JP2006198208A - Token washing machine and water absorbing roller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve water absorption efficiency by adopting water absorbing rollers of improved water absorption efficiency for a token washing roller. <P>SOLUTION: A token M washed in a washing tub 35 is sent to between water absorbing rollers 3 and passes through between them so that stuck water is transferred to elastic water absorbing layers 7 being the outer layers of the water absorbing rollers 3. At the core members 5 of the water absorbing rollers 3, a large number of through holes 5e communicating between the water absorbing layers 7 and hollow parts 5d are arranged. The elastic water absorbing layers 7 containing much water are compressed when receiving pressure in the case of passing through of the medal M. By the compression, the water enters inside of the hollow parts of the core members through the through holes, and drops from an opening end part as waterdrops W. In order to accelerate a water stream in the hollow part, the peripheral wall of the hollow part is tapered for increasing an inner diameter on an opening side more than one end, or the peripheral wall of the hollow part is tapered for increasing the inner diameter of both of opening ends more than a center part. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a medal washing machine for washing game media such as medals used in a gaming machine such as a pachislot machine and a water absorbing roller usable in such a medal washing machine.

Conventionally, as a cleaning device for game media (medals or coins) used in gaming machines, a medal transported from a game island is washed in a washing tank and then dried by a drying means and then reused. Yes. As a drying means, one having a pair of drying rollers in which a water-absorbing material is wound around the outer periphery of the central core portion has been proposed. When the medal passes between these rollers, the moisture can be removed by transferring the moisture to the water-absorbing roller.
JP 2002-239189 A

  In addition, as a medal drying means, there is a medal drying device that employs a pair of drying rollers in which a water-absorbing material is wound around the outer periphery of a central core as a cassette. FIG. 8 shows an example thereof. As a drying means D, two pairs of drying rollers 91 and 91 set in a cassette 93 are juxtaposed, and a medal M passes between the two drying rollers 91 and 91. In this case, moisture can be removed. The drying roller 91 is formed by winding a water-absorbing material 97 around the outer periphery of the central core portion 95 as shown in FIG. When the cleaned medal M enters the drying means D from the cleaning tank of the previous process, the water-absorbing material 97 is elastically deformed by the volume of the medal, and the water adhering to the medal surface is transferred and removed. It has become.

  As described above, when moisture adhering to the medal is removed with the water-absorbing material 97, water gradually accumulates in the water-absorbing material 97, and soon becomes saturated. To do. Actually, as shown in FIG. 8, due to the deformation of the water-absorbing material 97 when the medal M passes between the drying rollers 91, 91, the deformed portion and the water around it become water droplets W. The ink is dripped from the surfaces of the drying rollers 91 and 91. However, since the water content of the water-absorbing material 97 is in a saturated state or a state close thereto, the medal water removal efficiency is low. For this reason, it is necessary to enhance the apparatus and heat source for heating and drying as the next process, which causes the apparatus to be complicated and increase the running cost. The present invention is intended to improve the water removal capability of a cleaned medal in a medal washing machine.

  The medal washing machine according to the first aspect of the present invention includes a washing tank for washing a medal, a water absorbing means for sucking water adhering to the medal discharged from the washing tank, and water discharged from the water absorbing means. And a purifying water tank for collecting and purifying the water, and a reflux tube for supplying the washing water purified by the purifying water tank to the washing tank. The water absorbing means includes at least one pair of water absorbing rollers provided so as to be in contact with each other or a gap thinner than the thickness of one medal, and each of the water absorbing rollers is open at one end or at both ends. A cylindrical core member having a hollow portion and an elastic water-absorbing layer having a predetermined thickness formed on the outer periphery of the core member. The core member communicates the hollow portion and the elastic water-absorbing layer. It is characterized in that a plurality of through holes are formed.

  Due to the above configuration, the cleaning liquid (moisture) attached to the surface of the medal cleaned and discharged in the cleaning tank is adsorbed by the water absorbing means. That is, each of the water absorption rollers contacts the medal surface by receiving the cleaned medal between the elastic water absorption layers, and thereby sucks the adhering water. Each of the elastic water-absorbing layers when receiving medals is elastically deformed by the pressure received from the medals that have entered between them. This point is basically the same, although there is a difference in the magnitude of pressure, even when the elastic water-absorbing layers are in contact with each other or even when facing through the gap. . Each elastic water-absorbing layer is reduced in volume due to its elastic deformation, so that the accumulated moisture is pushed out from each elastic water-absorbing layer. Since the water is pushed out in the direction of the core member, the water pushed out in the direction of the core member is pushed out into the cavity through the plurality of through holes. Here, when the medals that have deformed each of the elastic water-absorbing layers pass along with the rotation of each of the elastic water-absorbing layers (water-absorbing rollers), the pressure received from the medals disappears, so that each elastic water-absorbing layer returns to elasticity to some extent. Due to this elastic return, the volume of each elastic water-absorbing layer is restored completely or to some extent, so that the water storage capacity of each elastic water-absorbing layer is restored by the amount of the return. That is, the ability to absorb moisture increases. Therefore, the water adhering to the subsequent medal surface can be efficiently absorbed by each elastic water absorption layer. The water pushed out into the cavity is discharged from one end or both ends of the core member, and does not return to each elastic water absorption layer again.

  The invention described in claim 2 is such that the central axis of the hollow portion coincides with or substantially coincides with the central axis of the core member, and the peripheral wall surrounding the hollow portion is larger than the inner diameter of one end of the core member. It is characterized in that it is formed into a taper that increases the inner diameter of the other end or a taper that increases the inner diameter of both ends of the core member rather than the inner diameter of the central portion of the core member. As described above, the moisture that has advanced into the cavity from the elastic water-absorbing layer through each of the above-mentioned through holes depends on the rotational speed of the water-absorbing roller, but the gravity acting on the water rather than the centrifugal force generated by the rotation is more Since it is generally large, most of the water flows through the rotating peripheral wall and collects at its lower end. The collected water closes the through-hole, and in some cases, it can be reversed by centrifugal force. In this case, since it may interfere with new moisture extrusion, it is desired to remove the moisture from the cavity as soon as possible. It is the taper of the peripheral wall that promotes such moisture removal, and the water outflow is efficiently performed by the downward slope of the taper of the peripheral wall in the direction of water outflow. If the moisture outflow is performed efficiently, each through-hole is in a state where it is easy to accept moisture, thereby further improving the moisture absorption efficiency.

  The invention described in claim 3 is characterized in that the water absorbing roller is provided with at least one spiral groove portion for promoting drainage in the length direction on the peripheral wall. As described above, it is highly resistant that water entering from each through hole flows over the openings of the through holes arranged in the cavity, and in some cases, the moisture is elastically absorbed from the through holes by centrifugal force. Therefore, a spiral groove is provided on the peripheral wall of the cavity, and the outflow of moisture is further promoted along the spiral groove. The spiral groove portion can flow out in such a manner that moisture collected in the spiral groove portion is pushed out by the centrifugal force component and the spiral motion caused by the rotation of the water absorption roller. Therefore, it is desirable that the lead of the spiral groove and the direction thereof differ depending on the rotation direction and the rotation speed of the water absorption roller. It is desirable that the spiral groove portion is provided with a plurality of strips so that the moisture that has entered the cavity portion can be easily guided to the spiral groove portion located immediately nearby. If the rotational speed of the water absorption roller and the lead angle of the spiral groove are adjusted so that the above-mentioned centrifugal force component works well along the groove, moisture will easily flow out along the spiral groove and be collected. Water can be pushed out efficiently, so that the drainage effect can be enhanced. If this spiral groove portion is provided on the peripheral wall surface of the water-absorbing roller having a tapered peripheral wall according to claim 1, the drainage effect can be further enhanced by the synergistic effect of the taper and the spiral groove portion.

  According to a fourth aspect of the present invention, the water absorbing roller that can be used in the medal washing machine according to any one of the first to third aspects is an independent invention. This water absorption roller can be used in the medal washing machine according to any one of claims 1 to 3. Further, each of these water absorption rollers can be used for a medal washing machine of a different type from the medal washing machine according to the present invention, other washing machines, and the like, so that it is established as an independent invention. As described above, the water-absorbing roller according to the first aspect of the present invention includes a cylindrical core member having a hollow portion that is open at one end or open at both ends, and an elastic water-absorbing layer having a predetermined thickness formed on the outer periphery of the core member. The core member is formed with a plurality of through-holes communicating the cavity and the elastic water absorption layer. In the water absorbing roller according to the second aspect of the present invention, the central axis of the hollow portion is coincident with or substantially coincident with the central axis of the core member, and the peripheral wall surrounding the hollow portion is from the inner diameter of one end of the core member. Also, a taper that increases the inner diameter of the other end or a taper that increases the inner diameter of both ends of the core member than the inner diameter of the central portion of the core member. Furthermore, in the water absorbing roller according to the third aspect of the present invention, at least one spiral groove portion for promoting drainage is provided on the peripheral wall of the hollow portion so that the lead extends in the length direction.

  In the water absorbing means used in the medal washing machine, the present invention is provided with a plurality of through-holes communicating with the hollow portion formed in the core member and the elastic water absorbing layer in the core member of the water absorbing roller constituting the water absorbing means. This makes it possible to allow moisture in the elastic water-absorbing layer to enter the cavity and reduce the moisture on the surface side of the elastic water-absorbing layer where the water is removed from the medal, thus improving the water removal efficiency from the cleaned medal. be able to. As a result, the moisture that has entered the cavity portion of the water absorption roller from the elastic water absorption layer is discharged from the end portion that is the opening of the cavity portion, so that the moisture accumulated in the elastic water absorption layer flows toward the cavity portion of the core member. Therefore, it becomes possible to perform the water removal operation of the medal in a state where there is little water on the surface side of the elastic water absorption layer. Moreover, it becomes possible to improve the washing | cleaning efficiency of a medal washing machine by becoming easy to flow in the water | moisture content of an elastic water absorption layer toward the cavity part of a core member.

  Next, the water absorption roller has the central axis of the cavity portion aligned or substantially aligned with the central axis of the core member, and the peripheral wall surrounding the hollow portion has an inner diameter at the other end larger than the inner diameter at one end of the core member. Since the taper or the taper that makes the inner diameter of both ends of the core member larger than the inner diameter of the central part of the core member makes drainage easier because the portion that should be a water channel becomes an inclined surface, efficiency Moisture removal is possible. Next, for each of the water absorbing rollers described above, if at least one spiral groove portion is provided on the peripheral wall of the cavity portion so that the lead extends along the length direction of the cavity portion, the water collecting rollers gather in the spiral groove portion according to the rotation of the water absorbing roller. Since moisture can be easily discharged by being pushed out by the centrifugal force component and the spiral motion accompanying rotation, the water removal efficiency from the medal can be improved. In addition, since the water absorption roller according to the present invention has high water absorption efficiency, among other types of medal cleaning devices as game machine media, for example, a cleaning machine such as an IC coin in which an IC chip is incorporated in a game media, etc. Since it can be applied to a wide range of uses such as being applicable to the above, it is highly versatile.

  Next, a medal washing machine as one embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows the overall configuration of the medal washing machine, and FIG. 2 also shows the overall configuration, partially showing the internal configuration. FIG. 3 is an exploded perspective view of the main part. As shown in FIG. 1, this medal washing machine is configured by placing a washing machine body 33 on a base 31 formed in a rectangular box shape and fixing them with bolts. The cleaning machine main body 33 includes a circular container-shaped cleaning tank 35 and a motor chamber 38. The motor chamber 38 is placed on the base 31, and the cleaning tank 35 is fixed to the upper opening thereof. A disc-shaped cleaning tank disk 37 is provided in the cleaning tank 35. The cleaning tank disk 37 has a large number of round holes 37a for removing foreign substances. A cleaned medal discharge port 35a having a thickness and a width through which medals can pass is provided from a surface that coincides with the upper surface of the cleaning tank disk 37 on the peripheral wall portion of the cleaning tank 35 to the upper side thereof. During operation, the cleaning tank 35 is covered with a lid (not shown), and is provided with a water level sensor and other various sensors (not shown) on the outer periphery.

  To-be-cleaned medals are supplied to the cleaning tank 35 from a medal supply means (not shown) such as a hopper. The medals transported into the cleaning tank 35 are cleaned with cleaning water by the rotation of the cleaning tank disk 37. Is done. Sequentially, medals are discharged from a cleaned medal discharge port 35a provided in the inner peripheral portion of the cleaning tank 35, and can be supplied to a water absorption means (roller cassette) 1 described later. On the downstream side in the movement direction of the medal with respect to the cleaning tank 35 (the right side in FIG. 1), that is, outside the outlet of the cleaned medal discharge port 35a, a roller cassette storage portion (hereinafter referred to as “ 39) is provided. The storage unit 39 is located downstream in the movement direction of the medals with respect to the cleaning tank 35 (right side in the drawing), that is, outside the outlet of the cleaned medal discharge port 35a. Two sets of roller cassettes 1 and 1, which will be described later, are mounted on the storage unit 39. A guide (not shown) for correctly mounting the two sets of roller cassettes 1 and 1 is provided inside the storage unit 39. When each roller cassette 1 is correctly mounted, a roller detection sensor (not shown) is provided. ) Works to display a lamp to that effect.

  A water absorption processed medal discharge unit 40 is provided on the downstream side (right side of the drawing) of the storage unit 39. The outlet of the water absorption processed medal discharge section 40 is directed downward, and a medal recovery wagon (not shown) can be disposed below the outlet. Further, although not shown, a control panel including a terminal is provided on the front portion (front side of FIG. 1) of the cleaning machine main body 33, and the control panel is usually protected by covering the terminal cover 51 with the control panel. (See FIGS. 1 and 3).

  Below the cleaning tank 35 is a motor chamber 38, in which a vertical disk drive motor (not shown) is installed, and the upper end 37 b of the vertical drive shaft is at the center of the cleaning tank disk 37. It is fixed. As shown in FIG. 2, a purified water tank 41 is provided in the base 31 located below the motor chamber 38 (cleaning machine main body 33). The purified water tank 41 is a rectangular container-like water tank, and a partition plate 43 is provided at a substantially central portion with respect to the flow direction of the washing water so as to be detachable through the partition plate guide 41a at a right angle to the flow direction. is there. This partition plate 43 is provided with a number of circular through holes 43a,. The partition plate 43 is provided with a filter insertion portion 43b having a rectangular cut-out hole that is slightly narrower than the partition plate and penetrates from the upper side to the lower side inside the upper side, and this is mixed in the cleaning water. A filter 45 for blocking foreign matter is detachably attached. The filter 45 is periodically replaced to maintain the cleaning water purification quality and the smooth flow of the cleaning water. The purified water tank 41 is provided with a water level level gauge (not shown) so that the amount of washing water is always measured and replenished as needed when the water level does not reach a specified level. Since the washing water decreases due to evaporation or the like, regular replenishment is necessary.

  One end of a reflux tube 47 for reusing the purified cleaning water is connected to the downstream end of the purified water tank 41 (left side in FIG. 2). The reflux tube 47 passes through a cover 49 that covers the purified water tank 41 and is exposed to the outside of the cover 49. The reflux tube 47 extends through the coupler 47a,..., The elbow 47b, and the pipe joint 47c, and finally the other end is cleaned. It is connected to an end pipe joint 47 d provided on the horizontal wall surface of the tank 35. A pump (not shown) that sucks up the cleaning water is provided at an intermediate position in the conduit of the reflux tube 47 so that the cleaning water can be supplied to the cleaning tank 35.

  Next, a roller cassette as a water absorption means and a water absorption roller constituting the roller cassette will be described. As shown in FIGS. 2 and 3, the roller cassette 1 comprises a cassette frame 1a, 1a with a pair of water absorbing rollers 3, 3 set. Gears 4, 4 for driving each water absorption roller 3 are provided at one end of each water absorption roller 3 located outside the cassette frame 1 a on the one end side. The cassette frame 1a is configured such that a pair of roller support plates are fixed at predetermined intervals by a beam member (not shown) and can be stored in the storage unit 39. A water absorption roller drive motor (not shown) is provided below the storage portion 39, and the gears 4 and 4 are in mesh with the drive gears of the motor.

  As shown in FIGS. 4 and 5, the water absorbing roller 3 is composed of a cylindrical core member 5 made of a synthetic resin material and an elastic water absorbing layer 7 wound around the outer periphery of the core member 5. The elastic water-absorbing layer 7 is made of a sponge (sponge) shaped into a cylindrical shape and wound around the outer periphery of a cylindrical member 5 b that forms the outer layer of the core member 5. The elastic water-absorbing layer 7 is not limited to the above-described sponge as long as it has water absorption and elasticity, and may be other substances. The core member 5 and the elastic water-absorbing layer 7 are fixed to each other so as not to idle, and the portions where both ends of the core member 5 are not provided with the elastic water-absorbing layer 7 are journal portions that fit into the bearing portions of the cassette frame 1a. The gear 4 can be attached to one end (see FIGS. 1 to 3).

  As shown in FIGS. 5 and 7, the core member 5 includes a tubular support shaft member 5a that can be rotatably supported by the cassette frame 1a at both ends, and a cylindrical member that holds the elastic water absorbing layer 7 between the cassette frames 1a and 1a. 5b. The cylindrical member 5b is fitted in a close contact state with the outer periphery of the support shaft member 5a, and can always rotate integrally. As shown in FIG. 5 (a), if an inner peripheral member 5 c that can be easily attached to and detached from the core member 5 is provided on the inner peripheral portion of the elastic water-absorbing layer 7, It is effective in reducing the manufacturing cost of the roller.

  In a range where the elastic water absorption layer 7 is inserted in the core member 5, a large number of through holes 5 e,... That communicate the elastic water absorption layer 7 and the hollow portion 5 d of the core member 5 are formed. The through hole 5e penetrates the support shaft member 5a and the cylindrical member 5b at the shortest distance (see FIG. 6A). In FIG. 5, the shape of the through hole 5e is rectangular, but the shape of the through hole may be other shapes such as a circle, an ellipse, and a square. As shown in FIG. 4, these through-holes 5e,... Allow moisture contained in the elastic water-absorbing layer 7 to enter the cavity 5d of the core member 5 and drop it from the opening of the cavity 5d. Can be removed.

  As shown in FIG. 6A, the core member 5 has a cylindrical shape, and the hollow portion 5d surrounded by the peripheral wall of the core member 5 has a horizontal position at the lowest position serving as a moisture flow path. . The through hole 5e is provided so as to penetrate both the support shaft member 5a and the cylindrical member 5b.

  FIG. 6B shows that the central axis C of the hollow portion 5d1 coincides with or substantially coincides with the central axis of the core member 5, and the peripheral wall surrounding the hollow portion 5d1 is different from the inner diameter of one end of the core member 5. A taper that increases the inner diameter of the end is shown. This is employed as means for facilitating the outflow of moisture by inclining the water channel. The water pushed out from the elastic water-absorbing layer 7 into the cavity through each of the through holes 5e,... Depends on the gravity acting on the water rather than the centrifugal force generated by the rotation, depending on the rotational speed of the water-absorbing roller 3. Since it is generally larger, most of the water flows through the rotating peripheral wall and collects at its lower end. The collected water closes the through-hole 5e, and in some cases, it may be reversed by centrifugal force. This may interfere with new moisture extrusion, so we want to remove it from the cavity as soon as possible. It is this taper that is responsible for the promotion of such moisture removal, and the moisture outflow is efficiently performed by the downward slope of the peripheral wall in the direction of moisture outflow. If the moisture outflow is performed efficiently, each through-hole is in a state where it can easily accept moisture, thereby further improving the moisture absorption efficiency.

  FIG. 6C shows that the central axis C of the hollow portion 5d2 coincides with or substantially coincides with the central axis of the core member 5, and the peripheral wall surrounding the hollow portion 5d2 is larger than the inner diameter of the central portion of the core member 5. A taper that increases the inner diameter of both ends of the core member 5 is shown. This is the same as described above for facilitating the outflow of water by inclining the water channel, but has been adopted as a means for further improving drainage efficiency. In other words, as shown in the drawing, if the taper portion 5d2 is formed with two tapers having a minimum inner diameter in the longitudinal direction and the maximum inner diameters at the opening ends on both sides, the taper is greater than that in FIG. The angle can be increased. Moreover, since the distance from the center part of the hollow part 5d2 to the opening end part is shortened to half of the entire length, the length of the flow path is correspondingly shortened, so that high-speed outflow is possible.

  FIG. 6D shows an improvement in the efficiency of moisture removal by providing at least one spiral groove 5g for drainage promotion on the peripheral wall of the cavity 5d3 so that the lead extends in the length direction. is there. As described above, it is highly resistant that the water that has entered from each through hole 5e flows over the openings of each through hole disposed in the cavity, and in some cases, the water is elastic from the through hole by centrifugal force. It may also flow backward toward the water absorption layer 7. Therefore, a spiral groove portion 5g is provided on the peripheral wall of the cavity portion 5d3, and the outflow of moisture is further promoted along the spiral groove portion 5g. The spiral groove portion can flow out such that the water collected in the spiral groove portion is pushed out by the centrifugal force generated by the rotation of the water absorption roller and the spiral motion. Therefore, it is desirable that the lead of the spiral groove 5g and the direction thereof differ depending on the rotation direction and the rotation speed of the water absorbing roller 3. It is desirable that the spiral groove portion 5g is provided with a plurality of strips so that the moisture that has entered the hollow portion 5d3 can be easily guided to the spiral groove portion 5g located immediately nearby. If the rotational speed of the water absorbing roller 3 and the lead angle of the spiral groove 5g are adjusted so that the component force of the centrifugal force works well along the spiral groove 5g, moisture easily flows out along the spiral groove 5g. Since the collected moisture can be pushed out efficiently, the drainage effect can be further enhanced.

  If the spiral groove 5g is provided on a tapered peripheral wall as shown in FIGS. 5B and 5C, the drainage effect can be further enhanced by the synergistic effect of the taper and the spiral groove. Further, as described above, the water that has entered from the through holes 5e flows over the openings of the through holes 5e,. On the contrary, a force directed toward the elastic water-absorbing layer 7 acts due to centrifugal force or the like, so that resistance to the flow is increased. Therefore, it is desirable that the spiral groove portion 5g is not overlapped with the through hole 5e as much as possible, and a means for facilitating the outflow of water collected in the spiral groove portion is desirable. As this means, for example, there is no provision for a through hole in a range overlapping with the spiral groove portion 5g, and the moisture that has entered the spiral groove portion 5g can be reliably discharged from the opening end. It is good to do. In addition, illustration of the through-hole in FIG.6 (b), (c) and (d) is abbreviate | omitted.

  By adopting these water absorption rollers 3, as shown in FIG. 7, when the cleaned medal M sent out from the cleaning tank 35 (see FIGS. 1 to 3) passes through the roller cassette 1, the elastic water absorption layer 7. Is pressed by the medal M, the water adhering to the surface is transferred to the elastic water absorption layer 7 and removed. At this time, the pressed portion of the elastic water-absorbing layer 7 by the medal M and its periphery are elastically deformed, and the water in the deformed range is excluded, so that much of the excluded water is directed toward the center of the elastic water-absorbing layer 7. Will move. At this time, as shown in FIG. 4, the excluded water enters the hollow portion 5d of the core member 5 through a large number of through holes 5e. And as shown in FIG. 7, the water | moisture content collected in the cavity 5d becomes the water droplet W, and is dripped from the opening edge part of the cavity 5d of a core member. For this reason, the pressed portion of the elastic water-absorbing layer 7 and the water around it move toward the central portion of the elastic water-absorbing layer 7, so that the above-mentioned pressed portion and its surrounding water are reduced, and the medal M The function of the moisture removing action is improved.

  Returning to the explanation of the medal washing machine main body again. As shown in FIG. 2, a pair of dewatering rollers 53 and 53 are provided directly below the storage portion 39 so as to be parallel to and below the respective water absorbing rollers 3 and 3 so as to be in contact with the water absorbing rollers 3 and 3. . Each dewatering roller 53 is for pressing the lower part of the water-absorbing roller 3 located below to remove water from the water-absorbing roller 3. These dewatering rollers 53, 53 are made of a relatively hard material that hardly undergoes elastic deformation by contact with the water absorption roller 3, and a gear is provided at the end that is not visible in the drawing, like the water absorption roller 3. It is provided. These gears are engaged with each other, and one of the gears is engaged with the gear of the drive motor for the water-absorbing roller 3 via an intermediate gear. The dewatering rollers 53 and 53 are configured to rotate in the opposite direction to the water absorbing roller 3 of the other party in contact with the dewatering rollers 53 and 53 so that the water in the water absorbing roller 3 can be squeezed by always pressing the contact portion with the water absorbing roller 3. is there. Below the dewatering rollers 53, 53, a tray portion 55 that receives and temporarily stores water dropped from the surfaces of the water absorbing rollers 3, 3 by these dewatering rollers and water dropped from the hollow portion 5 d of the core member 5. Is provided. The tray 55 is formed in a container shape by raising the periphery so that it can be received without spilling all the water falling from the roller cassette 1.

  One end of a drain pipe 57 is attached to the bottom 55 a of the tray 55. The connection portion of the drain pipe 57 with the tray portion 55 has an upper end slightly higher than the bottom surface of the bottom portion 55a, and when the amount of water accumulated in the tray portion 55 exceeds a predetermined amount, the upper end of the drain tube 57 that protrudes. It is possible to get over the section and into the drain pipe. The other end of the drain pipe 57 is positioned in the purified water tank 41 described above, and the waste water from the roller cassette 1 can be collected in the purified water tank 41 and reused.

  The medal washing machine shown in FIGS. 1 and 2 shows only the main body. Actually, the washing tub 35 and the storage unit 39 are covered with a lid, and below the water absorption treated medal discharge unit 40. There is a medal recovery wagon to be located. The supply of the medal M to the cleaning tank 35 is performed by a medal supply means for collecting medals from a medal hopper, which is a separate device from the medal cleaning machine.

  Next, the operation of the above-described medal washing machine will be briefly described. In FIG. 2, when the medal washing machine is started, washing water is supplied from the purified water tank 41 to the washing tank 35 via the reflux tube 47, and used medals are sent to the washing tank 35 from a hopper (not shown). . The medals are stirred together with the cleaning water in the cleaning tank 35, sequentially move toward the cleaned medal discharge port 35a, and are eventually discharged from the cleaned medal discharge port 35a. The amount of cleaning water in the cleaning tank 35 and the amount of medals are detected by sensors, respectively, and appropriate amounts are secured. The medals coming out of the cleaning tank 35 from the cleaned medal discharge port 35a are sent to the two sets of roller cassettes 1 and 1 through a passage (not shown). The medals from which moisture has been removed by these roller cassettes 1 fall when they are taken out from the water absorption processed medal discharge unit 40 and are collected in a medal collection wagon (not shown) waiting below.

  While the medals are collected, when the medals M pass through the roller cassettes 1 and 1 with the washing water wet, the water wiped off by the elastic water absorbing layer 7 is transferred to the elastic water absorbing layer 7. Further, it moves from the surface of the elastic water-absorbing layer 7 toward the central portion of the water-absorbing roller 3 and enters the hollow portion 5d from the through-holes 5e arranged in the core member 5 (see FIG. 4). Moisture that has entered the hollow portion 5d flows out of the opening end and drops onto the tray 55. For the case where the peripheral wall of the hollow portion 5d is tapered (FIGS. 6B and 6C) and the peripheral wall is provided with the spiral groove 5g (see FIG. 6D), the drainage described above A promoting action is performed. Further, the moisture remaining in the vicinity of the outer peripheral portion of the elastic water-absorbing layer 7 is transferred between the rollers by the contact between the elastic water-absorbing layers 7 and 7 or by the contact with the dewatering rollers 53 and 53. In the same manner, it is dropped on the tray part 55. When the amount of water dripped onto the tray part 55 reaches a predetermined amount or more, it is collected from the drain pipe 57 into the purified water tank 41. The water recovered in the purified water tank 41 passes through the filter 45 provided on the partition plate 43 and moves to the downstream side of the water tank. When passing through the filter 45, foreign matters such as dust mixed in the cleaning water are blocked from passing by the filter. Since the washing water decreases due to evaporation or the like, the water level is detected by a level gauge or the like so that excess or deficiency does not occur. It is necessary to replace the cleaning water and the filter 45 periodically to maintain the cleaning power.

  As described above, the present invention relates to a medal washing machine. However, the water absorption roller, which is a main part of the present invention, can be applied to all models using the water absorption roller among the types of the medal washing machine. Further, this water absorption roller can be a transaction object even if it is a single unit or incorporated in a roller cassette.

  The present invention relates to a processing device called a medal washing machine and a manufactured product called a water absorption roller, both of which are industrial products and can be used industrially.

It is a perspective view showing the whole medal washing machine composition as an example. It is a perspective view of a partially cutout. It is a disassembled perspective view of a washing machine main body. It is explanatory drawing which shows the cross section of a water absorption roller, and the movement state of a water | moisture content. The structure of a water absorption roller is shown, (a) is a partially cutaway perspective view showing an elastic water absorption layer provided with a core member, and (b) is a partially cutaway perspective view showing what is not provided with a core member. It is. The structure of a core member is shown, (a) is sectional drawing which shows the basic composition of the water absorption roller which concerns on this invention, (b) is sectional drawing which shows what made the whole cavity part taper in one direction (C) is sectional drawing which shows what was made into the taper of the both directions which makes an internal diameter large toward the both ends from the center of a cavity part, (d) is a cross section which shows the example which provided the spiral groove part in the internal peripheral surface of a cavity part FIG. It is explanatory drawing which shows the state in which a water | moisture content dripped from the opening end of a cavity part when a medal passes a roller cassette. It is explanatory drawing for demonstrating the water absorption means in a prior art, (a) is a perspective view, (b) is sectional drawing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Roller cassette 1a Cassette frame 3 Water absorption roller 4 Gear 5 Core member 5a Support shaft member 5b Cylindrical member 5c Inner peripheral member 5d Hollow part 5e Through-hole 5g Groove part 7 Elastic water absorption layer 31 Base 33 Washing machine main body 35 Washing tank 35a Washed medal Discharge port 37 Cleaning tank disk 37a Foreign matter removing round hole 37b Upper end portion 38 Motor chamber 39 Roller cassette storage portion 40 Water absorption treated medal discharge portion 41 Purified water tank 41a Plate guide 43 Partition plate 43a Circular through hole 43b Filter insertion portion 45 Filter 47 Reflux tube 47a Coupler 47b Elbow 47c Pipe joint 47d End pipe joint 49 Cover 51 Terminal cover 53 Dewatering roller 55 Dish part 55a Bottom part 57 Drain pipe 91 Drying roller 93 Cassette 95 Central core part 97 Material D Drying means M Meda W water droplets

Claims (4)

A washing tank for washing medals;
Water-absorbing means for sucking water adhering to the medal discharged from the washing tank;
A purified water tank for recovering and purifying water discharged from the water absorption means;
A medal washer having a reflux tube for supplying the cleaning water purified in the cleaning water tank to the cleaning tank;
The water absorbing means includes at least one pair of water absorbing rollers provided so as to be in contact with each other or to be a gap thinner than the thickness of one medal,
Each of the water absorption rollers includes a cylindrical core member having a hollow portion that is open at one end or open at both ends, and an elastic water absorption layer having a predetermined thickness formed on the outer periphery of the core member,
The medal washing machine, wherein the core member is formed with a plurality of through holes that communicate the cavity and the elastic water absorption layer. The central axis of the hollow portion coincides with or substantially coincides with the central axis of the core member,
The peripheral wall surrounding the hollow portion is a taper that makes the inner diameter of the other end of the core member larger than the inner diameter of one end of the core member, or a taper that makes the inner diameter of both ends of the core member larger than the inner diameter of the central portion of the core member. The medal washing machine according to claim 1, wherein the medal washing machine is formed. The medal washing machine according to claim 1 or 2, wherein the water absorbing roller is provided with at least one spiral groove portion for promoting drainage in the length direction on the peripheral wall. A water absorption roller usable in the medal washing machine according to any one of claims 1 to 3.

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