JP2013155032A - Blade member and bladed wheel used for paper-sheet conveying/accumulating member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blade member used for a bladed wheel for conveying and accumulating paper sheet in which a beating sound by the blade member is reduced and is excellent in durability.SOLUTION: In a blade member used for a bladed wheel for conveying/accumulating paper sheets wherein the blade members are radially attached to a cylindrical member, a base end part at which a bulge part is formed is an attaching part, and the blade member for the bladed wheel is a synthetic resin-made blade member formed by cast molding, and is extended in the another end side, while the synthetic resin is thermosetting urethane and a core wire is arranged in the longitudinal direction of the blade member.

Description

  The present invention relates to an impeller for paper sheet conveyance and accumulation used to convey and accumulate paper sheets such as banknotes, magnetic cards, and tickets in automatic ticket gates, cash deposit machines, money changers, automatic ticket issuing machines, and the like. .

In automatic ticket gates, cash deposit machines, money changers, automatic ticketing machines, etc., in the process of transporting banknotes, magnetic cards, tickets, etc., impeller shape for transporting and stacking such paper sheets while transporting them The rubber member (hereinafter referred to as a paper sheet conveying and accumulating member) is used. As shown in FIG. 1, the sheet transporting and accumulating member includes a plurality of thin blade-like blade members 1 having rubber elasticity on the outer periphery of a cylindrical member 2.
The paper sheet conveying and accumulating member is configured to convey and accumulate paper sheets by being struck and rubbed against the paper sheet while being rotated at a high speed. Wear and tearing occur. The blade member is required to have wear resistance and resistance to tearing. Since the blade member is easily consumed, a structure that can be attached in a replaceable manner has also been proposed. For example, a structure is used in which a slit is formed in a cylindrical member, and a base end portion of a blade member is detachably attached to the slit.
As a conventional example, there has been proposed a blade member obtained by vulcanizing and molding a kneaded rubber type resin into a flat plate shape, in which a woven fabric or a core wire is disposed inside the blade member.

  Patent Document 1 (Japanese Patent No. 4492994) proposes a blade conveying and accumulating blade member made of a rubber-like elastic body having a polyester or nylon color as a core material. The durability of the blade member is improved by using a woven fabric as a core material, but the rigidity is increased, and the sound generated when the blade member is struck against a paper sheet is increased. Patent Document 2 (Japanese Patent Laid-Open No. 10-72517) proposes a kneaded urethane blade member having rubber elasticity. As an example of the banknote processing machine using the paper sheet conveying and accumulating member, there are Patent Document 3 (Japanese Patent No. 4409502) and Patent Document 4 (Japanese Patent Laid-Open No. 9-151209).

Japanese Patent No. 4492994 Japanese Patent Laid-Open No. 10-72517 Japanese Patent No. 4409502 Japanese Patent Application Laid-Open No. 9-151009

  This invention makes it a subject to develop the blade member and impeller used for the impeller for paper sheet conveyance integration | stacking excellent in durability which suppressed the tapping sound of a blade member.

The present invention focuses on a thermosetting urethane resin of a type that is molded by casting, and provides a blade member that is excellent in durability by arranging a core wire in the longitudinal direction while suppressing sound by softening the contact with a paper sheet. It is an invention to be provided. The main configuration of the present invention is as follows.
1. In the blade member used in the impeller for paper sheet conveyance and accumulation in which the blade member is attached radially to the cylindrical member, the base end portion where the bulging portion is formed is an attachment site, and the note is extended to the other end side. A synthetic resin blade member formed by a mold,
A blade member for an impeller, wherein the synthetic resin is thermosetting urethane and the core wire is disposed in a longitudinal direction of the blade member.
2. 1. An uneven surface is provided on the surface of a blade member that rubs against a paper sheet. The blade member according to the description.
3. 1. The hardness of urethane is JIS A 40-90 degrees. Or 2. The blade member according to the description.
4). 1. Urethane is an ether urethane. ~ 3. The wing | blade member in any one of.
5. 1. Aramid twisted yarn is used as the core wire. ~ 4. The wing | blade member in any one of.
6.1. ~ 5. An impeller for collecting and conveying paper sheets, wherein the blade member according to any one of the above is detachably attached to a cylindrical member.
7). Two cylindrical members inside and outside are arranged at intervals, and this interval is used as a casting cavity, and a thermosetting urethane resin is cast into the cavity, and the resin is cured and then removed from the mold. A method for producing a thermosetting urethane blade member by cutting cylindrical urethane.
8). As the inner cylindrical member, an inner cylindrical member formed on the surface with a concave portion corresponding to the bulging portion for the base end portion for mounting and a concave and convex portion corresponding to the concave and convex portions formed on the side rubbing against the paper sheet is used.
6. A core wire is wound around the surface of the inner cylindrical member, and then the outer cylindrical member is extrapolated and two inner and outer cylindrical members are arranged at intervals. A method for producing the thermosetting urethane blade member as described.
9. A method of manufacturing a thermosetting urethane blade member using a flat mold, in which a mold is formed by arranging upper and lower molds, and a cavity forming space of one mold is formed. A large number of hooks are formed on the opposing inner wall side, a core wire is stretched on this hook, a mold is assembled, a thermosetting urethane resin is cast, and after the resin is cured, the mold is removed and thermosetting is performed. A method for producing a urethane blade member.

1. According to the present invention, the thermosetting urethane blade member in which the core wire is disposed in the longitudinal direction can improve durability while softening the contact with the paper sheet and suppressing sound. Hydrolysis-resistant ether-based urethane has little deterioration. The hardness of urethane is preferably JIS A 40 to 90 degrees, more preferably JIS A 60 to 75 degrees. Thermoplastic urethane is not suitable because it has poor resilience and tends to buckle.
2. By forming irregularities on the surface of the blade member that rubs against the paper sheet, the blade member is easy to bend, touches softly, reduces the sound, and realizes a smooth feeding action.
3. By using an aramid fiber for the core wire, durability can be particularly improved.
4). The impeller, which has a blade member detachably attached to a cylindrical hub member, is a quiet type and has improved durability, reducing the maintenance burden.
5. By using a flat mold or a cylindrical mold, a stable quality blade member can be manufactured at low cost. The bulge part and unevenness | corrugation of a blade member can be formed in an inner metal mold | die. In the kneading type elastic urethane, the core member or woven cloth is interposed between two well-kneaded unvulcanized rubbers and vulcanized to form a single piece, forming a rubber elastic blade member. Quality varies and productivity is inferior.

It is a schematic diagram of an impeller for paper sheet conveyance accumulation. It is a schematic diagram of an impeller member. It is a schematic diagram of a testing machine. It is a schematic diagram of the form of a blade member.

The present invention focuses on a thermosetting urethane resin of a type that is molded by casting as a blade member used in an impeller for paper sheet conveyance and accumulation, and softens the contact with the paper sheet to suppress sound, while maintaining the core in the longitudinal direction. It is invention which provides the blade member excellent in durability by arrange | positioning, and the impeller assembled | attached to it.
When transporting, stacking, or stacking bills, the paper sheet transport device is brought into contact and transported by friction so that blade members attached radially to the rotating shaft are struck against the bills, etc. The A blade member formed into a strip-shaped long piece having a width of 2 to 10 mm, a length of 20 to 50 mm, and a thickness of 1 to 4 mm is attached to a cylindrical shaft member to constitute an impeller. Since the blade member is worn or damaged, it is often attached so as to be detachable from the cylindrical shaft member (hub member). The number of blade members used radially is not particularly limited, but is about 2 to 16 pieces.
The inventor of the present invention has focused on the need to develop a device that also considers the influence on the transport device and the transported paper sheet. That is, the paper sheet transport device is built in an automatic ticket gate, a cash deposit machine, a money changer, an automatic ticketing machine, and the like, and maintenance performance and quietness are required. In addition, the bill repeatedly passes through such a transport device, and bill recognition is required. Therefore, research and development was conducted with a focus on the fact that measures against failure on the device side and prevention of banknote wear would be required.

An example of an impeller is shown in FIG. A plurality of blade members 1, 1,... Are attached radially to a cylindrical member 2 serving as a hub to form an impeller 3. The cylindrical member 2 is formed with a slit for inserting and locking the base of the blade member 1.
An example of an impeller member is shown in FIG. 2A shows a longitudinal section of the blade member, FIG. 2B shows a transverse section, and FIG. 2C shows the cylindrical member 2 serving as a hub. As described above, the blade member 1 has a long piece shape, and a base side that is locked to the cylindrical member is provided with a retaining shape such as a swollen bulging portion 13. The thin piece portion 11 extends from the base side, and the core wire 12 is arranged in the longitudinal direction inside. A convex portion 14 can be formed on the rubbing surface side of the blade member. By providing the unevenness, it is easy to bend when it is struck, and the frictional locking force with the banknote is improved, so that there is little slip and good conveyance can be achieved. The bulge of the base of the blade member may be either vertical or diagonal. The cylindrical member 2 provided with the shaft hole through which the rotation shaft is inserted is formed with a notch having a shape for holding the bulging portion 13 formed at the base portion of the blade member 1. The bulging part is inserted and fixed in this notch part, and it is formed so that replacement maintenance is possible by wear or the like. In the example of FIG. 2 (c), four blade members can be attached to one side, and four blade members can be attached to the other side, forming an impeller with eight blade members. be able to.
By arranging the core wire 12 in the longitudinal direction on the blade member, it can be bent flexibly. When a woven fabric is used for the core material, the rigidity becomes high, the contact is strong, the sound is loud, and the banknotes are also quickly worn.

[About urethane]
In the present invention, a blade member is formed by a casting method using a thermosetting urethane resin.
Thermosetting urethane is excellent in rubber elasticity, and can obtain a uniform molding material with fewer steps. Conventionally, a method has been used in which a rubber material is well kneaded and pressed into a mold and vulcanized. Since a core material such as a woven fabric is interposed, it is prepared in the form of two sheets of upper and lower sheets, and the core material is laminated on a sandwich and pressed with a mold and vulcanized.
In the casting method, it is not necessary to knead, and nonuniformity due to maturity of kneading can be avoided.
The hardness of urethane is JIS A 40 to 90 degrees, preferably JIS A 60 to 75 degrees. Some degree of hardness is required. When the rubber hardness is low, the blade member is likely to buckle and the restorability is poor. If it is too hard, the blade member becomes stiff, the hitting becomes strong, the sound cannot be suppressed, and the bills are also quickly worn.
As the type of urethane, ether-based thermosetting urethane is suitable. Ether-based urethanes are resistant to hydrolysis, have little change over time, and have excellent durability. Thermoplastic urethane is not suitable for the casting type.
You may add a plasticizer, a coloring agent, antioxidant, etc. to urethane.

By reacting poly (tetramethylene ether) glycol having an average molecular weight of 2 and 2 functional groups with toluene diisocyanate, NCO% 2.4% prepolymer and methylenebis-o-chloroaniline (MOCA) isocyanate group in the prepolymer Dilute with a dioctyl phthalate so that the hardness of the cured product is 60 degrees, and weigh and mix so that the ratio between the number of moles of amino acid and the number of moles of amino groups in MOCA is 100: 95. To do.
For the aramid core wire, Kevlar 29 T964 manufactured by Toray DuPont is used as a 200 denier twisted yarn, and a cord outer diameter of 0.25 mm is used. An aramid core wire is wound around a cylindrical mold, and ether-based thermosetting urethane is injected into the mold to form a cylindrical composite. A cylindrical molded product is cut into a width of 3 mm and further cut into a length of 30 mm to obtain a blade member. The central cylindrical part is made of polyacetal, and a molded product with cuts on all sides is obtained. An impeller as shown in FIG. 1 is obtained by attaching and fixing the blade member to the cylindrical portion.

[About core material]
The core material is oriented in the longitudinal direction using a twisted yarn as a core wire. As the core wire, aramid fiber twisted yarn is suitable. Aramid fiber has high strength and improved durability against damage to the blade member. Preferably, a 200-denier twisted yarn with a cord outer diameter of 0.18 to 0.31 mm is used. The number of core wires shall be a minimum of 1 to a maximum of 9. For example, Kevlar29 T964 made by Toray DuPont can be used as an aramid core wire.

[About molding]
The blade member forming means uses a cylindrical mold using a double cylinder or a flat mold which is a split mold.
Wrap the core wire around the cylindrical mold that becomes the inner cylinder, extrapolate the cylindrical mold that becomes the outer cylinder, inject the thermosetting urethane resin into the space between the two cylinders, cure, demold, and cylinder Molded composite. A cylindrical molded product is cut in the width direction and the length direction to obtain a blade member. An impeller as shown in FIG. 1 is manufactured by attaching the blade member to the cylindrical portion.
The shape of the blade member can be formed by forming the concave portion forming the bulging portion of the blade member and the unevenness of the rubbing surface on the surface of the cylindrical mold serving as the inner cylinder.

  The flat mold is a flat mold in which a cavity space is formed. A core wire is placed on a linear mold, and thermosetting urethane is injected into the mold to form a linear composite. A linear molded product is cut in the length direction to obtain a blade member. An impeller as shown in FIG. 1 is manufactured by attaching the blade member to the cylindrical portion.

[Example 1]
A vane member was obtained by combining an ether-based thermosetting urethane having a hardness of JIS A 60 degrees and an aramid core wire.
By reacting poly (tetramethylene ether) glycol having an average molecular weight of 2 and 2 functional groups with toluene diisocyanate, NCO% 2.4% prepolymer and methylenebis-o-chloroaniline (MOCA) isocyanate group in the prepolymer Dilute with a dioctyl phthalate so that the hardness of the cured product is 60 degrees, and weigh and mix so that the ratio between the number of moles of amino acid and the number of moles of amino groups in MOCA is 100: 95. To do.
For the aramid core wire, Kevlar 29 T964 manufactured by Toray DuPont is used as a 200 denier twisted yarn, and a cord outer diameter of 0.25 mm is used.
An aramid core wire is wound around a cylindrical mold, and ether-based thermosetting urethane is injected into the mold to form a cylindrical composite.
A cylindrical molded product is cut into a width of 3 mm and further cut into a length of 30 mm to obtain a blade member. The central cylindrical part is made of polyacetal, and a molded product with cuts on all sides is obtained. An impeller is obtained by attaching and fixing a blade member to a hub which is a cylindrical member.

[Example 2]
A blade member was obtained from ether-based thermosetting urethane having a hardness of JIS A 75 degrees and an aramid core wire.
By reacting poly (tetramethylene ether) glycol with an average molecular weight of 2 and 2 functional groups with toluene diisocyanate, the prepolymer with 2.4% NCO% and the methylenebis-o-chloroaniline (MOCA) in the prepolymer The mixture is weighed so that the ratio of the number of moles of the amino group to the number of moles of amino groups in MOCA is 100: 95, and the mixture obtained by dissolution and mixing is cast.
Other than that was the same as Example 1.

Example 3
A vane member was obtained by combining an ether-based thermosetting urethane having a hardness of JIS A 40 degrees and an aramid core wire.
Ether-based thermosetting urethane is made by reacting poly (tetramethylene ether) glycol having an average molecular weight of 2 and 2 functional groups with toluene diisocyanate to make NCO% 2.4% and methylenebis-o-chloroaniline (MOCA). And triisopropanolamine (TIPA) weighed so that the ratio of the number of moles of isocyanate groups in the prepolymer to the number of moles of amino groups in MOCA and the number of moles of hydroxyl groups in TIPA was 100: 45: 50 Is diluted with dioctyl phthalate so that the hardness of the cured product is 40 degrees, dissolved, mixed and cast.
Other than that was the same as Example 1.

Example 4
A blade member was obtained from ether-based thermosetting urethane having a hardness of JIS A 90 degrees and an aramid core wire.
By reacting poly (tetramethylene ether) glycol with an average molecular weight of 2000 and 2 functional groups with toluene diisocyanate, the prepolymer with NCO% of 4.2% and the methylenebis-o-chloroaniline (MOCA) in the prepolymer The mixture is weighed so that the ratio of the number of moles of the amino group to the number of moles of amino groups in MOCA is 100: 95, and the mixture obtained by dissolution and mixing is cast.
Other than that was the same as Example 1.

[Comparative Example 1]
A blade member was obtained from an ester-based thermosetting urethane having a hardness of JIS A 75 degrees and an aramid core wire.
Example 2 was the same as Example 2 except that urethane was changed to ester-based thermosetting urethane.

[Comparative Example 2]
A blade member was obtained with ether-based thermosetting urethane having a hardness of JIS A 95 degrees and an aramid core wire.
The procedure was the same as Example 4 except that the NCO% of urethane was 6.3%.

[Comparative Example 3]
Hardness JIS A 75 degree ether-based thermosetting urethane and 70 denier twisted yarn were used, and a blade member was obtained with a polyester core wire (Teijin Diafeather Tetoron Filament) having a cord outer diameter of 0.18 mm. Example 2 was the same as Example 2 except that the core wire was changed to polyester.

[Comparative Example 4]
Hardness A wing member was prepared using a woven fabric composed of ether-based thermosetting urethane of JIS A 75 degrees and polyester yarn (warm and weft 100 denier) (Teijin Tetoron) as a core material. An impeller assembled with four blade members shown in FIG. 1 was created. Example 2 was the same as Example 2 except that the core wire was changed to a polyester woven fabric.

<Evaluation test>
Fig. 3 shows the testing machine. Using the testing machine 100, the impeller 3 having four blade members mounted on the hub was rotated at 2000 rpm, and the blade member 1 was struck against the stainless steel plate 110 to evaluate the performance. Separately, the blade member was beaten against a simulated banknote bundle to evaluate the degree of sound and banknote wear. FIG. 4 shows the use state of the blade member. Since the blade member continues to rotate in one direction, the blade member bends, the initial length L is bent to L ′ length by the rotation, and is struck against the paper sheet, and is in a friction feed state. If the bending wrinkles become large, the conveyance performance will drop, causing trouble. Therefore, there is a need for a resilience that gently touches to reduce the hitting sound and is less likely to bend. The evaluation results are shown in Table 1.

(Evaluation criteria)
(1) Wear evaluation criteria ◎: The blade member has no wear marks.
○: There are wear marks.
×: Core wire exposed
(2) Breakage evaluation criteria ○: The blade member is not scratched,
×: Scratches and cracks
(3) Restorability evaluation criteria ○: Ratio of length L ′ after rotation / length L before rotation is 95% or more,
×: Ratio of length L ′ after rotation / length L before rotation is less than 95% (including the case where the root is completely bent)
(4) Sound evaluation criteria ◎: Less than 80dB,
○: 80-85dB
×: Over 85dB
(5) Banknote wear degree evaluation criteria ◎: No banknote wear,
○: Less wear powder on banknotes,
X: Abrasion dust on banknotes (including the case where banknotes fray)

(Evaluation test method)
The following evaluation was performed using the testing machine 100 shown in FIG.
(1) Evaluation of wear:
After rotating the impeller for 500 hours, the state of the tip of the blade member was observed.
(2) Evaluation of damage:
After rotating the impeller for 500 hours, the state of the blade member was observed.
(3) Restorability evaluation:
The impeller was rotated 24 hours → stopped for 24 hours → rotated for 24 hours → stopped for 24 hours →, and after 10 sets of rotation and stop, the deformation of the blade member was compared.
(4) Sound evaluation:
The sound generated when the blade member was rotated for 10 minutes was evaluated with a sound level meter.
(5) Degree of banknote wear:
After rotating the impeller for 500 hours, the state of the banknote was observed.

As a result of these evaluation tests, the blade member cast and integrally molded using thermosetting urethane is excellent in wear resistance, damage resistance, and resilience, and the sound generated when struck is suppressed, and the wear of banknotes is reduced. It was confirmed that there were few.
On the other hand, in Comparative Example 1 using the ester-based thermosetting urethane, the generation of sound is suppressed, but the restoring property is poor, and the result is that it is weak against breakage and wear. This is considered to be due to the fact that ester-based thermosetting urethane is highly hydrolyzable and has poor temporal stability. In Comparative Example 2 in which the hardness is raised to JIS A 95 degrees, the abrasion resistance and the resilience are good, but the rigidity due to the hardness influences the generation of sound, brittleness, and damage to the banknote. There is a tendency to encourage. It was confirmed that the blade member using the polyester core wire has poor recoverability and is easily damaged. The blade member using the polyester woven fabric as the core material improves the restoration property but does not suppress noise. Although this improves rigidity, there is no suppleness and it is assumed that a shocking hit occurs.
As a result, the impeller using the blade member of the present invention is a quiet type in which the generated sound is suppressed, and the durability is improved and the number of maintenance can be reduced.

  The blade member of the present invention can be used in a paper sheet conveying apparatus that conveys and accumulates paper sheets such as banknotes, magnetic cards, and tickets in automatic ticket gates, cash deposit machines, money changers, automatic ticket issuing machines, and the like. it can.

DESCRIPTION OF SYMBOLS 1 wing | blade member 11 thin piece part 12 core wire 13 bulging part 14 convex part 2 cylindrical member 3 impeller 100 testing machine 110 stainless steel plate

Claims (9)

In the blade member used in the impeller for paper sheet conveyance and accumulation in which the blade member is attached radially to the cylindrical member, the base end portion where the bulging portion is formed is an attachment site, and the note is extended to the other end side. A synthetic resin blade member formed by a mold,
A blade member for an impeller, wherein the synthetic resin is thermosetting urethane and the core wire is disposed in a longitudinal direction of the blade member.   2. The blade member according to claim 1, wherein unevenness is provided on a surface of the blade member that rubs against the paper sheet.   The blade member according to claim 1 or 2, wherein the hardness of the urethane is JIS A 40 to 90 degrees.   The blade member according to any one of claims 1 to 3, wherein the urethane is an ether-based urethane.   The blade member according to any one of claims 1 to 4, wherein an aramid twisted yarn is used as the core wire.   An impeller for paper sheet conveyance and accumulation, wherein the blade member according to any one of claims 1 to 5 is detachably attached to a cylindrical member.   Two cylindrical members inside and outside are arranged at intervals, and this interval is used as a casting cavity, and a thermosetting urethane resin is cast into the cavity, and the resin is cured and then removed from the mold. A method for producing a thermosetting urethane blade member by cutting cylindrical urethane. As the inner cylindrical member, an inner cylindrical member formed on the surface with a concave portion corresponding to the bulging portion for the base end portion for mounting and a concave and convex portion corresponding to the concave and convex portions formed on the side rubbing against the paper sheet is used.
8. The thermosetting urethane vane member according to claim 7, wherein after the core wire is wound around the surface of the inner cylindrical member, the outer cylindrical member is extrapolated and two inner and outer cylindrical members are arranged at intervals. How to manufacture.   A method of manufacturing a thermosetting urethane blade member using a flat mold, in which a mold is formed by arranging upper and lower molds, and a cavity forming space of one mold is formed. A large number of hooks are formed on the opposing inner wall side, a core wire is stretched on this hook, a mold is assembled, a thermosetting urethane resin is cast, and after the resin is cured, the mold is removed and thermosetting is performed. A method for producing a urethane blade member.

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