JPH0541390B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an apparatus for polishing the upper edge surface of a plastic box for accommodating beer bottles, cider bottles, etc.

(Prior Art) For example, beer bottles are shipped and collected while being housed in a plastic box P (hereinafter referred to as a P box) as shown in Figure 1A. As shown in Figure B, the upper edge surface Pa of the lower P box receives the load of the upper P box.
It is easy to get scratched, and moreover, dirt and the like can adhere to the scratches, spoiling its aesthetic appearance and making it impossible to reuse it. Conventionally, hot water was sprayed from a cleaning device onto the top edge surface Pa of the dirty P box as described above to clean it, but depending on the nature of the scratches and the degree of adhesion of dust, cleaning alone may not be enough. The drawback was that dirt could not be removed.

(Purpose) This invention eliminates the drawbacks of the above-mentioned conventional methods, and is installed in place of or before the cleaning process to polish the upper edge surface of the P box and remove dirt on the upper edge surface. The purpose of the present invention is to provide a polishing device that is capable of polishing.

(Structure) In order to achieve the above object, the present invention involves transporting a plastic box for transport which is open at the top and placed upside down so that its upper edge surface faces downward. A pair of chain conveyors are arranged horizontally at a predetermined interval, locking protrusions for locking the boxes are provided on opposing upper surfaces of the chain conveyors, and the boxes are transported to an outer position below the chain conveyors. A pair of polishing brush rollers that are in close contact with the upper edge surface of the direction are provided so as to rotate in the opposite direction to the moving direction of the chain conveyor, and the box holding brush rollers are placed above the chain conveyor facing the brush rollers. A plurality of metal rings are provided facing the transport direction of the box and partially overlapping each other, and an arc-shaped holding member is provided that engages and holds the upper inner peripheral surface of these rings, When the upper edge surface of a box being sent on a chain conveyor is polished by a brush roller, the ring moves upward by the conveying force of the box while being guided by the holding member, and also holds the box under its own weight. It is characterized by being twisted so that it can be pressed down.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a schematic plan view showing the overall configuration of the embodiment, in which 1 is a first polishing device for the upper edge surface in the transverse direction of the P box, 2 is a first direction changing device, and 33 is the top polishing device for the upper edge surface in the longitudinal direction of the P box. A second polishing device for the edge surface, 4 is a second direction changing device.

As shown in FIGS. 3 to 5, the first polishing device 1 has rotary shafts 12 and 13 supported at both ends of a machine frame 11. A pair of sprockets 14, 14a and 15, 15a are provided on the rotating shafts 12, 13 at predetermined intervals.
are installed, and the sprockets 14, 15 and 14
Endless chain conveyors 16 and 16a, which carry P boxes and transport them thereon, are stretched between a and 15a so as to be movable in the direction of the arrow. Chain conveyor 16,1
As shown in FIGS. 5 and 6, locking protrusions 18, 18a are welded and fixed at predetermined intervals on the opposing upper surfaces of P 6a. Trailing edge of the box (solid line in Figure 6)
Alternatively, the front edge of the P box (indicated by the chain line in Figure 6) is locked. 20, 20a are the chain receivers of the upper chain conveyor, and 21, 21a are the chain receivers of the lower chain conveyor, 23, 23a.
There is a support piece 2 on the outside of the chain receiver 20, 20a.
This is a pair of guide rails arranged horizontally via 4 and 24a.

A drive motor 26 is installed at the end of the machine frame 11 on the rotating shaft 13 side via a support stand 25.
An endless chain 30 is stretched between a sprocket 27 mounted on the rotating shaft 6 and a sprocket 28 mounted on the end of the rotating shaft 13. Thereby, when the motor 26 is driven, the chain conveyors 16, 16a are moved via the chain 30.

Further, in the longitudinal center of the machine frame 11, there is a rectangular frame 3 which is open in the front and back directions as shown in FIG.
2, 32a connects its upper surface to the chain conveyor 1.
6 and 16a, and a plurality of vertical guide pins 33 and 33a are erected at predetermined intervals within the frames 32 and 32a. As shown in FIG. 7, between two adjacent guide pins are upper plates 34, 34a and a lower plate 35.
Block bodies 37, 37a configured to sandwich pushers 36, 36a inserted into guide pins 33, 33a are arranged between the block bodies 37, 35a so as to be movable up and down. 35
The upper ends of handle shafts 39, 39a having operating handles 38, 38a are fixed to a. The handle shafts 39, 39a protrude downwardly from the frames 32, 32a, and have threads 40, 40a on their outer peripheries, and these male threads are screwed into nuts 41, 41a fixed to the frames. There is. 42, 42a are lock nuts. Rotating shafts 45, 45a, which are perpendicular to the chain conveyors 16, 16a, are supported on the upper and lower plate surfaces of the block bodies 37, 37a via bearings 46, 46a fixed to the upper and lower plates. , rotating shaft 45,4
Pulleys 47 are attached to the front and rear of 5a, and pulleys 48 are attached to the rear end. Polishing brush rollers 50, 50a are mounted on the pulley 48 so as to be rotatable in a direction opposite to the moving direction of the chain conveyors 16, 16a. Brush rollers 50, 50a
is a base material of 65% cotton and 35% polyester with abrasive silicon carbide adhered to it, and the particle size is #80, #
Five types are used: 100, #120, #180, and #240. On the other hand, tension pulleys 51, 51a and 52 of large and small diameters are provided between each pulley 47, as shown in FIG.
Belts 54, 54a are wound around the belt 52a. As shown in FIG. 5, drive motors 57, 57a are installed on the upper surfaces of the frames 32, 32a via support stands 56, 56a.
Pulleys 58, 58a attached to the rotating shaft of 57a
Endless belts 60, 60a are connected between the
is wrapped around it. As a result, the motor 57,
When driving 57a, belts 60, 60a and 5
Brush rollers 50 and 50a are configured to rotate via rollers 4 and 54a. Motor 57, 57a
is movable in the moving direction of the chain conveyors 16, 16a with respect to the support stands 56, 56a via the handle shaft 61. 62 is tension roller 6
This is a weight that applies tension to the belts 54, 54a via the belts 3, 63a.

On the other hand, above the chain conveyors 16, 16a, there are a plurality of iron rings 65, 65a that press down the P box from above using their own weight so that the P box does not float up during polishing by the brush rollers 50, 50a. The rings 65 and 65a are arranged at regular intervals so as to overlap each other, and are out of phase with each other. That is, above the chain conveyors 16, 16a, as shown in FIG.
6a is arranged horizontally, and two sub-support rods 67, 67a are placed on both sides of the main support rod, and arc-shaped holding pieces 68, 68a are clamped between the two rods to form small gaps 69, 6.
9a, and the holding pieces 68, 6
8a holds the upper inner peripheral surfaces of the rings 65, 65a so that the rings can move upward. The end portions of the holding pieces 68, 68a in the P box carrying example are bent downward. In FIG. 3, 70 is a water spray nozzle for spraying water toward the contact surface (polishing surface) between the brush roller and the upper edge surface of the P box during polishing.

As described above, the second polishing device 3 is for polishing the upper edge surface in the longitudinal direction of the P box. Therefore, chain conveyor,
It has the same structure as the first polishing device 1 except that the widths of the brush roller, guide rail, ring, etc. are narrower than those of the first polishing device 1, so illustrations and detailed explanations will be omitted. .

In addition, the first and second direction change devices 2 and 4 carry P boxes.
This is for rotating 90 degrees to change the conveying direction.
For example, by locking and stopping the front end of one side edge in the conveying direction of the P box conveyed from the first and second polishing devices 1 and 3, the P box can be rotated from the other edge direction by the conveying force. Although it is configured to rotate, such a device may be replaced by various other proposed and known means. Therefore, illustration and detailed explanation of this will be similarly omitted.

Next, the operation of the above embodiment will be explained.

When the drive motors 26 and 57, 57a are driven, the chain conveyors 16, 16a move and the brush rollers 50, 50a rotate.

In this state, when the P box is inverted by a reversing machine (not shown) and transported to the first polishing device 1 with the upper edge surface Pa facing downward, the rear edge or front edge of the P box touches the locking protrusion 18. , 18a and mounted on the chain conveyors 16, 16a. When the conveyance of the P box by the chain conveyor 16, 16a begins, the P box will next come into contact with the iron rings 65, 65a, but since the rings 65, 65a are out of phase as described above, the P box will first come into contact with the steel rings 65, 65a. ring 6
5, and then the ring 65a, and the rings 65, 65a are gradually pushed up. This is the same even when transporting a P' box whose height is lower than that of the P box as shown in FIG. 9, and both P and P' boxes will not come into contact with the ring and stop transporting.

Then, by pushing up the rings 65, 65a of the P box, the rings rotate upward using the front ends of the holding pieces 68, 68a as fulcrums due to the carrying force of the P box, and transfer their own weight to the upward facing bottom of the P box. As if hanging, press the P box from above.

When the rings 65 and 65a begin to hold down the P box, the upper edge surface Pa' of the P box in the short direction touches the brush roller 5.
0 and 50a, and the upper edge surface 4a' is polished by rotation of the brush rollers 50 and 50a. During this polishing, the P box is held down by at least four rings 65, 65a, so that it does not float up. Further, since water from the water spray nozzles 70, 70a is sprayed onto the polishing surface, the upper edge surface of the P box is prevented from melting due to frictional heat caused by polishing. As mentioned above, the upper edge surface 4a' of the P box is attached to the rings 65, 6.
The brush rollers 50 and 50a are sequentially polished to remove dirt while being pressed by the brush rollers 5a.

The P box polished by the first polishing device 1 is then conveyed to the first direction changing device 2, where it is rotated 90 degrees to change the conveying direction, and this time, the upper edge surface Pa'' in the longitudinal direction is oriented in the conveying direction. Then, it is transported to the second polishing device 3, and the second polishing device 3
The upper edge surface Pa'' is polished by the same action.

The P box that has been polished by the second polishing device 3 is then conveyed to the second direction changing device 4, where it is rotated 90 degrees to change the conveying direction, and the top edge surface in the transverse direction is again
The original state is reached where Pa' coincides with the conveyance direction.

The P box whose direction has been changed by the second direction changing device 4 is then conveyed to a cleaning device (not shown), and the polished upper edge surface Pa is cleaned with hot water in the same manner as in the past.

In the above, when the brush rollers 50, 50a are worn out, the following operation is performed. That is, as shown in FIG. 7, the lock nut 42,
42a, turn the handles 38, 38a to move the block bodies 37, 37a to the guide pins 33, 3.
Move it upward along 3a. As a result, the brush rollers 50, 50a provided on the rotating shaft 45 disposed on the block bodies 37, 37a also move upward, and the P
It is held in close contact with the upper edge surface Pa of the box. After that, the lock nuts 42, 42a are tightened.
Since the handles 38 and 38a are attached to the brush rollers 50 and 50a, it is of course possible to perform this operation only at the location of the worn brush roller. In the above, the pulleys 47, 47a also move upward at the same time, and the belts 54, 5
4a, but since the weights 62, 62a descend to absorb the slack, the belts 54, 54a are automatically tensioned even when the above operation is performed. be done. Also,
When the brush rollers 50, 50a with the pulleys 59 are operated as described above, the belts 60, 60a also become slack, but this slack is corrected by moving the motors 57, 57a by operating the handle shaft 61. You can take measures to maintain tension.

(Effects) Since the present invention is as described above, by polishing the upper edge surface of the plastic box to be transported, it is possible to completely remove dirt that could not be removed by conventional cleaning alone. Furthermore, it is possible to flexibly respond to irregularities and distortions on the upper edge surface of the box, achieving a polishing effect in the order of several tens of microns, making it possible to reuse beautiful and high-quality boxes. Furthermore, during the polishing, the floating of the box due to the rotation of the brush roller can be suppressed by the weight of the metal ring, and polishing errors can be completely prevented from occurring. Moreover, the metal ring is guided by the arc-shaped holding member and moves upward by the conveying force of the box, and after the box has passed through this, it moves downward and is attached to the upper inner circumference of the holding member. Because the rings are held by engaging their surfaces, even if boxes of different heights are conveyed randomly and consecutively, there is no need to make any special adjustments. can be pressed continuously and effectively. In addition, since the metal rings partially overlap each other, even when a box with a short length in the transport direction is transported, the box gets stuck between adjacent rings in the transport direction, making it impossible to hold down the box. The box can be held securely without causing any damage. In addition, the structure is simple and easy to manufacture, and the polishing work of the upper edge surface of the case can be done without having to obtain anything, which has the excellent effect of significantly increasing work efficiency.

[Brief explanation of drawings]

Figure 1 shows the plastic box, A is a perspective view B
shows a partially enlarged view. Fig. 2 is an overall schematic plan view showing an embodiment of the present invention, Fig. 3 is a front view of the first polishing device as above, Fig. 4 is a plan view of the same as above, and Fig. 5 is along the line of Fig. 4. A side sectional view, FIG. 6 is an enlarged view for explaining the locking part between the chain conveyor and the box, and FIG. 7 is an enlarged view of the main part, A is a front view and B is a plan view. FIG. 8 is an enlarged view of one of the ring parts, with A showing a front view and B showing a plan view. FIG. 9 is a schematic diagram for explaining the action of the transported box pushing up the ring or the box being pressed down by the ring's own weight. 1...First polishing device, 2...First direction changing device, 3
...Second polishing device, 4...Second direction changing device, 11...
Machine frame, 16, 16a...Chain conveyor, 18,
18a... Locking protrusion, 26... Drive motor, 32,3
2a... Frame-shaped frame, 50, 50a... Brush roller, 57, 57a... Drive motor, 65, 65a...
Iron ring, 68, 68a...holding piece, P...plastic box, Pa...upper edge surface.

Claims (1)

[Claims] 1. A pair of chain conveyors are arranged horizontally at a predetermined interval, and carry a plastic box to be transported, which is open at the top, with its upper edge surface facing downward. Locking protrusions for locking the box are provided on opposing upper surfaces of the conveyor, and a pair of polishing brush rollers that are in close contact with the upper edge surface of the box in the transport direction are provided at a lower outer position of the chain conveyor. , the metal rings for holding the boxes are placed above the chain conveyor facing the brush rollers, and are arranged so as to rotate in the opposite direction to the moving direction of the chain conveyor. A plurality of rings are provided so as to overlap each other, and an arc-shaped holding member is provided to engage and hold the upper inner circumferential surface of these rings, and the ring is arranged so that the upper edge surface of the box sent on the chain conveyor is connected to the brush roller. The top of the plastic box is characterized in that when being polished by the holding member, the plastic box is moved upward by the carrying force of the box while being guided by the holding member, and the box is held down by its own weight. Edge polishing device.