Hot melt safely door holder device

Abstract

A hot melt safety door holder device includes: a first fixing part on one side of swing end of swing door sheet; a holder with a transverse through hole and the outer hole end faces towards the first fixing part; a second fixing part in the transverse through hole, the first radial end faces towards the outer hole end of transverse through hole, the second radial end faces towards the inner hole end; a conically cylindrical space, formed between the periphery of the second fixing part and the transverse through hole, and the inside and outside diameters of the end between the transverse through hole and the second fixing part corresponding to the space tapering end of conically cylindrical space are fitted with each other. The shape of the low-melting metal material filled in the conically cylindrical space matches the shape of conically cylindrical space, resulting in equal wall thickness.

Claims

1. A hot melt safety door holder device comprising: a first fixing part adapted to be mounted on one side of a swing end of a swing door sheet, wherein said first fixing part is magnetic; a holder having a mounting part and a transverse through hole located in different positions, wherein the transverse through hole has an outer hole end and an inner hole end, the outer hole end facing said first fixing part; a second fixing part located in the transverse through hole of said holder, said second fixing part having a first radial end and a second radial end, the first radial end facing the outer hole end of the transverse through hole in said holder, the second radial end facing the inner hole end of the transverse through hole in said holder, said second fixing part being composed of a magnetic absorption part; a conically cylindrical space formed between a periphery of said second fixing part and the transverse through hole in said holder, wherein said conically cylindrical space and said second fixing part and the transverse through hole are arranged concentrically, said conically cylindrical space having a space flaring end and a space tapering end, wherein an inner diameter and an outer diameter of said conically cylindrical space between the transverse through hole and said second fixing part corresponding to the space tapering end are fitted with each other; and a low-melting point metal material filled in said conically cylindrical space so as to be formed into a conically cylindrical entity that matches a shape of said conically cylindrical space, wherein said second fixing part is positioned on said holder by said low-melting point metal material such that said second fixing part magnetically receives said first fixing part and the swing door, wherein said low-melting point metal material has a consistent melting point through a thickness thereof, said low-melting point metal material adapted to melt upon encountering a fire so as to cause said second fixing part and said first fixing part and the swing door to separate from said holder.

2. The hot melt safety door holder device of claim 1, wherein the transverse through hole in said holder has a straight hole wall, said second fixing part having a conically peripheral wall between the first radial end and the second radial end, an outer diameter of the first radial end being greater than an outer diameter of the second radial end such that the conically peripheral wall tapers from the first radial end to the second radial end, the first radial end facing the outer hole end of the transverse through hole in said holder, the second radial end facing the inner hole end of the transverse through hole, wherein an annular space is formed between the second radial end and the inner hole end of the transverse through hole.

3. The hot melt safety door holder device of claim 1, wherein a straight tubular peripheral wall is formed between the first radial end and the second radial end of said second fixing part, an outer diameter of the outer hole end of the transverse through hole in said holder is larger than an outer diameter of the inner hole end such that the transverse through hole tapers from the outer hole end to the inner hole end, wherein an annular spacing is formed between the outer hole end of the transverse through hole and the first radial end of said first fixing part.

4. The hot melt safety door holder device of claim 2, wherein a ring flange is formed around the first radial end of said second fixing part, the outer hole end of the transverse through hole in said holder has an annular shoulder, the ring flange being embedded in the annular shoulder.

5. The hot melt safety door holder device of claim 2, wherein the conically peripheral wall of said second fixing part has at least one radial concave part partially filling an area of said low-melting point metal material.

6. The hot melt safety door holder device of claim 3, wherein the conically peripheral wall of said second fixing part has at least one radial concave part partially filling an area of said low-melting point metal material.

7. The hot melt safety door holder device of claim 2, wherein a portion of the inner hole end of the transverse through hole in said holder extends outwardly to form an expanded filling notch.

8. The hot melt safety door holder device of claim 3, wherein a portion of the inner hole end of the transverse through hole in said holder extends outwardly to form an expanded filling notch.

9. The hot melt safety door holder device of claim 1, wherein said low-melting point metal material is a metal selected from the group consisting of bismuth, tin, lead, cadmium, indium and combinations thereof.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

(1) FIG. 1 is a stereogram of the preferred embodiment of the present invention.

(2) FIG. 2 is an exploded view of the preferred embodiment of this structure.

(3) FIG. 3 is a sectional view of the preferred embodiment of the present invention.

(4) FIG. 4 is a sectional view of partial enlargement of transverse through hole of the present invention.

(5) FIG. 5 is a schematic diagram of locating the second fixing part of the present invention in the transverse through hole of holder.

(6) FIG. 6 is a close-up view of FIG. 5.

(7) FIG. 7 is a schematic diagram of the second fixing part of the present invention escaping from the transverse through hole of holder.

(8) FIG. 8 is a close-up view of FIG. 7.

(9) FIG. 9 shows the embodiment where a ring flange is formed around the first radial end of the second fixing part of the present invention.

(10) FIG. 10 shows the embodiment where partial hole wall of inner hole end of the transverse through hole in the holder of the present invention extends outwards to expand the filling notch.

(11) FIG. 11 is a sectional view of FIG. 10.

(12) FIG. 12 shows the embodiment of simple holder structure of the present invention.

(13) FIG. 13 shows the embodiment of the wall-mounted holder of the present invention.

(14) FIG. 14 shows the embodiment where the first and second fixing parts of the present invention are designed as male and female fasteners.

(15) FIG. 15 shows the embodiment where the second fixing part of the present invention is designed as straight tubular peripheral wall.

DETAILED DESCRIPTION OF THE INVENTION

(16) Referring to FIGS. 1 to 4, there is shown the preferred embodiment of this hot melt safety door holder device. This embodiment is for illustration only, and the patent application is not limited to this structure.

(17) Said hot melt safety door holder device comprises a first fixing part 10, located on one side of swing end 12 of a swing door sheet 11; a holder 20 with a mounting part 21 and a transverse through hole 22 located in different positions, the transverse through hole 22 has an outer hole end 221 and an inner hole end 222, wherein the outer hole end 221 faces towards the first fixing part 10; a second fixing part 30, located in the transverse through hole 22 of the holder 20, the second fixing part 30 has a first radial end 31 and a second radial end 32, the first radial end 31 faces towards the outer hole end 221 of the transverse through hole 22 of the holder 20, the second radial end 32 faces towards the inner hole end 222 of transverse through hole 22 of the holder 20; a conically cylindrical space 40, relatively formed between the periphery of the second fixing part 30 and the transverse through hole 22 of the holder 20, the conically cylindrical space 40, the second fixing part 30 and the transverse through hole 22 of the holder 20 are arranged concentrically, the conically cylindrical space 40 has a space flaring end 41 and a space tapering end 42, and the inside and outside diameters of one end between the transverse through hole 22 and the second fixing part 30 corresponding to the space tapering end 42 are fitted with each other (note: said fit relationship includes that with fit tolerance value, the positive-negative difference of the tolerance value is minimal, but excluding that making the second fixing part 30 escape from said concentric configuration state); a low-melting metal material 50, filled in the conically cylindrical space 40, so that the entity shape of the low-melting metal material 50 matches the shape of the conically cylindrical space 40 to present a conically cylindrical entity with equal wall thickness. The low-melting metal material 50 is any one of Bi, Sn, Pb, Cd and In metals or a fusible alloy composed of any combination of them.

(18) As shown in FIG. 2, in this case, the transverse through hole 22 in the holder 20 is a straight hole; the second fixing part 30 has a conically peripheral wall 33 between the first radial end 31 and the second radial end 32, the outside diameter of the first radial end 31 is larger than the outside diameter of the second radial end 32, forming the tapered shape of the conically peripheral wall 33 from the first radial end 31 to the second radial end 32, and the first radial end 31 faces towards the outer hole end 221 of the transverse through hole 22 in the holder 20, the second radial end 32 faces towards the inner hole end 222 of the transverse through hole 22, and the inside and outside diameters are fitted with each other between the first radial end 31 and the outer hole end 221, there is an annular spacing between the second radial end 32 and the inner hole end 222.

(19) As shown in FIGS. 1 to 3, in this case, the first fixing part 10 is a magnetizer, the second fixing part 30 is a metal block embedded with a magnet 35; this case describes the implementation pattern of positioning by magnetic attraction between the first fixing part 10 and the second fixing part 30.

(20) As shown in FIG. 4, in this case, the end faces are level with each other on the same end of fitted inside and outside diameters between the transverse through hole 22 and the second fixing part 30; this case is a preferred implementation pattern, reasonably, it is easier to implement the fitted inside and outside diameters between transverse through hole 22 and the second fixing part 30.

(21) By said structural composition pattern and technical characteristics, in terms of said preferred embodiment of specific application of the hot melt safety door holder device disclosed in the present invention, as shown in FIGS. 5 and 6, the swing door sheet 11 is at an open angle and snapped by the hot melt safety door holder device. In this state, the door closer 60 for the swing door sheet 11 accumulates reset force, the first fixing part 10 of hot melt safety door holder device mounted on one side of swing end 12 of swing door sheet 11 and the second fixing part 30 are located by magnetic attraction, the second fixing part 30 and the transverse through hole 22 in the holder 20 are combined by the low-melting metal material 50 filled in the conically cylindrical space 40. In general circumstances, if the user applies a force to close the swing door sheet 11, the first fixing part 10 is disengaged from the second fixing part 30. Afterwards, as shown in FIGS. 7 and 8, when a fire occurs and the ambient temperature rises to a certain level (e.g. 45° C.), the low-melting metal material 50 melts, the bonding state between the second fixing part 30 and the transverse through hole 22 in the holder 20 is lost, the swing door sheet 11 is relatively released, the reset force accumulated by the door closer 60 pushes the swing door sheet 11 to swing towards the closing direction (see Arrow L1), and the second fixing part 30 is led out by the first fixing part 10 (for magnetic attraction), so as to escape from the transverse through hole 22 in the holder 20. When the second fixing part 30 is escaping, as the conically peripheral wall 33 tapers from the first radial end 31 to the second radial end 32, when the second fixing part 30 escapes on a curved path with the first fixing part 10, the conically peripheral wall 33 can completely avoid rubbing against the transverse through hole 22 with straight hole wall, so that the second fixing part 30 can escape smoothly.

(22) As shown in FIG. 9, in this case, a ring flange 311 is formed around the first radial end 31 of the second fixing part 30, and the outer hole end 221 of the transverse through hole 22 in the holder 20 is provided with an annular shoulder 223 for the ring flange 311 to be embedded. This implementation pattern describes that as the low-melting metal material 50 is formed by filling, if there is a large gap in one end of fitted inside and outside diameters between the transverse through hole 22 and the second fixing part 30, the low-melting metal material 50 may spill over, influencing the forming quality. Therefore, the ring flange 311 disclosed in this case can stop the low-melting metal material 50 filled in the conically cylindrical space 40, so as to avoid said problem effectively.

(23) As shown in FIGS. 10 and 11, in this case, partial hole wall of inner hole end 222 of transverse through hole 22 in the holder 20 extends outwards to form an expanded filling notch 224. Said expanded filling notch 224 is added in this case, because the space flaring end 41 of the conically cylindrical space 40 may have too small gap, resulting in difficult filling of low-melting metal material 50. Therefore, the expanded filling notch 224 can enlarge the filling area, so as to enhance the convenience of filling operation.

(24) As shown in FIG. 11, in this case, the conically peripheral wall 33 of the second fixing part 30 is provided with at least one radial concave part 331 for partial area of the low-melting metal material 50 to be filled in. Said radial concave part 331 in this case can enlarge the contact area of the formed low-melting metal material 50 embedded in the second fixing part 30, so as to further tighten the bonding state between the low-melting metal material 50 and the second fixing part 30, the stressing strength is better, to prevent them from being separated.

(25) FIG. 12 shows another embodiment of the mounting part 21B of the holder 20B. The mounting parts 21B disclosed in this case are lugs protruding on both sides of the holder 20B, each of them is provided with a locking hole 211, fastened to the floor by screw 70.

(26) FIG. 13 shows the embodiment of the holder 20C designed as wall-mounted type, the wall-mounted holder 20C disclosed in this case has higher mounting position, the larger height has higher temperature in a fire, so the low-melting metal material 50 is easy to be molten by high temperature, the action sensitivity is better.

(27) As shown in FIG. 14, the first fixing part 10B and the second fixing part 30B disclosed in this case are designed as male and female fasteners, this is a specific fixing pattern.

(28) As shown in FIG. 15, in this case, there is a straight tubular peripheral wall 34 between the first radial end 31 and the second radial end 32 of the second fixing part 30; the outside diameter of the outer hole end 221 of the transverse through hole 22 in the holder 20 is larger than the outside diameter of the inner hole end 222, so that the transverse through hole 22 tapers from the outer hole end 221 to the inner hole end 222, and the inside and outside diameters are fitted with each other between the inner hole end 222 of the transverse through hole 22 and the second radial end 32 of the second fixing part 30, and there is an annular spacing between the outer hole end 221 of the transverse through hole 22 and the first radial end 31 of the second fixing part 30. This case describes that the wall thickness increasing direction of the low-melting metal material 50 can implement the equal effect of the implementation pattern of different ends disclosed in FIG. 4.