JPH11117633A - Screwing device and method for fitting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve screwing while making the head of an externally threaded part inconspicuous, without providing a recess part for storing the head of the externally threaded part in advance, and to obtain the required strength. SOLUTION: This screwing device for a fitting includes an externally threaded part 3, a fitting member 1 provided with a through hole 11 through which the externally threaded part 3 is passed, and a back plate 2 provided with an internally threaded part 21 with which the externally threaded part 3 is engaged, the screwing device screwing the back plate 2 to the fitting member 1. In this case, the externally threaded part 3 has a conical head seat surface 31a harder than the fitting member 1, and the through hole 11 has a minor diameter L' smaller than the head diameter L of the externally threaded pat 3, with the head 31 of the externally threaded part 31 driven into the through hole 11 by an axial force produced when the externally threaded part 3 is engaged with the internally threaded part 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screwing device and a screwing method for a fitting for fastening a back plate to a fitting such as a frame.

[0002]

2. Description of the Related Art Generally, a back plate for attaching a door check is screwed to an upper frame or a vertical frame on a hanging side of a door. The door check has one end supported on the frame side and the other end supported on the door frame side, and is attached so as to automatically return the opened door to a predetermined stationary position.

[0003] Screwing of the back plate is performed by screwing a screw inserted through a through hole provided in the frame into a female screw portion provided in the back plate.

[0004] In addition, a recess for accommodating the head of the screw is provided at the end of the through hole on the side where the screw is inserted so that the head of the screw is not noticeable. For example, after drilling the through-hole, dish milling is performed using a drilling machine or the like to chamfer the edge of the end of the through-hole.

[0005]

By the way, as described above, providing the recess for accommodating the head of the screw requires more steps and dedicated machine tools. The cause is increasing.

Therefore, according to the present invention, the screw head can be screwed so that the head of the male screw component is inconspicuous and the required strength can be obtained without providing a recess for accommodating the head of the male screw component in advance. An object of the present invention is to provide a screwing device and a screwing method for a fitting.

[0007]

According to a first aspect of the present invention, there is provided a male screw part, a fitting member provided with a through hole for inserting the male screw part, and a female screw part for screwing the male screw part. A backing plate, wherein the male screw component has a conical head seat surface that is harder than the fitting member, and the through hole Has a minor diameter smaller than the head diameter of the male screw part, and has a configuration in which the head of the male screw part is immersed in the through hole by an axial force when the male screw part is screwed into the female screw part. It is a screwing device for fittings.

As described above, according to the present invention, the male screw part has a conical head seat surface that is harder than the fitting member, and the through hole has a minor diameter smaller than the head diameter of the male screw part. By the axial force when screwing the male screw part into the female screw part, the short diameter part of the through hole can be gradually crushed and crushed on the head seat surface of the male screw part, and the head of the male screw part immerses into the hole can do. Therefore, the head of the male screw part
It can be made inconspicuous with respect to the surface of the fitting member.

In the prior art, in particular, a recess for accommodating the head of the male screw component is provided at the end of the through hole on the side where the male screw component is inserted, but in the present invention, the male screw component can be provided without such a recess. Head can be immersed in the hole, so the step of providing a recess and machine tools can be omitted,
As a result, the manufacturing cost of the fitting can be reduced.

Further, as the through hole is crushed and crushed, the lower edge may protrude toward the center. In this case, the pressure contact surface with the head seat surface can be increased, and the effect of screwing can be reduced. It can be further improved.

According to a second aspect of the present invention, in the first aspect, the through hole has a polygonal shape inscribed in a circle having a diameter equal to or substantially equal to a head diameter of the male screw part. It is a screwing device for fittings.

As described above, according to the present invention, the through hole has a polygonal shape inscribed in a circle having a diameter equal to or substantially equal to the head diameter of the male screw part. The diameter portion can be set in a well-balanced manner, and a good screwing condition can be obtained.

In particular, when the polygon is a regular polygon having about 6 to 10 corners, the male screw part can be more easily tightened and the screwing strength can be sufficiently secured.

According to a third aspect of the present invention, in the first or second aspect, the through hole is a screwing device for a fitting having a structure provided by press molding.

As described above, according to the present invention, since the through holes are formed by press molding, the through holes having a predetermined shape can be accurately and easily provided.

That is, if the through hole has a complicated shape, it is extremely difficult to form the through hole with a drill such as a drilling machine.

Further, when a plurality of through holes are provided in the fitting member, they can be provided collectively by a single pressing operation, and the process can be simplified.

The invention described in claim 4 of the present application is the invention according to any one of claims 1 to 3, wherein the fitting member is
A frame made of an extruded aluminum alloy, wherein the back plate is a screw fixing device for a fitting having a configuration for door check attachment.

As described above, according to the present invention, since the fitting member is made of an extruded aluminum alloy, a male screw component having a head seat surface harder than the fitting member is generally used for such fittings. Stainless steel or iron used in the above can be used.

Further, according to this configuration, sufficient supporting strength can be obtained, and the door check can be attached by screwing the back plate for attaching the door check.

According to a fifth aspect of the present invention, there is provided a male screw part, a fitting member provided with a through hole for inserting the male screw part, and a back plate provided with a female screw part for screwing the male screw part. A screwing device for a fitting that screws the back plate to the fitting member, wherein the male screw part has a conical head seat surface that is harder than the fitting member, and the through hole is formed of the male screw part. It has a minor diameter smaller than the head diameter, and the axial force when screwing the male screw part into the female screw part causes the head part of the male screw part to be immersed in the through hole. is there.

As described above, according to the present invention, the male screw component has a conical head seat surface that is harder than the fitting member, and the through hole has a minor diameter smaller than the head diameter of the male screw component. By the axial force when screwing the male screw part into the female screw part, the short-diameter part of the through hole can be gradually crushed and crushed on the head seat surface of the male screw part, and the head of the male screw part enters the through hole. can do. Therefore, the head of the male screw part
It can be made inconspicuous with respect to the surface of the fitting member.

In the prior art, in particular, a recess for accommodating the head of the male screw component is provided at the end of the through hole on the side into which the male screw component is inserted, but in the present invention, the male screw component can be provided without providing such a recess. Head can be immersed in the hole, so the step of providing a recess and machine tools can be omitted,
As a result, the manufacturing cost of the fitting can be reduced.

[0024]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows a screw fixing device in the fitting of this embodiment.
As shown in FIG. 2 to FIG. 2, the back plate 2 is screwed to the fitting member 1 with the male screw part 3, and the male screw part 3 is inserted into the through hole 11 provided in the fitting member 1, It is configured to be screwed into the female screw portion 21 provided on the back plate 2.

The fitting member 1 of the present embodiment is an upper frame of an entrance door formed by extruding an aluminum alloy and subjecting it to appropriate processing, and is provided above a door body (not shown). The back plate 2 of the present embodiment is a steel plate to which a door check of the entrance door is attached, and is configured to support one end of the door check.

The male screw part 3 has a head 31 formed of a dish-shaped stainless steel small screw and a conical head seat surface 31a.
Having. At the top of the head 31, there is provided a slot 31b for screwdriver insertion.

The through hole 11 has a short diameter L 'smaller than the head diameter L of the male screw part 3, and in this embodiment, is formed by press forming. As shown in FIGS. 3A and 3B, the through hole 11 has a circle having a diameter equal to or substantially equal to the head diameter L of the male screw part 3 (indicated by a chain line in FIG. Shown in the figure).

According to this configuration, the male screw part 3 inserted into the through hole 11 is screwed into the female screw part 21 and tightened, so that the head 31 of the male screw part 3 is inserted into the through hole 11 as shown in FIG. Immerse yourself. That is, the head seat surface 31a
Is harder and more conical than the fitting member 1, the axial force (tensile force acting in the axial direction of the male screw part) when the male screw part 3 is screwed into the female screw part 21 causes the short diameter L of the through hole 11 to be small. 'Part is gradually crushed, and the head 3 of the male screw part 3 is
1 is immersed in the through hole 11 so as to be inconspicuous with respect to the surface of the fitting 1. The head seat surface 31a is pressed against the crushed portion of the through-hole 11, and the fitting member 1 is fixed to the head seat surface 3
1a and the back plate 2.

Here, if the number of polygons of the through hole 11 is too large, the pressure contact surface between the head seat surface 31a and the fitting member 1 becomes narrow, so that the head 31 comes out of the through hole 11. There is a fear. Conversely, if the number of corners is too small, the minor axis L 'becomes too short, and it becomes difficult to crush the portion of the through-hole 11 at the minor axis L'. In addition, if the difference in the length of each side of the polygon is large, the equilibrium state between the head seat surface 31a and the through hole 11 deteriorates. Therefore, this polygon is desirably a regular polygon having about 6 to 10 corners. In this regard, in the case of this example, the through hole 1
Reference numeral 1 denotes a regular octagon, which is configured so that the male screw part 3 can be more easily tightened and the screwing strength is sufficiently ensured.

As shown in FIG. 5, the lower edge of the through hole 11 may protrude toward the center as it is crushed. In this case, the pressure contact surface with the head seat surface 31a is increased, which contributes to the effect of screwing.

In this embodiment, a plurality of such screwing devices are provided for the fitting member 1, and the respective through holes 11 are provided collectively by a single pressing operation. Thus, the step of providing the through-hole may be labor-saving.

The back plate 2 is not limited to a flat plate.
It may be one side wall of the case.

In addition to the door check, the back plate 2
You may comprise so that the hinge etc. for opening and closing a front door may be supported. Further, in this case, the back plate 2 may be configured to be welded to the fitting member 1 after being screwed.

As described above, according to this embodiment, the male screw part has a conical head seat surface that is harder than the fitting member, and the through hole has a shorter diameter smaller than the head diameter of the male screw part. Therefore, the axial force generated when the male screw part is screwed into the female screw part can gradually crush the short-diameter portion of the through-hole on the head seat surface of the male screw part, and the head of the male screw part can be inserted into the through-hole. You can be immersed in. Therefore, the head of the male screw component can be made inconspicuous with respect to the surface of the fitting member.

Particularly, in the prior art, a recess for accommodating the head of the male screw component is provided at the end of the through hole on the side into which the male screw component is inserted, but in this example, such a recess is not required.
Since the head of the male screw component can be immersed in the hole, the step of providing the concave portion and the machine tool can be omitted, and the manufacturing cost of the fitting can be reduced.

Also, as the through hole is crushed, the lower edge may protrude toward the center as it is crushed. In this case, the pressure contact surface with the head seat surface can be increased, and the effect of screwing can be reduced. It can be further improved.

According to this embodiment, the through hole has a polygonal shape inscribed in a circle having a diameter equal to or substantially equal to the head diameter of the male screw part. The parts can be set in a well-balanced manner, and a good screwing condition can be obtained.

In particular, when the polygon is a regular polygon having about 6 to 10 corners, the male screw part can be more easily tightened and the screwing strength can be sufficiently secured.

Further, according to the present embodiment, since the through holes are provided by press molding, the through holes having a predetermined shape can be provided accurately and easily.

That is, if the shape of the through hole is complicated, it is extremely difficult to form the hole with a drill such as a drilling machine.

When a plurality of through holes are provided in a fitting member, they can be provided collectively by a single pressing operation, and the process can be simplified.

Also, according to this embodiment, since the fitting member is made of an extruded aluminum alloy, it is generally used for such a fitting as a male screw part having a head seat surface harder than the fitting member. It is possible to use those made of stainless steel or iron.

Further, according to this configuration, a sufficient supporting strength can be obtained, so that the door check can be attached by screwing the back plate for attaching the door check.

[0045]

According to the first aspect of the present invention, there is provided a fitting member provided with a male screw part, a through hole for inserting the male screw part, and a back plate provided with a female screw part for screwing the male screw part. Comprising, in the screw device in the fixture for screwing the back plate to the fitting member, the male screw component,
Along with having a conical head seat surface that is harder than the fitting member, the through-hole has a shorter diameter than the head diameter of the male screw part, and is used when screwing the male screw part into the female screw part. A screw fixing device for a fitting having a configuration in which a head of the male screw component is immersed in the through hole by an axial force.

As described above, according to the present invention, the male screw part has a conical head seat surface that is harder than the fitting member, and the through hole has a shorter diameter than the head diameter of the male screw part. By the axial force when screwing the male screw part into the female screw part, the short-diameter part of the through hole can be gradually crushed and crushed on the head seat surface of the male screw part, and the head of the male screw part enters the through hole. can do. Therefore, the head of the male screw part
It can be made inconspicuous with respect to the surface of the fitting member.

In the prior art, in particular, a recess for accommodating the head of the male screw component is provided at the end of the through hole on the side where the male screw component is inserted. However, in the present invention, the male screw component can be provided without providing such a recess. Head can be immersed in the hole, so the step of providing a recess and machine tools can be omitted,
As a result, the manufacturing cost of the fitting can be reduced.

Also, as the through hole is crushed, the lower edge may protrude toward the center in this case. In this case, the pressure contact surface with the head seat surface can be increased, and the effect of screwing can be reduced. It can be further improved.

According to a second aspect of the present invention, in the first aspect, the through hole has a polygonal shape inscribed in a circle having a diameter equal to or substantially equal to a head diameter of the male screw part. It is a screwing device for fittings.

As described above, according to the present invention, the through hole has a polygonal shape inscribed in a circle having a diameter equal to or substantially equal to the head diameter of the male screw part. The diameter portion can be set in a well-balanced manner, and a good screwing condition can be obtained.

In particular, when this polygon is a regular polygon having a number of angles of about 6 to 10, the male screw part can be more easily tightened and the screwing strength can be sufficiently secured.

According to a third aspect of the present invention, in the first or second aspect, the through hole is a screwing device for a fitting having a structure provided by press molding.

As described above, according to the present invention, since the through holes are provided by press molding, through holes having a predetermined shape can be provided accurately and easily.

That is, if the through hole has a complicated shape, it is extremely difficult to form the through hole with a drill such as a drilling machine. However, providing such a hole by press forming can solve such a problem.

Further, when a plurality of through holes are provided in the fitting member, they can be provided collectively by a single pressing operation, and the process can be simplified.

The invention described in claim 4 of the present application is the invention according to any one of claims 1 to 3, wherein the fitting member is
A frame made of an extruded aluminum alloy, wherein the back plate is a screw fixing device for a fitting having a configuration for door check attachment.

As described above, according to the present invention, since the fitting member is made of an extruded aluminum alloy, a male screw component having a head seat surface harder than the fitting member is generally used for such fittings. Stainless steel or iron used in the above can be used.

Further, according to this configuration, a sufficient supporting strength can be obtained, and the door check can be attached by screwing the back plate for attaching the door check.

According to a fifth aspect of the present invention, there is provided a male screw part, a fitting member provided with a through hole for inserting the male screw part, and a back plate provided with a female screw part for screwing the male screw part. A screwing device for a fitting that screws the back plate to the fitting member, wherein the male screw part has a conical head seat surface that is harder than the fitting member, and the through hole is formed of the male screw part. It has a minor diameter smaller than the head diameter, and the axial force when screwing the male screw part into the female screw part causes the head part of the male screw part to be immersed in the through hole. is there.

As described above, according to the present invention, the male screw part has a conical head seat surface that is harder than the fitting member, and the through hole has a minor diameter smaller than the head diameter of the male screw part. By the axial force when screwing the male screw part into the female screw part, the short-diameter part of the through hole can be gradually crushed and crushed on the head seat surface of the male screw part, and the head of the male screw part enters the through hole. can do. Therefore, the head of the male screw part
It can be made inconspicuous with respect to the surface of the fitting member.

In the prior art, in particular, a recess for accommodating the head of the male screw component is provided at the end of the through hole on the side into which the male screw component is inserted, but in the present invention, the male screw component can be provided without such a recess. Head can be immersed in the hole, so the step of providing a recess and machine tools can be omitted,
As a result, the manufacturing cost of the fitting can be reduced.

[Brief description of the drawings]

FIG. 1A is a front view showing a fitting member and a back plate, and FIG. 1B is a side view showing a fitting member and a back plate according to a specific example of the present invention.

FIG. 2 is an external view showing a screw fixing device in a fitting according to a specific example of the present invention.

3A is a top view showing a male screw part, and FIG. 3B is a top view showing a through hole according to a specific example of the present invention.

FIG. 4 is a side sectional view showing a state where a back plate is screwed to a fitting member according to a specific example of the present invention.

FIG. 5 is a top view showing through holes according to a specific example of the present invention.

[Description of sign]

 DESCRIPTION OF SYMBOLS 1 Fitting member 2 Back plate 3 Male screw part 11 Through-hole 21 Female screw part 31 Head 31a Head seating surface 31b Sliding L Head diameter L 'Short diameter of through-hole

Claims (5)

[Claims] An external thread part, a fitting member provided with a through hole through which the external thread part is inserted, and a back plate provided with a female screw part into which the external thread part is screwed, wherein the back plate is attached to the fitting member. In the screwing device for a fitting to be screwed, the male screw part has a conical head seat surface that is harder than the fitting member, and the through hole has a minor diameter smaller than the head diameter of the male screw part. A screwing device for a fitting, wherein a head of the male screw part is immersed in the through hole by an axial force when the male screw part is screwed into the female screw part. 2. The screwing device according to claim 1, wherein the through hole has a polygonal shape inscribed in a circle having a diameter equal to or substantially equal to a head diameter of the male screw part. 3. The screw device according to claim 1, wherein the through hole is formed by press molding. 4. The fitting member according to claim 1, wherein the fitting member is an extruded aluminum alloy frame, and the back plate is used for door check attachment. Screwing device for fittings. 5. A fitting member provided with a male screw part, a through hole for inserting the male screw part, and a back plate provided with a female screw part for screwing the male screw part, wherein the back plate is attached to the fitting member. In the screwing device for a fitting to be screwed, the male screw part has a conical head seat surface that is harder than the fitting member, and the through hole has a minor diameter smaller than the head diameter of the male screw part. A screwing method for a fitting, wherein a head of the male screw component is immersed in the through hole by an axial force when the male screw component is screwed into the female screw portion.