JP2676181B2 - T nut - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a T-nut, and in particular, a female shaft is formed on the inner peripheral surface of a hollow shaft portion, and a plurality of claws are provided on a flange protruding outward from one end of the shaft portion. And a T nut provided with.

[0002]

2. Description of the Related Art FIG. 20 is a perspective view of a conventional T-nut 1 which is of interest to the present invention. FIG.
FIG. 1 is a plan view of the T-nut 1.

[0003] The T nut 1 is made of an integral metal material.
The shaft portion 2 and the flange portion 3 protruding outward from the first end portion of the shaft portion 2 are provided. The shaft 2 has a hollow cylindrical shape, and an internal thread 4 is formed on the inner peripheral surface thereof.

The flange portion 3 has two pairs of claws 5 and 6, 7 extending toward a second end opposite to the first end.
And 8 are arranged to face each other in the radial direction of the flange portion 3. Each of these claws 5 to 8 is formed by cutting and raising a part of the outer peripheral edge of the flange portion 3.

Such a T-nut 1 is constructed by inserting the shaft portion 2 into a hole provided in advance in an object to be fixed, such as wood, and driving the claws 5 to 8 into the object to be fixed. Fixed against. Thus, when the T-nut 1 is fixed to the object to be fixed, rotation of the T-nut 1 is prohibited, and a screw member such as a bolt is formed on the inner peripheral surface of the shaft portion 2. It can be screwed into the female screw 4.

Such a T-nut 1 is usually called a "hopper feed T-nut". Because Figure 2
0 and the T-nut 1 shown in FIG.
This is because it can be smoothly moved along the supply track provided in the nut fixing machine for fixing the T nut to the fixing target, and the T nut can be automatically supplied. The details of one type of hopper feed T-nut are described in, for example, British Patent No. 1,157,734.

FIG. 22 shows a state in which a plurality of T nuts 1 are supplied along the supply track 9. The supply track 9 includes a guide rail 10 having a C-shaped cross section. Another guide rail (not shown) is symmetrically arranged to face the guide rail 10, and each of the guide rails 10 receives the flange portion 3,
In addition, the T-nut 1 is moved along the supply track 9 while the pawls 5 to 6 are positioned between the guide rails 10. The supply track 9 is often bent, as shown in FIG. 22, thereby bringing the T-nut 1 into the desired position, and the shank 2 in the hole provided in the securing object, not shown.
Are aligned.

[0008]

However, when the T-nut 1 is moved along the supply track 9, in particular:
When they move along the curved part of the supply track 9, as shown in FIG. 23, the flange part 3 of the T-nut 1
But they tend to ride on top of each other. This often causes the supply of the T-nut 1 by the supply track 9 to be missed or blocked.

The phenomenon in which the flange portions 3 ride on the flanges 3 of the other T nuts 1 as described above is reduced to some extent by reducing the clearance given to the flange portions 3 in the guide rails 10 constituting the supply track 9. This can be prevented, but if the clearance is reduced in this way, then the frictional resistance between the flange portion 3 and the guide rail 10 increases, and the T nut 1 cannot be moved smoothly along the supply track 9. Occurs.

Therefore, it is an object of the present invention to provide a T-nut that can facilitate movement on a supply truck.

[0011]

A T-nut according to claim 1 of the present invention comprises a shaft portion and a flange portion which is made of an integral metal material and extends outward from a first end portion of the shaft portion. The shaft portion has a hollow cylindrical shape, and an internal thread is formed on the inner peripheral surface of the shaft portion. The flange portion is provided with two claws at respective positions facing each other in the radial direction. It is directed to a T-nut provided so as to project toward a second end opposite to the first end, and the outer peripheral edge of the flange portion is two adjacent to each other. The claws are characterized by having one continuous arcuate concave portion extending inwardly over the entire length thereof.

A T-nut according to a fourth aspect of the present invention includes a shaft portion made of an integral metal material and a flange portion protruding outward from a first end portion of the shaft portion, and the shaft portion is hollow. It has a cylindrical shape, and an internal thread is formed on the inner peripheral surface thereof, and two claws are provided on each of the flange portions at two positions facing each other in the radial direction, and the claws are opposite to each other and are opposite to the first end portion. In the T-nut provided so as to project toward the second end portion of the, the outer peripheral edge of the flange portion has a concave portion directed inward between the two claws adjacent to each other, and The claw is formed by cutting and raising a part of the outer peripheral edge of the flange portion, and the concave portion has two claws adjacent to each other on the outer peripheral side of the outer peripheral edge of the flange portion at each base. It is formed by overhanging.

[0013]

When a plurality of T-nuts according to the present invention are moved in a row along the supply track, the outer peripheral base end portions of the pair of pawls provided for one T-nut are adjacent to each other.
The flange portions of the nuts are brought into contact with the outer peripheral sides of the base portions of the corresponding pair of claws, whereby the outer peripheral edges of the flange portions of the other T nuts are kept in a positional relationship where they do not overlap each other.

In the present invention, the recess is formed by notching the outer peripheral edge of the flange inward in an arc shape, and two recesses adjacent to each other are provided at each base. It may be formed by projecting from the outer peripheral edge of the flange portion to the outer peripheral side, but in both cases, the outer peripheral edge of the flange portion overlaps the outer peripheral edge of the flange portion of the T-nut adjacent thereto. The actions are equivalent in the sense that they are prevented from reaching.

[0015]

Therefore, according to the present invention, the flange portions can be prevented from riding on the flange portions of the other T nuts, and the smooth supply of the T nuts along the feed track can be achieved. .

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 9 are for explaining a first related technique which is a reference for the present invention. Here, FIG. 1 is a perspective view showing a T-nut 11 according to this related technique, FIG. 2 is a plan view showing the T-nut 11, and FIG. 3 is a sectional view taken along line III-III in FIG. Is.

The T-nut 11 is integrally obtained, for example, by processing an iron-based metal plate into a metal plate.
2 and a flange portion 13 protruding outward from the first end portion of the shaft portion 12.

The shaft portion 12 has a hollow cylindrical shape, and its first
The portion to be caulked 14 at the second end opposite to the end of
And on the inner peripheral surface excluding the portion 14 to be caulked,
The female screw 15 is formed. The portion to be caulked 14 is preferably thinner than the portion 16 where the internal thread 15 is formed. Thereby, when forming the female screw 15, the thread cutting can be performed from the first end portion or the second end portion side of the shaft portion 12.

A part of the outer peripheral surface of the female screw forming portion 16 of the shaft portion 12 is crushed inward, whereby a recess 17 is formed in a part of the outer peripheral surface of the female screw forming portion 16. Two recesses 17 are provided with an angular interval of 180 degrees, for example. These recesses 17 are formed by strongly pressing these tools toward the female screw forming portion 16 while sandwiching a predetermined portion of the female screw forming portion 16 with a pair of suitable tools. The position where the recess 17 is formed is preferably closer to the flange 13. This is because, when a pair of tools is operated at a position distant from the flange portion 13, the cross section of the shaft portion 12 is easily deformed into a flat shape without forming the recessed portion 17 almost.

FIG. 4 is an enlarged view of a portion where the recess 17 of FIG. 3 is formed. FIG. 5 is a cross-sectional view taken along the line VV of FIG.

As a result of the formation of the recess 17 described above, the female screw 1
Some of the 5 threads are irregularized. This irregular portion 18
Are well shown in FIGS. 4 and 5. It should be noted that the irregularity of the threads in the irregularity portion 18 is not limited to the illustrated mode, and may be other modes.

When a bolt (not shown) is screwed into the internal thread 15, the irregular portion 18 cannot pass through the irregular portion 18 unless the bolt is relatively strongly turned. At this time, in the irregular portion 18, a part of the thread may be crushed. As a result, the screwed state of the bolt with respect to the T-nut 11 is locked, and the bolt is prevented from loosening from the T-nut 11.

If the above advantages are not desired, the recess 17 and the irregular portion 18 may not be provided.

Referring again to FIGS. 1 to 3, the flange portion 13 has a plurality of, for example, two pieces formed by crushing a part of the outer peripheral edge of the flange portion 13 from the outside to the inside. Claws 19 are provided so as to project toward the second end of the shaft portion 12 at an angular interval of 180 degrees. As a result of the claws 19 being formed on the outer peripheral edge of the flange portion 13, a notch 20 having a substantially semicircular cross section is left.

The flange portion 13 is located in the vicinity of the claw 19 and on the outer peripheral side of the claw 19, and the flange portion 1
An abutment wall 21 is provided which rises in a direction substantially perpendicular to the plane in which 3 extends. In this related technique, the contact wall 21
Are located on both sides of each claw 19.

The contact wall 21 is formed at the same time when the pawl 19 is formed. At a stage before the claw 19 and the contact wall 21 are formed, the flange portion 13 has a shape as shown in FIG. That is, the flange portion 13 is
It has a substantially circular shape having an overhang 22 at a position where the claw 19 is to be formed. These overhangs 2
By crushing 2 from the outside to the inside, the nail 19
Are formed, and at the same time, abutting walls 21 are formed on both sides of each. If the claw 19 and the contact wall 21 are formed by deforming the projecting portion 22 as described above, the contact wall 21 is formed.
Can be easily located on the outer peripheral side of the claw 19.

The formation of the recess 17 in the shaft portion 12 described above is preferably carried out before the formation of the claw 19 and the contact wall 21 in the flange portion 13. This is because the presence of the claw 19 and the contact wall 21 may hinder the formation of the concave portion 17 near the flange portion 13.

Regarding the positional relationship between the recess 17 and the claw 19 in the circumferential direction, the positional relationships shown in FIGS. 1 to 3 are merely examples. That is, the recess 17 and the claw 19 are respectively formed in different steps, and the direction of the T-nut 11 when subjected to each step varies variously depending on the situation at that time. As a result, the recess 17 and the claw 1
The positional relationship with 9 changes variously depending on the product, and
Regardless of the position of the concave portion 17 with respect to the claw 19, the action is the same. The number of recesses 17 provided is
The number is not limited to two, and may be one or three or more, for example.

In FIG. 1, a supply track 23 for guiding the supply of the T-nut 11 is shown in phantom lines. FIG.
FIG. 7 is a sectional view taken along the line VII-VII in FIG. 1. FIG.
A plurality of T nuts 11 are connected in series to the supply truck 2
The state of moving along 3 is shown in plan view.

The supply track 23 is shown in FIGS.
Similar to the supply track 9 shown in FIG. 1, it is provided with a pair of symmetrically arranged guide rails 24 and 25 having a C-shaped cross section.
The flange portion 13 is received in each of the guide rails 24 and 25, and the T-nut 11 is provided along the supply track 23 while the pawl 19 and the contact wall 21 are positioned between the guide rails 24 and 25. Be moved.

As mentioned above, the guide rails 24 and 2
By positioning the claw 19 and the contact wall 21 between the five, the direction of the T-nut 11 is regulated. by this,
As shown in FIG. 8, two T nuts 11 adjacent to each other
The contact wall 21 of one T-nut 11 is
The abutment wall 21 of the nut 11 is abutted, so that the flange portion 13 of one T-nut 11 is made to contact the other T-nut 11.
Riding on the flange portion 13 is prevented. Therefore, the plurality of T-nuts 11 are provided in the supply truck 23.
Can be smoothly moved along.

Such a T-nut 11 is used, for example, as shown in FIG. With reference to FIG. 9, a through hole 27 is provided in advance in the fixing target object 26 made of wood, for example. First, the T nut 11 is inserted into the through hole 27.
The shaft portion 12 of is inserted. In this state, the caulking machine applies caulking processing to the caulking planned portion 14, and the caulking portion 14a is formed on the one surface side of the fixing target object 26. At this time, at the same time, the claw 19 is set in a state of biting into the other surface of the sticking target 26. In this way, the fixing of the T-nut 11 to the fixing target 26 is completed.

In such a mounted state of the T-nut 11, the claw 19 prohibits the T-nut 11 from rotating with respect to the fixed object 26, and the flange portion 1
The T nut 11 is prevented from coming off from the through hole 27 by sandwiching the object 26 to be fixed by 3 and the caulked portion 14a. Therefore, the T-nut 11 is attached to the fixed object 26.
Firmly fixed against Further, in such an attached state, the size of the sticking target object 26 may change over time. For example, when the sticking target 26 is wood, it may shrink due to drying.
Nevertheless, if the claw 19 bites into the fixing target object 26, it is possible to maintain a state in which the T-nut 11 is prohibited from rotating with respect to the fixing target object 26 for many years.

FIG. 10 is a perspective view showing a T-nut 28 according to a second related technique which is a reference for the present invention.

This T-nut 28 is provided with a shaft portion 29 and a flange portion 30 like the T-nut 11 according to the above-mentioned first related art, and the shaft portion 29 is provided with a portion 31 to be caulked. Although not shown, a female screw is formed on a portion of the inner peripheral surface of the shaft portion 29 other than the portion to be caulked 31.

Two pawls 32 and 33 are provided in the radial direction of the flange portion 30 so as to be adjacent to each other in the radial direction. The method of forming the claws 32 and 33 is substantially the same as the method of forming the claw 19 described above, and is formed by crushing a predetermined portion of the outer peripheral edge of the flange portion 30 from the outside to the inside. It is a thing. These claws 32
As a result of the formation of and 33, notches 34 and 35 having a substantially semicircular cross section are left on the outer peripheral edge of the flange portion 30.

As a result of the formation of the claws 32 and 33 as described above, between the two claws 32 and 33 which are close to each other,
An abutment wall 36 is provided. The abutment wall 36 is located on the outer peripheral side of the claws 32 and 33, and rises in a direction substantially perpendicular to the surface on which the flange portion 30 extends.

This T-nut 28 is also intended to be moved along the supply track with pawls 32 and 33 positioned between a pair of guide rails which provide the supply track. Then, during the movement along the supply track, one abutting wall 36 of the adjacent T-nuts 28 abuts on the abutting wall 36 of the other T-nut 28, so that the adjacent flange portions 30 are separated from each other. Overlapping with things is prevented. As a result, the plurality of T-nuts 28 can be smoothly moved along the supply track.

11 to 14 are for explaining the first embodiment of the present invention. Here, FIG.
1 is a perspective view of a T-nut 37 according to this embodiment, FIG. 12 is a plan view of the T-nut 37, and FIG.
It is sectional drawing which follows the line XIII-XIII of FIG.

Like the T nuts 11 and 28 described above, the T nut 37 is integrally obtained by, for example, sheet metal working of an iron-based metal plate, and the shaft portion 38 and the first end of the shaft portion 38. Flange 3 protruding outward from the section
9 is provided. The shaft portion 38 has a hollow cylindrical shape, and an internal thread 40 is formed on the entire inner peripheral surface thereof.

The flange portion 39 has two pairs of claws 41 and 4 extending toward a second end opposite to the first end.
2, 43 and 44 are arranged to face each other in the radial direction of the flange portion 39. Each of these claws 41 to 44 is formed by cutting and raising a part of the outer peripheral edge of the flange portion 39. More specifically, these nails 4
1 to 44, each pair of claws 41 and 42 and 43 and 44 has a pair of cuts extending in opposite directions on the peripheral edge portion of the flange portion 39 (the cutting line given by these cuts is shown in FIG. 12). "45", "46",
It is shown by "47" and "48". The cutting lines 45 and 46 are paired and extend in opposite directions, while the cutting lines 47 and 4
8 and 8 extend in opposite directions. ) Is formed, and the portions located outside these cuts are respectively
It is formed by bending at each end of the cut.

Two pairs of claws 4 are provided on the periphery of the flange portion 39.
It is preferable that protrusions 49 and 50 are provided at respective positions facing each other in the radial direction orthogonal to the radial direction in which 1 and 42 and 43 and 44 are opposed to each other. These protrusions 49 and 50 project toward the second end. These protrusions 49 and 50 are formed, for example, by crushing a part of the outer peripheral edge of the flange portion 39 from the outside to the inside. Therefore, the protrusions 49 and 50 have the claws 19, 32 and 3 in the above-described embodiment.
3 and its shape are similar. Such protrusions 49 and 50 can be easily formed by applying a press after forming the claws 41 to 44, for example. Protrusions 49 and 50 are provided on the outer peripheral edge of the flange portion 39.
As a result, the notches 51 and 5 having a substantially semicircular cross section are formed.
Two are left.

The method of forming the protrusions 49 and 50 is as follows.
The method is not limited to the method described above, and may be formed by bending, for example. In addition, a part of the outer peripheral edge of the flange portion 39 is
Such a protrusion may be formed by pressing from the bottom to the top according to FIG.

In this embodiment, each of the claws 41 to 44 is provided with a jagged shape. This brings an effect that the claws 41 to 44 that have been driven into the object to be fixed do not easily come off from the object to be fixed.

The base of each of the claws 41 to 44 is provided with a tongue piece that projects to the outer peripheral side of the flange 39, and the abutting walls 53, 5 are formed.
4, 55 and 56 are formed. These contact walls 53 to
56 is located on the outer peripheral side of the claws 41 to 44, and stands up in a direction substantially perpendicular to the surface on which the flange portion 39 extends.

In FIG. 11, a supply track 57 for guiding the supply of the T-nut 37 is shown in phantom lines. Further, FIG. 14 shows a state in which a plurality of T nuts 37 are continuously moving along the supply track 57.

Like the supply tracks 9 and 23 described above, the supply track 57 includes a pair of symmetrically arranged guide rails 58 and 59 having a C-shaped cross section. A flange 39 is received in each of the guide rails 58 and 59, and the guide rails 58 and 59 are provided.
The T-nut 37 is moved along the supply track 57 while the pawls 41 to 44 are positioned between them.

During such movement of the T-nut 37, as shown in FIG. 14, one of the contact walls 53 and 54 of the adjacent T-nuts 37 is adjacent to the other contact wall 5 as shown in FIG.
It abuts 5 and 56 and prevents the flange 39 from overlapping each other. Note that T
Depending on the direction of the nut 37, for example, the contact wall 53
Entering between the contact walls 55 and 56, the flange portion 39
However, even in that case, the presence of the contact wall 53 prevents the flange portions 39 from overlapping each other.

Further, in this embodiment, the projections 49 and 50 formed on the flange portion 39 are located in the guide rails 58 and 59, respectively. At this time, as can be seen from FIG. 14, due to the presence of the protrusions 49 and 50, the clearance in each of the guide rails 58 and 59 is in a state where there is almost no clearance. Therefore, the T-nut 37 is prevented from being largely lifted in the guide rails 58 and 59, which also prevents the flange portions 39 from overlapping each other.
In addition, the projections 49 and 50 have guide rails 58 and 59.
Even when it comes into contact with, the protrusions 49 and 50 have sharp tips, so that the frictional resistance thereof can be made extremely low.

From these facts, the T-nut 37 can be smoothly moved along the supply track 57.

Further, the protrusions 49 and 50 are provided on the T nut 3
The following aspects also contribute to the smooth movement of No. 7 along the supply track 57. That is, a notch is formed along the cutting lines 45 to 48 shown in FIG.
When forming ~ 44, the cutting line 4 is formed on the flange portion 39.
Burrs are often formed along 5-48 that project in the same direction that the claws 41-44 project. The presence of such burrs hinders the smooth movement of the T-nut 37 along the supply track 57. As such, burrs are typically sought to be removed by barrel polishing. However, it is not so easy to completely remove the burr. According to this embodiment, the protrusions 49 and 50 are projected higher than the height of the burr even if the burr is not completely removed or if the burr is not removed at all. Therefore, the presence of the burr can prevent the T-nut 37 from being prevented from being moved along the supply track 57. Therefore, the cost required for the finishing process of the T nut 37 including the barrel polishing can be reduced.

FIG. 15 is a perspective view showing a T-nut 60 according to the second embodiment of the present invention. This T nut 60
Includes many elements common to the above-mentioned T nut 37. Therefore, in FIG. 15, the elements corresponding to the elements shown in FIG. 11 are designated by the same reference numerals, and the duplicated description will be omitted.

The abutment walls 53a, 54a, 55a and 56a included in the T-nut 60 shown in FIG. 15 are two claws 41 provided with the tongue pieces for providing these abutment walls 53a to 56a in close proximity to each other. And 42 or 43 and 44 by folding to extend towards each other. According to this embodiment, the contact wall 53
The area given by each of a to 56a can be made larger than that of the contact walls 53 to 56 described above. Therefore, the contact state between the contact walls 53a and 54a and the contact walls 55a and 56a can be maintained more stably. As a result, the flange portions 39 can be more reliably prevented from overlapping each other.

FIG. 16 is a perspective view showing a T-nut 61 according to the third embodiment of the present invention. This T nut 61
Is folded such that the tongues that provide each of the abutment walls 53b, 54b, 55b and 56b are moved away from each other of the two pawls 41 and 42 or 43 and 44 that are provided close to each other. There is. Except for this point, the T-nut 61 is substantially the same as the T-nut 60 shown in FIG. Also in FIG. 16, FIG.
The elements corresponding to the elements shown in 1 are designated by the same reference numerals, and the duplicated description will be omitted.

The first embodiment shown in FIGS. 11 to 14, the second embodiment shown in FIG. 15, and the third embodiment shown in FIG. 16 are respectively abutting walls 53 to 56, 5.
3a to 56a and 53b to 56b are formed, so that the flange portion 39 is provided at the base of each of the claws 41 to 44.
It has a tongue that projects to the outer peripheral side. As a result, in all of these embodiments, the outer peripheral edge of the flange portion 39 is positioned so as to form a concave portion between each of the two claws 41 and 42 and 43 and 44 which are adjacent to each other. It has the structure This structure
It can also be realized by the fourth embodiment described below.

FIG. 17 is a perspective view showing a T-nut 62 according to the fourth embodiment of the present invention, FIG. 18 is a plan view of the T-nut 62, and FIG. 19 is a side view of the same.

The T-nut 62 is provided with a shaft portion 63 and a flange portion 64 extending outward from the first end portion of the shaft portion 63, like the above-mentioned T-nut 37, for example. Shaft 63
Has a hollow cylindrical shape, and an internal thread 65 is formed on its inner peripheral surface.
Is formed.

The flange portion 64 has two pairs of claws 66 and 6 extending toward a second end opposite to the first end.
7, 68 and 69 are arranged to face each other in the radial direction of the flange portion 64. Each of the claws 66 to 69 is formed by cutting and raising a part of the outer peripheral edge of the flange portion 64. For each of the claws 66 to 69,
It is given a jagged shape.

The feature of this embodiment is the shape of the outer peripheral edge of the flange portion 64. That is, between each of the two claws 66 and 67, 68 and 69 which are close to each other, the outer peripheral edge of the flange portion 64 is inwardly cut out, thereby forming the recesses 70 and 71, respectively. Has been done. In this embodiment, the inward cutouts for forming the recesses 70 and 71 are provided by arcuate edges 72 and 73. These arcuate edges 72 and 73 allow the recesses 70 and 71 to be formed while providing a smoother edge.
However, if this advantage is not desired, the recess may be formed by another edge shape.

As described above, according to this embodiment as well, the two claws 66 and 67, 68 and 6 which are adjacent to each other are provided.
Since the recesses 70 and 71 are formed between each of the nine, when the plurality of T-nuts 62 are moved along the supply track, for example, the claw 6 of one T-nut 62.
The presence of the recesses 70 and 71 advantageously prevents the flanges 64 from overlapping one another even if the 6 is located between the adjacent T-nuts 62, for example the pawls 68 and 69. It

The effect of preventing the adjacent flange portions 64 from overlapping each other is further promoted in the following manner in this embodiment. That is, as shown particularly well in FIG.
The outer peripheral edge of the flange portion 64 located between the individual claws 66 and 67 (and claws 68 and 69 (not shown in FIG. 19)), that is, the arcuate edge 72 (and 73).
Is provided with rounded shapes 74 and 75 for positioning the bases of the claws 66 to 69 at positions closer to the second end side. As a result, the flange portion 6
In No. 4, between the two claws 66 and 67 (and 68 and 69), the same effect as the increase in the wall thickness is provided.

Further, the outer peripheral edge of the flange portion 64 located between the two claws 66 and 67 (and 68 and 69) adjacent to each other, that is, the arc-shaped edge 72 (and 7).
In FIG. 3), as shown by the broken line in FIG. 19 to show the base portion, a burr 76 during cutting that protrudes toward the second end is left. In order to leave more such burr 76,
It is preferable to select the dimensional relationship between the punch and the die so that more burrs 76 are positively formed at the time of cutting the outer periphery of the flange portion 64.

The presence of the above-described rounded shapes 74 and 75 and the burr 76 effectively acts to prevent the adjacent flange portions 64 from overlapping each other, but in this embodiment, these rounded shapes 74 and 75 are used. A modification in which at least one of the countermeasure and the countermeasure by the burr 76 is not applied is also possible.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a T-nut 11 according to a first related art, which is a reference for the present invention, and also shows a supply track 23 in an imaginary line.

FIG. 2 is a plan view showing a T-nut 11 shown in FIG.

FIG. 3 is a sectional view taken along line III-III in FIG. 2;

FIG. 4 is an enlarged view of a portion where a recess 17 of FIG. 3 is formed.

FIG. 5 is a sectional view taken along line VV in FIG. 4;

6 is a plan view of the T-nut 11 corresponding to FIG. 2, showing a state before forming the claw 19 and the contact wall 21. FIG.

7 is a cross-sectional view taken along the line VIII-VIII in FIG.

8 is a plan view showing a state in which the plurality of T-nuts 11 shown in FIG. 1 are moving along a supply track 23. FIG.

9 is a cross-sectional view showing a usage state of the T-nut 11 shown in FIG.

FIG. 10 is a perspective view showing a T-nut 28 according to a second related technique, which is a reference for the present invention.

FIG. 11 is a T-nut 37 according to the first embodiment of the present invention.
And a supply track 57 is also shown by an imaginary line.

12 is a plan view showing a T-nut 37 shown in FIG.

13 is a cross-sectional view taken along the line XIII-XIII in FIG.

14 is a front view showing a state in which the plurality of T-nuts 37 shown in FIG. 11 are continuously supplied along a supply track 57, and one guide rail 59 is omitted.

FIG. 15 is a T nut 60 according to a second embodiment of the present invention.
FIG.

FIG. 16 is a T-nut 61 according to the third embodiment of the present invention.
FIG.

FIG. 17 is a T nut 62 according to a fourth embodiment of the present invention.
FIG.

18 is a plan view of the T-nut 62 shown in FIG.

19 is a side view of the T-nut 62 shown in FIG.

FIG. 20: Conventional T-nut 1 of interest to the present invention
FIG.

21 is a plan view showing the T-nut 1 shown in FIG. 20. FIG.

22 is a front view showing a state where the plurality of T-nuts 1 shown in FIG. 20 are continuously supplied along the supply track 9, and one of the guide rails is not shown.

FIG. 23 is a view corresponding to FIG. 22, showing a flange portion 3;
Shows the state of riding on the other flange portions 3.

[Explanation of symbols]

11, 28, 37, 60, 61, 62 T nut 12, 29, 38, 63 Shaft portion 13, 30, 39, 64 Flange portion 14, 31 Caulking planned portion 15, 40, 65 Female screw 16 Female screw forming portion 18 Irregularity Part 19, 32, 33, 41, 42, 43, 44, 66, 6
7, 68, 69 Claw 21, 36, 53-56, 53a-56a, 53b-5
6b Abutment wall 22 Overhang 23,57 Supply track 24,25,58,59 Guide rail 26 Fixed object

Claims (7)

(57) [Claims] 1. A shaft portion, which is made of an integral metal material, and a flange portion that extends outward from a first end portion of the shaft portion, wherein the shaft portion has a hollow cylindrical shape and has an inner periphery thereof. A female screw is formed on the surface, and the flange portion is provided with two screws at respective positions facing each other in the radial direction.
In a T-nut provided such that the claws are close to each other and project toward a second end opposite to the first end, the outer peripheral edge of the flange is two close to each other. 2. The T-nut, characterized by having one continuous arcuate concave portion extending inwardly over the entire length between the claws. 2. The base of each claw is located at a position closer to the second end side on the outer peripheral edge of the flange located between the two claws adjacent to each other. The T-nut according to claim 1, which has a rounded shape. 3. A burr at the time of cutting that protrudes toward the second end side is left on the outer peripheral edge of the flange portion located between the two claws that are close to each other. The T-nut according to 1 or 2. 4. A shaft portion and a flange portion which are made of an integral metal material and project outward from a first end portion of the shaft portion, wherein the shaft portion is hollow and has an inner circumference. A female screw is formed on the surface, and the flange portion is provided with two screws at respective positions facing each other in the radial direction.
In a T-nut provided such that the claws are close to each other and project toward a second end opposite to the first end, the outer peripheral edge of the flange is two close to each other. Between the claws of the claws, the claws are formed by cutting and raising a part of the outer peripheral edge of the flange part, and the claws are two adjacent claws. The T-nuts formed by the claws extending outward from the outer peripheral edge of the flange portion at each base portion. 5. The T-nut according to claim 4, wherein a portion of each base of each of said claws, which extends outwardly of the claw, is bent so as to extend toward the other of said two claws. 6. A portion of the base of each of said claws, which protrudes toward the outer peripheral side, is bent so as to be away from each other of said two claws provided in close proximity to each other.
T-nut described in. 7. A protrusion protruding toward the second end portion at each position on a peripheral portion of the flange portion, which is opposed in a radial direction orthogonal to a radial direction in which the two claws are opposed to each other. 7. The T-nut according to any one of claims 4 to 6, further comprising: