JP2021024698A - Paper sheet conveyance device - Google Patents

Abstract

To provide a paper sheet conveyance device which enables stable conveyance of paper sheets by conveyance flow.SOLUTION: In a conveyance pipe 2, a fluid passing space 23 in which bank bills 3 are conveyed is formed by closing a vertical opening between first and second main conveyance walls 211, 212 with upper and lower cover bodies 221, 222. The conveyance pipe 2 guides part of pumped conveyance air from first and second fluid guide empty parts 232a, 232b to first and second return guide empty parts 233a, 233b to generate return flow returning from air return holes 24 to a main conveyance passage 231. Inner wall surfaces 211b, 212b of the first and second main conveyance walls 211, 212 are provided with center side section ribs 26 to prevent the bank bills 3 from adhering to the inner wall surfaces 211b, 212b to get stack.SELECTED DRAWING: Figure 1

Description

The present invention relates to a paper leaf transport device that transports paper sheets from upstream to downstream in a transport pipe through which a transport fluid flows from upstream to downstream.

Conventionally, when transporting paper leaves such as thin plastic or paper cards and banknotes, a paper leaf transport device that uses a belt or roller to sandwich and send the paper leaves has been known and has become widespread in the market. ing. For example, in a game hall where a game machine such as a pachinko machine or a slot machine is installed, a game medium lending device or the like is provided adjacent to the game machine, and the banknotes are not stocked in the game medium lending device. When transporting to a banknote safe or the like for management, a paper leaf transport device is used. The paper leaf transport device in the game hall takes in the bills identified by the bill identification unit such as the game media lending device, and is attached to the island edge of the game island where the game machine is installed by a transport mechanism consisting of belts and rollers. It is transported to the banknote safe.

In such a paper leaf transport device, since the banknotes are transported by using a mechanism for sandwiching the banknotes with a belt or a roller, there is a problem that the banknotes are often jammed at the connecting portion of the belt or the roller. In order to clear the banknote jam, it is necessary to have the player who is playing with the game machine interrupt the game, identify the defective part in the game island, and remove the jammed banknote, which causes inconvenience to the customers. At the same time, the burden on the game clerk was not small.

In recent years, a paper leaf transport device has been proposed in which an air flow for transport is generated in a transport pipe and the banknotes are transported on the air flow. When transporting banknotes by air flow, there is no risk of banknotes being clogged at the mechanism because no mechanism such as a belt or roller is used. As a paper leaf transport device for air transport, a device has been proposed in which the rear end portion of a banknote is deformed and the wind pressure of the air stream for transport is applied to the deformed portion to smooth the transport of the bill (for example). , Patent Document 1). Further, by arranging a lightweight transport auxiliary body behind the banknote and sending the transport auxiliary body in the transport direction by an air flow, the transport auxiliary body pushes the bill from the rear in the transport direction and indirectly transports the bill. A realized paper leaf transport device has also been proposed (see, for example, Patent Document 2).

Further, when paper sheets are directly transported by an air flow, there is a problem that the air flow cannot be received in the transport direction and the banknotes are adsorbed on the inner wall surface of the transport pipe and cannot be transported. The basic principle of such adsorption of paper leaves will be described with reference to FIG. 10 (A). The transport pipe 102 that functions as a paper leaf transport path is a flow path surrounded by four side walls (left side wall 1021, right side wall 1022, upper wall 1023, lower wall 1024), and the direction of ventilation from the upstream side to the downstream side. The WD transport flow continues to flow.

When the transport flow flows through the transport pipe 102, pressure is generated in the direction orthogonal to the blast 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 Pb acts on the inner wall surface of the lower wall 1024. , The force increases in proportion to the square of the speed of the transport flow. Due to its thinness, paper sheets are less likely to receive a carrier flow from the trailing edge, and the upper and lower edges are almost never subjected to the forces of pressures Pt and Pb in the vertical direction. However, the two surfaces of the paper leaves 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, due to the pressures Pl and Pr, a phenomenon occurs in which the paper leaves stick to the inner wall surfaces of the left and right side walls 1021 and 1022. If the transport flow flowing along both sides of the thin paper leaves is balanced, the paper leaves will not be attracted to the left and right side walls 1021 and 1022, but if there is a slight difference in the transport flow, the paper There is a difference in the pressure applied to the side surface of the leaves, and they are attracted to the weak pressure side and come into contact with the inner wall surface. Since the frictional force between the left and right side walls 1021 and 1022 exceeds the force of the transport flow, the paper leaves that come into contact with each other stagnant while being adsorbed on the inner wall surface and are not transported downstream.

In order to prevent bills from being adsorbed on the inner wall surface due to the cause derived from such a transport pipe structure, a paper leaf transport device devised to prevent bills from being adsorbed on the wall surface by creating a wall flow along the wall surface. Has also been proposed (see, for example, 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 habit, wrinkles, wrinkles, firmness, etc. of the banknote to be transported are different for each banknote, the deformed shape to be maintained during transportation is constant. However, it was a cause of clogging in the transport pipe. Further, since it is necessary to stretch the banknotes deformed for transportation after the banknotes are transported, there is a problem that the deterioration of the banknotes is accelerated by repeating the deformation and stretching of the banknotes.

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

As described above, the inventions described in Patent Document 1 and Patent Document 2 have a big problem that stable transport of paper sheets by the transport flow cannot be expected. With respect to these inventions, the invention described in Patent Document 3 is disclosed as being able to stably transport banknotes by generating a wall flow along the wall surface to prevent the banknotes from sticking to the side wall and staying there. ing. The schematic structure of the invention described in Patent Document 3 will be described with reference to FIG. 10 (B). A pair of facing plates 104 and 104 are provided in a transport pipe 102 for transporting an object to be transported 103 of paper sheets, a transport path 105 is formed between the facing plate 104 and the facing plate 104, and each facing plate 104 and a pipe. Air flow paths 106, 106 are formed between the wall and the air flow path 106. Through holes 104a, which are wall flow generating portions, are arranged in a houndstooth pattern on the facing plate 104, and wall flow Fs is generated in which the airflow flowing from the air flow path 106 into the transport path 105 flows along the wall surface. So to speak, wall currents Fs are generated on both sides of the transport flow Fm (both side surfaces of the transported object 103), which is the main airflow for transporting the transported object 103, and the transported object 103 approaches the facing plate 104. It is a technology to prevent it from being adsorbed.

However, in the invention described in Cited Document 3, since there is no significant pressure difference between the transport path 105 and the air flow path 106, a strong air flow that flows from the air flow path 106 through the through hole 104a and into the transport path 105 cannot be expected. , It is not always possible to obtain effective wall flow Fs. Therefore, the object to be transported 103 approaching the facing wall 104 may stick to the facing wall 104 without being blocked by the weak wall flow Fs (see FIG. 10C). When the object to be transported 103 sticks to the facing wall 104 in this way, the weak wall flow Fs generated on the upstream side thereof flows so as to cover the object to be transported 103, and the object to be transported 103 is made stronger against the facing wall. A phenomenon of pressing against 104 occurs. In this case, the wall flow Fs flowing so as to cover the transported object 103 is stronger than the pressure acting on the through hole 104a blocked by the transported object 103 from the air flow path 106 side, so that the transported object 103 is opposed to the wall. It does not peel off from 104 and remains stuck. Therefore, even in the invention described in Patent Document 3, stable transport of paper sheets by the transport flow cannot be expected.

Therefore, an object of the present invention is to provide a paper leaf transport device that enables stable transport of paper leaves by a transport flow.

In order to solve the above problem, a paper leaf transport device for transporting paper leaves from upstream to downstream through a transport pipe in which a transport fluid flows from upstream to downstream, and transports the paper leaves. The transport pipe in which a fluid passage space including a main transport path is formed is a pair of main transport wall portions whose inner wall surface sides are arranged so as to face the two main surfaces of the paper sheets, and these facing main transports. An end cover provided on at least one end side in two directions orthogonal to the transport direction of the paper leaf in the wall portion is provided, and each outer wall surface is provided on the end cover arrangement side in the facing main transport wall portion. Fluid return holes through which the transport fluid can pass are provided from the side to each inner wall surface side at required intervals in the transport direction, and the end cover is provided from each inner wall surface side of the facing main transport wall portion. The branch guide portion that generates a fluid-guided empty portion that guides the transport fluid to the outer wall surface side, and the transport that is guided to each outer wall surface side of the opposite main transport wall portion via the fluid guide empty portion. It is provided with a pair of outer guiding portions that generate a return guiding empty portion capable of guiding the fluid to the fluid return hole, and the paper sheets are formed on the inner wall surface side of the main transport wall portion. The structure is provided with a convex contact preventing means for preventing contact with the inner wall surface of the portion.

Further, in the above configuration, the close contact preventing means avoids an opening section including between the upstream side edge portion and the downstream side edge portion of the fluid return hole, and prevents close contact between two adjacent opening sections. It may be a section rib provided only within the section.

Further, in the above configuration, the section rib may be provided at least in the close contact prevention section at a position connected to the opposite side edge portion of the fluid return hole on the end cover arrangement side in the transport direction.

Further, in the above configuration, the contact blocking means passes from the contact blocking region between the two adjacent fluid return holes to the upstream side edge of the fluid return hole located on the upstream side of the contact blocking region. It may be a through rib provided in the above.

Further, in the above configuration, the range in which the contact blocking region between the two adjacent fluid return holes and the fluid return hole located on the upstream side of the contact prevention region are continuous is set as a reference continuous range, and the through. The ribs may be provided through one or more of the reference continuous ranges.

Further, in the above configuration, the fluid return hole has an opening shape symmetrical with respect to a center line parallel to the transport direction in a direction orthogonal to the transport direction, and the through rib is the center of the fluid return hole. It may be provided at a position including a line.

According to the present invention, by providing the contact preventing means on the inner wall surface of the main transport wall portion, it is possible to prevent the paper sheets being transported in the main transport path from adhering to the inner wall surface of the main transport wall portion. Enables stable transport of paper leaves by transport flow.

It is a schematic block diagram of the paper leaf transfer apparatus which concerns on embodiment of this invention. (A) is a schematic vertical sectional view of a transport pipe divided in a vertical direction orthogonal to the transport direction. (B) is a cross-sectional view taken along the line IIB-IIB in FIG. 2 (A). (C) is a cross-sectional view taken along the line IIC-IIC in FIG. 2 (A). (A) is a schematic cross-sectional view of a transport pipe not provided with a close contact preventing means divided in a direction orthogonal to the transport direction. (B) is a cross-sectional view taken along the line IIIB-IIIB in FIG. 3 (A). (C) is a cross-sectional view taken along the line IIIC-IIIC in FIG. 3 (A). It is the schematic explanatory drawing of the return flow in the transport pipe which does not provide a close contact prevention means. (A) is a schematic explanatory view of a transport pipe showing the ideal return flow behavior in the main transport path. (B) is a schematic explanatory view of a transport pipe showing the behavior of a weak feedback flow in the main transport path. (C) is a schematic explanatory view of a transport pipe showing the behavior of a strong return flow in the main transport path. (A) is a surface view of a habit tag with creases in which the short side direction is asymmetric. (B) is an end view of the habit tag of FIG. 6 (A) as viewed from the upstream side. 5 (C) is an operation explanatory view when the habit tag of FIG. 6 arranged at the center of the transport pipe in FIG. 5 (C) receives a feedback flow, (A) is a state before the feedback flow action, and (B) is a state after the feedback flow action. Indicates the state of. (A) is a schematic vertical cross-sectional view of the transport pipe of the second configuration example divided in the vertical direction orthogonal to the transport direction. (B) is a cross-sectional view taken along the line VIIIB-VIIIB in FIG. 8A. (C) is a cross-sectional view taken along the line VIIIC-VIIIC in FIG. 9A. (A) is a schematic vertical cross-sectional view of the transport pipe of the third configuration example divided in the vertical direction orthogonal to the transport direction. (B) is a cross-sectional view taken along the line IXB-IXB in FIG. 9 (A). (C) is a cross-sectional view taken along the line IXC-IXC in FIG. 9 (A). (A) is an explanatory view of the basic structure of transport by a transport pipe having a conventional structure. (B) and (C) are schematic explanatory views of fluid transport in a conventional transport pipe provided with a facing wall inside.

Next, an embodiment of the paper leaf transport device according to the present invention will be described with reference to the accompanying drawings. The paper leaves to be transported are papers with shape-retaining properties such as banknotes and documents (excluding those that do not have shape-retaining properties with respect to the transport flow, such as tissue paper), and resin films. (Including plastic banknotes) and thin cards can be applied. In the paper leaf transport device of the present embodiment, a bill transport device for transporting paper bills will be described. Further, as the transport fluid, not only gas but also liquid can be used, but in the banknote transport device of the present embodiment, air is used as the transport fluid. Further, in the present embodiment, since the banknotes are transported in a state of standing upright in the direction of gravity, for convenience, the directions in which the two sides of the banknotes face are referred to as left and right or sideways, and the direction of gravity orthogonal to the left and right or sideways.

The banknote transfer device 1 shown in FIG. 1 can be installed in, for example, a game store, and can be used to collect banknotes inserted into a game medium lending device, a card sales device, or the like and collect them in one place. The banknotes 3 to be transported, which are passed through the transport pipe 2 and transported, are introduced into the transport pipe 2 from the bill introduction unit 4 provided at an appropriate position. 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, air as a transport fluid flows in the transport pipe 2 from the upstream where the blower 5 is provided to the downstream where the bill collection unit 6 is provided. By providing a suction machine on the banknote collection unit 6 side, which is downstream, air as a transport fluid can be allowed to flow in the transport pipe 2 from upstream to downstream.

The transport pipe 2 shown in detail in FIG. 2 can be connected to a required length and adjusted to a flow path according to the installation location and the situation. The transport pipe 2 includes a first main transport wall 211 and a second main transport wall 212, and first and second main transport walls 211, which are a pair of main transport wall portions whose inner surfaces are arranged so as to face two surfaces of banknotes. , 212 has an upper cover body 221 and a lower cover body 222 as end covers provided at both upper and lower ends, respectively. The first and second main transport walls 211 and 212 and the upper and lower cover bodies 221,222 form a fluid passage space 23 inside which compressed air can be sent out. Of the fluid passage space 23, the space sandwiched between the inner wall surface 211b of the first main transport wall 211 and the inner wall surface 212b of the second main transport wall 212 becomes the main transport path 231 and passes through the main transport path 231. The bill 3 is transported. The first and second main transport walls 211 and 122 and the upper and lower cover bodies 221,222 may be formed as individual parts and assembled, or may be assembled by resin processing technology such as injection molding or extrusion molding. May be formed and assembled. Further, not limited to resin processing, a plate material having a thickness of about 1 to 2 [mm] may be processed to form the first and second main transport walls 211 and 212 and the upper and lower cover bodies 221,222.

Further, the first and second main transport walls 211 and 212 are provided with air return holes 24 through which transport air can pass from the outer wall surfaces 211a and 212a to the inner wall surfaces 211b and 212b at required intervals. In the transport pipe 2 having this configuration, the upper portions of the first and second main transport walls 211 and 122 corresponding to the upper cover body 221 and the first and second main transport walls 211 corresponding to the lower cover body 222, The lower part of the 212 was provided in a line at equal intervals (see, for example, FIG. 2B).

Each air return hole 24 has a substantially quadrangular shape surrounded by an upstream opening edge 241, a downstream opening edge 242, an end side opening edge 243, and a central opening edge 244. The upstream side opening edge 241 is an upstream side edge portion of the air return hole 24 and is substantially orthogonal to the transport direction. The downstream opening edge 242 is a downstream edge portion of the air return hole 24 and is substantially parallel to the upstream opening edge 241. The end side opening edge 243 is an arrangement side edge portion of the upper cover body 221 or the lower cover body 222 of the air return hole 24, and is substantially parallel to the transport direction. The central opening edge 244 is the central side edge of the air return hole 24 (opposite the upper and lower cover bodies 221,222 on the arrangement side, and close to the center in the vertical direction of the first and second main transport walls 211 and 212. At the edge), it is substantially parallel to the end side opening edge 243. Therefore, all the air return holes 24 have an opening shape that is symmetrical in the vertical direction (direction orthogonal to the transport direction) with respect to the center line CL (indicated by a single point chain line in FIG. 1) parallel to the transport direction.

The air return hole 24 in the transport pipe 2 of this configuration example has a substantially quadrangular shape, but the opening shape, opening area, arrangement interval, etc. are not particularly limited, and as will be described later, it is necessary and sufficient. It is only necessary to obtain a return flow. When transporting Japanese banknotes 3, assuming that the heights of the first and second main transport walls 211 and 212 are about 80 [mm] and the facing distance is about 10 to 15 [mm], they are arranged in two places above and below. The vertical height of each air return hole 24 to be provided is appropriately 20 to 30 [mm]. The width of the air return hole 24 in the transport direction may be set so that an appropriate air volume and speed can be obtained according to the arrangement interval of the air return hole 24.

Further, all the air return holes 24 provided in the first main transport wall 211 and all the air return holes 24 provided in the second main transport wall 212 face each other with the main transport path 231 in between. It is desirable to set the opening position of the hole 24. However, even if the air return hole 24 on the first main transport wall 211 side and the air return hole 24 on the second main transport wall 212 side are slightly deviated in the transport direction or the vertical direction of the bill 3, the return flow is extremely biased. If does not act on the two sides of the bill 3 from both sides, stable transportation of the bill 3 can be realized.

The upper cover body 221 is a branch guide that creates a fluid-guided empty space that guides transport air from the inner wall surfaces 211b and 212b of the first and second main transport walls 211 and 212 to the outer wall surfaces 211a and 212a, respectively. It has a part. In the upper cover body 221 of this configuration, the first branch guide portion 221a1 for guiding the transport air from the inner wall surface 211b side of the first main transport wall 211 to the outer wall surface 211a side, and the second main transport wall 212. A second branch guide portion 221b1 for guiding air from the inner wall surface 212b side to the outer wall surface 212a side is provided. That is, the upper cover body 221 having this configuration has a smooth concave curved first branch guiding portion 221a1 that creates a first fluid guiding empty portion 232a in the space above the upper end edge of the first main transport wall 211, and a second. A second branch guiding portion 221b1 that creates a second fluid guiding empty portion 232b is provided in the space above the upper end edge of the main transport wall 212. When the bill 3 is to be transported, the left and right widths of the first and second branch guide portions 221a1,221b1 are each about 15 [mm], and the distance to the innermost part of the concave curved surface is about 5 [mm].

The first outer guiding portion 221a2 connected to the first branch guiding portion 221a1 of the upper cover body 221 is guided to the outer wall surface 211a side of the first main transport wall 211 via the first fluid guiding empty portion 232a. Generates a first return induction empty portion 233a capable of guiding the air to the air return hole 24. Similarly, the second outer guiding portion 221b2 connected to the second branch guiding portion 221b1 of the upper cover body 221 was guided to the outer wall surface 212a side of the second main transport wall 212 via the second fluid guiding empty portion 232b. A second return induction empty portion 233b capable of guiding the transport air to the air return hole 24 is generated. The lower end of the first outer guide portion 221a2 is smoothly curved to form a terminal bent portion 221a2-e that is in close contact with the outer wall surface 211a of the first main transport wall 211, and is located slightly below the air return hole 24. 1 The return guidance empty space 233a is closed. Similarly, the lower end of the second outer guide portion 221b2 is smoothly curved to form a terminal bent portion 221b2-e that is in close contact with the outer wall surface 212a of the second main transport wall 212, at a position slightly below the air return hole 24. The second return guidance empty space 233b is closed. When the bill 3 is to be transported, the vertical height of the first and second outer guide portions 221a2 and 221b2 is about 30 to 35 [mm].

Similar to the upper cover body 221 of the lower cover body 222, a fluid induction empty portion that guides air from the inner wall surfaces 211b and 212b sides of the first and second main transport walls 211 and 212 to the outer wall surfaces 211a and 212a, respectively. It is provided with a branch guide unit that causes In the lower cover body 222 of this configuration, the first branch guide portion 222a1 for guiding air from the inner wall surface 211b side of the first main transport wall 211 to the outer wall surface 211a side, and the inner wall surface of the second main transport wall 212. A second branch guide portion 222b1 for guiding air from the 212b side to the outer wall surface 212a side is provided. That is, the lower cover body 222 of this configuration has a smooth concave curved first branch guiding portion 222a1 that creates a first fluid guiding empty portion 232a in the space below the lower end edge of the first main transport wall 211, and a second. A second branch guiding portion 222b1 that creates a second fluid guiding empty portion 232b is provided in the space below the lower end edge of the main transport wall 212. When the bill 3 is to be transported, the left and right widths of the first and second branch guide portions 222a1, 222b1 are about 15 [mm], and the distance to the innermost part of the concave curved surface is about 5 [mm].

The first outer guiding portion 222a2 connected to the first branch guiding portion 222a1 of the lower cover body 222 is guided to the outer wall surface 211a side of the first main transport wall 211 via the first fluid guiding empty portion 232a. Generates a first return induction empty portion 233a capable of guiding the air to the air return hole 24. Similarly, the second outer guiding portion 222b2 connected to the second branch guiding portion 222b1 of the lower cover body 222 was guided to the outer wall surface 212a side of the second main transport wall 212 via the second fluid guiding empty portion 232b. A second return induction empty portion 233b capable of guiding the transport air to the air return hole 24 is generated. The upper end of the first outer guide portion 222a2 is smoothly curved to form a terminal bent portion 222a2-e that is in close contact with the outer wall surface 211a of the first main transport wall 211, and is located slightly above the air return hole 24. 1 The return guidance empty space 233a is closed. Similarly, the upper end of the second outer guide portion 222b2 is smoothly curved to form a terminal bent portion 222b2-e that is in close contact with the outer wall surface 212a of the second main transport wall 212, at a position slightly above the air return hole 24. The second return guidance empty space 233b is closed. When the bill 3 is to be transported, the vertical height of the first and second outer guide portions 222a2 and 222b2 is about 30 to 35 [mm].

As described above, if the upper cover body 221 is provided with the first and second branch guide portions 221a1,221b1 and the lower cover body 222 is provided with the first and second branch guide portions 222a1,222b1, the main transport path is provided. The transport air can be evenly guided to the upper left and right and the lower left and right of the 231. The branch guide portions provided on the upper and lower cover bodies 221,222 are not limited to a pair of left and right structures. For example, using one branch guide portion that connects the first outer guide portion 221a2 and the second outer guide portion 221b2, or the first outer guide portion 222a2 and the second outer guide portion 222b2 with a smooth curved surface, The upper cover body 221 or the lower cover body 222 may be configured. Further, as the end cover body, neither the upper cover body 221 nor the lower cover body 222 is provided, but the end cover body is provided only at one end, and air is returned to the first and second main transport walls 211 and 212. Only one row of holes 24 may be provided. In this case, at the other end where the end cover body is not provided, the space between the first main transport wall 211 and the second main transport wall 212 is closed with a shielding wall or the like so that the transport air does not leak and a sealed fluid passes through. The space 23 may be formed.

On the outer wall surfaces 211a and 212a of the first and second main transport walls 211 and 212 provided with the air return holes 24, the first and second outer guide portions 221a2 and 221b2 of the upper and lower cover bodies 221,222 A return guide portion 25 is provided to guide the guided transport air to the air return hole 24. The return guide portion 25 is a projecting body in which the air introduction opening 25a is located at least on the upstream opening edge 241 of the air return hole 24 and narrows toward the downstream opening edge 242 of the air return hole 24, and its cross section is substantially triangular. Shaped (see FIG. 2C). Further, the upper and lower portions on the upstream side of the return guide portion 25 are not formed as corner portions where turbulence is likely to occur, but are formed of smooth curved surfaces. The upper and lower curved surfaces gradually converge toward the upper end or the lower end of the downstream opening edge 242 of the air return hole 24, so that an upward induction curved surface is formed on the upper inner surface of the return guide portion 25. A downwardly guided curved surface is formed on the lower part of the inner surface. That is, the transport air guided from the air introduction opening 25a into the return guide portion 25 and guided to the upward guiding curved surface becomes a return flow that easily spreads upward when passing through the air return hole 24, and is guided to the downward guiding curved surface. When the conveyed transport air passes through the air return hole 24, it becomes a return flow that easily spreads downward. The air return hole 24 and the return guide portion 25 can be formed at the same time when the first and second main transport walls 211 and 212 are formed by resin processing. Of course, the return guide portion 25 may be formed by attaching the structure formed as a separate body along the edge portion of the air return hole 24.

When the bill 3 is to be transported and the air return holes 24 are provided in two rows corresponding to the upper and lower cover bodies 221 and 222, the vertical height of the return guide portion 25 is about 20 to 30 [mm]. When the direction width is about 8 to 15 [mm], the amount of protrusion of the return guide portion 25 is preferably about 3 to 6 [mm]. This is because the inflow angle of the return flow flowing from the air return hole 24 into the main transport path 231 (an acute angle formed by the inflow direction of the return flow and the transport direction) can be adjusted in the range of 15 to 30 °. When the return flow is strong, the inflow angle of the return flow is reduced to increase the distance until the return flow reaches the bill 3 flowing near the center of the main transport path 231. In this way, the flow-down force of the return flow that is too strong is attenuated by the time it reaches the banknote 3, and the return flow that has become a moderate flow-down force acts on the banknote 3. on the other hand. When the return flow is weak, the inflow angle of the return flow is increased to shorten the distance until the return flow reaches the bill 3 flowing near the center of the main transport path 231. In this way, the bill 3 can be reached before the return flow disappears, and the force for transporting the bill 3 downstream can be given from the return flow.

Since the return flow is discharged from each of the above-mentioned air return holes 24 into the main transport path 231, it is unlikely that the bill 3 will come into close contact with the air return holes 24. However, there is a concern that the bill 3 may be in close contact with the inner wall surfaces 211b and 212b between the adjacent air return holes 24 and the air return holes 24, making it impossible to carry the bills. Therefore, in the transfer pipe 2, the first and second main transfer means as a convex adhesion preventing means for preventing the bill 3 from adhering to the inner walls 211b and 212b of the first and second main transfer walls 211 and 212. Central side section ribs 26 are provided on the inner walls 211b and 212b of the walls 211 and 212.

The central side section rib 26 provides an opening section 213a which is a band-shaped range continuous in the vertical direction (direction orthogonal to the transport direction) including between the upstream side opening edge 241 and the downstream side opening edge 242 of the air return hole 24. It is a projecting body that is provided to avoid it. That is, in the close contact prevention section 213b between the two adjacent opening sections 213a, the projecting body provided at a position connected to the central opening edge 244 on the center side of the air return hole 24 in the transport direction is on the center side. It functions as a section rib 26. As a means for preventing adhesion, minute convex bodies (projections such as hemispherical, cylindrical, and triangular pyramids) are dispersedly arranged on the inner wall surfaces 211b and 212b so that the bill 3 does not adhere to the inner wall surfaces 211b and 212b. You may leave it. However, even if it is a minute convex body, there is a possibility that some adverse effect will occur on the return flow. Therefore, in the transport pipe 2 of the present configuration example, the central side section rib 26 formed by arranging a long member having a substantially quadrangular cross section in the transport direction is used as a contact preventing means.

The central side section rib 26 includes a first surface 261 projecting from the inner wall surfaces 211b and 212b of the first and second main transport walls 211 and 212, and a second surface 262 projecting substantially parallel to the first surface 261. It is provided with a smooth arc-shaped protruding surface 263 that connects the protruding ends of the first surface 261 and the second surface 262. Even if the banknote 3 carried from the upstream receives a force that sticks to the inner wall surfaces 211b and 212b, the banknote 3 presses against the arc-shaped protruding surface 263 of the central side section rib 26, so that the banknote 3 adheres to the inner wall surfaces 211b and 212b. It can be prevented from happening. Even if the bill 3 covers the central section rib 26, there are gaps on both the upper and lower sides of the central section rib 26 through which the transport air flows in the transport direction, so that the bill 3 naturally has an inner wall surface 211b. , 212b is peeled off and transported further downstream. When Japanese banknotes 3 are to be transported, the separation distance between the first surface 261 and the second surface 262 is about 2 to 4 [mm], and the maximum protrusion amount of the arc-shaped protruding surface 263 is about 2 to 4 [mm]. Is enough.

Further, on the upstream side of the central side section rib 26, the amount of protrusion gradually increases from the upstream end portion which is substantially flush with the inner walls 211b and 212b of the first and second main transport walls 211 and 212 toward the downstream side. An increasing upstream inclined surface 26a is provided. If the upstream-side inclined surface 26a is provided, even if the edge of the bill 3 conveyed from the upstream is close to the inner wall surfaces 211b and 212b, it is prevented from being caught by the central side section rib 26, and the upstream-side inclined surface is prevented. It can be guided to the center side in the left-right direction of the main transport path 231 along 26a. If the first and second main transport walls 211 and 212 and the central side section rib 26 are integrally provided by resin molding or the like, the inner wall surfaces 211b and 212b are connected to the upstream side inclined surface 26a without a step. It is ideal for deterring the catch. Of course, the central side section rib 26 created as a separate body may be attached to appropriate positions on the inner wall surfaces 211b and 212b of the first and second main transport walls 211 and 212. If the angle at which the upstream inclined surface 26a is inclined with respect to the inner wall surfaces 211b and 212b is approximately 20 ° to 45 °, the catching prevention function can be exhibited.

On the other hand, the downstream end surface 26b, which is the most downstream side of the central section rib 26, is provided at a position just along the upstream opening edge 241 of the air return hole 24 so as not to enter the opening section 213a. Since there is no possibility that the banknote 3 transported from the upstream is caught on the downstream end surface 26b, it is not necessary to make the downstream end surface 26b an inclined surface like the upstream inclined surface 26a. Therefore, the downstream end surface 26b is a wall surface orthogonal to the inner wall surfaces 211b and 212b at a position along the upstream side opening edge 241 of the air return hole 24 so that the protruding range of the central side section rib 26 can be maximized.

In this way, the central side section rib 26 is the inner wall surface of the first and second main transport walls 211 and 212 so that the upstream side inclined surface 26a is arranged on the upstream side and the downstream side end surface 26b is arranged on the downstream side. It is necessary to provide it to 211b and 212b. There is no problem when the central side section rib 26 is integrally molded with the first and second main transport walls 211 and 212, but the central side section rib 26 is configured separately from the first and second main transport walls 211 and 212. In this case, it is necessary to pay attention to the orientation when the central section rib 26 is attached to the first and second main transport walls 211 and 212. The rib 26 for the central side section, which is symmetrical in the vertical direction, can share the rib for mounting on the first main transport wall 211 and the rib for mounting on the second main transport wall 212. That is, the vertical direction when the central section rib 26 is attached to the first main transport wall 211 and the vertical direction when the central section rib 26 is attached to the second main transport wall 212 may be reversed. For example, when the central side section rib 26 is attached to the first main transport wall 211, the upstream inclined surface 26a is arranged on the upstream side by attaching the first surface 261 so as to be on the upper side. On the other hand, when the central side section rib 26 is attached to the second main transport wall 212, the upstream inclined surface 26a is arranged on the upstream side by attaching the second surface 262 so as to be on the upper side.

If the central side section rib 26 configured as described above is provided in the close contact blocking section 213b, it is possible to suppress the risk that the banknote 3 is in close contact with the inner wall surfaces 211b and 212b in the close contact blocking section 213b and cannot be transported. The central section rib 26 does not necessarily have to be provided along the central opening edge 244 of the air return hole 24, and may be provided slightly offset to the end side or the central side. However, if the arrangement position of the central section rib 26 is excessively shifted toward the end side from the central opening edge 244 of the air return hole 24, the flow down force of the return flow flowing from the air return hole 24 into the main transport path 231. Be careful as it may adversely affect the flow direction.

Further, as described above, in the opening section 213a, the feedback flow flows in from the two upper and lower air return holes 24 provided corresponding to the upper and lower cover bodies 221 and 222, and the bills are billed in the opening section 213a. Since the risk of the 3 sticking to each other is low, the central side section rib 26 may be provided in the sticking prevention section 213b. Rather, it is not preferable to extend the central section rib 26 to the opening section 213a. The return flow flowing in from the air return hole 24 not only flows in the transport direction, but also diffuses in the vertical direction from the end side opening edge 243 and the center side opening edge 244, and such a diffusion flow spreads to the bill 3. By reaching it, it is considered that the wall surface adsorption phenomenon of the bill 3 is suppressed. Therefore, if the central section rib 26 is extended so as to be along the central opening edge 244 of the air return hole 24, the diffusion flow toward the central side in the vertical direction in the main transport path 231 is hindered, and the bill 3 There is a possibility that the wall surface adsorption phenomenon cannot be suppressed. From this, it is desirable that the central side section rib 26 is provided only in the close contact prevention section 213b, avoiding the opening section 213a.

Further, the opening section 213a may include between the upstream opening edge 241 and the downstream opening edge 242 of the air return hole 24, and is appropriately upstream or downstream from the upstream opening edge 241. The opening section 213a may be appropriately set to the downstream side. When the downstream side of the opening section 231a is extended, the upstream side of the contact blocking section 213b becomes slightly narrower, so that the upstream end of the central section rib 26 is located slightly downstream of the downstream opening edge 242 of the air return hole 24. Will be done. If the upstream end of the central section rib 26 and the downstream opening edge 242 of the air return hole 24 are separated, the return that has flowed into the main transport path 231 from the vicinity of the downstream opening edge 242 of the air return hole 24. It is possible to further reduce the risk that the central section rib 26 has an adverse effect on the current flow force and the flow direction. Moreover, even if there is a slight gap between the upstream end of the central section rib 26 and the downstream opening edge 242 of the air return hole 24, the central section rib 26 has a strong force of the return flow. Even if it is shortened, the adhesion prevention function of the bill 3 is not impaired.

Further, the end side section rib 26'may be provided at a position along the end side opening edge 243 of the air return hole 24 in the close contact prevention section 213b (indicated by a two-dot chain line in FIG. 2). However, the end side section rib 26'is provided because the transport air is efficiently guided from the main transport path 231 to the first and second fluid induction empty portions 232a and 232b, and a necessary and sufficient feedback flow is obtained. Only if it is. Since the end side section rib 26'projects in the transport direction over the entire area of the close contact blocking section 213b, the airflow from the main transport path 231 to the first and second fluid induction vacant portions 232a and 232b is disturbed. There is a risk. For this reason, it is not desirable to provide the end side section rib 26'when the circulating flow guided to the first and second return induction empty portions 233a and 233b is drastically reduced and a sufficient feedback flow cannot be obtained. .. If it is appropriately on the center side (opposite side of the upper and lower cover bodies 221,222 arrangement side) from the end side section rib 26', the circulation guided to the first and second return induction empty portions 233a and 233b. Since the flow is not extremely reduced, it is easy to provide section ribs. Of course, a plurality of section ribs may be provided at a plurality of locations to prevent close contact.

In the banknote transfer device 1 of the present embodiment configured as described above, the banknote 3 is provided with the first and second main transfer walls by providing the contact preventing means (center side section rib 26, end side section rib 26'). It is possible to suppress sticking to the inner wall surfaces 211b and 212b of 211 and 212, and to stably transport the bill 3 in the transport pipe 2. In order to explain the usefulness of the close contact preventing means, a transport operation when a transport pipe 2-0 not provided with the close contact preventing means is used will be described. As shown in FIG. 3, the transport pipe 2-0 is in close contact with the inner walls 211b and 212b of the first and second main transport walls 211 and 212, such as the central side section rib 26 and the end side section rib 26'. It does not have a function equivalent to a blocking means.

The principle of generating the feedback flow in the transfer pipe 2-0 not provided with the contact blocking means is shown in FIGS. 4A and 4B. Note that FIG. 4B shows the outer wall surface 212a side of the second main transport wall 212 through the upper and lower cover bodies 221 and 222 through the second fluid induction empty portion 232b and the second feedback induction empty portion 233b. Indicates the state.

As described above, in the transport pipe 2 to which the pressurized transport air is sent, pressure is generated to push the upper, lower, left and right wall surfaces outward. The force that pushes the first and second branch guide portions 221a1,222a1,221b1,222b1 of the upper and lower cover bodies 221,222 outwards pushes the transport air outward from the first and second fluid guidance empty portions 232a and 232b. 1, Second feedback guidance Acts as a force to guide the empty parts 233a and 233b. The upper and lower cover bodies 221,222 include the first branch guide portions 221a1,222a1 and the second branch guide portions 221b1,222b1 on the left and right sides of the intermediate portion between the first main transport wall 211 and the second main transport wall 212. Because the airflow is provided, the airflow branches evenly to the left and right.

Moreover, the inner surface of the first and second branch guiding portions 221a1,221b1 protrudes outward (in the direction away from the main transport path 231) and smoothly connects to the first and second outer guiding portions 221a2 and 221b2. Since it is a surface, it is easily guided to the first and second feedback guidance empty portions 233a and 233b by the Coanda effect. The Coanda effect is the property that the viscous fluid flows along the adjacent wall surface, and since the transport air is also the viscous fluid, it flows along the inner surfaces of the upper cover body 221 and the lower cover body 222. Makes sense.

Therefore, a part of the transport air pumped into the transport pipe 2 is sent from the main transport path 231 to the first and second fluid induction vacant portions 232a and 232b, and further, the first and second return guide vacant portions 233a,. It is guided to 233b and wraps around to the outer wall surfaces 211a and 212a of the first and second main transport walls 211 and 212. Since this air flow continues without interruption, the transport air that wraps around to the outer wall surfaces 211a and 212a of the first and second main transport walls 211 and 212 is not extremely decompressed. The transport air that has reached the outer wall surfaces 211a and 212a of the first and second main transport walls 211 and 212 heads downstream in the first and second return induction empty portions 233a and 233b, and is located in the main transport path 231. It is guided to the center side (downward in the upper cover body 221 and upper in the lower cover body 222).

When the transport air guided to the first and second return guidance empty portions 233a and 233b reaches the return guide portion 25 of the air return hole 24, it is introduced from the air introduction opening 25a and is introduced through the air return hole 24. 1 It is a return flow returned to the inner wall surface 211b side of the main transport wall 211. Even if the transport air reaches the lower portion of the first return guidance empty portion 233a without reaching the return guide portion 25, the lower portion of the first return guidance empty portion 233a is blocked by the terminal bending portion 221a2-e. , Flows further downstream along the terminal bent portion 221a2-e. Since the air return holes 24 are also provided downstream thereof at appropriate intervals, a part of the transport air that has reached the return guide portion 25 of the downstream air return hole 24 is introduced from the air introduction opening 25a and the return flow. It becomes.

Although a part of the transport air pumped into the transport pipe 2-0 reaches from the main transport path 231 to the first and second fluid induction vacant portions 232a and 232b, the first and second fluid induction vacancy is maintained as it is. The proportion of the transport air flowing downstream in the portions 232a and 232b is large. According to the experimental results of the transport pipe 2-0, the amount of transport air guided from the first and second fluid induction empty portions 232a and 232b to the first and second feedback induction empty portions 233a and 233b was 50% or less. Therefore, in order to efficiently guide the transport air from the first and second fluid induction empty portions 232a and 232b to the first and second feedback induction empty portions 233a and 233b, the induction plate 7 (two-dot chain line in FIG. 3). (Indicated by) may be provided.

As shown in FIG. 3, for example, in the first and second branch guiding portions 221a1,221b1,222a1,222b1 provided on the upper and lower cover bodies 221 and 222, respectively, in the first and second fluid guiding empty portions 232a and 232b. A guide plate 7 is provided so as to project from the center. The guide plate 7 is a plate-like body having an appearance in which a semicircular arc-shaped plate material is stretched in the chord direction, and the first and first surfaces are directed so that one first surface faces the upstream side and the other second surface faces the downstream side. It is attached diagonally to the two-branch guide portion 221a1,221b1,222a1,222b1. Therefore, the arcuate curved edge portion of the guide plate 7 is set to have a curvature so as to be in close contact with the concave inner surface of the first and second branch guide portions 221a1,221b1,222a1,222b1. The flat edges of the guide plates 7 attached to the first and second branch guide portions 221a1,221b1,222a1,222b1 are substantially parallel to the air blowing direction WD of the transport air, and the main transport paths 231 and the first and first It is located near the boundary between the two fluid-guided empty sections 232a and 232b.

Further, in the upper cover body 221, the upstream end portion of the guide plate 7 provided on the first branch guide portion 221a1 and the upstream end portion of the guide plate 7 provided on the second branch guide portion 221b1 are the first branch guide portion 221a1. And the second branch guide portion 221b1 are brought into contact with each other or brought close to each other at the connecting portion. Since the connecting portion between the first branch guide portion 221a1 and the second branch guide portion 221b1 is located at an intermediate position between the first and second main transport walls 211 and 212, the pair of left and right guide plates 7 and 7 are the main transport paths. It functions as a V-shaped wedge that bisects the transport air going downstream while press-fitting upward from 231. Similarly, in the lower cover body 222, the pair of left and right guide plates 7 and 7 are brought into contact with each other or brought close to each other at the connecting portion between the first branch guide portion 222a1 and the second branch guide portion 222b1.

On the other hand, the downstream end of the guide plate 7 is a connecting portion (or a first and second branch guide) between the first and second branch guide portions 221a1,221b1 and the first and second outer guide portions 221a2 and 221b2. It is located in the vicinity of the connecting portion between the portions 222a1,222b1 and the first and second outer guiding portions 222a2, 222b2). Thus, the first and second fluid guidance empty portions 232a and 232b to the first and second return induction empty portions are provided by the guidance plates 7 provided in the first and second branch guidance portions 221a1,221b1,222a1,222b1 respectively. The transport flow can be smoothly guided to 233a and 233b.

When the guide plate 7 is arranged in this way, the transport air pressed into the upper and lower cover bodies 221, 222 from the main transport path 231 smoothly flows along the guide plate 7 to the first and second main transport walls 211. , 212 are guided to the outer wall surfaces 211a, 212a side. According to the experimental results of the transport pipes 2 and 2-0 provided with the guide plate 7, the transport air guided from the first and second fluid guidance empty portions 232a and 232b to the first and second feedback induction empty portions 233a and 233b. Was significantly improved to over 80%.

Next, the behavior of the return flow flowing from each air return hole 24 into the main transport path 231 will be described with reference to FIG. In addition, in FIGS. 5A to 5C, the upper cover body 221 of the transport pipe 2-0 is cut out substantially horizontally in the transport direction, and the main transport path 231 and the first and second return induction empty portions 233a, The state where 233b is seen from the information is shown. In FIGS. 5A to 5C, the circulating flow Fg guided from the first and second fluid guided empty portions 232a and 232b to the first and second return guided empty portions 233a and 233b is the air of the return guide portion 25. It is introduced from the introduction opening 25a and becomes a feedback flow. Further, a part of the transport air that has reached the downstream side of the return guide portion 25 without being introduced into the air introduction opening 25a may become a return flow from the air return hole 24 further downstream.

FIG. 5A shows a transfer pipe 2-0a having an ideal design, and the inner wall surface 211b, due to the return flow from each air return hole 24 of the first and second main transfer walls 211 and 212, Lateral flows Fr and Fr along 212b are formed, and a central flow Fc that is sandwiched between them and travels straight in the transport direction is formed. In the transport pipe 2-0a, the transport air does not flow into the opening surface of each air return hole 24 from the upstream and interfere with the return flow to generate turbulent flow. Therefore, it is controlled by adjusting the angle of the return guide unit 25. The return flow can reach the central flow Fc at a possible inflow angle.

When lateral flows Fr and Fr having a flow velocity that can confine the central flow Fc from both sides to the center are obtained, a transport pipe 2-0a having a structure that does not flow from the upstream into the opening surface of each air return hole 24 is designed. This is not realistic, but it is a virtual ideal design. In the transport pipe 2-0a, when the return flow reaches both sides of the bill 3, the bill 3 is stably held substantially in the center of the central flow Fc without meandering to the left or right, and further, the return flow. It will be efficiently transported by receiving a force toward the transport direction (downstream).

At this time, it is desirable that the flow velocity of the return flow reaching both sides of the bill 3 is not too strong or too weak, and is moderate. If the return flow is too strong and exceeds the vicinity of the center of the main transport path 231, a turbulent flow will occur due to interference with the opposing return flow, and the bill 3 will be involved in this turbulent flow, resulting in improved transport efficiency. It will drop. If the return flow is weak and does not reach the bill 3 near the center of the main transport path 231, the force in the transport direction cannot be applied to the bill 3, and the bill 3 meanders to the left and right. Efficient transport is difficult. That is, the flow velocity of the return flow that reaches both sides of the bill 3 is not too strong to cause turbulence due to the interference of the opposing return flows, and it is desirable that the flow velocity reaches the vicinity of the center of the main transport path 231.

As described above, when the return flow flowing from the air return hole 24 into the main transport path 231 is strong, the distance until the return flow reaches the bill 3 flowing near the center of the main transport path 231 may be increased. .. If the return flow flowing from the air return hole 24 into the main transport path 231 is weak, the inflow angle of the return flow is increased until the return flow reaches the bill 3 flowing near the center of the main transport path 231. The distance should be shortened. However, if the inflow angle is increased (approached to 90 °) in order to allow the return flow to reach the vicinity of the center of the main transport path 231, the force for directing the return flow in the transport direction is weakened, and the original transport function is impaired.

Therefore, if the return flow obtained from the air return hole 24 is too weak, it is desirable to take measures such as providing a guide plate 7. In addition, as a measure for obtaining an appropriate return flow, it is conceivable to efficiently flow the circulating flow Fg guided to the first and second return induction empty portions 233a and 233b into the air introduction opening 25a. The transport air that has reached the downstream side of the return guide portion 25 without flowing into the air introduction opening 25a is expanded formed by the inner wall surfaces of the upper and lower cover bodies 221,222 and the inclined surface of the return guide portion 25. A turbulent flow is generated in the space, and the flow is in a direction different from that of the circulating flow Fg, which may adversely affect the downstream circulating flow Fg. In order to reduce the influence, the arrangement interval of the return guide portion 25 (arrangement interval of the air return hole 24), the inclination angle of the return guide portion 25 (inflow angle of the return flow), the opening shape of the air introduction opening 25a, etc. With proper setting, it is possible to obtain a proper return flow.

FIG. 5B shows the transport pipe 2-0b designed so that a sufficient return flow cannot be obtained, and the side currents Fr and Fr on both sides along the inner wall surfaces 211b and 212b are weak. In addition, the central flow Fc has spread to the left and right. In the transport pipe 2-0b, even if the transport air flows into the opening surface of each air return hole 24 from the upstream, it is unlikely to interfere with the return flow and generate harmful turbulence, but the return flow is near the center of the central flow Fc. It is difficult to reach the banknote 3 of. If the return flow cannot reach both side surfaces of the bill 3 near the center of the side flow central flow Fc, it is difficult to obtain high transfer efficiency as in the above-mentioned transfer tube 2-0a.

In the transport pipe 2-0b, since the return flow is weak, it can affect only the vicinity of the inner wall surfaces 211b and 212b, so that the bill 3 flows in the central flow Fc spreading to the left and right while meandering to the left and right. There is a high possibility that the bill 3 will be in an unstable state. Further, if the banknote 3 comes into contact with the inner wall surfaces 211b and 212b for some reason and closes the air return hole 24, the return flow does not occur and there is a risk that the banknote 3 will stick to the inner wall surfaces 211b and 212b as it is. is there. In that case, unless a force is applied from the outside, the bill 3 does not come off from the inner wall surfaces 211b and 212b, so that the bill 3 cannot be transported.

FIG. 5C shows a transfer pipe 2-0c designed so that a too strong return flow flows into the main transfer path 231 from the air return hole 24, and the transfer air is provided in each air return hole 24. It is a state in which it flows into the opening surface from the upstream and interferes with a strong return flow to generate a vortex-like turbulent flow. Due to the influence of this turbulent flow, small vibrations are repeatedly generated in the bill 3 flowing near the center of the main transport path 231, so that efficient transport cannot be realized.

In addition, if the return flow is too strong, as in the transport tube 2-0c, further problems may occur. For example, if a crease is made so that the front surface 3a and the back surface 3b are asymmetrical as in the banknote (habit tag 3') shown in FIG. 6, even if the return flow of the same strength acts from both sides of the habit tag 3'. , The front surface 3a and the back surface 3b of the habit tag 3'may receive different forces.

The habit tag 3'in FIGS. 6 (A) and 6 (B) is substantially parallel to the upper edge 31t and the lower edge 31b in the longitudinal direction and has a bending habit at the upper bending line 32a, the middle bending line 32b, and the lower bending line 32c at equal intervals. ing. The upper polygonal line 32a has a valley on the front surface 3a side (the back surface 3b side is a mountain), the middle polygonal line 32b has a mountain on the front surface 3a side (the back surface 3b side is a valley), and the lower polygonal line 32c has a valley on the front surface 3a side (the back surface 3b side is a mountain). Therefore, between the first folding line 331 between the upper edge 31t and the upper bending line 32a, the second folding portion 332 between the upper bending line 32a and the middle bending line 32b, and between the middle bending line 32b and the lower bending line 32c. A certain third folding portion 333, the fourth folding portion 334 between the lower folding line 32c and the lower edge 31b, has different inclination directions from each other. For example, when the habit tag 3'is set up so that the upper edge 31t is on the top and the lower edge 31b is on the bottom, the first fold portion 331 and the third fold portion 333 have a surface with the surface 31a side facing upward, the second. The folded portion 332 and the fourth folded portion 334 are surfaces facing upward on the back surface 31b side.

A state in which the front surface 31a side of the habit tag 3'is arranged on the first main transport wall 211 and the back surface 31b side is arranged near the center of the main transport path 231 of the transport pipe 2-0c so as to face the second main transport wall 212. It is shown in 7 (a). The return flow from each air return hole 24 of the first main transport wall 211 and the return flow from each air return hole 24 of the second main transport wall 212 are the same, there is no extreme bias, and the other inner wall surface 211b, It should be strong enough to reach 212b. However, since the forces received by the front surface 3a and the back surface 3b of the habit tag 3'are different, the habit tag 3'is pressed toward the first main transport wall 211 side as shown in FIG. 7B.

Specifically, in the upper half of the back surface 3b of the habit tag 3'facing the second main transport wall 212, the return flow from the upper air return hole 24 is supplied by the first folding portion 331 and the second folding portion 332. The fluid pressure is concentrated on the upper polygonal line 32a. Similarly, in the lower half of the back surface 3b of the habit tag 3', the return flow from the lower air return hole 24 is received by the third folding portion 333 and the fourth folding portion 334, and the fluid pressure is concentrated on the lower folding line 32c. To do. Therefore, the force of pressing the back surface 3b of the habit tag 3'toward the first main transport wall 211 by the return flow efficiently acts.

On the other hand, in the upper half of the surface 3a of the habit tag 3'facing the first main transport wall 211, the return flow from the upper air return hole 24 is received by the first folding portion 331 and the second folding portion 332. The fluid pressure of the first bent portion 331 escapes upward, and the pressure received in the lateral direction is reduced. Similarly, in the lower half of the surface 3a of the habit tag 3', the return flow from the lower air return hole 24 is received by the third folding portion 333 and the fourth folding portion 334, but the fluid pressure of the fourth folding portion 334. Will come out downwards and the lateral pressure will be reduced. Therefore, on the surface 3a of the habit tag 3', the return flow received by the second folding portion 332 and the third folding portion 333 is concentrated on the middle folding line 32b, and the habit tag 3'is placed on the second main transport wall 212 side. It acts as a pushing force, but the pushing pressure on the first folding portion 331 and the fourth folding portion 334 does not act so much.

As shown in FIG. 7, even if the feedback flow flowing from each air return hole 24 of the first main transport wall 211 and the feedback flow flowing from each air return hole 24 of the second main transport wall 212 are equivalent. The force acting on the back surface 3b of the habit tag 3'is superior to the force acting on the front surface 3a of the habit tag 3'. Therefore, the habit tag 3'is pressed against the inner wall surface 211b of the first main transport wall 211, and there is a risk that the habit tag 3'is stuck to the inner wall surfaces 211b and 212b and cannot be transported.

As described above, in the transport pipe 2-0 not provided with the contact preventing means, there is a risk that the bill 3 sticks to the inner wall surfaces 211b and 212b even if the return flow is too weak or the return flow is too strong. Therefore, the banknote 3 cannot be stably transported. On the other hand, in the bill transfer device 1 of the present embodiment, by providing the contact preventing means in the transport pipe 2, the bill 3 is prevented from sticking to the inner walls 211b and 212b of the first and second main transport walls 211 and 212. Therefore, it becomes possible to carry out stable transportation of the bill 3.

In the transport pipe 2 of the first configuration example described above, the central side section rib 26 or the end side section rib 26'was used as the contact preventing means, but it is desirable that the ribs are originally provided in a continuous state without interruption. .. Therefore, the transport pipe 2'of the second configuration example shown in FIG. 8 has an air return hole 24 located on the upstream side of the close contact prevention region BA from the close contact prevention region BA between two adjacent air return holes 24. A through rib 27 is provided so as to pass through to the upstream side edge portion of the above. The contact blocking region BA is within the contact blocking section 213b and is limited to the center side of the end side opening edge 243 of the air return hole 24 and the end side of the center side opening edge 244 of the air return hole 24. Is. Assuming that the range in which the close contact prevention region BA and the air return hole 24 located on the upstream side thereof are continuous is the reference continuous range RCR, the through ribs 27 are continuously provided in the plurality of reference continuous range RCRs. That is, the through rib 27 is a long convex body that is seamlessly continuous in two or more reference continuous range RCRs. The convex shape of the through rib 27 includes a first surface 271 projecting from the inner walls 211b and 212b of the first and second main transport walls 211 and 212, and a second surface 272 projecting substantially parallel to the first surface 271. A smooth arc-shaped protruding surface 273 connecting the protruding ends of the first surface 271 and the second surface 272 is provided.

However, by providing the through rib 27 substantially parallel to the transport direction, the return flow flowing into the main transport path 231 is prevented from being adversely affected. Further, it is desirable that the through ribs 27 are provided at the vertical center positions (positions including the center line CL) of each air return hole 24. If the through rib 27 is provided in the end direction or the center direction from the vertical center position of the air return hole 24, as described above, it affects the diffusion of the return flow in the vertical direction, and the bill 3 There is a possibility that the wall surface adsorption phenomenon cannot be suppressed. However, when the through rib 27 is provided at the center position in the vertical direction of the air return hole 24 having an opening shape symmetrical in the vertical direction, it has almost no effect on the diffusion of the return flow in the vertical direction. The wall surface adsorption phenomenon can be suppressed by the feedback flow. Of course, as long as the diffusion of the return flow in the vertical direction is not adversely affected, the through rib 27 may be provided by slightly shifting the air return hole 24 vertically from the center position in the vertical direction.

Further, if the through rib 27 and the first and second main transport walls 211 and 212 are integrally formed, the through rib 27 having the same length as the first and second main transport walls 211 and 212 and having no break can be formed. Of course, the first and second main transport walls 211 and 212 and the through ribs 27 may be provided as separate bodies. In that case, the through ribs 27 having an appropriate length may be added and arranged over the entire area of the first and second main transport walls 211 and 212. When adding through ribs 27 shorter than the wall lengths of the first and second main transport walls 211 and 212, it is desirable that the seams be within the adhesion prevention region BA. If the seam is inside the air return hole 24, the work of connecting the through ribs 27 becomes complicated, and there is a risk that the return flow acts on the seam for a long time to reduce the strength or the seam comes off. ..

In the transport pipe 2'of the second configuration example described above, the through ribs 27 are provided through one or more reference continuous range RCRs, and the situation where the air return hole 24 is blocked by the bill 3 can be reliably prevented. It is considered that it is sufficient to suppress the wall surface adsorption. However, if there is a relatively wide flat surface on the end side or the center side of the through rib 27, the bill 3 may stick to the inner wall surfaces 211b and 212b. Therefore, in the transport pipe 2 ″ of the third configuration example shown in FIG. 9, in addition to the through rib 27, the above-mentioned central side section rib 26 and end side section rib 26 ′ are provided. If the central side section rib 26 and the end side section rib 26'are provided in addition to the rib 27, a flat surface wide enough to attract the bill 3 being transported is not generated, so that the bill 3 has inner wall surfaces 211b and 212b. The possibility of sticking to the banknote can be further suppressed.

Although the paper leaf transport device 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 as long as the configuration described in the claims is not changed. All paper leaf transport devices are included in the scope of rights.

1 Banknote transport device 2 Transport pipe 211 1st main transport wall 212 2nd main transport wall 221 Upper cover body 221a1 1st branch guide 221a2 1st outer guide 221b1 2nd branch guide 221b2 2nd outer guide 222 Lower cover body 222a1 1st branch guidance part 222a2 1st outer guidance part 222b1 2nd branch guidance part 222b2 2nd outer guidance part 23 Fluid passage space 231 Main transport path 232a 1st fluid guidance empty part 232b 2nd fluid guidance empty Part 233a 1st return guidance empty part 233b 2nd return guidance empty part 24 Air return hole 26 Central side section rib 3 Banknote

Claims (6)

A paper leaf transport device that transports paper sheets from upstream to downstream through a transport pipe through which a transport fluid flows from upstream to downstream.
The transport pipe in which a fluid passage space including a main transport path for transporting the paper leaves is formed is a pair of main transport wall portions whose inner wall surface sides are arranged so as to face the two main surfaces of the paper leaves. And an end cover provided on at least one end side of the main transport wall portion in two directions orthogonal to the transport direction of the paper sheets.
On the end cover arrangement side of the facing main transport wall portion, fluid return holes through which the transport fluid can pass are provided at required intervals from each outer wall surface side to each inner wall surface side.
The end cover comprises a branch guide portion for generating a fluid guide empty portion for guiding the transport fluid from each inner wall surface side of the opposite main transport wall portion to each outer wall surface side, and the fluid guide empty portion. A pair of outer guiding portions that generate a return guiding empty portion capable of guiding the transporting fluid guided to each outer wall surface side of the facing main transport wall portion through the fluid return hole are provided.
The paper leaf transport is provided on the inner wall surface side of the main transport wall portion with a convex adhesion preventing means for preventing the paper leaves from adhering to the inner wall surface of the main transport wall portion. apparatus. The adhesion blocking means is provided only in the adhesion blocking section between the two adjacent opening sections, avoiding the opening section including between the upstream side edge portion and the downstream side edge portion of the fluid return hole. The paper leaf transport device according to claim 1, wherein the paper leaf transport device is a section rib. The second aspect of the present invention, wherein the section rib is provided at least in the close contact prevention section at a position connected to the opposite edge portion of the fluid return hole on the end cover arrangement side in the transport direction. Paper leaf transport layer device. The contact blocking means is a through rib provided through the contact blocking region between the two adjacent fluid return holes to the upstream edge of the fluid return hole located on the upstream side of the contact blocking region. The paper leaf transport device according to any one of claims 1 to 3, wherein the paper leaf transport device is provided. The range in which the contact blocking region between the two adjacent fluid return holes and the fluid return hole located on the upstream side of the contact blocking region are continuous is defined as a reference continuous range.
The paper leaf transport device according to claim 4, wherein the through ribs are provided through one or more of the reference continuous ranges. The fluid return hole has an opening shape that is symmetrical with respect to a center line parallel to the transport direction in a direction orthogonal to the transport direction.
The paper leaf transport device according to claim 4 or 5, wherein the through rib is provided at a position including the center line of the fluid return hole.