JP2001304229A - Insert female screw - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an insert female screw to be threaded to a male screw portion of a knob; pressed into a hole in a plate face in this state while holding the knob in hand, and mounted simply with the half-round rotation of the knob, having improved loosening strength by expanding the insert female screw at its front portion to the outward direction using both the pulling force of the knob on the male screw portion through the half-round rotation and the contact of the knob with a flange face for further more biting it into the peripheral wall of the hole. SOLUTION: Streak protrusions 12d... are formed on the outer periphery wall of a female screw body 12a having a screw groove 12b engraved in the inner periphery face of a resin or metal small cylinder. A plurality of cutouts 12g, 12g are formed ranging from a rear edge 12r of the screw body 12a to the midway in the axial direction for vertically equal-splitting at a corresponding position in the axial direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a knob for operating a door of furniture such as a chest, a cabinet, a storage box, a cupboard, etc., attached to a thick door, and a hook, etc. attached to a thick plate wall. The present invention relates to an insert female screw which is used to attach firmly and easily when attaching.

[0002]

2. Description of the Related Art For example, when a knob with an external thread for opening and closing the door is attached to a door of a furniture or the like, if the door is formed of a material such as a thick wooden board, a plywood, or a chip pod, these are inserted into a thread groove of the external thread. When the operation knob is pulled strongly or used for a long period of time, the screw hole becomes loose and the operation knob becomes loose and easy to come off because the material is difficult to cut into and the material is soft. As a method for dealing with such a defect, conventionally, a resin or metal insert female screw is interposed between a male screw and a hole formed in a mounting portion such as a door, and the insert female screw is cut into a peripheral wall of the hole. Then, a method is employed in which the male screw of the knob is screwed onto the internal female screw of the insert to prevent the knob from coming off.

FIGS. 7 to 11 show these insert female threads according to the prior art.

FIG. 7 (a) is a front view of an insert female screw according to the prior art, partially cut away, FIG. 7 (b) is a right side view thereof, and FIG. 8 is a sectional view showing a used state. It is.

The insert female screw 1 according to the prior art shown in these figures has a box-shaped internal screw hole 1a inside a cylindrical body.
Are formed, and on the outer peripheral portion, a serrated strip projection 1b is formed.
Made of nylon resin with a large number of
The direction of the inclination b is the tip side 1 of the insert female screw 1.
The slope is directed to f, and the rear end side 1r has an upright shape, that is, a shape that is easy to enter and hard to slip out.

FIG. 8 shows an example of the attachment. As shown in FIG. 8, first, a hole 2a is formed in the plate surface 2 at the attachment point so that the insert female screw 1 can be lightly pressed in by a drill.
A method of press-fitting the insert female screw 1 into the hole 2a and subsequently screwing the male screw 3a of the knob 3 into the insert female screw 1 has been adopted. In this way, the projection 1b of the insert female screw 1 bites into the peripheral wall surface of the hole 2a of the plate surface 2 so that the insert female screw 1 becomes difficult to come off, and the male screw 3a of the knob 3 is screwed into the insert female screw 1. As a result, the knob 3 is difficult to come off, and is securely attached to the corresponding portion of the plate surface 2.

Other insert female threads according to the prior art include those of the type shown in FIGS. 9 and 10, and those shown in FIG.

[0008] Among these, the insert female screw shown in FIGS. 9 and 10 will be described. FIG. 9A is a front view showing another type of insert female screw according to the prior art, and FIG. 9B is a left side view thereof. FIG. 3C is a front sectional view. This type of prior art insert female screw 10
Is formed on the outer peripheral wall of the cylindrical plate in which the screw hole 10a is formed, a large number of circumferential projections 10b are formed in the circumferential direction.
It is made of nylon resin having two notches 2c, 2c, and is attached by the same method as in the case of the insert female screw 1 as shown in FIG.

Next, the insert female screw shown in FIG. 11 will be described. FIG. 11 (a) is a front view showing another type of insert female screw according to the prior art, partially cut away, and FIG. 11 (b) is a right side view. FIG. This type of internal female screw 11 according to the prior art is made of brass in which a helical strip projection 11b is formed on the outer peripheral wall of a cylindrical body having a screw hole 11a formed therein. Unlike the insert female screws 1 and 11, they are screwed into holes in the plate surface and attached.

Since a plurality of strips 1b, 10b, 11b of various shapes for preventing the stopper from being removed are formed on the outer peripheral surface, these strips 1b, 10b, 11b are formed on the inner peripheral wall of the hole 2a of the plate surface 2. The insert female screws 1, 10, 11 into which the holes 2a are press-fitted are difficult to come off. In addition, since the screw holes 1a and the screw holes 10a and 11a formed in the insert female screws 1, 10, and 11 and the male screw portion 3a of the knob 3 are screwed, the knob 3 is securely fixed to the plate surface 2. You can do it.

[0011]

However, in the case of the above-mentioned various types of internal female inserts according to the prior art, when the female thread made of resin such as nylon is caught by a thread after being press-fitted into a hole in a plate surface to be attached. In order to prevent the metal from being pulled out, metal screws such as brass were screwed into holes to prevent the metal from being pulled out. However, such mounting methods had the following problems.

One of the reasons is that after a female insert screw made of resin such as nylon is press-fitted into a hole to be mounted, the projection is caught on the peripheral wall of the hole. This catch is caused by cutting into the peripheral wall of the hole. After the press-fitting, little force was exerted on the peripheral wall of the hole by the strip projection. For this reason, the strength against pulling out was not sufficient, although it was certain. As a result, when the knob was pulled strongly or when the door with the knob attached was opened and closed heavily, it was easy to come off together with the insert female screw.

In this regard, since the insert female screw shown in FIG. 11 is of the type screwed into the hole, the strength in the pull-out direction is considerably stronger than that of the press-fit type made of resin. The operation of inserting the insert female screw into the hole is time-consuming, and has deteriorated the mounting work efficiency.

In addition, press-fitting of the insert female screw,
Since the screwing operation was performed using a tool, the workability was poor, and the plate surface to be attached was sometimes damaged during the press-fitting or screwing operation.

The present inventor has faced the problems of the various insert female screws according to the prior art described above, and has been diligently studying what kind of structure of the insert female screw is desirable while examining the cause thereof, and has repeatedly made prototypes. Finally, the inventor has developed an insert female screw according to the present invention.

The insert female screw according to the present invention completed through such a process is screwed into the male screw portion of the knob, and in this state, the knob is held by hand and pressed into the hole in the plate surface, and the knob is inserted. Just half a turn, it can be easily attached as if it were a touch.Moreover, the half turn of the knob allows the knob to be pulled by the male thread and the knob comes into contact with the flange surface, so that the front part of the insert female screw By pushing outwardly, the penetration of the hole into the peripheral wall is further strengthened to increase the strength against disengagement in each step, and the pressure applied to this flange surface can prevent the knob from loosening, making it extremely useful and inexpensive. It is intended to be able to be manufactured.

[0017]

The insert female screw according to the present invention proposed to achieve the above object has a thread groove formed on the inner peripheral surface of a small cylindrical body made of resin or metal. A protrusion or a thread is formed on the outer peripheral wall of the female screw main body, and a plurality of cutouts that equally vertically divide the relevant position in the axial direction at a position extending from the rear end edge of the screw main body to an intermediate portion in the axial direction are provided. It is characterized by being formed.

The most distinctive feature of the shape of the insert female screw according to the present invention is that the insert female screw is vertically cut in the axial direction from the rear end edge (knob side end) of the insert female screw to an intermediate portion in the axial direction. The point is that a notch is formed.

The width of the cutout portion may be as narrow as a cut line but wide enough to maintain the function of the female screw body. In addition, the length of the cutout portion is sufficient if the rear end of the female screw body at least is widened on the inner peripheral wall of the hole or buckled in the expanding direction when the hole is mounted in the hole. Although it depends on the length and size of the insert female screw, it includes one from a shallow end in the front direction to a deeper one in the axial direction to the extent that the function of the insert female screw can be maintained. The number of the cutouts is preferably two to four evenly divided in the axial direction, but is not particularly limited to this number.

The reason why the notch is formed in such a position and direction is that when the male screw part of the knob is inserted and the knob is finally turned in a direction to be strongly tightened, the rear part of the insert female screw has the notch part. Due to this, the insert female screw becomes extremely difficult to be pulled out of the hole in the plate surface by spreading or buckling in the direction of biting into the inner wall of the hole in the plate surface due to the pulling force and contacting the tip of the knob. In addition, when the insert female screw is deformed in the rearward or widening direction as described above, a strong fastening pressure is applied to the male screw of the knob due to the repulsive force, so that the knob becomes difficult to be pulled out.

The male thread portion of the knob is screwed with the entire inner thread portion of the insert female screw, but only the tip from the center of the male thread portion of the knob is screwed into the inner thread portion of the insert female screw. Although it may seem that the internal female screw is made of a relatively soft resin such as nylon, the compression force accompanying the fastening is applied to the female insert screw. The thread is securely screwed close to the base of the male thread. Therefore, the fastening force of the male screw portion of the knob does not decrease.

Any kind of knob can be applied using the insert female screw of the present invention. However, in order to use the insert female screw of the present invention, it is necessary that the insert female screw be a plate material or the like thicker than at least the length of the insert female screw. In the present specification and the accompanying drawings, the description of mounting the knob is specified.However, when the insert female screw according to the present invention is used, the male screw portion of the knob to which the insert female screw is mounted can be pressed into the hole as it is and mounted. The present invention can also be applied to the mounting of a handle having two parts. That is, it is not limited to the mounting of the knob. Therefore, the present invention can be applied to a case where a hook is attached to a thick plate surface or the like.

In consideration of the above description, the material of the insert female screw according to the present invention is most preferably made of resin such as nylon, but may be made of metal such as brass, aluminum, or iron. Absent.

The insert female screw according to the present invention, besides the one having the above-mentioned structure, has a tip of an outer peripheral wall of a female screw main body in which a screw groove is formed on an inner peripheral surface of a small resin or metal cylindrical body. A plurality of tongue pieces that project away from the female screw body toward the rear are formed to protrude toward a position slightly behind the rear end of the female screw body from a portion where the circumferential direction in the vicinity is evenly divided, In addition, the same effect can be obtained even with an insert female screw characterized in that a projection or a thread is formed on the outer peripheral surface of each tongue piece.

The most significant feature of this configuration is that a female screw main body on which the male screw portion of the knob is screwed and a portion corresponding to the rear portion of the insert female screw having the above-mentioned notch are formed by a plurality of separate tongue pieces. On the point. Here, a further improvement is that the rear ends of the plurality of tongue pieces are slightly longer than the rear ends of the female screw body. By doing so, when the knob is turned and tightened strongly, the front end face of the knob contacts the rear end of the tongue piece, and the tongue piece spreads in the direction of biting into the inner wall of the hole in the plate surface, so that the insert female screw becomes difficult to pull out. is there.

In the insert female screw according to the above two constructions, if the protrusion formed on the outer peripheral wall of the female screw main body or the outer peripheral surface of the tongue piece is formed as a plurality of serrated strip protrusions, the resistance to pull-out is reduced. Is preferable because it is easy to bite into the inner wall of the hole on the plate surface.

In the insert female screw having each of these configurations, if the distal end portion of the female screw main body is formed to have a smaller diameter toward the distal end thereof, it becomes easier to insert the female screw body into a hole in the plate surface at the time of mounting.

The protrusions include all protrusions such as ones formed in each direction in the circumferential direction, a depressed protrusion, a diamond cut protrusion and the like. It refers to a spiral projection of a shape.

In each of these configurations, when the distal end portion of the female screw main body is formed into a shape in which the outer peripheral diameter is further reduced toward the distal end thereof, the work of press-fitting into the opening formed in the plate surface is facilitated. is there.

[0030]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The objects and effects of the present invention are as described above. Next, the specific structure of the insert female screw according to the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings.

FIG. 1A is a front view showing an insert female screw according to a first embodiment of the present invention, FIG. 1B is a left side view, FIG. 1C is a right side view, and FIG. ) Is a bottom view, and (e) is a front sectional view. FIG. 2 is a front cross-sectional view showing a process of using the insert female screw according to the first embodiment of the present invention, and FIG. 3 is a front cross-sectional view showing the same use state.

FIG. 4A is a front view showing an insert female screw according to a second embodiment of the present invention, FIG. 4B is a left side view, FIG. 4C is a right side view, and FIG. The figure is a front sectional view of the same. FIG. 5 is a front cross-sectional view showing an intermediate process of the use state of the insert female screw according to the second embodiment of the present invention, and FIG. 3 is a front cross-sectional view showing the use state similarly.

First, an insert female screw 12 according to a first embodiment of the present invention will be described with reference to FIGS.

Insert female screw 1 according to the first embodiment
2 is a female screw body 12 made of a small cylinder made of nylon resin.
A thread groove 12b is engraved on the inner peripheral surface of a, and five radially extending protrusions 12d are formed on the outer peripheral wall 12c of the female screw main body 12a in the axial direction. A slightly large-diameter flange surface 12e is formed at the rear end of the female screw main body 12a.
Divides the rear part of the female screw main body 12a vertically (axially) from the rear end edge 12r to the middle part 12p in the axial direction.
The cutouts 12g, 12g of the book are formed.

Each of the projections 12d is formed in a sawtooth shape having a large resistance to pulling out and easy to bite into an inner wall of a hole of a plate surface to be mounted. The inclination of each of the projections 12d is determined by an insert female screw. A slope is directed to the front end side 12f of 12 and the rear end side 12r is formed in an upright shape, that is, a shape that is easy to enter and hard to slip out.

The notches 12g, 12g are formed up to a point in the axial direction of the female screw main body 12a. The notches 12g, 12g extend from the intermediate point to the tip of the female screw body 12a so as to be continuous from the notches 12g, 12g. Groove 12h, 1
2h is formed so that the rear portion of the female screw main body 12a is easily expanded.

As shown in FIG. 2, the mounting method is as follows. First, a hole 2a is formed in a thick portion of the thick plate surface 2 so that the insert female screw 12 can be lightly pressed into the male screw portion 3a at the tip of the knob 3. Insert female screw 12 is screwed in until it comes into contact with flange surface 3 b of knob 3.

Subsequently, as shown in FIG. 3, the insert female screw 12 is lightly press-fitted into the hole 2a, and the knob 3 is turned by hand by about half a turn to complete the operation. In other words, it can be mounted almost with one touch.

By doing so, the insert female screw 12
When the notches 12g, 12g are provided, the sheet is pulled out of the hole in the plate surface by expanding or buckling in the direction of biting into the inner wall of the hole 2a of the plate surface 2 by contacting the pulling force and the flange surface 3b of the knob 3. It is difficult. In addition, since the pulling force is applied to the male screw portion 3a of the knob 3 and the contact pressure is also applied to the flange surface 3b of the knob 3, the knob 3 is maintained in a secure mounting state.

Further, since the male screw portion 3a of the knob 3 is securely screwed at least inside the distal end portion of the insert female screw 12, the mounting stability of the knob 3 is excellent and does not become gritty.

The insert female screw 13 according to the second embodiment of the present invention shown in each of FIGS. 4A and 4B is a female screw main body 13b in which a screw groove 13a is formed on the inner peripheral surface of a small cylinder made of nylon resin. A plurality of tongue pieces moving away from the female screw body 13b toward the rear from a position where the circumferential direction near the front end of the outer peripheral wall 13c is equally divided into a position slightly behind the rear end of the female screw body 13b. 13c ...
Are formed on the outer peripheral surface of each of the tongue pieces 13c.

The rear end of each of the projections 13d is formed slightly longer than the rear end of the female screw body 13b.

As shown in FIG. 5, the mounting method is as follows. First, a hole 2a is formed in a portion of the thick plate surface 2 where the mounting female screw 13 can be lightly press-fitted, while a knob is formed in the male screw portion 3a of the knob 3. Then, the insert female screw 12 is screwed in until it comes into contact with the flange surface 3b of the third.

Subsequently, as shown in FIG. 6, the insert female screw 12 is lightly press-fitted into the hole 2a, and the knob 3 is turned by hand by about a half turn to tighten it. In other words, it can be attached almost with one touch.

By doing so, the insert female screw 13
The rear end of the tongue portion 13c... Abuts against the flange surface 3b of the knob 3 to spread or buckle in the direction of biting into the inner wall of the hole 2a of the plate surface 2 so as to be buckled from the hole in the plate surface. It is extremely difficult to pull out. In addition, since the pulling force is applied to the male screw portion 3a of the knob 3 and the contact pressure is also applied to the flange surface 3b of the knob 3, the knob 3 is maintained in a secure mounting state.

[0046]

According to the insert female screw according to the present invention described above, the screw is screwed into the male screw portion of the knob, and in this state, the knob is held by hand and pressed into the hole in the plate surface as it is.
By operating the knob about a half turn, it became possible to attach it so easily that it could be called a touch. In addition, by the operation of about half a turn, the pulling force of the male screw portion of the knob and the contact of the knob with the flange surface push the front part of the insert female screw outward and spread the hole into the peripheral wall further. So,
The strength against detachment has increased in each step. Also, the pressure applied to the flange surface can prevent the knob from loosening.

[Brief description of the drawings]

FIG. 1 (a) is a front view showing an insert female screw according to a first embodiment of the present invention. (B) is a left side view similarly. (C) is a right side view of the same. (D)
The figure is a bottom view. (E) is a front sectional view of the same.

FIG. 2 is a front cross-sectional view showing an intermediate process of a use state of the insert female screw according to the first embodiment of the present invention.

FIG. 3 is a front sectional view showing a use state of the same.

FIG. 4A is a front view showing an insert female screw according to a second embodiment of the present invention. (B) is a left side view similarly. (C) is a right side view of the same. (D)
The figure is the same front sectional view.

FIG. 5 is a front cross-sectional view showing an intermediate process of a use state of an insert female screw according to a second embodiment of the present invention.

FIG. 6 is a front sectional view showing a use state of the same.

FIG. 7 (a) shows an insert female screw A according to the prior art.
It is the front view which showed and fractured partially. (B) is a right side view of the same.

FIG. 8 is a cross-sectional view showing the state of use.

FIG. 9A is a front view showing another type of insert female screw according to the related art, FIG. 9B is a left side view thereof, and FIG. 9C is a front sectional view thereof.

FIG. 10 is a sectional view showing the state of use.

FIG. 11 (a) is a front view showing another type of insert female screw according to the prior art, partially cut away, and FIG. 11 (b) is a right side view.

[Explanation of symbols]

 2 Plate surface 2a Hole 3 Knob 3a Male screw part 3b Flange surface 12 Insert female screw 12a Female screw body 12b Screw groove 12c Outer peripheral wall 12d Stripe protrusion 12e Flange surface 12f Front edge 12g Notch 12h Groove 12r Rear edge

Claims (4)

[Claims] 1. A female or metallic small cylindrical body having a thread groove formed on an inner peripheral surface thereof, wherein a female screw body has a projection or a thread formed on an outer peripheral wall thereof, and a rear end edge of the screw body. A plurality of cutouts are formed at a position extending from the center to an intermediate portion in the axial direction, and a plurality of cutouts are formed so as to equally vertically divide the relevant portion in the axial direction. 2. The internal thread body of the female screw main body is divided from a portion near the tip of the outer peripheral wall of the female screw main body in which a screw groove is engraved on the inner peripheral surface of the resin or metal small cylindrical body so as to equally divide the circumferential direction. A plurality of tongue pieces that project away from the female screw body toward the rear are formed so as to protrude toward a position slightly behind the rear end, and a projection or a thread is formed on the outer surface of each tongue piece. Insert female screw characterized by the following. 3. The insert female screw according to claim 1, wherein the protrusion formed on the outer peripheral wall of the female screw main body or the outer surface of the tongue piece is formed by a plurality of serrated strip protrusions. 4. The insert female screw according to claim 1, wherein the outer peripheral diameter of the distal end portion of the female screw main body is further narrowed down toward the distal end thereof.