Wrench holding jig

Abstract

To suppress detachment of a wrench from a fastening member without using a screw shaft (screw groove) of a bolt.SOLUTION: A wrench holding jig, which holds a head part of a wrench in the state that the head part engages with a fastening member, has: a magnet jig which is adsorbed to the fastening member by magnetic force; and a presser jig which gives a pressing force to the head part. The magnet jig has a magnet part which is adsorbed to a part of the fastening member exposed inside the head part, and a screw shaft fixed to the magnet part. The presser jig has a body part which can accommodate the magnet part and gives a pressing force, and a screw part engaging with the screw shaft, and can move along the screw shaft penetrating the body part.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a wrench holding jig that holds a wrench in a state where the wrench is engaged with a fastening member. [Background technology]

[0002] Patent Documents 1 to 4 disclose jigs that prevent a wrench from coming off a nut or the like. In Patent Document 1, a clip is engaged with the screw shaft protruding from a nut in a state where the wrench is engaged with the nut that engages with the screw shaft of the bolt. This allows the wrench to be clamped between the clip and the member tightened by the bolt, preventing the wrench from coming off.

[0003] In Patent Document 2, a wrench is engaged with a nut that meshes with the bolt, and a wrench holder jig is screwed onto the tip of the bolt. Here, the pressing part of the wrench holder jig presses the side part of the wrench, preventing the wrench from coming off.

[0004] In Patent Document 3, a wrench is engaged with a nut that meshes with the threaded shaft of a bolt, and a jig is attached to the threaded shaft protruding from the nut. Here, the jig has a pair of clamping parts that clamp the shank of the bolt, and this jig prevents the wrench from coming off.

[0005] In Patent Document 4, a wrench is engaged with a nut that meshes with the screw shaft of a bolt, and a jig is attached to the screw shaft protruding from the nut. Here, the jig has a pair of clamping members for clamping the screw shaft and a pressing member that presses each clamping member toward the screw shaft, and this jig prevents the wrench from coming off. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-120097 [Patent Document 2] Patent No. 5577123 [Patent Document 3] Patent No. 5960584 [Patent Document 4] Patent No. 5963659 Summary of the Invention [Problem to be solved by the invention]

[0007] In all of Patent Documents 1 to 4, a jig is attached to the screw shaft (i.e., the screw groove) protruding from the nut. An object of the present invention is to provide a jig that prevents a wrench from coming off a fastening member without using the screw shaft (thread groove) of a bolt. [Means for solving the problem]

[0008] The present invention provides a wrench holding jig that holds a wrench head when the head is engaged with a fastener, and includes a magnetic jig that is attracted to the fastener by magnetic force and a pressing jig that applies a pressing force to the head. Here, the magnetic jig has a magnet portion that is attracted to a portion of the fastener exposed inside the head, and a screw shaft fixed to the magnet portion. The pressing jig has a main body portion that can accommodate the magnet portion and applies the pressing force, and a threaded portion that engages with the screw shaft, and is movable along the screw shaft that passes through the main body.

[0009] When the wrench engages with the head of a bolt as a fastening member, the magnet part can be attached to the head of the bolt. On the other hand, when the wrench engages with a nut as a fastening member, the magnet part can be attached to the tip surface of the shank of the bolt that meshes with the nut. When the magnet part is attached to the tip surface of the shank of the bolt, the magnet part and the shank of the bolt can be housed in the main body.

[0010] The holding jig may be provided with a flange that contacts the wrench and applies a pressing force to the wrench. The holding jig may also be provided with a nut that is fixed to the main body and has a threaded portion formed on its inner peripheral surface. [Effects of the Invention]

[0011] According to the present invention, the wrench holding jig can be positioned by attracting the magnetic jig to the fastening member. Then, with the wrench holding jig positioned, the holding jig can be moved along the screw axis of the magnetic jig to apply a pressing force to the head portion and hold the head portion. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is an external view showing a wrench holding jig according to a first embodiment. FIG. [Figure 2] FIG. 2 is an external view showing a pressing jig in the first embodiment. [Figure 3] FIG. 2 is an external view showing the magnet jig in the first embodiment. [Figure 4] FIG. 2 is an exploded perspective view showing a state before the wrench holding jig holds a wrench in the first embodiment. [Figure 5] FIG. 2 is a perspective view showing a state in which a wrench is held by a wrench holding jig in the first embodiment. [Figure 6] FIG. 10 is an external view showing a wrench holding jig according to a second embodiment. [Figure 7] FIG. 10 is an external view showing a pressing jig in a second embodiment. [Figure 8] FIG. 10 is an external view showing a magnet jig according to a second embodiment. [Figure 9] FIG. 10 is an exploded perspective view showing a state before the wrench holding jig holds a wrench in the second embodiment. [Figure 10] FIG. 10 is a perspective view showing a state in which the wrench holding jig holds a wrench in the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0013] (First embodiment) The wrench holding jig of this embodiment is used to hold a wrench in a state where the wrench is engaged with the head of a bolt (fastening member). The structure of the wrench holding jig will be described with reference to Figs. 1 to 3.

[0014] 1, wrench holding jig 10A has a pressing jig 20 and a magnetic jig 30. Pressing jig 20 is used to press and hold the wrench, and magnetic jig 30 is used to position wrench holding jig 10A relative to the head of the bolt with which the wrench engages.

[0015] 2, the holding jig 20 has a hollow main body 21, which has a side surface formed along the circumferential direction and an upper surface that closes one end of the side surface. A part of the magnet jig 30 (a magnet portion 31 described later) can be accommodated in the space formed inside the main body 21, as shown in FIG.

[0016] A through hole 22 is formed in the upper surface of the main body 21, and a screw shaft 33 of a magnetic jig 30 shown in FIG. 3 passes through the through hole 22. Here, the screw shaft 33 simply passes through the through hole 22 and does not mesh with the through hole 22. A nut portion 23 is fixed to the outer surface of the main body 21 at a position corresponding to the through hole 22, and a screw groove is formed on the inner peripheral surface of the nut portion 23. The screw groove of the nut portion 23 meshes with the screw shaft 33 that passes through the through hole 22.

[0017] In this embodiment, the thread groove that engages with the screw shaft 33 is formed in the nut portion 23, but this is not limited to this. For example, the thread groove that engages with the screw shaft 33 can be formed in the through hole 22. In this case, the nut portion 23 may be omitted. On the other hand, if it is difficult to form a thread groove in the through hole 22, the nut portion 23 can be used as in this embodiment.

[0018] A flange portion 24 is provided on the underside of main body portion 21, and flange portion 24 is formed in a ring shape along the side portion of main body portion 21. As will be described later, when a wrench is held by wrench holding jig 10A, flange portion 24 comes into contact with the head of the wrench. Note that flange portion 24 can be omitted, and when flange portion 24 is omitted, the lower end surface of main body portion 21 can also come into contact with the head of the wrench to hold the wrench.

[0019] An insertion opening 25 is formed on the inside of the flange portion 24 for inserting the magnet jig 30 into the inside of the holding jig 20. The insertion opening 25 may have any size as long as it can insert the magnet portion 31 of the magnet jig 30.

[0020] 3, the magnetic jig 30 has a disk-shaped magnet portion 31, the underside of which is attracted to the head of the bolt by magnetic force, as will be described later. The entire magnet portion 31 can be made of a magnet, or only a portion of the magnet portion 31 can be made of a magnet. In order to attract the underside of the magnet portion 31 to the head of the bolt, at least the portion that comes into contact with the head of the bolt can be made of a magnet.

[0021] A nut portion 32 is fixed to the upper surface of the magnet portion 31, and a thread groove formed on the inner peripheral surface of the nut portion 32 engages with the screw shaft 33. By engaging the base end of the screw shaft 33 with the nut portion 32, the screw shaft 33 can be fixed to the magnet portion 31 via the nut portion 32.

[0022] A through-hole (not shown) can be formed in the magnet part 31, and the screw shaft 33 can be inserted into this through-hole. Here, to prevent the screw shaft 33 from slipping out of the through-hole, a retaining flange can be formed at the base end of the screw shaft 33, and a recess that engages with the retaining flange can be formed on the underside of the magnet part 31. This allows the magnet part 31 to be sandwiched between the retaining flange and the nut part 32, and the screw shaft 33 can be fixed to the magnet part 31.

[0023] In addition, in this embodiment, the screw shaft 33 is fixed to the magnet part 31 via the nut part 32, but any structure may be used as long as the screw shaft 33 can be fixed to the magnet part 31. For example, the magnet part 31 and the screw shaft 33 may be integrally formed, or a screw groove may be formed on the upper surface of the magnet part 31 and the base end of the screw shaft 33 may be engaged with this screw groove.

[0024] Wrench holding jig 10A can be assembled as described below.

[0025] First, the magnetic jig 30 is inserted through the insertion port 25 of the holding jig 20, and the screw shaft 33 is inserted into the through hole 22 of the holding jig 20. Then, the screw shaft 33 that has passed through the through hole 22 is engaged with the thread groove of the nut portion 23. When the screw shaft 33 and the nut portion 23 are engaged with each other, the holding jig 20 and the magnetic jig 30 are rotated relative to each other around the axis of the screw shaft 33, so that the tip of the screw shaft 33 penetrates the nut portion 23 and protrudes outside the holding jig 20. Here, by changing the engagement position of the nut portion 23 with respect to the screw shaft 33, the relative positions of the holding jig 20 and the magnetic jig 30 can be changed in the axial direction of the screw shaft 33.

[0026] Next, a method of using the wrench holding jig 10A will be described with reference to FIGS.

[0027] 4, a bolt (fastening member) 200 is used to fasten two fastened members 300 together. A nut (not shown) is engaged with the threaded shaft of the bolt 200, and the two fastened members 300 are sandwiched and fastened together by the head of the bolt 200 and the nut. Furthermore, if a threaded portion that engages with the threaded shaft of the bolt 200 is formed on the fastened members 300, the two fastened members 300 can be fastened together using only the bolt 200.

[0028] The wrench 100 is used to tighten or loosen the bolt 200. Specifically, with the head portion 110 of the wrench 100 engaged with the head of the bolt 200, the bolt 200 can be tightened by rotating the wrench 100 clockwise, and the bolt 200 can be loosened by rotating the wrench 100 counterclockwise.

[0029] The wrench holding jig 10A holds the head portion 110 of the wrench 100 so that the wrench 100 does not come off the head of the bolt 200 when the head portion 110 of the wrench 100 is engaged with the head of the bolt 200 .

[0030] When head portion 110 of wrench 100 is engaged with the head of bolt 200, the head of bolt 200 is exposed inside head portion 110, and magnet portion 31 of magnetic jig 30 can be attracted to the head by magnetic force. When attracting magnet portion 31 to the head of bolt 200, having magnet portion 31 protrude from the underside of holding jig 20 makes it easier to attract magnet portion 31 to the head of bolt 200. By attracting magnet portion 31 to the head of bolt 200, wrench holding jig 10A can be positioned relative to bolt 200.

[0031] When the head portion 110 of the wrench 100 is engaged with the head of the bolt 200, the head of the bolt 200 may or may not protrude from the head portion 110. If the head of the bolt 200 does not protrude from the head portion 110, the size of the magnet portion 31 can be determined so that the magnet portion 31 is disposed inside the head portion 110 and is attracted to the head of the bolt 200.

[0032] After magnet portion 31 is attracted to the head of bolt 200, holding jig 20 can be moved along screw shaft 33 by rotating holding jig 20 relative to screw shaft 33, and holding jig 20 can be brought closer to wrench 100. Then, as shown in Fig. 5, flange portion 24 of holding jig 20 is brought into contact with head portion 110 to press down head portion 110, thereby holding wrench 100.

[0033] The flange portion 24 of the holding jig 20 presses down on the head portion 110, so that the head portion 110 is sandwiched between the flange portion 24 and the workpiece 300. Here, the shape of the flange portion 24 (in other words, the holding jig 20) can be determined taking into account the shape of the head portion 110 so that the flange portion 24 can press down on only the head portion 110.

[0034] As described above, by holding the wrench 100 with the wrench holding jig 10A, the wrench 100 can be operated while preventing the wrench 100 from coming off the bolt 200. Here, to make it easier to operate the wrench 100, the pressing force of the flange portion 24 against the head portion 110 can be adjusted by adjusting the position of the holding jig 20 in the axial direction of the screw shaft 33.

[0035] When the tightening or loosening operation of bolt 200 using wrench 100 is completed, wrench holding jig 10A can be removed. Specifically, after pressing jig 20 is moved along screw shaft 33 so that flange portion 24 moves away from head portion 110, wrench holding jig 10A (specifically, magnet jig 30) is tilted relative to the head of bolt 200. This releases the attraction of magnet portion 31 to bolt 200, allowing wrench holding jig 10A to be easily removed.

[0036] (Second embodiment) The wrench holding jig of this embodiment is used to hold a wrench in a state where the wrench is engaged with a nut (fastening member) that engages with the shank of a bolt. The structure of the wrench holding jig will be described with reference to Figs. 6 to 8.

[0037] 6, wrench holding jig 10B has a pressing jig 40 and a magnetic jig 50. Pressing jig 40 is used to press and hold the wrench, and magnetic jig 50 is used to position wrench holding jig 10B with respect to the bolt that meshes with the nut that the wrench engages with.

[0038] 7, the holding jig 40 has a hollow main body 41, which has a side surface formed along the circumferential direction and an upper surface that closes one end of the side surface. A part of the magnet jig 50 (a magnet portion 51 described later) can be accommodated in the space formed inside the main body 41, as shown in FIG.

[0039] A through hole 42 is formed in the upper surface of the main body 41, and a screw shaft 53 of a magnet jig 50 shown in FIG. 8 passes through the through hole 42. Here, the screw shaft 53 simply passes through the through hole 42 and does not engage with the through hole 42. A nut portion 43 is fixed to the outer surface of the main body 41 at a position corresponding to the through hole 42, and a screw groove is formed on the inner peripheral surface of the nut portion 43. The screw groove of the nut portion 43 engages with the screw shaft 53 that passes through the through hole 42.

[0040] In this embodiment, the thread groove that engages with the screw shaft 53 is formed in the nut portion 43, but this is not limited to this. For example, the thread groove that engages with the screw shaft 53 can be formed in the through hole 42. In this case, the nut portion 43 may be omitted. On the other hand, if it is difficult to form a thread groove in the through hole 42, the nut portion 43 can be used as in this embodiment.

[0041] A flange 44 is provided on the underside of the main body 41, and the flange 44 is formed in a ring shape along the side surface of the main body 41. As will be described later, when a wrench is held by the wrench holding jig 10B, the flange 44 comes into contact with the head of the wrench. Note that the flange 44 can be omitted, and when the flange 44 is omitted, the lower end surface of the main body 41 can also come into contact with the head of the wrench to hold the wrench.

[0042] An insertion opening 45 is formed on the inside of the flange portion 44 to allow the magnet jig 50 to be inserted into the inside of the holding jig 40. The insertion opening 45 may have any size as long as it can accommodate the magnet portion 51 of the magnet jig 50.

[0043] As shown in Figure 8, magnetic jig 50 has a cylindrical magnet portion 51, the underside of which is attracted to the tip surface of the bolt shank by magnetic force, as will be described later. Here, magnet portion 51 can be made entirely of a magnet, or only a portion of magnet portion 51 can be made of a magnet. In order to attract the underside of magnet portion 51 to the tip surface of the bolt shank, at least the portion that comes into contact with the bolt shank can be made of a magnet.

[0044] A nut portion 52 is fixed to the upper surface of the magnet portion 51, and a thread groove formed on the inner peripheral surface of the nut portion 52 engages with the screw shaft 53. By engaging the base end of the screw shaft 53 with the nut portion 52, the screw shaft 53 can be fixed to the magnet portion 51 via the nut portion 52.

[0045] A recess (not shown) can be formed on the upper surface of the magnet portion 51, and the base end of the screw shaft 53 can be inserted into this recess. This allows the screw shaft 53 to be fixed to the magnet portion 51 in a state where the screw shaft 53 passes through the nut portion 52. In addition, in this embodiment, the screw shaft 53 is fixed to the magnet portion 51 via the nut portion 52, but any structure is acceptable as long as the screw shaft 53 can be fixed to the magnet portion 51. For example, the magnet portion 51 and the screw shaft 53 can be formed integrally, or a screw groove can be formed on the upper surface of the magnet portion 51, and the base end of the screw shaft 53 can be engaged with this screw groove.

[0046] The wrench holding jig 10B can be assembled as described below.

[0047] First, the magnetic jig 50 is inserted through the insertion port 45 of the holding jig 40, and the screw shaft 53 is inserted into the through hole 42 of the holding jig 40. Then, the screw shaft 53 that passes through the through hole 42 is engaged with the thread groove of the nut portion 43. When the screw shaft 53 and the nut portion 43 are engaged, the holding jig 40 and the magnetic jig 50 are rotated relative to each other around the axis of the screw shaft 53, so that the tip of the screw shaft 53 penetrates the nut portion 43 and protrudes outside the holding jig 40. Here, by changing the engagement position of the nut portion 43 with respect to the screw shaft 53, the relative positions of the holding jig 40 and the magnetic jig 50 can be changed in the axial direction of the screw shaft 53.

[0048] Next, a method of using the wrench holding jig 10B will be described with reference to FIGS.

[0049] 9, the shank of a bolt (fastening member) 400 passes through two fastened members 300, and a nut (fastening member) 500 is engaged with the tip end of the shank of the bolt 400. The bolt 400 and the nut 500 are used to fasten the two fastened members 300 together, and the two fastened members 300 are clamped and fixed by the head (not shown) of the bolt 400 and the nut 500.

[0050] The wrench 100 is used to tighten and loosen the nut 500. Specifically, with the head portion 110 of the wrench 100 engaged with the nut 500, the nut 500 can be tightened by rotating the wrench 100 clockwise, and the nut 500 can be loosened by rotating the wrench 100 counterclockwise.

[0051] The wrench holding jig 10B holds the head portion 110 of the wrench 100 so that the wrench 100 does not come off the nut 500 when the head portion 110 of the wrench 100 is engaged with the nut 500 .

[0052] When head portion 110 of wrench 100 is engaged with nut 500, the shank of bolt 400 is exposed inside head portion 110, and magnet portion 51 of magnetic jig 50 can be attracted to the tip surface of this shank by magnetic force. When attracting magnet portion 51 to the shank of bolt 400, having magnet portion 51 protrude from the underside of holding jig 40 makes it easier to attract magnet portion 51 to the shank of bolt 400. By attracting magnet portion 51 to the shank of bolt 400, wrench holding jig 10B can be positioned relative to bolt 400.

[0053] When the head portion 110 of the wrench 100 is engaged with the nut 500 , the shank of the bolt 400 may protrude from the head portion 110 or may be at a height that is approximately the same as that of the nut 500 .

[0054] After magnet portion 51 is attracted to the shaft portion of bolt 400, holding jig 40 can be moved along screw shaft 53 by rotating holding jig 40 relative to screw shaft 53, and holding jig 40 can be brought closer to wrench 100. Then, as shown in Fig. 10, flange portion 44 of holding jig 40 is brought into contact with head portion 110 to press down on head portion 110, thereby holding wrench 100.

[0055] Here, in order to press the flange portion 44 against the head portion 110, it is necessary to ensure a certain amount of movement of the holding jig 40 when the magnet portion 51 and the shank of the bolt 400 are housed inside the main body portion 41 of the holding jig 40. For this reason, in this embodiment, as shown in Fig. 6, the height of the main body portion 41 (the length in the vertical direction in Fig. 6) is made higher than the height of the magnet portion 51. For example, when the magnet jig 50 is attracted to the shank of the bolt 400 in the position shown in Fig. 6, the upper surface of the main body portion 41 is separated from the magnet portion 51, and therefore the holding jig 40 can be moved by this distance.

[0056] The flange portion 44 of the holding jig 40 presses down on the head portion 110, so that the head portion 110 is sandwiched between the flange portion 44 and the workpiece 300. Here, the shape of the flange portion 44 (in other words, the holding jig 40) can be determined taking into account the shape of the head portion 110 so that the flange portion 44 can press down on only the head portion 110.

[0057] As described above, by holding the wrench 100 with the wrench holding jig 10B, the wrench 100 can be operated while preventing the wrench 100 from coming off the nut 500. Here, to make it easier to operate the wrench 100, the pressing force of the flange portion 44 against the head portion 110 can be adjusted by adjusting the position of the holding jig 40 in the axial direction of the screw shaft 53.

[0058] When the tightening or loosening operation of nut 500 using wrench 100 is completed, wrench holding jig 10B can be removed. Specifically, after pressing jig 40 is moved along screw shaft 53 so that flange portion 44 moves away from head portion 110, wrench holding jig 10B (specifically, magnet jig 50) is tilted with respect to the shaft portion of bolt 400. This releases the attraction of magnet portion 51 to bolt 400, allowing wrench holding jig 10B to be easily removed. [Explanation of symbols]

[0059] 10A, 10B: wrench holding jig, 20, 40: holding jig, 21, 41: main body, 22, 42: through hole, 23, 43: nut portion, 24, 44: flange portion, 25, 45: Insertion port, 30, 50: Magnet jig, 31, 51: Magnet part, 32, 52: Nut part, 33, 53: Screw shaft, 100: Wrench, 110: Head part, 200, 400: Bolt, 300: Fastened part, 500: Nut

Claims

1. A wrench holding jig for holding a head portion of a wrench in a state in which the head portion is engaged with a fastening member, a magnetic jig that is attracted to the fastening member by magnetic force; a pressing jig that applies a pressing force to the head portion, The magnetic jig has a magnet portion that is attracted to a part of the fastening member exposed inside the head portion, and a screw shaft fixed to the magnet portion, The wrench holding jig has a main body portion that can accommodate the magnet portion and apply the pressing force, and a threaded portion that engages with the screw shaft, and is characterized in that it is movable along the screw shaft that passes through the main body portion.

2. 2. The wrench holding jig according to claim 1, wherein when the wrench engages with the head of a bolt serving as the fastening member, the magnet portion is attracted to the head of the bolt.

3. 2. The wrench holding jig according to claim 1, wherein when the wrench engages with a nut as the fastening member, the magnet portion is attracted to the tip surface of the shank of the bolt that engages with the nut.

4. 4. The wrench holding jig according to claim 3, wherein the main body is capable of accommodating the magnet and the shank of the bolt.

5. 2. The wrench holding jig according to claim 1, wherein the holding jig has a flange portion that contacts the wrench and applies the pressing force to the wrench.

6. 2. The wrench holding jig according to claim 1, wherein the pressing jig has a nut portion fixed to the main body portion and having the threaded portion formed on an inner peripheral surface thereof.

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