JP6193568B2 - Work glove knitting method - Google Patents

Description

The present invention provides a glove knitted by knitting, factory, relating to the organization process of heavy work gloves for use in work site farm like.

  The work gloves are knitted using a small flat knitting machine such as a glove knitting machine. As shown in FIG. 1, the conventional left / right type gloves usually have a little finger 7, a ring finger 6, a middle finger 5, an index finger 4, a thumb bag of 3 thumbs, and a knitted portion of 5 barrels on the back side or palm side of the hand. They are organized so that they are on the same plane. Specifically, the glove is first knitted from the finger bag of the little finger 7, and after each finger bag is knitted in the order of the ring finger 6, the middle finger 5, and the index finger 4, the little finger 7 to the index finger 4 are formed into one cylindrical body. The main body is knitted. Then, after knitting the four torso, the thumb 3 is knitted, the five torso is knitted with the thumb 3 and the previously knitted four torso together, and the wrist is knitted. To do. Also, when knitting a finger pouch, for example, when a glove is knitted using a glove knitting machine dedicated to gloves, usually a restraining rod called a razor is used, and a finger pouch knitted first by this razor is used. Of the stitches, the second to third stitches on the side close to the finger bag to be knitted are held and locked to the knitting needle, and the knitting needle with the stitches locked is also used for knitting the next finger bag. The next finger bag is organized. The position of the razor is moved each time so that this operation is performed at each finger crotch from the little finger 7 to the index finger 4. After all the finger bags except the thumb 3 have been knitted, the stitches that have been made inactive are put into the working state, and the knitting yarn is circulated in a state where the stitches are overlapped at the finger crotch portion, so that the four cylinders Organize. Such knitting of the finger crotch is also performed between the four barrels and the thumb 3. Conventional knitting of gloves has been knitted by a method of a flat knitted fabric called flat knitting (for example, Patent Documents 1 and 2).

  In the above gloves, thick cotton yarns in the range of 3 to 9 gauge are used, and knitted gloves knitted by plain knitting are so-called gloves and are used at work sites such as factories and farms. The work gloves are knitted with thick cotton yarn in consideration of the safety of hands during work, and have a thick structure (for example, Patent Document 3).

  However, while conventional work gloves are thick, currently one piece is often insufficient to protect your hands from cuts, heat, and impacts. There were many. When using two layers, the cut resistance, heat resistance, and impact resistance are improved. However, since the air permeability is impaired, there is a problem that the workability is remarkably reduced because it is easily stuffy and difficult to bend. .

  In order to solve the above problems, high-performance fibers are known in which the performance of the yarn itself for knitting gloves is improved. In terms of cut resistance, aramid fibers (for example, “Kevlar (registered trademark)” manufactured by Toray DuPont, “Technola (registered trademark)” manufactured by Teijin, “Twaron (registered trademark)”, etc.), nylon, polyester fibers (for example, , “Dacron (registered trademark)” manufactured by Invista, “Tetron (registered trademark)” manufactured by Teijin / Toray, etc.), high strength polyethylene fiber (for example, “Dyneema (registered trademark)” manufactured by DSM, “Spectra (registered trademark) manufactured by Honeywell) ) "Etc.) and other fibers having cut resistance are used. In addition, in terms of heat resistance, fibers having heat resistance such as aramid fibers (such as “Conex (registered trademark)” manufactured by Teijin) are used.

  Gloves knitted or sewn with these materials are expensive for the materials themselves, so they are not suitable for frequent replacements in highly contaminated workplaces such as the bakery and automobile manufacturing industries. There was a problem. Therefore, there is a need for a work glove that does not change the fiber itself, has a devised glove knitting method, and has functions such as cut resistance, heat resistance, and impact resistance.

Japanese Patent No. 4049673 International Publication WO 2004/020719 Japanese Patent Laying-Open No. 2005-154983

The problem to be solved by the present invention is a glove that solves the above-mentioned problems, and has a cut-resistant, heat-resistant, shock-resistant, excellent air permeability, and easily bent. An object of the present invention is to provide a new knitting method for work gloves which is highly inexpensive and inexpensive.

In order to achieve the above object, the work glove knitting method according to claim 1 is knitted by a flat knitting machine in which a bed equipped with a large number of knitting needles is provided facing the front and back. Among the knitting needles arranged in the section, 1 to a plurality of courses are knitted in the course direction and 1 to a plurality of knitting needles are skipped, and after knitting, the stitches adjacent to the core are contracted by the knitting yarn in the inoperative position A pipe-shaped ridge is formed, and the upper and lower courses of the course forming the projection are knitted by flat knitting to form a flat flat portion.

  The working glove according to the present invention has a ridge portion and a flat portion formed on the surface of the glove, the ridge portion increases the thickness of the glove body, and the cut-resistant effect is achieved without using expensive materials such as high-performance fibers. Further, the heat resistance and heat retention are further improved, and there is an effect that the hand can be surely protected. Furthermore, there is an effect that a gap is formed by the unevenness of the ridge portion and the flat portion, the breathability of the palm and fingers is ensured, and the stuffiness of the hand can be prevented. Further, since the glove body is knitted while forming the ridge portion with one thread, there is an effect that it can be manufactured inexpensively and easily in a short time. In addition, since the protrusions are formed continuously in a direction substantially perpendicular to the direction in which the hand is inserted, that is, in a direction substantially perpendicular to the bending direction of the joint, the wrist and finger joints are easily bent, and workability is improved. There is also an effect of improving.

  The glove which concerns on this invention aimed at improving functions, such as cut resistance and heat resistance, using common materials, such as cotton yarn. When higher cut resistance and heat resistance are required, the glove according to the present invention can be implemented using the high-performance fiber according to demand. Thereby, cut resistance and heat resistance can be further improved as compared with gloves knitted by general knitting (flat knitting).

It is a surface perspective view of the work glove which concerns on this invention. It is an inner surface perspective view of the working glove of FIG. It is the perspective view which expanded a part of FIG. It is a top view explaining a protrusion part. It is a top view explaining the close protrusion part which performed the cutting experiment of the working glove. It is a top view explaining the sparse ridge part which performed the cutting experiment of the working glove. It is a figure which shows the cutting experiment data of the work glove which concerns on this invention. It is a figure which shows the cutting experiment data of the work glove which concerns on this invention. It is a figure which shows the heat-resistant experiment data of the work glove which concerns on this invention. It is a top view explaining the normal protrusion part which experimented the working glove. It is explanatory drawing of an air flow rate tester. It is expansion explanatory drawing of an air flow rate tester. It is a figure which shows the ventilation | gas_flowing amount data of the glove for ridge knitting work. It is a perspective explanatory view of a heat test machine. It is a perspective explanatory view of a heat test machine. It is a figure which shows the heat-resistant experiment data of the glove for ridge knitting work. It is explanatory drawing of a shock absorbency tester. It is explanatory drawing of a shock absorbency tester. It is a figure which shows the impact experiment data of the glove for ridge knitting work. It is explanatory drawing of a cut testing machine. It is explanatory drawing of a cut testing machine. It is explanatory drawing of a cutting coefficient. It is a figure which shows the cutting experiment data of the glove for a ridge knitting operation | work. It is a figure which shows the sensory evaluation test data of the glove for ridge knitting work.

As shown in FIG. 1, the working glove 1 includes five finger bags 3 to 7 and a palm bag 2 and is knitted by a single layer knitted fabric.
FIG. 2 is a diagram in which the work glove 1 is turned upside down so that the outer surface is on the inside and the inner surface is on the outside, and the fact that the protrusions 10 are formed on the inner surface of the work glove 1 shown in FIG. FIG. In the present invention, on the inner surfaces of the finger bags 3 to 7 and the flat bag 2 of the hand, a protruding portion 10 and a flat portion 15 are formed by knitting a thread into a pipe shape. The protrusions 10 are formed in a plurality of rows in a direction substantially perpendicular to the finger insertion direction A, and the flat part 15 is provided between the protrusions 10 in a direction parallel to the protrusions 10. . The protruding portion 10 and the flat portion 15 are preferably formed on the inner surfaces of the finger bags 3 to 7 and the flat bag 2 of the hand, but are partially provided such as only on the inner side of the finger bags 3 to 7. It is also possible.

  The work glove 1 has a plurality of ridges 10 formed in a direction substantially perpendicular to the direction A in which the hand is inserted into the inner surface, and the ridges 10 increase the thickness of the glove body 1a, resulting in a cut-resistant effect, It is a work glove that can further improve the heat resistance and heat retention and ensure the protection of the hand. Furthermore, by forming the gap 11 between the protrusions 10 and 10, the breathability of the palm flat bag 2 and the finger bags 3 to 7 is ensured, and it is possible to prevent the hands from becoming damp. Moreover, since the glove body 1a is knitted while forming the ridge portion 10 with one thread, it can be manufactured inexpensively, easily and in a short time. In addition, since the protrusion 10 is continuously formed in a direction substantially perpendicular to the direction A in which the hand is inserted, that is, in a direction substantially perpendicular to the bending direction of the joint, the wrist and finger joints can be easily bent. Improve sexiness. Furthermore, the protrusion part 10 can also stimulate a hand and can expect the massage effect.

  The working glove 1 has the ridge 10 formed on the inner surface, but the ridge 10 may be formed on the outer surface. When the ridge portion 10 is formed on the outer surface, in addition to the above-mentioned cut resistance effect, heat resistance effect, and heat retaining property, the ridge portion directly contacts the object, so that the frictional force between the ridge portion 10 and the contact object is improved. In addition, the grip strength of the work gloves can be improved. Moreover, when carrying the articles | goods which have a protrusion, it becomes easy to carry by hooking the protrusion part 10 on the protrusion of a target article.

  Further, the working gloves 1 will be described in detail. As shown in FIG. 1, the working glove 1 includes a palm bag 2 and five finger bags, that is, a thumb bag 3, an index finger bag 4, a middle finger bag 5, a ring finger bag 6, and a little finger bag 7. The work gloves 1 are knitted by a single layer knitted fabric such as flat knitting. As shown in FIG. 2, the ridges are substantially parallel to the inner surface of the working glove 1, that is, the entire inner periphery of the palm bag 2, thumb bag 3, index finger bag 4, middle finger bag 5, ring finger bag 6, and little finger bag 7. 10 is formed.

  The work gloves 1 and the ridges 10 are formed as follows. The working gloves 1 are knitted by a flat knitting machine provided with a bed with a large number of knitting needles facing each other, for example, a seamless glove knitting machine (product name: SFG) manufactured by Shima Seiki Seisakusho Co., Ltd. These show the case where the work gloves 1 in which the ridge portions 10 are formed on the entire glove knitted fabric are knitted. In the case of regular knitting (flat knitting) work gloves, all the knitting needles are installed on the front and back beds of the glove knitting machine (total needles), so the outer and inner surfaces are flat knitted fabrics, The notable point of the present embodiment is that one or more knitting needles of the bed are placed in the inactive position and knitted one or more courses, and after knitting, the knitting yarn in the inactive position is contracted to the stitch adjacent to the core. Thus, the outer knitted fabric becomes a knitted fabric having three-dimensional irregularities by the knitted fabric composed of the ridge portion 10 knitted into a pipe shape and the flat portion 15 knitted by flat knitting. Specifically, as shown in FIG. 4, the knitting needles are alternately arranged at the inactive positions P1 to P5 over the entire circumferential surface, knitted for about 7 courses, and the knitted yarn at the inactive position after knitting is adjacent to the core. As shown in FIG. 3, pipe-shaped protrusions 10 are alternately provided on the inner surface. The protrusion 10 is formed in a horizontal stripe shape. That is, the working glove 1 is formed based on a flat knitted fabric (flat portion) 15 and has three stitches 16 in the longitudinal direction (Y direction) at every second stitch position P1 to P5 in the lateral direction (X direction). Each of the seven stitches 16 is skipped to form an annular protrusion 18, and the annular protrusions 18, 18 are continuous in the lateral direction to form a pipe-shaped protrusion 10. In this embodiment, the flat knitted fabric (flat portion) 15, the number of inactive positions P, and the number of stitches to be missed are set as examples. However, it is not necessary to limit to this number, and the desired density of pipe knitting, Of course, it can be changed at any time according to the thickness.

  In the above knitting method, the ridge 10 is formed on the outside of the glove during knitting. Therefore, when manufacturing gloves with ridges on the inside as shown in Fig. 1, the cuff part is knitted as it is after knitting the wrist, and finally the inside is turned over so that the outer surface is on the inner surface and the inner surface is on the outer surface. To complete. Also, when manufacturing gloves with ridges on the outside, remove the gloves from the knitting machine once after knitting the wrist, turn it over so that the outer surface is on the inner surface and the inner surface is on the outer surface, and then again on the knitting machine It can be manufactured by attaching and knitting the cuff part.

  The protrusion 10 may be formed by printing a synthetic resin such as rubber, vinyl chloride, silicone resin, acrylic resin, or foamed resin. However, since the printing process is added to the knitting process of the work glove 1, Manufacture of work gloves is cumbersome and work gloves are expensive. Further, although the ridge portion 10 can be formed by layer knitting of other yarns, a device for knitting other yarns is required, making the production of the working gloves 1 cumbersome and making the working gloves expensive. .

  Since the work glove 1 knits the glove body 1a while forming a plurality of protrusions 10 with a single thread, it can be manufactured inexpensively and easily in a short time. In conventional thick work gloves, when a hand is inserted, since the glove body is stretched, tension is applied and it is difficult to bend hands and fingers. In the working glove 1 described above, the protrusions 10 are continuously formed in a direction substantially perpendicular to the direction in which the hand is inserted, that is, in a direction substantially perpendicular to the bending direction of the joint. It becomes easy to bend and workability is improved. Further, the protrusion 10 can stimulate the hand and expect a massage effect.

  Experiments were conducted to determine how much the work glove 1 having the ridges improved the cutting coefficient and the heat resistance effect compared to the normal knitted (flat knitted) work gloves. As the knitting work gloves, a knitting work gloves and a loose knitting work gloves were prepared. As shown in FIG. 5, the protruding portion densely knitted work glove skips five stitches 16 every two stitches 16 in the longitudinal direction (Y direction) at every two stitch positions in the transverse direction (X direction). (5 courses are inserted once in 2 courses) to form pipe-shaped ridges, and the space between the ridges is narrowly divided into two stitches. As shown in FIG. 6, the loosely knitted ridge work gloves skip five stitches 16 every six stitches 16 in the longitudinal direction (Y direction) at every two stitch positions in the horizontal direction (X direction). (5 courses are inserted once in 6 courses) to form pipe-shaped ridges, and the space between the ridges is widened to 6 stitches.

  As shown in Fig. 7, when the work gloves are knitted only with flat knitting with a 7-gauge knitting machine using cotton yarn, the cutting coefficient is 2.0, whereas the work gloves are tightly knitted with the 7-gauge knitting machine. In the case of knitting with a flat knitting including a protruding portion, the cutting coefficient was improved to 2.8. In addition, even when the work gloves were knitted with a flat knitting including loose knitting protrusions on a 7 gauge knitting machine, the cutting coefficient was improved to 2.4. Furthermore, as shown in FIG. 8, when the work gloves are knitted with only 7 knitting machines with ultra high strength polyethylene fiber yarns, the cut coefficient is 6.2, but the 7 gauge knitting machine is the same. When the work gloves were knitted with flat knitting including loose knitting protrusions on the machine, the cutting coefficient was improved to 8.8. In this way, the work glove 1 has a cut-off coefficient improved by about 30% compared to that of the normal knitted (flat knitted) by forming the protruding portion. In addition, a grade becomes a high numerical value, so that the value of a cutting coefficient is large.

  In the heat resistance experiment of the work gloves, the work gloves are placed on a hot plate set to a specific temperature, and a metal plate for temperature measurement is placed on the work gloves. The temperature change of the metal plate placed on the work gloves was examined, and the temperature change was regarded as the temperature rise inside the work gloves in the work of grasping a hot object. A hot plate temperature was set to around 200 ° C., and a flat knitting work glove, a projecting part dense knitting work glove, and a projecting part loose knitting work glove were placed in this order, and the time to reach 80 degrees was measured. By the way, the flat knitting work gloves were the earliest, 25 seconds, the protruding part dense knitting working gloves were 39 seconds, and the protruding part loose knitting working gloves were 40 seconds. As is clear from this experimental result, it is understood that the work gloves provided with the protrusions are about 60% lower in heat transfer rate and improved in heat resistance than ordinary work gloves. it can.

  Next, a test was conducted to determine how much the normal knitting work gloves of the ridges were improved in breathability, heat resistance, impact resistance, and cutting coefficient as compared with normal knitted work gloves. As shown in FIG. 10, the ridge portion ordinary knitting work glove skips five stitches 16 every four stitches 16 in the longitudinal direction (Y direction) at every two stitch positions in the lateral direction (X direction). (5 courses are inserted once in 4 courses) to form pipe-shaped ridges, and between the ridges is made into 4 stitches. That is, the protruding portion normal knitting work glove has a substantially intermediate configuration between the above-described protruding portion dense knitting working glove and the above described protruding portion loose knitting working glove. The protruding portion ordinary knitting work gloves are knitted with cotton yarn by a flat knitting including the protruding portion of the ordinary knitting with a 7 gauge knitting machine. Ordinary knitting (flat knitting) work gloves are knitted with cotton yarn only by plain knitting on a 7 gauge knitting machine.

  The air permeability test was carried out by Frazier square (JIS L 1096: 2010 Fabric test method for fabrics and knitted fabrics 8.26.1 Breathability A method). As shown in FIGS. 11 and 12, in the state where the test piece is placed on one side of the cylinder of the Frazier type tester and the inclined pressure gauge is sucked at a constant pressure (125 Pa), the value of the vertical pressure gauge and the measurement device The amount of air passing through the test piece (cm ^ 3 / (cm ^ 2 · s)) is determined according to the type of air hole. The test results are shown in FIG. The upper part of FIG. 13 is data on the projecting knitting work gloves, and the lower part is data on the flat knitting work gloves. As is clear from the test results, it can be understood that the knitted work gloves have a larger air permeability and higher air permeability than ordinary plain knitting work gloves.

  Pipe knitting refers to ridge knitting, and non-pipe knitting refers to flat knitting. A back side means the uneven | corrugated | grooved part side and is the O side of FIG. The front side refers to the non-recessed portion side and is the P side in FIG. The front side and the back side are expressions temporarily given at the time of the experiment, and the uneven portion side may be expressed as the front side and the non-recessed portion side may be expressed as the back side. It was also found that pure cotton knitting has a larger air flow rate than blended knitting. Single means measurement with one sheet, and double means measurement with two sheets. Needless to say, a single layer has more airflow than a double layer. Normal knitting (flat knitting) is composed only of a flat surface, whereas ridge (pipe) knitting is composed of a flat surface and an uneven surface, and this characteristic uneven shape increases the surface area. The air permeability is increased and the air permeability is improved as compared with normal knitting (flat knitting).

  In the heat resistance test, as shown in FIGS. 14 and 15, a glove was attached to a metal hand mold having a thermocouple (sensor) attached to the palm, and the glove was heated to 200 to 250 degrees by a hot plate. Gently place it on the stainless steel plate, and examine the time until the temperature of the hand mold reaches 40 degrees and 50 degrees after the stainless steel plate and the gloves contact. Work gloves and pure cotton pipe knitted work gloves were measured. The work gloves are pure cotton non-pipe knitted (flat knitted) work gloves. Pure cotton pipe knitted (protruded knitting) work gloves are covered with a metal hand mold so that the non-concave part side (P side in FIG. 3) is the front side, and the non-concave part side (planar part side) is a stainless steel plate. It is divided into the case where it is brought into contact with the stainless steel plate and the uneven portion side (protruding portion side) is brought into contact with the stainless steel plate with the uneven portion side (O side in FIG. 3) being the front side and covered with a metal hand mold. A test was conducted.

  The test results are shown in FIG. It took 3 seconds to reach 40 degrees with a single workman and 57 seconds to reach 50 degrees. When the two gloves were stacked, the 40 degree arrival time was 19 seconds and the 50 degree arrival time was 104 seconds. On the other hand, when the non-concave part side is the front side, the pure cotton pipe knitting (projection knitting) work glove takes 40 degree arrival time of 37 seconds and 50 degree arrival time of 227 seconds, and the uneven part side is front side. In this case, it took 59 seconds to reach 40 degrees and 319 seconds to reach 50 degrees. Pure cotton pipe knitting (protruding knitting) work gloves contain a relatively large amount of air compared to normal knitting (flat knitting) due to the characteristic uneven shape of pipe knitting (protruding knitting). Because it worked, the way of heat transmission is low, and heat resistance is improved compared to ordinary flat knitted gloves (work gloves).

  As shown in FIGS. 17 and 18, in the impact resistance test, a test piece is placed on a model of an impact absorption tester, and a flat plate striker (5 kg) is dropped from a height of 10 mm above the test piece. Find the impact value. The test results are shown in FIG. As described above, pipe knitting refers to protruding knitting, and non-pipe knitting refers to flat knitting. The uneven portion side is the O side in FIG. A single is a single sheet, and a double is a double sheet. Needless to say, the impact value is lower than that of the single layer because the thickness of the double layer increases.

  The impact value of dropping a plate striker (5 kg) directly on the model is the highest, followed by pure cotton and non-pipe knitting of blended cotton. Pure cotton and blended pipe knitting has a lower impact value than non-pipe knitting. As is apparent from the test results, it can be understood that the pipe knitted (protruded knitted) work glove reduces the impact compared to the normal knitted (flat knitted) work glove due to the characteristic uneven shape.

  The cut test was performed with a cut tester (STM-611) of EU standard (EN388) as shown in FIGS. Place the test piece on the table, run the circular blade on the test piece while rotating it in the direction opposite to the running direction, cut the test piece, and travel distance of the circular blade required to cut the test piece Then, the cutting coefficient is obtained from the travel distance required to cut the cotton fabric defined in the standard with the same circular blade. As shown in FIG. 22, the cutting coefficient is given a grade of 5 levels corresponding to the numerical value.

  The test results are shown in FIG. Pure cotton pipe knitting (protruding knitting) has a higher cut coefficient due to the increased amount of yarn due to the characteristic uneven structure compared to flat knitting (no pipe knitting), resulting in improved cut resistance. Yes. As described above, the normal knitting work gloves for the ridges have improved breathability, heat resistance, impact resistance, and cutting coefficient as compared to the normal knitted work gloves.

  Work gloves are worn on the hand and work as described above. Even if each function is improved as described above, if it is difficult to work, it is not suitable for actual use. Went. Prepare flat knitting work gloves and pipe knitting work gloves, one flat knitting work glove, two layers of flat knitting work gloves, pipe knitting work gloves with protrusions on the outside, pipe knitting work with protrusions on the inside In the order of gloves, they were worn by multiple workers and opened and closed by hands to evaluate the feeling of use. Two-layer flat knitting work gloves were evaluated to be harder than one flat knitting work glove. Pipe knitting work gloves with protrusions on the outside were rated slightly less than 60% as being softer than a single flat knitting work glove, approximately 20% were rated unchanged, and 20% were rated as being hard. . In addition, pipe knitting work gloves with protrusions on the inside have an evaluation of about 30% softer than a single flat knitting work glove, about 50% of evaluation that it does not change, and about 20% of evaluation that it is hard. there were. From this result, it can be considered that the pipe knitting work gloves are easier to use than the two-layer flat knitting work gloves, and can be used almost as much as one flat knitting work glove.

  Moreover, the above-mentioned knitting of a ridge (pipe knitting) is applicable not only to a gloves with a conventional thick yarn material but also to a glove using a fine yarn (10 to 18 gauge).

  For gloves equipped with this ridge, in order to improve grip strength and strength, the surface of the glove should be coated with a synthetic resin such as rubber, vinyl chloride, silicone resin, acrylic resin, foam resin, etc. Is also possible. In this regard, even when processing is performed to impair the air permeability of the glove surface, such as a coated glove, the portion having the protrusions does not penetrate into the inside of the glove and creates a space for allowing ventilation inside the glove. It is possible to improve the breathability of the coated gloves.

  The present invention can be used for work gloves used in environments such as factories, farms, and other work sites.

P position 1 Work gloves 1a Glove body 2 Flat bag of hand 3 Thumb bag 4 Index finger bag 5 Middle finger bag 6 Ring finger bag 7 Little finger bag 10 Projection 11 Clearance 15 Flat knitted fabric (flat part)
16 stitches 18 annular projection

Claims (1)

The work gloves are knitted by a flat knitting machine provided with a bed equipped with a large number of knitting needles facing the front and back,
Among the knitting needles arranged in the bed part, one to a plurality of courses are knitted by placing one to a plurality of knitting needles in an inoperative position in the course direction, and after knitting, the knitting yarn in the inactive position is contracted to a stitch adjacent to the core To form a pipe-shaped ridge,
A method for knitting a work glove characterized in that the upper and lower courses of the course forming the protrusions are knitted in a flat knitting to form a flat flat part.