JP6709474B2 - Paper transport device - Google Patents

Description

The present invention relates to a paper sheet transporting device that transports a paper sheet from an upstream side to a downstream side by a transport pipe in which a transport fluid flows from upstream to downstream.

Conventionally, when conveying thin paper or paper cards such as paper cards and banknotes, there is known a paper sheet conveying device that sandwiches the paper sheet with a belt or a roller and sends it out. ing. For example, in a game arcade where game machines such as pachinko and slot machines are installed, a game medium lending device or the like is provided adjacent to the game machine, without banknotes being stocked in this game medium lending device. A paper sheet transporting device is used when the bills are transported to and managed by a bank safe. In the paper sheet transporting device of the amusement hall, the bills discriminated by the bill discriminating unit such as the game medium lending device are taken in and attached to the island edge of the gaming island where the gaming machine is installed by the transport mechanism including belts and rollers. It is transported to the bank safe.

In such a paper sheet transporting device, since a mechanism for sandwiching a banknote by a belt or a roller is used to transport the banknote, there is a problem that the banknote is often jammed at a connecting portion of the belt and the roller. In order to clear a banknote jam, it is necessary for a player who is playing a game on a gaming machine to interrupt the game, identify the defective part on the game island, and remove the jammed banknotes, which causes annoyance to customers. At the same time, the burden on the game shop staff was not small.

In recent years, there has been proposed a paper sheet transporting apparatus that transports a bill by generating a transporting air stream in a transport tube and placing it on the air stream. If the banknotes are transported by airflow, there is no risk that the banknotes will be jammed in the mechanical parts, because no mechanism such as belts or rollers is used. As an air-conveying paper sheet conveying device, one in which a bill is smoothly conveyed by deforming a rear end portion of a bill and applying wind pressure of an air flow for conveyance to the deformed portion is proposed (for example, , Patent Document 1). In addition, by arranging a lightweight transport auxiliary body behind the banknote and sending out the transport auxiliary body in the transport direction by the air flow, the transport auxiliary body pushes the banknote from the rear side in the transport direction, and indirectly transports the banknote. A realized paper sheet transporting device has also been proposed (for example, see Patent Document 2).

Further, if the paper sheets are directly conveyed by the air flow, there is a problem that the air flow cannot be received in the conveying direction, and the bills are adsorbed on the inner wall surface of the conveying pipe and cannot be conveyed. The basic principle of such sheet adsorption will be described with reference to FIG. The conveyance pipe 102 that functions as a paper sheet conveyance path is a flow path surrounded by four side walls (left side wall 1021, right side wall 1022, upper wall 1023, and lower wall 1024), and the blowing direction from the upstream side to the downstream side. The WD carrier flow continues to flow.

When the carrier flow flows in the carrier pipe 102, pressure is generated in a direction orthogonal to the air blowing direction WD. Pressure Pl acts on the inner wall surface of the left side wall 1021, pressure Pr acts on the inner wall surface of the right side wall 1022, pressure Pt acts on the inner wall surface of the upper wall 1023, and pressure Pu acts on the inner wall surface of the lower wall 1024. , The force increases in proportion to the square of the velocity of the carrier flow. Since the paper sheet is thin, it is difficult to receive the conveying flow from the trailing edge, and the upper and lower edges are not subjected to the forces of the vertical pressures Pt and Pu. However, the two surfaces of the paper sheet are greatly affected by the pressures Pl and Pr toward the left side surface 1021 and the right side surface 1022 that face each other.

Therefore, the paper sheets will stick to the inner wall surfaces of the left and right side walls 1021 and 2022 due to the pressures Pl and Pr. In addition, when the transport flow flowing along both sides of the thin paper sheet is balanced, the paper sheet is not attracted to the left and right side walls 1021 and 2022, but when a slight difference occurs in the transport flow, There is a difference in pressure applied to the side surface of the leaf, and the leaf is attracted to the side of weak pressure and contacts the inner wall surface. Since the frictional force between the left and right side walls 1021 and 2022 of the contacted paper sheets exceeds the force of the transport flow, the paper sheets stay adsorbed on the inner wall surface and remain stagnant and are not transported downstream.

In order to prevent bills from being attracted to the inner wall surface due to such a cause derived from the transport pipe structure, there is also a paper sheet transporting device which is designed so as to generate a wall flow along the wall surface so that the bills are not attracted to the wall surface. It has been proposed (for example, see Patent Document 3).

Japanese Patent No. 4130697 Japanese Patent No. 5563883 Japanese Patent No. 6339732

However, the inventions described in Patent Documents 1 to 3 have the following problems.

In the invention described in Patent Document 1, since the bills to be conveyed have different habits, wrinkles, wrinkles, strength of elasticity, etc., for each bill, the deformed shape to be maintained during conveyance is constant. However, it was a cause of clogging in the carrier pipe. Further, since it is necessary to extend the banknotes that have been deformed for transportation after the transportation, there is also a problem that deterioration of the banknotes is accelerated by repeatedly deforming and expanding the banknotes.

In the invention described in Patent Document 2, since the bill is forcibly pushed out by using the pushing unit, when the bill is strongly attracted to the inner wall surface, the bill is compressed and deformed, which causes a jam in the transport pipe. At the same time, there is a problem that fatal damage is added to bills. Further, the pushing unit method adopted by the invention described in Patent Document 2 is easily affected by the air volume, and is not suitable for carrying a curved portion or carrying a long distance. Further, in the invention described in Patent Document 2, insufficient strength of the transport assisting body also becomes a problem, and the transport assisting body is deformed or damaged due to a collision or the like in the bill collecting unit, and it stops on the flow path. Therefore, it requires regular replacement.

As described above, the inventions described in Patent Document 1 and Patent Document 2 have a large problem that stable transport of paper sheets by the transport flow cannot be expected. In contrast to these inventions, the invention described in Patent Document 3 is disclosed as a banknote that can be stably conveyed by preventing a banknote from sticking to the side wall and accumulating by creating a wall flow along the wall surface. ing. The schematic structure of the invention described in Patent Document 3 will be described with reference to FIG. A pair of opposed plates 104, 104 are provided in a transfer pipe 102 that transfers an object 103 to be conveyed, and a transfer path 105 is formed between the opposed plates 104 and 104. And the air flow paths 106, 106 are formed between them. In the counter plate 104, the through-holes 104a that are wall flow generating portions are arranged in a zigzag pattern, and the air flow that has flowed from the air flow path 106 to the transport path 105 flows along the wall surface Fs. In other words, the wall flow Fm is generated on both sides (both side surfaces of the transported object 103) of the transport flow Fm, which is the main airflow for transporting the transported object 103, and the transported object 103 approaches the counter plate 104. It is a technology to prevent the adsorption of the particles.

However, in the invention described in the cited document 3, since there is no significant pressure difference between the transport passage 105 and the air flow passage 106, a strong airflow flowing from the air flow passage 106 through the through hole 104a into the transport passage 105 cannot be expected. , It is not always possible to obtain an effective wall flow Fs. For this reason, the transported object 103 approaching the opposing wall 104 may stick to the opposing wall 104 without being blocked by the weak wall flow Fs (see FIG. 6C). In this way, when the transported object 103 sticks to the facing wall 104, the weak wall flow Fs generated on the upstream side flows so as to cover the transported object 103, and the transported object 103 is more strongly opposed to the opposing wall 104. A phenomenon occurs in which it is pressed against 104. In this case, since the wall flow Fs flowing so as to cover the transported object 103 is stronger than the pressure acting from the air flow path 106 side to the through hole 104a which is blocked by the transported object 103, the transported object 103 faces the opposite wall. It does not peel off from 104 and remains stuck. Therefore, even in the invention described in Patent Document 3, it is not possible to expect stable conveyance of paper sheets by the conveying flow.

Therefore, an object of the present invention is to provide a paper sheet transporting device that can expect stable transport of paper sheets by a transport flow.

In order to solve the above problems, a paper sheet transporting device for transporting a paper sheet from an upstream side to a downstream side in a transport pipe through which a transporting fluid flows from an upstream side to a downstream side, which conveys the paper sheet. the conveying pipe fluid passage space comprising a main transport path is formed inside a pair of main transport wall whose inner wall surface is disposed so as to face the main second surface of the paper sheet, main transport walls thereof facing An end cover body that is provided on at least one end side in two directions orthogonal to the transport direction of the paper sheets, and covers a part of the outer wall surface side of the pair of main transport walls from one end side of the main transport path. with the door, with said end cover disposed side in the main conveying wall the opposing, within the range covered by the said end cover, the carrying fluid is passed through the inner wall surface side from the outer wall surface side fluid fluid return hole that may be, respectively at required intervals to the transport direction, said end cover is to induce each said conveying fluid from the inner wall surface side of the main conveying wall the opposing to each outer wall surface and branch guide portion give rise to induction air portion, the fluid guide air portion through to the opposite of the transport fluid induced to the outer wall surface side of the main conveying wall inducible to the fluid return hole feedback induction air A pair of outer guiding portions , each end portion of which is in close contact with each outer wall surface of the main transport wall so as to generate a portion.

Further, in the above structure, on the outer wall surface side of the main transfer wall provided with the fluid return hole, a return guide for guiding the transfer fluid guided by the outer guide portion of the end cover body to the fluid return hole. It is characterized in that a section is provided.

Further, in the above configuration, the fluid return hole has a tapered shape in which an opening width becomes smaller from an upstream side to a downstream side.

Further, in the above-mentioned configuration, when the taper center line of the fluid return hole is extended to the downstream side, the fluid return is performed so as to have a required guide inclination angle toward the center side of the main transfer wall with respect to the flow-down direction of the transfer fluid. It is characterized by having a hole.

In addition, in the above configuration, the branch guide part of the end cover body projects outward from an intermediate portion between the pair of main transport walls and smoothly connects to one of the outer guide parts. A first branch guide part having a convex curved induction flow surface protruding outward from an intermediate portion between the pair of main transfer walls and smoothly connected to the other outer guide part. It is characterized by consisting of .

Further, in the above-mentioned configuration, curved end fluid guide portions that are close to each other are formed at the end portions on the end cover disposition side of the pair of main transfer walls.

According to the present invention, the pressure of the transport fluid supplied to the transport pipe is used to guide the transport fluid from the fluid guide cavity to the outer guide portion at high pressure and return it from the fluid return hole to the main transport path. It is possible to generate a return flow flowing toward the other main transfer wall while flowing in the transfer direction. That is, since the paper sheets conveyed in the main conveyance path are subjected to the pressure in the conveyance direction by the strong return flow from both side surfaces, the paper sheets are not in the state (habit, wrinkle, warp, strain, etc.). It is possible to stably convey paper sheets without being affected.

It is a schematic block diagram of the paper sheet conveying apparatus which concerns on embodiment of this invention. FIG. 3A is a schematic cross-sectional view obtained by dividing the transport pipe in a direction orthogonal to the transport direction. FIG. 2B is a cross-sectional view taken along the line IIB-IIB in FIG. (C) is an enlarged view of the fluid return hole and the return guide portion. 2D is a cross-sectional view taken along the line IID-IID in FIG. It is explanatory drawing of the generation principle of a return flow. (A1), (B1) is a schematic explanatory view of a return flow in a transfer pipe in which a taper center line of a fluid return hole is provided in parallel with the transfer direction. (A2), (B2) is a schematic explanatory view of the return flow in the transfer pipe provided so that the taper center line of the fluid return hole is inclined with respect to the transfer direction. (A) is a schematic longitudinal cross-sectional view of a carrier pipe of a first modified example. (B) is a schematic longitudinal cross-sectional view of a carrier pipe of a second modified example. (C) is a schematic longitudinal cross-sectional view of a carrier pipe of a third modified example. (A) is a basic structure explanatory view of the conveyance by the conventional conveyance pipe. (B), (C) is a schematic explanatory view of the prior art in which an opposing wall is provided inside the transfer tube.

Next, an embodiment of a paper sheet conveying apparatus according to the present invention will be described with reference to the accompanying drawings. Note that the paper sheets to be conveyed are papers having shape retention such as banknotes and documents (excluding tissue papers that do not have shape retention against the flow of conveyance), resin films. (Including plastic bills) and thin cards can be applied. In the paper sheet conveying apparatus of the present embodiment, a paper money conveying apparatus will be described as a paper money conveying object. Further, as the transfer fluid, not only gas but also liquid can be used, but in the banknote transfer device of the present embodiment, air is used as the transfer fluid.

The banknote transport device 1 shown in FIG. 1 can be used, for example, installed in a game store, to collect banknotes thrown into a game medium lending device, a card selling device, etc. and collect them in one place. The banknotes 3 to be conveyed by passing through the inside of the conveying pipe 2 are introduced into the conveying pipe 2 from the bill introducing section 4 provided at an appropriate place. A blower 5 is provided at one end of the transport pipe 2, and a bill collecting unit 6 is provided at the other end. That is, the air as the transport fluid flows in the transport pipe 2 from the upstream side where the blower 5 is provided to the downstream side where the bill collecting unit 6 is provided. It should be noted that by providing a suction device on the downstream banknote collecting unit 6 side, it is possible to allow the air as the transport fluid to flow from the upstream side to the downstream side in the transport pipe 2.

The transport pipe 2 can be connected to a required length and adjusted to a flow path according to the installation location and situation. The transport pipe 2 of the present embodiment includes a first main transport wall 211 and a second main transport wall 212, which are a pair of main transport walls whose inner surfaces are arranged so as to face two surfaces of a banknote, and the first and second main transport walls. The upper cover body 221 and the lower cover body 222 are provided at both upper and lower ends of the transport walls 211 and 212. The first and second main transfer walls 211 and 212 and the upper and lower cover bodies 221 and 222 form a fluid passage space 23 through which compressed air can be sent out. In the fluid passage space 23, a space sandwiched between the inner wall surface 211b of the first main transfer wall 211 and the inner wall surface 212b of the second main transfer wall 212 becomes a main transfer path 231, and passes through the main transfer path 231. The bill 3 is conveyed.

Further, the first and second main transfer walls 211 and 212 are provided with air return holes 24 through which air for transfer can pass from the outer wall surfaces 211a and 212a to the inner wall surfaces 211b and 212b at required intervals. In the present embodiment, the upper air return holes 24a are provided in a row above the first and second main transfer walls 211 and 212, and the upper air return holes 24a are provided in a row below the first and second main transfer walls 211 and 212. The holes 24b are different (see, for example, FIG. 2B). As will be described later, the upper air return hole 24a corresponds to the upper cover body 221, and the lower air return hole 24b corresponds to the lower cover body 222, but since the basic functions are the same, When there is no particular need to distinguish between them, they are simply referred to as air return holes 24.

The upper cover body 221 has a smooth convex convex first branch guide portion 221a1 that creates a first fluid guide void 232a between the upper cover body 221 and the upper edge of the first main transfer wall 211, and the upper end of the second main transfer wall 212. The second branch guide part 221b1 is provided between the edge and the second fluid guide space 232b. Further, the first outer guiding member 221a2 connected to the first branch guiding portion 221a1 of the upper cover body 221 has the carrying air guided to the outer wall surface 211a side of the first main carrying wall 211 through the first fluid guiding empty portion 232a. To generate a return guide empty portion 233a that can guide the air to the upper air return hole 24a. Similarly, the second outer guiding member 221b2 connected to the second branch guiding portion 221b1 of the upper cover body 221 is transported to the outer wall surface 212a side of the second main transport wall 212 via the second fluid guiding empty portion 232b. A return guide empty portion 233b capable of guiding air to the upper air return hole 24a is generated. The lower end of the first outer derivative 221a2 is a terminal bent portion 221a2-e that is smoothly curved to be in close contact with the outer wall surface 211a of the first main transfer wall 211, and is substantially coincident with the lower opening on the upstream side of the upper air return hole 24a. I will let you. Similarly, the lower end of the second outer conductor 221b2 is a smoothly curved end 221b2-e that comes into close contact with the outer wall surface 212a of the second main transfer wall 212, and is substantially the same as the upper opening of the upper air return hole 24a. Make sure they match.

The lower cover body 222 includes a smooth convex convex first branch guide portion 222a1 that creates a first fluid guide void 232a between the lower cover body 222 and the lower end edge of the first main transfer wall 211, and a lower end of the second main transfer wall 212. The second branch guiding part 222b1 is provided between the edge and the second fluid guiding empty space 232b. Further, the first outer conductor 222a2 connected to the first branch guide part 222a1 of the lower cover body 222 is a carrier air guided to the outer wall surface 211a side of the first main carrier wall 211 via the first fluid guide cavity 232a. To generate a return guide empty portion 233a that can guide the air to the lower air return hole 24b. Similarly, the second outer guiding member 222b2 connected to the second branch guiding portion 222b1 of the lower cover body 222 is guided to the outer wall surface 212a side of the second main carrying wall 212 via the second fluid guiding empty portion 232b. A return guide empty portion 233b capable of guiding air to the lower air return hole 24b is generated. In addition, the upper end of the first external conductor 222a2 is a terminal bent portion 222a2-e that is smoothly curved to be in close contact with the outer wall surface 211a of the first main transfer wall 211, and is substantially the same as the upstream opening of the lower air return hole 24b. Make sure they match. Similarly, the upper end of the second outer conductor 222b2 is smoothly curved to form a terminal end bent portion 222b2-e that comes into close contact with the outer wall surface 212a of the second main transfer wall 212, and the upper opening of the lower air return hole 24b. Keep them almost the same.

The first and second outer guiding portions 221a2 and 221b2 of the upper and lower cover bodies 221 and 222 are provided on the outer wall surfaces 211a and 212a of the first and second main transfer walls 211 and 212 provided with the air return holes 24, respectively. A return guide portion 25 is provided to guide the transport air guided to the air return hole 24. The return guide portion 25 is a semi-cup-shaped projecting body in which the air introduction opening 25a is located at least on the upstream side of the air return hole 24 and narrows toward the downstream side of the air return hole 24 (FIG. 2(C), ( See D)). For example, the sheet metal is not punched in the step of opening the air return hole 24 in the first and second main transfer walls 211 and 212, and the metal wall is pressed to project along the edge of the air return hole 24 toward the outer wall surfaces 211a and 212a. The return guide portion 25 can be easily formed by molding a semi-cup shaped protrusion. Of course, the return guide part 25 may be formed by attaching a semi-cup-shaped structure formed as a separate body along the edge of the air return hole 24.

On the other hand, the opening shape of the air return hole 24 is tapered so that the opening width decreases from the upstream side to the downstream side. Specifically, the upper taper edge 241 and the lower taper edge 242 symmetrically positioned with the taper center line Tc interposed therebetween, the rear edge 243 connected to the upstream side ends of the upper and lower taper edges 241, 242, and the upper and lower taper edge 241. , 242 has an opening shape surrounded by a front edge 244 that is continuous with the downstream end of each of the first and second sides. The return guide portion 25 bulges from the upper and lower tapered edges 241 and 242 and the front edge 244 toward the outer wall surfaces 211a and 212a of the first and second main transfer walls 211 and 212, and the rear edge of the air return hole 24. This is a structure in which air is introduced only from the air introduction opening 25a connected to 243. Therefore, the air flow introduced from the air introduction opening 25a of the return guide part 25 returns from the air return hole 24 to the main transport path 231 along the return guide part in which the amount of swelling decreases from upstream to downstream. Becomes Moreover, since the air return hole 24 has a tapered shape that narrows from the upstream side to the downstream side, a part of the air flow passing through the air return hole 24 is compressed and becomes a strong flow.

Further, when the taper center line Tc is extended to the downstream side, the air return hole 24 has a required guiding inclination toward the center side of the first and second main transfer walls 211 and 212 with respect to the air blowing direction WD of the transfer air. It is arranged so as to form an angle α. That is, the upper air return hole 24a is arranged so that the taper center line Tc faces downward, and the lower air return hole 24b is arranged so that the taper center line Tc faces upward (for example, as shown in FIG. 2). (See (B)).

In the banknote transport device 1 of this embodiment configured as described above, the banknotes 3 can be stably transported in the transport tube 2. The basic principle will be described with reference to FIG. FIG. 3A shows a cross section of the transfer pipe 2 on the side of the upper cover body 221 (a cross section orthogonal to the blowing direction of the transfer air), and FIG. 3B shows the main transfer path 231 in the transfer pipe 2 from the main transfer path 231. It is sectional drawing which looked at the 1st main conveyance wall 211 side.

As described above, in the transport pipe 2 into which the pressurized transport air is fed, pressure is generated that pushes the upper, lower, left, and right wall surfaces outward. Since the first fluid guide cavity 232a and the second fluid guide cavity 323b are formed between the upper edge portions of the first and second main transport walls 211 and 212 and the upper cover body 221, they are used for transportation. The air spreads upward and to the left and right. At this time, since the upper cover body 221 is provided with the first branch guiding portion 221a1 and the second branch guiding portion 221b1 on both left and right sides of the intermediate portion between the first main transport wall 211 and the second main transport wall 212, The airflow splits evenly.

Moreover, since the inner surfaces of the first and second branch guiding portions 221a1, 221b1 are outwardly protruding and smoothly serve as convex-shaped attracting flow surfaces that are continuously connected to the first and second outer guiding portions 221a2, 221b2, the Coanda effect causes The airflow guided to the first and second return guiding air portions 322a and 233b becomes remarkable. The Coanda effect is a property in which a viscous fluid flows along adjacent wall surfaces, and since the transport air is also a viscous fluid, it makes sense to flow along the inner surface of the upper cover body 221. There is.

Therefore, as shown in FIG. 3(B), a part of the transfer air that has been pressure-fed into the transfer tube 2 is transferred from the main transfer path 231 to the first fluid guide space 232a and further to the first return guide space. It is guided to 233a and goes around to the outer wall surface 211a side of the first main transfer wall 211. Since this air flow continues without interruption, the transport air that has spilled to the outer wall surface 211a side of the first main transport wall 211 is not decompressed to an extremely low level, and moves downward in the first return guide void portion 233a to the downstream side. Be induced. Since the lower portion of the first return guiding void portion 233a is the terminal end bent portion 221a2-e, the airflow that reaches the lower portion of the first return guiding void portion 233a flows further downstream along the terminal end bent portion 221a2-e. Then, the airflow flowing along the terminal end bent portion 221a2-e reaches the return guide portion 25 of the upper air return hole 24a provided at an appropriate interval, and thus is introduced from the air introduction opening 25a and the upper air return hole 24a. Is returned to the inner wall surface 211b side of the first main transfer wall 211 via. Thus, the return flow RF having a strong flow pressure is generated in the main transfer path 231 from the upper air return hole 24a of the first main transfer wall 211. Similarly, a strong fluid pressure is applied from the lower air return hole 24b of the first main transfer wall 211, the upper air return hole 24a of the second main transfer wall 212, and the lower air return hole 24b of the second main transfer wall 212. The return flow RF of is generated in the main transport path 231.

That is, the return flow RF ejected from the air return hole 24 is kept at an appropriate flow pressure by utilizing the pressure applied in the up-down direction in the transfer pipe 2, and therefore flows in the transfer direction while the other main transfer wall side is being flowed. It becomes a strong flow toward. For example, the return flow RF from the upper air return hole 24a provided in the first main transfer wall 211 flows toward the second main transfer wall 212 side while flowing along the air blowing direction WD of the transfer air. Similarly, the return flow RF from the upper air return hole 24a provided in the second main transfer wall 212 flows toward the first main transfer wall 211 side while flowing along the air blowing direction WD of the transfer air. .. When the bill 3 in the main transport path 231 receives the return flow RF from both sides of the first and second main transport walls 211 and 212 at the same time, Since the pressures toward the second main transport walls 211 and 212 are canceled out, only the pressure to direct the bills in the transport direction is applied to the banknotes 3 and the force for sending the bills in the transport direction increases. Therefore, in the banknote transporting device 1 of the present embodiment, by providing the transport tube 2 with the function of generating the return flow RF, the banknotes 3 flowing in the transport tube 2 are pressed in the transport direction by the strong return flow RF. Thus, the paper money 3 can be stably conveyed without being affected by the state of the bill 3 (habit, wrinkle, twist, strain, etc.).

The position where the air return hole 24 is provided is not particularly limited, but the pressure applied to the inner wall surfaces 211b and 212b of the first and second main transfer walls 211 and 212 in the transfer pipe 2 is in the vertical direction. Since it is strongest near the center, it is desirable to avoid this center position. For example, the upper air return hole 24a is located at an intermediate position between the center and the upper end of the first and second main transfer walls 211 and 212, and the upper air return hole 24a is located at an intermediate position between the center and the lower end of the first and second main transfer walls 211 and 212. By providing the side air return hole 24b, the return flow RF can be effectively applied to the bill 3.

Further, the opening shape of the air return hole 24 is not limited to the trapezoidal shape, and may be a teardrop shape or the like which is narrowed down from the upstream side to the downstream side. Further, even if the direction of the taper center line Tc of the air return hole 24 is made parallel to the air blowing direction WD of the transfer air, the function of the return flow RF is not significantly impaired, but the wind speed in the main transfer path 231 and the return It is desirable to incline by a guide inclination angle α that is determined by taking into consideration the air volume, air pressure, etc. of the flow RF. For example, when the direction of the taper center line Tc of the upper air return hole 24a' is set parallel to the air blowing direction WD of the carrying air as in the carrying pipe 2'shown in FIGS. 4A1 and 4B1, the main carrying is performed. A phenomenon occurs in which the efficiency of the return flow RF' is reduced due to the influence of the upward pressure in the passage 231. On the other hand, like the conveying pipe 2 shown in FIGS. 4(A2) and 4(B2), the taper center line Tc of the upper air return hole 24a to which the upward pressure is applied in the main conveying path 231 is equal to the guide inclination angle α. If it is tilted downward, pressure can be efficiently applied from the return flow RF to both side surfaces of the bill 3 that is the transported object. Similarly, if the taper center line Tc of the lower air return hole 24b to which a downward pressure is applied in the main transport path 231 is tilted upward by the guide inclination angle α, both sides of the bill 3 that is the object to be transported are returned from the return flow RF. Can efficiently apply pressure to the surface.

The above-mentioned carrier pipe 2 is provided with the upper cover body 221 and the lower cover body 222 to generate the return flow RF on both upper and lower sides, but the configuration is not limited to this. For example, in the transport pipe 2A of the first modified example shown in FIG. 5A, only the upper cover body 221 is provided, and the lower ends of the first main transport wall 211 and the second main transport wall 212 are connected to the bottom wall 213. However, the structure is such that the return flow RF does not occur on the lower side. Even with the structure in which the return flow RF is generated only on the upper side as described above, it is possible to exhibit the function of preventing the bills 3 being conveyed from sticking to the inner wall surfaces 211b and 212b of the first and second main conveying walls 211 and 212. On the contrary, even if the upper cover body 221 is abolished and only the lower cover body 222 is left and the return flow RF is generated only on the lower side, the bills 3 being conveyed are similarly fed to the first and second main conveyance walls. A function of preventing sticking to the inner wall surfaces 211b and 212b of the 211 and 212 can be exhibited. However, when there is no return flow RF on the upper side or the lower side, the lower side or the upper side of the bill 3 fluctuates left and right and contacts the inner wall surfaces 211b and 212b of the first and second main conveying walls 211 and 212, so that the conveyance is performed. Efficiency may be reduced. In that sense, it is desirable that the function of generating the return flow RF is provided both above and below.

Further, the carrier pipe 2B of the second modified example shown in FIG. 5(B) is provided with an upper cover body 223 having a gentle upper surface and a lower cover body 224 having a gentle lower surface, and these have a convex curved attracting flow surface. There is no structure. However, also in the transport pipe 2B, the first and second fluid guiding cavities 232a and 232b are generated between the upper and lower cover bodies 223 and 223 and the upper and lower edges of the first and second main transport walls 211 and 212. Therefore, it is possible to guide the airflow to the first and second feedback guiding voids 233a and 233b. Therefore, a return flow can be generated also in the transport tube 2B, and stable transport of the banknote 3 can be realized.

Further, the carrier pipe 2C of the third modified example shown in FIG. 5C includes a semi-circular upper cover body 225 and a semi-circular lower cover body 226. In addition, curved upper first fluid guide portions 231t and upper second fluid guide portions 214t that are close to each other are formed at the upper ends of the first and second main transfer walls 213 and 214. Similarly, curved lower first fluid guide portions 231u and lower second fluid guide portions 214u that are adjacent to each other are formed at the lower ends of the first and second main transfer walls 213 and 214. Since the upper first fluid guide portion 231t and the upper second fluid guide portion 214t are close to each other, the opening that can reach the upper cover body 225 is narrowed, so that the airflow that reaches the first and second fluid guide empty portions 232a and 232b. Is increased, and high-pressure air can be supplied to the first and second feedback guiding air portions 233a and 233b. Further, by making the curved shapes of the upper first fluid guide portion 231t and the upper second fluid guide portion 214t correspond to the inner surface shape of the upper cover body 225, the first and second return guide void portions 233a, 233b are substantially constant. The space has a width so that the airflow can be supplied to the return guide portion 25 and the air return hole 24 with a stable wind pressure. Therefore, the return flow is generated also in the transport pipe 2C, and the stable transport of the bill 3 can be realized.

Although the paper sheet conveying apparatus according to the present invention has been described above based on the embodiment, the present invention is not limited to this embodiment and can be realized unless the configuration described in the claims is changed. It covers all of the above-mentioned paper sheet transporting devices as a scope of right.

1 Banknote Transport Device 2 Transport Pipe 211 First Main Transport Wall 212 Second Main Transport Wall 221 Upper Cover Body 221a1 First Branch Guidance Section 221a2 First Outer Guiding Section 222 Lower Cover Body 222a1 Second Branch Guidance Section 222a2 Second Outside Direction guiding part 23 fluid passage space 231 main transport path 232a first fluid guiding empty part 233a first return guiding empty part 232b second fluid guiding empty part 233b second returning guiding empty part 24 air return hole 3 banknote

Claims (6)

A paper sheet conveying device for conveying paper sheets from upstream to downstream in a conveying pipe in which a conveying fluid flows from upstream to downstream,
The conveying pipe fluid passage space comprising a main conveying path for conveying the paper sheet is formed internally, and the paper sheet main dihedral disposed inner wall surface so as to face the a pair of main transport wall A pair of main transport walls, which are provided on at least one end side in two directions orthogonal to the transport direction of the paper sheets in the main transport walls facing each other, and which are located from one end side of the main transport path to the outer wall surface side of the pair of main transport walls. With an end cover body that covers the part ,
In the end cover member disposed side in the main conveying wall the opposing, within the range covered by the said end cover, the fluid feedback may the transported fluid is passed through each of the inner wall surface side from the outer wall surface side Holes are provided at required intervals in the carrying direction ,
The end cover body includes a branch guide portion for generating a fluid guide cavity for guiding the transport fluid from each inner wall surface side of the opposing main transport wall to each outer wall surface side, and the fluid guide cavity portion. through it to give rise to the feedback-induced air unit capable of inducing conveying fluid to said fluid return hole induced into the outer wall surface side of the main conveying wall the opposing, the respective end portions of the main carrier wall A paper sheet transporting device comprising: a pair of outer guiding portions that are in close contact with the outer wall surface . On the outer wall surface side of the main transfer wall provided with the fluid return hole, a return guide part for guiding the transfer fluid guided by the outer guide part of the end cover body to the fluid return hole is provided. The sheet conveying apparatus according to claim 1, wherein the sheet conveying apparatus is a sheet conveying apparatus. The sheet conveying device according to claim 1 or 2, wherein the fluid return hole has a tapered shape in which an opening width decreases from the upstream side to the downstream side. When the taper center line of the fluid return hole is extended to the downstream side, the fluid return hole is provided so as to have a required guide inclination angle toward the center side of the main transfer wall with respect to the flow-down direction of the transfer fluid. The paper sheet conveying apparatus according to claim 3, which is characterized in that. Branch guide portion of said end cover body, a first branch guide comprising a pair of convex curved attractant flow surface continuing to the outer induction of smooth one projects outwardly from the intermediate portion of the main conveying walls Part, and a second branch guide part having an attracting flow surface of a convex curved surface protruding outward from an intermediate part between the pair of main transfer walls and smoothly connected to the other outer guide part. The paper sheet conveying apparatus according to any one of claims 1 to 4. The curved fluid guide portions that are close to each other are formed at the end portions of the pair of main transport walls on the end cover disposition side. Paper conveying device.

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