JP3369354B2 - Conveyor belt cleaning equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conveyor belt cleaning apparatus. 2. Description of the Related Art Conventionally, a spiral conveyor in which an endless belt is wound around an outer peripheral surface of a rotatable vertical driving drum and the belt is circulated and run is known. It is known (for example, see JP-A-5-27).
0636). This spiral conveyor is used mainly for the purpose of reducing the occupied space, for example, when it is necessary to maintain a conveyed object in a long-time conveying state, for example, when processing food such as freezing, drying, heating, etc. It is used. In such a spiral conveyor, the balance between the speed ratio of the rotation of the drive drum and the belt and the balance of tension are delicate, and it is not good to increase the tension carelessly. However, the installation tension of the belt body tends to be high due to the long installation distance of the belt body. By the way, in this spiral conveyor, since a conveyed product may be food as described above, a belt cleaning device is provided in a part of the conveying path in order to keep the conveying surface clean. In this belt cleaning device, as shown in FIG. 8, the belt body B is bent and guided in a V-shape by a plurality of guide rollers R, and this portion is immersed and passed into a cleaning tank T in which a cleaning liquid L is stored. It was that. [0004] In the conventional belt cleaning device, it is necessary to bend the belt body B into a V-shape, so that the tension load is increased in this portion. Moreover, even when it is not necessary to clean the belt body B (when the inside of the cleaning tank T is emptied), the belt body B is always folded in a V-shape, and the above-mentioned tension load is constantly maintained. However, as described above, in this type of spiral conveyor, since the tension of the belt body B is originally high, the application of the tension load by the belt cleaning device may cause the bearings such as the guide roller R to wear out early. It was never a good thing. In particular, the belt body B employs a bend permitting structure for winding around the drive drum, but this structure also has a disadvantage that abrasion easily occurs. That is, for these reasons, it has been indispensable that the maintenance of the conveyor becomes more frequent, the durability is reduced, and the running cost is increased. The present invention has been made in view of the above circumstances, and has been made to reduce the frequency of maintenance and improve the durability of a conveyor so as to prevent the installation tension from being adversely affected in cleaning the belt body. It is an object of the present invention to provide a conveyor belt cleaning device capable of reducing the running cost. In the present invention, the following technical means have been taken in order to achieve the above object. That is, the present invention provides a cleaning tank provided on a straight portion of the belt body,
Has a cleaning liquid supply section capable of supplying a cleaning liquid to the cleaning tank, have been made possible storing cleaning liquid to the cleaning tank surrounds the periphery of the belt member to pass through the inside of the tank, this
Cleaning liquid to recover the cleaning liquid overflowing from the cleaning tank
A collection unit is provided, and a draining room is provided,
Rinse water into the belt body forward of the cleaning tank in the belt body transport direction.
A washing nozzle for spraying water is provided.
The rinse water to the drain chamber and the flush nozzle
Switch to a state where rinse water from the tank flows to the washing liquid recovery section
A flexible water flow switching plate is provided . The cleaning liquid supplied by the cleaning liquid supply unit is provided inside a cleaning tank provided at a straight portion of the belt body.
The belt body surrounds the periphery of the belt body that passes straight in the tank (that is, the belt body can be submerged). That is, since the belt body is washed without being folded in a V-shape or the like, there is no possibility that the tension acting on the belt body may adversely affect the entire conveyor. An embodiment of the present invention will be described below with reference to the drawings. 1 to 6 show a spiral conveyor 1 according to the present invention.
Of the spiral conveyor 1 is shown.
Is a cylindrical drive drum 2 rotatable as shown in FIG.
On the other hand, the endless belt body 3 is circulated around the drum through the upper carry-out path 5 and the lower carry-in path 6, centering on a path (winding path 4) spirally wound upward from below. (Note that the winding pitch of the winding path 4 is roughly drawn in FIG. 2, but actually, as shown in FIG. 3, a fine pitch (the number of windings of the belt body 3 is large). Then, a belt cleaning device 7 is provided in the lower carry-in path 6. First, a basic configuration of the spiral conveyor 1 will be described, for example, as shown in FIG. Between the parallel link chains 8 and 9, a net 10 having an allowance for expansion and contraction is stretched along the longitudinal direction, and the link connecting portions of the link chains 8 and 9 are
By being held movably along its longitudinal direction, it can be bent (that is, wound around the drive drum 2 or meandered) in the width direction as a whole. The drive drum 2 is driven to rotate by a main drive motor 14 provided below the drive drum 2. That is, an inner gear 15 is provided below the drive drum 2, and a pinion 16 meshing with the inner gear 15 is rotated by a main drive motor 14 via a speed reducer 17. Reference numeral 18 denotes a guide band for guiding the winding of the belt body 3 around the driving drum 2, and includes a guide rail 19 on the inner peripheral side and a guide rail 20 on the outer peripheral side as shown in FIG. Have. Either guide rail 19, 20
Are also formed of a resin material having a relatively small friction coefficient. In FIG. 4, both guide rails 19 and 20 are depicted as being provided on the support bar 21, but the support bar 21 is provided with a basket-shaped cage provided to surround the outer peripheral portion of the drive drum 2. Are provided at predetermined intervals in the circumferential direction of the side frame 22 (that is, along the radial direction from the rotation center of the drive drum 2). Also,
There is also a support bar that supports only the outer side guide rail 20 (see the left half of FIG. 3). On the other hand, in the winding path 4, the belt body 3 has one end in the width direction abutting on the outer peripheral surface of the driving drum 2,
Of the route guiding wheels (including rollers and sprockets) 23 of the upper carrying-out path 5 and the lower carrying-out path 6, while receiving the rotational force of the driving drum 2,
A sub-drive motor 25 provided on a wheel 24 disposed in place (in this embodiment, on the exit side of the upper carry-out path 5)
Thus, the feed driving can be performed. An induction motor is used as the sub drive motor 25. Therefore, for example, the rotation of the drive drum 2 by the main drive motor 14 and the belt body 3 by the sub drive motor 25
If the balance with the feed is lost and excessive tension is generated in the belt body 3, the rotation speed of the sub-drive motor 25 is automatically reduced in proportion to the considerable amount. Conversely, when the tension acting on the belt body 3 becomes light, the rotation speed of the sub-drive motor 25 automatically increases in proportion to the corresponding amount. The initial rotational speeds of the main drive motor 14 and the sub drive motor 25 are set in a predetermined relationship by inverter control. After the belt body 3 descends through the upper carry-out path 5, it is guided toward the lower carry-in path 6.
At the lower part of the drum around the drum. However, the passing direction in this case is opposite to the rotation direction of the driving drum 2. Therefore, in the related art, the belt body 3 descended through the upper carry-out path 5 is wound around a wheel 23 (see an arrow X) disposed below the drive drum 2 in a folded manner, and thereafter, is bothersomely indicated by a two-dot chain line. As shown in the drawing, the drive drum 2 is made to make a complete round along the rotation direction, is wound around again by another wheel 23 (see arrow Y), and is then directed to the lower carrying path 6. On the other hand, in the present invention, as shown in FIGS. 3 and 4, the drive drum 2 is held at its lower part by a rotation guide path body 26, and the rotation guide path body 26 holds the belt body 3. It is made to guide. The rotation guide path body 26 includes a rotation ring 27 rotatably held at a lower portion of the drive drum 2 along substantially the same track as the outer peripheral surface thereof,
A ring rail 28 fixedly held at a predetermined interval on the outer peripheral side of the rotating ring 27 is provided. The rotating ring 27 includes guide rollers 34 and 3 held at the lower end of the driving drum 2 via a bracket 30 and a support ring 31.
5 enables stable rotation so that there is no backlash in the radial and vertical directions. The ring rail 28 is formed of a resin material having a relatively small coefficient of friction, and is attached via a bracket 37 from the side frame 22 or the like surrounding the outer portion of the drive drum 2. With the rotation guide path body 26, the belt body 3 traveling from the upper carry-out path 5 to the lower carry-in path 6 is not restricted in the rotation direction of the drive drum 2 and is not restricted in FIG. Can be passed through the short-circuited curved path Z as shown in FIG. Next, the belt cleaning device 7 will be described. The belt cleaning device 7 is provided at a portion where the belt body 3 is linearly installed (in this embodiment, the primary side of the lower carrying path 6). The belt cleaning device 7 has a cleaning tank 40 and a cleaning liquid supply unit 41 as shown in FIG. Further, a cleaning liquid recovery unit 4 is provided at a lower portion of the cleaning tank 40.
2 are provided. The cleaning tank 40 is formed in a thin box shape having an upper opening as shown in FIG. 5, and is capable of storing a cleaning liquid L. The front and rear walls intersect with the conveying direction of the belt body 3. Notches 45 that can pass through the belt body 3 are provided at 40a and 40b.
Is provided. That is, the upper edge level of the cleaning tank 40 is higher than the passing level of the belt body 3. Therefore, when the cleaning liquid L supplied to the tank is maintained in the overflow state, the periphery of the belt body 3 can be surrounded by the cleaning liquid L (that is, the belt body 3 is submerged). The cleaning liquid recovery section 42 is provided inside a large tank body 47 provided so as to surround the cleaning tank 40, and can collect all the cleaning liquid L overflowing from the cleaning tank 40. It has become. In the inside of the tank body 47, a draining chamber 50 partitioned by a partition wall 48 is provided separately from the cleaning liquid collecting section 42. The draining chamber 50 is configured to correspond to the downstream side of the cleaning liquid recovery unit 42 in the transport direction of the belt body 3. A washing nozzle 51 capable of spraying rinsing water onto the belt body 3 from above the belt body 3 is provided above the partition wall 48. This washing nozzle 51 has a structure in which a downward slit or hole (not shown) is formed at a predetermined interval in the pipe axis direction with respect to a pipe (see FIG. 6) installed along the width direction of the belt body 3. It has become. The draining chamber 50 has a belt 3
Drain nozzles 52 and 53 for blowing compressed air from both upper and lower sides toward the belt body 3 are provided. These draining nozzles 52 and 53 are provided with downward or upward slits or holes (not shown in the drawing) at predetermined intervals in the pipe axis direction with respect to a square pipe (see FIG. 6) installed along the width direction of the belt body 3. ) Is formed. Reference numeral 54 in FIG. 6 denotes a blower that supplies compressed air to the draining nozzles 52 and 53. Note that a water flow switching plate 55 is provided at a position below the belt body 3 corresponding to the washing nozzle 51. The water flow switching plate 55 is configured such that the slender plate can swing back and forth (left and right directions in FIG. 1) about a pivot 55a parallel to the width direction of the belt body 3 (in FIG. 1, the water flow switching plate 55 is formed). The state in the neutral position is shown). That is, if the water flow switching plate 55 is swung so that the upper end thereof comes into contact with the washing tank 40, the rinsing water from the washing nozzle 51 can flow into the draining chamber 50. Conversely, by oscillating the water flow switching plate 55 such that the upper end thereof contacts the stopper 56 on the front side, the rinsing water from the washing nozzle 51 can flow to the washing liquid collecting section 42. Therefore, for example, when the cleaning liquid L is hot water or water, and the rinsing water from the rinsing nozzle 51 is also hot water or water, the rinsing water is recovered into the cleaning liquid recovery unit 42, so that the hot water or water is effective. It can be used. When one of the cleaning liquid L and the rinsing water is a detergent, the rinsing water flows to the draining chamber 50 and is separately collected or drained, whereby the cleaning liquid L in the cleaning liquid collecting section 42 is removed. There is an advantage that dilution and contamination can be prevented. The cleaning liquid supply unit 41 is configured to supply the cleaning liquid L to the cleaning tank 40 so that the overflow state is maintained as described above. In the present embodiment, two fountain nozzles 58 and 59 provided toward the upper part and the lower part of the belt body 3 and the cleaning liquid L in the cleaning liquid recovery unit 42 are sucked and the cleaning liquid L is supplied to the fountain nozzle 5.
8, 59 and a pump device 60 (see FIG. 6) for feeding. The fountain nozzles 58, 59 are formed with downward or upward slits or holes (not shown) at predetermined intervals in the pipe axis direction with respect to a pipe extending along the width direction of the belt body 3. It has a structure. Reference numeral 61 denotes a filter for preventing impurities in the cleaning liquid L from being sucked into the pump device 60. Therefore, the cleaning liquid L is supplied to the cleaning liquid recovery unit 4.
From 2, the water is circulated through the pump device 60, the fountain nozzles 58, 59 and the washing tank 40. In the belt cleaning device 7 having such a configuration, the cleaning liquid L from the fountain nozzles 58 and 59 is sprayed on both the upper surface and the lower surface of the belt body 3 that moves linearly in the cleaning tank 40. Then, the dirt on the belt body 3 is removed. Then, rinsing water from the rinsing nozzle 51 is sprayed on the belt body 3 that has come out of the rinsing tank 40 to wash away the cleaning liquid L, and then rinsing water is blown off by the compressed air from the draining nozzles 53 and 54 (substantially). (Dried). It is, of course, possible to move the belt 3 without operating the cleaning liquid supply unit 41 and leaving the cleaning tank 40 empty. FIG. 7 shows a second embodiment of the spiral conveyor 1 according to the present invention. The upper carrying-out path 5 and the lower carrying-in path 6 of the belt body 3 are different from each other in the first embodiment. (In the first embodiment, they are perpendicular to each other, but in the second embodiment, they are parallel to each other), and in that the rotation direction of the drive drum 2 is reversed. Other configurations and operations are substantially the same. The present invention is not limited to the above embodiments. For example, the installation position of the belt cleaning device 7 is not limited to the above embodiment, and may be provided on the secondary side of the lower carry-in path 6, the primary side of the upper carry-out path 5, the secondary side, or the like. In the cleaning liquid supply unit 41,
It is also possible to adopt a configuration in which a tank (not shown) for unused cleaning liquid is independently provided. In this case, the cleaning liquid L collected by the cleaning liquid collecting section 42 may be discarded, and the pump device 60 may not be provided (the pressurized air or the like may be used). . The cleaning liquid supply unit 41 is configured to spray the cleaning liquid L only on the conveying surface of the belt body 3 (corresponding to the lower surface on the lower side in FIG. 1) (ie, only the lower fountain nozzle 59). Provided). In the cleaning liquid supply unit 41, the fountain nozzles 58, 59
(Simply a configuration in which the cleaning liquid L is injected into the cleaning tank 40). The configuration of the conveyor itself is not limited at all, and the configuration of the drive drum 2 (including rotating devices), the configuration of the belt body 3 and the configuration of its holding and its path, as well as the rotation guide path 2
The presence / absence of 6, and its configuration, conveyor use, and the like can be changed as appropriate. According to the present invention, the cleaning liquid provided by the cleaning liquid supply section is provided inside the cleaning tank provided at the linearly erected portion of the belt body, having the above-described structure.
The belt body surrounds the periphery of the belt body that passes straight in the tank (that is, the belt body can be submerged). That is, since the belt body is washed without being folded in a V-shape or the like, there is no possibility that the tension acting on the belt body may adversely affect the entire conveyor. Therefore, the frequency of maintenance as a conveyor can be reduced, the durability can be improved, and the running cost can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side sectional view showing a belt cleaning device according to the present invention. FIG. 2 is a schematic view showing a first embodiment of a spiral conveyor provided with a belt cleaning device according to the present invention. FIG. 3 is a partially crushed side view showing a rotation mechanism of a drive drum. FIG. 4 is a detailed view of a portion A in FIG. 3; FIG. 5 is a perspective view showing a cleaning tank of the belt cleaning device. FIG. 6 is a plan view showing a belt cleaning device. FIG. 7 is a schematic diagram showing a second embodiment of the spiral conveyor provided with the belt cleaning device according to the present invention. FIG. 8 is a side sectional view showing a conventional belt cleaning device. [Description of Signs] 1 Spiral conveyor 2 Drive drum 3 Belt body 7 Belt cleaning device 40 Cleaning tank 41 Cleaning liquid supply unit 42 Cleaning liquid recovery unit L Cleaning liquid

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B65G 45/22 B08B 3/00-3/14

Claims (1)

(1) A cleaning tank (40) provided on a straight portion of a belt body (3), and a cleaning liquid capable of supplying a cleaning liquid (L) into the cleaning tank (40). And a supply section (41). The cleaning tank (40) is capable of storing a cleaning liquid (L) so as to surround a belt body (3) passing through the tank. Overflow from (40)
The washing liquid collecting section (42) for collecting the washed washing liquid (L)
And a draining room (50) is provided,
A belt body is provided forward of the cleaning tank (40) in the belt body transport direction.
(3) A washing nozzle (51) for spraying rinse water is installed.
The rinse water from the washing nozzle (51) is
The state of draining to the draining room (50) and the flush nozzle (51)
The state in which the rinse water is flowed to the washing liquid collecting section (42).
A belt cleaning device for a conveyor, characterized in that a water flow switching plate (55) that can be switched is provided on the belt.