JP2003137432A - Tray stacking and cargo arrival system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stacking and cargo arrival system for stacking a tray whereon a sample is stored while avoiding load collapsing, and arranging the tray on a conveyer sequentially from the tray at a lower stage by vertically moving the stacked trays while keeping them horizontal in order to avoid load collapsing. SOLUTION: In addition to a vertical movement mechanism, a synchronizing movement means by a rack and a gear for equally maintaining a height position of right and left pressurizing arms for holding the tray is formed with respect to a pair of perpendicularly moving bodies so as to move them perpendicularly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to stacking trays so that they do not collapse, lifting the stacked trays so that they do not collapse, and loading only one of the bottom trays onto a conveyor for horizontal movement. Regarding the system to let.

[0002]

2. Description of the Related Art FIG. 3 is a front view of a conventional tray stacking / loading system. Reference numeral 1 is a conveyor, and 2 is a tray, which is made of a material having a small bending, and is used for aligning and storing electronic components to be tested. Reference numerals 31 and 32 denote pressurizing arms, which are opposed to each other on the left and right sides and hold the tray 2 from both side surfaces. 4 is a vertical moving body. Reference numeral 5 denotes a vertical portion of the base, which holds and supports the vertical moving body 4 so as to be vertically movable, and is also a support body of the conveyor 1. The tray 2 can be gripped without being deformed even if pressure is applied from both side surfaces. By this,
When the second tray from the bottom is sandwiched by the pressing arms 31 and 32 and lifted while being stacked on the conveyor 1, only the bottom tray can be left on the conveyor to lift the total number. The bottom tray is placed on the conveyor, moved horizontally and discharged, and then the stacking tray that was lifted first is loaded on the conveyor. In the tray stacking / loading system in which such work is repeated, if the vertical positions of the left and right pressure arms 31 and 32 are different, the tray may tilt and the load may collapse. FIG. 4 is an enlarged view of the main part of FIG. 3 and shows the left and right vertical moving bodies 4 to which the pressure arms are attached when the side surface of the tray 2 is held upward by the pressure arms 31 and 32 and is pulled upward. There is a difference in vertical movement speed, and the tray 2 is in a state of being slightly inclined from the horizontal position.
Reference numeral 30 is an air cylinder that drives the pressure arms 31 and 32 in the horizontal direction, and 40 is a power source air cylinder that moves the vertical moving body 4 up and down. Although the air cylinder 40 has a function of stopping at a set fixed position, there is a drawback that the vertical movement speed slightly differs between left and right. The upward velocity of the vertical moving body is indicated by the arrow on the left A and the arrow on the right B. In this way, the difference in speed causes the collapse of the tray load, hinders smooth tray transfer, and reduces the reliability of the tray loading system operation.

[0003]

[Problem to be Solved by the Invention] [Problem to be Solved by the Invention] As described above, a system is provided in which stacking is performed so as not to cause load collapse, and stacking trays are vertically moved while always maintaining a horizontal position so that the bottommost trays are sequentially loaded. It is an object of the present invention.

[0004]

[Means for Solving the Problems] When the trays on which the objects to be tested are aligned and placed are made of a material having a small deflection, the trays can be pressed by the side and gripped. Hold the eye tray from both sides with pressure arms to lift all trays, leave only the bottom tray and load it on the conveyor, discharge the bottom tray horizontally, and then stack as above. In a tray loading system that repeats the vertical motion of moving the trays downward and loading them on the conveyor, in order to prevent the stacked trays from collapsing, the movement speed of a pair of vertical moving bodies equipped with a pressure arm is different. The tray is maintained in a horizontal position by providing a synchronous movement means for forcibly synchronizing and vertically moving so as to prevent the occurrence of the problem. Stacking can be performed by horizontally feeding the trays on the uppermost tray at the upper stop position in the vertical movement reciprocating between the upper stop position and the lower stop position.

According to a third aspect of the present invention, as a synchronous movement means, a rack is fixed to a vertical moving body which is supported by being held by a base vertical portion so that vertical movement can be performed, and a gear which meshes with the rack is attached to the base vertical portion. By providing the rotary motion, the synchronous motion means for converting the speed of the vertical motion into the speed of the rotary motion and transmitting the converted motion.

According to a fourth aspect of the present invention, the gears constituting the synchronous movement means are a pair of gears connected by the same axle, and are gears of the same shape, the same size and the same module. Velocity was converted to rotational velocity and linked to the vertical motion velocity of the other rack.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described with reference to FIGS. FIG. 1 is a front view of the tray loading system as seen from the front of the conveyor 1. FIG. 2 is a side view thereof. Reference numeral 1 is a conveyor, and 2 is a tray, which is made of a material having small bending and is arranged and accommodated with electronic components to be tested. Reference numerals 31 and 32 denote pressure arms that oppose each other on the left and right sides, and hold the tray 2 from both side surfaces. 4 is a vertical moving body. Reference numeral 5 denotes a base vertical portion, which is a support body of the conveyor 1 which holds and supports the vertical moving body 4 so as to be vertically movable. The tray 2 can be gripped without being deformed even if pressure is applied from both sides,
When the second tray from the bottom is sandwiched by the pressure arms 31 and 32 and lifted while being stacked on the conveyor 1, all the trays can be lifted while leaving only the bottom tray. Pressure arm 3
The stacking trays are clamped by the pressure of the air cylinder 30 that drives 1, 32 horizontally. Left and right pressure arms 31, 32
The left and right vertical moving bodies 4 attached with are vertically moved by the air cylinder 40. The figure from the center to the left half of FIG. 1 shows the state in which the vertical moving body 4 is at the upper stop position.
The drawing from the center to the right half of FIG. 1 shows a state in which the vertical moving body 4 is in the lower stop position. The tray 2 is in the lower stop position, and when it is in the upper position, the second or more stacked trays 21 from the bottom are pressurized and lifted from both sides.

The air cylinder 40 is provided with a position detecting sensor for accurately stopping at the upper and lower set positions, and the vertical movement can be surely performed by sequential control. The bottom tray in the stack is placed on the conveyor for horizontal movement and discharge, and then the stack tray that was previously lifted is loaded on the conveyor. In the tray loading system that repeats such work, the vertical movement speeds of the pair of vertical moving bodies 4 to which the left and right pressure arms 31 and 32 are attached are different from each other so that the tray does not tilt and fall from the horizontal position. Vertical moving body 4
It is necessary that the speed at which the air cylinder 40 for vertically moving the robot moves vertically between the upper stop position and the lower stop position is the same on both the right and left sides.
However, there was a problem with the function of that the guarantee of speed accuracy cannot be guaranteed.

Therefore, as a means for ensuring the synchronization of the left and right vertical movements, a rack 6 is fixed to the vertical moving body 4 and the gear 7 which rotates by meshing with the rack has the same shape on the right and left sides.
It was noted that the vertical movement speed can be converted into the rotation speed and the vertical movements of the left and right pressure arms 31 and 32 can be synchronized by providing the same characteristics. A pair of gears 7 having the same shape, the same size, and the same module are fixed to both ends of the machine shaft 8 and rotatably attached to the base vertical portion 5.

As described above, the left and right vertical moving bodies 4 synchronously move within a range in which a very small angle difference caused by twisting the machine shaft 8 to which the left and right gears 7 are connected allows the stacked trays to move vertically. There is no inclination to collapse the load on the way.
In response to the demand to move the vertical movement of the tray in synchronism with a series of other systems, an air cylinder that can achieve vertical movement reliably and at low cost, and a gear and rack mechanism that can perform highly reliable synchronized movement This system, which can be realized with the and, has a simple configuration that can withstand harsh operating conditions. Therefore, it is possible to establish tray loading and transfer technology that is easy to repair and maintain and has low equipment costs including maintenance service costs. Became. The above description mainly explained the action of loading one sheet at a time, but since it is possible to move the tray vertically while keeping it horizontal, when the tray is supplied from another transport device to the upper position of the uppermost tray. Since trays can be stacked, it has the function of a stacking / loading system.

[0011]

According to the tray stacking / loading system of the present invention, since the vertical displacement of the tray support does not occur as in the conventional case, load collapse trouble does not occur and the trays are smoothly stacked and loaded. There is an effect that can be done. Since the necessary functions could be realized with a simple mechanism configuration, when this system was introduced as equipment, there was an advantage that it could be operated at a low cost including maintenance and maintenance costs, and it was possible to contribute to the establishment of an economical production process. It has great value.

[Brief description of drawings]

FIG. 1 is a front view of a tray stacking / loading system according to an embodiment of the present invention.

FIG. 2 is a side view of a tray stacking / loading system according to an embodiment of the present invention.

FIG. 3 is a front view of a conventional tray stacking / loading system.

FIG. 4 is an enlarged view of a main part of a conventional tray stacking / loading system.

[Explanation of symbols]

1 conveyor 2 trays 4 Vertical moving body 5 base vertical part 6 racks 7 gears 8 axes 21 Stacking tray when in the upper position 30 air cylinders 31 Left pressure arm 32 Right pressure arm 40 air cylinder

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Masao Nakatani             3-56, Nishi-Awaji, Higashiyodogawa-ku, Osaka-shi, Osaka             Sansan Electric Co., Ltd. F term (reference) 3F029 AA08 BA09 CB03 CB15 DA11                 3F030 AB04 EA03 EB01 FA01

Claims (4)

[Claims] 1. A tray stacking / loading system in which trays having small deflections on which test objects are aligned and placed are sandwiched by pressure arms from both sides, and vertical motion is repeated, a pair including pressure arms is provided. A tray stacking system having synchronous movement means for vertically synchronizing the vertical moving bodies of FIG. 2. In a state in which trays with small flexure in which test objects are aligned and placed are stacked, the second tray from the bottom is clamped from both sides by pressure arms and moved upward, The tray loading system in which the trays are left on the conveyor and discharged horizontally, and then the stacking trays are moved downward to load the trays onto the conveyor by repeating the vertical movement of the tray pressing arm, which is equipped with a pressing arm. A tray loading system, characterized in that it has synchronous movement means for vertically moving the pair of vertical moving bodies in synchronization with each other. 3. The synchronous movement means is a synchronous movement means formed by a rack fixed to a vertically movable body which is supported by a vertical portion of a base and is supported by the vertical portion of the base, and a gear which meshes with the rack. 1 or the tray stacking / loading system according to claim 2. 4. The gear constituting the synchronous movement means is a pair of gears connected by the same axle, and is a gear of the same shape, the same size and the same module. Tray stacking and loading system.