JP5415877B2 - Electric nut driver - Google Patents

Description

  The present invention relates to an electric nut turning tool for screwing a nut to a long bolt such as a suspension bolt and moving the nut to a predetermined position of the long bolt.

  Conventionally, when an electric cable or a communication cable is wired in a building or the like, a cable rack for placing and supporting a plurality of electric cables or communication cables is often installed. In a particularly large building, as shown in FIG. 10, the cable racks 50 are provided in multiple stages. In this cable rack 50, horizontal members 52 made of angle members are fixed horizontally to two suspension bolts 51 suspended from a ceiling, and a ladder 53 is placed on these horizontal members. At regular intervals in the direction, the cable is placed on a ladder 53 fixed in this manner, and placed on a cross member 52 that is similarly fixed horizontally to the suspension bolt 51.

  And in order to fix the said cross member 52 to each suspension bolt 51, the nut is screwed and fastened and fixed to the top and bottom of the cross member 52 passed through each suspension bolt 51. Therefore, as shown in FIG. 11, it is necessary to screw a large number of nuts 54 to each suspension bolt 51 and move the nuts 54 to a predetermined position. Conventionally, an operator manually moves the nut 54 above the suspension bolt 51 from below the suspension bolt 51 by the number of cable racks 50 of a desired number.

  This is a time-consuming work. For example, even when a five-stage cable rack 50 as shown in FIG. 10 is installed, 5 pieces (per hanging bolt) × 2 pieces (hanging bolt) × 5 sets = 50 Since it is necessary to attach a single nut, it takes time. Therefore, the tip of a tool such as a screwdriver is fixed to the electric drill, the electric drill is rotated, the gripping part of the tool is rotated, the rotating gripping part is applied to the nut, the nut is rotated, and the suspension bolt We are also trying to raise and lower the nut along

  Although this method is simple, the tip of the driver does not necessarily fit the chuck of the power tool from the beginning, and the driver may come off and blow off during use, and the operator may be injured. Since rotation is transmitted against the outer periphery of the nut, the accuracy of rotation transmission is poor and the efficiency is low.

  Therefore, in order to move the nut up and down along the long bolt, a tool that is connected to an electric tool and rotates the nut with the rotational force of the electric tool has been developed. Patent Document 1 forms a cylindrical body into which all screw bolts are inserted, and a connecting body connected to a rotating portion of a rotary electric motor such as an electric drill or a charging driver is provided at one end of the cylindrical body. The nut turning tool is provided with a socket in which a nut to be screwed onto all screw bolts is provided at the other end.

  Patent Document 2 includes a driving pulley that is detachably fixed to the tip of an electric rotary tool between a pair of upper and lower fixed substrates, and a socket that is fitted and locked around a nut screwed to a suspension bolt. An electric endless belt that interlocks the pulley with the socket and the pulley with the socket by the rotational force of the driving pulley, and rotates the nut fitted and locked to the pulley with the socket by the rotating operation of the electric rotary tool fixed to the driving pulley. This is an electric nut turning tool in which a locking tool is provided on a fixed substrate for locking to the upper surface of a nut fitted in a pulley with a socket.

  Patent Document 3 is a torque wrench for manually tightening a screw body by rotating the head engaged with the screw body and rotating the head engaged with the screw body in a radial manner. The handlebar is equipped with an electric motor for fast turning of the screw body, the motor is separated from the torque wrench body, and the rotation of the motor is transmitted to the head via the flexible shaft. The motor and its battery are a torque wrench provided with a waist belt.

No. 7-42610 Japanese Patent No. 2961417 JP 2005-14193 A

  Since the thing of the said patent document 1 inserts all the long volt | bolts in own cylinder, inserts a nut in the socket of the upper end, and rotates the said nut, a cylinder will become long. . Therefore, it is difficult for workers to handle. Moreover, it is necessary to insert a pin for regulating the insertion length of the long bolt from the side surface of the cylindrical body in accordance with the length of the long bolt, which takes time. In addition, the power tool used for this tool must be operated directly under the long bolt, and there are significant work restrictions.

  Moreover, although the thing of the said patent document 2 is provided with the latching tool which latches the upper surface of the nut fitted and latched to the pulley with a socket of a tool, the bottom of a nut is not latched, The said tool Pressing the nut upwards than the nut moves may cause the tool to come out of the nut. In particular, this tool fixes the electric rotary tool to the driving pulley from below, so that the worker must support the electric rotary tool from under the tool, and may push the electric rotary tool upward from below. In that case, the tool has a drawback that it is easily detached from the nut. Also in this case, since the electric rotary tool is operated from under the tool, there is a drawback that it is difficult to operate.

  Moreover, although the thing of the said patent document 3 is a torque wrench, the screw body rapid rotation mechanism is provided, and it has the structure which transmits rotation of a dedicated motor to the socket engaged with a screw body with a flexible shaft. The details are not described, and the configuration of how the rotation of the motor is transmitted to the socket is unknown. Moreover, there is no description how the head engaged with the screw body is engaged with the nut, and it is unclear. Therefore, an operator must have the torque wrench in a state where the screw body is locked to the socket, and the socket may be detached from the screw body while the screw body is being rotated. Therefore, skill is required for operation.

  The present invention considers such a conventional technique, and when the tool is locked to a nut screwed to a long bolt, it is difficult to come off, and the operator can operate while holding the electric rotary tool sideways. The object is to provide an easy-to-use electric nut turning tool.

  The invention of claim 1 comprises an electric rotary tool, a flexible shaft that transmits the rotation of the electric rotary tool to the tool, and a tool main body that locks a nut that is screwed to a long bolt. Holes are provided on the upper and lower surfaces of the casing so as to face each other, and a tubular body having a through hole centered on each of the holes on the upper and lower surfaces of the casing is rotatably supported in the casing. The upper end of the casing protrudes upward from the hole on the upper surface of the casing, the through hole has an inner diameter through which the long bolt can be inserted, and a nut receiver in which a nut is fitted and locked by providing a step at the upper end opening. A seat is drilled, a first bevel gear is provided along the outer periphery of the tube body, a second bevel gear meshing with the first bevel gear is rotatably provided in the casing, and the second bevel gear is provided. Drill the horizontal shaft of the gear into the side wall of the casing. A nut inserted into the nut receiving seat at the periphery of the opening of the nut receiving seat on the upper surface of the tubular body, allowing one end of the flexible shaft to be freely connected to the tip of the horizontal shaft. One end of the locking plate covering the outer edge of the upper surface of the motor was an electric nut turning tool in which one end of the locking plate was supported so as to be horizontally rotatable and fixed.

  In the invention of claim 2, one end of the connecting shaft is connected to the tip of the horizontal shaft by a universal joint capable of transmitting rotation at any angle, and one end of the flexible shaft can be freely connected to the other end of the connecting shaft. The electric nut driver according to claim 1 is used.

  According to a third aspect of the present invention, there is provided an attachment that can be fitted to the nut receiving seat, and an upper and lower surface having an inner peripheral diameter substantially the same as the outer shape of the nut to be fitted and locked at the center of the attachment. The electric nut driver according to claim 1 or 2, wherein a through hole is provided.

  Further, the invention of claim 4 is directed to an electric rotary tool, a flexible shaft for transmitting the rotation of the electric rotary tool to the tool main body, and two tool main bodies for locking the nuts screwed to two parallel long bolts. And a differential gear device for transmitting the rotation of the flexible shaft to the two tool bodies. Each tool body is provided with holes on the upper and lower surfaces of the box-shaped casing so as to face each other. A tubular body having a through hole whose center is aligned with each hole on the lower surface is rotatably supported in the casing, and an upper end of the tubular body projects upward from a hole on the upper surface of the casing. Has an inner diameter through which the long bolt can be inserted, a stepped portion is provided in the upper end opening, a nut receiving seat into which the nut is fitted and locked is drilled, and the first bevel gear is arranged on the outer periphery of the tube body. Along In the casing, a second bevel gear that meshes with the first bevel gear is rotatably provided, and a horizontal shaft of the second bevel gear is rotatably passed through a hole formed in a side wall of the casing, so that the horizontal One end of a flexible plate that can freely connect one end of the flexible shaft to the tip of the shaft, and covers the outer edge of the nut inserted into the nut receiving seat at the periphery of the opening of the nut receiving seat on the upper surface of the tubular body The nut is screwed onto the long bolt in the nut receiving seat of each tool body, and the upper surface of each nut is covered with each locking tool. The left and right shafts of the differential gear device are connected to the horizontal shaft of each tool body, one end of the flexible shaft is connected to the central shaft of the differential gear device, and the flexible shaft is connected. The other end of the Disability shaft and freely connected to the electric rotary tool, and the electric nut driver tool.

  According to the invention of claim 1, when a nut screwed into a long bolt is fitted into the nut receiving seat of the tool body and the locking plate is put on the nut, the nut is locked from the top, bottom, left and right. The tool body moves up and down along the long bolt only by the rotation of the nut, and there is no possibility that the tool body is detached from the nut by the extra force of the operator. The worker may move the electric rotary tool or the flexible shaft according to the movement of the tool body. Further, the worker only needs to hold the electric rotary tool and the flexible shaft from the side of the tool body, and the worker can perform these operations without taking an unreasonable posture, and can work safely, quickly and efficiently.

  According to the invention of claim 2, since the flexible shaft is connected through the universal joint of the tool body, the operator can operate the electric rotary tool from various angles such as from the lower side of the tool body and from the upper side. Therefore, it is easy to work in high places and narrow places.

  According to the invention of claim 3, even if the size of the nut receiving seat of the tool body does not match the size of the nut to be moved along the long bolt, one or more attachments are attached in advance. If prepared, the nut can be fitted into the nut receiving seat through the attachment, and the nut can be moved along the long bolt. Therefore, the versatility of one tool of this invention spreads.

  According to the invention of claim 4, when two long bolts are arranged in parallel like a cable rack, and the nut is moved to the same position of each long bolt, the tool of the present invention is used. If used, the two nuts can be easily moved to a desired position at the same time. Therefore, less labor is required for the worker, and the work can be performed efficiently and quickly.

  The present invention includes an electric rotary tool, a flexible shaft that transmits the rotation of the electric rotary tool to the tool main body, and a tool main body that locks a nut that is screwed to a long bolt. The tool main body is a box-shaped casing. Holes are provided on the upper and lower surfaces so as to face each other, and a tubular body having a through hole centered on each of the holes on the upper and lower surfaces of the casing is rotatably supported in the casing, and the upper end of the tubular body is provided. Protrudes upward from the hole on the upper surface, the through hole has an inner diameter through which the long bolt can be inserted, and a nut receiving seat in which a nut is fitted and locked at the upper end opening is provided. A first bevel gear is provided along the outer periphery of the tubular body, a second bevel gear meshing with the first bevel gear is rotatably provided in the casing, and a horizontal shaft of the second bevel gear is disposed in the casing. Rotate through the hole in the side wall One end of the flexible shaft can be freely connected to the tip of the horizontal shaft, and the peripheral edge of the opening of the nut receiving seat on the upper surface of the tubular body is covered with the outer edge of the upper surface of the nut inserted into the nut receiving seat. One end of the stop plate is an electric nut turning tool that is pivotally supported in a horizontally rotatable manner.

  As a result, when a nut screwed into a nut receiving seat of the tool body is fitted and the upper surface of the nut is pressed by the locking plate, the nut is locked vertically and horizontally, and the nut is locked during the work. Therefore, the work can be facilitated.

  Embodiment 1 of the present invention will be described below with reference to the drawings. 1 is a longitudinal sectional view of a tool main body of the present invention, FIG. 2 is a perspective view of the tool main body of the present invention, FIG. 3 is a perspective view showing a use state of the present invention, and FIG. FIG.

  This tool includes an electric rotary tool A, a flexible shaft B that transmits the rotation of the electric rotary tool A, and a tool body C that engages and rotates a nut screwed to a long bolt. The electric rotary tool A is a commercially available electric drill, and the flexible shaft B is a commercially available one composed of a flexible shaft and a flexible sheath tube covering the outer periphery of the shaft.

The tool body C is composed of a substantially box-shaped casing 1, and holes 2 a and 2 b are formed on the upper and lower surfaces of the casing 1 so as to face each other. Among these, the hole 2a on the upper surface has a larger diameter than the hole 2b. In addition, a tubular body 3 is vertically provided in the casing 1 via a bearing 4. The upper end of the tube body 3 projects upward from the hole 2a. Further, the through hole 3a penetrating the upper and lower end surfaces of the tube body 3 has an inner diameter through which a long bolt D described later can be inserted.

  In addition, a nut receiving seat 5 having a hexagonal cross section, which has an inner periphery of the through hole 3a, is provided in the upper end opening of the through hole 3a of the tubular body 3 with a stepped portion. Further, a first bevel gear 6 is provided on the outer periphery of the tubular body 3, and the first bevel gear 6 is provided at one end in the casing 1 of the horizontal shaft 7 that is pivotally supported by the side wall of the casing 1. The second bevel gear 8 is meshed.

  The other end of the horizontal shaft 7 is connected to a connection shaft 11 via a universal joint 10 in a case 9 provided adjacent to the side wall of the casing 1, and the connection shaft 11 is connected to the horizontal shaft 7. The rotation is transmitted even when it is inclined. Further, one end of a substantially C-shaped locking plate 12 is pivotally supported by a shaft 13 on the upper end surface of the tubular body 3 so as to be horizontally rotatable, and covers the inner peripheral edge of the upper surface of the nut receiving seat 5. In this state, the locking plate 12 can be fixed.

  In order to use this tool, a nut E is screwed onto the long bolt D from the lower end of the bolt, and the nut E is fitted into the nut receiving seat 5 of the tool body C. At that time, the locking plate 12 is opened, the opening of the nut receiving seat 5 is opened, the long bolt D is inserted into the through hole 3a, and the nut E is fitted into the nut receiving seat 5. Thereafter, the locking plate 12 is closed, thereby fixing the locking plate 12. As a result, the nut E is gripped by the tool body C, and the vertical and horizontal movements are restricted.

  Then, one end of the flexible shaft B is connected to the connection shaft 11, and the other end of the flexible shaft B is connected to the electric rotary tool A. An operator rotates the electric rotary tool A by holding the electric rotary tool A with one hand and holding the flexible shaft B with the other hand. Then, the rotation is transmitted to the connecting shaft 11, the horizontal shaft 7, and the second bevel gear 8 through the flexible shaft B, and the first bevel gear 6 and the tube 3 are rotated. The nut E gripped by the nut receiving seat 5 of the tube body 3 rotates, and the nut E moves upward or downward along the long bolt D.

  At that time, when the nut E is fitted into the nut receiving seat 5, the vertical and horizontal movements are restricted, and the nut E is not detached from the tool body C. Accordingly, since the tool body C does not come off from the nut E during the operation, the nut E can smoothly move in the vertical direction of the long bolt D if the worker holds the electric rotary tool A and the flexible shaft B by hand.

  Further, when the outer diameter or shape of the nut E screwed to the long bolt D does not match the size or shape of the nut receiving seat 5, an attachment 19 as shown in FIG. 5 can be prepared. The attachment 19 has the same outer shape as the fitting recess of the nut receiving seat 5, and has an inner peripheral diameter substantially the same as the outer shape of the nut E to be fitted and locked at the center of the attachment 19. A through hole 20 penetrating the upper and lower surfaces is provided. As shown in FIG. 6, the cross-sectional shape of the through hole 20 is not limited to a hexagonal shape, but may be a square shape, and is substantially the same as the outer shape and size of the nut to be moved along the long bolt D. I just need it.

  The attachment 19 is fitted into the nut receiving seat 5, screwed into the long bolt D, and a nut E to be moved up and down is fitted into the through hole 20 of the attachment 19. As a result, the nut E is locked to the tool main body C, and the nut E is also rotated by the rotation of the tube body 3, and the nut E moves up or down along the long bolt D. Furthermore, if a plurality of attachments 19 having different inner peripheral diameters or different inner peripheral shapes of the through holes 20 are prepared, the attachment 19 is selected in accordance with the outer diameter and shape of the nut E at the site. It is more convenient.

  Next, a second embodiment of the present invention will be described. In the second embodiment, two long bolts D are suspended in close proximity, and are used for the suspension bolts 51 and 51 when the distance between the suspension bolts 51 and 51 is short as shown in FIG. . FIG. 7 is a side view showing the usage state of the second embodiment, FIG. 8 is an exploded perspective view showing the usage state, and FIG. 9 is an explanatory diagram showing the principle of the differential gear device used in the second embodiment. is there.

  In the second embodiment, the electric rotary tool A, the flexible shaft B, and two tool bodies C are prepared, and a differential gear device F is prepared. As shown in FIG. 9, the differential gear device F includes three bevel gears 15a, 15b, and 15c. When the bevel gear 15a is rotated, the bevel gears 15b and 15c are reversely rotated. .

  The first shaft 16 connected to the bevel gear 15b is connected to the connection shaft 11 of the tool body C mounted on the nut E (not shown) of one long bolt D, and the second shaft 17 connected to the bevel gear 15c. Is connected to the connecting shaft 11 of the tool body C mounted on the nut E of the other long bolt D. Then, the third shaft 18 connected to the bevel gear 15a of the differential gear device F is connected to one end of the flexible shaft B, and the other end of the flexible shaft B is connected to the electric rotary tool A. The first shaft 16, the second shaft 17, and the third shaft 18 are each covered with a sheath tube.

  In this state, the worker holds the electric rotary tool A and the flexible shaft B and rotates the electric rotary tool A. This rotation is transmitted to the bevel gear 15a of the differential gear device F through the flexible shaft B, and is transmitted to the bevel gears 15b and 15c in reverse rotation with each other, and passes through the first shaft 16 and the second shaft 17 to each tool body. Each tube 3 of C rotates, and each nut E (not shown) rotates. Then, the two nuts E move in the same direction either up or down along each long bolt D.

  In this way, the rotation of one electric rotary tool A can be transmitted to the two nuts E, and these nuts E can be moved along the long bolts D at the same time, and therefore extremely efficient.

  In the first and second embodiments, the nut receiving seat 5 of the tool body C has a hexagonal cross section, but this cross sectional shape is not limited to this, and a nut E to be fitted such as a quadrangular shape or a polygonal shape is provided. What is necessary is just a shape locked so that rotation may be blocked | prevented. Also, a plurality of the flexible shafts B are prepared. In the second embodiment, the flexible shafts B can be used in various forms such as being connected between the differential gear device F and the two tool bodies C. Moreover, if the place which corresponds to the attachment position of the nut E of the long bolt D is previously marked with a coloring material, the attachment of the nut E can be easily and quickly performed.

It is a longitudinal cross-sectional view of the tool main body of Example 1 of this invention. It is a perspective view of the tool main body of Example 1 of this invention. It is a perspective view which shows the use condition of Example 1 of this invention. It is a longitudinal cross-sectional view in the use condition of the tool main body of Example 1 of this invention. It is a perspective view which shows the attachment and tool main body which are inserted in the nut receptacle of the tool main body of Example 1 of this invention. (X) figure and (Y) figure are respectively top views of the attachment from which the cross-sectional shape of the through-hole of Example 1 of this invention differs. It is a side view which shows the use condition of Example 2 of this invention. It is a disassembled perspective view which shows the use condition of Example 2 of this invention. It is explanatory drawing which shows the principle of the differential gear used for Example 2 of this invention. It is a perspective view of the multistage cable rack suitable for use of the tool of this invention. It is a side view of the long volt | bolt which mounts many nuts suitable for use of the tool of this invention.

A Electric rotating tool B Flexible shaft C Tool body D Long bolt E Nut F Differential gear unit 1 Casing 2a Hole
2b hole 3 tubular body 3a through hole 4 ball bearing 5 nut receiving seat 6 first bevel gear 7 horizontal shaft 8 second bevel gear 9 case 10 universal joint 11 connection shaft 12 locking plate 13 shaft 15a bevel gear 15b bevel gear 15c umbrella gear
16 1st shaft 17 2nd shaft 18 3rd shaft 19 Attachment 20 Through-hole

Claims (4)

  An electric rotary tool, a flexible shaft that transmits the rotation of the electric rotary tool to the tool, and a tool main body that locks a nut that is screwed to a long bolt. The tool main body is relative to the upper and lower surfaces of the box-shaped casing. A tube body having through holes aligned with the respective holes on the upper and lower surfaces of the casing is rotatably supported in the casing, and the upper end of the tube body is the upper surface of the casing. The through hole has an inner diameter through which the long bolt can be inserted, a stepped portion is provided in the upper end opening, and a nut receiving seat into which the nut is fitted and locked is formed. A first bevel gear is provided along the outer periphery of the tube body, a second bevel gear meshing with the first bevel gear is rotatably provided in the casing, and a horizontal shaft of the second bevel gear is connected to the casing. Free to rotate in the hole in the side wall One end of the flexible shaft can be freely connected to the tip of the horizontal shaft, and the outer edge of the upper surface of the nut inserted in the nut receiving seat is covered on the periphery of the opening of the nut receiving seat on the upper surface of the tubular body An electric nut driver, wherein one end of the locking plate is pivotally supported so as to be horizontally rotatable and fixed.   The end of the horizontal shaft is connected to one end of a connecting shaft by a universal joint capable of transmitting rotation at any angle, and the other end of the connecting shaft is connected to one end of the flexible shaft. The electric nut driver described in 1.   An attachment that can be freely fitted to the nut receiving seat is provided, and a through-hole that penetrates the upper and lower surfaces and has an inner peripheral diameter substantially the same as the outer shape of the nut to be fitted and locked is provided in the center of the attachment. The electric nut driver according to claim 1 or 2, characterized by the above. An electric rotary tool, a flexible shaft for transmitting the rotation of the electric rotary tool to the tool main body, two tool main bodies for locking each nut screwed to two parallel long bolts, and the rotation of the flexible shaft It consists of a differential gear device that transmits to two tool bodies, and each tool body is provided with holes on the upper and lower surfaces of the box-shaped casing so as to face each other, and is aligned with the holes on the upper and lower surfaces of the casing. A tubular body having a through hole is rotatably supported in the casing, and the upper end of the tubular body projects upward from the hole on the upper surface of the casing, and the through hole has an inner diameter through which the long bolt can be inserted. A nut receiving seat in which a nut is fitted and locked, and a first bevel gear is provided on the outer periphery of the tube along the outer periphery. A second bevel gear meshing with the first bevel gear is rotatably provided, a horizontal shaft of the second bevel gear is rotatably passed through a hole formed in a side wall of the casing, and the flexible shaft is inserted at a tip of the horizontal shaft. One end of the locking plate that covers the outer edge of the upper surface of the nut inserted into the nut receiving seat on the periphery of the opening of the nut receiving seat on the upper surface of the tubular body is horizontally rotatable and fixed. It is configured to freely support, and a nut that is screwed to the long bolt is fitted into a nut receiving seat of each tool body, and the top surface of each nut is covered with each locking tool, and the horizontal shaft of each tool body The left and right shafts of the differential gear device are connected to each other, one end of the flexible shaft is connected to the central shaft of the differential gear device, and the other end of the flexible shaft is connected to the center shaft of the differential gear device. Characterized by being freely connected to the serial electric rotating tool, electric nut driver tool.