JPH1119020A - Screw transport type dishwasher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a screw-transport type dishwasher that facilitate execution of accurate processing even when a long screw shaft is used for a dish transport means and improves dish washing capability. SOLUTION: A dish transport means comprised of screw shafts 5, 6 that transport dishes S while engaging the outer edge portion F of the dishes S with a spiral recessed portion 9 and holding members 7, 8 that guide the edge portions F of the dishes is installed in a manner of extending it from the dish introduction section to the dish guiding out section via the cleaning section 3, the screw shafts 5, 6 are divided into multiple unit screw shafts 5a, 5h, 5b; 6a, 6h, 6b in the longitudinal direction and connected together detachably.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw-transfer-type dishwasher using a screw shaft as a dish-transfer means, and more particularly to a screw-transfer-type dishwasher that enables efficient continuous dishwashing.

[0002]

2. Description of the Related Art Conventionally, tableware transferring means used in a dishwashing apparatus for cleaning a large amount of tableware generally uses an endlessly laid conveyor. For example, in a dishwashing apparatus described in Japanese Utility Model Publication No. 60-34886, a transfer conveyor for transferring a large number of tableware in an upright position and pressing an upper portion of the tableware in the standing state so that the tableware does not fly. The presser conveyor is opposed to the washing machine, and washing is performed by spraying washing water from upper and lower spray nozzles in the washing section while holding the tableware by the pair of upper and lower conveyors.

[0003]

However, such a conveyor-type tableware transfer means is designed so that both the transfer conveyor and the holding conveyor are endlessly wound between the driving sprocket and the driven sprocket at both ends of the apparatus. Therefore, the only part related to the transfer of tableware is actually the forward path, and the return path does not substantially contribute to the transfer. Therefore, the space occupied by the conveyor part that does not contribute to the transfer increases the size of the entire apparatus. was there. In addition, since it is difficult to secure sufficient space at the bottom of the device due to the space occupied by the conveyor section on the return route, maintenance work such as collecting the remaining food accumulated in the waste collection device provided at the bottom and cleaning the bottom is required. There was a problem that made it difficult.

[0004] Further, when the leftovers removed by the washing water of the injection nozzle fall on the conveyor on the return path while being transported on the conveyor on the outward path, they cannot pass through the conveyor and reach the tableware introduction section without being caught by the conveyor. In addition, there is a problem that the improvement of the cleaning efficiency is hindered. In order to solve the problems of such a conveyor-type dishwashing apparatus, the present inventors do not use a conveyor as a tableware transferring means first, and at least transfer the tableware by engaging a dish edge with a spiral recess. A tableware transfer means comprising a plurality of long support members comprising two screw shafts and at least one holding member for guiding the tableware in contact with the tableware edge has been proposed.

[0005] This screw transfer type dishwashing apparatus is
Since the apparatus does not have a return path as in the case of the conveyor type, the entire apparatus is not increased in size, and the problem of the conveyor type tableware transfer means described above can be solved. However, because dishes are arranged in a line on a set of support members and transported, when trying to wash a large amount of dishes in a short time, the number of rotations of the screw shaft is increased, and the screw is used to secure washing time. It was necessary to increase the length of the shaft.

[0006] However, it is generally difficult to machine a long screw shaft with high precision from the viewpoint of machining, and it is very difficult to finish the spiral recess with uniform accuracy over a long distance. There is a problem that it becomes huge. Also, there is a method of injection molding with plastic, but injection molding a long screw shaft with plastic not only increases the mold cost, it is difficult to remove molding distortion generated in the length direction, In addition, since this molding distortion gradually appears in the process of mounting and using the dishwasher, there is a problem that it is very difficult to realize tableware transfer means using a long screw shaft.

[0007] An object of the present invention is to provide a screw-transfer-type dishwasher capable of facilitating high-precision processing and improving dishwashing ability even when a long screw shaft is used as the dish-transfer means. Is to do.

[0008]

According to the present invention, there is provided a screw-transferable dishwashing apparatus according to the present invention, wherein at least two screw shafts for transferring the tableware by engaging an outer edge portion of the tableware with a spiral recess, and the tableware. A plurality of elongate support members comprising at least one holding member for guiding and contacting the outer edge of the tableware as a tableware transfer means, and extending the tableware transfer means from the tableware introduction section to the tableware discharge section via the washing section. The screw shaft is divided into a plurality of unit screw shafts in the longitudinal direction, and these unit screw shafts are detachably connected.

Further, in the screw-transfer-type dishwashing apparatus of the present invention, the washing section is separated into an upstream rough washing step and a downstream finish washing step with a conveying step interposed therebetween in the above-mentioned structure. The unit screw shaft is arranged so as to correspond to each of the rough cleaning step, the transporting step, and the finish cleaning step.

Further, in the screw-transfer-type dishwasher according to the present invention, the pitch of the spiral concave portion of the unit screw shaft corresponding to the transporting step in the above-described configuration may be changed by changing the spiral of the unit screw shaft corresponding to the rough cleaning step and the finishing step, respectively. The pitch is larger than the pitch of the concave portions.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a dishwasher according to the present invention. 1 and 2
1 shows an example of a dishwashing apparatus according to the present invention. In the dishwashing apparatus 1, a washing unit 3 is provided in the center of the inside, a tableware introduction unit (not shown) is provided on the introduction unit side indicated by reference numeral 2 with the washing unit 3 interposed therebetween, and on the lead-out unit side indicated by reference numeral 4. A tableware lead-out section (not shown) is provided.

The cleaning section 3 is divided into two parts, a rough cleaning step 11 on the upstream side and a finish cleaning step 12 on the downstream side, and a transporting step 13 is disposed therebetween. Rough cleaning step 1
Cleaning nozzles 14 and 15 for injecting cleaning water into upper and lower portions are provided in 1 and the finish cleaning step 12, respectively. The washing section 3 includes two lower screw shafts 5 and 6 and two upper holding members 7 and 8 as tableware transfer means.
A book support member is provided. This tableware transfer means,
It extends from a tableware introduction part (not shown), penetrates the washing part 3 horizontally, and further extends to a tableware lead-out part (not shown).

A spiral concave portion 9 and a convex portion 10 are formed on the two screw shafts 5 and 6, respectively, and the outer peripheral portion F of the tableware S is engaged with the spiral concave portion 9 and the outer edge of the tableware S is formed. Part F
The two holding members 7 and 8 are in contact with and hold the
The tableware S is prevented from tilting due to the collision of the washing water injected from the nozzles 4 and 15. Screw shafts 5, 6 are tableware S
In a state in which the outer edge portion F is engaged with the spiral concave portion 9, by rotating in the same direction, for example, the arrow W direction,
The tableware S is transferred from the introduction part side 2 to the discharge part side 4.

The tableware S conveyed in this manner is roughly washed by the washing water sprayed from the washing nozzle 14 when passing through the rough washing step 11, and then, when passing through the transporting step 13 and finishing washing step 12, Finish cleaning is performed by the cleaning water sprayed from 15. Here, injection nozzle 1
Reference numerals 4 and 15 are provided at positions where the washing water passes through a gap between the support members where the washing water does not directly hit the screw shafts 5 and 6 and the holding members 7 and 8.

The transporting step 13 provided between the rough cleaning step 11 and the finish cleaning step 12 has a length such that the cleaning water sprayed from the spray nozzle 14 in the rough cleaning step 11 does not flow to the finish cleaning step 12. It is set as follows. In the transporting step 13, the tableware S is merely transferred without being washed, so that the transfer speed of the tableware S in this portion is set faster than the transfer speed in the rough cleaning step 11 and the finish cleaning step 12. It is. As described above, by lowering the transfer speed in the cleaning steps 11 and 12 and increasing the transfer speed in the intermediate transfer step 13, the unit cleaning time of the tableware S can be shortened as much as possible, and the cleaning efficiency can be improved.

As described above, in order to increase the transfer speed in the transfer step 13, the pitch Ph of the helical recesses of the screw shafts 5, 6 passing through the area of the transfer step 13 is adjusted to the pitch Pa of the area of the rough cleaning step 11 and the finish Pa. The pitch is set to be larger than the pitch Pb in the region of the cleaning process 12. Rough cleaning step 1
The cleaning efficiency of the tableware S can also be improved by changing the transfer speed ratio between the two positions of 1 and the finish cleaning step 12.

On the other hand, changing the helical pitch in the longitudinal direction of the screw shaft 5 is not only extremely difficult in manufacturing, but also increases the manufacturing cost. In particular, when the required number of screw shafts is manufactured, many screw shafts are not actually used but are stored, and not only a long storage space is required but also the operation efficiency is poor, which is not preferable. Changing the helical pitch of the screw shafts 5 and 6 in a part of the length direction as described above becomes more difficult from the viewpoint of machining as the screw shaft becomes longer. However, in the present invention, the screw shafts 5, 6 are divided into a plurality of unit screw shafts 5a, 5h, 5b; 6a, 6h, 6b in the longitudinal direction, and the plurality of unit screw shafts 5a, 5h, 5b; This is made possible by detachably connecting 6h and 6b. That is, since the individual screw shafts 5a, 5h, 5b; 6a, 6h, 6b constituting the screw shafts 5, 6 are short in length, it is easy to process the spiral with high precision, and these are connected. Then, the desired long screw shafts 5, 6 can be obtained.

FIG. 3 to FIG. 5 show the connecting portion of the screw shaft divided as described above, as a representative example of the screw shaft 5, a connecting portion J connecting the unit screw shafts 5a and 5h.
Is shown.

The connecting portion J between the unit screw shaft 5a having a small helical pitch Pa and the unit screw shaft 5h having a large helical pitch Ph is provided with a convex male portion 22 at the end 21 of the unit screw shaft 5a, and the other unit A concave female part 24 is provided at the end 23 of the screw shaft 5h, and the male part 22 and the female part 2 are provided.
4 and fitted with a set screw 25. The cross-sectional shapes of the male portion 22 and the female portion 24 can be square, triangular, or triangular, which facilitates fitting with each other but does not allow relative rotation, thereby facilitating power transmission between the unit screw shafts 5a and 5h. It has a non-circular shape such as a cross.

In addition, the unit screw shafts 5a and 5h must be manufactured so that the two spiral concave portions 9 and the convex portions 10 are connected to each other at the connecting portion J when the both shafts are connected. Must. Spiral recess 9 at connection J
And the convex portion 10 has a stepped portion, the tableware S
Cannot be transported smoothly, causing troubles in the dishwashing operation.

FIG. 6 shows another example of the connecting portion of the unit screw shaft. In this embodiment, the male part and the female part are not formed at the end 21a of the screw shaft 5a and the end 23a of the screw shaft 5h as in the above-described embodiment.
They are formed so as to cross each other, are combined, and are connected and fixed with set screws 25. FIG. 7 shows still another example of the connecting portion of the unit screw shaft.

In this embodiment, the unit screw shaft 5a
The end 21b of the unit screw shaft 5h and the end 23b of the unit screw shaft 5h are also in a mutually misaligned state, are engaged with each other, and are fitted together, and are fixed with set screws 25. The structure of the connecting portion J may be appropriately selected depending on the size of the tableware S as an object to be cleaned, the cleaning capability of the cleaning device, and the like.

As described above, in the screw-transfer-type dishwashing apparatus of the present invention, the screw shaft of the dish-transfer means is divided into a plurality of unit screw shafts in the longitudinal direction, and these can be connected to each other. Since the unit screw shaft is short, the machining accuracy of the spiral can be improved, and by connecting them, a screw shaft having a long overall length can be manufactured at low cost.

Further, the washing section is divided into a rough washing step, a finish washing step, and a transporting step, and a unit screw shaft is made to correspond to each of these steps, and the spiral pitch is adjusted to the optimum tableware transfer speed and washing processing for each step. The cleaning efficiency can be adjusted to the best state by changing them together.
In addition, since the screw shaft is configured by detachably connecting a plurality of unit screw shafts, an exchange operation when exchanging the screw shaft due to a difference in the type of tableware is facilitated, and the exchange is performed in a short time. be able to.

As shown in the illustrated embodiment, when the cleaning section is separated into a rough cleaning step, a transport step, and a finish cleaning step, and a unit screw shaft divided for each step is connected to form a screw shaft. In each step, the spiral pitch can be changed in each step, and the interval and the transfer speed of the continuously supplied tableware can be adjusted according to the type of tableware and the attached state of the attached matter, so that the washing effect of the tableware is enhanced be able to.

[0026]

According to the present invention, in a screw transfer type dishwashing apparatus, the screw shaft is separated into a plurality of unit screw shafts in the longitudinal direction and is removably connected to each other to form a long screw shaft. However, it is possible to easily process a spiral having high dimensional accuracy, and to easily replace a screw shaft having an arbitrary spiral pitch with a screw shaft, thereby improving the washing efficiency of tableware.

Further, the washing section is divided into a rough washing step, a finish washing step, and a conveying step, and the helical pitch of the unit screw shaft divided so as to correspond to these steps is determined by selecting the optimum table transfer speed and washing speed for each step. When the cleaning efficiency is changed in accordance with the processing, the cleaning efficiency can be adjusted to the best state.

[Brief description of the drawings]

FIG. 1 is a schematic longitudinal sectional view showing a main part of a washing section in an example of a dishwashing apparatus according to the present invention.

FIG. 2 is a schematic cross-sectional view taken along line XX of FIG.

FIG. 3 is a schematic plan view showing a connection portion of a screw shaft used in the present invention.

FIG. 4 is a schematic longitudinal sectional view showing a connection portion of the screw shaft of FIG. 3 in an axial section.

FIG. 5 is a schematic transverse sectional view taken along the line ZZ of FIG. 4;

FIG. 6 is a schematic cross-sectional view corresponding to FIG. 3, showing another embodiment of the present invention.

FIG. 7 is a schematic cross-sectional view corresponding to FIG. 3, showing still another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dishwasher 2 Introduction part 3 Washing part 4 Outlet part 5,6 Screw shaft 5a, 5h, 5b; 6a, 6h, 6b Unit screw shaft 7,8 Holding member 9 Concave part 10 Convex part 11 Rough washing process 12 Finish Cleaning process 13 Transport process 21, 21a, 21b, 23, 23a, 23b End portion 22 Male portion 24 Female portion J Connection portion S Tableware F Outer edge portion

Claims (3)

[Claims] A plurality of screw shafts, each of which has at least two screw shafts for transferring the outer edge of the tableware by engaging the outer edge of the tableware with the spiral recess, and at least one holding member for guiding the outer side of the tableware in contact with the outer side of the tableware; A long support member is used as tableware transfer means, and the tableware transfer means is installed so as to extend from the tableware introduction section to the tableware discharge section through the washing section, and divides the screw shaft into a plurality of unit screw shafts in the longitudinal direction. In addition, a screw transfer type dishwasher in which these unit screw shafts are detachably connected. 2. The cleaning section is separated into an upstream rough cleaning step and a downstream finish cleaning step with a transfer step interposed therebetween, and corresponds to each of the rough cleaning step, the transfer step, and the finish cleaning step. The screw-transfer-type dishwasher according to claim 1, wherein the unit screw shaft is arranged so as to perform. 3. The unit according to claim 2, wherein the pitch of the spiral recesses of the unit screw shaft corresponding to the transporting step is larger than the pitch of the spiral recesses of the unit screw shaft corresponding to the rough cleaning step and the finishing step, respectively. Screw transfer type dishwasher.