JPH08121453A - Screw receiving tool - Google Patents

Abstract

PURPOSE: To provide a screw receiving tool capable of surely preventing conturing a metal-made nut by forming an insertion port of inserting the metal- made nut in an upper side of a storage part, so as to enable the metal-made nut to sink in the storage part. CONSTITUTION: In a metal-made nut 20 stored in a storage part 5, the nut 20 in the initial step is stored via an insertion port 6 into an upper side of the storage part 5, but thereafter the metal-made nut 20, by its own weight or by slightly screwing with a bolt 21, is displaced from the insertion port 6 to move downward in the storage part 5, and all the side surface of this port 6 comes into perfect contact, even when assumed partially, with an internal wall surface 5a of providing a hexagonal section of the storage part 5, to lock the metal-made nut. For instance, in a process of screwing the bolt 21, even when applied strong rotary torque to act, turning the metal-made nut 20 together with the bolt can be surely prevented, so as to perform the tightening work extremely improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a screw receiver used for screwing various mounting parts to a desired panel.

[0002]

2. Description of the Related Art As a conventional screw receiver of this type, for example, Japanese Utility Model Publication No. 63-39446 and Japanese Utility Model Publication No. 5-528.
There is the one shown in Japanese Patent No. 4 publication. Although these conventional screw receivers have some structural differences, they are basically composed of a synthetic resin base and two parts of a metal nut. It is formed into a horizontal U-shape having a pair of holding pieces and a connecting portion, and a through hole for inserting a bolt is bored in each central portion of the pair of holding pieces.
A cylindrical storage portion surrounding the through hole is integrally provided on one side of the holding piece, and an insertion port for inserting the metal nut is formed in a part of the storage portion.

Therefore, in actual use, a metal nut is inserted from the insertion opening into the housing to obtain a combined state of the synthetic resin base and the metal nut, and the base is vertically moved to the end of the panel. After mounting through the pair of holding pieces, align the part so that the through hole of the part is aligned with the through hole of the other holding piece, and from the through hole of the part, attach the tip of the bolt to each through hole and the panel. Through the through hole of one of the holding pieces, it is guided into the storage part that is connected to one of the holding pieces, and the metal nut stored in the storage part is screwed and tightened. It will be fixed with screws.

[0004]

However, in the conventional screw receiver, if the cross-sectional shape similar to the hexagonal shape of the metal nut is given to the inner wall surface of the accommodating portion, it will be a problem. Since the nut insertion opening that is completely cut open is formed in one corner of the storage portion, the nut stored in the storage portion has four side surfaces among its six side surfaces due to the existence of the insertion opening. Only the abutment is in contact with the inner wall surface of the housing, so if a strong torque is applied during the process of screwing the tip of the bolt and the nut, the metal nut will rotate together while prying the insertion opening. It had a big problem that it did. Among the above-mentioned conventional examples, the actual fairness 5-5
The one disclosed in Japanese Patent No. 284 has a pair of reinforcing guide walls projecting parallel to the insertion opening edge of the storage portion so as to prevent co-rotation of the metal nut, but even in this case, as a result, However, since only four side surfaces of the nut are in contact with the inner wall surface of the housing portion, it is not possible to completely prevent co-rotation of the metal nut.

Moreover, since the conventional screw receiver does not have the function of preventing the rotation of the bolt, if an unexpected external force such as vibration is applied to the bolt itself screwed with the metal nut. , There is a risk that the bolt will rotate carelessly and the tightened state with the nut will become loose, and the fixed state of the parts will become unstable, and the height dimension of the storage section will match the height of the metal nut and press-fitted. It cannot be denied that the work of inserting the nut into the storage part is naturally difficult because of the adoption of the configuration.

[0006]

The present invention was developed in order to effectively solve the problems faced by such conventional screw receivers. It is composed of two parts, a synthetic resin base and a metal nut. The resin base body has a horizontal U-shape having a pair of holding pieces, and a through hole is formed in each of the pair of holding pieces, and a cylindrical storage portion surrounding the through hole is connected to one holding piece side. As a premise of a screw receiver for accommodating a metal nut in the accommodating portion, the inner wall surface of the accommodating portion has a cross-sectional shape similar to the outer shape of the metal nut, and the height dimension in the accommodating portion is Longer than the height of the metal nut,
An insertion opening for inserting a metal nut is formed on the upper side of the storage unit to allow the sinking of the metal nut in the storage unit. Further, in this case, a ceiling hole having a diameter smaller than the diameter of the bolt screwed with the metal nut is bored on the upper wall surface of the storage portion, or the inner diameter of the storage portion is decreased from the upper side to the lower side. It is preferable to change it so that it becomes smaller.

[0007]

Therefore, also in the present invention, a metal nut is inserted from the insertion opening into the housing to obtain a combined state of the synthetic resin base and the metal nut, and the base is attached to the end of the panel. After mounting through the pair of holding pieces, align the part so that the through hole of the part is aligned with the through hole of the other holding piece, and from the through hole of the part, attach the tip of the bolt to each through hole and the panel. Through the through hole of one of the holding pieces, it is guided into the storage part that is connected to one of the holding pieces, and the metal nut stored in the storage part is screwed and tightened. It will be fixed with screws.

However, according to the present invention, even if the metal nut in the accommodating portion is accommodated on the upper side of the accommodating portion depending on the position where the insertion opening is formed in the initial stage, after that,
Due to its own weight or by screwing with a bolt, the metal nut shifts from the insertion port and sinks downward in the storage part, and its entire side surface abuts the inner wall surface of the storage part that resembles its own shape and locks completely. Therefore, even if a strong torque is applied during the screwing process with the bolt, it is possible to reliably prevent the metal nut from rotating together, as in the conventional case.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to an illustrated embodiment. A screw receiver according to this embodiment is basically the same as the conventional one, as shown in FIG. It is composed of two parts, a synthetic resin base 1 and a metal nut 20, and the synthetic resin base 1 has a horizontal U-shape having a pair of holding pieces 2A and 2B for elastically holding the end of the panel and a connecting portion 3. Through holes 4A and 4B, through which bolts are inserted, at substantially the center of each of the holding pieces 2A and 2B, and a cylindrical storage portion 5 surrounding the through hole 4A is provided on the side of one holding piece 2A. Although it is premised that the metal nut 20 is housed in the housing portion 5 in a continuous manner, the feature is that the following configuration is adopted.

That is, in the present embodiment, FIGS.
As also shown in FIG. 1, first, the inner wall surface 5a of the cylindrical storage portion 5 is
Has a hexagonal cross section similar to the outer shape of the metal nut 20, and the height dimension L1 in the storage portion 5 is set to the metal nut 2
The height of the metal nut 20 is set to be longer than the height L2 of 0, and the insertion hole 6 for inserting the metal nut 20 is formed on the upper side of the long storage portion 5 to sink the metal nut 20 in the storage portion 5. This is a structure that allows for positive inclusion. More specifically, when the above-described height dimension L1 is given to the storage part 5, as shown in the drawing, an insertion opening 6 larger than the metal nut 20 is provided on the upper side of one side of the storage part 5. On the other hand, on the other hand, on the lower side of the other side of the storage part 5, a die-cutting port 7 shorter than the height L2 of the metal nut 20 is formed, and one from the die-cutting port 7 side to the inside of the storage part 5 is formed. Holding piece 2
The concave groove 8 for receiving the metal nut 20 is positively formed on the upper surface of A.

Therefore, when the metal nut 20 is inserted into the storage portion 5 through the upper insertion port 6, the metal nut 20 is temporarily stored in the upper portion of the long storage portion 5. However, if the weight of the metal nut 20 acts under such a condition or if the metal nut 20 is screwed into the tip of a bolt to be described later, the metal nut 20 is immediately displaced from the insertion port 6 and the storage portion. Since the inside of 5 is moved downward and all of its 6 side surfaces are brought into contact with the inner wall surface 5a of the storage portion 5 having the above-described hexagonal cross section, a strong rotational torque is generated in the process of screwing with the bolt. Even if it works, the metal nut 20 can be prevented from rotating together. In the present embodiment, the die-cutting opening 7 is formed on the lower side of the other side of the storage portion 5, but the die-cutting opening 7 is smaller than the height L2 of the metal nut 20. Since the dimensions are set, the upper edge side of the die-cutting opening 7 always contacts the metal nut 20 under any circumstances, and the contact state with all the side surfaces is applied.

Also in this embodiment, the ceiling hole 9 through which the tip of the bolt is inserted is formed on the upper wall surface of the cylindrical housing portion 5. The ceiling hole 9 has a diameter of the bolt. When the tip of the bolt passes through the ceiling hole 9 with a diameter slightly smaller than that of the bolt, by forcibly passing it while tapping, an unexpected external force such as vibration is applied to the bolt itself when the parts are screwed. Even if the bolt is carelessly rotated and the fastening state with the metal nut 20 is loosened, it is possible to prevent the fixed state of the parts from becoming unstable. In the figure, 10 is a stopper projection formed on the lower surface of the tip of the upper wall surface of the storage part 5 to prevent the metal nut 20 from coming off the insertion port 6, and 11 is the other holding piece 2B. The taper-shaped locking projections formed on the edge of the through hole 4B are used to lock the synthetic resin substrate 1 by locking the through holes formed on the panel side.

Therefore, by using the screw receiver having such a structure,
When various components P2 are fixed to the panel P1 side by screws, as in the conventional case, first, as shown in FIG. 5, a metal nut 20 is inserted from the insertion opening 6 into the storage portion 5 to synthesize them. Obtaining a combined state of the resin base 1 and the metal nut 20,
The base body 1 is provided on the end side of the panel P1 with a pair of upper and lower holding pieces 2A.
・ Install using the elastic holding force of 2B. In this case, in this embodiment, as described above, since the height dimension L1 in the storage portion 5 is long, the insertion opening 6 is made as large as possible and made of metal. While the insertion work of the nut 20 can be performed very well, the tapered locking projection 11 described above is automatically locked in the through hole H1 of the panel P1, and the through hole H1 of the panel P1 and each holding piece 2A.・ 2B through hole 4A
4B can be matched, and at the same time, a reliable attachment state of the synthetic resin substrate 1 to the end of the panel P1 can be guaranteed.
Further, even if the insertion port 6 is large, the presence of the stopper protrusion 10 causes the metal nut 20 to pass through the insertion port 6.
There is no worry that it will come off.

Therefore, this time, as shown in FIG.
2 so that the through hole H2 of its own coincides with the through hole 4B of the other holding piece 2B, and the tip 21a of the bolt 21 from the through hole H2 of the component P2 to the through holes 4A and 4B and the panel P1. If it is guided through the through hole H1 into the storage portion 5 that is connected to one of the holding pieces 2A and screwed into the metal nut 20 stored in the storage portion 5 and tightened, The component P2 is fixed to the panel P1. However, according to the present embodiment, the following advantages are obtained because the configuration described above for the storage unit 5 is adopted. Will be obtained.

That is, even if the metal nut 20 accommodated in the accommodating portion 5 is accommodated in the upper part of the long accommodating portion 5 through the insertion port 6 in the initial stage, thereafter, it is caused by its own weight. Alternatively, the metal nut 20 is displaced from the insertion opening 6 and moved downward in the storage portion 5 by a slight screwing with the bolt 21, and all six side surfaces of the inner wall surface 5a of the storage portion 5 have a hexagonal cross section. Even if it is partial, it will be completely abutted and locked, so even if a strong rotational torque acts in the process of screwing with the bolt 21, the metal nut 20
Since it is possible to reliably prevent the co-rotation, the tightening work can be performed satisfactorily.

Further, in the fixed state of the component P2, even if an unexpected external force such as vibration is applied to the bolt 21 itself, the bolt 21 is locked in the ceiling hole 9 while tapping, so that the conventional bolt As described above, it is also possible to prevent the bolt 21 from rotating carelessly and loosening the fastening state with the metal nut 20 to make the fixed state of the component P2 unstable. Further, in the present embodiment, in order to obtain the height dimension L1 in the storage portion 5, the holding groove 2 is formed in one holding piece 2A. While maintaining the required rigidity of the piece 2A, it is possible to effectively prevent the settling due to its thermal history, and the thin-walled structure of the other holding piece 2B also acts in the same manner.

In the above embodiment, the inner diameter of the storage portion 5 is the same in the vertical direction, but the present invention is not limited to this, and for example, in FIG. A
, The inner wall surface 5a is gradually tapered so as to have a smaller diameter, or
As shown in B of the same figure, the upper side is also changed in the same tapered shape, but it is also optional to set the wall surface of the lower side only where the metal nut 20 is completely depressed to be vertical depending on the implementation. . In particular, if any one of these configurations is adopted, it is possible to more positively promote the sinking of the metal nut 20 in the storage portion 5 while effectively absorbing the dimensional variation of the both 5 and 20. It will be.

[0018]

As described above, according to the present invention, even if the metal nut housed in the housing portion is housed in the upper portion of the housing portion from the insertion opening in the initial stage, after that,
It should be completely locked by slipping downward from the insertion opening due to its own weight or by screwing with a bolt and sinking downward in the storage part, and contacting all six side surfaces with the inner wall surface of the storage part that resembles its own external shape. Therefore, even if a strong torque is applied during the screwing process with the bolt, it is possible to reliably prevent the metal nut from rotating together.

Further, if the ceiling hole is set to have a diameter smaller than the diameter of the bolt, even if an unexpected external force such as vibration is applied to the bolt itself, the bolt is locked while tapping into the ceiling hole. It is also possible to prevent the fixing state of the parts from becoming unstable at once, as the bolt rotates and the fastening state with the nut loosens as in the conventional case. Furthermore, by changing the inner diameter of the storage part so that it becomes smaller from the upper side to the lower side, it is possible to more effectively promote the sinking of the metal nut in the storage part while effectively absorbing dimensional variations. It also means to let.

[Brief description of drawings]

FIG. 1 is a perspective view showing a screw receiver according to an embodiment of the present invention in a disassembled state from one direction.

FIG. 2 is a perspective view showing only a synthetic resin base from another direction.

3A is a sectional view taken along the line AA of FIG. 1, and FIG. 3B is FIG.
FIG. 6 is a sectional view taken along line BB of FIG.

FIG. 4 is a cross-sectional view of a synthetic resin base.

5A is a cross-sectional view showing a state where a metal nut is stored in a storage portion of a synthetic resin base body, and FIG. 5B is a main-portion cross-sectional view showing a state where the base body is attached to an end portion of a panel. is there.

6A is a sectional view of a main part showing a state in which a component is screwed and fixed to a panel, and FIG. 6B is a sectional view taken along line CC of FIG. 6A.

7A and 7B are cross-sectional views of a main part showing another example of the storage part side.

[Explanation of symbols]

 1 Synthetic resin base 2A One holding piece 2B The other holding piece 4A Through hole 4B Through hole 5 Storage part 5a Same inner wall surface 6 Insertion port 9 Ceiling hole 20 Metal nut 21 Bolt P1 Panel H1 Same hole P2 Part H2 Same Through hole L1 Height of storage part L2 Height of metal nut

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akito Akasaki 10-1 Amanuma, Hiratsuka City, Kanagawa Nissan Shatai Co., Ltd. (72) Inventor Shinji Ando 10-1 Amanuma, Hiratsuka, Kanagawa Nissan Shatai Co., Ltd. In the company

Claims (3)

[Claims] 1. A synthetic resin substrate and a metal nut, each of which has two parts. The synthetic resin substrate has a horizontal U shape having a pair of holding pieces, and a through hole is formed in each of the pair of holding pieces. In addition, in a screw receiver for accommodating a metal nut inside the accommodating portion, a tubular accommodating portion surrounding the through hole is continuously provided on one side of the holding piece, and the inner wall surface of the accommodating portion is made of metal nuts. In addition to having a cross-sectional shape similar to the external shape, the height dimension inside the storage part is set to be longer than the height of the metal nut,
A screw receiver characterized in that an insertion port for inserting a metal nut is formed on an upper side of the storage part so that the sinking of the metal nut in the storage part is allowed. 2. The screw receiver according to claim 1, wherein a ceiling hole having a diameter smaller than a diameter of a bolt screwed with the metal nut is bored on the upper wall surface of the housing portion. 3. The screw receiver according to claim 1 or 2, wherein the inner diameter of the housing portion is changed so as to become smaller from the upper side to the lower side.