Pallet strength confirming device

[Detailed Description of the Invention]

[Industrial Application] In the warehouse which stores a handling thing in three dimensions using wooden palettes, the present invention relates to the device which checks a wooden palette intensity life. [Description of the Prior Art] Wooden palettes are using the material of the tree species and moisture content which are specified to JIS in consideration of the size of a palette, a kind, load, etc. at the time of manufacture. There is a following JIS standard about a palette. The bending test method JISZO603 flat-pallet JISZO604 wooden palette of the flat pallet JISZO602 flat pallet for JISZO601-Transit transport The maintenance after manufacture and the controlling method in particular about a repair standard do not have regulation, and the user is performing them uniquely. If it is a grade which only tiers 2~3 steps in a flat-stacking warehouse, it does not become a problem by lack of a member and the grade which are corroded, and it comes floating and deals with by a forklift as Ho. However, by rationalization of a distribution system, when it becomes a solid warehouse method, loading Valente will be kept in a multi stage rack, and they are the intermediate conveyance equipment, a palletizer, a palette magazine, etc., The trouble by poor management of a palette must be avoided, is inevitably established in an appearance check standard, and has been well managed in comparison. It is used only for storage within all the Box, and if the palette which is not taken out outside is managed on the usual standard, without being exposed to rain, there will be almost no intensity fall. [Problem(s) to be Solved by the Invention] however -- like the flat pallet for - Transit transport -- Valente -- Stay as it is -- the palette which is conveyed and is used in common with mutual in related each industry, There are many opportunities which are various means-of-transportation and storage light etc., and are exposed to rain etc., and if moisture content of wooden palettes also increases, intensity falls below to half and the corrosion by progress years is also taken into consideration, further falling is clear until it once ships and re-uses a warehouse. Also as for the handling thing, if it becomes a base distribution center, it is next to impossible to check the collected wooden palettes respectively, and it is as hard as possible to find lack of a board etc. at most. For the reason, in the automatic warehouse system using the fall due to the strength reduction of a palette, or a stacker crane, the trouble has sometimes occurred in the solid warehouse at the time of rack storing. There is the object of the present invention in checking the strength reduction of a palette in order to avoid such a trouble. [Means for Solving the Problem] [ in the middle of a conveyor which the present invention conveys in support of both ends of an empty palette ], A compressor which adds load to the upper surface of a palette on the conveyor is formed above the conveyor, A bending detection machine which detects bending in contact with the undersurface of the palette under the pressure 1 i!s was formed, a spring constant was calculated with load of the compressor, and a detection value of the bending detection machine, and a control device which judges a quality by comparison with the spring constant and full limits was formed. [For Work ] A collected palette is conveyed by conveyor one by one, it bends with a compressor, and bending of a palette is measured with a testing machine, and when a spring constant is below a predetermined value, it is judged as a poor palette. [An example of real Application] Hereinafter, 1st [ The ] figure~figure 4 explains one example of the present invention. Collected palette 1 is usually conveyed via a conveyor line to a palletizer, in order to load a handling thing again. an uninvented palette intensity confirming device is installed in the middle of this conveyor line. Hereinafter, this palette intensity confirming device is explained. This device consists of conveyor line 10 which conveys palette 1, bending testing machine 30, and conveyor 50 which eliminates a poor palette. frame body 13 in which conveyor 10 combined section steel etc., chain 14 conveyed in support of both ends of Pallet l, sprocket 15, and drive motor 16 -- it is come out and constituted. Chain 14 moves along with Cheno guide 17 on frame body 13, and conveys palette 1 horizontally. In the upper stream of conveyor 2, and the lower stream, it is the same as that of upper conveyor 10 respectively. A palette magazine (what tiers and stocks a palette) is downstream from downstream conveyor 26. Testing machine 30 bends with compressor 31, and consists of detection machine 41. Compressor 31 hung on the undersurface of mount 33 fixed to floor 9, and it has attached contact portion 35 which adds concentration load to two places of the upper surface of palette 1 at the tip, enabling free rise and fall. Contact detector 36 which detects whether the undersurface of the contact portion contacted the upper surface of palette l is installed in this contact portion 35. Bending detection machine 41 is set up by floor 9 of a lower part of palette l, and is installed in the middle of two Cheno 14. Bending detection machine 41 detects bending by load of compressor 31 of palette 1. Contact detector 45 which detects whether the undersurface of palette 1 was contacted is installed in contact portion 43 of a upper end of bending detection machine 41. 20 is a stopper for making a prescribed position suspend palette 1, and can be gone up and down freely. In Drawing 3, conveyor 50 which takes out a poor palette in the middle of downstream conveyor 26 is formed. Operation of conveyors 10, 25, and 26, 50. stopper 20, and testing machine 30 is controlled by useless control device Off * (not shown) which examines automatically. This control device operates based on a flow chart of Drawing 4 about an examination. Hereinafter, operation is explained with Drawing 4. Collected palette 1 is intermittently conveyed by conveyor 10 from upper conveyor 25. It is made to stop by stopper 20, and palette 1 conveyed by conveyor 10 stops operation of conveyor 10. In this state, testing machine 31 is driven and contact portion 35 is dropped. Descent will be stopped if contact detector 36 of contact portion 35 detects contact to the Pallet 1 upper surface. At this time, load load of compressor 31 is zero. Bending detection machine 31 is driven and contact portion 43 is raised. A rise will be stopped if contact detector 45 of contact portion 43 detects contact to the palette undersurface. At this time, a measurement bending value is zero. A set of testing machine 31 and bending detection machine 41 is completed by the above. (Step S1) After the above-mentioned condition completion check, compressive load is again loaded to default value, the amount of bending at that time is measured, a spring constant value (unit kg/mm) of palette 1 is calculated, and it compares with full limits which are eye law separately. When a spring constant value calculated by examination is lower than full limits, it is judged as a poor palette. (Step S3.S4) In the case of a poor palette, it reports to conveyor 50. (Step S5) Next, each contact portion 35 and 45 of testing machine 31 and bending detection machine 41 and Stone Per 20 are evacuated, conveyor 20 is operated, and it conveys on downstream conveyor 26. In the case of (Step S7.S9) and a poor palette, it is eliminated by conveyor 50. Here, it is an important point to decide the full limits. It bends with load of wooden palettes, and as long as a relation of quantity is approximately proportional linearly and takes a certain width into consideration also by a public experimental result, it may be judged to be a straight line. A result of having computed a spring constant value of various palettes of a scrap in an experiment is just before a new article, medieval times, and a scrap Drawing 5. If it passes years, moisture content etc. will increase and a spring constant value of wooden palettes will fall, as shown in a figure. And it is saturated for a numerical value which is after-manufacture about three-year~five years. When spring constant value - at the time of a new article is set to 100, in the time of saturation, it is about 50. Although there is usually about two safety ratio to rated loading load also in the time of this saturation and it is satisfactory, if an inside has corrosion etc., this figure will fall extremely (or Destruction film). Therefore, an intensity trouble is avoidable by detecting and removing a palette which is below this saturated spring constant value. The full limits are provided in a value smaller than a saturated spring constant value. According to the present invention, even if it does not inspect finely corrosion etc. of wood which constitutes a palette, there is an effect which can detect a poor palette. [Effect of the Invention] Since Valente's intensity check can be performed automatically according to the present invention, when dealing with a lot of palettes, such as a solid warehouse, it is effective in abolishing the trouble by the palette breakage at the time of storing with an inspector's simplification.

[Brief Description of the Drawings]

The flow chart of the control device of the present invention and Drawing 5 of the upper surface figure and Drawing 4 which the side view of the present invention looked at Drawing 1, and Drawing 2 looked at from the B-B line of Drawing 1 in the A-A line sectional view of Drawing 1 and Drawing 3 are the years after manufacture of wooden palettes, and a graph of a spring constant value. 1 ------ A palette, 10, 25, 28, 50 ----- A conveyor, 30-----1 testing machine, 31-----1 compressor, 4 ----- A 1 bending testing machine, 92 figures Neighborhood - 111Burning' Drawing 43