JP2018146105A - Looseness prevention of screw - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that for looseness prevention of a screw, although many inventions have been created, and simpleness in use, inexpensiveness and mass productivity have been always pursued, further improvement is required.SOLUTION: Looseness prevention of a screw depends on a structure configured such that before a male screw and a female screw are screwed, when screwed or after screwed, a coil-like helical spring having the same winding direction as a screw fastening direction is wound around an outer periphery of the male screw or female screw from a tip part of the helical spring in a direction reverse to the screw fastening direction; and then a rear end part of the helical spring is fixed to a member, or the rear end part of the helical spring is fixed to the member in advance.SELECTED DRAWING: Figure 5

Description

Detailed Description of the Invention

  The present invention relates to a method for preventing loosening, in which it is indispensable to rely on screws to fasten parts of architectural and mechanical workpieces, and new reliability is always required.

  Although the conventional method has mainly stopped the loosening by pressurizing the slope of the thread according to some method and press-contacting the male screw and the female screw, the present invention is expected to have an effect of a tightening clutch using a helical spring. Is a new idea

JP-A-2006-9902 Locking nut JP2008-138794 Fastener

  Although many inventions in the past have been made to prevent loosening of screws, they have always been pursued for ease of use, low cost, and mass productivity.

  Before or after the male screw and female screw are screwed together, a coiled helical spring with the same winding direction as the screw tightening direction is placed on the outer periphery of the male screw or female screw in the screw tightening direction. Wrong from the tip of the helical spring, and then the rear end of the helical spring is fixed to the member, or the screw is loosened depending on the structure in which the rear end of the helical spring is fixed to the member in advance. Stop

  Because it can be applied to all places where screws are used, it has a great effect on use and is highly reliable with an unprecedented method.

Figure 1

  Half cross section of winding spring clutch, explanatory drawing

Second figure

  Half cross-section of helical spring, explanatory drawing when screwing male screw and female screw

Figure 3

  Half cross-section of helical spring wound around male screw with female screw fixed, explanatory diagram

Fig. 4

  Half cross section of helical spring with male screw and female screw in bolt and nut state, explanatory drawing

Fig. 5

  Half cross-section and explanatory drawing of a helical spring provided in the cavity of the female screw

Fig. 6

A is an arrow 2-2 'view, cross-section, and explanatory view of FIG. 5. B is an arrow ho-ho' view, cross-section, and explanatory view of FIG.

The basic idea of the present invention is that, as shown in Fig. 1, each of the springs and female screws is used as a "winding spring clutch" and "winding clutch". The embodiment is a typical one, and uses a combination that can be applied to the application, and a little explanation about the "winding spring clutch" that prevents the screw from loosening. (1) -1 and bearing shaft (1) -2 are installed, and the drive wheel (2) is freely mounted on the bearing shaft (1) -2, and is prevented from falling off by the retaining ring (3). Is provided with a cylindrical portion {circle over (2)}-1 in a stepped state, and a coiled spring is wound around the joint between the cylindrical portion {circle around (1)}-1 and the cylindrical portion {circle around (2)}-1}. In order to make it easier to understand, it is expressed as a helical spring (4). Since a right-hand screw is generally used, a stepped shaft ▲ 1 is provided in a state where a bent portion ▲ 4 ▼ -1 is provided at the tip of a helical spring ▲ 4 that is right-handed according to the spirit of the present invention. When a suitable load is applied to ▼ and the driving wheel ▲ 2 ▼ is rotated clockwise as viewed from the arrow i side, the helical spring ▲ 4 ▼ is pushed in the winding direction. Although it is not transmitted, when the driving wheel (2) is rotated counterclockwise, the helical spring (4) is stretched, and the winding force is wound around the cylindrical portion (2) -1 to transmit the power. When the driving wheel (2) is rotating, the helical spring is rotated. When the bent portion (4) -1 at the tip of the spring (4) is pressed, the helical spring (4) is pushed in the winding direction, so that no power is transmitted. Necessary for releasing the screwed screw

Embodiment 1 of the Invention

In Fig. 2A, when screwing the female screw (8) and the male screw (9) provided on the drive shaft (5) and the driven shaft (6) respectively, the drive shaft (5) and Wrap the helical spring (4) beyond the joint of the driven shaft (6). The screw and spring are both in the same direction, so they can be easily screwed together, but it is not possible to reversely rotate to release the screw. Cannot be turned because the helical spring (4) is wound. The driven shaft (6) side of the helical spring (4) is normally pulled in and locked, and can be said to be fixed. As can be seen here, even if the drive shaft (5) and the driven shaft (6) are replaced, the female screw (8) and the male screw (9) can be replaced. Not only the components but also their components are described, and the helical spring (4) is fixed to the rear end (4) -2. The fixed point is collectively referred to as member (7). In FIG. 2B, the rear end portion (4) -2 of the helical spring (4) is inserted and fixed in the mounting hole (7) -1. Therefore, the function is the same as A. Therefore, in the figure, it is displayed as male screw (9) (7) (hereinafter the same indication). Like A, both the screw and spring are in the same direction. Although it is possible to reverse the rotation to release the screw, it cannot be turned because the helical spring (4) is wound.

In the following embodiments including A and B, in order to release the screwing of the female screw (8) and the male screw (9), the tip (4) -3 of the helical spring (4) is It can be made by pushing in the winding direction of the spring and loosening and releasing the helical spring (4) or by opening the rear end (4) -2 from the mounting hole (7) -1. The fixing method and shape for fixing the rear end portion (4) -2 of the winding spring (4) to the hole (7) -1 of the member (7) are not specified. Similarly, the shape of the tip of the spring, The wire diameter, winding diameter, number of turns, pitch, etc. are in the category of general design, and detailed description is omitted here.

Embodiment 2 of the Invention

Fig. 3A shows the attachment of male screw (9) to the fixed female screw (8) of Fig. 2 (welding nut, burring, etc.). Here, the helical spring (4) is attached. The female screw (8) is illustrated as being wound around the male screw (9). Since the female screw (8) is a member (7) for attaching the rear end portion (4) -2 of the helical spring (4), the female screw (8) is used here. (▲ 7 ▼) is displayed (hereinafter the same is indicated). In FIG. 7B, a hollow portion (11) is provided in the female screw (8), and the hollow portion (11) is adjacent to the female screw. Attach the rear end (4) -2 of the winding spring (4) and place the tip (4) -3 of the winding spring (4) on the entrance side of the cavity (11). Screw the male screw (9) from the tip (4) -3 side, and wind the coil spring (4) around the cylindrical part (9) -2 of the male screw (9) Only with clogging use, the rear portion ▲ 4 ▼ -2 of helical spring ▲ 4 ▼, so that the pre-fixing

Embodiment 3 of the Invention

In Fig. 4A, the bolt and nut shape most frequently used for fastening articles is described. For winding the helical spring (4) around the head of the male screw (9) (hexagonal bolt shape in the figure). , Wrap around the head cylinder (9) -1 which is a cylindrical outer peripheral groove from the tip part (4) -3 of the helical spring (4), and attach the rear end part (4) -2 to the member (7) A cylindrical outer groove (8) -1 is provided around the outer periphery of the female screw (8) (hexagonal nut shape in the figure) to wind the helical spring (4). Attach the spring (4) and attach the rear end (4) -2 to the member (7). If the head of the male screw (9) and the outer periphery of the female screw (8) are polygonal, wind the helical spring (4). Since it is only necessary to have a sticking action, a part of the outer peripheral groove can include a flat surface, and it is not necessarily a groove shape. May even without

Embodiment 4 of the Invention

FIG. 4B shows a method in which the female screw (8) has a through hole. In this method, the helical spring (4) can be attached later. The article (13) is fastened to the female screw (8). For this purpose, a hollow portion (11) is provided in the female screw (8), and the tip portion (4) -3 of the helical spring (4) is arranged in the vicinity of the hollow portion (11) and the female screw, so that a cylinder of the male screw (9) is provided. It is arranged so that it wraps around the tip part (4) -3 of the helical spring (4) around the part (11) (which may be the screw part of the male screw), and the rear end part (4) -2 is attached to the member (7). Attach screw in this case can be assisted by cylindrical tool ▲ 14 ▼ etc. Large notch ▲ 14 ▼ -2 is the spring spring ▲ 4 ▼ Retracted the rear end ▲ 4 ▼ -2, small notch ▲ 14 ▼ -1 and push the tip ▲ 4-3 of the spiral spring ▲ 4 ▼ in the winding direction while assisting. 9 ▼ the to Nukitoreru, it can also assist when screwing the male screw ▲ 9 ▼ turn in the opposite

Embodiment 5 of the Invention

FIGS. 5 and 6 show the case where the nut is configured as a single unit. In FIG. 5, the cylindrical portion {circle over (8)}-1 (not required to be provided for convenience of explanation) on the outer periphery of the female screw {circle around (8)}. ), Drill a notch hole ▲ 12 ▼, pass through this hole, pass through the rear end ▲ 4 ▼ -2 of the helical spring ▲ 4 ▼, hole ▲ 8 ▼ (▲ 7 ▼) of the mounting female screw ▲ 7 ▼ -1 The helical spring (4) is the hollow portion (11) provided in the female screw (8), and the tip (4) -3 is the end of the female screw (8) (8) -2. When the male screw (9) is screwed in from the direction of the arrow C, the tip portion (4) -3 of the helical spring (4) is guided to the trough of the male screw (9). After the helical spring (4) is wound on the male screw (9), the screwing of the female screw (8) and the male screw (9) is finished, and the loose spring is stopped by the helical spring (4). In the same way as before, when loosening the screw, if the rear end portion (4) -2 of the helical spring (4) is removed from the fixing, the female screw (8) will be loosened by the angle α. Since the female screw (8) cannot be completely removed in the case of, when the female spring (8) is loosened by unscrewing the rear end (4) -2 of the helical spring (4), the female screw within the angle β Depending on the end of (8), (8) -2, etc., the screw can be released by pushing back the tip (4) -3, the angle α is larger than the angle β, and the tip (4) of the helical spring (4) ▼ -3 is configured to be guided into the valley groove of the male screw ▲ 9 ▼, the end ▲ 8 ▼ -2 of the female screw ▲ 8, etc., and the tip ▲ 4 ▼ of the helical spring ▲ 4 ▼ -3 is a general design category

(1) Stepped shaft (2) Drive wheel (3) Retaining ring (4) Helical spring (5) Drive shaft (6) Driven shaft (7) Member (8) Female screw (9) Male screw (10) Washer (11) ▼ Cavity ▲ 12 ▼ Notch

Detailed Description of the Invention

  The present invention relates to a method for preventing loosening, in which it is indispensable to rely on screws to fasten parts of architectural and mechanical workpieces, and new reliability is always required.

  Although the conventional method has mainly stopped the loosening by pressurizing the slope of the thread according to some method and press-contacting the male screw and the female screw, the present invention is expected to have an effect of a tightening clutch using a helical spring. Is a new idea

JP-A-2006-9902 Locking nut JP2008-138794 Fastener

  Although many inventions in the past have been made to prevent loosening of screws, they have always been pursued for ease of use, low cost, and mass productivity.

  Before or after the male screw and female screw are screwed together, a coiled helical spring with the same winding direction as the screw tightening direction is placed on the outer periphery of the male screw or female screw in the screw tightening direction. Wrong from the tip of the helical spring, and then the rear end of the helical spring is fixed to the member, or the screw is loosened depending on the structure in which the rear end of the helical spring is fixed to the member in advance. Stop

  Because it can be applied to all places where screws are used, it has a great effect on use and is highly reliable with an unprecedented method.

  Half cross section of winding spring clutch, explanatory drawing   Half cross-section of helical spring, explanatory drawing when screwing male screw and female screw   Half cross-section of helical spring wound around male screw with female screw fixed, explanatory diagram   Half cross section of helical spring with male screw and female screw in bolt and nut state, explanatory drawing   Half cross-section and explanatory drawing of a helical spring provided in the cavity of the female screw   A is an arrow 2-2 'view, cross section, and explanatory drawing of FIG. 5. B is an arrow

The basic idea of the present invention is that, as shown in FIG. 1, each of the springs and female screws is used as a “winding spring clutch” and “winding clutch”. The embodiment is a typical one, and uses a combination that can be applied to the application, and a little explanation about the "winding spring clutch" that prevents the screw from loosening. (1) -1 and bearing shaft (1) -2 are provided, and the drive wheel (2) is freely mounted on the bearing shaft (1) -2, and the falling off by the retaining ring (3) is prevented. Is provided with a cylindrical portion {circle over (2)}-1 in a stepped state, and a coiled spring is wound over the joint portion between the cylindrical portion {circle over (1)}-1 and the cylindrical portion {circle around (2)}-1}. In order to make it easier to understand, it is expressed as a helical spring (4). Since a right-hand screw is generally used, a stepped shaft ▲ 1 is provided in a state where a bent portion ▲ 4 ▼ -1 is provided at the tip of a helical spring ▲ 4 that is right-handed according to the spirit of the present invention. When a suitable load is applied to ▼ and the driving wheel ▲ 2 ▼ is rotated clockwise as viewed from the arrow i side, the helical spring ▲ 4 ▼ is pushed in the winding direction. Although it is not transmitted, when the driving wheel (2) is rotated counterclockwise, the helical spring (4) is stretched, and the winding force is wound around the cylindrical portion (2) -1 to transmit the power. When the driving wheel (2) is rotating, the helical spring is rotated. When the bent portion (4) -1 at the tip of the spring (4) is pressed, the helical spring (4) is pushed in the winding direction, so that no power is transmitted. Necessary for releasing the screwed screw

Embodiment 1 of the Invention

In FIG. 2A, when the female screw 8 and the male screw 9 provided on the drive shaft 5 and the driven shaft 6 are screwed together, the drive shaft 5 as in FIG. Wrap the helical spring (4) beyond the joint of the driven shaft (6). The screw and spring are both in the same direction, so they can be easily screwed together, but it is not possible to reversely rotate to release the screw. Cannot be turned because the helical spring (4) is wound. The driven shaft (6) side of the helical spring (4) is normally pulled in and locked, and can be said to be fixed. As can be seen here, even if the drive shaft (5) and the driven shaft (6) are replaced, the female screw (8) and the male screw (9) can be replaced. Not only the components but also their components are described, and the helical spring (4) is fixed to the rear end (4) -2. In FIG. 2 and B, the fixed point is collectively referred to as member (7). In FIG. 2 (B), the rear end portion (4) -2 of the helical spring (4) is inserted into the mounting hole (7) -1 and fixed. Therefore, the function is the same as A. Therefore, in the figure, it is displayed as male screw (9) (7) (hereinafter the same indication). Like A, both the screw and spring are in the same direction. Although it is possible to reverse the rotation to release the screw, it cannot be turned because the helical spring (4) is wound.

In the following embodiments including A and B, in order to release the screwing of the female screw (8) and the male screw (9), the tip (4) -3 of the helical spring (4) is It can be made by pushing in the winding direction of the spring and loosening and releasing the helical spring (4) or by opening the rear end (4) -2 from the mounting hole (7) -1. The fixing method and shape for fixing the rear end portion (4) -2 of the winding spring (4) to the hole (7) -1 of the member (7) are not specified. Similarly, the shape of the tip of the spring, The wire diameter, winding diameter, number of turns, pitch, etc. are in the category of general design, and detailed description is omitted here.

Embodiment 2 of the Invention

Fig. 3A shows the installation of male screw (9) to the fixed female screw (8) of Fig. 2 (welding nut, burring, etc.). Here, helical spring (4) is attached. The female screw (8) is illustrated as being wound around the male screw (9). Since the female screw (8) is a member (7) for attaching the rear end portion (4) -2 of the helical spring (4), the female screw (8) is used here. (▲ 7 ▼) is displayed (hereinafter the same is indicated). In FIG. 7B, a hollow portion (11) is provided in the female screw (8), and the hollow portion (11) is adjacent to the female screw. A rear end portion (4) -2 of the winding spring (4) is attached, and a tip portion (4) -3 of the helical spring (4) is arranged on the entrance side of the hollow portion (11), and the helical spring (4) Screw the male screw (9) from the tip (4) -3 side of the screw and wind the coil spring (4) around the cylindrical part (9) -2 of the male screw (9) Only with clogging use, the rear portion ▲ 4 ▼ -2 of helical spring ▲ 4 ▼, so that the pre-fixing

Embodiment 3 of the Invention

In FIG. 4A, the bolt / nut shape that is most often used for fastening articles is described. For winding a helical spring (4) around the head of a male screw (9) (hexagonal bolt shape in the figure). , Wrap around the head cylinder (9) ・ 1 which is a cylindrical outer circumferential groove from the tip part (4) -3 of the helical spring (4), and attach the rear end part (4) -2 to the member (7) A cylindrical outer groove (8) -1 is provided around the outer periphery of the female screw (8) (hexagonal nut shape in the figure) to wind the helical spring (4). Attach the spring (4) and attach the rear end (4) -2 to the member (7). If the head of the male screw (9) and the outer periphery of the female screw (8) are polygonal, wind the helical spring (4). Since it is only necessary to have a sticking action, a part of the outer peripheral groove can include a flat surface, and it is not necessarily a groove shape. May even without

Embodiment 4 of the Invention

FIG. 4B shows a method in which the female screw (8) is a through hole. In this method, the helical spring (4) can be attached later. The article (13) is fastened to the female screw (8). For this purpose, a hollow portion (11) is provided in the female screw (8), and the tip portion (4) -3 of the helical spring (4) is arranged in the vicinity of the hollow portion (11) and the female screw, so that a cylinder of the male screw (9) is provided. It is arranged so that it wraps around the tip part (4) -3 of the helical spring (4) around the part (11) (which may be the screw part of the male screw), and the rear end part (4) -2 is attached to the member (7). Attach screw in this case can be assisted by cylindrical tool ▲ 14 ▼ etc. Large notch ▲ 14 ▼ -2 is the spring spring ▲ 4 ▼ Retracted the rear end ▲ 4 ▼ -2, small notch ▲ 14 ▼ -1 and push the tip ▲ 4-3 of the spiral spring ▲ 4 ▼ in the winding direction while assisting. 9 ▼ the to Nukitoreru, it can also assist when screwing the male screw ▲ 9 ▼ turn in the opposite

Embodiment 5 of the Invention

FIG. 5 and FIG. 6 show the case where the nut is configured as a single unit. In FIG. 5, the cylindrical portion {circle over (8)}-1 (not necessary to provide in particular) on the outer periphery of the female screw {circle over (8)} ), Drill a notch hole ▲ 12 ▼, pass through this hole, pass through the rear end ▲ 4 ▼ -2 of the helical spring ▲ 4 ▼, hole ▲ 8 ▼ (▲ 7 ▼) of the mounting female screw ▲ 7 ▼ -1 The helical spring (4) is the hollow portion (11) provided in the female screw (8), and the tip (4) -3 is the end of the female screw (8) (8) -2. When the male screw (9) is screwed in from the direction of the arrow C, the tip portion (4) -3 of the helical spring (4) is guided to the trough of the male screw (9). After the helical spring (4) is wound on the male screw (9), the screwing of the female screw (8) and the male screw (9) is finished, and the loose spring is stopped by the helical spring (4). In the same way as before, when loosening the screw, if the rear end portion (4) -2 of the helical spring (4) is removed from the fixing, the female screw (8) will be loosened by the angle α. Since the female screw (8) cannot be completely removed in the case of, when the female spring (8) is loosened by unscrewing the rear end (4) -2 of the helical spring (4), the female screw within the angle β Depending on the end of (8), (8) -2, etc., the screw can be released by pushing back the tip (4) -3, the angle α is larger than the angle β, and the tip (4) of the helical spring (4) ▼ -3 is configured to be guided into the valley groove of the male screw ▲ 9 ▼, the end ▲ 8 ▼ -2 of the female screw ▲ 8, etc., and the tip ▲ 4 ▼ of the helical spring ▲ 4 ▼ -3 is a general design category

(1) Stepped shaft (2) Drive wheel (3) Retaining ring (4) Helical spring (5) Drive shaft (6) Driven shaft (7) Member (8) Female screw (9) Male screw (10) Washer (11) ▼ Cavity ▲ 12 ▼ Notch

Claims (1)

  Before or after the male screw and female screw are screwed together, a coiled helical spring with the same winding direction as the screw tightening direction is placed on the outer periphery of the male screw or female screw in the screw tightening direction. Wrapping the coil spring from the tip of the helical spring and then fixing the trailing end of the helical spring to the member, or fixing the trailing end of the helical spring to the member in advance

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