JP5580526B2 - Powder sealing material made of knitted fabric with restricted stretchability - Google Patents

Description

  The present invention relates to a seal member for sealing powder so as not to leak from the axial end of the rotating body in an apparatus for handling powder by the rotating body, particularly to supply toner for an image forming apparatus in an electrophotographic apparatus. The present invention relates to a powder sealing material made of a knitted fabric for sealing an end of a rotating body so that toner does not leak out from the rotating body such as a roller, a stirring roller, an image carrier or a toner carrier.

  Conventionally, a knitted fabric in which a pile is formed from filament yarn and fluororesin fiber has been devised (see, for example, Patent Document 1). However, this has a high elasticity as a characteristic of the knitted fabric, and when this is provided at a location where it slides on the rotating body and is used as a sealing material such as powder, the rubbing force on the rotating body. As a result, the knitted fabric is stretched to form a gap, and a phenomenon occurs in which the powder leaks therefrom. By the way, there has conventionally been no powder sealing material using a knitted fabric made of a general material. This is because the sealing material made of a knitted fabric of a general material is rubbed against the rotating body due to the stretchability, which is the characteristic described above, and the sealing material is more easily stretched, so that the sealing performance of the powder is reduced. It is.

  By the way, a knitted fabric of a knitted fabric formed from a pile yarn and a ground yarn forming a loop pile having a loop or a cut loop pile obtained by cutting the loop has a problem that there is more hair loss than before, particularly long fibers. Since there is no fluff in the pile yarn using the filament yarn, there is little entanglement between the pile yarn and the ground yarn, and there was a problem that a lot of hair loss is likely to occur due to mechanical hair separation etc. .

  Furthermore, conventionally, as a countermeasure against such hair loss, an adhesive or an adhesive (hereinafter simply referred to as “adhesive”) is provided on the back surface of the knitted fabric as a countermeasure against hair loss. However, in general adhesives, the adhesive penetrates into the upper part of the pile yarn between the fibers of the pile yarn composed of a plurality of fibers by a capillary phenomenon in a thin fabric or thin knitted fabric. Is cured, the fibers around the area that is the root of the pile yarn are agglomerated as a result of the curing. As a result, voids are formed in the portion. As a result, the effect of hair separation was reduced by half and the powder leaked easily.

  Therefore, even when the cushion material is provided on the weft knitted fabric through an adhesive, the stretchability, which is a feature of the weft knitting, cannot be sufficiently regulated. When a toner sealing material for a forming apparatus is used, a phenomenon occurs in which the knitted fabric stretches in the rotational direction due to rotational force and frictional force caused by contact with the rotating body, and powder, that is, toner enters the stretched gap. There was a problem.

  In addition, in a flat knitted knitted fabric made of pile yarn with a loop, when the loop is cut, the cut loop pile is in a reverse C-shape, and even if it is subjected to hair separation, it remains in a reverse C-shape. When powder sealing materials are used, the flow of powder cannot be sufficiently controlled, and this causes variations in the flow of powder, which causes leakage of toner, which is powder, to the outside. It was.

Utility Model Registration No. 3065136

  The problem to be solved by the present invention is to eliminate leakage of powder to the outside in a powder sealing material made of knitted fabric, and to regulate fiber slipping of the powder sealing material and elasticity of the powder sealing material. In particular, by restricting the stretchability, which is a characteristic of knitted fabrics, the elongation due to sliding with the rotating body is restricted to eliminate gaps for powder leakage, and leakage to the outside caused by variations in powder flow It is an object of the present invention to provide a powder sealing material made of a knitted fabric that prevents the protrusion. Furthermore, the present invention is to provide a powder sealing material that can be sealed with a low load and that is reduced in cost while being sealed by applying a high load.

  Means of the present invention for solving the above-mentioned problems are as follows.

  (1) The loop 12a or the cut loop 12b provided on one side of the powder sealing material 6 made of the knitted fabric 10 is tilted in one direction on one side of the knitted fabric 10, and further the loop 12a made of pile yarn of the powder sealing material 6 Or it is the powder sealing material 6 which controlled the flow of the powder by making the attachment angle with respect to the axial direction inner side 18 of the rotary body 17 which attaches the cut loop 12b into 0 degree-70 degrees.

  That is, in the means of claim 1, a loop 12a made of the pile yarn 12 or a cut loop 12b formed by cutting the loop 12a is formed on one side of the flat knitted fabric 10 made of the pile yarn 12 and the ground yarn 13, and the weft knitting is performed. The knitted fabric 10 is used as a powder sealing material 6, and the powder sealing material 6 is further contacted with the end seal material 6 a of the image carrier 17 a or the powder carrier 17 b as the rotating body 17 or the rotating body 17. The knitted fabric 10 is expanded and contracted as a surface different from the surface forming the loop 12a or the cut loop 12b of the knitted fabric 10 composed of the pile yarn 12 and the ground yarn 13 formed with the loop 12a or the cut loop 12b on one side. The structure in which the property is restricted is the loop 12a or cutle of the knitted fabric 10 formed from the pile yarn 12 having the loop 12a or the cut loop 12b and the ground yarn 13. The resin coating layer 15a by application or the resin spray coating layer 15b by mist spray or a thin thickness on the back surface of the knitting 10 which is the other side different from the surface which is one side of the knitting 10 forming the knitted fabric 12b. The structure in which the stretchability of the knitted fabric 10 is regulated is formed by a predetermined tensile load or contact friction. In the powder sealing material 6 using the knitted fabric 10 of 5% or less, the pile yarn 12 having the loop 12a or the cut loop 12b obtained by cutting the loop 12b is one kind of natural fiber, artificial fiber or synthetic fiber. It consists of pile yarn 12 knitted from a spun yarn composed of the above fibers by a flat knitting machine having a gauge number of 20 gauge or more per inch, The loop 12a or the cut loop 12b formed from the loop 12a is tilted in one direction on one side of the knitted fabric 10, and is the image carrier 17a or the powder carrier 17b of the fallen loop 12a or the cut loop 12b. The loop 12a or the cut loop 12b is brought into contact with the end of the rotating body 17 which is the image carrier 17a or the powder carrier 12b with the angle of attachment of the rotating body 17 to the inner side 18 in the axial direction being in the range of 0 ° to 70 °. The knitted fabric 10 is used in which the flow of the powder is regulated to prevent the powder from leaking out from the end of the rotating body 17 that is the image carrier 17a or the powder carrier 17b. This is a powder sealing material 6.

  (2) Further, in the means of the present invention, the processing step is reduced by using a flat knitted fabric, and further, there is no mechanical hair separation step to minimize hair loss and the cut pile yarn 14b of the cut loop 12b. It is the powder sealing material 6 opened to the state where the fibers are separated.

That is, the means of claim 2 is characterized in that the cut loop 12b formed from the pile yarn 12 is a cut loop 12b opened by soaping after cutting the loop 12a that has fallen to an angle in a certain direction. A powder sealing material 6 using the knitted fabric 10 according to claim 1 .

  (3) Further, according to the means of the present invention, the elastic body 16 is further disposed on the high-viscosity resin layer 15 in which the stretchability of the formation is restricted by the above-described means, and the powder has a desired contact load. Seal material 6.

That is, in the means of claim 3, the pile yarn 12 having the loop 12 a or the pile yarn 12 having the opened cut loop 12 b has the high-viscosity resin layer 15 in which the stretchability of the knitted fabric 10 is regulated on the back surface of the knitted fabric 10. The knitted fabric 10 of the means according to claim 1 or 2 , wherein the knitted fabric 10 is formed to have a desired contact load by disposing an elastic body 16 on the resin layer 15. This is a powder sealing material 6.

  (4) Further, according to the means of the present invention, for example, a powder that is toner is generated by vibrations exceeding a certain acceleration under a contact load applied to the elastic body 16 further formed on the high-viscosity resin layer 15 in which stretchability is restricted. The powder sealing material 6 prevents leakage to the outside of the body, and the elastic body 16 is formed from a foam 16a.

That is, in the means of claim 4, the elastic body 16 further provided on the high-viscosity resin layer 15 that restricts the stretchability formed on the back surface of the knitted fabric 10 has a compression load of 50% or more or a compression load of 10 g / cm ² . 4. The knitted fabric 10 of the means of claim 3 comprising a foam 16a that prevents leakage of powder under vibrations of acceleration of 30 m / s ^{2 at} a contact load in the range of 500 g / cm ^2. It is the powder sealing material 6 used.

By adopting the above means, the powder seal material of the means of claim 1 has its pile yarn loop tilted to an angle of a certain direction, and the loop pile yarn base is covered with a ground yarn, that is, a ground yarn. Since it is held, there are few voids in the stitches and powder leakage is prevented. Since the powder sealing material of the means of claim 2 is designed to open the fiber by soaping after cutting a loop that has fallen in a certain direction, there is no need for a splitting process and the manufacturing process is reduced. Since the powder sealing material of the means of claim 3 is further provided with an elastic body on the highly viscous resin layer in which the stretchability of the knitted fabric is restricted, that is, in the member surface in which the stretchability is restricted, an unprecedented low contact load. The powder can be sealed. Further powder sealant means according to claim 4, those of the elastic body in the range of 50% or more compression load or compressive load 10g / cm ² ~500g / cm ² consisting further provided a foam resin layer having a high viscosity vibration acceleration of 30 m / s ² in the contact load, so to prevent the out leaking powder, safe to respond to vibration of the powder transport and apparatus, the required load to match the seal to the clearance Since it can be arbitrarily selected within the above range, it is a powder sealing material that can be used in a wide range.

Embodiments of the present invention will be described below with reference to the drawings.
The embodiment of claim 1 of the present invention has the following configuration as a premise thereof. That is, as shown in FIG. 1A, the knitted fabric 10 includes a pile yarn 12 that forms a loop 12a on one side of a knitted fabric 10 made of weft knitting, and a ground yarn 13 that holds the pile yarn 12. . The material of the pile yarn 12 is made of microfiber made of acrylic and cotton and cotton (registered trademark: Supima). The material of the ground yarn 13 holding the pile yarn 12 is 15% shrink yarn (registered trademark: Exlan) made of polyester. Further, the pile yarn 12 having the loop 12 a on one side is a plating pile 11 in which the base portion of the pile yarn 12 is held by the ground yarn 13. For example, in the example shown by the knitting pattern of only the loop 12a in FIG. 4A, the loop 12a is composed of 50 stitches at 28 gauge per inch. The distance between the loop 12a of the pile yarn 12 and the left and right adjacent loops 12a is 0.9 mm, the distance between the upper and lower adjacent loops 12a is 0.5 mm, and the length of the loop 12a is 2.8 mm. The left and right opening angle is 34.3 °. FIG. 4 (b) shows 25 stitches at 28 gauge per inch. These 28 gauges generally have a total fineness (thickness of thread used) of 200 T (200 T: diameter of approximately 0.13 mm) or less. T indicates decitex. (C) in FIG. 4 is a knitting pattern consisting of 50 stitches at 20 gauge per inch and consisting of loops 12a. These knitted fabrics 10 are constituted by weft knitting in which stretchability is regulated as the most characteristic structure in the present invention, and the toner 7 which is powder can be reliably sealed by these structures. For example, FIG. It is formed on the powder sealing material 6 shown in (c). This weft knitting is, for example, (1) fineness of pile yarn 60/1 (cotton count) and 98.6T (decitex), and (2) the fiber composition of the pile yarn is acrylic fiber (1.7T) 30%, cotton (3T) is 70%, and therefore, the average is 2.61 T (decitex). Therefore, (3) the number of fibers used is 98.6 / 2.61 = 35 (lines / Thread).

  In the first embodiment of the powder sealing material 6 made of this knitted fabric 10 made of weft knitting, it is a knitted fabric 10 made of weft knitting having pile yarns 12 having loops 12a formed on one side of a knitted fabric made of ground yarn 13. The tip of the loop 12a is formed on the powder seal material 6 in a state where the loop pile yarn 14a remains without being cut by shearing. In the step of manufacturing the powder sealing material 6 in the state where the loop pile yarn 14a remains, first, the knitted fabric 10 having the loop pile yarn 14a is soaped, that is, washed at a water temperature of 90 ° C. Further, the knitted fabric 10 having the looped pile yarn 14a is dried at a heating temperature of 100 ° C., and then a high-viscosity resin layer 15 is formed on the back surface of the knitted fabric 10 having the loop 12a in order to regulate the stretchability of the knitted fabric. After forming, it is inspected. By this manufacturing process, as shown in FIG. 1 (a), a powder seal comprising a stretch knitted weft knitted fabric 10 having a loop pile yarn 14a held by a ground yarn 13 on one side of the knitted fabric 10. Material 6 is formed.

  On the other hand, in the second form of the powder sealing material 6 made of the knitted fabric 10 made of weft knitting, the knitted fabric 10 made of weft knitting has the pile yarn 12 having the loop 12a formed on one side of the knitted fabric made of the ground yarn 13. . However, unlike the first embodiment described above, the tip of the loop 12a is cut by shearing, and is formed on the powder seal material 6 from the cut loop 12b formed of the cut pile yarn 14b. In the process of manufacturing the powder sealing material 6 having the cut loop 12b of the cut pile yarn 14b, first, the tip end portion of the loop 12a of the pile yarn 12 is cut by shearing, as shown in FIG. The cut loop 12b is formed of the cut pile yarn 14b. Next, the knitted fabric 10 having the cut pile yarn 14b as the cut loop 12b is soaped at a water temperature of 90 ° C. Furthermore, the knitted fabric 10 having the cut cut pile yarn 14b is dried at a heating temperature of 100 ° C., and further, the cut pile yarn 14b is separated as shown in FIG. Therefore, as shown in FIG. 2, a high-viscosity resin layer 15 is formed on the back surface of the surface having the cut pile yarn 14b, and then inspection is performed. By this manufacturing process, as shown in FIG. 1 (c), the stretchability of the knitted fabric 10 having a cut loop 12b formed by cutting the tip of the loop 12a held by the ground yarn 13 is regulated. A powder sealing material 6 made of a flat knitted fabric 10 is formed.

  On the other hand, in order to manufacture a seal material made of cut pile yarn in the process of manufacturing a seal material made of pile yarn of a conventional pile weave made of a woven fabric as a comparative example, first, in the direction perpendicular to the base fabric of the woven fabric, The ends of the loops are sheared in order to align the lengths of the loops being formed, and then a backing for fixing the fabric base fabric is performed. Further, the fiber of the cut loop made of cut pile yarn cut by shearing is split several times. Further, the bevel hair is applied several times to lay the cut loop standing vertically on the fabric base fabric. Further, the beveled cut loop is sheared again, and the height of the end face of the bevel of the cut loop is made uniform to form the seal material. Thus, the loop made of pile yarn in the conventional woven fabric of the comparative example stands in the direction perpendicular to the fabric base fabric. Therefore, it is necessary to bevel the piles standing in the vertical direction in order to lay them down after shirring. On the other hand, although the woven fabric is backing to fix the base fabric, the woven fabric does not stretch because it is a woven fabric. Therefore, a process for restricting stretchability like a knitted fabric is not performed. As described above, the loop 12a or the cut loop 12b made of the pile yarn 12 of the knitted fabric 10 in the present invention and the loop made of the pile yarn of the conventional woven fabric have different processing steps, and the properties thereof are also different.

Next, the premise of the embodiment of claim 1 will be further described. Under this premise, the loop 12a or the cut loop 12b made of the pile yarn 12 of the knitted fabric 10 made of the loop pile yarn 14a or the cut pile yarn 14b and the ground yarn 13 is used in order to obtain a structure in which the sealing property and the stretchability are most restricted. As shown in FIG. 2, a high-viscosity resin layer 15 is formed on the back side surface, which is the other side of the knitted fabric 10, which is different from the surface that is one side of the knitted fabric. The resin layer 15 may be the resin coating layer 15a by application of FIG. 2A, or the resin spray coating layer 15b sprayed in the mist state of FIG. 2B, or (c) of FIG. ), For example, one release paper of a double-sided adhesive tape having release paper is peeled and pasted to form a resin sheet layer 15c having release paper 15d on the back surface. Since the stretchability of the knitted fabric 10 formed on the powder sealing material 6 is regulated by the high-viscosity resin layer 15 formed on the back side of these knitted fabrics 10, the knitted fabric 10 is cut and the powder sealing material 6 Workability at the time of cutting is improved. Further, the powder sealing material 6 made of the knitted fabric 10 has an elongation of 5% or less even when a predetermined tensile load or contact frictional force is applied .

  By the way, in order to form the resin coating layer 15a by the normal application, it is difficult to apply uniformly by regulating the application amount or spray coating by regulating the spray amount uniformly, and the resin coating agent is piled up. It is necessary to reduce the permeability to be impregnated into the yarn 12. Therefore, a high viscosity resin of 500 cp to 3000 cp, preferably 500 to 1000 cp is used. As this coating agent, for example, an acrylic ester resin is used. As a means for reducing the permeability to the inside of the pile yarn 12, the above-described high-viscosity resin is applied and sprayed in the form of a resin coating layer 15a or mist to form a resin spray coat layer 15b. Alternatively, the spray amount is reduced to achieve quick drying and quick drying, and the permeability to the inside of the pile yarn 12 is reduced. The resin coating agent used for the resin coating layer 15a or the resin spray coating layer 15b is an acrylic resin, a urethane resin, an olefin resin, or the like, and particularly an acrylic or olefin resin with little stretchability.

  When the resin sheet layer 15c having the release paper of FIG. 2 (c) on the back surface is pasted instead of the resin spray coat 15b by the spray coating of FIG. 2 (b), the knitted fabric 10 is bonded to the knitted fabric. A resin sheet layer 15c made of a PET sheet having a thickness of 0.5 mm or less formed by applying a fast-drying adhesive on the surface to be adhered or pasting the adhesive on both sides, as described above, and forming a double-sided tape with a small elongation. Paste. In this case, bonding of the releasable resin sheet layer 15c with a quick-drying adhesive or double-sided tape is performed after the knitted fabric 10 is soaped, that is, washed and dried. In view of the manufacturing process and the stability of the product, the resin spray coat layer 15b by spraying is most suitable as an extra load on the knitted fabric 10 in manufacturing.

  Describing the embodiment of claim 1, the cut pile yarn 14b obtained by cutting the loop 12a is made of a spun yarn made of one or more kinds of fibers made of natural fiber, artificial fiber or synthetic fiber, and the gauge number is calculated from the spun yarn. Consists of a loop 12a knitted by a flat knitting machine that forms 20 gauge or more per inch. As shown in the side view of FIG. 1A, the loop 12a is formed from a structure in which the pile yarn 12 falls to an angle in a certain direction. Therefore, since the knitted fabric 10 is covered with the pile yarn 12 that has fallen, a state in which there are few voids in the stitches is formed. Moreover, in the plating pile 11, even if the cut pile yarn 14b is sheared on the tip side of the loop 12a, the cut pile yarn 14b falls down to an angle in a certain direction as shown in FIG. It is held in the state. On the other hand, the weft knitted ground yarn 13 of the knitted fabric 10 is made of the above-mentioned spun yarn, or a spun yarn containing at least a heat-shrinkable fiber or a heat-bonded fiber, and the side surface of FIG. As shown in the figure, the base of the loop 12a of the plating pile 11 is covered with a ground yarn 13 that is a ground yarn to hold the weft knitting. Further, as shown in FIG. 5, an attachment angle 23 of the pile yarn 14 a or the cut pile yarn 14 b that has fallen due to the ground yarn 13 to the inner side 18 in the axial direction of the image carrier 17 a that is the rotating body 17 is 0 ° to 70 °. Or the pile angle 14a or the cut pile yarn at the shaft end 19 of the rotating body 17 with the angle of attachment 23 to the axially inner side 18 of the powder carrier 17b as the rotating body 17 being in the range of 0 ° to 70 °. The powder sealing material 6 is attached to the rotation instruction member 20 so as to be in contact with 14b. In this case, the powder sealing material 6 is attached to the lower part of the bracket 21 in FIG. 5C, and the blade 22 for scraping off the toner 7 which is powder adhering to the surface of the rotating body 17 is provided above the powder sealing material 6. It is arranged. By arranging the cut pile yarn 14b in this way, the flow of the toner 7 as the powder from the shaft end portion 19 to the outside is restricted, and the leakage of the powder from the shaft end portion 19 to the outside is prevented. . That is, the pile angle 14a or the cut pile yarn 14b of the powder sealing material 6 is set to a range of 0 ° to 70 ° with respect to the attachment angle 23 with respect to the inner axial direction 18 of the image carrier 17a or the powder carrier 17b as the rotating body 17. The powder was accurately prevented from leaking by arranging it on the rotating body support member 20 so as to contact the shaft end portion 19 of the rotating body 17 and restricting the flow of the powder. In this case, in order to further prevent hair loss, the base yarn 13 is made of a yarn containing heat-shrinkable fibers or heat-bonding fibers, and a spun yarn having a lot of fluff is used as the pile yarn, and the root of the pile yarn is used as the base yarn. It is supposed to be intertwined.

  The embodiment of claim 2 will be described. The cut pile yarn 14b obtained by cutting the loop pile yarn 14a is cut from the pile yarn 12 constituting the loop 12a as shown in FIG. After that, soaping is performed, and as shown in FIG. 1C, a cut loop 12b is formed in which the fibers of the pile yarn 12 are opened. As shown in the side view of FIG. 1C, the opened cut loop 12b is tilted to an angle in a certain direction. Thus, in the means of the present invention, since the powder sealing material 6 is a flat knitted fabric made of the knitted fabric 10, a cut pile 12b that falls down in a certain direction can be formed naturally, and the number of processing steps can be reduced. In other words, in the flat knitting that is the knitted fabric 10, the loop 12a is already knitted in a certain direction from the time of knitting, so that the sloping process required for the woven fabric can be omitted. Further, since the knitted fabric 10 is easier to wash than the woven fabric, the loop 12a made of the loop pile yarn 14a is cut into a cut pile 12b, and then washed in the soaping process, thereby opening the fibers of the pile yarn 12 between the fibers. Easy to do. As a result of the opening between the fibers as described above, the cut pile 12b of the knitted fabric 10 can eliminate the several splitting steps required in the case of the woven fabric, and the means of the present invention reduces the number of steps. Is planned. As described above, the means of the present invention does not include a hair separation process by mechanical hair splitting, so that hair removal due to hair separation does not occur and hair removal during manufacturing is minimized.

  The embodiment of claim 3 will be described. The powder sealing material 6 is shown in FIG. 3 on the back surface of the high-viscosity resin layer 15 in which the stretchability of the knitted fabric is restricted, that is, the member surface in which the stretchability is restricted. As shown, for example, an elastic body 16 made of a double-sided tape is bonded. By applying the powder sealing material 6 having the elastic body 16 to a place that requires sealing, leakage due to powder sealing can be improved at a low contact load, which is not found in conventional powder sealing materials. .

Further, the embodiment of claim 4 will be described. In the powder sealing material 6 for sealing a wide open space, the surface of the powder sealing material 6 made of weft knitting is provided on the back surface of the means of claim 5 above. An elastic body 16 is provided. By the way, according to the means of claim 6, the elastic body 16 can form a gap where the toner 7 which is powder does not leak under vibration conditions of acceleration of 30 m / s ² at 50% compression or more. By using the foam 16a as the elastic body 16 that satisfies this condition, it is possible to withstand the above vibration conditions in accordance with the load applied to the powder sealant 6 in the mounting gap. As a result, it is possible to cope with the vibration conditions of the toner 7 conveyance and attachment location. Furthermore, since the necessary load applied to the powder sealing material 6 can be arbitrarily adapted to the vibration conditions, the powder sealing material 6 can be applied to a wider range. By the way, as this foam 16a, there are rubber-based sponge and urethane foam, and there are closed cells, open cells, and mixed semi-closed semi-open cells. On the other hand, closed cells are better.

  With respect to the powder sealing material 6 in the present invention, the effect of preventing leakage of the toner 7 was confirmed by experiments. The test apparatus 1 of this experiment is composed of the apparatus shown in FIG. 6, and the toner container 4 is attached to the vibrator 2 at an angle 3, and the toner 7 is put into the toner container 4 and is vibrated by the vibrator 2. It has a structure. In the experiment, the powder sealant 6 of the present invention is attached as a single unit between the toner container 4 and the cover 5 and the load applied to the powder sealant 6 at the height of the powder sealant 6 is measured. It is. At the mounting height of the powder sealing material 6 at the time of measurement, the mounting load is measured by measuring the acceleration in the vibration direction 9 when the toner 7 leaks with the sensor 8.

The following experiment is carried out using the test apparatus 1 and the results will be described.
1. A plating pile 11 made of weft knitting was formed into a knitted fabric 10 of 28 gauge and 50 stitches per inch by using microfiber made of acrylic and cotton. Next, the vibration test of the knitted fabric 10 was conducted with a frequency of 50 Hz and a seal load of 15 g / cm ² , and an experiment on stretchability of the powder sealing material 6 was performed. The experimental results are shown in Table 1 by comparing the expansion / contraction rate (%) and the leak-proof acceleration (m / s ² ). Furthermore, the plating pile knitting vibration test is shown by the graph of FIG. 7 with the elongation (%) of the knitted fabric in this experiment as the horizontal axis and the leakage acceleration (m / s ² ) as the vertical axis.

2. The confirmation of the sealability of the toner 7 by the mounting load of the powder sealant 6 was conducted by changing the acceleration of vibration for each contact load (g / cm ² ) (m / s ² ). Shown in In Table 2, the toner 7 that can be sealed is indicated by ◯, the toner that has been partially sealed is indicated by Δ, and the toner that cannot be sealed is indicated by ×.

As shown in Table 2 (a), by forming a loop 12a of the pile yarn ² , if the acceleration of vibration is 20 m / s ² under a load of 4.4 g / cm ² , a powder seal made of weft knitting The material 6 was able to seal the toner 7, and if the contact load was 70 g / cm ² , the material 6 could be sufficiently sealed up to a vibration acceleration of 40 m / s ² . Therefore, it was found that the powder sealing material 6 made of weft knitting having the loop 12a can seal the toner 7. Furthermore, by cutting the pile yarn 2 into a cut loop 12b, a powder sealing material made of weft knitting is used if the acceleration of vibration is 10 m / s ² even with a load of 0.7 g / cm ^2. No. 6 was able to seal the toner 7, and if the contact load was 13.2 g / cm ² , it could be sufficiently sealed up to a vibration acceleration of 30 m / s ² . Therefore, the flat knitted powder seal material 6 according to the present invention can seal the toner 7 at a low load in the loop 12a, and further cut the pile yarn 2 to seal the toner 7 at an ultra-low load at the cut loop 12b. I was able to verify.

3. As confirmation of the sealing effect of the powder by the relationship between the mounting angle 23 of the powder sealing material 6 on the inner side 18 in the axial direction and the acceleration of vibration, the axial direction of the powder sealing material 6 at a contact load of 13.2 g / cm ² the mounting angle 23 of the inner 18 in the range of 0 ° to 90 °, further acceleration of the vibration is performed by changing the range of ^{10m / s 2 ~50m / s 2} , the results are shown in Table 3. The vibration acceleration was 30 m / s ² when the mounting angle 23 on the inner side 18 in the axial direction was 0 ° to 70 °. Also in Table 3, the toner 7 that can be sealed is indicated by ◯, the toner that has been partially sealed is indicated by Δ, and the toner that has not been sealed is indicated by ×.

  Further, in the above paragraph 0029, it is described that the resin spray coat layer 15b by spraying is most suitable for the back surface of the knitted fabric 10. Therefore, the resin spray coat layer 15b by spraying shown in FIG. Table 4 (a) and (b) show the relationship between the tensile load (g) and the elongation percentage (%) in the case of the gauge direction and the stitch direction in which the film is formed and in the case without the resin spray coat layer 15b. Moreover, the relationship between these tensile load (g) and elongation rate (%) is shown in FIG. As can be seen from Table 4 and FIG. 8, as a result of evaluating the elongation of the knitted fabric 10, when the resin spray coating treatment is not performed, the knitted fabric 10 is remarkably elongated by a slight tensile force. On the other hand, it is possible to remarkably restrict the elongation by applying the resin spray coat layer 15b by spraying.

Further, regarding the sealing performance when the knitted fabric 10 having the loop 12a not cut in the vibration test and the toner leakage test using the rotating jig is the powder sealing material 6, the required load is approximately 200 g / cm ² or less. It was. Furthermore, was evaluated in 450 g / cm ² in actual, not even with 450 g / cm ² problem, the elongation rate of 5% or less, the toner leakage does not occur is confirmed. Therefore, the means of claim 2 is arranged so that the elongation of the powder sealant 6 is 5% or less.

Next, by comparing the loop 12a and the cut loop 12b of the pile yarn 12 of the knitted fabric 10, the difference in presence or absence of the cut of the pile yarn 12 is expressed in terms of the height (mm) from the bottom in FIG. 9 and the repulsive load (g / cm ² ). This is shown in the relationship. In FIG. 9, a difference in thickness due to the cutting of the pile yarn 12 can be seen. The cut loop 12b was formed by cutting the tip of the loop 12a with a shearing machine.

Next, the powder sealing material made of a conventional woven pile and the powder sealing material 6 made of the loop 12a and the cut loop 12b of the knitted fabric 10 of the present invention are compared, and the load necessary for sealing the toner 7 is compared. The relationship between (g / cm ² ) and vibration acceleration (m / s ² ) is shown in the graph of FIG. As can be seen from this graph, the powder sealing material 6 of the present invention can be verified that the powder sealing material 6 comprising the loop 12a can be sealed at a low load of 200 g / cm ² , and the powder comprising the loop 12b. It was verified that the sealing material 6 can be sealed with an ultra-low load of 50 g / cm ² . That is, the powder sealing material 6 made of the loop 12a can be sufficiently achieved with a unit load of 200 g / cm ² or less as a load that can withstand an acceleration of 70 m / s ² , and the powder sealing material made of the loop 12b. No. 6 was able to be sufficiently achieved with a unit load of 50 g / cm ² or less as a load capable of withstanding an acceleration of vibration of 50 m / s ² .

On the other hand, in the graph of FIG. 10, each of the powder sealing materials made of the woven fabrics of Conventional 1 and Conventional 2 requires 330 g / cm ² or more as a load capable of withstanding an acceleration of 38 m / s ² of vibration.

Furthermore, the relationship between the repulsive load and the sealing property when the powder sealing material 6 and the elastic body 16 comprising the cut loop 12b of the present invention are bonded together as shown in FIG. ² ) and a graph showing the relationship between the height (mm) from the bottom of the powder sealant 6 including the tape of the elastic body 16. In this case, the vibration test condition was a vibration acceleration of 50 m / s ² . In FIG. 11, the leakage: OK region means that the toner 7 does not leak to the outside at an acceleration of vibration of 50 m / s ² , and therefore, as shown in FIG. 11, by the flat knitting that is the knitted fabric 10 of the present invention. It was found that by using the powder sealing material 6 composed of the cut loop 12b, the use range under conditions that do not leak can expand the height from the bottom of the powder sealing material 6 including the tape of the elastic body 16 to 3.5 mm. .

It is assumed that an elastic body 16 for restricting powder leakage is provided on the back surface of the knitted fabric 10 under the high-viscosity resin layer 15 in which the stretchability of the knitted fabric 10 is regulated. In this case, when the foam 16 a is provided as the elastic body 16, the foam bubbles include closed cells, open cells, and mixed semi-closed semi-open cells. Among these, closed cells are powdered. The blocking power for leak prevention was the highest. When the foam leakage test was carried out by changing the material of the foam, as shown in FIG. 12, even if the foam was an open cell, it was 30 m with a contact load of 50% or higher compression rate. It has been shown to withstand vibration with acceleration of / s ² . That is, in the contact load in the range of 50% or more compression load or compressive load ^{10g / cm 2 ~500g / cm 2} , under the vibrational acceleration of 30 m / s ² leakage of the powder could be prevented. In FIG. 12, rubber sponge A has a density of 100 kg / m ³ , rubber sponge B has a density of 140 kg / m ³ , rubber sponge C has a density of 100 kg / m ³ , urethane foam A has a weight of 28 kg / m ³ , and urethane foam B has a density of 100 kg / m ³ . Was 32 kg / m ³ , and urethane foam C was 57 kg / m ³ .

BRIEF DESCRIPTION OF THE DRAWINGS It is the figure which expands and shows typically the structure of the pile yarn and ground yarn of the weft knitting plating pile of this invention, (a) is the side view and top view before cutting of a pile yarn, (b) is The side view and plan view after cutting the pile yarn, (c) is a side view and plan view after opening the cut pile yarn. The side view which expands and shows typically the weft knitted fabric which has the cut pile yarn which has a resin layer on the back, (a) is a resin layer, and (b) is a resin spray coating layer. It is. It is the side view which expands and shows typically the weft knitted fabric which has the cut pile yarn which formed the elastic body in the back surface of the resin layer, (a) is the figure which formed the elastic body in the resin coating layer, (b) These are the figures which formed the elastic body in the resin spray coat layer. The side view which shows the shape of the pile yarn of a powder sealing material by the difference of the gauge and stitch of a knitted fabric, and a figure which expands a top view typically, (a) consists of a gauge 28 and a stitch 50, (b) Is composed of a gauge 28 and a stitch 25, and (c) is composed of a gauge 20 and a stitch 50. FIG. 6 is a schematic diagram in which a powder seal material in which a cut pile yarn is tilted inward in the axial direction is provided at the shaft end of the rotary body, and (a) is a front view schematically showing only the powder seal material in an enlarged manner. FIG. 4B is an enlarged front view schematically showing the rotating body powder sealing material, and FIG. 4C is a schematic view seen from the shaft end side of the powder sealing material provided on the rotating body and the rotation support member. FIG. It is a side view which shows typically the test apparatus of the leak by the vibration of a powder sealing material in a partial cross section. It is a graph which shows the relationship between the elongation rate (%) of a knitted fabric by a vibration test of a plating pile knitted powder seal material, and leak-proof acceleration. The relationship between each tensile load (g) and elongation rate (%) in the case of the gauge direction and the stitch direction in which the resin spray coat layer 15b is formed and in the case without the resin spray coat layer 15b is shown. By comparing the loop 12a and the cut loop 12b of the pile yarn 12 of the knitted fabric 10, the difference in presence or absence of the cut of the pile yarn 12 is shown by the relationship between the height from the bottom (mm) and the repulsive load (g / cm ² ). It is a graph which shows the relationship between the load required for the sealing of the toner in each powder sealing material of the pile yarn of the conventional woven fabric, and the pile yarn of the knitted fabric of this invention, and the acceleration of a vibration. It is a figure which shows sealing performance by the relationship between the repulsive load and the height of a base when an elastic body is bonded together to the powder sealing material of this invention. It is a figure which shows the relationship between the foam compressibility in the leak test of a foam, and the acceleration of vibration resistance.

DESCRIPTION OF SYMBOLS 1 Test apparatus 2 Exciter 3 Angle 4 Toner container 5 Cover 6 Powder seal material 6a End seal material 6b Shaft seal material 7 Toner 8 Sensor 9 Vibration direction 10 Knitted fabric 11 Pile pile 12 Pile yarn 12a Loop 12b Cut loop 13 Ground yarn 14 Pile yarn 14a Loop pile yarn 14b Cut pile yarn 15 Resin layer 15a Resin coating layer 15b Resin spray coat layer 15c Sheet layer 16 Elastic body 17 Rotating body 17a Image carrier 17b Powder carrier 18 Axial inner side 19 Axis end Part 20 Rotating body support member 21 Bracket 22 Blade 23 Mounting angle

Claims (4)

  An image carrier, in which a loop made of pile yarn or a cut loop formed by cutting the loop is formed on one side of a flat knitted fabric made of pile yarn and ground yarn to form a powder seal material, and the powder seal material is a rotating body Alternatively, an end seal material of the powder carrier or a shaft seal material that comes into contact with the rotating body, and further, a loop or cut loop of a knitted fabric made of pile yarn and ground yarn having a loop or cut loop formed on one side is formed. The structure in which the stretchability of the knitted fabric is regulated as a surface different from the surface on which the knitted fabric has a loop or a pile yarn having a cut loop cut from the loop and a knitted loop formed from a ground yarn or a single surface having a cut loop is used as the surface. A resin coating layer by coating on the back of the knitted fabric, a resin spray coating layer by spraying in the form of a mist, or a thin resin sheet and an adhesive or nonwoven fabric and an adhesive. In the powder sealing material having a structure in which the stretchability is restricted consisting of a structure in which a sheet layer is formed, and the elongation due to a predetermined tensile load or contact friction of the structure in which the elasticity of the knitted fabric is restricted is 5% or less. Further, a pile yarn having a loop or a cut loop obtained by cutting the loop is a flat knitting machine having a gauge number of 20 gauge or more per inch from a spun yarn composed of one or more kinds of fibers made of natural fibers, artificial fibers or synthetic fibers The loop or the cut loop formed from the loop is tilted in one direction on one side of the knitted fabric, and is an image carrier or powder carrier of the fallen loop or cut loop. The angle of attachment of the rotator to the inner side in the axial direction is set in the range of 0 ° to 70 ° so that the loop or the cut loop comes into contact with the end of the rotator that is an image carrier or a powder carrier. And location to regulate the flow of the powder, the image bearing member or powder carrier in a rotating body powder sealing material using the knitted fabric, characterized in that to prevent leakage of the powder from the end of. The knitted fabric according to claim 1 , wherein the cut loop formed from the pile yarn is a cut loop that is opened in a soaping and then opened after cutting a fallen loop in a predetermined direction . Powder seal material.   A pile yarn having a loop or an opened cut loop is formed to have a desired contact load by further providing an elastic body on a high-viscosity resin layer in which the stretchability of the knitted fabric is restricted. A powder sealing material using the knitted fabric according to claim 1 or 2. Elastic body further provided on the resin layer of high viscosity regulating the elasticity of the formed on the rear surface of the knitted fabric, 30 m in the contact load in the range of 50% or more compression load or compressive load ^{10g / cm 2 ~500g / cm 2} / powder sealing material using the knitted fabric according to claim 3 under vibration acceleration of s ^2, characterized in that it consists of foam to prevent leakage of powder.

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