JPS58208643A - Apparatus for inspecting strength of wood - Google Patents

Abstract

PURPOSE:To make it possible to constinuously measure the strength of wood over the entire cross sectional area thereof, by a method wherein two roller conveyors at an arbitrary position of a roller conveyor mechanism are spaced apart only a definite distance and a pressurizing mechanism for applying desired pressure to a veneer material while sending is arranged above the central part therebetween. CONSTITUTION:Roller conveyors 1a, 1b at an arbitrary position of a roller conveyor mechanism 1 are spaced apart a desired distance (b) and a pressurizing part 3 consisting of a pressurizing member 3a loaded with a definite weight W, a cylinder 3b, a pressurizing roller 3c and a meter 3d is provided above the central part therebetween. In this state, a veneer whose lateral width (l1) and longitudinal length (l2) are preliminarily measured is run on the mechanism 1 to be pressed by a pressurizing part 3 and the deformation amount (a) is measured by the meter 3d. By this method, the Young's modulus and the bending strength of the veneer 2 can be known.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wood strength testing device, and its purpose is to provide a wood strength testing device capable of measuring wood strength continuously, over the entire cross section, and in all pieces while feeding a single wood. It is provided by.

Conventionally, the Young's modulus or bending strength of a single material such as wood has been measured by preparing a test piece based on JIS standards and using this test piece in a predetermined manner.

Furthermore, the usual method of measurement was to sample a specific number of single materials based on a required method, measure only the sampled materials, and estimate the mechanical strength of the entire single material collection.

However, wood, which is a natural product, such as single wood, has the drawback that its individuality varies greatly, and even in a single-wood pot body, the mechanical strength varies depending on the knots, dead knots, or running grain in each cross section. The drawback is that the sampled and measured values cannot necessarily be used as an analogy for the mechanical strength of the entire collection of single materials.

This invention has been made to eliminate the above-mentioned drawbacks, and one embodiment of the invention will be described in detail below with reference to the drawings.

In the figure, (1) is a roller conveyor mechanism, and (2) is a single material that continuously runs on this roller conveyor (Mifl) and is sent to the next stage.

(1a) and (ib) are the roller conveyors installed at the required measurement locations of this roller conveyor @ correction (1), and the required distance (b) is set between these roller conveyors (1a) and (1b). .

(3) is this special roller conveyor (1a), (1b)
This pressurizing mechanism (3) has a pressurizing part (3a) on which a constant load of il[1 (W) is placed above it, and this pressurizing part If. It is made up of a cylinder (3b) that is connected to (3a) and a pressure roller (6c) that is a free roller that is installed at the tip of the rod of this cylinder (3b). The strain rate of single ↑4 (2) due to the load applied by 1l (3a) is calculated as necessary (
3d) is measured with a meter.

In addition, the horizontal length 11) and vertical length 12) of the single material (2) are measured in advance. The wood strength test 711 with such a configuration measures the length of the single material on the roller conveyor mechanism (1). (For the beast that 2+ is continuously transporting, apply the force (w) to the pressurizing part (3a) and move the energized cart (W) by adjusting the rod length of the cylinder (3b). The length of the pressure roller (3C) is adjusted so that it surely comes into contact with the surface of the material (2), and the load center') is always located near the center between the specific roller conveyors (ia) and (ib). Add force to the single material (2).

In addition, the pressure roller (3) is used to apply the force of the cart (W) to the single material (2).
c), so the roller conveyor mechanism (1)
The conveyance of the single material (2) is not hindered by pressurization, and since the single material (2) is constantly being transported, the load is applied to the entire cross section of the single material (2), which in turn increases its strength. is determined over the entire cross section.

This load (w) is transferred from the pressure section (3a) to the pressure roller (3C
), the single material J (2) will be deformed by this applied pressure 1B (3a).

This amount of deformation: (a) is visually observed with a meter (3d), or this amount of deformation (a) is input. That is, the length of the arm of the rod of the cylinder (3b) extending from the position of the intended pressure roller (3c) becomes equal to the amount of deformation (a) of the single material (2).

Retrograde n1 single material (Young's modulus of 22 is Young's modulus (EX)
-W
Since l(b) is also a known quantity, the deflection jt(a) is 111
11 Just by constant, there is a single phase l! , lr m+ Young's modulus (EX) is determined in each case by 1111.

Since v1 is calculated by
This also means that only the single material (2) that can withstand the above-mentioned conditions (2) passes the strength test and is transported to the next process.

As described above, the wood strength testing device according to the present invention uses the roller conveyor imitation f angle, and the roller conveyor +! A certain distance (b) is spaced between the two roller conveyors at arbitrary positions in the R structure, and a certain amount of pressure is applied to the single material while the single material is being fed above the center between the roller conveyors separated by this certain distance. Since it is a wood strength testing device equipped with a pressurizing mechanism, it has the advantage of being able to measure the mechanical strength of all pieces of wood while transporting them to the next process, and of aging surfaces. If you bring this device to the people at the residential building, and if it turns out to be a pestle during the transportation process, you'll have to pay a horizontal inspection! They also laugh at the effect that it is possible to have one person and six people.

By storing the obtained numerical values in a storage device or the like and processing them, it is possible to further improve process automation and quality control.

[Brief explanation of the drawing]

The drawing is an explanatory side view of the wood strength testing device according to the present invention.

Claims (1)

[Claims] tl) A roller conveyor &m is arranged, a certain distance is separated between the two roller conveyors at any position of this roller conveyor mechanism, and the single material is sent above the center part between the roller conveyors separated by this certain distance. This wood strength testing device is equipped with a pressurizer that applies the required pressure to a single piece of wood while keeping it in place.