JP5878195B2 - Nut turning tool and connecting mechanism of nut turning tool - Google Patents

Description

  The present invention provides a nut turning tool suitable for turning a nut and attaching a nut to a screw portion of a bolt or removing a nut attached to a screw portion of a bolt in an indirect hot wire operation, and The present invention relates to a structure of a coupling mechanism capable of changing the posture of the nut turning tool.

  In indirect hot wire work, when a nut mounted on a screw part of a bolt attached to a brace or the like is turned and tightened to the bolt, for example, a ratchet wrench for indirect hot wire as shown in Patent Document 1 is used. It is common. In the ratchet wrench of Patent Document 1, a nut is previously attached to the holding hole of the socket, and the nut attached to the screw portion of the bolt is rotated by rotating the ratchet wrench around the center of the holding hole. .

  Moreover, the nut attached to the screw portion of the bolt is rotated by holding the nut with two holding portions of the insulating Yatco as shown in Patent Document 1 and rotating the nut in a predetermined direction.

JP 2012-878839 A

  However, when the nut is mounted in the socket holding hole of the ratchet wrench in advance, the ratchet wrench is brought close to the bolt while the nut is held in the socket, and the nut is externally mounted on the screw portion of the bolt. A series of operations of rotating the ratchet wrench is required.

  For this reason, there is a possibility that the nut may fall out of the socket. Therefore, normally, with the holding hole of the socket facing upward from the horizontal direction, the ratchet wrench is brought close to the bolt, and the nut is attached to the screw portion of the bolt. Workers also need a high degree of caution when installing them.

  In this respect, Patent Document 1 attempts to improve the nut in order to prevent the nut from falling off the socket. However, the nut of Patent Document 1 includes a nut body, a linear body that is separably fastened to the outer periphery of the nut body, and wound around the nut body, and the nut body from above the linear body. It is composed of a tape that is wound around the outer circumference of the nut and is more complicated than a conventional nut having a simple annular structure, and is composed of a plurality of parts.

  In addition, when the nut is gripped by the gripping part of the insulating Yatco and the nut is attached to the threaded part of the bolt, the nut is gripped by the external dimension along the radial direction of the through hole of the nut or the dimension along the axial direction. The places where you can do are limited.

  For this reason, in a state where the nut is gripped by the gripping portion of the insulating jacket, the nut thread groove is aligned with the thread of the threaded portion of the bolt, and when performing a series of operations for rotating the nut, the work space is narrow and There is a problem that the worker needs to operate with an insulated Yachko in an unreasonable posture, and the work efficiency is lowered.

  Therefore, the present invention has a simple structure, even if the nut is moved in a state in which the nut is previously stored in the nut housing member, the screwing of the screw portion of the nut and the bolt, and the operation of rotating the nut, It is an object of the present invention to provide a nut turning tool and a connecting mechanism for the nut turning tool capable of preventing the nut from falling off.

  A nut turning tool according to the present invention includes a case having a first space therein and at least one opening, a nut housing member rotatably accommodated in the first space of the case, and the nut housing A rotation transmitting portion for rotating the member; and an attaching means disposed outside the case. The nut housing member has a second space inside and at least the same side as the opening of the first space. An opening is provided in the cylindrical body, the nut can be accommodated in the second space from the opening of the cylindrical body, and a holding mechanism for holding the nut in the second space is provided. (Claim 1).

  Accordingly, the nut is held by the holding mechanism by inserting the nut into the opening of the nut housing member from the opening of the case of the nut turning tool. For this reason, in attaching the tip tool attached to the insulating operating rod directly or indirectly to the attaching means and bringing the nut turning tool close to the bolt, the nut housing member and the case are inclined so that the opening faces upward. There is no need to place it close to the nut.

  Further, in the nut turning tool according to the present invention, the holding mechanism sandwiches the nut between a contact portion for contacting the nut and an elastic portion that biases the contact portion toward the nut. (Claim 2). The contact portion is, for example, a plate-like member, and the elastic portion is, for example, a coil spring.

  As a result, the nut can be clamped from both sides by the abutting portion urged by the elastic portion, so that the nut can be reliably held in the nut housing member.

  Furthermore, in the nut turning tool according to the present invention, the rotation transmitting portion has a mounting hole in which a projecting portion for rotating the tightening tool is mounted opened on a side opposite to the openings of the first and second spaces. (Claim 3). The tightening tool is for indirect hot-line work, for example, a tip tool such as an indirect ratchet attached to the tip of the common operation rod.

  As a result, after the nut is mounted on the front side of the threaded portion of the bolt while the nut is held by the nut receiving member, the protruding portion of the tightening tool is mounted in the mounting hole of the rotation transmitting portion and the protruding portion is rotated. By doing so, the rotation of the rotation transmitting portion is transmitted to the nut housing member, and the nut housing member also rotates, so that it can be advanced to the base side of the screw portion of the bolt while rotating the nut and tightened to the object. .

  The connecting mechanism of the nut turning tool according to the present invention uses the tool side structure as a mounting means of the nut turning tool according to claim 1 and is attached to the tip of the insulating operation rod. The tip tool provided with the base side constellation structure part is connected via a posture changing member, and the posture change member is connected to the tool side constellation structure part. And a second face structure part connectable with the base side structure of the base side, the surface of the first face structure part facing the tool side structure of the first position and the first It is characterized in that it is directed in a direction different from the face of the second Kikuza structure part facing the base side Kikuza structure part (Claim 4). For example, the surface facing the tool-side Kikuza structure portion of the first Kikuza structure portion and the surface facing the base-side Kikuza structure portion of the second Kikuza structure Kikuza structure portion are the circumferences of the insulating operation rod. For example, it is oriented in a direction shifted by 90 degrees along the direction.

  As a result, the second Kikuza structure part of the posture-changing member is rotated with respect to the base side Kikuza structure part of the tip tool so as to have an arbitrary inclination about the center of the surface of the base side Kikuza structure part. By connecting them, the orientation changing member can be changed in the left-right direction or the front-rear direction with respect to the tip tool. Then, with respect to the first driver seat structure portion of the nut turning tool with respect to the first driver seat structure portion of the posture changing member, the center of the surface of the first driver seat structure portion is set to have an arbitrary inclination. By rotating and connecting to each other, the direction of the posture changing member can be changed to the front-rear direction or the left-right direction. Therefore, it is possible to change the opening direction of the nut housing member of the nut turning tool into various directions by combining the connection states of the two.

  As described above, according to the nut turning tool of the present invention, the nut is held by the holding mechanism by inserting the nut into the opening of the nut housing member from the opening of the case. For this reason, in the operation of attaching the tip tool mounted on the insulating operation rod directly or indirectly to the attachment means and bringing the nut turning tool close to the bolt, the nut receiving member and the case are inclined so that the opening faces upward. Therefore, it is not necessary to place the nut close to the nut, so that it is possible to improve the efficiency and speed of the work of attaching the nut to the screw portion of the bolt.

  In particular, according to the nut turning tool according to the second aspect, the nut can be held by the abutting portion urged by the elastic portion, so that the nut can be securely held in the nut housing member. Therefore, even if the opening of the nut housing member is directed downward, it is possible to prevent the nut from dropping from the nut housing member of the nut turning tool. Therefore, it is possible to further increase the efficiency and speed of the work of attaching the nut to the screw portion of the bolt.

  In particular, according to the nut turning tool according to claim 3, after the nut is mounted on the front side of the screw portion of the bolt in a state where the nut is held by the nut receiving member, the tightening tool is inserted into the mounting hole of the rotation transmitting portion. Since the rotation of the rotation transmitting portion is transmitted to the nut housing member and the nut housing member also rotates by rotating the projecting portion and rotating the projecting portion, it is advanced to the base side of the screw portion of the bolt while rotating the nut. be able to. Therefore, it is possible to easily perform the tightening operation with the nut.

  According to the connecting mechanism of the nut turning tool according to the present invention, the center of the surface of the base-side constellation structure portion is the second constellation structure portion of the posture changing member with respect to the base-side constellation structure portion of the tip tool. By rotating and connecting them to have an arbitrary inclination with the rotation center as the rotation center, it is possible to change the orientation of the posture variation member to the left or right direction or the front-rear direction with respect to the tip tool. The tool-side Kikuza structure part of the nut turning tool is rotated and connected to the first Kikuza structure part of the member so as to have an arbitrary inclination around the center of the surface of the first Kikuza structure part. Thus, the orientation of the posture changing member can be changed to the front-rear direction or the left-right direction. Therefore, it is possible to change the opening direction of the nut housing member of the nut turning tool in various directions by appropriately combining the connection state of the first and second structure parts. is there.

FIG. 1 is an explanatory view showing a nut turning tool according to the present invention, FIG. 1 (a) is a front view of the nut turning tool, FIG. 1 (b) is a side view of the nut turning tool, and FIG. c) is a rear view of the nut turning tool. FIG. 2 is a cross-sectional view showing the nut turning tool, FIG. 2 (a) is a cross-sectional view of the nut turning tool not holding the nut, and FIG. 2 (b) is a drawing of the nut turning tool. It is sectional drawing of the state which hold | maintained. 3A and 3B are explanatory views showing the posture changing member according to the present invention. FIG. 3A is a side view of the posture changing member, and FIG. 3B is a front view of the side view of the posture changing member. FIG. FIG. 4 is an explanatory diagram illustrating an example of a usage state of the nut turning tool and the posture changing member.

  Hereinafter, a nut turning tool according to the present invention and a connecting mechanism between the nut turning tool and a tip tool attached to an insulating operation rod will be described with reference to the drawings.

  As shown in FIG. 1 and FIG. 2, the nut turning tool 1 includes a case 2, a nut housing member 3, a rotation transmission portion 4, and a tool-side constellation structure portion 5 as attachment means. .

  The case 2 has a cylindrical space 21 inside, and the space 21 has an inner diameter that is slightly larger than the outer diameter of the nut housing member 3 described below, and both sides of the space 21 in the axial direction. Openings 21a and 21b are formed in the upper part.

  The opening 21a has a circular shape, and ribs 22 are erected in an annular shape from the periphery to the center of the circle. Accordingly, the inner diameter dimension of the opening 21 a is smaller than the outer diameter dimension of the nut housing member 3, while being larger than the outer diameter dimension of the nut 300. The opening 21b has an inner diameter that is larger than the outer diameter of at least a portion of the rotation transmitting portion 4 on the nut housing member 3 side described below.

  The nut housing member 3 is a cylindrical tubular body having a space 31 therein and openings 31a and 31b formed on both sides. The space 21 of the case 2 can be rotated around the center of the circular circle of the cylinder. Is housed in. That is, the opening 31 a of the nut housing member 3 faces the same side as the opening 21 a of the case 2 when the case 2 is housed in the space 21, and the opening 31 b of the nut housing member 3 is when the housing 2 is housed in the space 21 of the case 2. The case 2 faces the same side as the opening 21b. And even if the nut housing member 3 is inclined so that the opening 21a side of the case 2 is downward, the nut housing member 3 has the ribs 22 erected on the periphery of the opening 21a, so that it does not come out of the space 21 to the outside. ing.

  Further, the space 31 of the nut housing member 3 is a circular hole having an inner diameter larger than the outer diameter of the nut 300 described below at a portion on the opening 31a side. And the inner peripheral surface of the site | part by the side of the opening 31a of the space 31 is what extended in series without the level | step difference with the inner peripheral surface of the opening 21a of the case 2. FIG. Thereby, the nut 300 can be smoothly accommodated in the space 31 from the opening 21 a of the case 2 through the opening 31 a of the nut housing member 3.

  The section of the space 31 on the opening 31b side has a cross-sectional shape. It has an inner shape (hexagonal shape) corresponding to the shape of the rotation transmitting portion 4 described below (in this embodiment, a hexagonal column shape), and has an inner shape dimension slightly larger than the outer dimension of the rotation transmitting portion 4. . Thereby, the rotation transmission part 4 inserted into the space 21 from the opening 21 b of the case 2 is press-fitted into the space 31 from the opening 31 b of the nut housing member 3 and is integrated without rotating with respect to the nut housing member 3. can do.

  Further, in this embodiment, as shown in FIG. 2, bearings (bearings) 32 and 32 are arranged at portions facing the nut housing member 3 in the space 21 of the case 2 so that the nut housing member 3 can be smoothly moved. It can be rotated.

  A holding mechanism 33 for holding the nut 300 is provided on the opening 31 a side in the space 31 of the nut housing member 3.

  In this embodiment, the holding mechanism 33 has two substantially flat plate-like contact portions 33a having contact surfaces that contact the outer peripheral surface of the nut 300, and presses the contact portions 33a toward the nut 300 side. It consists of two pressing parts 33b. The one contact portion 33a and the other contact portion 33a are opposed to each other, and the interval between the one contact portion 33a and the other contact portion 33a is normally shown in FIG. As shown, the outer diameter of the nut 300 is smaller. In this embodiment, the pressing portions 33b are coil springs, and are arranged in a balanced manner at equal intervals so that the contact portions 33a can be uniformly biased toward the nut 300 side.

  2B, when the nut 300 is interposed between the contact portion 33a and the contact portion 33a, the nut 300 is sandwiched between the contact portions 33a and 33a. It will be held.

  In this embodiment, the rotation transmission unit 4 is a hexagonal columnar body, and the rotation of the rotation transmission unit 4 is transmitted to the nut housing member 3 by inserting the nut housing member 3 into the space 31 from the opening 31b. It is possible. A hole 4a is formed at the end of the rotation transmitting portion 4 opposite to the insertion side of the nut housing member 3, and a tip tool having a tightening function such as an indirect ratchet described below is formed in the hole 4a. The protrusion part 61a which protrudes from the main body 61 of 6 and transmits rotation is inserted.

  In this embodiment, the tool-side seat structure 5 has a circular contact surface 51, a screw hole (not shown) formed at the center of the contact surface 51, and screwed into the screw hole. The screw member 52 includes a butterfly-shaped nut 53 having an inner hole threaded therein, and a plurality of strip-shaped protrusions 54 formed on the contact surface 51. The nut 53 is externally mounted on the screw member 52, and can be advanced and retracted along the axial direction of the screw member 52 by rotating the nut 53. The protrusions 54 are disposed so as to extend radially from the periphery of the contact surface 51 toward the screw holes. Although not shown, the screw member 52 may be formed integrally with the contact surface 51.

  Then, the tool-side constellation structure part 5 is connected to the base-side constellation structure part 111 of the proviso-type connector 110, which is a kind of tip tool attached to the head of the common operation rod 100, via the posture variation member 7. It is designed to be connected.

  The Kikuza connector 110 and its base-side Kikuza structure 111 are well-known structures. However, similar to the tool-side Kikuza structure 5, the circular abutment surface and the contact surface A screw hole formed in the center, a screw member screwed into the screw hole, a butterfly-shaped nut in which the inner hole is screwed, and a plurality of strip-shaped protrusions formed on the contact surface It is configured.

  As shown in FIG. 3, the posture variation member 7 includes a first constellation structure part 71 and a second constellation structure part 72. The first Kikuza structure part 71 and the second Kikuza structure part 72 are configured so that when the posture changing member 7 is attached to the Kikuza connector 110 attached to the tip of the common operation rod 100, the common operation is performed. The rods 100 are connected so as to be aligned along the axial direction of the rod 100.

  Among these, the first Kikuza structure part 71 includes a substantially circular contact surface 711, a slit 712 extending from the periphery toward the center of the contact surface 711, and a plurality of strips formed on the contact surface 711. And a protruding portion 713 having a shape. The width of the slit 712 in the short direction is slightly larger than the diameter dimension of the screw member 52 of the tool-side star structure 5. The protrusions 713 are arranged so as to extend radially from the periphery of the contact surface 711 toward the screw holes, and the distance between the adjacent protrusions 713 and 713 is short of the protrusions 54. It is slightly larger than the width in the hand direction, and can engage with the protrusion 54.

  In addition, the second seat structure 72 has a substantially circular contact surface 721, a slit 722 extending from the periphery toward the center of the contact surface 721, and a plurality of strips formed on the contact surface 721. Projecting portion 723. The width of the slit 722 in the short direction is slightly larger than the diameter dimension of the screw member of the base-side constellation structure 111. The protrusions 723 are arranged so as to extend radially from the periphery of the abutting surface 721 toward the screw holes, and the interval between the adjacent protrusions 723 and 723 is determined based on the base side structure. The width of the protruding portion of the portion 111 is slightly larger than the width in the short direction, and can be engaged with the protruding portion.

  Instead of the slit 712 of the first Kikuza structure part 71 and the slit 722 of the second Kikuza structure part 72, a through hole slightly larger than the diameter of the screw member may be used.

  Then, the contact surface 711 of the first constellation structure 71 and the contact surface 721 of the second constellation structure 72 are shared as shown in FIGS. 3 (a) and 3 (b). The direction is shifted by 90 degrees along the circumferential direction of the operation rod 100.

  However, the second Kikuza structure portion 72 of the posture changing member 7 can be inclined with respect to the base-side Kikuza structure portion 111 of the Kikuza connector 110, with the screw member of the base-side Kikuza structure portion 111 as the center of rotation. Rotating and connecting so that the tool-side structure 5 of the nut turning tool 1 can be arbitrarily set with the screw member 52 as the center of rotation with respect to the first structure 71 of the posture variation member 7. It is possible to freely change the direction of the opening 31a of the nut housing member 3 of the nut turning tool 1 by rotating and connecting them so as to be inclined.

  The process of tightening the nut 300 using the nut turning tool 1 having the above-described configuration will be described with reference to FIGS.

  First, the nut 300 is housed in the space 31 of the nut housing member 3 from the opening 31 a of the nut housing member 3. As a result, the nut 300 is held between the contact portions 33a and 33a using the spring force (pressing force) of the pressing portion 33b, so that the nut 300 is held in the space 31 of the nut housing member 3. Is done. Before and after this work, the nut turning tool 1 is attached to the star connector 110 attached to the common operation rod 100 via the posture changing member 7. At the time of this mounting operation, the mounting position of the second Kikuza structure part 72 of the posture changing member 7 to the base side Kikuza structure part 111 of the Kikuza connector 110 and the first Kikuza of the posture changing member 7. Adjustments are also made so that the operator can easily work on the attachment position of the tool-side chin-seat structure part 5 of the nut turning tool 1 to the structure part 71.

  Next, holding the handle portion on the proximal end side of the common operation rod 100, the nut turning tool 1 is brought closer to the bolt 400, and the nut 400 is mounted on the bolt 400.

  Further, the protruding portion 61a of the tip tool 6 (attached to the common operation rod 100) is inserted into the hole 4a of the rotation transmission portion 4 of the nut turning tool 1, and the common operation rod 100 is rotated in a required direction. As a result, the nut housing member 3 rotates together with the rotation transmission unit 4 while holding the nut 300, so that the nut 300 can move forward to the base side of the bolt 400 and tighten the object.

  The process of removing the nut 300 from the bolt 400 using the nut turning tool 1 having the above-described configuration will be described with reference to FIGS. 4 and 2.

  First, the nut turning tool 1 is attached to the Kikuza connector 110 mounted on the common operation rod 100 via the posture changing member 7. At the time of this mounting operation, the mounting position of the second Kikuza structure part 72 of the posture changing member 7 to the base side Kikuza structure part 111 of the Kikuza connector 110 and the first Kikuza of the posture changing member 7. Adjustments are also made so that the operator can easily work on the attachment position of the tool-side chin-seat structure part 5 of the nut turning tool 1 to the structure part 71.

  Next, the nut housing member 3 is sheathed from the opening 31 a with respect to the nut 300 sheathed on the bolt 400, and the nut 300 is housed in the space 31 of the nut housing member 3 while being sheathed on the bolt 400. At this time, the nut 300 is held in the space 31 of the nut housing member 3 because the nut 300 is sandwiched between the contact portions 33a and 33a using the spring force (pressing force) of the pressing portion 33b. It will be in the state.

  Further, with the protruding portion 61a of the tip tool 6 (attached to the common operation rod 100) inserted in the hole 4a of the rotation transmitting portion 4, the common operation rod 100 is rotated in a required direction. Thereby, since the nut accommodating member 3 rotates together with the rotation transmission unit 4 while holding the nut 300, the nut 300 can move backward to the tip side of the bolt 400 to loosen the tightening to the object.

  Even if the nut 300 is detached from the bolt 400, the nut 300 remains held by the holding mechanism 33 of the nut housing member 3, so that the nut 300 does not fall off. For this reason, the nut 300 detached from the bolt 400 can be easily recovered.

1 Nut turning tool 2 Case 21 Space (first space)
21a opening 21b opening 3 nut accommodating member 31 space (second space)
31a opening 31b opening 33 holding mechanism 33a contact part 33b pressing part 4 rotation transmitting part 4a hole part 5 tool side seat structure part 6 tip tool 7 posture changing member 71 first star seat structure part 711 contact surface 72 second 2 Constellation structure part 100 Common operating rod 110 Constellation connector 111 Base side constellation structure part 721 Contact surface 300 Nut 400 Bolt

Claims (4)

A case having a first space therein and at least one opening, a nut housing member rotatably accommodated in the first space of the case, a rotation transmitting portion for rotating the nut housing member, Mounting means arranged outside the case,
The nut housing member is a cylindrical body having a second space therein and at least the same side as the opening of the first space is opened, and the nut is inserted into the second space from the opening of the cylindrical body. A nut turning tool characterized in that it can be housed and a holding mechanism for holding the nut in the second space is provided.   The holding mechanism holds the nut by sandwiching the nut between a contact portion for contacting the nut and an elastic portion that biases the contact portion toward the nut. The nut turning tool as described.   The rotation transmitting portion is characterized in that a mounting hole in which a projecting portion for rotating a tightening tool is mounted is formed so as to open on the opposite side to the opening of the first and second spaces. The nut turning tool according to claim 1 or 2. The tool side star seat structure part is used as the means for attaching the nut turning tool according to claim 1, and the tip tool provided with the base side star seat structure part attached to the tip of the insulating operation rod is: It is connected via a posture variation member,
The posture changing member has a first Kikuza structure part connectable with the tool side Kikuza structure part, and a second Kikuza structure part connectable with the base side Kikuza structure part,
The surface of the first Kikuza structure part facing the tool side Kikuza structure part and the surface of the second Kikuza structure part facing the base side Kikuza structure part are oriented in different directions. Nut turning tool connection mechanism characterized by

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