JP3435373B2 - Extruded profiles with screw holes - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extruded profile formed by extruding a metal such as aluminum or a resin, and more particularly to an extruded profile having a screw hole.

[0002]

BACKGROUND ART A sash and a door frame member formed of an extruded aluminum material, a door frame member, and the like are integrally formed with screw holes used for connecting the frame members and the frame members. As this screw hole, those disclosed in Japanese Patent No. 2811419 and Japanese Patent Laid-Open No. 9-151673 are known. The conventional screw holes described in these documents have a shape in which a plurality of recesses are formed on the inner peripheral surface thereof and a screw such as a tapping screw is easily screwed in.

By the way, in the conventional screw hole, the depths of the respective recesses are the same, and specifically, the size is the same as the outer circumference when the screw is screwed in, that is, the size from the center of the screw hole to the bottom of the recess. Was designed to have the same dimension from the central axis of the screw to its outer peripheral surface.

[0004]

However, if the depth of the recess is formed so as to be aligned with the outer circumference of the screw, cutting chips when the screw is screwed are caught between the screw and the recess, and the screwing torque is increased. However, there is a problem that a large stress is applied to the screw hole portion by the cutting waste and the screw hole is deformed, and the opening groove side is opened.

An object of the present invention is to provide an extruded profile with a screw hole which can easily discharge cutting chips when screwing in a screw and can prevent the screw holes from being deformed due to a large stress applied to the screw holes. .

Further, the screw hole portion is connected through a rib as a part of the extruded shape member and integrally formed. Therefore, in the conventional screw hole, since the depth dimension of each recess is the same, the wall thickness of the other recesses becomes smaller than the wall thickness of the recess formed in the portion connected to the rib, There is also a problem that stress concentrates on the concave portion and the portion is easily distorted or deformed.

A second object of the present invention is to provide an extruded profile with a screw hole which can alleviate stress concentration and prevent partial distortion and deformation.

[0008]

In the extruded profile with screw holes of the present invention, a screw hole portion having a screw hole formed on the inner peripheral surface is integrally molded, and an opening groove formed in the screw hole portion from the center position of the screw hole is formed. Proximal recesses are formed in at least two locations on the inner peripheral surface of the screw hole in the proximal end region that is the opposing proximal end side, and the dimension from the center position of the screw hole to the bottom of the proximal end recess is the same. It is made larger than the dimension from the center of the screw to the outer periphery , and the base end side recess is the center of the screw hole.
Symmetrical with respect to the direction of the center line connecting the position and the center of the opening groove
Position at 30-40 degrees to the centerline direction
It is characterized in that it is composed of two recesses formed in each case.

At least two base end side recesses are formed in the base end side region of the screw hole, and the dimension from the center position of the screw hole to the bottom of the base end side recess is measured from the center of the screw screwed into the screw hole to the outer peripheral portion. Therefore, when the screw is screwed into the screw hole portion, a groove continuous with the screw hole in the longitudinal direction of the screw hole is provided outside the screw by the base end side concave portion. For this reason, the cutting waste generated when screwing in can be easily discharged through the recess on the proximal end side, the cutting waste does not get caught between the screw and the screw hole, and the stress generated by the cutting waste adds stress to the screw hole. It is also possible to prevent the parts from being deformed. In particular, the cutting chips generated in the area part on the opening groove side can be easily discharged from the opening groove part, but it is difficult to move the cutting chips generated in the area on the base end side to the opening groove part, and to discharge them. Such cutting chips were often caught between the screw holes and the screws. However, according to the present invention, since the recesses are formed at least at two positions in the base end side region, the cutting waste generated in the base end side region can be easily and effectively discharged to the outside.

Further, since the base end side concave portion is formed at least at two places, it is possible to disperse the portion to which stress is applied due to thin wall thickness and to reduce deformation of the screw hole portion due to stress concentration. it can. In particular, the rigidity is higher on the base end side than on the opening side where the opening groove is formed, but by forming a recess on the base end side, the variation in rigidity at each part of the screw hole part is reduced, and the rigidity of the screw hole part is reduced. The whole can support stress. Therefore, it is possible to prevent distortion and deformation of the screw hole portion due to stress concentration.

At this time, opening side recesses are formed at least at two positions on the inner peripheral surface of the screw hole in the opening side region which is the opening groove side formed in the screw hole portion from the center position of the screw hole, and from the center position of the screw hole. The dimension from the center of the screw hole to the bottom of the base-side recess is smaller than the dimension of the opening-side recess from the center of the screw hole.
At a symmetrical position with respect to the center line connecting the center of
Formed at positions of 75 to 85 degrees with respect to the center line direction
It is preferable that the two concave portions are formed .

If the opening-side recess is formed in the opening-side region, especially when the screw-hole portion is made relatively thin, the base-end-side recess is formed so that the thick portion is smaller than other screw-hole portions. It may become In such a case, by forming the opening-side recess to bring the thick-walled portion closer to the base-end-side recess, the thin-walled portion having low rigidity is dispersed at least at four or more locations of each recess. Therefore, the stress can be dispersed, and the distortion and deformation of the screw hole can be prevented. Furthermore, if each recess is formed within the above angle range, each recess
It is possible to arrange the recesses on the inner peripheral surface of the screw hole in a well-balanced manner.
Yes, the screw holes are not
Place the engaging parts evenly in the screw holes.
It is possible to suppress the torque when screwing in to a relatively small value
While, the joint strength by the screw can be increased and the joint
It can be a screw hole with excellent workability and performance.
It

Further, it is preferable that the dimension from the center position of the screw hole to the bottom portion of the opening side recess is equal to the dimension from the center of the screw screwed into the screw hole to the outer peripheral portion. With this setting, the area of the engaging portion with which the screw is engaged in the screw hole can be appropriately adjusted.

Further, it is desirable that the base end side concave portion and the opening side concave portion have the same wall thickness, and the wall thickness is minimum in the screw hole portion.
If the thicknesses of the base end side concave portion and the opening side concave portion are made equal and the minimum thickness is provided in the screw hole portion, the portion having a small thickness and low rigidity is dispersed in at least four places of each concave portion in the screw hole portion. Therefore, the stress can be dispersed,
It is possible to prevent distortion and deformation of screw holes.

The extruded profile with screw holes of the present invention has an inner periphery
The screw hole part with the screw hole formed on the surface is integrally molded.
Formed in the screw hole part from the center position of the screw hole
In the base end side region which is the base end side opposite to the formed opening groove.
At least two locations on the inner peripheral surface of the screw hole
Is formed, and the screw hole is formed from the center position of the screw hole.
In the opening side area, which is the opening groove side formed in the
Open-side recesses are formed in at least two locations on the inner surface of the hole.
From the central position of the screw hole to the base end side recessed portion.
The dimensions to the bottom are the screws screwed into this screw hole.
Is larger than the size from the center of the
Dimension from the center of the shole to the bottom of the recess on the opening side
The method is from the center position of the screw hole to the base end side recess
It is smaller than the size to the bottom, and this screw hole
Equal to the dimension from the center of the screw that is screwed into
It may be characterized by something.

The extruded profile with screw holes of the present invention has an inner circumference
The screw hole part with the screw hole formed on the surface is integrally molded.
Formed in the screw hole part from the center position of the screw hole
In the base end side region which is the base end side opposite to the formed opening groove.
At least two locations on the inner peripheral surface of the screw hole
Is formed, and the screw hole is formed from the center position of the screw hole.
In the opening side area, which is the opening groove side formed in the
Open-side recesses are formed in at least two locations on the inner surface of the hole.
From the central position of the screw hole to the base end side recessed portion.
The dimensions to the bottom are the screws screwed into this screw hole.
It is larger than the size from the center of the
The thickness of the base end side concave part and the opening side concave part is equal.
And the minimum thickness of the screw hole is
It may be characterized by being performed.

[0017]

DETAILED DESCRIPTION OF THE INVENTION A first embodiment of the present invention will be described below with reference to the drawings. In addition, in each drawing, hatching showing a cross section is omitted in order to make the drawing easy to see. FIG. 1 shows the cross-sectional shape of the screw hole portion 2 in the extruded profile 1 with screw holes of the first embodiment. The extruded shape member 1 is manufactured by extrusion molding of aluminum, and is used as a window frame material of a sash, a frame material, or the like.

The screw hole portion 2 has a base end side connected to the rib 1a of the extruded shape member 1, and an opening groove 3 is formed in a portion facing the base end side. The inner peripheral surface of the screw hole portion 2 is provided with two base end side recesses 10 and two opening side recesses 20 formed by a mold during extrusion molding.

Each of the recesses 10 and 20 has an arcuate cross section. The base-side recess 10 has a line segment 31 connecting the bottom of the recess 10 (the part farthest from the center O of the screw hole 2) and the center O, and a line connecting the center O and the center position of the opening groove 3. It is formed at a position where the intersection angle θ1 with the minute 32 is 35 degrees, that is, at a position symmetrical with respect to the line segment 32. Therefore, assuming that the opening groove 3 side of the line segment 33 that passes through the center O in the screw hole portion 2 and is orthogonal to the line segment 32 is the opening side region 5 and the base end side is the base end side region 6, each base end side The recess 10 is formed in the proximal region 6.

The opening-side recess 20 has an intersection angle θ2 between a line segment 34 connecting the bottom of the recess 20 (the part farthest from the center O of the screw hole 2) and the center O and the line segment 33. Is 10 degrees (80 based on line segment 32)
It is formed in a position that becomes (degree). Therefore, the opening-side concave portion 20 is formed in the opening-side region 5.

Further, the dimension L2 from the center O to the bottom of each opening side recess 20 is the same as the dimension from the center O to the outer peripheral portion (outer peripheral surface) of the screw 50 screwed into the screw hole portion 2. On the other hand, the dimension L1 from the center O to the bottom of each proximal recess 10 is made larger than the dimension L2 from the center O to the outer peripheral surface of the screw 50 that is screwed into the screw hole portion 2, and one dimension of each proximal recess 10 is reduced. The part is provided on the outer peripheral side of the screw 50. Therefore, as shown in FIG. 2, when the screw 50 is screwed in, the screw 50 engages with the screw engaging portions 2a to 2e (the shaded portion in FIG. 2) inside the outer circumference of the screw 50. Will be done.

Here, the respective dimensions L1 and L2 are appropriately set according to the type of the extruded profile 1 used, and the like.
For example, L1 = 2.25 mm and L2 = 2.0 mm are set.
Also, the dimension from the center O to the outer periphery of the screw hole portion 2 is R
3.2 (radius 3.2 mm), the rib 1a has a wall thickness of 1 mm
Is set to. For this reason, in the screw hole portion 2, the portion having the smallest wall thickness is the six places indicated by the dimension t1 in FIG. That is, the four positions between the recesses 10 and 20 and the arcuate outer peripheral portion of the screw hole portion 2, and the recess 10
Between the rib and the surface of the rib 1a opposite to the screw hole portion 2
It is a place. The thickness t1 of each of these parts is 1.2 mm in the present embodiment.

In this embodiment, for example, the screw hole portion 2 is integrally formed by extrusion molding on the extruded shape member 1 used as the upper and lower frames and the upper and lower frames of the window frame and shoji. Then, the screw 50 is screwed into the screw hole portion 2 through the vertical frame or the vertical frame to assemble. On this occasion,
When the screw 50 is screwed into the screw hole portion 2, the screw 50
The thread of the bite bites into and engages with each of the engaging portions 2a to 2e.

At this time, if the screw 50 is screwed in the direction of the arrow 51 in FIG. 2, the cutting chips generated in the engaging portions 2a and 2b are located outside the screw 50 in the proximal recess 10 adjacent to the engaging portion 2b. Into the discharge groove 11 and is discharged. Further, the cutting waste generated in the engagement portion 2c enters the discharge groove 12 outside the screw 50 in the base-side recess 10 adjacent to the engagement portion 2c and is discharged. Further, the cutting chips generated in the engaging portions 2d and 2e are discharged from the opening groove 3.

According to this embodiment, the following effects can be obtained. (1) Two base end side recesses 10 are formed in the base end side region 6 of the screw hole 2, and the depth dimension of the base end side recess 10 is increased so that the discharge grooves 11 and 12 are formed. Since it is configured as described above, it is possible to easily discharge the cutting waste generated when the screw 50 is screwed in by using the discharge grooves 11 and 12 and the opening groove 3. Therefore, the cutting debris does not get caught between the screw 50 and the inner peripheral surface of the screw hole portion 2, and such a cutting debris increases the screwing torque or causes excessive stress in the screw hole portion 2. In addition, deformation of the screw hole portion 2 and opening of the opening groove 3 side can be prevented. Therefore, the torque at the time of screwing can be suppressed, and the joint strength by the screw 50, that is, the performance of the screw hole portion 2 can be improved.

(2) Since the two opening-side recesses 20 are formed in the opening-side region 5 of the screw hole portion 2, the areas of the engaging portions 2a to 2e can be adjusted. From this point as well, the screw 50 can be screwed in. It is possible to improve the balance between the torque and the performance of the screw hole portion 2 (pulling force of the screw 50, etc.). That is, when the area of the engaging portions 2a to 2e is large, the pulling-out force is improved, but the screwing torque increases, the screwing time increases, and the workability decreases. On the other hand, the engaging portions 2a to 2e
If the area is small, the screwing torque is reduced and the screwing time is shortened, but the extraction force is reduced. In contrast,
According to the present embodiment, by forming the opening-side concave portion 20, the screwing torque can be reduced by suppressing the area of the engaging portions 2a to 2e to some extent, and the pulling-out force can be secured, which has a good balance of workability and performance. The screw hole portion 2 can be configured.

(3) By forming the recesses 10 on the base end side and the recesses 20 on the opening side, the minimum thickness portion of the screw hole portion 2 (the portion having the thickness t1) is dispersed at 6 positions of the screw hole portion 2. Can be provided. For this reason, since the thin portion where the stress is concentrated is dispersed, the stress at the time of screwing the screw 50 can be dispersed throughout the screw hole portion 2, and the entire screw hole portion 2 can be softly deformed. Therefore, unlike the conventional screw hole, since there are few places where stress is concentrated, the screw hole portion 2 is not distorted or deformed, and the opening dimension of the opening groove 3 can be made very small. Although the screw 50 can be locked by the entire screw hole portion 2 and the areas of the engaging portions 2a to 2e are relatively small, the pulling force of the screw 50 can be maintained at a necessary and sufficient level. Therefore, the screw hole portion 2 having excellent characteristics can be obtained.

(4) Further, the screw hole 2 is entirely screwed
Since it is softly deformed so as to wrap 0, the screw 50 does not move to the opening groove 3 side and escapes at the time of screwing, and also in this respect, the screw hole portion 2 excellent in pulling force can be obtained.

(5) Since the base end side concave portion 10 and the opening side concave portion 20 are arranged at the above angular positions, for example, the engaging portions 2a and 2
It is possible to provide a portion that is axisymmetric with respect to the center O, such as d or the engaging portions 2b and 2e. Therefore, for example, the inner diameter of the screw hole (the diameter of the inner peripheral surface of each of the engaging portions 2a to 2e) can be measured by using an inner diameter measuring instrument including a contactor that comes into contact with the inner peripheral surface of the screw hole by elastic force. . Further, even in the inner diameter measuring instrument provided with three contacts arranged at 120 ° intervals, the engaging portions 2a, 2c, 2e
The inner diameter can be measured by abutting against. Furthermore, since the inner diameter of the screw hole can be measured, the depth dimension of each recess 10 and 20 can be easily obtained by measuring the dimension between the engaging portions 2a to 2e facing each recess 10 and 20. . In addition, since the outer circumference of the screw hole portion 2 can be formed in an arc shape without irregularities, the outer diameter of the screw hole portion 2 can be easily measured using a measuring device such as a micrometer. Therefore, the accuracy of the manufacturing can be easily confirmed, and the highly accurate screw hole portion 2 can be manufactured. From this point as well, the screw hole portion 2 having a small screwing torque and a large pulling force can be manufactured.

(6) Further, since the outer peripheral surface of the screw hole portion 2 is formed in an arc shape and the recesses 10 and 20 are formed only on the inner peripheral surface, when the outer peripheral surface is also uneven. In comparison, the extruded profile 1 including the screw hole portion 2 can be easily extruded and the manufacturing cost can be reduced.

Another embodiment of the present invention will be described below. In each embodiment, the same or similar components as in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted or simplified. In addition, in the drawings of the respective embodiments, hatching showing a cross section is omitted in order to make the drawings easy to see.

FIG. 3 shows a main part of the extruded profile 100 with screw holes according to the second embodiment of the present invention. The screw hole portion 2 provided in the extruded shape member 100 is provided at a position apart from the main body of the shape member, and therefore the screw hole portion 2 is connected to the main body side by one rib 101.

Also in this embodiment, the inner peripheral surface of the screw hole portion 2 is the same as that of the first embodiment, and two base end side recesses 10 and two opening side recesses 20 are formed. Also, from the bottom of each recess 10 and 20 to the screw hole 2
The portion up to the outer periphery (the portion having the dimension t1) is the screw hole portion 2
In, the outer peripheral shape of the screw hole portion 2 is set so that it has the smallest thickness and has the same dimension t1. Therefore, in this embodiment, there are four portions having the smallest wall thickness corresponding to the recesses 10 and 20, respectively.

In this embodiment as well, the screw 5 is used.
When 0 is screwed in, the cutting waste is discharged from each of the discharge grooves 11 and 12 and the opening groove 3, and is not caught between the screw hole portion 2 and the screw 50, and the small-thickness portions are dispersed at four places. Therefore, the stress is also dispersed throughout the screw hole portion 2. Therefore, the same effects as (1) to (6) of the first embodiment can be obtained.

FIG. 4 shows an essential part of an extruded profile 200 according to the third embodiment of the present invention. The screw hole portion 2 provided in the extruded shape member 200 is connected to the shape member body by a rib 201 provided at an intermediate portion on the opening side and the base end side. Also in this embodiment, the inner peripheral surface of the screw hole portion 2 is the same as that of the first embodiment, and two base end side recesses 10 and two opening side recesses 20 are formed. Further, in the screw hole portion 2, the portion with the smallest thickness is
There are two portions of the dimension t2 (for example, 0.95 mm) between the base end side recess 10 and the outer periphery of the screw hole portion 2. In the present embodiment, since the rib 201 is formed in the intermediate portion of the screw hole portion 2, a part of the stress applied to the screw hole portion 2 when the screw 50 is screwed in can be supported by the rib 201. Therefore, even if the thickness of the base end side recess 10 is smaller than that of the other portion, stress is not concentrated on that portion, and the opening on the side of the opening groove 3 can be prevented.

In this embodiment as well, the screw 5 is used.
When 0 is screwed in, the cutting waste is discharged from the discharge grooves 11 and 12 and the opening groove 3 without being caught between the screw hole portion 2 and the screw 50, and the rib 201 prevents the thickness of the base end side concave portion 10 from increasing. Since a part of the stress applied to the small portion can be supported, the stress is also dispersed in the entire screw hole portion 2. Therefore, the same effects as (1) to (6) of the first embodiment can be obtained.

FIG. 5 shows an essential part of an extruded profile 300 according to the fourth embodiment of the present invention. The screw hole portion 2 provided in the extruded shape member 300 is arranged at a position farther from the rib 301 than the screw hole portion 2 of the first embodiment. Further, the other rib 302 is formed thicker than the one rib 301.

Also in this embodiment, the inner peripheral surface of the screw hole portion 2 is the same as that of the first embodiment, and two base end side recesses 10 and two opening side recesses 20 are formed. Further, in the portion having the smallest wall thickness in the screw hole portion 2, since the ribs 301, 302 have a large wall thickness, the dimension t1 between each recess 10, 20 and the outer peripheral surface of the screw hole portion 2 is increased.
There are four parts.

In this embodiment as well, the screw 5 is used.
When 0 is screwed in, the cutting waste is discharged from each of the discharge grooves 11 and 12 and the opening groove 3, and is not caught between the screw hole portion 2 and the screw 50, and the small-thickness portions are dispersed at four places. Therefore, the stress is also dispersed throughout the screw hole portion 2. Therefore, the same effects as (1) to (6) of the first embodiment can be obtained.

FIG. 6 shows a main part of an extruded profile 400 according to the fifth embodiment of the present invention. The screw hole portion 2 provided in the extruded shape member 400 includes ribs 401 and 402 connected to the opening side and ribs 402 connected to the base end side, and ribs 401 and 402 arranged in different steps form the shape member main body. Are linked to.

Also in this embodiment, the inner peripheral surface of the screw hole portion 2 is the same as that of the first embodiment, and two base end side recesses 10 and two opening side recesses 20 are formed. Also, from the bottom of each recess 10 and 20 to the screw hole 2
The portion up to the outer periphery (the portion having the dimension t1) is the screw hole portion 2
In, the outer peripheral shape of the screw hole portion 2 is set so that it has the smallest thickness and has the same dimension t1. Therefore, in this embodiment, there are four portions having the smallest wall thickness corresponding to the recesses 10 and 20, respectively.

In this embodiment as well, the screw 5 is used.
When 0 is screwed in, the cutting waste is discharged from each of the discharge grooves 11 and 12 and the opening groove 3, and is not caught between the screw hole portion 2 and the screw 50, and the small-thickness portions are dispersed at four places. Therefore, the stress is also dispersed throughout the screw hole portion 2. Therefore, the same effects as (1) to (6) of the first embodiment can be obtained.

The present invention is not limited to the above embodiments. For example, in each of the above-described embodiments, the inner peripheral shape of the screw hole portion 2 is the same, but it is not always necessary that they are the same. For example, in the extruded profile 300 shown in FIG. 5, since the rib 302 has a large wall thickness, the depth of the proximal recess 10 on the rib 302 side is made larger than that of the proximal recess 10 on the rib 301 side. The difference in wall thickness may be reduced. However, if the inside of the screw hole portion 2 has the same shape as in each of the above-described embodiments, the mold of the portion can be made common, and the setting of the manufacturing conditions and the quality control can be made common to improve the manufacturing efficiency. In addition, there is an advantage that performance setting (setting of screwing torque and pulling force) as the screw hole portion 2 can be easily performed.

The opening-side recess 20 is not always necessary, and depending on the implementation, as shown in FIG.
An extruded shape member 500 having a screw hole portion 501 in which only the base end side recess 10 is formed may be used. In this case, since the opening side concave portion 20 is not provided and the areas of the engaging portions 2a and 2d are large, the screwing torque and the pulling force are large. However, also in this extruded shape member 500, cutting waste can be discharged through the discharge grooves 11 and 12 when the screw 50 is screwed in, and the screwing torque increases due to the cutting waste being caught between the screw hole portion 501 and the screw 50, and stress. Can be prevented from concentrating.

Further, each base end side recess 10 and each opening side recess 2
The arrangement position of 0 is not limited to the position of the above-described embodiment, and may be appropriately set in the regions of the base end side region 6 and the opening side region 5. For example, each of the base end side concave portions 10 has a θ1 of 30.
It suffices that the opening-side recessed portion 20 is arranged in the range of about 5 to 15 degrees.

Further, each base end side concave portion 10 has at least 2
One or more may be provided, and three or more may be arranged. However, considering the general size of the screw hole 2 and the depth required for the discharge grooves 11 and 12,
It is most preferable to provide two base end side recesses 10 as in the above-described embodiments. Similarly, three or more opening-side recesses 20 may be provided, but it is preferable to provide two opening-side recesses 20 in consideration of the area dimensions of the engaging portions 2a and 2e.

Further, the extruded shape member in which the screw hole portion 2 of the present invention is incorporated is not limited to the extruded shape member used for various window frames and shoji, and can be widely applied to various shape members such as doors and decorative materials. Further, the material of the extruded shape material is not limited to aluminum, and various extrudable metals and resins can be used. In addition, the extruded profile used for window frames and shoji is not limited to the general frame and frame that are entirely made of aluminum, but also applied to heat-insulated profiles that combine heat-insulating materials. it can.

[0048]

According to such an extruded profile with screw holes of the present invention, at least two base end side concave portions are formed in the base end side region, so that cutting scraps can be easily discharged when the screw is screwed in. It is possible to prevent a large stress from being applied to the screw hole portion due to this scrap and to be deformed. Further, if the opening-side recess is formed in addition to the base-end-side recess, stress concentration can be relieved, and distortion or deformation of a part of the screw hole portion can be prevented.

[Brief description of drawings]

FIG. 1 is a sectional view showing a main part of an extruded profile with screw holes according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a main part of the first embodiment.

FIG. 3 is a cross-sectional view showing a main part of an extruded profile with screw holes according to a second embodiment.

FIG. 4 is a cross-sectional view showing a main part of an extruded profile with screw holes according to a third embodiment.

FIG. 5 is a cross-sectional view showing the main parts of an extruded profile with screw holes according to a fourth embodiment.

FIG. 6 is a cross-sectional view showing a main part of an extruded profile with screw holes according to a fifth embodiment.

FIG. 7 is a cross-sectional view showing a main part of an extruded profile with screw holes according to a modified example of the invention.

[Explanation of Codes] 1, 100, 200, 300, 400, 500 ... Extruded profile with screw hole, 2, 501 ... Screw hole portion, 2a ...
2e ... Engagement portion, 3 ... Opening groove, 5 ... Opening side region, 6 ... Base end side region, 10 ... Base end side recessed portion, 11, 12 ... Discharge groove, 20
... Opening side concave portion, 50 ... Screw, t1 ... Wall thickness dimension, O ... Center of screw hole.

Claims (6)

(57) [Claims] 1. A screw hole part in which a screw hole is formed on an inner peripheral surface is integrally formed, and a screw hole portion in a base end side region which is a base end side opposite to an opening groove formed in the screw hole part from a center position of the screw hole At least 2 on the circumference
The locations are base end recess is formed, the dimension from the center position of the screw hole to the bottom of the base end recess is larger than the size to the outer peripheral portion from the center of the screw screwed into the screw hole, the base The end side recess is located in the center of the screw hole and in the opening groove.
Symmetrical with respect to the direction of the center line connecting the heart and the direction of the center line
2 formed at a position of 30-40 degrees to each direction
Extruded profile with screw holes, which is composed of two recesses . 2. An opening-side recess is formed at least at two locations on the inner peripheral surface of the screw hole in the opening-side region, which is the opening groove side formed in the screw hole portion from the center position of the screw hole, and the opening-side recess is formed from the center position of the screw hole. dimensions to the bottom portion of the opening-side recess is smaller than the dimension from the center position of the screw hole to the bottom of the base end recess, said opening-side recess, in the center position and the open groove of the screw holes
The center is symmetrical with respect to the direction of the center line connecting the heart and the center.
It is formed at the position of 75 to 85 degrees with respect to the line direction.
The extruded profile with screw holes according to claim 1, characterized in that the extruded profile has two recesses . 3. The screw hole according to claim 2, wherein a dimension from a center position of the screw hole to a bottom portion of the opening side recess is equal to a dimension from a center of a screw screwed into the screw hole to an outer peripheral portion. Extruded profile. 4. The thickness of each of the base end side concave portion and the opening side concave portion is made equal, and the thickness is set to the minimum thickness in the screw hole portion. Extruded profile with screw holes. 5. A screw hole having a screw hole formed on the inner peripheral surface thereof.
From the center of the screw hole
On the base end side facing the opening groove formed in the screw hole
At least 2 of the inner peripheral surface of the screw hole in the proximal region
A base end side concave portion is formed at the location, and it is formed from the center position of the screw hole to the screw hole portion.
Inner peripheral surface of the screw hole in the opening side area that is the opening groove side
Of the screw holes are formed in at least two positions of the base hole from the center position of the screw hole to the bottom of the base end side recess.
Is the center of the screw screwed into this screw hole
From the center of the screw hole to the bottom of the opening-side recess.
Is measured from the center of the screw hole to the base end side.
It is smaller than the dimension to the bottom of the recess, and this screw
Dimension from the center of the screw screwed into the hole to the outer periphery
Extruded profile with screw holes, which is characterized by being equal to. 6. A screw hole having a screw hole formed on the inner peripheral surface thereof.
From the center of the screw hole
On the base end side facing the opening groove formed in the screw hole
At least 2 of the inner peripheral surface of the screw hole in the proximal region
A base end side concave portion is formed at the location, and it is formed from the center position of the screw hole to the screw hole portion.
Inner peripheral surface of the screw hole in the opening side area that is the opening groove side
Of the screw holes are formed in at least two positions of the base hole from the center position of the screw hole to the bottom of the base end side recess.
Is the center of the screw screwed into this screw hole
To the outer peripheral portion, and the thicknesses of the base end side concave portion and the opening side concave portion are equal.
And the minimum thickness in the screw hole
Extrusion type with screw holes characterized by being made thick
Material.