JPH078896Y2 - nut - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a nut that can be fixed to a threaded rod at an appropriate position and can be freely moved.

(Prior Art) The present applicant has proposed a nut described in Japanese Utility Model Publication No. 62-128218. This nut is designed to be quickly moved to a desired position without rotating the nut with respect to the threaded rod. This nut is formed by displacing the center of the slide hole and the center of the screw hole, leaving the threaded portion on the top and bottom, and penetrating the hole. It is raised and orthogonal to the threaded rod, and is fastened to the threaded rod using the threaded portion.

(Problems to be Solved by the Invention) According to the above nut, the nut can be easily and quickly moved with respect to the threaded rod and is currently being effectively used. There is such a request.

That is, firstly, the nut can be temporarily temporarily fixed in the middle of the threaded rod.

Secondly, it is necessary to provide a predetermined gap between the upper and lower screw portions left in the screw hole in order for the nut to slide the screw rod, and the nut tends to be large in size in order to secure this gap. Therefore, make it smaller from the viewpoint of manufacturing cost.

Thirdly, there is a gap between the screw rod and the slide hole when fixing the nut, and for example, cutting chips enter when the workpiece is stopped and the rotation of the nut is hindered when releasing the nut. Do not let anything in the hole block the rotation.

The purpose of this invention is to meet the above requirements.

(Means for Solving the Problem) In the nut according to the present invention, the nut can be moved without rotating with respect to the threaded rod and can be fixed at an appropriate position of the threaded rod.

Therefore, in this invention, the following configuration is adopted.

The nut includes a first nut portion that is one nut member and a second nut portion that is the other nut member. The first nut portion is provided with a connecting portion, and the second nut portion is provided with a connecting hole. The connecting portion of the first nut portion is rotatable in the connecting hole of the second nut portion and the shaft of the second nut portion. It is connected so that it can move in the axial direction. Mounting holes are formed through the first nut portion and the second nut portion, respectively. Each mounting hole is a hole in which a screw hole and a slide hole are combined, and the center of the screw hole and the center of the slide hole are displaced from each other to leave a threaded portion, and the centers of both screw holes coincide with each other. . The connecting portion and the connecting hole are screwed together, and the screw is the same as the screw portion of each screw hole.

A cover that covers the slide hole on the outer end surface of one or both of the first nut portion and the second nut portion to prevent chips and cement from entering the mounting hole when the nut is used. Is rotatably mounted around the screw hole.

A means for restricting the rotation of the first nut portion 2 or the second nut portion 3 is provided, and the restricting means includes, for example, a restricting pin and a stopper, and the restricting pin is provided on one of the first nut portion and the second nut portion. A stopper is provided on the other side, and this stopper is arranged on the rotation locus of the restriction pin.

(Operation) When the nut is rotated by rotating the first nut portion or the second nut portion, the positional relationship of the screw portions of both screw holes is changed, and the nut can be freely moved with respect to the threaded rod or at a predetermined position. It can be fixed.

(Embodiment) First, a first embodiment of the present invention will be described with reference to FIGS.

As shown in FIGS. 1 and 2, the nut 1 comprises a first nut portion 2, a second nut portion 3 and a cover 4.

The first nut portion 2 has a cross section T as shown in FIGS.
The small-diameter portion is a connecting portion 21 formed in a V shape, and a screw 22 is formed on the outer periphery of the connecting portion. Then, the attachment hole 5 is penetrated through the first nut portion 2 in the thickness direction. The mounting hole 5
The screw rod S is a combination of a screw hole 51 into which a screw can be coupled and a slide hole 52 for allowing the first nut portion 2 to freely move with respect to the screw rod. The screw part 6 is formed in a part of the screw hole so as to be displaced from the center of the screw hole. The center of the screw hole 51 coincides with the center of the first nut portion 2. The diameter of the screw hole 51 is set shorter than the diameter of the slide hole 52.

A knurl is formed on the outer circumference of the flange portion of the first nut portion 2.

The second nut portion 3 is formed in a U-shaped cross section as shown in FIGS. 1, 2, and 4, and a connecting hole 31 is cut from the inner end surface (upper end surface in FIG. 1) in the central portion. The screw 32 is formed on the inner circumference of the connecting hole. The connecting portion 21 of the first nut portion 2 is screwed into the connecting hole 31 via screws 32 and 22. Therefore, by turning one of the first nut portion 2 and the second nut portion 3, mutual connection and release can be performed.

The second nut 3 has a mounting hole 5 for the first nut portion 2.
A mounting hole 7 that is substantially the same as the above is penetrated in the thickness direction. Screw hole 71 of second nut 3, screw portion 8 and slide hole
Reference numerals 72 correspond to the screw hole 51, the screw portion 6 and the slide hole 52 of the first nut portion 2, respectively.

The center of the screw hole 71 of the mounting hole 7 and the center of the screw hole 51 of the mounting hole 5 of the first nut portion 2 coincide with each other.

The cover 4 is composed of an arc-shaped plate body as shown in FIGS. 1, 2, 5, and 6. The cover 4 is rotatably fitted into the shallow hole portion 9 formed around the screw hole 51 on the outer end surface (upper end surface in FIG. 1) of the first nut portion 2. In order to prevent the cover 4 from coming off from the outer end surface of the first nut portion 2, a groove 91 having a concave shape is formed on the outer periphery of the hole portion 9.
The outer peripheral portion of the cover is fitted in this groove. The cover 4 is provided with a knob 41 on its upper surface in order to facilitate the rotation operation of the cover around the screw hole 51.

First, the relationship between the mounting hole 5 of the first nut portion 2 and the mounting hole 7 of the second nut portion 3 will be described, and then the relationship between the first nut portion and the cover 4 will be described.

As shown in FIGS. 1 and 2, when the screw portion 6 of the screw hole 51 of the first nut portion 2 and the screw portion 8 of the screw hole 71 of the second nut portion 3 are located opposite to each other, The inside of the mounting holes 5 and 7 of both nut portions can be screwed to the screw rod S.

Further, as shown in FIGS. 7 and 8, when the screw portion 6 of the screw hole 51 and the screw portion 8 of the screw hole 71 are in a vertically continuous positional relationship, both nut portions 2 and 3 are attached. The holes 5 and 7 are larger than the diameter of the threaded rod S over the entire length, a gap is opened between the holes 5 and 7, and the nut 1 becomes movable with respect to the threaded rod.

In the state shown in FIGS. 1 and 2, there is a gap between the screw rod S and the mounting hole 5. Therefore, the gap can be covered by rotating the cover 4 180 degrees from the position shown in FIG.

Next, the usage method will be described.

A case where the nut 1 is freely moved to the threaded rod S without rotating will be described.

First, the first nut portion 2 is rotated so that the upper and lower mounting holes 5 and 7 are aligned with each other to open both mounting holes over the entire length as shown in FIGS. After rotating it to the right, pass the screw rod S through the mounting hole, move the nut 1 to the right, and slide the screw rod into the slide hole.
After putting it on the inner surface of 52, 72, move the nut up and down.

A case where the nut is stopped in the middle of the threaded rod will be described.

First, the nut 1 is moved to the left from the position shown in FIGS. 7 and 8 to bring the screw portions 6 and 8 into contact with the screw rod S. Then, when the first nut portion 2 is rotated, the connecting portion 21 becomes a connecting hole.
31 When it is screwed downward and turned about halfway, the inner end surface (lower surface) 2a of the collar portion abuts the inner end surface of the second nut portion 3 as shown in Figs. And screw part 6,
8 is at the opposite position, and the threaded portion and the threaded rod S mesh with each other. As a result, the nut 1 is fixed to the threaded rod. At this time, in order to cover the gap between the screw rod S and the mounting hole 5, the cover 4 is rotated 180 degrees from the position shown in FIG.

The step of providing the mounting holes 5 and 7 at the time of processing the nut may be performed independently for each of the first nut portion 2 and the second nut portion 3. However, for example, the following method may be used. First, the first nut portion 2 is rotated to press the brim portion strongly against the inner end surface of the second nut portion 3 to integrate the first nut portion and the second nut portion. After forming a screw hole in the central portion of the coupled first nut portion and second nut portion, the nut portions are separated, and slide holes are formed for each of the first nut portion and the second nut portion. By doing so, the screw holes can be cut at the same time, the threading is facilitated, and there is no error in the thread pitch between the threaded portions of both nut portions, and the nut 1 is smoothly coupled to the threaded rod S. .

A second embodiment of the present invention will be described with reference to FIGS. 9 and 10.

The nut in this example is the same as the nut in the above example, but is different in that it is not provided with a cover, and is different in that a regulating means for regulating the rotation of the first nut portion 2 is provided. There is.

Therefore, this regulation means will be described.

The first nut portion 2 has a restriction pin 9 threaded on the outer periphery screwed into a hole penetrating from the outer end surface to the inner end surface, and the lower end portion projects below the inner end surface of the first nut portion. Further, in order to enable the rotation of the first nut portion 2 within a range of, for example, 180 degrees, a pin-shaped stopper 10 is provided at the bottom of the connection hole 31 of the second nut portion 3.
And the stopper position is set on the rotation locus of the restriction pin 9. Therefore, when the restriction pin 9 is protruding from the inner end surface of the first nut portion 2, even if the first nut 2 is rotated, the restriction pin 10 does not move as shown by the chain line in FIG.
Since it abuts against, the rotation angle is regulated within a range of 180 degrees, and if the regulation pin 9 is retracted into the first nut portion 2, the first nut portion can rotate 360 degrees.

According to this example, it is possible to prevent the first nut portion 2 from being detached from the second nut portion 3 and to switch between fixing and sliding movement of the nut simply by rotating the first nut portion 2 in half. Operation becomes reliable and easy.

Another example of the regulating means utilizes bayonet coupling. As shown in FIG. 11, a pair of regulating pins 11 are attached to the second nut portion 3 so as to be movable back and forth in the horizontal direction, and the tip ends of the pins are attached. A groove 23 having a predetermined length is provided on the outer circumference of the connecting portion 21 of the first nut portion 2 facing the tip end portion of each pin so as to project into the connecting hole. When the first nut portion 2 is turned in the loosening direction, the first nut portion moves upward, but the tip end portion of the restriction pin 11 moves into the groove.
Since the first nut portion is prevented from moving upward by coming into contact with the end portion of 23, the rotation of the first nut portion is restricted.

The restriction pins do not need to be paired, but if they are paired, the first nut portion 2 can smoothly rotate.

(Effect of the Invention) According to this invention, the first nut portion having the mounting hole and the second nut portion
Since the nut portion is provided, the nut can be freely moved with respect to the threaded rod and can be fixed even in the middle of the threaded rod, so that the nut can be downsized. By providing the cover, it is possible to prevent chips and the like from entering the mounting hole. By providing the rotation restricting means, the first nut part and the second nut part can be integrated, and if the restricting pin and the stopper are used as the rotation restricting means, the nut part can rotate at a predetermined rotation angle. It can be fixed and released easily and surely.

[Brief description of drawings]

1 is an enlarged vertical sectional view showing a state in which a nut is fixed to a threaded rod, FIG. 2 is a plan view of FIG. 1, FIG. 3 is a transverse sectional view of a first nut portion, 4 is a cross-sectional view of the second nut portion, FIG. 5 is a plan view of the cover, FIG. 6 is a side view of the cover, and FIG. 7 is an enlarged view showing a state in which the nut is movable with respect to the screw rod. A plan view, FIG. 8 is a partially cutaway plan view of FIG. 7, FIG. 9 is a longitudinal sectional view showing a second embodiment, FIG. 10 is a partially cutaway plan view of FIG. 9, and FIG. It is sectional drawing which shows the other example of a regulation means. 1 ... Nut, 2 ... First nut portion 21 ... Connection portion, 22 ... Screw 23 ... Groove, 3 ... Second nut portion 32 ... Screw, 4 ... Cover 5,7 ... Mounting hole, 51, 71 ... Screw hole 52, 72… Slide hole, 6,8… Screw part 9,11… Regulation pin, 10… Stopper S… Screw rod

Claims (4)

[Scope of utility model registration request] 1. A first nut portion and a second nut portion are provided, the first nut portion is provided with a connecting portion, and the second nut portion is provided with a connecting hole. The connecting portion is rotatably connected to the connecting hole of the second nut portion and is movable in the axial direction of the second nut portion, and the mounting holes pass through the first nut portion and the second nut portion, respectively. Each of the mounting holes is formed by shifting the center of the screw hole and the center of the slide hole and leaving the threaded portion, the centers of both the screw holes are the same, and is connected to the connecting portion. A nut characterized in that the hole is screwed and the screw is the same as the threaded portion. 2. The nut according to claim 1, wherein a cover for covering the slide hole is provided rotatably around the screw hole on the outer end surface of the first nut portion or the second nut portion. 3. The nut according to claim 1, further comprising a restriction means for restricting rotation of the connecting portion. 4. The regulation means comprises a regulation pin provided on one of the first nut portion and the second nut portion and a stopper provided on the other, and the stopper is positioned on the rotation locus of the regulation pin. The nut according to claim 2, wherein