JP7246023B2 - screw caps and door jambs - Google Patents

Description

The present invention relates to a screw cap for hiding the head of a screw and a door frame provided with the same.

Conventional screw caps of this type, for example, when fixing the door frame to the base with screws, hide the head of the screw after attaching the screw through the round screw mounting hole provided on the bottom surface of the door jamb. It is used by fitting it into the screw mounting round hole.

Since this round screw mounting hole is provided on the bottom surface of the door jamb, it is naturally required that the screw cap mounted in the round screw mounting hole does not protrude from the bottom surface of the door jamb. Therefore, the screw cap is small in shape and size so that the entire screw cap can be fitted into the round screw mounting hole.

JP-A-2002-276248

However, since the size of the screw cap is so small that it roughly corresponds to the head of the screw, there is a risk of accidental swallowing by small children in the event that the screw cap falls off, which poses a safety problem. .

SUMMARY OF THE INVENTION The present invention has been proposed in consideration of such circumstances, and its object is to provide a screw cap and a door frame equipped with the screw cap which will not be swallowed by mistake even if the screw cap comes off the door frame. It is in.

In order to achieve the above object, the screw cap of the present invention is a screw cap that conceals the head of a screw attached to a screw mounting recess of a door frame and the screw mounting recess, comprising: a flat plate-like main body; and an engaging portion that engages with the screw mounting recess, wherein the flat plate-shaped body portion is larger than a swallow determination gauge defined in JIS C8513, and the screw mounting recess formed on the bottom surface of the door jamb. It is characterized by having a shape and dimensions that match the

Moreover, the door frame of the present invention is characterized by comprising the screw cap described above.

Since the screw cap of the present invention has the structure described above, even if the screw cap comes off the door frame, there is no risk that the screw cap will be swallowed by mistake, and the screw cap can be safely used in places where animals and small children are present. can be used. In particular, in facilities such as nursery schools and kindergartens where many children gather, the use of this screw cap is effective as a safety measure.

In addition, since the door frame of the present invention has the structure described above, even if the screw cap attached to the door frame comes off, there is almost no risk that the screw cap will be swallowed by mistake. Safe to use. In particular, in facilities such as nursery schools and kindergartens where many children gather, if this door frame is adopted, it is effective as a safety measure.

BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing of the screw cap which concerns on embodiment of this invention, and a door frame provided with the same. (a) is an exploded perspective view showing a main part of an example of a door frame, (b) is an exploded perspective view showing a main part of the other example, and (c) is a plan view corresponding to (b). (a) is a cross-sectional view of a screw cap corresponding to line AA in FIG. 1(a) and a partial cross-sectional view of a door frame to which this screw cap is attached. (b) is a front view of the same screw cap, and (c) is a perspective view of a swallow determination gauge. (a) to (f) show various six cases of no swallowability (safe) / swallowability (dangerous) judged by a swallow judgment gauge. ) is a front view. (a) to (c) are vertical sectional views showing other three examples of screw caps.

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings.
First, the basic structure of the screw cap 20 and the mounting manner of the screw cap 20 to the door frame member for the door frame will be described.

The screw cap 20 is a member that conceals the head 2 of the screw 1 attached to the screw mounting recess 15 of the door frame 10 and the screw mounting recess 15, as shown in FIGS. The screw cap 20 has a flat plate-like body portion 21 and an engaging portion 25 that engages with the screw mounting recess 15. greater than

The screw cap 20 is attached to a door frame member 11 (vertical frame member 11 in the figure) to constitute a door frame (vertical frame 10). The screw cap 20 and the vertical frame 10 having the screw cap 20 will be described below.

FIGS. 1(a) and 1(b) are perspective views showing two examples of how two types of screw caps 20 are attached. Each screw cap 20 is attached to a screw attachment recess 15 provided in the door jamb 12 of the vertical frame member 11 . A screw-mounting round hole 17 is provided approximately in the center of the bottom surface of the screw-mounting recess 15 , and the vertical frame member 11 is fixed to a base 19 for fixing by screws 1 through this screw-mounting round hole 17 . A plurality of screw mounting round holes 17 are formed along the vertical direction of the vertical frame member 11 . Hereafter, it demonstrates according to the aspect of FIG.1(a)(b).

In the example shown in FIG. 1( a ), one screw mounting recess 15 is provided corresponding to one screw mounting round hole 17 , and the screw cap 20 is attached to the screw mounting recess 15 . . As shown in FIGS. 1(a) and 2(b), the screw mounting recess 15 has a rectangular shape, a round screw mounting hole 17 is opened in the center, and a stepped recess 16 is formed around the opening side. there is The width of the recessed step 16 is 80% or more of the width of the door jamb 12. In this example, the width of the door jamb 11 is approximately 40 mm, and the width of the recessed step 16 is approximately 35 mm. Moreover, the vertical dimension of the step recess 16 is approximately 32 mm.

The screw cap 20 has a rectangular plate-like body portion 21 corresponding to the shape of the screw mounting recess 15 . A pair of opposing edge portions of the flat plate-shaped body portion 21 are each provided with a leg portion 22 protruding toward the back side corresponding to the entire length of the edge. A low cylindrical protrusion 23 with an open end is formed to engage with the round mounting hole 17 . It should be noted that the flat plate-like body portion 21 may have a slightly curved surface.

The pair of leg portions 22 and the protrusion 23 constitute an engaging portion 25 that engages with the screw mounting recess 15 . As indicated by the two-dot chain line in FIG. 2( a ), the leg portion 22 contacts the edge of the step recess 16 parallel to the direction in which the door jamb 12 extends, and the tip of the leg portion 22 contacts the bottom surface of the step recess 16 . , and the screw cap 20 is attached so that the projection 23 engages the screw attachment round hole 17. As shown in FIG.

The depth of the stepped recess 16 substantially matches the dimension from the surface of the flat plate-like main body 21 to the tip of the leg 22, and when the screw cap 20 is attached, the surface 26 of the screw cap 20 and the door. It is almost flush with the bottom surface 13 of the jamb 12 (see FIG. 2(a)). In addition, if the surface 26 of the screw cap 20 is formed with a decorative surface of substantially the same type as the decorative surface of the vertical frame member 11, the screw cap 20 becomes less conspicuous, and the substantially flush surfaces are expressed as a single unit. can do.

Since the screw cap 20 is attached correspondingly to one screw attachment round hole 17 in this manner, the screw cap 20 is easy to handle, and the leg portion 22 and the protrusion 23 are attached to the stepped recess portion 16 . It is hard to come off because it is engaged. Further, to prevent detachment, the screw cap 20 may be attached using an adhesive.

Next, the size relationship between the plate-like main body 21 of the screw cap 20 and the swallow determination gauge 30, which defines the size of a battery that may be swallowed by a person (child) according to the JIS standard "JIS C8513", will be described. In the following, it is abbreviated simply as "swallow determination gauge 30".

The swallow determination gauge 30 has an inclined upper end, and has a cylindrical shape in which an inclined elliptical upper end opening 31 communicates with a circular lower end opening 32 . If the object to be swallowed has a size that does not fit in the cylinder of the swallowing determination gauge 30, it can be judged that it cannot be swallowed, that is, it has a safe size that does not cause the risk of accidental ingestion.

The swallow determination gauge 30 has an inner diameter L of 31.7 (+0.1) mm, a height dimension H1 of 25.4 (+0.1) mm, and a height dimension H2 of 57.1 (+0.1) mm. It is a thing.

The flat plate-like body portion 21 of the screw cap 20 shown in FIG. 1(a) has a length dimension (width dimension) of L1 (mm) on one side and It has a rectangular shape with a length dimension of L2 (mm) (<L1). Since the flat plate main body 21 matches the shape and dimensions of the step recess 16, the flat main body 21 has a maximum side length L1 of 35 mm and a minimum side length L2 of 32 mm.

Therefore, the magnitude relationship between these dimensions and the inner diameter L of the swallow determination gauge 30 is
L1 > minimum side length L2 > inner diameter L of swallow determination gauge 30
is represented.

Due to such a dimensional relationship, the screw cap 20 cannot be accommodated in the cylinder of the swallow determination gauge 30. As shown in FIG. Specifically, although a portion of one side of the dimension L2 can be inserted through the upper end opening 31 of the swallow determination gauge 30, most of the portion protrudes and cannot be passed. In other words, the flat plate-like body portion 21 is larger than the swallow determination gauge 30 specified in "JIS C8513".

Therefore, even if such a screw cap 20 falls off from the vertical frame 10 or is removed by a child, there is no fear that the child will swallow it and it is safe. Therefore, such a screw cap 20 can be suitably used in facilities where there are many infants and children, such as nursery schools and kindergartens.

Further, in the example shown in FIG. 1(b), screw mounting recesses 15 having a length corresponding to the door wall 12 are provided corresponding to a plurality of screw mounting round holes 17 provided over the entire length of the door wall 12. The screw cap 20 is attached to the screw attachment recess 15 . As shown in FIGS. 1(a) and 1(c), the screw mounting round hole 17 is opened substantially in the widthwise center of the door jamb 12, and a step recess 16 is formed around it.

The stepped concave portion 16 is arranged substantially in the center of the width direction of the door jamb 12, and its width dimension is 80% or more of the width dimension W of the door jamb 12, and in this example, the width dimension of the door jamb 12. W is approximately 35 mm, and the width dimension of the step recess is approximately 28 mm.

The screw cap 20 has an elongated shape corresponding to the entire length of the step recess 16, and legs 22 protruding toward the back side are provided at both ends in the width direction. The pair of leg portions 22 constitutes an engaging portion 25 that engages with (the stepped recess portion 16 of) the screw mounting recess portion 15 . In consideration of errors in the positions of the screw mounting round holes 17, the screw cap 20 is not formed with the protrusions 23 (see FIG. 2A) that engage with the screw mounting round holes 17. As shown in FIG. Further, the flat plate-shaped body portion 21 may have a slightly curved surface, and in particular, the center in the width direction may be convexly curved or concavely curved.

1(a), the screw cap 20 is also hollowed out, but since there is no protrusion 23 in the center, there is a possibility that the center will be pressed and dented after being attached to the stepped recess 16. be. Therefore, a rib 24 parallel to the legs 22 and having the same projecting dimension as the legs 22 may be provided at the center of the back surface in the width direction to improve the strength.

Since the depth of the step recess 16 substantially matches the dimension from the surface 26 of the flat plate-like main body 21 to the tip of the leg 22, when the screw cap 20 is attached, the surface 26 of the screw cap 20 and , and the bottom surface 13 of the door jamb 12 (see FIG. 1(c)). In addition, if the surface 26 of the screw cap 20 is formed with a decorative surface of substantially the same system as the decorative surface of the vertical frame member 11, the screw cap 20 becomes less conspicuous, and the substantially flush surfaces can be integrally formed. can be expressed.

As described above, since the screw cap 20 corresponds to the entire length of the door jamb 12, the installation work for one vertical frame member 11 can be completed in a short time. Also, the screw cap 20 may be attached using an adhesive to prevent it from coming off.

Since the flat plate-shaped body portion 21 of the screw cap 20 matches the shape and dimensions of the step recess 16, the width L3 of the screw cap 20 is approximately 28 mm, and the vertical dimension is the full length of the step recess 16. match.

Therefore, the screw cap 20 has a width dimension L3 smaller than the inner diameter L of the swallowing judgment gauge 30 and passes through the swallowing judgment gauge 30, but has a large length dimension, and the flat plate-like body portion 21 is larger than the swallowing judgment gauge 30. .

Naturally, such a long-shaped screw cap 20 is unlikely to be swallowed by mistake. Even if the screw cap 20 falls off the vertical frame 10 or is removed by a child, there is no risk that the screw cap 20 will be swallowed by an animal or a child, so it is safe. Such a screw cap 20 can also be suitably used in facilities such as nursery schools and kindergartens.

Next, various examples of no possibility of swallowing (safe)/possibility of swallowing (dangerous) that can be determined by the swallow determination gauge 30 will be described with reference to FIGS. 3(a) to (f).

In the example of FIG. 3(a), the object (flat plate-like main body 21 of the screw cap 20) is rectangular. As shown in FIG. 3( a ), the minimum side length of the object is smaller than the inner diameter L of the swallow determination gauge 30 . It protrudes more and does not fit in the swallow determination gauge 30 as a whole. In other words, the object is larger than the swallow determination gauge 30, and it can be determined that there is no danger that the child will swallow it. However, the object has a shape and size that can pass through the swallow determination gauge 30 .

In the example of FIG. 3B, the object is circular. Since the diameter of this object is larger than the inner diameter L of the swallow determination gauge 30, it can be determined that the object cannot be swallowed.

3(c) and 3(d) are both examples in which the object is elliptical. In the case of FIG. 3(c), the minor axis of the elliptical shape is smaller than the inner diameter L of the swallow determination gauge 30, but since a portion protrudes from the upper end opening 31, it can be determined that swallowing is impossible. Note that this object also passes through the swallow determination gauge 30 . In the case of FIG. 3(d), since the minor axis of the object is larger than the inner diameter L of the swallow determination gauge 30, it can be determined that the object cannot be swallowed.

The two examples shown in FIGS. 3(e) and 3(f) are examples in which there is a possibility of swallowing. Whether the object is rectangular as shown in FIG. 3E or circular as shown in FIG. It can be judged that there is a possibility of swallowing.

As an object that cannot be swallowed, there is no problem as long as it is slightly larger than the swallow determination gauge 30 as shown in FIGS. It is safer if it has a flat plate-like body portion 21 as shown in a). Specifically, it is desirable that the flat plate-like main body 21 has a circular shape with a diameter of 32 mm or more, an elliptical shape with a minor axis of 32 mm or more, or a rectangular shape with a minimum side length of 32 mm or more. Of course, an elongated one as shown in FIG. 1(b) may also be used.

Considering the above, in FIG. 1(a), the length L1 of one side of the flat plate-like main body 21 is smaller than the inner diameter L of the swallow determination gauge 30 in accordance with the width of the door jamb 12. Even so, a non-swallowable biscap 20 can be formed. That is, even if the length dimension L1 of one side of the flat plate-like body portion 21 is about 30 mm, the length dimension L2 of the other side is increased to about 40 mm, for example, so that the flat plate-like body as shown in FIG. Part 21 should do. By doing so, it can be used as a non-swallowable biscap 20 . Similarly, when the width dimension of the door jamb 12 is small, the flat plate-like body portion 21 may be formed in an elliptical shape as shown in FIG. 3(c).

Next, three examples of other shapes of the screw cap 20 shown in FIGS. 4(a) to 4(c) will be described. The shape of the flat plate-like body portion 21 of these screw caps 20 is the same as that shown in FIG. 1(a). In other words, these screw caps 20 are larger than the swallow determination gauge 30 . The cross-sectional views shown in these figures correspond to line AA in FIG. 1(a).

The screw cap 20 shown in FIG. 1(a) has a flat plate-like main body 21 with leg portions 22. In contrast, the screw cap 20 shown in FIGS. , which can be fitted into the stepped recess 16 of the screw mounting recess 15 without forming a space, and has a substantially flat plate shape. The one shown in FIG. 4(a) does not have a protrusion 23 that engages with the round screw mounting hole 17, and the one shown in FIG. 4(b) has a protrusion 23. FIG. Thus, these constitute the engaging portion 25 in which the flat plate-like body portion 21 itself engages with the screw mounting recess 15 .

Thus, since the screw cap 20 shown in FIGS. 4A and 4B is not hollowed out, it does not bend when attached to the screw attachment recess 15, and the strength can be increased.

The screw cap 20 shown in FIG. 4(c) has a leg portion 22, but no protrusion 23 is formed on the rear surface. The screw mounting recess 15 to which the screw cap 20 is mounted has a stepped recess 16 but does not have a screw mounting circular hole 17 . Therefore, the screw 1 is screwed directly from the bottom surface of the stepped recess 16, and the head 2 of the screw 1 protrudes toward the stepped recess 16. 1 can be avoided from contacting the head 2, and the head 2 can be covered. By doing so, the round screw mounting holes 17 are not required, so that the molding of the vertical frame member 11 can be simplified.

Although the screw cap 20 shown above has been described as being for the vertical frame 10, it can also be used as a screw cap for screwing the upper frame to the base, for example.

1 screw 2 head 10 vertical frame (door frame)
11 vertical frame member (door frame member)
12 door jamb 15 screw mounting recess 19 substrate 20 screw cap 21 flat plate-like main body 25 engaging portion 26 surface 30 swallow judgment gauge

Claims (6)

A screw cap that conceals the head of a screw attached to a screw mounting recess of a door frame and the screw mounting recess,
It comprises a flat plate-shaped main body and an engaging portion that engages with the screw mounting recess,
A screw cap, wherein the flat plate-shaped main body is larger than a swallow determination gauge defined in JIS C8513, and has a shape and dimensions that match the screw mounting recesses formed in the bottom surface of the door jamb . In claim 1,
A screw cap, wherein a decorative surface of substantially the same type as that of the door frame is formed on the surface side of the flat plate-like main body. In claim 1 or 2,
The screw cap is characterized in that the flat plate-shaped main body has a circular shape with a diameter of 32 mm or more, an elliptical shape with a minor axis of 32 mm or more, or a square shape with a minimum side length of 32 mm or more. In any one of claims 1 to 3,
A screw cap, wherein the width dimension of the flat plate-like main body is 80% or more of the width dimension of the door jamb. In any one of claims 1 to 4,
A screw cap, wherein the flat plate-like main body has an elongated shape corresponding to the shape of a door jamb. A door frame provided with the screw cap according to any one of claims 1 to 5.

Images