JP2005227011A - Drop testing device and drop testing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drop testing device capable of carrying out a drop test by easily holding the desired attitude of even a large and heavy packing box for large-sized AV equipment. <P>SOLUTION: The packing box 100 is placed on the upper face of a base 2, and the base 2 is held at a predetermined height to a base 1 by a base holding member 3. The packing box 100 is covered with a sheet-like net 200, and the net 200 is fixed to posts 201a-201d to hold the packing box 100 in the predetermined attitude by the net 200. In the drop test, the base 2 falls onto the base 1 by an air actuator 5 at a higher speed than a free fall speed. The packing box 100 loses its lower support by the fall of the base 2 and falls freely, but because of being held in the predetermined attitude by the net 200, the packing box 100 falls freely on the surface of the base 1 while keeping its attitude. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging box drop test method and a drop test apparatus for performing the same, and in particular, a ridge and corner drop test method of a packaging box for packing a large AV device and suitably used for this test. The present invention relates to a drop test apparatus that can

In order to prevent breakage or damage of the AV device in the process of distributing the completed AV device, a packaging box that covers the AV device is usually used. Then, a drop test is performed as a test for confirming whether or not there is a defect in the packaging by the packaging box. As a drop test apparatus, although the detailed structure is different, generally, a base serving as a base of the apparatus, a base for holding the packing box at a predetermined height from the base, and a packing box on the base are described above. And a dropping mechanism that freely drops the base (see, for example, Patent Documents 1, 2, and 3).
Japanese Utility Model Publication No. 63-181938 Japanese Patent Laid-Open No. 62-263435 JP 2000-65677 A

  However, the drop test apparatus described in Patent Documents 1 to 3 is an apparatus that performs a drop test of a relatively small packaging box. That is, the drop test apparatus of Patent Documents 1 and 2 is to drop the packing box onto the surface of the base by rotating the table on which the packing box is placed and retracting it. Since the packaging box for equipment is large and heavy, a large burden is imposed on the rotating mechanism, and it is difficult to stably hold and drop the packaging box in which the large AV equipment is packed. Moreover, in the drop test apparatus described in Patent Document 3, since the packaging box is hung with a string, it is very difficult to handle a large packaging box for large AV equipment, and the packaging box is very dangerous to set.

  As a device for solving such a problem and performing a drop test of a large packaging box, a drop test device having a structure shown in FIG. 6 has been proposed.

FIG. 6 is an external perspective view of a conventional drop test device for a large packaging box.
The drop test apparatus shown in FIG. 6 includes a base 1 on which the packaging box 100 falls, a base 2 on which the packaging box 100 is placed, a base holding member 3 that holds the base 2, and the base holding member 3 in the vertical direction. And a guide 4 that leads to The drop test apparatus includes an air actuator 5 that applies a vertical downward force to the table holding member 3, a shock absorber 6 that absorbs the impact of the dropped table 2 and the table holding member 3, and the table 2 and the table holding member 3. And a platform lifting mechanism (not shown). In addition, the base 1 is formed with a groove 11 in which the base 2 and the base holding member 3 are loosely engaged.

  In such a drop test apparatus, the packaging box 100 falls freely and collides with the base 1 when the platform 2 falls at a speed faster than the free fall velocity. For this reason, in this structure, by making the stand 2 and the stand holding member 3 correspond to the size and weight of the packaging box for performing the drop test, it is possible to perform the drop test even for a large packaging box.

By the way, the drop test is normally performed for one corner of a 6-sided 3 ridge.
FIG. 7 is a perspective view showing a posture holding state during a ridge and corner drop test in the drop test apparatus shown in FIG.
As shown in FIG. 7, the conventional drop test apparatus uses a structure in which the packaging box 100 is held in a predetermined posture by a single support bar 7a or arm 7b.

  However, the single support bar 7a and arm 7b can be held relatively stably in a small packing box, but for large and heavy packing boxes, hold the ridge or corner in the lower end. Even if the posture can be held once, it is unstable and the posture is likely to change before the fall starts.

  An object of the present invention is to provide a drop test apparatus and a drop test method that can easily hold a desired posture and perform a drop test even for a large and heavy packing box for large AV equipment. .

  The present invention includes a base on which the packaging box freely falls and collides, a stage on which the packaging box is placed on the upper surface, and the base is held at a predetermined height with respect to the base, and at a speed higher than the free fall speed. In a drop test apparatus comprising a table displacement means for dropping, the apparatus comprises a posture holding means for holding the packing box on the table held at a predetermined height by the table displacement means in a predetermined posture, and the posture holding means is packed It is characterized by comprising a sheet-like member covering the box and a fixing member for fixing the sheet-like member.

  In this configuration, the packing box held in a predetermined posture on the table is covered with a sheet-like member, and the sheet-like member is fixed to the fixing member, so that the packing box is indirectly fixed in that posture. Is done. Since the sheet-like member is only in light contact with the upper side of the packaging box, the packaging box receives almost no force from the sheet-like member when dropped, and the initially fixed posture is maintained. Fall as it is. Thus, by holding the packaging material so as to cover the sheet-like member, the posture of the packaging material can be easily and reliably held, and a drop test can be performed while maintaining this state.

  In addition, the drop test apparatus according to the present invention is characterized in that the sheet-like member is formed of a net in which a plurality of strings are assembled in a lattice pattern at predetermined intervals.

  In this configuration, since the corners of the packing box are engaged with the mesh holes provided in a lattice shape and the posture is stabilized, the posture of the packing box can be easily maintained with a smaller engagement force. Since the net is hung on the packing box, the attitude of the packing box can be more easily maintained.

  In addition, the drop test apparatus of the present invention is characterized in that a support post of a safety fence surrounding the apparatus is used as a fixed member.

  In this configuration, in order to fix the sheet-like member, the fixing member (post) is commonly used as a post that is normally provided to ensure the safety of the test. Therefore, there is no need to newly provide a fixing member, and the posture can be reliably held while having a simple structure.

  Further, the present invention is a drop test method for freely dropping the packing box on the table held at a predetermined height onto the surface of the base, and the table on which the packing box covered with the sheet-like member is placed, A step of moving the table to a predetermined height with respect to the base by the table displacement means, a step of holding the packing box in a predetermined posture by fixing the sheet-like member to the fixed member at this height position, and a table. And a step of freely dropping the packaging box held in a predetermined posture by dropping it at a higher speed than the free fall.

  In this method, as a preparatory stage before dropping, the packing box is held in a predetermined posture by the sheet-like member. When the table falls at a speed faster than the free fall, the packaging box is separated from the table and falls onto the surface of the base while maintaining its posture. According to this method, since the posture of the packaging box can be easily and reliably held by fixing the sheet-like member to the fixing member, the drop test can be easily performed.

  According to the present invention, the packaging box is held so as to be covered with the sheet-like member, whereby the attitude of the packaging box can be easily and reliably held, and a drop test can be performed while maintaining this state. At this time, by matching the shape of the base and the shape of the sheet member to the size of the packaging box, the drop test can be reliably performed regardless of the size of the packaging box.

A drop test apparatus according to an embodiment of the present invention and a drop test method using this apparatus will be described with reference to the drawings.
FIG. 1 is an external perspective view of a drop test apparatus according to the present embodiment, and shows a state of a drop test on one ridge of a packaging box. FIG. 2 is an exploded perspective view for illustrating a relationship among the drop test apparatus, the packing box 100, and the net 200 shown in FIG.

  The drop test apparatus according to the present embodiment includes a base 1 that is horizontally disposed on a floor surface, and a main shaft 10 that is installed at a substantially central portion of one side of the base 1 and that has a vertical direction as an axis. The drop test apparatus includes two cylindrical guides 4 along the main shaft 10 and having a vertical direction as an axis, a base holding member 3 having a through-hole through which the guide 4 is inserted, and movable in the vertical direction. And a table 2 that is vertically connected to the table holding member 3 and has a horizontal surface as a main surface.

  The base 2 is composed of an outer frame portion having a predetermined width and a plurality of prisms formed at predetermined intervals in the long side direction within the frame, and the packaging box 100 is placed on the upper surface in a predetermined posture. The

  The base 1 is provided with a groove 11 into which the base 2 is fitted when dropped, and a cushioning material 12 is installed on the bottom surface of the groove 11 to suppress rebound when the base 2 is dropped. A shock absorber 6 is installed at a portion of the base 1 corresponding to the base holding member 3.

  The main shaft 10 is provided with an air actuator 5 that pushes the table holding member 3 vertically downward at a predetermined height position. Further, the main shaft 10 is provided with locking means (not shown) for locking the bottom surface of the table holding member 3 at the drop test start position. Here, the table holding member 3, the guide 4, the air actuator 5, and the locking means correspond to the “table displacement means” of the present invention.

  In addition, on the outer periphery of the base 1 of the drop test apparatus, pillars 201a to 201d having a predetermined height are installed. Between the pillars 201a and 201b, between the pillars 201a and 201d, and the pillars 201d and 201c, A wire rope 210 is installed between them. The support columns 201a to 201d and the wire rope 210 constitute a safety fence that prevents an operator from easily entering the drop test apparatus.

  Hooks (not shown) are attached to the upper surfaces of the columns 201a to 201d, and the four corners of the net 200 in which strings (for example, nylon) are assembled in a lattice shape are fixed detachably.

A method of performing a drop test using such a drop test apparatus will be described with reference to FIG.
FIG. 3 is a schematic side view for explaining the drop test method. In this figure, a state in which a drop test is performed on one ridge of the packaging box 100 will be described.

  (1) First, as shown in FIG. 3A, the packaging box 100 is placed on the surface of the base 1 with the base 2 fitted in the groove 11 of the base 1. At the same time, the mesh 200 corresponding to the “sheet-like member” of the present invention is attached to the hooks provided on the upper surfaces of the columns 201a to 201d by making four corners.

  (2) Next, as shown in FIG. 3B, the packing box 100 is placed on the table 2 by lifting the table holding member 3 in the vertical direction along the guide 4. In this state, the base 2 is lifted up to a predetermined height, and when the predetermined height is reached, the bottom surface of the base holding member 3 is fixed with a latching means. At this time, the net 200 is in a state of covering and contacting the upper surface of the packaging box 100.

  (3) Next, as shown in FIG. 3C, the packaging box 100 is replaced with a predetermined posture. In the case shown in the figure, it is replaced with a posture in which one ridge line of the packaging box is the lowest end. At this time, the net 200 has a shape that swells upward around a portion in contact with the packing box 100 according to a change in the posture of the packing box 100. Here, it arrange | positions so that the upper corner | angular part of the packing box 100 may be hung on the hole assembled with the some string which comprises the net | network 200, and the tension | tensile_strength which can maintain this attitude | position is applied, Adjust the mounting position. Thus, by covering and fixing the net 200 on the upper surface of the packaging box 100, the posture of the packaging box 100 can be stably maintained without applying unnecessary force to the packaging box 100.

  (4) Next, when the operator performs a test start operation, as shown in FIG. 3D, the air actuator 5 installed in the vicinity of the upper surface of the table holding member 3 of the spindle 10 moves the table holding member 3 vertically downward. Pushing in the direction, the locking means comes off the bottom surface of the table holding member 3. Thereby, the base holding member 3 is forcibly dropped together with the base 2 at a higher speed than the free fall in the vertical downward direction. On the other hand, since inertia is acting on the packing box 100, free fall is started after staying on the spot for a moment. At this time, the posture of the packing box 100 is held by the net 200, and since only the force for holding the posture is applied to the packing box 100 from the net 200, the packing box 100 is dropped while maintaining the posture immediately before dropping. To do.

  (5) Since a force that allows the base holding member 3 and the base 2 to reach the base 1 faster than the packaging box 100 is applied to the base holding member 3 from the air actuator 5, FIG. As shown, the base 2 and the base holding member 3 fall prior to the packaging box 100, and the packaging box 100 does not contact the base 2 and the base holding member 3 before dropping onto the surface of the base 1.

  (5) Next, as shown in FIG. 3 (f), the packaging box 100 falls and collides with the surface of the base 1 while maintaining its posture. At this time, the base 2 and the base holding member 3 are dropped in advance, the base 2 enters the groove 11 of the base 1, and the base holding member 3 falls on the shock absorber 6. The shock absorber 6 absorbs the drop impact of the base holding member 3 and suppresses upward rebound. Further, the buffering agent 12 arranged on the bottom surface of the groove 11 of the base 1 absorbs the impact of the dropped base 2, and the base 2 rebounds above the groove 11 (above the surface of the base 1). Suppress. As a result, the table 2 once entering the groove 11 is prevented from jumping up and colliding with the packaging box 100.

  After dropping the packaging box 100 in a predetermined posture in such a process, the operator confirms the state of the packaging box 100 and confirms the appearance and operation of the built-in large AV device to see if there is any problem. Confirm. Then, such a drop test is performed on the remaining two ridges.

Next, a drop test method for one corner will be described with reference to FIG.
FIG. 4 is an external perspective view showing a state of a drop test for one corner.
As shown in FIG. 4, the drop test for one corner is a drop test for one edge shown in FIG. 1 except that the packing box 100 is fixed using a net 200 in a posture in which the corner to be evaluated is the lowest end. Is the same.

  Thus, even when performing a drop test on one corner, the net 200 is covered and covered from the upper surface of the packing box 100, and the upper corner portion is hung on the hole formed by the string set without applying unnecessary force. The posture of the box 100 can be stably held. And since unnecessary force is not applied, it can be dropped without changing the posture at the time of dropping.

Next, a method for a drop test on six surfaces will be described with reference to FIG.
FIG. 5 is an external perspective view showing a state of a drop test on one of six surfaces (surface having the largest area). Note that the drop test method for the six surfaces of the packaging box is the same as the drop test method shown in FIG. Thus, when it is not necessary to hold | maintain an attitude | position, by removing the net | network 200, an attitude | position change can be quickly performed with respect to 6 surfaces, and a drop test work can be performed easily and quickly.

  In the above-described configuration, the net is used as a member for maintaining the attitude of the packaging box. However, the present invention is not limited to this, and any sheet-like material that can balance the attitude by contacting the packaging box is not limited thereto. Configuration can be applied.

FIG. 3 is an external perspective view showing a state of a drop test for one ridge in the drop test apparatus according to the embodiment of the present invention. 1 is an exploded perspective view showing the relationship between the drop test apparatus, the packing box 100, and the net 200 shown in FIG. Schematic side view for explaining the drop test method External appearance perspective view which shows the state of the drop test with respect to one corner in the drop test apparatus which concerns on this embodiment External appearance perspective view which shows the state of the drop test of 1 surface (surface with the largest area) in 6 surfaces in the drop test apparatus which concerns on this embodiment. External perspective view of a conventional drop test device The perspective view which shows the state at the time of the drop test of the edge and the corner in the drop test apparatus shown in FIG.

Explanation of symbols

1-base 2-base 3-base holding member 4-guide 5-air actuator 6-shock absorber 7a-arm 7b-support bar 11-groove 12 in base 1-buffer material 100-packing box 200-net 201a- 201d-post 210-wire rope

Claims (4)

A base on which the packing box freely falls and collides, a base on which the packing box is placed on the upper surface, and the base is held at a predetermined height with respect to the base and dropped at a speed equal to or higher than the free fall speed. In a drop test apparatus provided with a table displacement means for causing
Posture holding means for holding the packing box on the table held at a predetermined height by the table displacement means in a predetermined posture;
The posture holding means includes a sheet-like member that covers the packing box and a fixing member that fixes the sheet-like member.   The drop test apparatus according to claim 1, wherein the sheet-like member is a net in which a plurality of strings are assembled in a lattice shape at a predetermined interval.   The drop test apparatus according to claim 1, wherein the fixing member is a support post of a safety fence surrounding the apparatus. A drop test method in which a packaging box on a table held at a predetermined height is freely dropped on the surface of the base,
The stage on which the packaging box covered with a sheet-like member is placed is moved to a predetermined height with respect to the base by the stage displacing means and held, and
A step of holding the packing box in a predetermined posture by fixing the sheet-like member to the fixing member at the height position;
And a step of freely dropping the packing box held in the predetermined posture by dropping the table at a speed higher than the free fall.

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