Attachment

Abstract

To provide an attachment that can prevent a washer arranged closer to a depth side than a nut when viewed from a rotary tool side from corotating, when fastening the nut using the rotary tool.SOLUTION: An attachment 1, which is attached to a rotary tool 65 that rotates a socket 64 that is fitted to a nut 63 to fasten the nut 63 onto a male screw part 61a of a bolt member 61, is configured to contact a washer 62, arranged closer to a depth side than the nut 63 when viewed from the rotary tool 65, which can move along the male screw part 61a while being penetrated into the male screw part 61a, when fastening the nut 63 using the rotary tool 65.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an attachment that is attached to a rotary tool that tightens a nut onto a male thread of a bolt member by rotating a socket that fits onto the nut, for example. [Background technology]

[0002] 6(A) and (B), the wooden formwork used for pouring concrete is composed of sheathing (concrete panels) 51 for shaping the concrete to be poured, separators 52 for maintaining the spacing between the sheathing 51, cones (P cones) 53 that are screwed to both ends of the separators 52 and support the sheathing 51 from the inside, battens 54 (vertical battens 54A and horizontal battens 54B) that hold the sheathing 51 from the outside to prevent it from warping due to the lateral pressure of the concrete C poured inside the sheathing 51, and screw-type fasteners 55 that are screwed to the cones 53 from the outside of the sheathing 51 and fasten the horizontal battens 54B (the batten 54 on the side farther from the sheathing 51). The vertical batten 54A (the batten 54 on the side closer to the sheathing 51) is fixed to the sheathing 51 in advance by adhesive or other means.

[0003] However, when a conventional screw-type fastener 55 is used, which is a screw-type form tie (registered trademark) that includes a bolt (an example of a bolt member) 56 that is screwed into the cone 53, a vertically elongated washer (butterfly material holding member) 57 that is inserted through the bolt 56 and can move along the bolt 56, and has a shape that allows it to hold (press-fit) the horizontal flap 54B, and a nut 58 that screws onto the bolt 56, in order to tighten the horizontal flap 54B with this, it is necessary to support the horizontal flap 54B and the washer 57 with one hand while tightening the nut 58 with the other hand, which poses a problem that it is difficult to simplify the tightening process.

[0004] Therefore, the present applicant has proposed an improved screw-type fastener 60 as shown in Figures 7(A) and (B) and Figure 8(B) (see Patent Document 1). That is, this screw-type fastener 60 includes a bolt (an example of a bolt member) 61, a washer (butterfly material holding member) 62 that is elongated as a whole and that is shaped so that it can move along the male thread portion 61a of the bolt 61 while being inserted through the male thread portion 61a of the bolt 61 and can hold (press-weld) the horizontal bolt 54B, and a nut 63 that screws onto the male thread portion 61a of the bolt 61. In this screw-type fastener 60, as shown in Figures 7(C) and (D), a thin-walled tubular portion 63a is provided that extends cylindrically from the bottom surface of the nut 63, and the tubular portion 63a is passed through a through-hole 62a provided in the center of the washer 62 and crimped, thereby connecting the nut 63 to the washer 62 so as to be freely rotatable.

[0005] The horizontal flap 54B can be fastened using the screw-type fastener 60 as follows. First, as shown in FIG. 8(A), the female thread (not shown) at the tip of the bolt 61 is threaded onto the male thread 53a of the cone 53 extending through the sheathing board 51. The washer 62 and nut 63 may be attached to the male thread portion 61a of the bolt 61 during this threading, or they may be attached after the threading. Next, while supporting the horizontal flap 54B with one hand, the nut 63 is rotated with the other hand in a direction that tightens the nut 63 onto the male thread portion 61a of the bolt 61, thereby fastening the horizontal flap 54B with the washer 62 connected to the nut 63. This fastening can be easily performed by using a rotary tool (such as an impact driver) 65, which has a socket (socket bit) 64 that fits onto the nut 63 and can rotate the socket 64 to tighten the nut 63, as shown in FIG. 8(C). [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 7335604 Summary of the Invention [Problem to be solved by the invention]

[0007] However, when tightening the nut 63 using the rotary tool 65, although the nut 63 is free to rotate relative to the washer 62, the washer 62 may also rotate together with the nut 63. If such co-rotation occurs, there is a concern that this may result in a decrease in the efficiency of the tightening work of the horizontal flap 54B using the screw-type fastener 60.

[0008] The present invention has been made with the above-mentioned points in mind, and its purpose is to provide an attachment that can prevent co-rotation of a washer that is located further back than the nut when viewed from the rotary tool side when tightening the nut with the rotary tool. [Means for solving the problem]

[0009] In order to achieve the above object, the attachment of the present invention is an attachment that is attached to a rotary tool that rotates a socket that fits into the nut to tighten the nut into the male thread portion of a bolt member, and is configured so that when the nut is tightened using the rotary tool, it comes into contact with a washer that is located further back than the nut when viewed from the rotary tool side and that is capable of moving along the male thread portion while being inserted into the male thread portion (Claim 1).

[0010] In the above attachment, the portion that comes into contact with the washer may be configured by a claw portion (claim 2).

[0011] The attachment may include a length adjustment mechanism at a portion integrated with the claw portion (claim 3).

[0012] The attachment may have a locking portion that is locked to a location on the rotary tool other than the socket (claim 4). [Effects of the Invention]

[0013] The present invention provides an attachment that can prevent co-rotation of a washer located behind the nut when viewed from the rotary tool side, when the nut is tightened using the rotary tool.

[0014] In other words, the attachment according to the invention of each claim of the present application can prevent the washer from rotating together with the nut by contacting the washer.

[0015] In the attachment of the invention according to claim 2, by providing a claw that engages with the washer, it is possible to reliably prevent the washer from rotating together with the other washer, and it also makes it easier to align the washer's orientation, which contributes to improving workability if the washer's orientation can be aligned using only the rotary tool to which the attachment is attached. In addition, the gaps formed around the claws increase the visibility of the washer, nut, and other installation points, which also contributes to improving workability.

[0016] In the attachment of the invention according to claim 3, the length adjustment mechanism can accommodate different lengths of sockets of rotary tools.

[0017] The attachment of the invention according to claim 4 is engaged with a location on the rotary tool other than the rotating socket, and this engagement makes it possible to resist the rotational force of the socket, making it easy to maintain a good contact state with the washer to prevent co-rotation. [Brief explanation of the drawings]

[0018] [Figure 1] 1A is a front view showing a state in which an attachment according to an embodiment of the present invention is attached to a rotary tool, and FIG. 1B is a vertical cross-sectional view of the attachment. [Figure 2] 1A and 1B are a plan view and a left side view of the attachment. [Figure 3] (A) and (B) are photographs showing the prototype of the attachment attached to a rotary tool (although they were taken from different angles), and (C) is a photograph showing the prototype removed from the rotary tool shown in (A). [Figure 4] Photographs (A) and (B) show the process of attaching the prototype to a rotary tool, and (C) is a photograph showing a part of the prototype disassembled. [Figure 5](A) to (C) are photographs showing the state of the prototype when in use. [Figure 6] 1A and 1B are a perspective view and a longitudinal sectional view showing a schematic configuration of a conventional wooden formwork. [Figure 7] (A) and (B) are a front view and a perspective view of the main part of an improved screw-type fastener that can be used with conventional wooden formwork, and (C) and (D) are explanatory diagrams showing the process of fixing the nut of the improved screw-type fastener to a washer. [Figure 8] (A) is an explanatory diagram showing the improved screw-type fastener in use, and (B) and (C) are photographs showing the configuration of an example of the improved screw-type fastener and how it is used. DETAILED DESCRIPTION OF THE INVENTION

[0019] An embodiment of the present invention will be described below.

[0020] 1 and 2, as shown in Fig. 1(A), is used by being attached to a rotary tool 65 together with a socket 64. Below, the attachment 1 and rotary tool 65 will be described with reference to Figs. 3 to 5, which show photographs of a prototype of the attachment 1 and the actual rotary tool 65. Note that in this specification, the terms "front, back," and "top and bottom" refer to the left and right directions and top and bottom directions, respectively, when viewing the attachment 1 and rotary tool 65 as shown in Fig. 1(A).

[0021] First, the rotary tool 65 shown in Figures 1(A), 3(A), (B), 4(A), (B) will be described. Like the rotary tool 65 shown in Figure 8(C), this rotary tool 65 is an impact driver, and a socket (socket bit) 64 for nuts is detachably attached to a sleeve 65a on the upper front side of the tool. When the socket 64 is attached to the sleeve 65a (see Figure 3(C)), pressing an operation button 65b (see Figure 1(A)) provided on the front center side of the socket 64 allows the socket 64 to rotate around its axis.

[0022] Incidentally, as shown in Figure 8(C), for example, to tighten the horizontal flap 54B using the improved screw-type fastener 60, it is only necessary to tighten the nut 63 (see Figure 8(B)) of the screw-type fastener 60 onto the male thread portion 61a (see Figure 8(B)) of the bolt member 61. This tightening causes the washer 62 integrated with the nut 63 to move in a direction approaching the sheathing board 51, and eventually the tightening of the horizontal flap 54B by the washer 62 (screw-type fastener 60) is completed.

[0023] This tightening operation can be easily performed by using a rotary tool 65. Specifically, when the operation button 65b is pressed with the socket 64 of the rotary tool 65 fitted into the nut 63 (see FIG. 8(B)) of the screw-type fastener 60, the socket 64 rotates, and the nut 63 is tightened onto the male thread portion 61a of the bolt member 61 (see FIG. 8(B)).

[0024] However, as mentioned above, although the washer 62 is freely rotatable relative to the nut 63, the washer 62 may rotate together when the nut 63 is rotated using the socket 64. If such co-rotation occurs, there is a concern that this may result in a decrease in the efficiency of the tightening work of the horizontal flap 54B using the screw-type fastener 60.

[0025] The attachment 1 is designed to eliminate such concerns. When tightening the nut 63 using a rotary tool 65, if the attachment 1 is attached to the rotary tool 65 as shown in Figures 1(A), 3(A), (B), and 4(B), the attachment 1 will come into contact with the washer 62, which is located further back than the nut 63 when viewed from the rotary tool 65 side and is able to move along the male thread portion 61a while being inserted through the male thread portion 61a (see Figures 5(A) to (C)). This contact prevents the washer 62 from rotating together with the nut 63.

[0026] Below, we will explain in detail the configuration of this attachment 1. First, as shown in Figure 4(C), the attachment 1 can be separated into the control tube 2 and the leg portion 3, and as shown in Figures 1(A), (B), 2(A), (B), 3(A), (B), 4(A), (B), the two can be connected together 2, 3.

[0027] As shown in Fig. 1(B), the control cylinder 2 has a cylindrical main body 4 with a substantially uniform thickness throughout, and this main body 4 is provided, in this order from the front to the rear, with a large diameter portion 4a, a narrowed portion 4b that narrows toward the rear, and a small diameter portion 4c. As also shown in Figs. 1(A), 2(A), and (B), a curved plate portion 5 that follows the outer surface of the large diameter portion 4a is integrally formed at the bottom of the large diameter portion 4a, and the curved plate portion 5 extends from a position slightly rearward from the front end of the large diameter portion 4a, past the narrowed portion 4b, toward the rear, to near the rear end of the small diameter portion 4c (a position slightly forward from the rear end of the small diameter portion 4c), and grooves 6 (see Fig. 1(B)) are present between the curved plate portion 5 and the narrowed portion 4b and small diameter portion 4c. In this example, the curved plate portion 5 is integrally molded with the main body 4, but this is not limited to this. For example, the curved plate portion 5 may be molded separately from the main body 4 and then integrated with the main body 4 by an appropriate joining means such as adhesion or welding.

[0028] As shown in Figures 1(A), (B), 2(A), (B), and 3(A), a total of four (one example of multiple) claw portions 7 protrude forward from the front edge of the main body 4, and these claw portions 7 are spaced (equally spaced) apart in the circumferential direction.

[0029] On the other hand, as shown in Figures 1(A), (B), 2(A), and (B), the leg portion 3 has a cylindrical connection portion 8 to which the main body 4 of the operating tube 2 is connected, and a forked-shaped holding portion 9 that extends rearward and diagonally downward from this connection portion 8.

[0030] As shown in FIG. 1(B), the small diameter portion 4c of the control tube 2 is inserted into the connecting portion 8 from its front side, with the lower portion of the connecting portion 8 entering the groove 6. The upper portion of the connecting portion 8 is provided with a screw 10 for adjusting the length of the control tube 2 and a threaded hole 11 into which the screw 10 screws. By tightening the screw 10 and pressing the tip of the screw 10 against the outer surface of the small diameter portion 4c of the main body 4 inserted inside the connecting portion 8, the main body 4 becomes unable to slide relative to the connecting portion 8, and in this state the overall length of the control tube 2 is fixed. By loosening the screw 10, the main body 4 becomes slidable longitudinally relative to the connecting portion 8, and this sliding allows the overall length of the control tube 2 to be changed. In other words, the small diameter portion 4c, connecting portion 8, screw 10, and threaded hole 11 constitute a length adjustment mechanism for adjusting the length of the control tube 2.

[0031] As shown in Figures 2(A) and 2(B), the holding portion 9 has two support shafts 12 whose front ends are fixed to the left and right side surfaces of the connecting portion 8, a reinforcing shaft 13 that connects the middle portions of the two support shafts 12, and a U-shaped plate-shaped locking portion 14 to which the rear ends of the two support shafts 12 are fixed. As shown in Figures 3(A), (B) and 4(B), the locking portion 14 is a portion that is brought into contact with and locks onto approximately half the circumference of the front side of the handle portion 65c of the rotary tool 65 when the attachment 1 is attached to the rotary tool 65. Note that the support shafts 12 may be fixed to the left and right side surfaces of the connecting portion 8 by a joining means such as adhesive or welding, or by integrally molding the connecting portion 8 and the support shafts 12.

[0032] To mount the attachment 1 configured as described above on the rotary tool 65, the socket 64 removed from the sleeve 65a is inserted into the main body 4 of the operating tube 2 from the front side (see FIG. 4(C)), and the socket 64 is mounted on the sleeve 65a while passing through the main body 4 and the connecting portion 8 to which the main body 4 is connected. At this time, the mounting of the socket 64 on the sleeve 65a can be easily performed while visually checking the rear portion, because the rear portion of the socket 64 has passed through the connecting portion 8 and is exposed behind it, as shown in FIGS. 1(A), 4(A), and (B).

[0033] 1(A), the front portion 64a of the socket 64 has a larger outer diameter than the portions behind it (the central portion 64b and the shaft portion 64c), and the portions of the socket 64 other than the front portion 64a can be inserted from the large diameter portion 4a (see FIG. 1(B)) side of the main body 4 and inserted into the small diameter portion 4c (see FIG. 1(B)). However, the front portion 64a is configured so that it can be inserted into the large diameter portion 4a but cannot be inserted into the small diameter portion 4c. Therefore, when the socket 64, which is designed so that the entire socket does not pass through the main body 4, is attached to the sleeve 65a of the rotary tool 65, the attachment 1 will be held without falling out of the socket 64 (without slipping out in front of the socket 64).

[0034] When the attachment 1 is attached to the rotary tool 65 as described above, the locking portion 14 of the leg portion 3 abuts and locks onto the handle portion 65c of the rotary tool 65, so that when the handle portion 5c is gripped together with the locking portion 14 that covers approximately half of its front surface and the operation button 65b of the rotary tool 65 is pressed to rotate the socket 64, even if a rotational force is applied to the control tube 2 in contact with the socket 64, the rotational force is received by the handle portion 65c of the rotary tool 65 via the leg portion 3 (locking portion 14) connected to the control tube 2, meaning that the leg portion 3 resists the rotation, and rotation of the control tube 2 connected to the leg portion 3 is also prevented. If the main body 4 were freely rotatable around its axis relative to the connecting portion 8 (leg portion 3), the rotation could not be prevented, but in this example, the rotation is prevented by the pressing force of the tip of the screw 10 against the outer surface of the small-diameter portion 4c of the main body 4 inserted inside the connecting portion 8. In addition to or instead of preventing rotation by the pressing force of the screw 10, rotation may be prevented by engaging the curved plate portion 5 with a protruding portion (for example, two support shafts 12) on the outer surface of the connection portion 8, or by fitting serrations of the main body 4 to the connection portion 8.

[0035] To tighten the nut 63 of a screw-type fastener 65 as shown in Figure 5(A) using a rotary tool 65 equipped with the attachment 1 as described above, the socket 64 of the rotary tool 65 is fitted onto the nut 63, and the claw portion 7 is engaged with the washer 62 as shown in Figures 5(B) and (C). In this state, the operation button 65b of the rotary tool 65 is pressed, which rotates the socket 64 and tightens the nut 63. However, the engagement of the claw portion 7 prevents the washer 62 from rotating together with the nut 63.

[0036] 3(A), it is preferable to align the tip of socket 64 with the base of claw 7, which ensures that socket 64 is firmly fitted into nut 63 and claw 7 is firmly engaged with washer 62. This position adjustment can be easily performed by the length adjustment mechanism integrated into claw 7, and it is possible to accommodate changes in the length of socket 64 due to differences in installers, installation conditions, etc.

[0037] Furthermore, in the attachment 1 of this example, the distance between adjacent claw portions 7 is matched to the width of the washer 62, making it easy to engage the claw portions 7 with the washer 62 and adjust the orientation of the washer 62, and the orientation of the washer 62 can be adjusted using only the rotary tool 65 to which the attachment 1 is attached, which contributes to improved workability.

[0038] Furthermore, in the attachment 1 of this example, there are gaps between adjacent claw portions 7 (gaps formed around the claw portions 7), which increases the visibility of the installation points such as washers 62 and nuts 63, which also contributes to improved installation efficiency.

[0039] It should be noted that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, the following modifications can be mentioned.

[0040] In the above explanation, the rotary tool 65 (the object to which the attachment 1 is attached) is shown to be an impact driver, but this is not limited to this, and the rotary tool 65 may be, for example, an electric drill driver, an impact wrench, a nut runner, a torque wrench, or any other tool (whether it is a rotary impact tool or not) that can tighten nuts using a socket (or a part or component equivalent to a socket).

[0041] Furthermore, the above description of the rotary tool 65 equipped with the attachment 1 refers to its use in tightening the nut 63 of the improved screw-type fastener 60, but it can also be used to loosen (remove) the nut 63, and can also be used to tighten or remove a conventional screw-type fastener 55 in which the nut 58 is not integrated with the washer 57, or other nuts with washers.

[0042] In other words, if there is a part on the washer at the back of the nut to be tightened when viewed from the rotary tool 65 side that can mechanically catch on the washer, the rotation of the washer can be prevented by providing the attachment 1 with a claw portion 7 (which may be equivalent to a hook or protrusion) that has a shape that allows for this catch.

[0043] Furthermore, if the washer does not have a mechanical catch or has a shape that makes it difficult to catch, a part with a suction cup structure or adhesive structure may be provided on the front side of the operating tube 2 instead of or in addition to the claw portion 7, and this part may be pressed against the washer to prevent the washer from rotating.

[0044] Furthermore, the claw portion 7 may be plate-shaped or rod-shaped, and in the above embodiment, four claw portions 7 are provided, but one of them may be omitted so that only three are provided, or only two adjacent claw portions 7 may be provided.

[0045] Furthermore, at least the claw portion 7 may be made of an elastic material such as highly elastic rubber so as to be elastically deformable, thereby enabling flexible adaptation to different shapes of washers.

[0046] For example, if the holding portion 9 shown in Figure 2(A) is likened to a fork with a U-shaped metal fitting at the end of the handle, the two support shafts 12 and the reinforcing shaft 13 will constitute the handle, but the configuration of this handle can be changed in various ways, for example, the number of support shafts 12 can be one or three or more, and the reinforcing shafts 13 can be eliminated or two or more can be provided. Furthermore, this handle can be made flexible, which makes it easier to flexibly accommodate differences in the specifications and shapes of the rotary tool 65.

[0047] In the above embodiment, as shown in Figure 2(A), the length adjustment mechanism is constructed by stacking cylindrical main body 4 and connecting portion 8 of different diameters inside and outside in a sliding manner, but for example, the inside-outside relationship between main body 4 and connecting portion 8 may be reversed, in which case screw 10 and screw hole 11 may be provided on the main body 4 side.

[0048] In the above embodiment, in order to prevent the attachment 1 from falling out of the socket 64 when the socket 64 is attached to the sleeve 65a of the rotary tool 65, a configuration is adopted in which the inner diameter of the small diameter portion 4c of the main body 4 is smaller than the outer diameter of the front portion 64a (largest diameter portion) of the socket 64. However, other configurations may also be adopted. For example, the connection portion 8 shown in Figure 1(A) may be extended further rearward, and the extended portion may have a portion through which the shaft portion 64c of the socket 64 passes but not the central portion 64b (for example, a portion having an inner diameter larger than the outer diameter of the shaft portion 64c and smaller than the outer diameter of the central portion 64b).

[0049] In the above description, the locking portion 14 that locks onto the handle portion 65c is shown as an locking portion that locks onto a portion of the rotary tool 65 other than the socket 64, but this is not limited to this, and the locking portion 14 may be configured to lock onto another portion of the rotary tool 65 (for example, the upper portion, etc.), and further, instead of locking, it may be configured to be fixed, connected, etc. in a detachable manner.

[0050] In the above embodiment, a curved plate portion 5 is provided that forms a groove 6, and the lower part of the connection portion 8 is inserted into this groove 6 to prevent the connection portion 8 from wobbling, and the engagement (contact) between the curved plate portion 5 and the support shaft 12 is configured to prevent the connection portion 8 from rotating around its axis, but it is also possible not to provide the curved plate portion 5.

[0051] It goes without saying that the modifications given in this specification may be combined as appropriate. [Explanation of symbols]

[0052] 1 Attachment 2 Operation tube 3 leg part 4 Main unit 4a Large diameter part 4b Narrowed part 4c Small diameter section 5 Curved plate section 6 grooves 7 Claw 8 Connection 9 Holding part 10 screws 11 screw holes 12 Spindle 13 Reinforcing shaft 14 Contact plate part 51 Sheathing 52 Separator 53 Corn 54 Butterwood 54A Vertical Flap 54B Side flutter 55 Screw fastener 56 volts 57 Washer 58 Nut 60 Screw-type fastener 61 volts 61a Male thread 62 Washer 62a through hole 63 Nut 63a Cylindrical part 64 sockets 64a Front 64b central part 64c shaft 65 Rotary Tools 65a sleeve 65b Operation button 65c handle part

Claims

1. An attachment that is attached to a rotary tool that rotates a socket that fits onto a nut and tightens the nut onto a male thread portion of a bolt member, This attachment is configured so that when tightening a nut using a rotary tool, it comes into contact with a washer that is located further back than the nut when viewed from the rotary tool side and is movable along the male thread portion while being inserted into the male thread portion.

2. 2. An attachment according to claim 1, wherein the portion that comes into contact with the washer is formed by a claw portion.

3. The attachment according to claim 2, further comprising a length adjustment mechanism at a portion integrated with the claw portion.

4. 4. The attachment according to claim 1, further comprising a locking portion that is locked to a location on the rotary tool other than the socket.

Images