JPH0968511A - Testing device for combustibility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the measuring accuracy of the combustion time and the combusting length by pinching a test piece by an upper and a lower mounting tool in channel form, furnishing a marker line on the front surface of the upper mounting tool and also on the rear surface of the lower mounting tool, and thereby facilitating observation of the combusting condition on the rear surface of the test piece. SOLUTION: Marker lines A, B are provided on the front surface of an upper mounting tool 1 in a channel form, while marker lines A', B' are provided on the rear surface of a lower mounting tool 2 in channel form. A locating pin 25 furnished on the front surface of the lower tool 2 is inserted in a pin hole 26 furnished in the upper tool 1, and if a test piece 3 is held pinchedly in the state that the mounting tools 1, 2 are located, the markers A, B are positioned identical to the others A', B'. The combustion of the test piece 3 ceases and the mounting tools 1, 2 are take out of a supporting table 4 while the test piece 3 is held unchangedly, and then the combusting length of the test piece 3 is measured. Even though the combustion of the rear surface of the test piece 3 lasts long at this time, accurate measuring can be made by reference to the markers A', B' furnished on the rear of the tool 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a flammability test apparatus.

[0002]

2. Description of the Related Art First, an outline of a flammability test will be described. This test is conducted on interior materials such as a driver's compartment of a vehicle, for example, constituent materials of a seat, a seat belt, a ceiling covering, a door trim, and the like which are fixed to a vehicle body.
This test is stipulated in JIS D1201-1977 “Test method for flammability of organic materials for vehicle interior”. As shown in FIG. 7, the concrete contents are such that a test piece 3 is sandwiched between two upper and lower U-shaped fixtures 1 and 2, and a support base 4 supported by a column 5 is provided as shown in FIG. Then, the burner 6 ignites the end portion of the test piece 3 horizontally.

Then, measurement is started from the time when the ignited test piece 3 spreads and the spread reaches the marked line A, and the time T until the spread of the spread passes the marked line B, or the spread of the marked line When it stops before reaching B, measure the time T until it stops, and remove the test piece 3 from the support base 4 with the test piece 3 sandwiched between the U-shaped fixtures 1 and 2 and remove it from the marked line A. The fire spread length D is measured. As shown in FIG. 10, the length of the fire spread is the length D from the marked line A to the point where the carbonization of the test piece 3 of (a), which is a single material, and is composed of the composite materials 3a and 3b. It is the length D from the marked line A of the test piece of (b) to the place where carbonization stops, and the test piece 3 of (c) melts in a liquid state,
It is the length D from the marked line A to the point where the dripping stopped, and the length D from the marked line A to the point where the melting stopped after the test piece 3 of (d) was melted.

In this test, carbonization, liquefaction, and melting depending on the material of the test piece 3 are collectively called combustion in this test. As shown in FIG. 10, this combustion may stop on the back surface of the test piece 3, and especially when the composite material is the test piece (b), the combustion of the test piece 3a on the front side is caused. Even if it has stopped, there are cases where the combustion of the test piece 3b on the back surface side is still continued, and it is necessary to be careful when measuring the combustion stop time T.

Then, from the measurement result of the time T from the marked line A until the combustion stops and the length D from the marked line A to the place where the combustion stops, the burning velocity B per minute is calculated by the formula (B = 60 ×). D
/ T). The criteria for the judgment are that first, it is best not to burn, then B <100 mm / min, and that the burning of the test piece 3 stops within 60 seconds after reaching the mark A,
In addition, the burned length D of the test piece 3 after reaching the mark A is
The standard is set to be less than 50 mm. In particular, since the time T must be measured in seconds, high-precision measurement is required.

The test environment is 20 ± 5 ° C. and the relative humidity is 65 ±.
It is stipulated that the test should be performed under environmental conditions maintained at 20%. Therefore, as shown in FIG. 9, a support base 4 is installed in the test apparatus 7, and the U-shaped fixtures 1 and 2 holding the test piece 3 are mounted on the support base 4. The test device 7 is installed in a constant temperature and constant humidity tank 8 in order to maintain the test environment.

As shown in FIG. 7, in the conventional U-shaped fixtures 1 and 2, the marked lines A and B are provided only on the upper U-shaped fixture 1. Further, as shown in FIG. 8, index plates 9 and 10 are provided on the side surface of the conventional support so that the reference surfaces 901 and 101 are aligned with the marked lines A and B and protrude toward the upper surface of the support 4. It is provided in. Also,
The conventional support column 5 is a round bar. As shown in FIG. 9, the observation window 11 of the conventional test apparatus is made of heat-resistant glass, and is held in the frame 12 fixed to the test apparatus main body 14 so that the frame 12
It is designed to be inserted and removed from above.

[0008]

In the above-mentioned conventional U-shaped fixture, since the marked lines A and B are provided only on the surface of the upper U-shaped fixture, there are the following problems. As shown in FIG. 10, the test piece often continues to burn on the back side of the test piece even when the combustion on the upper side of the test piece has stopped. Especially, in the case of a composite material such as the test piece of FIG. Therefore, it is necessary to accurately measure the elapsed time T from when the combustion of the test piece reaches the marked line A to when it passes the marked line B in units of seconds. Is present only on the surface of the upper U-shaped fixture, and the thickness t of the test piece is as large as 12 mm. Therefore, the combustion on the back side of the test piece is provided on the surface of the upper U-shaped fixture 1. There is a problem that it becomes difficult to confirm the passage of the line B, the accurate time T cannot be measured, and the combustion speed B with high accuracy cannot be obtained. Further, since the conventional index plate is provided so as to project to the upper surface side of the support base, and it is difficult to observe the combustion state on the back surface of the test piece due to the strut obstructing the same problem, is there.

Since the above description is for the case where the test piece burns until it passes the reference line B, the combustion length D is between the reference lines A and B, but the combustion of the test piece reaches the reference line B. If the combustion length D on the back side of the test piece is longer than that on the other side, the back side of the test piece should be backed with reference to the marked line A provided on the surface of the upper U-shaped fixture. It is difficult to accurately measure the length D to the end of combustion position in millimeters and it is not possible to obtain a highly accurate combustion speed B.

Next, the observation window provided in the test apparatus has the following problems because the heat-resistant glass is vertically inserted into and removed from the frame. In this flammability test, as shown in FIG. 9, the test piece 3 is burned in the test apparatus main body 14 which is a relatively narrow space, so that depending on the material of the test piece 3, smoke or soot is generated and the observation window 11 is exposed. Adhere to. In this test, five identical test pieces are made, and the same test is performed on the five test pieces. Therefore, since the combustion state of the test piece 3 is observed through the observation window 11, the observation window 11 must be constantly cleaned so that the combustion state can be clearly seen.

However, the observation window 13 of the constant temperature and humidity chamber 8
Can be opened only to the position of height L, and the observation window 11 of the test apparatus body 14 is pulled up and removed from the frame 12 of the test apparatus body 14, so that the observation window 11 can be removed. It is extremely difficult and time-consuming, and one test material must be tested as many as five times, so the observation window 11 is frequently cleaned, and even if the observation window 11 is somewhat dirty, it may not be cleaned. .

Further, since the inside of the test apparatus main body 14 is operated in a test environment of a predetermined temperature and humidity, an observation window is provided during the test.
I can't clean by removing 11. Therefore, it becomes difficult to observe when the combustion of the test piece 3 has stopped, and there is a problem that a highly accurate combustion speed B may not be obtained. Further, as shown in FIG. 10, the back surface of the test piece 3 may be burned longer, so it is necessary to bend over and observe the back surface of the test piece 3, and the time T until the burning stops. Must be measured in units of seconds, so there is a time lag in measuring the combustion time T by looking at both sides of the test piece 3, and it is difficult to obtain a highly accurate combustion speed B. is there.

The present invention facilitates the observation of the combustion state on the back surface of the test piece, increases the accuracy of the measurement of the combustion time and the combustion length, and further facilitates the cleaning of the observation window to achieve a highly accurate combustion rate. The present invention provides a flammability test device capable of obtaining

[0014]

Means for solving the above problems are as follows from the description of claim 1 according to the present invention.
A test stand supported by columns is provided in the test equipment kept at a predetermined temperature and humidity, and the test piece is sandwiched between two upper and lower U-shaped fixtures. In a flammability test apparatus in which a fixture is placed on the support base, marked lines A and B are provided on the upper surface of the upper U-shaped fixture and the back surface of the lower U-shaped fixture, respectively. It is characterized by that.

Next, the means grasped from the second aspect of the present invention is to provide a support stand supported by a support in a test device kept at a predetermined temperature and humidity, and to attach two upper and lower U-shaped fixtures. In a flammability test device in which a test piece is sandwiched between and the U-shaped fixture holding the test piece is placed on the support base, the back surface of the support base is placed on the support base. It is characterized in that a marked line B corresponding to the marked line B of the U-shaped fixture is provided.

[0016] Next, the means grasped from the third aspect of the present invention is to provide a support stand supported by a support in a test device kept at a predetermined temperature and humidity, and to attach two upper and lower U-shaped fixtures. In a flammability test device in which a test piece is sandwiched between and the U-shaped fixture holding the test piece is placed on the support base, the upper U-shaped fixture on the side surface of the support base. It is characterized in that index plates protruding from the upper surface side and the lower surface side of the support base are provided so as to match the marked lines A and B provided on the upper surface.

Next, the means grasped from the fourth aspect is to provide a support stand supported by a support in a test apparatus kept at a predetermined temperature and humidity, and to attach two upper and lower U-shaped fixtures. In a flammability test device in which a test piece is sandwiched between and a U-shaped fixture holding the test piece is placed on the support base, the column is a prism, and one side of the prism is a square column. It is characterized in that it matches the marked lines A and B provided on the character-shaped fixture.

Next, the means grasped from the fifth aspect of the present invention is to provide a support stand supported by a support in a test apparatus kept at a predetermined temperature and humidity, and to install two upper and lower U-shaped fixtures. In a flammability test apparatus in which a test piece is sandwiched between and a U-shaped fixture holding the test piece is placed on the support base, the test piece is sandwiched by the U-shaped fixture and placed on the support base. The test piece is provided with a mirror for observing the burning state of the back surface of the test piece.

Next, the means grasped from the sixth aspect is to provide a support stand supported by a support in a test apparatus kept at a predetermined temperature and humidity, and to mount two upper and lower U-shaped fixtures. In a flammability test device in which a test piece is sandwiched between and the U-shaped fixture holding the test piece is placed on the support base, it can be opened and closed with one side of the observation window of the test device as the center of rotation. It is characterized by having done.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the invention grasped from the description of claim 1 will be described. As shown in FIG. 9, a support base 4 supported by a support 5 is provided in a test apparatus main body 14 kept at a predetermined temperature and humidity, and a test is performed between two upper and lower U-shaped fixtures 1 and 2. The piece 3 is held, and the U-shaped fixtures 1 and 2 holding the test piece 3 are placed on the support base 4. Then, as shown in FIG. 1, marked lines A and B are provided on the upper surface of the upper U-shaped fixture 1, and marked lines A ′ and B ′ are provided on the back surface of the lower U-shaped fixture 2. Set up.

Next, an embodiment of the invention grasped from the description of claim 2 will be described. As shown in FIG. 9, a support base 4 supported by a support 5 is provided in a test apparatus main body 14 kept at a predetermined temperature and humidity, and a test is performed between two upper and lower U-shaped fixtures 1 and 2. The piece 3 is held, and the U-shaped fixtures 1 and 2 holding the test piece 3 are placed on the support base 4. Then, as shown in FIG. 2, marking lines A ′ and B ′ are provided on the back surface of the support base 4. These marked lines A'and B'are
As shown in FIG. 8, it is made to coincide with the marked lines A and B of the U-shaped fixture 1 placed on the support 4.

Next, an embodiment of the invention grasped from the description of claim 3 will be described. As shown in FIG. 9, a support base 4 supported by a support 5 is provided in a test apparatus main body 14 kept at a predetermined temperature and humidity, and a test is performed between two upper and lower U-shaped fixtures 1 and 2. The piece 3 is held, and the U-shaped fixtures 1 and 2 holding the test piece 3 are placed on the support base 4. Then, as shown in FIG. 2, the side surfaces of the support base 4 are projected to the upper surface side and the lower surface side of the support base 4 in conformity with the marked lines A and B provided on the upper surface of the upper U-shaped fixture 1. An index plate 15 is provided.

Next, an embodiment of the invention grasped from the description of claim 4 will be described. As shown in FIG. 9, a support base 4 supported by a support 5 is provided in a test apparatus main body 14 kept at a predetermined temperature and humidity, and a test is performed between two upper and lower U-shaped fixtures 1 and 2. The piece 3 is held, and the U-shaped fixtures 1 and 2 holding the test piece 3 are placed on the support base 4. Then, as shown in FIG. 3, the support pillars for supporting the support base 4 are made into prisms 16, and one side surface of the prism 16 is provided on the U-shaped fixture 1 mounted on the support base 4 shown in FIG. Match lines A and B.

Next, an embodiment of the invention grasped from the description of claim 5 will be described. As shown in FIG. 9, a support base 4 supported by a support 5 is provided in a test apparatus main body 14 kept at a predetermined temperature and humidity, and a test is performed between two upper and lower U-shaped fixtures 1 and 2. The piece 3 is held, and the U-shaped fixtures 1 and 2 holding the test piece 3 are placed on the support base 4. Then, as shown in FIG. 5, a mirror 17 for observing the combustion state of the back surface of the test piece 3 which is sandwiched between the U-shaped attachments 1 and 2 and placed on the support base 4 is provided.

Next, an embodiment of the invention grasped from the description of claim 6 will be described. As shown in FIG. 9, a support base 4 supported by a support 5 is provided in a test apparatus main body 14 kept at a predetermined temperature and humidity, and a test is performed between two upper and lower U-shaped fixtures 1 and 2. The piece 3 is held, and the U-shaped fixtures 1 and 2 holding the test piece 3 are placed on the support base 4. Then, as shown in FIG. 4, it can be opened and closed like 18 'with one side of the observation window 18 of the test apparatus body 14 as the center of rotation.
An observation window 18 is provided.

[0026]

EXAMPLE An example of the present invention will be described below. As shown in FIG. 9, the whole test apparatus is provided with a support base 4 supported by a column 5 in a test apparatus main body 14 kept at a predetermined temperature and humidity, and two upper and lower U-shaped fixtures 1, The test piece 3 is sandwiched between the two, and the U-shaped fixtures 1 and 2 sandwiching the test piece 3 are placed on the support base 4. Further, on one side surface of the test apparatus body 14, a door 19 for inserting and removing the upper and lower two U-shaped fixtures 1 and 2 holding the test piece 3 is provided. An ignition door 20 having a burner 21 mounted at a predetermined height is provided on the other side surface of the test apparatus body 14.
Further, an exhaust port 24 for exhausting smoke or gas generated when the test piece 3 burns is provided between the main body side and the openable / closable lid plate 23 provided with the handle 22.

Next, the details of each part of this test apparatus will be described. FIG. 1 is an exploded perspective view of the U-shaped attachments 1 and 2, and the surface of the upper U-shaped attachment 1 is marked with a marked line A.
And B are provided, and marked lines A ′ and B ′ are provided on the back surface of the lower U-shaped fixture 2. Positioning pins 25 are planted on the surface of the lower U-shaped fixture 2, and by inserting the positioning pins 25 into the pin holes 26 provided in the upper U-shaped fixture 1, The test piece 3 is sandwiched with the upper and lower two U-shaped fixtures 1 and 2 positioned. With the upper and lower U-shaped fixtures 1 and 2 thus positioned, the marked line A
And A'and B and B'are in the same position,
Marks A'and B'are provided.

FIG. 2 is a perspective view of the support base 4, and the back surface of the support base 4 is provided with marked lines A'and B '. As shown in FIG. 8, these marked lines A ′ and B ′ are U-shaped mounts in a state where the U-shaped mounts 1 and 2 holding the test piece 3 are placed at predetermined positions of the support base 4. It is provided so as to coincide with the marked lines A and B provided in FIG. In the embodiment shown in FIG. 2, when the U-shaped fixtures 1 and 2 holding the test piece 3 are placed in contact with the stopper 27, the marked lines A ′ and B ′ have U-shaped fixtures. It is designed to match the marked lines A and B provided on No. 1.

Further, in FIG. 2, an index plate 15 is provided on the side surface of the support base 4, and the reference surfaces 151 and 152 of this index plate 15 coincide with the marked lines A'and B '. The index plate 15 is provided so as to project above and below the support base 4. In addition, the column 5 is this indicator plate
It is mounted at a position away from 15 so as not to interfere with the observation of combustion of the test piece 3.

Further, as shown in FIG. 3, the pillar is a prism 16 and one side surface of the prism 16 is provided so as to coincide with the marked lines A'and B '. In this case, the index plates 9 and 10 may project only above the support base 4. As a method of mounting the prism 16, the marked line A ′ is located behind the prism 16 with respect to the combustion direction (arrow X direction) of the test piece 3, and the combustion state of the test piece 3 at the marked line A ′ is determined. It is not obscured by the shadow of the prism 16 to facilitate observation of combustion, and the reference line B'is located in front of the prism 16 so that the reference lines A'and B '.
The combustion state of the test piece 3 between and and the combustion state of the test piece 3 at the marked line B ′ are not hidden by the shadow of the prism 16 to facilitate observation of the combustion state.

FIG. 4 is a perspective view of the test apparatus main body 14. A hinge 28 is provided on the lower side of the observation window 18 so that it can be opened and closed. Further, a magnet whose observation window 18 is attracted to the test apparatus main body 14 may be used to improve the airtightness of the test apparatus main body 14 and maintain the test environment. 29 is a handle. In the present embodiment, the lower side of the observation window 18 is used as the center of rotation, but a hinge 28 may be provided on the side of the observation window 18 so that the center of rotation of the observation window 18 can be used as the side. Since the other parts are the same as those of the test apparatus main body 14 shown in FIG. 9, the same parts are designated by the same reference numerals and the description thereof will be omitted.

In FIG. 5, the observation window 11 of the test apparatus body 14 is shown.
Before (18), a mirror 17 is provided so that the combustion state of the back surface of the test piece 3 can be observed. In this way, the observation window 11 or
By providing the mirror 17 in front of 18, even if the test piece 3 is a material that emits smoke or soot, it does not become dirty. Also this mirror
17 is mounted on a moving carriage 30, and the height can be adjusted by a height adjusting knob 31, and the angle of the mirror 17 can be adjusted by an angle adjusting knob 32.
Thus, the posture of the mirror 17 can be adjusted so that the combustion state on the back surface of the test piece 3 can be most easily observed depending on the posture of the operator. In FIG. 6, a mirror 17 'is installed inside the test apparatus main body 14, and this mirror 17' is of a size such that the burning state of the back surface of the test piece 3 can be confirmed at least in the range of marked lines A to B. ing. This mirror 17 'uses a plate made of heat-resistant glass or stainless steel. In addition, this embodiment is applied to the case where the material of the test piece 3 has a relatively small amount of smoke and soot.

The operation of the embodiment constructed as described above will now be described. In FIG. 1, the marking lines A and B and A'and B'are provided on the front surface of the upper U-shaped fixture 1 and the back surface of the lower U-shaped fixture 2, respectively. Stop and the test piece 3 is clamped, the support 4
When the combustion length D of the test piece 3 is measured by taking out the U-shaped fixtures 1 and 2, even if the combustion on the back surface of the test piece 3 becomes longer as shown in (b) of FIG. , The burning length of which is provided on the back surface of the lower U-shaped fixture 2, marked A '
And B'can be used as a reference for accurate measurement.

Next, in the embodiment shown in FIG. 2, since the marked lines A'and B'are provided on the back surface of the support base 4, for example, when the spread of the back surface of the test piece 3 reaches the marked line A '. The observation becomes easy, the measurement of the time T from that point can be started accurately, and the confirmation of the spread of the back surface of the test piece 3 when it reaches the marked line B ′ is facilitated by the marked line. The time T at which the back surface of the test piece 3 burns from A ′ to B ′ can be accurately measured. In addition, the mirror shown in FIG.
By providing 17 or 17 ', it becomes easier to observe the combustion state on the back surface of the test piece 3, and the time T at the marked line A'is
Can be more reliably started and the measurement of the time T at the marked line B'can be performed more reliably, and even if the combustion on the back surface of the test piece 3 is stopped before reaching the marked line B ', its observation is easy. Therefore, the measurement of the combustion time T can be accurately completed.

Further, by providing the index plate 15 so as to project above and below the support base 4, the operator can set the reference surface 151 or 152 of the index plate 15 provided on both sides from the side surface of the support base 4. It is possible to monitor the burning state of the front and back of the test piece 3 while squeezing. As a result, even if the combustion of the back surface of the test piece 3 progresses from the front side, it is possible to accurately start the measurement of the combustion time T at the marked line A and stop the measurement of the combustion time T at the marked line B. .

Next, as shown in FIG. 3, the pillar is made into a prism 16 and one side surface of this prism 16 is provided so as to coincide with the marked lines A and B, so that the operator is in a position lower than the back surface of the test piece 3. Thus, it is possible to observe the burning of the back surface of the test piece 3 while curving one side surface of the prism 16. As a result, even if the combustion of the back surface of the test piece 3 progresses from the front side, it is possible to accurately start the measurement of the combustion time T at the marked line A and stop the measurement of the combustion time T at the marked line B. Moreover, the prism 16 does not interfere with the measurement.

Next, as shown in FIG. 4, by opening and closing one side of the observation window 18 of the test apparatus main body 14 as the center of rotation, the following action is obtained. In FIG. 9, even if the observation window 13 of the constant temperature and humidity chamber 8 is opened only up to the height L, the observation window 18 of the test apparatus body 14 can be opened like 18 '. Thereby, the heat-resistant glass of the observation window 18 can be easily cleaned, and the test piece 3 in the test apparatus body 14 can be easily cleaned.
The combustion state of is clearly visible, and the observation can be performed accurately.

Further, each time one flammability test is completed,
Although the door 19 and the ignition door 20 are opened to ventilate the inside of the test apparatus main body 14, the observation window 18 is also opened by facilitating the opening and closing of the observation window 18, so that the test apparatus main body 14 can be quickly opened.
Ventilation inside can be done. Moreover, since the observation window 18 can be easily opened and closed, the U-shaped fixtures 1 and 2 holding the test piece 3 can be placed on the support base 4 by opening the observation window 18, The efficiency can be improved.

[0039]

As described above in detail, according to the present invention, which can be understood from the detailed description of the invention based on the description of claim 1, the upper surface and the lower surface of the upper U-shaped fitting of the flammability test apparatus are described. On each side of the U-shaped fixture on the side
Since B, A ′, and B ′ are provided so that the burning length on the back surface of the test piece can be accurately measured, a highly accurate burning rate can be obtained.

Next, according to the present invention, which can be understood from the detailed description of the invention based on the description of claim 2, on the back surface of the support base of the flammability test apparatus, the coil mounted on the support base is provided. The markings A'and B'corresponding to the markings A and B of the U-shaped fixture are provided to facilitate the confirmation when the combustion on the back surface of the test piece reaches the markings A'and B ', and to perform the test. Since the time at which the back surface of one piece burns can be accurately measured, a highly accurate burning speed can be obtained.

Next, according to the present invention, which is understood from the detailed description of the invention based on the third aspect, the side surface of the support base of the flammability test apparatus is provided on the upper surface of the upper U-shaped fitting. Since the indicator plates protruding to the upper surface side and the lower surface side of the support base are provided in conformity with the marked lines A and B provided, the operator can monitor the combustion state of the front and back sides of the test piece. Even if the combustion on the back side of the test piece progresses from the front side, the measurement of the combustion time T at the marked line A and the stop of the measurement of the combustion time T at the marked line B can be accurately performed, which is highly accurate. The burning rate can be obtained.

Next, according to the present invention, which can be understood from the detailed description of the invention based on the description of claim 4, the pillar of the flammability test apparatus is a prism, and one side surface of the prism is attached in a U-shape. By aligning with the marked lines A and B provided on the tool so that the operator can observe the combustion on the back surface of the test piece, even if the combustion on the back surface of the test piece progresses from the front side, Since it is possible to accurately start the measurement of the combustion time T on the marked line A and stop the measurement of the combustion time T on the marked line B, it is possible to obtain a highly accurate burning velocity.

Next, according to the present invention, which is understood from the detailed description of the invention based on the fifth aspect, it is clamped by the U-shaped fitting of the flammability test apparatus and placed on the support base. The mirror that can observe the burning state of the back side of the test piece is installed,
It is easier to observe the combustion state on the back surface of the test piece, and the marked line A
It is possible to more reliably start the measurement of the time T at the time point T and the measurement end of the time T at the reference line B. Even if the combustion on the back surface of the test piece is stopped before reaching the reference line B, its observation is easy. Since the measurement of the combustion time T can be completed accurately, a highly accurate combustion speed can be obtained.

Next, according to the present invention, which is understood from the detailed description of the invention based on the description of claim 6, the observation window of the flammability test apparatus can be opened and closed with one side of the observation window as a rotation center. Since the heat-resistant glass can be easily cleaned so that the combustion state of the test piece in the main body of the test apparatus can be clearly seen and the observation can be performed accurately, a highly accurate combustion rate can be obtained.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a U-shaped attachment according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a support base according to an embodiment of the present invention.

FIG. 3 is a perspective view showing a support base according to an embodiment of the present invention.

FIG. 4 is a perspective view showing a test apparatus main body according to an embodiment of the present invention.

FIG. 5 is a side view of the test apparatus main body according to the embodiment of the present invention.

FIG. 6 is a side view of the test apparatus main body according to the embodiment of the present invention.

FIG. 7 is an assembled exploded perspective view of a conventional U-shaped attachment tool.

FIG. 8 is a perspective view of a conventional support base.

FIG. 9 is a perspective view of a conventional test apparatus body.

FIG. 10 is an explanatory diagram showing a vertical cross-section of a combustion state of a test piece.

[Description of sign]

 1 U-shaped mounting fixture 2 U-shaped mounting fixture 3 Test piece 4 Support base 5 Strut 6 Burner 7 Testing device 8 Constant temperature and humidity chamber 9 Index plate 901 Reference surface 10 Index plate 101 Reference surface 11 Observation window 12 Frame 13 Observation window 14 Test device body 15 Indicator plate 16 Prismatic prism 17 Mirror 18 Observation window 19 Door 20 Ignition door 21 Burner 22 Handle 23 Lid plate 24 Exhaust port 25 Positioning pin 26 Pin hole 27 Stopper 28 Hinge 29 Handle 30 Moving carriage 31 Height adjustment knob 32 Mirror angle adjustment knob

Claims (6)

[Claims] 1. A test stand, which is supported by a support, is provided in a test apparatus kept at a predetermined temperature and humidity, and a test piece is sandwiched between two upper and lower U-shaped fixtures. In the flammability test apparatus in which the sandwiched U-shaped fixture is placed on the support base, the marked lines are provided on the upper surface of the upper U-shaped fixture and the back surface of the lower U-shaped fixture. A flammability test apparatus having A and B. 2. A test stand, which is supported by a support, is provided in a test device kept at a predetermined temperature and humidity, and a test piece is sandwiched between two upper and lower U-shaped fixtures. In a flammability test apparatus in which the sandwiched U-shaped fixture is placed on the support base, on the back surface of the support base, the marked lines A'and B of the U-shape fixture mounted on the support base are provided. A flammability test device characterized by being provided with marked lines A and B which coincide with ‘ 3. A test stand, which is supported by a support, is provided in a test device kept at a predetermined temperature and humidity, and a test piece is sandwiched between two upper and lower U-shaped fixtures. In the flammability test device in which the sandwiched U-shaped fixture is placed on the support base, the side faces of the support base are aligned with the marked lines A and B provided on the upper surface of the upper U-shape fixture. And a flammability test device, which is provided with index plates projecting on the upper surface side and the lower surface side of the support base. 4. A test stand, which is supported by a support, is provided in a test apparatus kept at a predetermined temperature and humidity, and a test piece is sandwiched between two upper and lower U-shaped fixtures. In a flammability test device in which a sandwiched U-shaped fixture is placed on the support base, the pillar is a prism, and one side surface of the prism corresponds to the marked lines A and B provided on the U-shaped fixture. The flammability test device according to claim 1, 2 or 3, wherein 5. A test stand, which is supported by a support, is provided in a test device kept at a predetermined temperature and humidity, and a test piece is sandwiched between two upper and lower U-shaped fixtures. In the flammability test device in which the sandwiched U-shaped fixture is placed on the support, the combustion state of the back surface of the test piece sandwiched by the U-shaped fixture and placed on the support can be observed. The flammability test device according to claim 1, 2, 3, or 4, wherein a transparent mirror is provided. 6. A test stand, which is supported by a column, is provided in a test apparatus kept at a predetermined temperature and humidity, and a test piece is sandwiched between two upper and lower U-shaped fixtures. 2. A flammability test apparatus in which a sandwiched U-shaped fixture is placed on the support table, which can be opened and closed with one side of an observation window of the test apparatus as a rotation center.
The flammability test device according to 2, 3, 4 or 5.