JPH0610171Y2 - anchor - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an anchor, and more specifically to an open leg type anchor that is driven into a material that does not have restorability such as cellular concrete.

[Conventional technology]

As a conventional anchor used for fixing various members to a material such as cellular concrete, an open leg nail 1 shown in FIG. 6 is used, for example.

The open leg nail 1 is provided with a slit 4 for dividing the leg portion 2 into a plurality of divided legs 2a, 2a along the axial direction from the tip to the head 3 side in the leg portion 2, and the tip of each divided leg 2a, 2a. The inclined surfaces 5 and 5 for opening legs are formed on the surface where the slit 4 is provided in the portion, and the wedge member 6 is interposed between the inclined surfaces 5 and 5.

When the above-described spread leg nail 1 is driven into cellular concrete, the leg portion 2 that has entered into the cellular concrete is expanded by the wedge member 6, and the inclined legs 5 and 5 divide the split legs 2a and 2 into two.
c opens the legs and exhibits pullout resistance.

[Problems to be solved by the device]

By the way, since the conventional open-leg nail has a structure in which the inner surfaces of the ends of the split legs 2a and 2a are formed into inclined surfaces 5 and 5, and the wedge member 6 is sandwiched between them, it is not possible to use them in aerated concrete. The start timing of the spread leg and the size of the spread leg are affected by the hardness and brittleness of the material.

In other words, when driving into a hard material, the split leg that receives the entry resistance tries to start opening immediately after driving, and when driving into a brittle material, the split leg will open itself because the driving resistance is small. Go straight without doing.

In this way, the hardness and fragility of the material to be driven causes variations in the open leg state, and in the case of a particularly rough and brittle material, it becomes difficult to obtain a predetermined open leg state, and there are restrictions on the materials that can be used for the open leg nails. There is a problem.

Therefore, an object of the present invention is to provide an anchor that can always obtain a reliable open leg state at a position of a predetermined driving depth regardless of the conditions of the material to be driven.

[Means for Solving the Problems]

In order to solve the above problems, the present invention has an anchor body in which a leg portion is divided into a plurality of axial slits provided from the distal end toward the head side, and the leg portion within the slit of the leg portion. A thin plate portion that is located near the tip and that has a leg holding member that is provided near the head with a portion that projects to the outside of the leg, and the tip of the leg holding member overlaps the tip end surface of the leg. Is adopted.

[Action]

When it is driven into aerated concrete, the tip of the split leg is covered by the thin plate part of the leg holding member, so it goes straight without opening the leg, and the tip side of the leg enters the predetermined amount and the leg holding member When the portion projecting to the outside comes into contact with the object to be fixed, the leg holding member cannot enter any more.

For this reason, if further driving is continued, the split leg pushes the thin plate portion to enter, and from this point, the split leg enters with the leg open, and the split leg condition is always constant and the split leg is opened. There is a thin plate portion between the legs to hold the split leg from the inside [Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 5 of the accompanying drawings.

As shown in FIG. 1, the anchor 11 has an anchor body 15 that is divided into a pair of split legs 12a and 12a by an axial slit 14 provided on the leg 12 from the tip toward the head 13.
And a leg holding member 16 mounted at a position near the tip in the slit 14 of the leg 12.

As shown in FIG. 2, the anchor body 15 has two split legs 1.
2a and 12a are formed with inclined surfaces 17, 17 for opening legs on the inner surfaces facing each other across the slit 14 so as to have a splay-like inclination toward the distal end, and the distal surfaces 18 of both split legs 12a, 12a are formed. , 18 are flat surfaces.

As shown in FIGS. 1 and 2, the leg portion holding member 16 is provided with both side inclined surfaces 17 at a lower end of a strip plate 19 having a width that fits into the slit 14 and fits within the diameter of the leg portion 12. 17
A sharp rhomboid tip portion 20 that fits in the space between them, an open leg member 22 that has protrusions 21 and 21 protruding to the outer surface of the leg portion 12 on both sides of the upper end portion, and a ring shape that is externally fitted and inserted into the leg portion 12. It is formed by a combination with the washer 23.

When the leg opening member 22 is set on the leg portion 12, as shown in FIG. 3, the protruding portions 21, 21 on both sides are located in the middle portion of the leg portion 12 and protrude to the outside of the leg portion 12. Become.

The split leg members 22 are provided on both sides of the distal end portion 20 on both sides of the split leg 1.
Thin plate portions 24, 24 having the same shape as the front end surfaces 18, 18 of 2a, 12a and overlapping the front end surfaces 18, 18 are integrally provided.

In the illustrated case, the head portion 13 of the anchor body 15 has a straight shape, but a large diameter head portion may be provided.

The anchor of the present invention has the above-mentioned structure. When the leg holding member 16 is set on the tip side of the anchor body 15, the tip 20 of the leg opening member 22 is housed between the inclined surfaces 17 and 17, and the leg 12 is held. A washer 23, which is externally inserted from the tip side, abuts on the protrusions 21 and 21, and holds the split legs 12a and 12a so as not to spread.

FIGS. 3 to 5 show steps in the case of fixing the object B to be fixed to the cellular concrete A by using the anchor 11 described above.

As shown in FIG. 3, when the anchor 11 is driven into the cellular concrete A, the thin plate portions 24, 24 of the opening leg member 22 are divided into the split legs 1.
2a, 12a covering the end faces 18, 18 of the split leg 12
Since the a and 12a are prevented from opening, the leg portion 12 enters the straight state.

That is, if the thin plate portions 24, 24 provided on the leg member 22 overlap the tip surfaces 18, 18 of the split legs 12a, 12a,
There is no entry of cellular concrete A between the inclined surfaces 17 of the split legs 12a, 12a, and the split legs 12a, 12a remain closed.

When the leg portion 12 enters a predetermined amount, as shown in FIG.
3 comes into contact with the object B to be fixed, and the washer 23 has projections 21, 2
The spread leg member 22 with which 1 is in contact cannot enter any more.

When further driving is performed from this state, the split legs 12a, 12a enter the stopped leg member 22, and the thin plate portions 24, 24 are bent and enter as shown in FIG.

The tip ends of the split legs 12a, 12a are the tip end portions 2 of the leg members 22.
It opens to both sides by 0, and the inclined surfaces 17 and 17 act to open the legs in an arc shape and enter the head 1 as shown in FIG.
At 3, the object B is fixed.

When the anchor body 15 is completely driven, the tip portion 20 of the spread leg member 22 is provided between the split split legs 12a and 12a.
And thin plate portions 24, 24 exist, and these are the split legs 12.
By holding a and 12a from the inside, the pullout resistance of the anchor body 15 is improved.

As described above, the split legs 12a, 12a are not opened until the projections 21, 21 of the leg member 22 come into contact with the fixed object B through the washers 23 from the tips thereof, and therefore the split legs 12a, 12a are not opened. The split legs 12a, 12a do not open until the tip member 20 of the leg member 22 and the protrusions 21, 21 are driven in an amount corresponding to the distance.
It is possible to always open the leg from a position with a constant driving depth without being affected by the hardness and brittleness of the material such as the cellular concrete A.

〔effect〕

As described above, according to the present invention, the split legs of the anchor body can be opened at a predetermined driving depth position,
Regardless of the hardness or brittleness of the driving material, it is possible to always obtain a predetermined open leg state, and it is possible to use the driving material in a wide range without limitation.

Further, since the thin plate portion of the spread leg member is pushed and bent by the split legs, the split split legs that are opened are held from the inside, so that the pull-out resistance can be improved.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an anchor according to the present invention, FIG. 2 is an exploded perspective view in which an essential part of the same is enlarged, FIGS. 3 to 5 are explanatory views showing an anchor driving process, and FIG. FIG. 3 is a front view showing the open leg nail of FIG. 11 ... Anchor, 12 ... Leg, 12a ... Divided leg, 13 ... Head, 14 ... Slit, 15 ... Anchor body, 16 ... Leg holding member, 17 ... Slope, 18 ... ... Tip surface, 20 ... Tip portion, 21 ... Projection portion, 22 ... Opening member, 23 ... Washer, 24 ... Thin plate portion.

Claims (1)

[Scope of utility model registration request] 1. An anchor body in which a leg part is divided into a plurality of parts by axial slits provided from the tip toward the head side, and the anchor body is located in the slit of the leg part toward the tip end of the leg part and near the head part. An anchor characterized by comprising a leg holding member having a portion projecting to the outside of the leg portion at a portion of, and a thin plate portion overlapping the tip end surface of the leg is provided at the tip end portion of the leg holding member. .