JP4092759B2 - Method of conveying goods - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for conveying an article.
[0002]
[Prior art]
In FIG. 7, the article m is on the transfer surface 1 a of the diaphragm 1. In order to convey this in the direction of the arrow, the diaphragm 1 vibrates linearly in an oblique direction. Although the gravitational acceleration g is acting on the article m, if a vibration acceleration larger than this is exerted, the article m jumps from the transfer surface 1a and falls again onto the transfer surface 1a. Since the jump direction is an oblique direction with respect to the transfer surface 1a, it proceeds in a certain distance and in the direction of the arrow when dropped. By repeating this, the article m is conveyed on the transfer surface 1a.
[0003]
[Problems to be solved by the invention]
However, a collision sound is generated every time the jump-fall is repeated, so that depending on the material of the article m, it is annoying and cannot be applied to a fragile article. It is an object of the present invention to provide a method for conveying an article that is quiet against such an article and does not break the article.
[0004]
[Means for Solving the Problems]
The above problem is that when the transfer surface of the article is moved in the transfer direction, the acceleration α in the direction perpendicular to the transfer direction and the transfer surface of the article is positive, and the object is moved in the direction opposite to the transfer direction. The article conveying method is characterized in that the vibration in the vertical direction is added so as to be negative (however, | α | <a component perpendicular to the transfer surface of gravity acceleration) .
[0005]
When the transfer surface of the article is moved in the transfer direction, a large drag acts on the article and the frictional force increases. When the transfer surface of the article is moved in the direction opposite to the transfer direction, a small drag acts on the article and the frictional force becomes small. Therefore, it is possible to carry the article without breaking it without jumping and dropping.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
According to the present invention, the following movement is performed on the diaphragm 1a of FIG. The point P on the transfer surface 1a is at the position shown in FIG. 1A at time t0. It will be at the position shown in FIG. 1B at time t1. At time t2, the position is the same as the position at time t0 in FIG. 1A, that is, the center position. Next, at the time t3, the left dead center is reached. At time t4, the center position is reached as shown in FIG. 1C. The right dead center is reached at time t5. Thereafter, at time t6 and t7, as shown in FIG. 1D, the center position and the left dead center are reached.
[0007]
If the above movement is performed sinusoidally, the point P is displaced in time as shown in FIG.
[0008]
At time t1-t3, as is apparent in FIGS. 1, 2, and 7, the point P moves backward with respect to the horizontal direction. Advance at time t3-t5. Retreat at time t5-t7.
[0009]
According to the first embodiment of the present invention, the positive and negative vertical accelerations α (| α | <g) that change as shown in FIGS. Added to.
[0010]
When the diaphragm 1 is moving forward, a force of m (g + α) acts on the article m in the vertical direction. Here, g is the acceleration of gravity, and m represents the mass of the article m here. That is, a large drag acts on the article m, and when the friction coefficient between the transfer surface 1a and the article m is μ, the friction force is μm (g + α). Accordingly, since the acceleration x mass m of the horizontal movement can be made sufficiently smaller than this, the article m moves forward together with the diaphragm 1 in the horizontal direction. That is, the above-mentioned time t3-t5 advances spatially by the distance shown in FIG. 1C.
[0011]
When the diaphragm 1 is retracted, a force m (g−α) acts in the direction perpendicular to the article m. This is sufficiently small. Therefore, the frictional force at this time, μm (g−α), is also sufficiently small, and there is a time during which the horizontal excitation force is larger than this. At this time, the article m advances relative to the transfer surface 1a. Thereafter, by repeating the above-described operation, the article m is conveyed forward on the transfer surface 1a.
[0012]
FIG. 5 shows a second embodiment of the present invention. As shown by A, a rectangular wave acceleration β (<g) is applied in the vertical direction in synchronization with forward and backward movements. The velocity and displacement in the vertical direction change with time as indicated by B and C. Also in this case, the article m is gently conveyed on the transfer surface 1a without impact.
[0013]
FIG. 6 shows temporal changes in acceleration, velocity and displacement according to the third embodiment of the present invention. In this embodiment, the acceleration γ suddenly rises from time t3, reaches a peak, and then falls gently. is doing. At time t5, it becomes 0, and then the acceleration rapidly decreases with a negative polarity, reaches a negative peak, and then gradually decreases to 0. A speed change obtained by integrating this is indicated by B, and a displacement obtained by further integrating this is indicated by C. Such acceleration can be formed, for example, by selecting a charging capacity of a capacitor and a resistor connected to the capacitor. Even when the acceleration is moving in the horizontal direction of the vibration plate 1, that is, when it has a positive polarity during the time t 3 -t 5 and then moves backward in the horizontal direction, it is negative. Polar acceleration is applied in a direction perpendicular to the diaphragm 1. Also in this embodiment, the absolute value of the acceleration γ is smaller than the gravitational acceleration g. Therefore, the same operation as in the above embodiment is performed. In other words, any article m that is quiet and easily broken can be safely transported without breaking.
[0014]
As mentioned above, although embodiment of this invention was described, of course, this invention is not limited to these, A various deformation | transformation is possible based on the technical idea of this invention.
[0015]
For example, in the above embodiment, the transfer surface 1a of the diaphragm 1 has been described as being disposed horizontally, but the present invention can also be applied to the case where the transfer surface 1a is raised or lowered several times with respect to the horizontal. It is. Even in this case, the article is transported in a direction parallel to the transfer surface, and the acceleration in the direction perpendicular to the transfer surface is synchronized with the forward and backward transfer in the transfer direction as in the above embodiment. Change polarity. In this case, it is clear that the same effect can be obtained if the vertical component of the gravitational acceleration g with respect to the transfer surface, that is, gcosΔ (Δ is the inclination angle of the transfer surface with respect to the horizontal direction). In this modified example, the forward and backward movements have been described as conveying articles in parallel to the transfer surface. However, the case where the horizontal component is advanced or moved backward is defined as being included in the present modified example. Without being limited to the shape of acceleration according to the above embodiment, for example, even a sawtooth wave is applicable to the present invention.
[0016]
Furthermore, the temporal change of the reciprocating motion in the horizontal direction or the transfer direction is assumed to change sinusoidally in the first embodiment, but is not limited to this, and may be changed non-sinusoidally. Good.
[0017]
【The invention's effect】
As described above, according to the article conveying method of the present invention, any article can be quietly conveyed without breaking it.
[Brief description of the drawings]
FIG. 1 shows a situation in which the position of a point P on a transfer surface of a diaphragm 1 according to an embodiment of the present invention changes with time, A is a movement of a point P between times t0 and t1, and B is a time t1. -The movement of the position of the point P from t2 to t3, C represents the movement of the position of the point P to the time t3-t4, and further to the time t5, and D represents the movement of the position of the point P at the time t5-t6-t7. .
FIG. 2 shows temporal changes in horizontal displacement and vertical acceleration of the diaphragm 1 according to the first embodiment of the present invention.
3 shows a temporal change (FIG. B) of acceleration α applied in the vertical direction with respect to the displacement of the position of point P on the diaphragm (FIG. A) at time t3-t5 according to the same embodiment.
FIG. 4 represents the displacement movement of point P at time t5-t7 (FIG. A), and represents the temporal change (FIG. B) of acceleration α synchronized therewith.
FIG. 5 shows temporal changes in acceleration applied in the vertical direction according to the second embodiment of the present invention, where A is the same acceleration, B is velocity, and C is temporal change in displacement.
FIG. 6 shows temporal changes in acceleration according to a third embodiment of the present invention, where A is the same acceleration, B is velocity, and C is a temporal change in displacement.
FIG. 7 is a side cross-sectional view illustrating a transfer state of an article m on a transfer surface of a diaphragm according to a conventional example.
[Explanation of symbols]
1 Diaphragm 1a Transfer surface m Article t1 Time t2 Time t3 Time t4 Time t5 Time t6 Time t7 Time α Vertical acceleration β Vertical acceleration

Claims (5)

When the transfer surface of the article is moved in the transfer direction, the acceleration α in the direction perpendicular to the transfer direction and the transfer surface of the article is positive, and negative when the acceleration is moved in the direction opposite to the transfer direction. (Note that | α | <component perpendicular to the transfer surface of gravity acceleration) is applied to the vertical vibration, so that the article is conveyed. 2. The method for conveying an article according to claim 1, wherein a transfer surface of the article is a horizontal plane, and the acceleration is set to | α | <gravity acceleration g. The method for conveying an article according to claim 1 or 2, wherein both or one of the movement of the transfer surface and the acceleration changes sinusoidally. The method for conveying an article according to claim 1 or 2, wherein both or one of the movement of the transfer surface and the acceleration changes in a rectangular wave shape. The method of conveying an article according to claim 1 or 2, wherein both or one of the movement of the transfer surface and the acceleration changes in a pulse shape.

Images