JP2576880B2 - Natto cage assembly - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for installing a nut from one side of a wall, through an opening in the wall, on the other side, and then screwing the nut to the nut. For fixing the element by screwing,
Related to a nut-cage assembly.

2. Description of the Prior Art Nut-cage assemblies for insertion into rectangular or square openings are already known. The cage or cage is
It has a bottom that is slightly smaller than the opening, a head that is larger than the opening, and four arms that extend from the center of each side of the bottom and connect the bottom to the head.

The nut is stored in the cage or cage.
The nut has grooves which cooperate with the arms to prevent rotation of the nut relative to the retainer between the retainer head and bottom and guide translation. No part of the nut protrudes from the retainer.

To use the nut-retainer assembly, first align the bottom of the retainer with the opening and insert the retainer into the opening until the head is received in the wall. The entire assembly is then turned, for example, a quarter turn, so that the ears or corners of the nut are brought into contact with the wall. Then insert the screw into the nut,
Tightening is then performed with care to prevent further rotation of the assembly in order to maintain the ears or corners of the nut against the wall, thereby locking the nut against the wall. In general, the mounting of a fixed element is performed by two operations. That is, the setting of the nut-cage assembly and the setting of the element. Between these two operations, the nut is in a standby state for receiving the screw.

In many cases, it is difficult to manually rotate the retainer relative to the opening, so that after insertion of the nut-retainer assembly into the opening by hand, a tool must be used to effect its rotation. .

SUMMARY OF THE INVENTION It is an object of the present invention to provide a nut-cage assembly that can be set to a desired position without performing any manual operation other than inserting the nut-cage assembly into an opening. That is.

(Means for Solving the Problems) A nut-cage assembly according to the present invention is composed of a nut and a retainer for accommodating the nut, and has a guide means for guiding one of the nuts to the other. The assembly is such that the guide means simultaneously guides translation along the screw axis and rotation about the axis, and the nut has at least one area projecting from an opening in the wall, When the nut is in position with respect to the retainer, the assembly can pass through the opening in the wall, and the stop prevents the nut from rotating with respect to the retainer at the stop position where the area of the nut projects from the opening. The means is also provided with the nut and the retainer.

Once the assembly of the invention has been inserted into the opening in the wall, no manual work or tools are required for its setting, and the screw can be screwed into the nut at any time. As the screw is screwed and turned, the nut is turned in the direction to the stop position, i.e. the position where at least a portion of the nut strikes the wall. At the end of the tightening of the screw, the nut part hits the wall, where the nut is held against the wall.

According to one preferred feature of the invention, the retainer moves the nut from a predetermined position to a stop position as the retainer is displaced along the axis of the screw in the direction in which the screw tightens into the nut. So that at least one
It has two cams.

This cam prevents the nut from jumping out of the opening after the nut has become non-rotating at the time of screwing. The cam causes the stop position to be reached when the nut reaches the wall.

According to another preferred feature of the invention, the nut has a recess that fits into the tip of the tool.

The recess allows the nut to be returned to position with a tool if necessary and the nut-retainer assembly pulled out.

According to yet another preferred feature of the invention, the nut and the bottom of the retainer comprise complementary shafts and holes for maintaining the nut in place on the bottom.

This feature prevents rotation of the nut-cage assembly because the nut does not move within the cage unless screwing is initiated, and a conventional nut-cage when the nut is in the opening. The disadvantages of the assembly are eliminated.

The above and other features and advantages of the present invention will become apparent from the following description of embodiments of the present invention, which proceeds with reference to the accompanying drawings.

(Embodiment) As shown in the drawing, the nut-cage assembly of the present invention includes a nut 9 and a cage 1 for accommodating the nut 9. According to the present invention, the retainer 1 and the nut 9 are provided with guide means for simultaneously guiding translation along the screw axis 18 with respect to one of the other and rotation about the axis, and the nut 9 as the retainer. When in a predetermined position relative to 1 (FIGS. 1, 4 and 6), the assembly is insertable into the opening 14 in the wall 15, but the nut is at least one that can protrude from said opening.
And a locking means for locking the rotation of the nut 9 with respect to the retainer 1 at a stop position (FIGS. 5 and 7) of the nut protruding from the opening.

In the embodiment shown, the nut comprises a cylindrical central body 19 and two ears 10 extending from opposite locations on its diameter line, and the retainer 1 comprises a bottom 5 and a diagonal thereof. And two arms 4 extending at right angles from the upper reciprocal corner. Each of these arms has a curved portion 20 of an arc centered on the screw axis 18, and the curved portion 20 and the center body 19 form the guide means for rotation and translation with respect to the axis,
The ear 10 and the arm 4 form the locking means for the rotation of the nut. The respective tips of each ear 10 form said area projecting with respect to the opening 14.

In the embodiment shown, the retainer 1 is made by molding a plastic material and the nut 9 is made by casting and machining metal. Incorporation of the nut 9 into the retainer 1 inserts one ear 10 of the nut 9 between the two arms 4 and then pushes the center body 19 between the two bends 20 to fit. Due to the flexibility of the retainer, the incorporation of the nut can be easily carried out.

FIG. 1 shows the nut-cage assembly of the present invention positioned above a rectangular opening 14 in a wall 15 on which the element 16 shown in FIGS. 6 and 7 is mounted. . Installation involves inserting the nut-cage assembly of the present invention into the opening 14 in the wall until the head 2 of the cage 1 hits the wall 15. When this simple insertion has taken place, the nut is already in place. The assembly is maintained by making the fit between the retainer 1 and the opening 14 slightly tighter with simple adjustments. For example, in one variant embodiment, not shown, a tight fit is obtained by providing a clip on the arm 4 at the point indicated by 8 in FIG. As another variation not shown,
The head 2 may not be flat, but may comprise any element that fits with the element 16 to be fixed.

To mount the element 16, a screw 17 is inserted through the hole 21 of the element and the hole 3 of the head 2, and the tip of the screw is attached to the nut 9
, And then turn the screw in the tightening direction indicated by arrow 22 in FIG. The screw 17 is screwed into the nut 9 by this rotation. As a result, the nut is displaced toward the head 2 along the screw axis 18 while rotating. The nut moves from a predetermined angular position to a stop position by the rotation.
At the time of insertion, the ear part 10 which was directed in the direction AB (FIG. 1) substantially corresponding to the line connecting the center points of the short sides of the opening 14,
By the above transition, the opening 14 is directed in the direction CD substantially corresponding to the line connecting the central points of the long sides. At the end of the screwing (FIG. 7), the end of the ear 10 hits the wall 15 from below, and the wall, the head 2 and the element 16 are connected between the nut 9 and the head of the screw 17. Tighten with.

It should be noted that the nut-cage assembly of the present invention is fully applicable to any shape opening, especially square or rectangular openings, and even circular openings. In this last case, the conventional nut-where it was not applicable-
It is a significant advantage of the present invention over cage (cage) assemblies. The screw axis 18 is here conveniently adapted to coincide with the transversely symmetric axis of the aperture, but it is equally possible for the two axes to be offset from one another. Nut of the present invention
When the cage assembly is applied to a circular opening, the above-described misalignment is required. However, one area of the nut must project against the opening.

Locking the rotation of the nut 9 in the angular position where the end of the ear 10 protrudes with respect to the opening 14 makes it possible to use only one ear
10 is enough. It will be appreciated, however, that it is preferable to use two ears, particularly two ears located at opposite positions on the diameter line, to equalize the force of the nut against the wall.

The embodiment shown here of the guide means and the locking means provided in the cage 1 and the nut 9 is distinguished in that the main materials for making it, the working steps and the labor of the work can be reduced in particular. However, it goes without saying that means other than those shown are also possible.

According to one preferred feature of the invention, the retainer 1 has a screw shaft 18 in the direction in which the screw is tightened into the nut.
At least one cam for rotating the nut so as to shift the nut from the predetermined position to the stop position when displacing along the axis. That is, in the embodiment,
The two arms 4 are each a helical cam 6 concentric with the screw axis 18.
Is provided. A surface 23 on the screw shaft side of the cam extends the curved portion 20 and also has a chamfered portion 13 ( 8A and 8B) are provided.

According to another preferred feature of the invention, the nut has a recess 12 (FIG. 8B) around the screw hole, which fits into the tip of the tool. In the case shown, the recess fits a cross screwdriver.

According to yet another preferred feature of the invention, the nut 9 and the bottom 5 are provided with a complementary shaft 11 and a hole 7 for holding the nut 9 in place on the bottom. The shaft 11 has a cylindrical shape concentric with the nut and is provided on a surface opposite to the concave portion 12.

The shaft and bore are polygonal, for example, as shown, not only to keep the nut 9 on the shaft center 18 but also to suppress rotation of the nut so that screwing of the screw into the nut can begin unhindered. Is made hexagonal.

(Operation) Next, the operation of the illustrated nut-cage assembly will be described in detail.
By keeping the nut in place with a slight tight fit between the bore 7 and the shaft 11, the nut-cage assembly can be safely inserted into the opening 14 in the wall, and then the element 16 can be placed on the wall. If the screw 17 is set and inserted, the nut 9 is locked so as not to rotate, so that the screw 17 can be easily screwed. As the screwing proceeds, the shaft 11 is gradually pulled out of the hole 7, where one face of each ear 10 moves along the face 25 of the arm 4. The helical surface 24 of the cam 6 extends from this surface 25. After the shaft 11 is disengaged from the hole 7, the chamfer 13 slides along its spiral surface 24. At the end of this nut movement, each ear 10 engages between the surface 26 of the cam 6 and the surface 27 of the arm 4, thereby locking the nut in both directions. This rotational locking facilitates reverse turning of the screw 17 when removing the element 16.

Also, if the nut-retainer assembly is to be withdrawn from the wall 15 after the screws 17 and the element 16 have been removed, the nut must be in place so that the withdrawal is not blocked by any part of the nut 9. In order to return to the above, the nut 9 may be rotated while pushing back the nut 9 toward the bottom 5 using a screwdriver, and the shaft 11 may be inserted into the hole 7.

It goes without saying that the invention is not limited to the embodiments shown and described, but encompasses all variants conceivable by a person skilled in the art.

[Brief description of the drawings]

FIG. 1 is a perspective view, somewhat omitted, showing the nut-cage assembly of the present invention and the opening in the wall to which it is attached;
The figure is a front view of the retainer of the assembly, and FIG. 3 is BB of FIG.
FIG. 4 is a cross-sectional view taken along line AA of FIG. 3, showing a position where the nut is at a predetermined position, FIG. 5 is a diagram equivalent to FIG. 4 where the nut is at a stop position, FIG. 6 is a sectional view showing the nut-retainer assembly of the present invention mounted on a wall, together with a fixed element and a screw, showing a state at the start of screwing, and FIG. FIG. 8A is a side view of the nut, FIG. 8B is a plan view of the nut, and FIG. 9 is a partial bottom view of the retainer. In the figure, 1 is a retainer, 4 is an arm, 6 is a cam, 7 is a hole, 9 is a nut, 10 is an ear, 11 is a shaft, 13 is a chamfer, 14 is an opening, 15
Indicates a wall, 16 indicates an element to be fixed, and 17 indicates a screw.

Claims (10)

(57) [Claims] 1. A nut-cage assembly comprising a nut (9) and a retainer (1) for accommodating the nut (9) and having a guide means for guiding one of the nuts to the other. Simultaneously guides the translation along the screw axis (18) and the rotation about its axis, and the nut has at least one area projecting from an opening in the wall, the nut being fixed to the retainer. When in place, the assembly is able to pass through the opening in the wall, and also includes locking means with the nut to prevent rotation of the nut relative to the retainer at a stop position where the area of the nut projects from the opening. A nut-retainer assembly, wherein the retainer comprises a retainer. 2. The retainer (1) displaces the nut from a predetermined position when the nut is displaced along the screw axis (18) in a direction in which the screw is tightened into the nut (9). 2. The nut-cage assembly according to claim 1, further comprising at least one cam (6) for driving the nut (9) to rotate to a stop position. 3. A nut-cage assembly according to claim 1, wherein the nut comprises a recess (12) that fits into the tip of the tool. 4. A nut (9) and a bottom (5) of the retainer (1) having a complementary shaft (11) and a hole for maintaining the nut (9) in place on the bottom. The nut-cage assembly according to any one of claims 1 to 3, further comprising (7). 5. A nut (9) comprising a body (19) having a cylindrical center and at least one ear (1) extending therefrom.
0), the retainer (1) comprises two arms (4) each having a curved portion (20) centered on the screw axis (18), and the cylindrical central body (N) of a nut. 19) and the bend (20) form the translation and rotation guide means;
5. A method according to claim 1, wherein the ear and the arm form locking means for locking the rotation of the nut with respect to the retainer. A nut-cage assembly according to any one of the preceding claims. 6. The nut has two ears (10) provided at opposite positions on the diameter line, and the retainer has a rectangular bottom (5) and a corner at a diagonal opposite position of the bottom. 6. A nut-cage assembly according to claim 5, comprising two arms (4) extending from the bottom at right angles to the bottom. 7. At least one arm (4) holds the nut (9) when the nut (9) is displaced along the screw axis in a direction in which the screw is tightened into the nut (9). 7. A nut-cage assembly according to claim 5, comprising a helical cam (6) concentric with the screw axis for transitioning from the position to the stop position. 8. The nut (9) according to claim 7, wherein a bevel (13) is provided on the lug (10) of the nut (9) to facilitate cooperation with the cam (6). Nut-retainer assembly. 9. The nut-cage assembly according to claim 3, wherein the tool is a screwdriver. 10. The nut-cage assembly according to claim 4, wherein said complementary shaft (11) and said bore (7) are polygonal.