JPH1089623A - Wick for combustion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wick for a combustion device in which some advantages of employing non-woven fabric as a lower part of the wick are retained and advantages thereof are eliminated, which are produced as uniform products having a stable size and a shape without variation in quality, and which can suck up petroleum smoothly and uniformly. SOLUTION: In a wick for a combustion device provided with a lower wick F and an upper wick G, the lower wick F is composed of non-woven fabric 1 having a fuel sucking characteristic and the upper wick G is composed by a first knitted cloth 8 such that glass fiber threads are applied as first warps 2, cotton threads are applied as second warp threads 3, each of the first warp threads 2 and the second warp threads 3 is repeatedly folded back to cause a first folded-back section 4 of the first warp threads 2 and a second folded-back section 5 of the second warp threads 3 to be overlapped to each other to arrange an overlapped section 6 and at the same time there are provided overlapped sections 6, the first warp threads 2 and the second warp threads 3 are knitted in chain form together with several warp threads 7, 7..., and then the upper edge 9 of the non-woven fabric 1 and the lower edge 10 form with the cotton threads of the first knitted cloth 8 being applied as the second warp threads 3 are abutted to each other and connected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core for a burning appliance such as a petroleum stove, a petroleum stove or the like which mainly uses kerosene as a fuel.

[0002]

2. Description of the Related Art Conventionally, a nonwoven fabric is used as a core for a burning appliance as a flat plate as shown in FIG. 20 or as a cylinder as shown in FIG. Are known (see Japanese Patent Publication No. 2-53685).

[0003]

[Problems to be solved by the invention] By the way, FIG.
The fuel suction part 50 below the burner wick shown in FIG.
A nonwoven fabric is used, and a heat-resistant combustor 51 is integrally connected to the upper portion. The nonwoven fabric used for the fuel suction portion 50 can be produced in a wider width than a cotton fabric formed by using a small width loom, and can be cut. Since the part does not fray and can be cut into free shapes and dimensions, it has great advantages such as standardization of materials, but non-woven fabric has too good suction performance, so excess fuel is It accumulates and forms tar, which worsens the fire during ignition and generates odor.It also shortens the life of the wick. However, there are disadvantages such as that the synthetic fibers constituting the above-mentioned compound are melted by heat and become in a dangerous state for fire prevention.

The present invention has been made to solve the above-mentioned problems, and while leaving the advantage of using a non-woven fabric for the lower core portion, it is possible to obtain a uniform product having stable dimensions and shapes by eliminating the disadvantages. It is an object of the present invention to obtain a wick for a burning appliance which is convenient to use, such as being able to smoothly and uniformly suck oil without unevenness and being provided at a low cost.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a wick for a combustion apparatus having a lower core portion F and an upper core portion G. The upper core portion G is made of a glass fiber yarn as the first weft 2 and a cotton yarn as the second weft 3, and the first and second wefts 2 and 3 are repeatedly folded back to form the first core G. The first folded portion 4 of the weft 2 and the second folded portion 5 of the second weft 2 overlap each other to provide a double contact portion 6 and include the double contact portion 6 to form the first weft 2 and the second weft 3 into several pieces. Are constituted by a first knitted fabric 8 formed by chain-knitting the warp yarns 7, 7,..., And a lower end edge 10 formed by forming the upper edge 9 of the nonwoven fabric 1 and the cotton yarn of the first knitted fabric 8 as the second weft 3 Are connected with each other.

[0006] The upper core portion G is made of a glass fiber yarn as first weft yarns 2 and 2 and a cotton yarn as second weft yarns 3 and 3, respectively.
The weft yarns 2 and 2 and the second weft yarns 3 and 3 are repeatedly folded back and forth with a reinforcing core 11 interposed between the first and second weft yarns 2 and 2.
The folded portions 4 and 4 and the second folded portions 5 and 5 of the second wefts 2 and 2 overlap each other to provide overlapping portions 6 and 6 and include the overlapping portions 6 and 6 and the first wefts 2 and 2 and the second weft 2. A second knitted fabric 12 formed by weaving the warp yarns 3, 3 with several warp yarns 7, 7,.
It consists of.

The upper core portion G is made of a plurality of third wefts 13 using glass fiber yarns and a plurality of fourth wefts 14 using cotton yarns.
And the third and fourth wefts 13 and 14 respectively.
.. Are repeatedly turned, and the third weft 13 is a first upper folded portion 15 and a first lower folded portion 16, and the fourth weft 14 is a second upper folded portion 17 and a second lower folded portion 18. Are provided separately in upper and lower steps, and furthermore, a first upper folded portion 15 provided in the third weft 13... And a second upper folded portion 17 and a third weft 13 provided in the fourth weft 14. , The first lower folded portion 16 and the fourth weft 1
.. Are provided so as to overlap the second lower folded portions 18 provided at the four contact portions 6, 6,.
, And a third knitted cloth 19 formed by chain-knitting several warp yarns 7, 7,.

The upper core portion G is made of a plurality of third wefts 13 using a glass fiber yarn and a plurality of fourth wefts 14 using a cotton yarn.
And the third and fourth wefts 13 and 14 respectively.
··· Repeatedly fold as a double front and back with a reinforcing core 11 interposed between the first and second wefts 13.
5 and the first lower folded portion 16 and the fourth weft 14 ...
A second upper folded portion 17 and a second lower folded portion 18 are provided separately at upper and lower steps, respectively.
··· the first upper folded portion 15 and the fourth weft 14 ···
The second upper folded portion 17 and the third weft 13 provided in the.
, The first lower folded portion 16 provided on the fourth weft 14 and the second lower folded portion 18 provided on the fourth weft 14. , And a fourth knitted fabric 20 formed by chain-knitting several warp yarns 7, 7,.

The longitudinal non-woven fabric 1 forming the lower core portion F is provided with a number of vertically long slits 21, 21.
The bent portion 22 is formed.

Also, a large number of vertical slits 23, 23... Are provided in the upper portion of the nonwoven fabric 1 constituting the lower core portion F to form the second bent portion 24, and several cut portions 25 are provided in the lower portion. The crotch split portion 26 is formed.

Further, the nonwoven fabric 1 constituting the lower core portion F is formed by uniformly opening a non-twisted tow so that the long fibers 27 are aligned substantially linearly in parallel in the same direction of the fuel sucking direction. A long fiber fabric is laminated to form a long fiber layer 28,
The long fiber layer 28 is laminated so that the short fiber web layer 29 becomes both outer layers, and the outer surfaces of both outer layers are made smooth to be integrated so that the long fiber layer 28 and the short fiber web layer 29 do not peel off. It was formed.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 to 19. In a wick for a combustion appliance having a lower core portion F and an upper core portion G, the lower core portion F has a fuel wicking property. The upper core portion G is made of a nonwoven fabric 1, and the first and second wefts 2 and 3 are appropriately formed with a warp knitting machine by using a glass fiber yarn as a first weft 2 and a cotton yarn as a second weft 3. The first folded portion 4 of the first weft 2 and the second folded portion 5 of the second weft 2 are repeatedly contacted to form a double contact portion 6 and the first weft 2 and the second weft 3 including the double contact portion 6. Are composed of a first knitted fabric 8 formed by chain-knitting several warp yarns 7, 7,..., And the upper edge 9 of the nonwoven fabric 1 and the cotton yarn of the first knitted fabric 8 are used as the second weft yarn 3. The formed lower edge 10 is butt-connected (FIG. 1, FIG. 2, FIG. 4, FIG. 5, FIG. 6, FIG. 7, FIG. 13, FIG.
16, 17, 18, and 19).

In the wick for a combustion appliance having a lower core portion F and an upper core portion G, the lower core portion F is made of a nonwoven fabric 1 having a fuel wicking property, and the upper core portion G is made of glass fiber. The first and second wefts 2 and 2 and the third and third wefts 3 and 3 are used as reinforcing cores 11 respectively.
The first and second folded portions 4 and 4 of the first and second wefts 2 and 2 are overlapped by the warp knitting machine. Contact part 6,
6 and a second knitted cloth 12 including the overlapping portions 6 and 6, the first weft 2, 2 and the second weft 3, 3 are formed by chain-knitting several warps 7, 7,... The upper edge 9 of the nonwoven fabric 1 and the lower edge 10 formed by forming the cotton yarn of the second knitted fabric 12 as the second weft 3 are butt-connected (FIGS. 1, 3, 4, and 5). 5, FIG. 6, FIG. 7, FIG. 14, FIG.
5, FIG. 16, FIG. 17, FIG. 18, FIG. 19).

In the wick for a combustion appliance having a lower core portion F and an upper core portion G, the lower core portion F is made of a nonwoven fabric 1 having a fuel wicking property, and the upper core portion G is made of glass fiber. Each of the third weft 13 and the fourth weft 14 is repeated by a warp knitting machine, with the yarn being a plurality of third wefts 13... And the cotton yarn being a plurality of fourth wefts 14. Turned back, third weft 1
.., A first upper folded portion 15 and a first lower folded portion 16, and a fourth weft 14.
And the second lower folds 18 are provided separately at upper and lower steps, respectively, and the first upper fold 15 provided on the third weft 13 and the second upper fold provided on the fourth weft 14. , And the first lower folded portion 16 provided on the third weft 13 and the second lower folded portion 18 provided on the fourth weft 14. . And the third weft 13 and the fourth weft 13 ...
Are composed of a third knitted fabric 19 formed by chain-knitting several warp yarns 7, 7,..., And the upper edge 9 of the nonwoven fabric 1 and the cotton yarn of the third knitted fabric 19 are formed. The lower edges 10 formed as the fourth wefts 14 are connected by butt connection (FIGS. 4, 6, 8, 9, 11, 12, and 1).
3, FIG. 15, FIG. 16, FIG. 17, FIG. 18, FIG. 19).

[0015] In the wick for a combustion appliance having a lower core portion F and an upper core portion G, the lower core portion F is made of a nonwoven fabric 1 having a fuel-wicking property, and the upper core portion G is made of glass fiber. The yarn is a plurality of third wefts 13..., And the cotton yarn is a plurality of fourth wefts 14. Are repeatedly folded back and forth with a warp knitting machine, and the first upper folded portion 15 and the first lower folded portion 16 for the third weft 13 and the second upper folded portion for the fourth weft 14. 17 and a second lower folded portion 18 are provided separately in upper and lower steps, and furthermore, a first upper folded portion 15 provided in the third weft 13 and a second upper provided in the fourth weft 14. The first lower folded portion 16 and the fourth wefts 14 provided on the folded portion 17 and the third wefts 13. Third weft 13 comprises a heavy contact portion 6,6, ... with a respective second lower folded portion 18 which is provided by the heavy contact provided heavy contact portion 6,6 ... ... and the fourth weft 14
Are composed of a fourth knitted fabric 20 formed by chain-knitting several warp yarns 7, 7,..., And the upper edge 9 of the nonwoven fabric 1 and the cotton yarn of the fourth knitted fabric 20 are fourth wefts 14 are formed by butt-connecting lower end edges 10 formed as 14... (FIG. 1, FIG. 2, FIG. 4, FIG. 5, FIG. 6, FIG. 7, FIG. 11, FIG.
14, 15, 16, and 17).

A large number of vertically long slits 21, 21,...
A bent portion 22 is formed (FIGS. 4, 5, and 1).
1, FIG. 15, FIG. 18).

Also, a large number of vertical slits 23 are provided in the upper portion of the nonwoven fabric 1 constituting the lower core portion F to form the second bent portion 24, and several cut portions 25 are provided in the lower portion. In this case, several crotch portions 26 are formed (FIG. 6,
7, 12, 17, and 19).

Further, the nonwoven fabric 1 constituting the lower core portion F is formed by uniformly opening a non-twisted tow so that the long fibers 27 are aligned substantially linearly in parallel in the same direction as the fuel sucking direction. A long fiber fabric is laminated to form a long fiber layer 28,
The long fiber layer 28 is laminated so that the short fiber web layer 29 becomes both outer layers, and the outer surfaces of both outer layers are made smooth to be integrated so that the long fiber layer 28 and the short fiber web layer 29 do not peel off. (See FIGS. 15, 16, and 17).

In the figure, reference numeral 30 denotes a reinforcing tape.

[0020]

According to the present invention, the following functions and effects can be obtained by the above-described structure.

1 The first knitted fabric 8, the second knitted fabric 12, the third knitted fabric 19, and the fourth knitted fabric 20 having the upper core G formed thereon are made of glass, and the first weft 2 and the third weft 13 located at the top are made of glass. Since the fuel wetting suppression core made of cotton and the second weft 3 and the fourth weft 14 is provided between the heat-resistant core made of fiber yarn and the non-woven fabric 1 having fuel sucking property and having the lower core F formed thereon, the upper part is formed. The distance between the heat-resistant core portion of the core portion G and the non-woven fabric 1 of the lower core portion F becomes longer, and the non-woven fabric 1 is detached from the upper portion of the core guide tube, which becomes particularly high during abnormal combustion. Is not melted by heat and is extremely safe for fire prevention.

2 Since a portion of the cotton yarn having a lower wicking performance than the nonwoven fabric 1 is provided, this portion has a negative effect on wicking, and is adjusted to an appropriate wicking performance. Can prevent the formation of tar, improve the fire around ignition, and extend the life of the core.

3 In providing the portion made of cotton yarn and the portion made of glass fiber yarn of the heat-resistant portion, the first knitted fabric 8
The first weft 2 and the second weft 3 are repeatedly folded by using the glass fiber yarn as the first weft 2 and the cotton yarn as the second weft 3, and the first folded portion 4 of the first weft 2 and the second weft 2 Second
The folded portion 5 is overlapped to form the overlapping portion 6, and the first weft 2 and the second weft 3 including the overlapping portion 6 are several warp yarns 7,7.
Are formed by chain knitting, and the second knitted fabric 12 is formed of the first weft yarns 2 and 2 with the glass fiber yarns and the second weft yarns 3 and 3 with the cotton yarns. The two wefts 3, 3 are repeatedly folded back and forth with a reinforcing core 11 interposed therebetween, and the first folded portions 4, 4 of the first wefts 2, 2 and the second folded portions 5, 5 of the second wefts 2, 2. And the first and second wefts 2 and 2 and the second weft 3,
Are formed by chain-knitting several warp yarns 7, 7,..., And the third knitted fabric 19 is made of a plurality of third weft yarns 13.
.. And the cotton yarn is a plurality of fourth wefts 14..., And each of the third wefts 13... And the fourth wefts 14. The second upper folded portion 17 and the second lower folded portion 18 are separately provided in the upper portion 15 and the first lower folded portion 16 and the fourth weft 14. , The second upper folded portion 17 provided on the fourth weft 14, the first lower folded portion 16 provided on the third weft 13, and the fourth weft 14. Each of the second lower folded portions 18 provided at the first and second contact portions 6 and 6
Are provided and the third weft 13 ... and the fourth weft 14 ... are included in the warp 7,
7 are formed by chain knitting, and further, the fourth knitted fabric 20 is
The glass fiber yarn is a plurality of third wefts 13... And the cotton yarn is a plurality of fourth wefts 14.
··· and fourth wefts 14 ··· intervening reinforcement core 11 and double-turned and folded back and forth, and third wefts 13 ···
, The first upper folded portion 15 and the first lower folded portion 16 and the fourth weft 14... The second upper folded portion 17 and the second
The first folded portion 15 provided on the third wefts 13...
, A second upper folded portion 17 provided on the fourth weft 14, a first lower folded portion 16 provided on the third weft 13, and a second lower folded portion provided on the fourth weft 14. 18 are provided in contact with each other, and the third weft 13 ... and the fourth weft 14 including the contact parts 6, 6 ... are provided.
Are formed by chain-knitting several warp yarns 7, 7,..., And a portion made of a cotton yarn and a portion made of a glass fiber yarn of a heat-resistant portion are simultaneously formed by a warp knitting machine. And the heat-resistant portion made of glass fiber yarn are superposed at the contact portions 6, 6,... To smoothly supply the fuel from the cotton yarn portion to the glass fiber yarn portion. It can be manufactured without any need for a splicing step separately between the portion made of cotton yarn and the portion made of glass fiber yarn, and can be manufactured without unevenness in the product.

4. The first bent portion 22 is formed by providing a large number of vertically long slits 21, 21,... In the vertical direction of the nonwoven fabric 1 constituting the lower core portion F of the first embodiment. A large number of vertical slits 23, 23... Are provided in the upper portion of the nonwoven fabric 1 constituting the core portion F to form the second bent portion 24, and several notches 25 are provided in the lower portion to form the crotch portion 26. Depending on the model, the one provided with the lower core F of the first embodiment or the one provided with the lower core F of the second embodiment is used. .., The vertical slits 23, 23.
..The notch 25 does not require a special process such as gluing to prevent fraying, unlike a conventional cotton knitted fabric formed with a fuel suction portion, shortening the production process and increasing efficiency. It can be provided at low cost.

5. The nonwoven fabric 1 constituting the lower core portion F is formed by uniformly opening a non-twisted tow so that the long fibers 27 are aligned in a substantially straight line in parallel in the same direction of the fuel sucking direction. Forming a long fiber layer 28 by laminating fiber fabrics,
The long fiber layer 28 is laminated so that the short fiber web layer 29 becomes both outer layers, and the outer surfaces of both outer layers are made smooth to be integrated so that the long fiber layer 28 and the short fiber web layer 29 do not peel off. As a result, a large number of uniformly fine capillaries are formed in a substantially straight line, and the fuel is sufficiently and quickly sucked up to increase the combustion efficiency. For this reason,
The whole oil stove can be made compact.
In addition, the long fiber layer 28 is laminated so that the short fiber web layer 29 becomes both outer layers, and the outer surfaces of both outer layers are made smooth so that the long fiber layer 28 and the short fiber web layer 29 are integrated so as not to be separated. It has no irregularities like a woven fabric, eliminates oil leakage, and has a smooth up and down movement of the core, and can withstand long-term use.

6 Since a portion of the cotton yarn having a lower wicking performance than the nonwoven fabric is provided, this portion has a negative effect on wicking, and is adjusted to an appropriate wicking performance. Prevention, improve the fire around ignition and extend the life of the core.
In addition, in newly providing a cotton thread portion in this manner, there is an effect that the cotton yarn portion can be efficiently performed without increasing the joining process.

(7) Since a portion of the cotton yarn having a lower suction performance than the nonwoven fabric is provided, this portion has a negative effect on the suction, so that a suitable suction performance is adjusted and the fuel is suctioned according to the model. It is possible to maintain a suitable fuel.

[Brief description of the drawings]

FIG. 1 is a cutaway surface view of a first knitted fabric and a second knitted fabric.

FIG. 2 is an enlarged partial cutaway surface view of a first knitted fabric.

FIG. 3 is a partially cutaway enlarged surface view of a second knitted fabric.

FIG. 4 is a cutaway surface view showing a first embodiment of a nonwoven fabric constituting a lower core portion.

FIG. 5 is a cutaway surface view showing the first embodiment of the present invention.

FIG. 6 is a cutaway surface view showing a second embodiment of the nonwoven fabric constituting the lower core.

FIG. 7 is a cutaway surface view showing a second embodiment of the present invention.

FIG. 8 is a cutaway surface view of a third knitted fabric and a fourth knitted fabric.

FIG. 9 is an enlarged partial cutaway surface view of a third knitted fabric.

FIG. 10 is an enlarged partial cutaway surface view of a fourth knitted fabric.

FIG. 11 is a cutaway surface view showing a third embodiment of the present invention.

FIG. 12 is a cutaway surface view showing a fourth embodiment of the present invention.

FIG. 13 is a partially cut-away enlarged cross-sectional view of a first knitted fabric and a third knitted fabric.

FIG. 14 is a partially cut-away enlarged cross-sectional view of a second knitted fabric and a third knitted fabric.

FIG. 15 is a cutaway surface view showing a third embodiment of the nonwoven fabric constituting the lower core.

FIG. 16 is a sectional view taken along the line AA in FIG.

FIG. 17 is a cutaway surface view showing a fourth embodiment of the nonwoven fabric constituting the lower core.

FIG. 18 is a partially cutaway perspective view showing a cylindrical first embodiment of the present invention.

FIG. 19 is a partially cutaway perspective view showing a second embodiment of the present invention having a cylindrical shape.

FIG. 20 is an explanatory diagram of a conventional example.

FIG. 21 is an explanatory diagram of a conventional example.

[Name of code]

 DESCRIPTION OF SYMBOLS 1 Nonwoven fabric 2 1st weft 3 2nd weft 4 1st folded part 5 2nd folded part 6 Double contact part 7 Warp 8 First knitted cloth 9 Upper edge 10 Lower edge 11 Reinforcement core 12 Second knitted cloth 13 Third weft 14 Fourth weft 15 First upper folded part 16 First lower folded part 17 Second upper folded part 18 Second lower folded part 19 Third knitted cloth 20 Fourth knitted cloth 21 Vertical slit 22 First bent part 23 Slit 24 First 2 bent portion 25 cut portion 26 crotch portion 27 long fiber 28 long fiber layer 29 short fiber web layer 30 reinforcing tape

Continuation of the front page (72) Inventor Shuichi Hiramatsu 2-7-15 Kita Kamei-cho, Yao-shi, Osaka Inside Silver Co., Ltd.

Claims (7)

[Claims] 1. A combustion appliance core having a lower core portion F and an upper core portion G, wherein the lower core portion F is made of a nonwoven fabric 1 having a fuel-wicking property, and the upper core portion G is made of glass fiber. The first weft 2 and the second weft 3 are repeatedly folded back, and the first weft 2 and the second weft 2 are respectively folded back and forth. The first knitted portion is formed by superposing the superposed portion 5 to form the superposed portion 6, and including the superposed portion 6 and chain knitting the first weft 2 and the second weft 3 with several warps 7, 7,. The upper end edge 9 of the non-woven fabric 1 and the cotton yarn of the first knitted fabric 8
A core for a combustion appliance, wherein lower ends 10 formed as wefts 3 are butt-connected. 2. A core for a combustion appliance having a lower core portion F and an upper core portion G, wherein the lower core portion F is made of a nonwoven fabric 1 having a fuel-wicking property, and the upper core portion G is made of glass fiber. The first and second wefts 2, 2 and 2 are used as the first and second wefts 3, 2, respectively.
The wefts 3 and 3 are repeatedly folded back and forth as a double front and back with a reinforcing core 11 interposed therebetween, and the first folded portions 4 and 4 of the first wefts 2 and 2 are repeated.
And the second folded portions 5 and 5 of the second wefts 2 and 2 are provided with the overlapping portions 6 and 6 and the first wefts 2 and 2 and the second wefts 3 and 3 including the overlapping portions 6 and 6 are provided. Are formed by chain knitting several warp yarns 7, 7,..., And the upper edge 9 of the nonwoven fabric 1 and the cotton yarn of the second knitted fabric 12 are second weft yarns 3, 3. A wick for a combustion appliance, wherein a lower edge 10 formed as a butt is connected by butt connection. 3. A core for a combustion appliance having a lower core portion F and an upper core portion G, wherein the lower core portion F is made of a nonwoven fabric 1 having a fuel-wicking property, and the upper core portion G is made of glass fiber. The yarn is divided into a plurality of third wefts 13
.. And a plurality of fourth wefts 14..., Each of the third wefts 13... And the fourth wefts 14... Is repeatedly folded, and the third wefts 13. 15 and the first lower folded portion 16 and the fourth weft 14.
The upper folded portion 17 and the second lower folded portion 18 are provided separately in upper and lower steps, respectively, and further provided in the first upper folded portion 15 and the fourth weft 14 provided in the third weft 13. Each of the first lower folded portion 16 provided on the second upper folded portion 17 and the third weft 13 and the second lower folded portion 18 provided on the fourth weft 14. , 6 ・
.. and the third weft 13 ... and the fourth weft 14 ... including the contact parts 6, 6 ... several warp yarns 7, 7
Are formed by a third knitted fabric 19 formed by chain knitting, and the lower end edge 10 formed by using the upper end edge 9 of the nonwoven fabric 1 and the cotton yarn of the third knitted fabric 19 as the fourth wefts 14. A wick for a burning appliance characterized by being butt-connected. 4. In a wick for a combustion appliance having a lower core portion F and an upper core portion G, the lower core portion F is made of a nonwoven fabric 1 having a fuel-wicking property, and the upper core portion G is made of glass fiber. The yarn is divided into a plurality of third wefts 13
A plurality of fourth wefts 14..., A reinforcing core 11 is interposed between the third wefts 13... And the fourth wefts 14. Third
A first upper folded portion 15 and a first lower folded portion 16 are provided on the weft 13..., And a second upper folded portion 17 and a second lower folded portion 18 are provided on the fourth weft 14. , A first upper fold 15 provided on the third weft 13, a second upper fold 17 provided on the fourth weft 14, and a first lower provided on the third weft 13. Each of the folded portions 16 and the second lower folded portions 18 provided on the fourth wefts 14... Overlap each other to form the overlapping portions 6, 6,. 3 wefts 13
, A fourth weft 14, and a fourth knitted fabric 20 formed by chain-knitting several warps 7, 7... And the upper edge 9 of the nonwoven fabric 1 and the fourth knitted fabric 20. A core for a combustion appliance, wherein lower ends 10 of cotton threads formed as fourth wefts 14 are butt-connected. 5. The first bent portion 22 is formed by providing a large number of vertically long slits 21, 21,... In a vertical direction of the nonwoven fabric 1 constituting the lower core portion F. The core for a combustion appliance according to claim 3, 4 or 5. 6. A large number of vertical slits 23 are provided in the upper part of the nonwoven fabric 1 constituting the lower core portion F,
The bent portion 24 is formed, and a plurality of cut portions 25 are provided at a lower portion to form a crotch portion 26.
The core for a combustion appliance according to claim 2, 3, or 4. 7. The nonwoven fabric 1 constituting the lower core portion F is formed by uniformly opening a non-twisted tow so that the long fibers 27 are aligned in a substantially straight line parallel to the same direction of the fuel sucking direction. A long fiber fabric is laminated to form a long fiber layer 28, the long fiber layer 28 is laminated so that the short fiber web layer 29 becomes both outer layers, and the outer surfaces of both outer layers are smoothed to form a long fiber layer. The combustion appliance according to any one of claims 1, 2, 3, 4, 5, and 6, wherein the web 28 and the short fiber web layer 29 are integrally formed so as not to be separated. Core.