JP7274281B2 - Fireproof fittings - Google Patents

Description

The present invention relates to rotating bodies and fittings.

In recent years, due to the promotion of barrier-free buildings, etc., there is a demand for large door openings. When the door has a large opening, the weight of the shoji increases proportionally, increasing the load on the door rollers. When the door roller supports a heavy shoji, the surface of the door may be greatly worn, peeled off or deformed as the door is used, which may hinder the opening and closing of the door.

Conventionally, measures such as increasing the diameter of door rollers and increasing the number of door rollers have been taken to improve the load resistance (see Patent Document 1, for example). However, in either case, there is a problem that the cost increases in terms of mass production because it is necessary to manufacture the stile from a mold in accordance with the design specifications of the door and the manner of use of the door roller.

Furthermore, for long-term use, a rotating body such as a door roller is required to have wear resistance. If the coefficient of friction between the rotating body and the contacting body is large, the wear of the rotating body will also increase. As the wear progresses, the rotating body will deform and interfere with opening and closing. may cause it. Furthermore, the worn rotating body has irregularities on its surface, and the generated abrasion dust aggregates and remains.

JP 2018-115423 A

The present invention has been made in view of the above, and an object of the present invention is to suppress wear by coating the surface of the rotating body with a slipping agent, thereby improving the durability of the rotating body.

(1) The present invention provides a rotating body comprising a main body and a sliding layer made of fluororesin on the surface of the main body, and capable of smoothly moving an object in contact with the rotating body by rolling. do.

(2) In the invention of (1), the fluororesin preferably contains PTFE or ETFE.

(3) In the invention (1) or (2), it is preferable that the sliding layer is formed at least on the contact surface between the rotating body and the object.

(4) In the inventions (1) to (3), it is preferable that the sliding layer is formed between the main body and the intermediate layer.

(5) In the inventions (1) to (4), the intermediate layer is preferably made of acrylic resin or epoxy resin.

(6) The present invention also provides fittings having the rotating body according to (1) to (5).

ADVANTAGE OF THE INVENTION According to this invention, abrasion is suppressed by coating a slip agent on the surface of a rotating body, and the durability of a rotating body improves.

It is a figure showing the fire door concerning one embodiment of the present invention. 1 is a longitudinal sectional view of a fire door according to one embodiment of the present invention; FIG. It is a figure showing the door roller which concerns on one Embodiment of this invention. FIG. 4 is a diagram showing a door roller and fixture according to one embodiment of the present invention; FIG. 2 is a diagram schematically showing a cross-sectional configuration of a door roller according to an embodiment of the present invention; It is a figure showing the door roller adjustment hole of the fire door which concerns on one Embodiment of this invention. It is a figure which shows the arrangement|positioning of the heating foam material in the fire door which concerns on one Embodiment of this invention. It is a figure which shows the arrangement|positioning of the heating foam material in the fire door which concerns on one Embodiment of this invention. It is a figure which shows the arrangement|positioning of the heating foam material in the fire door which concerns on one Embodiment of this invention. It is a figure which shows the arrangement|positioning of the heating foam material in the fire door which concerns on one Embodiment of this invention. It is a figure which shows the arrangement|positioning of the heating foam material in the fire door which concerns on one Embodiment of this invention. It is a figure which shows the arrangement|positioning of the heating foam material in the fire door which concerns on one Embodiment of this invention. It is a figure which shows the arrangement|positioning of the heating foam material in the fire door which concerns on one Embodiment of this invention. It is a figure which shows the arrangement|positioning of the heating foam material in the fire door which concerns on one Embodiment of this invention. It is a figure which shows the arrangement|positioning of the heating foam material in the fire door which concerns on one Embodiment of this invention. It is a figure which shows the arrangement|positioning of the heating foam material in the fire door which concerns on one Embodiment of this invention. It is a figure which shows the arrangement|positioning of the heating foam material in the fire door which concerns on one Embodiment of this invention. It is a figure which shows the arrangement|positioning of the heating foam material in the fire door which concerns on one Embodiment of this invention. It is a figure which shows the arrangement|positioning of the heating foam material in the fire door which concerns on one Embodiment of this invention. It is a figure which shows the arrangement|positioning of the heating foam material in the fire door which concerns on one Embodiment of this invention. It is a figure which shows the arrangement|positioning of the heating foam material in the fire door which concerns on one Embodiment of this invention. It is a figure which shows the arrangement|positioning of the heating foam material in the fire door which concerns on one Embodiment of this invention. It is a figure which shows the arrangement|positioning of the heating foam material in the fire door which concerns on one Embodiment of this invention. It is a figure which shows the arrangement|positioning of the heating foam material in the fire door which concerns on one Embodiment of this invention. It is a figure which shows the arrangement|positioning of the heating foam material in the fire door which concerns on one Embodiment of this invention. It is a figure which shows the arrangement|positioning of the heating foam material in the fire door which concerns on one Embodiment of this invention. It is a figure which shows the arrangement|positioning of the heating foam material in the fire door which concerns on one Embodiment of this invention. It is a figure which shows the arrangement|positioning of the heating foam material in the fire door which concerns on one Embodiment of this invention. It is a figure which shows the arrangement|positioning of the heating foam material in the fire door which concerns on one Embodiment of this invention. 4 is a graph showing wear test results of materials according to examples and comparative examples of the present invention. 4 is a graph showing wear test results of materials according to examples of the present invention.

An example of an embodiment of the present invention will be described below, but the present invention is not limited to this.

FIG. 1 is a diagram showing a fire door 10 of this embodiment. FIG. 2 is a longitudinal sectional view of the fire door 10 of this embodiment.
The fire door 10 of this embodiment includes a door roller 1 , a shoji 2 , a rail 3 and a door frame 4 . The door roller 1 is arranged at the lower end of the shoji 2 and on the rail 3, and rolls on the rail 3 as the shoji 2 moves, thereby reducing the friction generated between the shoji 2 and the rail 3. To smoothly open and close a fire door 10. - 特許庁

The shoji 2 has a lower frame 21, an upper frame 22 and two vertical frames 23. - 特許庁The shoji 2 is constructed by assembling four frames so as to surround, for example, a glass plate. In addition, although the vertical cross-sectional view concerning the fire door 10 of this embodiment shown in FIG. 2 shows a single-layer glass door, it may be a double-layer glass door.

In the fire door 10 of the present embodiment, in order to prevent the members from becoming hot and the flame from penetrating through the gaps between the members, a heating foam material is arranged on the surface of each member and between the members. Insulation and flame protection are possible. EP (epoxy resin), PVC (polyvinyl chloride), or the like can be used as the heat foaming material. Generally, EP has a lower foaming temperature than PVC, EP starts foaming at the beginning of a fire, and PVC starts foaming later than EP.

3 and 4 are diagrams showing the door roller 1 and the fixture 24 of this embodiment.
As shown in FIG. 3, the door roller 1 includes two outer ring portions 14, a track portion 15 that connects the two outer ring portions 14, and a rotation shaft that passes through the outer ring portions 14 and the track portion 15. It is configured to have a shaft hole portion 16 that becomes The door roller 1 is rotatably connected to the lower stile 21 arranged at the lower end of the shoji 2 through a mounting fixture 24 having a rotating shaft 25 shown in FIG. It is attached to the shoji 2. The door roller 1 comes into contact with the rail 3 at the track portion 15 and rolls on the rail 3 as the shoji 2 moves, thereby smoothing the movement of the shoji 2. - 特許庁

Note that in the door roller 1 of this embodiment shown in FIG. is not limited to this. For example, the diameter of the raceway portion may be larger than the diameter of the outer ring portion, and the raceway portion may roll in contact with the concave portion of the rail.

FIG. 5 is a diagram schematically showing the configuration of the cross section of the door roller 1 of this embodiment.
The door roller 1 of the present embodiment has a sliding layer 13 containing fluororesin on at least the contact surface with the rail 3, and the sliding layer 13 and the main body 11 with an intermediate layer 12 interposed therebetween. Configured. Although the main body 11 of the present embodiment is made of PPS, the material for the main body is not particularly limited, and POM (polyacetal resin), PEEK (polyetheretherketone), and PPS, which are conventionally used for door rollers, can be used. A resin material such as (polyphenylene sulfide) or the like can be used.

The sliding layer 13 on the surface of the door roller 1 improves the sliding property between the door roller 1 and the rail 3 and reduces the coefficient of friction, thereby reducing wear of the door roller 1 . The sliding layer 13 preferably contains, for example, a fluororesin.
Specifically, the fluororesin acts as a dry slip agent to reduce friction between the door roller 1 and the rail 3 . In addition, fluororesin abrasion powder generated by abrasion is less likely to agglomerate and remains as nano-scale fine particles, making it more difficult to increase the coefficient of friction compared to agglomerated abrasion powder. Further, fine particles of fluororesin abrasion powder are likely to be adsorbed on the resin-made main body 11 or intermediate layer 12, and even after they are worn, they re-adhere to the door rollers and act as a slip agent, thereby maintaining the friction reducing effect.

Further, the intermediate layer 12 prevents the sliding layer 13 from peeling in order to improve the adhesiveness of the sliding layer 13 . The material constituting the intermediate layer 12 is not particularly limited as long as it improves the adhesion between the main body 11 and the sliding layer 13, but if it is acrylic resin or epoxy resin, the adhesion can be reliably improved. .

The sliding layer 13 is not limited as long as it improves the sliding property between the door roller 1 and the rail 3, but preferably contains a fluororesin. Since the fluororesin exhibits good slidability, the coefficient of friction between the door roller 1 and the rail 3 is reduced by applying it to the outer peripheral surface of the door roller 1 . Although the fluororesin is not particularly limited, PTFE and ETFE are preferably used because they exhibit good slip properties.

Moreover, the sliding layer 13 is preferably formed by a baking coating method. For example, high sliding property can be obtained by blending a fluororesin in the door roller 1, but by forming a sliding layer on the outer periphery of the door roller 1 and using the fluororesin only in the worn portion, the door roller 1 can be improved. High lubricity can be obtained with the minimum use of fluororesin while maintaining mechanical strength.

Furthermore, the film thickness of the sliding layer 13 is preferably 10 to 25 μm. Within this range, good wear resistance can be exhibited in the later-described sliding wear test.

Here, PPS is a material having heat resistance, and by using it for a fire door, for example, it is possible to construct a fire door with high heat resistance and high reliability in the event of a fire. In the past, PPS had poor wear resistance and was difficult to apply to heavy fire doors. It is fully applicable to heavy fire doors.

A conventional fire door generally has a structure in which the above-described heated foam material is used as a non-fireproof member. The fire door 10 of the present embodiment is constructed by using a member having high heat resistance depending on the part thereof, and additionally using a heating foam material for heat insulation. As a result, the fireproof performance is more stable, and the amount of heat foaming material used can be reduced compared to the conventional method.

The fire door 10 has a door roller 1 having a sliding layer 13 on the surface, and the parts attached to the parts facing the frame for the upper and lower stiles and the vertical stile such as the swing stop are made of nylon or vinyl chloride or more flame retardant. is used. Furthermore, silicon or CR (chloroprene rubber) with high heat resistance is used for glass sealing materials and gaskets (or seals).

FIG. 6 is a diagram showing the door roller adjustment hole 26 of the fire door 10 of this embodiment.
The above-mentioned heating foam material is arranged between the lower frame and the lower frame or the door roller, where combustible materials tend to accumulate, and prevents the flame from penetrating. In addition, in the vicinity of the door roller adjustment hole 26, which is a through hole, the heating foam material is arranged on the lower frame side where the temperature tends to be higher than that of the vertical frame. Further, the heating foam material arranged on the upper frame is made of a material that is less flammable than the heating foam material arranged on the lower frame.

7A-W are diagrams showing the arrangement of the heating foam material in the fire door 10 of this embodiment.
As shown in FIGS. 7A to 7W, a heating foam material 100 is arranged in each portion 001 to 014 of the fire door 10. As shown in FIG. This makes it difficult for the temperature of the members to rise, and at the same time, prevents penetration of flames, thereby improving the fireproof performance of the fire door 10 . 7A-W will be described in detail below.

7A and 7B, respectively, of double-glazed glass and single-glazed glass door, (a) heating foam installation diagram in door frame part, (b) heating foam installation diagram in shoji part, (c) longitudinal sectional view and (d) It is a cross-sectional view.
7A and 7B, in (c), the outer rectangle represents the door frame 4, and the vertical line in the center of the rectangle represents the boundary position (meeting position) between the two shojis 2 when the fire door 10 is closed. ). The two arrows in the door frame indicate the directions in which the two sliding shojis 2 are opened. Furthermore, in (d), the two rectangles represent the two shojis 2, and the arrows in the shojis 2 represent the directions in which the two shojis 2 are opened. The heating foam material 100 is arranged in the parts 001 to 014 shown in (c) and (d).

Figures 7C-7W are diagrams showing respective portions 001-014 to which the heating foam material 100 shown in Figures 7A and 7B is attached. 7C to 7W are schematic diagrams showing which part of the door frame 4 or shoji 2 each part 001 to 014 is located in (a) and (b) a part of the door frame 4 or shoji 2. 1 shows a top (side) view, a longitudinal (transverse) section and a perspective view of the fitting. Note that the units of the dimensional values shown in the drawings are mm (millimeters). 7I, FIG. 7M, FIG. 7N, FIG. 7T and FIG. 7U, FIG.
Since the two shoji 2 have different shapes depending on whether they are arranged on the indoor side or the outdoor side, the one on the indoor side is referred to as an inner shoji 201 and the one on the outdoor side is referred to as an outer shoji 202 .

The means for attaching the heating foam material 100 is not particularly limited, and it may be attached directly to the door frame 4 or the shoji 2. or by attaching it to the shoji 2, it may be attached indirectly. Alternatively, it may be attached by caulking with the door frame 4, the shoji 2 and other parts.

Table 1 shows the detailed positions of the parts 001 to 014, the material of the heating foam material 100, and the mounting means.

As shown in FIG. 7C, the portion 001 is located at the bottom center of the door frame 4 . By attaching the resin part 0011 to which the heating foaming material 100 is attached to the door frame 4 , the heating foaming material 100 is attached to the part 001 .

As shown in FIG. 7D, the part 002 is positioned on the lower side of the door frame 4, on the inner shoji 201 side. After the heating foam material 100 is attached to the portion 002, it is further pressed and fixed by the parts 0021 and 0022. FIG.

As shown in FIG. 7E, the portion 003 is located at the boundary between the lower frame 21 and the door frame 4 of the outer shoji 202 over the entire length of the lower frame. The heating foam material 100 is crimped and fixed to the lower frame 21 .

As shown in FIGS. 7F and 7K, the portion 004 is located at the boundary between the lower frame 21 of the shoji 2 and the glass. After the heating foam material 100 is attached to the part 004, it is further pressed by the part 0041 and fixed. FIG. 7F shows the attachment position to the outer shoji 202 and FIG. 7K to the inner shoji 201 .

As shown in FIG. 7G, the part 005 is located behind the small opening 0051 of the lower frame 21 of the outer shoji 202 . The heated foam material 100 is attached by gluing.

As shown in FIG. 7H, the portion 006 is located behind the sub-block 0061 of the lower frame 21 of the outer shoji 202 . The heated foam material 100 is attached by gluing.

As shown in FIGS. 7I, 7J, 7J, and 7M, the parts 007 are located at both ends of the lower frame 21 of the shoji 2 . Although the heating foam material 100 is attached by adhesion in this embodiment, it may be further pressed and fixed by the part 0071 and/or the part 0072 . Figures 7I and 7L show attachment positions to the outer shoji 202 and inner shoji 201 in the double-glazed door, and Figures 7J and 7M to the outer shoji 202 and inner shoji 201 in the single-layer glass door. The lower frame 21 in FIGS. 7I and 7M may be arranged on both sides of the heating foam material 100 as shown in FIG. 7(c).

As shown in FIGS. 7N and 7Q, the portion 008 is located at the boundary between the frame 23 on the meeting side of the shoji 2 and the glass. In this embodiment, the heating foam material 100 is attached by adhesion, but it may be fixed by being pressed by the component 0081 . 7N shows the attachment position to the outer shoji 202 and FIG. 7Q to the inner shoji 201. FIG. The vertical frame 23 in FIG. 7N may have a shape as shown in FIG. 7C, for example.

As shown in FIG. 7O, the portion 009 is positioned over the entire length of the smoke return portion of the vertical frame 23 on the meeting side of the outer shoji 202 . The heating foam material 100 is crimped and fixed to the vertical frame 23 .

As shown in FIG. 7P, the part 010 is located under the vertical frame 23 of the outside shoji 202 on the meeting side. The heating foam material 100 is attached to the portion 010 by attaching the part 0101 to which the heating foam material 100 is attached to the vertical frame 23 .

As shown in FIG. 7R, the portion 011 is positioned beside the airtight material of the vertical frame 23 on the meeting side of the inner shoji 201 . The heating foam material 100 is crimped and fixed to the vertical frame 23 .

As shown in FIG. 7S, the part 012 is located beside the airtight material of the vertical frame 23 on the meeting side of the inner shoji 201 . The heating foam material 100 is attached to the portion 010 by attaching the part 0121 to which the heating foam material 100 is attached to the vertical frame 23 .

As shown in FIGS. 7T and 7U, the portion 013 is positioned over the entire length of the vertical frame 23 on the door edge side of the shoji 2 . The heating foam material 100 is crimped and fixed to the vertical frame 23 . The vertical frame 23, which shows the attachment position to the outer shoji 202 in FIG. 7T and to the inner shoji 201 in FIG. 7U, may have a shape as shown in (c) of FIGS.

As shown in FIGS. 7V and 7W, the portion 014 is located below the vertical frame 23 of the shoji 2 on the front side of the door. The heating and foaming material is attached to the portion 014 by attaching the part 0141 to which the heating and foaming material 100 is attached to the vertical frame 23 . FIG. 7V shows the attachment position to the outer shoji 202 and FIG. 7W to the inner shoji 201 .

Moreover, the fire door 10 has a holding metal fitting for preventing the falling of the glass, and the holding metal fitting also contributes to the strength improvement of the door. Furthermore, the detents arranged on the outer and lower frames are U-shaped, so that the heated foam material can be arranged without processing the lower frames.

Hereinafter, the wear resistance of the door roller of the present invention will be described in detail based on examples and comparative examples.

[Abrasion test]
Test pieces made of POM, PEEK, PPS, fluorine-blended PPS, and fluororesin-coated PPS were tested with a reciprocating sliding tester (HEIDON-14 Toku, manufactured by Shinto Kagaku Co., Ltd.) as materials constituting the door rollers of the present invention. A wear test was performed by repeated sliding using a meter (Surfcom 130A, manufactured by Tokyo Seimitsu Co., Ltd.). In addition, the fluororesin-coated PPS was tested by changing the coating film thickness and the presence or absence of the intermediate layer to evaluate the effect of the difference in film thickness on wear resistance.

[Cross-cut test]
For Examples 1 to 4, a cross-cut test was performed based on JIS K 5400 to evaluate the adhesion of the fluororesin coating to door rollers.

The test conditions for the wear resistance test are as follows.
<Test conditions>
Load: 250gf
Speed: 6000mm/min (70cpm)
Stroke: 43mm
Number of times of sliding: 10000 times Mating material: φ10 mm SUJ-2 ball Evaluation: Measure the transition of the coefficient of friction accompanying sliding 10000 times or the number of times until the coefficient of friction rises to 1.0. Also, the wear depth of the test piece after sliding 10,000 times was measured with a surface roughness meter.

<Example 1>
As Example 1, a test piece was prepared by forming an intermediate layer containing an epoxy resin on the surface of PPS, and a sliding layer containing PTFE as a fluorine resin and having a coating thickness of 20 μm on the intermediate layer. Abrasion resistance test was performed by the method of.

<Comparative Example 1>
As Comparative Example 1, a test piece made of POM was prepared and subjected to an abrasion resistance test by the method described above.

<Comparative Example 2>
As Comparative Example 2, a test piece made of PEEK was prepared and subjected to an abrasion resistance test by the method described above.

<Comparative Example 3>
As Comparative Example 3, a test piece made of PPS was prepared and subjected to an abrasion resistance test by the method described above.

<Comparative Example 4>
As Comparative Example 4, a test piece made of fluorine-containing PPS was prepared and subjected to an abrasion resistance test by the method described above.

<Example 2>
As Example 2, a test piece was prepared by changing the coating film thickness of the fluororesin in Example 1 to 10 μm, and the abrasion resistance test was performed by the method described above.

<Example 3>
As Example 3, a test piece was prepared by changing the coating film thickness of the fluororesin in Example 1 to 25 μm, and the abrasion resistance test was performed by the method described above.

<Example 4>
As Example 4, the film thickness of the fluorine resin coating in Example 1 was changed to 20 μm, and a test piece was prepared without forming an intermediate layer, and the wear resistance test was performed by the method described above.

[result]
<Material of Door Roller Example 1, Comparative Examples 1 to 4>
Table 2 shows the number of endurance sliding cycles and wear depth at the end of the test in Example 1 and Comparative Examples 1 to 4. Also, FIG. 8 shows the transition of the coefficient of friction with an increase in the number of times of sliding in each example.

The fluororesin-coated PPS of Example 1 had a greater number of endurance times than the materials of Comparative Examples 1 to 4, and exhibited a moderate change in the increase in the coefficient of friction. In addition, the durability of the PPS of Example 1, Comparative Examples 3 and 4 was 200 times for the PPS not coated with the fluororesin, 8400 times for the PPS containing the fluororesin, and 10000 times for the PPS coated with the fluororesin. The wear resistance of the PPS was greatly improved by the presence of the fluororesin, and in particular, the sliding layer formed by baking coating had a high wear resistance improvement effect.

Also, the PPS compounded with the fluororesin of Comparative Example 4 showed a relatively large number of endurance, but the depth of wear was large. Furthermore, since the increase in the coefficient of friction was gradual, it is considered that the slidability was maintained by scraping the base material.

<Fluorine resin coating film thickness and adhesion Examples 1 to 4>
Table 3 shows the results of wear depth after 20,000 sliding cycles and the presence or absence of peeling after cross-cut test in Examples 1 to 4. Also, FIG. 9 shows the transition of the coefficient of friction with an increase in the number of times of sliding in each example.

Regarding Examples 1 to 3 having an intermediate layer, Example 2, in which the film thickness of the fluororesin was small, had a small effect of improving wear resistance, and was worn deeply. In Example 4, which does not have an intermediate layer, since the base material and the coating film are hard, the wear depth is small and the result is high durability. There is concern about peeling due to the occurrence of collisions, etc. in the manufacturing and transportation processes.

As described above, according to the rotating body of the present invention, by coating the surface of the rotating body with a slipping agent, it is possible to suppress wear and improve the durability of the rotating body.

The present invention is not limited to the above-described embodiments, and improvements and modifications thereof are also included in the present invention.

001 to 014 Heated foam mounting part 100 Heated foam 1 Door roller 11 Main body 12 Intermediate layer 13 Sliding layer 14 Outer ring 15 Track 16 Shaft hole 2 Shoji 21 Lower frame 22 ... Upper frame 23 ... Vertical frame 24 ... Mounting tool 25 ... Rotating shaft part 26 ... Door roller adjustment hole 27 ... Cover 28 ... Fixing tool 201 ... Inner shoji 202 ... Outer shoji 3 ... Rail 4 ... Door frame

Claims (5)

A fire prevention fitting having a rotating body,
The fireproof fitting has a frame and a shoji,
The body of rotation is a body of rotation composed of a main body and a sliding layer on the surface of the main body,
The rotating body is configured to be able to move smoothly by rolling on the tip of a plate-shaped rail provided on the frame that constitutes the contacting object,
The main body has a recess that contacts the tip of the rail when the rotating body moves on the tip of the rail by rolling,
The sliding layer is formed on the surface of the recess ,
The sliding layer is formed between the main body and an intermediate layer,
The main body is composed of a polyetheretherketone or polyphenylene sulfide resin material,
A fitting for fire prevention, wherein the rotating body is a door roller provided on the shoji. The fireproof fitting according to claim 1, wherein the sliding layer contains a fluororesin. The fireproof fitting according to claim 2, wherein the fluororesin is polytetrafluoroethylene or ethylenetetrafluoroethylene. The fire prevention fitting according to any one of claims 1 to 3, wherein the sliding layer is formed at least on a contact surface between the rotating body and the object. The fireproof fitting according to any one of claims 1 to 4 , wherein the intermediate layer is composed of an acrylic resin or an epoxy resin.

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