connects the cylindrical portion 211 and the gripping mechanism 2, and a flange portion 213 that holds the first member 22.

  One end of the cylindrical portion 211 is closed by the shaft portion 212, and the other end is opened with a diameter that allows the drawing object to be inserted. Moreover, the cylinder part 211 has a guide part 211b for guiding the first member 22 in a predetermined direction, and a handle hole 211c for supporting a handle (not shown).

  The guide portion 211 b is provided at a position that contacts the first member 22 on the inner surface of the cylindrical portion 211. The guide part 211b is provided as a surface inclined from the axial direction of the cylindrical part 211. More specifically, the guide portion 211b is a groove having a surface that expands the inner diameter of the cylindrical portion 211 from the opening side end portion of the cylindrical portion 211 toward the closing side end portion. It is provided as a groove parallel to the tilt direction.

  A plurality of handle holes 211 c are provided on the outer peripheral surface of the cylindrical portion 211. The handle holes 211c are provided at predetermined intervals in the circumferential direction of the outer peripheral surface of the cylindrical portion 211.

  One end portion of the shaft portion 212 is coupled to a part of the transmission mechanism 3. The other end of the shaft portion 212 is formed integrally with the cylindrical portion 211. The central axis of the shaft portion 212 coincides with the central axis of the transmission mechanism 3.

  The flange portion 213 is provided at an intermediate position in the axial direction of the shaft portion 212. The flange portion 213 is provided around the shaft portion 212 so as to protrude radially outward from the shaft center of the shaft portion 212. The flange portion 213 has a larger diameter than the outer diameter of the cylindrical portion 221. The flange portion 213 has a through hole 213a through which the first member 22 can be inserted. The holding part 21 has an axial center, and coincides with the axial center of the cylindrical part 221 and also coincides with the axial center of the axial part 212. In addition, the axis of the holding portion 21 matches the axis of the second member 23.

  The through hole 213 a has a center line inclined with respect to the axial direction of the holding body 21. The through hole 213a has a diameter through which the first member 22 can be inserted, and locks one end side of the first member 22, that is, the end portion on the male screw portion 221 side. The through hole 213a holds the first member 22 movably in the tilt direction.

  The cover 24 is formed in a cylindrical shape. The cover 24 is provided to cover a part of the outer peripheral portion of the second member 23 and the shaft portion 212.

  The transmission mechanism 3 includes a screw body 31 connected to the gripping mechanism 2, a nut 32 screwed into the screw body 31, and a support body 33 that supports the gripping mechanism 2 via the screw body 31 and the nut 32. .

  One end of the screw body 31 is connected to the axis 212 of the holding body 21, and the other end is a free end. The screw body 31 has a length sufficient to pull out the object to be pulled out. The screw body 31 includes two screw bodies, one screw body screwed to the nut 32 and the other screw body coupled to the shaft portion 212 of the gripping mechanism 2, coupled by a coupling portion 311 (for example, a nut). And a single screw body 31. The central axis of the screw body 31 coincides with the central axis of the shaft portion 212.

  The nut 32 is a hexagonal nut, and is configured to be able to be engaged with the support body 33 by being screwed into the screw body 31. Further, the nut 32 is locked to the support body 33, thereby preventing the gripping mechanism 2 and the screw body 31 from falling off from the support body 33.

  The support 33 is a long frame, and supports the gripping mechanism 2 in a state of being positioned inside. The support 33 holds the gripping mechanism 2 movably along its longitudinal direction. The support 33 has a first side 33a and a second side 33b provided in the longitudinal direction, and a third side 33c and a fourth side 33d provided in the short side direction. The support 33 includes a first through hole 331 provided in the third side 33c, a second through hole 332 provided in the fourth side 33d, a first locking portion 333 that locks the nut 32, and the nut 6 or And a second locking portion 334 locked to the foundation construction surface 7.

  The first through hole 331 has a diameter smaller than the outer diameter of the nut 32. The first through hole 331 has a diameter sufficiently larger than the diameter of the screw body 31. As a result, the first through hole 331 passes through the screw body 31 so as to be movable in the axial direction, and the edge of the first through hole 331 is engaged with the nut 32 screwed into the screw body 31 on the outer surface side of the support body 33. The parts are in contact with each other. Therefore, the first through hole 331 prevents the other end of the screw body 31 from falling off.

  The 2nd through-hole 332 is provided in the position which agree | coincides in the axial center direction of the 1st through-hole 331, and is provided with the diameter of the grade which can penetrate a drawing | extracting target object. The second through hole 332 has a diameter larger than the outer diameter of the anchor bolt 4. Thereby, the 2nd through-hole 332 can penetrate both the anchor bolt 4 and the fixing pin 5 which are extraction objects.

  The first locking portion 333 is provided at the edge of the first through hole 331. Since the first locking portion 333 has a diameter smaller than the diameter of the nut 332, the nut 32 screwed into the screw body 31 can be locked.

  The second locking portion 334 is provided at the edge of the second through hole 332. For example, since the second locking portion 334 has a diameter smaller than the diameter of the nut 6, the second locking portion 334 can be locked to the nut 6 screwed into the anchor bolt 4.

  The configuration of the extraction tool 1 according to this embodiment is as described above. Next, the operation of the extraction tool 1 according to this embodiment will be described.

  First, as shown in FIG. 2, the extraction tool 1 is used to extract the fixing pin 5 inserted through the anchor bolt 4. The anchor bolt 4 and the fixing pin 5 are inserted through the second through hole 332. And the 2nd through-hole 332 penetrates the anchor bolt 4 and the fixing pin 5 to the position of the nut 6, and the 2nd latching | locking part 334 is latched by the nut 6 located in the middle part of the anchor bolt 4. .

  Then, the fixing pin 5 inserted through the second through hole 332 is inserted into the cylindrical portion 211. The second member 23 has a shaft centered by rotating the handle shaft (not shown) supported by the handle hole 211c so that the handle teeth mesh with the rotating teeth 231 and the rotating force of the handle is transmitted to the rotating teeth 231. Rotate around.

  When the second member 23 rotates, the female screw portion 232 rotates about its axis. The female screw portion 232 is engaged with and engaged with the male screw portions 221, 221, and 221 of the three first members 22, 22, and 22. The rotation of the female screw portion 232 is caused by the rotation of the male screw portions 221, 221, and 221. Tell each one. The male screw portion 221 moves the first member 22 in the longitudinal direction in accordance with the rotation of the female screw portion 232. At this time, each 1st member 22 moves to the inclination direction of the 1st member 22 because the sliding part 223 slides along the guide part 211b. And the holding part 222 of the 1st member 22 presses the outer peripheral part of the head of the fixing pin 5.

  Here, the 1st member 22 is arrange | positioned at equal intervals in the inner peripheral direction of the cylinder part 211 as mentioned above, and each male screw part 221 has the same pitch. Each first member 22 is provided to be inclined with respect to the axial direction of the holding body 21. Thereby, when the female screw portion 232 rotates, the gripping surfaces 224 move so as to change the distance between the gripping surfaces 224 and relatively change their positions. As shown in FIG. 3, the gripping surfaces 224, 224, and 224 move relative to the respective diameters of the anchor bolt 4 and the fixing pin 5 to securely grip the object to be pulled out from three directions. Can do.

  In a state where the three first members 22, 22, 22 press and hold the outer periphery of the head of the fixing pin 5, the nut 32 is rotated in the forward direction using a hexagon wrench (not shown). As a result, the screw body 31 transmits the pulling force to the fixing pin 5 via the gripping mechanism 2. Then, the gripping mechanism 2 can pull out the fixing pin 5 from the anchor bolt 4.

  After the fixing pin 5 is pulled out, the rotating tooth 231 is rotated by a handle (not shown), and the first member 22 moves along the guide portion 211b, thereby moving away from the fixing pin 5. That is, the 1st member 22 can remove the holding | maintenance fixing pin 5 by moving to the direction which spaces apart along the inclination direction.

  Next, as shown in FIG. 4, the anchor bolt 4 is pulled out. First, the nut 6 is removed from the anchor bolt 4. And the 2nd latching | locking part 334 of the 4th edge | side 33d contact | abuts to the construction surface 7 of a foundation. Next, the end portion of the anchor bolt 4 is inserted into the cylindrical portion 211.

  The rotating tooth 231 is rotated by the handle, and the first member 22 moves along the inclination direction, thereby pressing and gripping the outer peripheral portion of the anchor bolt 4. In this state, the nut 32 is rotated in the forward direction using a hexagon wrench or the like (not shown). Therefore, the screw body 31 transmits a pulling force to the anchor bolt 4 via the gripping mechanism 2. As a result, the gripping mechanism 2 can pull out the anchor bolt 4 from the foundation construction surface 7.

  As described above, the pulling tool 1 according to the present embodiment includes the gripping part 222 that the gripping mechanism 2 presses and grips the outer periphery of the object to be pulled out, and the moving mechanism that moves the gripping part 222. Any of the different objects to be drawn can be drawn. More specifically, the male screw part 221 of the first member 22 and the female screw part 232 of the second member 23 function as a moving mechanism, and the sliding part 223 of the first member 22 is slid along the guide part 211b. Therefore, the gripping surface 224 of the gripping portion 222 can be moved in the tilt direction of the first member 22. Therefore, both the anchor bolt 4 and the fixing pin 5 can be pulled out.

  Further, in the pulling tool 1 according to the present embodiment, when the fixing pin 5 inserted through the anchor bolt 4 is pulled out, the first locking portion 333 of the support 33 locks the nut 32 and the second locking The portion 334 is locked at the midway position of the anchor bolt 4, that is, at the position of the nut 6. Since the force from the nut 32 acts on the first locking portion 333 and the force from the nut 6 acts on the second locking portion 334, even if the screw body 31 and the gripping mechanism 2 move, The support 33 does not move. Therefore, the pulling force is transmitted from the transmission mechanism 3 to the fixing pin 5 through the gripping mechanism 2 by the rotation of the nut 32, and the fixing pin 5 can be pulled out from the anchor bolt 4.

  Further, in the pulling tool 1 according to this embodiment, when the anchor bolt 4 in the state where the fixing pin 5 is pulled out is pulled out from the construction surface 7, the first locking portion 333 of the support 33 locks the nut 32. The second locking portion 334 is locked at the position of the construction surface 7 of the anchor bolt 4. Since the force from the nut 32 acts on the first locking portion 333 and the force from the construction surface 7 acts on the second locking portion 334, even if the screw body 31 and the gripping mechanism 2 move. The support 33 does not move. Therefore, the pulling force is transmitted from the transmission mechanism 3 to the anchor bolt 4 through the gripping mechanism 2 by the rotation of the nut 32, and the anchor bolt 4 can be pulled out from the construction surface 7.

  Further, in the pulling tool 1 according to the present embodiment, the moving mechanism is configured by the male screw portion 221 and the female screw portion 232, and the female screw portion 232 is rotated by the second member 23 rotating around its axis. Is done. By rotating the female screw portion 232, the male screw portion 221 that is screwed into the female screw portion 232 is moved, so that the first member 22 is moved. The first member 22 moves in the inclined direction by moving the sliding portion 223 along the guide portion 211b, and moves the gripping surface 224 according to the outer peripheral portion of the object to be pulled out. Therefore, the gripping surface 224 can press and grip the outer peripheral portion of the object to be pulled out, and can grip objects to be pulled out having different diameters.

  It should be noted that the drawing tool according to the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the gist of the present invention. Moreover, it is needless to say that configurations, methods, and the like according to various modifications described below may be arbitrarily selected and employed in the configurations, methods, and the like according to the above-described embodiments.

  For example, in the removal of the fixing pin 5 according to the embodiment described above, the nut 6 is locked to the anchor bolt 4, but the fixing pin 5 is in a state where the nut 6 is removed from the anchor bolt 4. It may be pulled out. In this case, the second through hole 332 passes the anchor bolt 4 to the construction surface 7. And the 2nd latching | locking part 334 of the 4th edge | side 33d is latched by the construction surface 7. FIG. Thereby, the fixing pin 5 can be pulled out similarly to the case where the nut 6 is screwed onto the anchor bolt 4.

  Moreover, in the drawing tool 1 which concerns on the said embodiment, the construction surface 7 may be a concrete surface, slopes, such as a mountain.

  In addition, the gripping mechanism 2 according to the above embodiment has been described with the three first members 22, 22, 22, but the number of the first members 22 included in the gripping mechanism 2 is not limited to three. For example, when the gripping mechanism 2 has one first member 22, the first member 22 may be configured to grip the object to be pulled out with the inner surface of the cylindrical portion 211. In addition, the gripping mechanism 2 has one arc-shaped first member 22, and the first member 22 changes the diameter and presses the outer peripheral portion of the pulling target object to hold the pulling target object. It may be.

  Further, in the first member 22 according to the above-described embodiment, the grip portion 222 may be a claw portion that is inserted between the fixing pin 5 and the anchor bolt 4. Thereby, when the fixing pin 5 is pulled out, the claw portion is caught between the head of the fixing pin 5 and the anchor bolt 4 and is caught on the head. The claw portion transmits the pulling force to the head of the fixing pin 5. Thereby, the fixing pin 5 can be pulled out more reliably. Moreover, since the nail | claw part bites into the external thread part 41 of the anchor bolt 4, the anchor bolt 4 can be hold | gripped more reliably.

  In the first member 22 according to the above embodiment, the gripping force may be increased by knurling the gripping surface 224 or the like. Thereby, when the gripping surface 224 transmits the pulling force to the fixed pin 5, the reliability of gripping the gripping surface 224 to the fixed pin 5 can be improved.

  Moreover, in the support body 33 which concerns on the said embodiment, although demonstrated as a frame body, as long as the 2nd through-hole 332 is a structure which can penetrate the anchor bolt 4, what kind of structure may be sufficient. For example, the fourth side 33d having the second through-hole 332 may be omitted. And the 2nd latching | locking part 334 may be provided in the position of the support body 33 contact | abutted to the construction surface 7, ie, the edge part of the 1st edge | side 33a and the 2nd edge | side 33b, respectively.

  Further, the screw body 31 and the nut 32 according to the above embodiment may be a combination of a rack and a pinion.

  Moreover, although the said embodiment demonstrated the case where the 2nd through-hole 332 had a diameter smaller than the diameter of the nut 6, the 2nd through-hole 332 may be formed larger than the diameter of 6 of a nut. . In order to lock the support 33 at the position of the nut 6, an attachment that can be attached to the second through hole 332 may be used. The attachment has a hole through which the object to be pulled can be inserted and a diameter smaller than that of the nut 6. Accordingly, the attachment may be locked to the nut 6 and function as the second locking portion 334.

  DESCRIPTION OF SYMBOLS 1 ... Extraction tool, 2 ... Holding mechanism, 3 ... Transmission mechanism, 4 ... Anchor bolt, 5 ... Fixing pin, 6 ... Nut, 21 ... Holding body, 22 ... 1st member, 23 ... 2nd member, 24 ... Cover, 31 ... Screw body, 32 ... Nut, 33 ... Support body, 33a ... First side, 33b ... Second side, 33c ... Third side, 33d ... Fourth side, 41 ... Male screw part, 211 ... Tube part, 211b ... guide part, 211c ... handle hole, 212 ... shaft part, 213 ... flange part, 213a ... through hole, 221 ... male screw part, 222 ... gripping part, 223 ... sliding part, 224 ... grip surface, 231 ... rotating tooth 232 ... Female thread part, 311 ... Coupling part, 331 ... 1st through-hole, 332 ... 2nd through-hole, 333 ... 1st locking part, 334 ... 2nd locking part

Claims (4)

In a pulling tool comprising a gripping mechanism for gripping a pulling object and a transmission mechanism for transmitting a pulling force to the pulling object via the gripping mechanism,
The pulling tool, wherein the gripping mechanism includes a gripping portion that presses and grips an outer peripheral portion of the object to be pulled out, and a moving mechanism that moves the gripping portion. The object to be pulled out is a fixing pin inserted through an anchor bolt,
The transmission mechanism includes a screw body coupled to the gripping mechanism, a nut screwed into the screw body, and a support body that supports the gripping mechanism via the screw body and the nut,
The support has a first locking portion for locking the nut, and a second locking portion locked at a predetermined position,
The predetermined position at which the second locking portion is locked is a position in the middle of the anchor bolt. The nut is locked to the first locking portion, and the second locking portion is in the middle of the anchor bolt. When the gripping mechanism is moved by the movement of the screw body due to the rotation of the nut, the support body in the state where it is locked at the position of the section so that the pulling force is transmitted to the fixed pin via the gripping section. The extraction tool of claim 1, wherein the extraction tool is configured to support a mechanism. The pull-out object is an anchor bolt in a state where the fixing pin is pulled out,
The predetermined position where the second locking portion is locked is the position of the anchor bolt construction surface, the nut is locked to the first locking portion, and the second locking portion is anchor bolt construction. In a state where the support is locked at the position of the surface, the support body is configured so that the pulling force is transmitted to the anchor bolt via the grip portion when the gripping mechanism is moved by the movement of the screw body by the rotation of the nut. 3. The extraction tool of claim 2, wherein the extraction tool is configured to support a mechanism. The moving mechanism includes a male screw portion provided on the first elongated member having the grip portion and a female screw portion that can be screwed to the male screw portion, and is rotatable around a predetermined axis. A cylindrical second member,
The first member is configured to be movable in a predetermined direction via a male screw portion that is screwed into the female screw portion when the second member rotates about its axis. Item 4. The extraction tool according to any one of Items 1 to 3.

Images