JP2009068975A - Environment testing apparatus and work feeding method of environment testing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an environment testing apparatus capable of sending out a work reaching a predetermined temperature to a testing position at a short interval without extending the pallet feed passage in a temperature tank. <P>SOLUTION: In the environment testing apparatus 1, work feed pallets 2, on which works are placed, are stacked to form a pallet stack 20 and the pallet stack 20 is fed along the pallet feed passage 4 through the temperature tank 3 in this state to allow the respective works placed on the respective work feed pallets 2 to reach a predetermined temperature. When the respective works reach the predetermined temperature, the pallet stack 20 is separated at every work feed pallet 2 by a pallet separation mechanism 9 and the work feed pallets 2 are fed so as to pass a current passing test position B one by one. Since a large number of the works are stagnated in the temperature tank 3 by feeding the works as the pallet stack 20 and brought to a predetermined temperature at the same time, the works reaching the predetermined temperature can be sent out to the current passing test position B at a short interval. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention conveys a workpiece conveyance pallet carrying a workpiece along a conveyance path passing through a temperature vessel in which the temperature and the like are adjusted, and allows the workpiece to reach a predetermined temperature while being conveyed in the temperature vessel, The present invention relates to an environmental test apparatus that performs an environmental test such as energization of the workpiece.

The environmental test apparatus carries an environmental test such as energization by transporting a workpiece such as an electronic board through a temperature bath in which temperature and humidity are adjusted, and allowing the workpiece to reach a predetermined temperature. The workpiece is intermittently fed one by one along the pallet conveyance path passing through the temperature tank while being placed on the workpiece conveyance pallet, and is allowed to reach a predetermined temperature while being conveyed in the temperature tank. . In addition, the power supply test is performed by supplying the power to a predetermined power supply test position on the pallet conveyance path. Such an environmental test apparatus is described in Patent Document 1, for example.
JP-A-9-197000

  In order to raise or cool the workpiece to a predetermined temperature, a predetermined residence time in the temperature bath is required. For this reason, if the timing of intermittent feeding is advanced and the workpiece is sent out to the current-carrying test position at short intervals, in the temperature chamber of each workpiece conveyed along the pallet conveyance path of a certain length in the temperature vessel. There is a problem in that the residence time of the workpiece becomes shorter, and the workpiece cannot be brought to a predetermined temperature while staying in the temperature bath. If the pallet conveyance path in the temperature tank is lengthened, the residence time can be extended. However, if the pallet conveyance path is lengthened, the temperature tank is undesirably enlarged.

  In view of such a point, an object of the present invention is to provide an environmental test apparatus capable of sending a workpiece reaching a predetermined temperature to a test position at a short interval without lengthening the pallet conveyance path in the temperature tank. The object is to propose a method of conveying a workpiece in an environmental test apparatus.

In order to solve the above problems, the work transport method of the environmental test apparatus of the present invention is:
Forming a pallet stack by stacking multiple workpiece pallets carrying workpieces in a vertically separable state,
The pallet laminate is sequentially transported at a constant feed pitch along a pallet transport path that passes through a temperature vessel in which the temperature is adjusted,
While the pallet stack is transported to a predetermined position on the pallet transport path in the temperature tank, the workpieces placed on the work transport pallets of the pallet stack are simultaneously made to reach a predetermined temperature. .

  According to the present invention, since the work transport pallet on which the work is placed is transported as a pallet stack, a large amount of work can be retained in the temperature tank without lengthening the pallet transport path in the temperature tank. Further, a plurality of workpieces can be made to reach a predetermined temperature at the same time. Therefore, the workpiece that has reached the predetermined temperature can be sent to the test position at short intervals. As a result, the throughput of the operation of heating or cooling the workpiece to a predetermined temperature and feeding it to the test position is improved.

In the present invention, in order to perform an environmental test such as energization while the workpiece is placed on the workpiece conveyance pallet, the workpiece conveyance pallet is separated one by one from the pallet laminate conveyed to the predetermined position. take out,
It is desirable to convey the taken workpiece conveying pallet one by one along the pallet conveying path toward the test position.

In this case, the portion of the pallet conveyance path that reaches the predetermined position is defined by the first horizontal guide rail,
A portion of the pallet transport path downstream of the predetermined position is defined by a second horizontal guide rail at a position lower than the first horizontal guide rail;
The pallet stack that has reached the predetermined position by sliding the first horizontal guide rail is placed on a lifting rail waiting at the same height position as the first horizontal guide rail,
After that,
A laminate holding step for holding the workpiece conveyance pallets other than the first workpiece conveyance pallet located at the bottom of the pallet laminate in their height positions;
In this state, the first work transport pallet is separated from the pallet stack by lowering the elevating rail to the same height as the second horizontal guide rail at a position lower than the first horizontal guide rail. A pallet lowering process for lowering and
A pallet feeding step of pushing the first workpiece transfer pallet lowered together with the elevating rail horizontally into the second horizontal guide rail;
A lifting rail raising step for raising the lifting rail to the same height position as the first horizontal guide rail;
A laminated body lowering step of lowering the pallet laminated body held at a predetermined height position after the first work conveyance pallet is separated and placing the pallet laminated body on the lifting rail;
It is preferable that each workpiece transfer pallet of the pallet stack is sent out to the second transfer horizontal guide rail one by one by repeating the above.

  In this way, the pallet stacked body that has slid the first horizontal guide rail is separated one by one from the first workpiece transfer pallet positioned at the bottom of the pallet stacked body, and the second horizontal guide rail is separated. It is sent to the guide rail.

Here, in the stacked body holding step, the second work transport pallet stacked on the first work transport pallet in the stacked body is clamped from the side by a clamp mechanism,
Prior to the laminated body lowering step, the second work transport pallet clamped by the clamp mechanism is supported by a pallet lift from below,
In the stacked body lowering step, it is preferable that after releasing the clamp by the clamp mechanism, the pallet lift is lowered to place the second workpiece transfer pallet on the lift rail.

Next, the present invention is an environmental test apparatus for carrying a workpiece by the above method,
The temperature bath;
The first horizontal guide rail;
The second horizontal guide rail;
A pallet laminate conveying mechanism that sequentially and intermittently conveys the pallet laminate at a constant feed pitch along the first horizontal guide rail;
In the predetermined position, a pallet separating mechanism that separates the pallet stack for each work conveying pallet and feeds the pallet stack to the second horizontal guide rail one by one;
A pallet transport mechanism that intermittently transports the work transport pallet fed to the second horizontal guide rail at a constant feed pitch;
The pallet separating mechanism is
The lifting rail;
The clamping mechanism;
The pallet lift;
And a pusher that pushes the workpiece conveying pallet horizontally from the lifting rail and feeds it onto the second horizontal guide rail.

  In the present invention, in order to perform an energization test with a workpiece placed on the workpiece conveyance pallet, an energization test is performed on each workpiece placed on each workpiece conveyance pallet at a predetermined position on the second horizontal guide rail. It is desirable to have a current test device that performs

  According to the environmental test apparatus and the work transport method of the environmental test apparatus of the present invention, a large amount of work can be retained in the temperature bath without lengthening the pallet transport path in the temperature bath. Further, a plurality of workpieces can be made to reach a predetermined temperature at the same time. Therefore, the workpiece that has reached the predetermined temperature can be sent to the test position at short intervals. As a result, the throughput of the operation of heating or cooling the workpiece to a predetermined temperature and feeding it to the test position is improved.

  Hereinafter, an embodiment of an environmental test apparatus to which the present invention is applied will be described with reference to the drawings.

(overall structure)
FIG. 1 is a schematic longitudinal sectional view schematically showing an environmental test apparatus according to the present embodiment. The environmental test apparatus 1 forms a pallet laminate 20 by stacking a plurality of workpiece transfer pallets 2 on which a workpiece such as an electronic substrate is placed, and passes through the pallet laminate 20 through a temperature bath 3 in which the temperature and humidity are adjusted. Each workpiece placed on each workpiece conveyance pallet 2 is allowed to reach a predetermined temperature while being conveyed to the pallet separation position A of the temperature chamber 3. Thereafter, the workpiece conveyance pallets 2 are separated one by one from the pallet laminate 20 and sent out into the test tank 5, and an energization test is performed by the energization test apparatus 6 disposed in the test tank 5.

  As shown in FIG. 1, each of the temperature vessel 3 and the test vessel 5 has a rectangular parallelepiped shape formed of a heat insulating panel, and is connected in series in this order from the upstream side in the pallet conveying direction indicated by an arrow. . These interiors are maintained at a predetermined temperature state by a temperature control mechanism (not shown) including a cooler and a heater.

  A first horizontal guide rail 7 for transporting the pallet stack 20 to the pallet separating position A and a work transporting pallet 2 on the downstream side of the pallet separating position A are transported to the pallet transporting path 4 one by one. In the second horizontal guide rail 8 and the pallet separation position A, the pallet stacked body 20 conveyed on the first horizontal guide rail 7 is received, separated for each work conveyance pallet 2, and sequentially one by one. A pallet separating mechanism 9 for feeding into the two horizontal guide rails 8 is arranged.

  The first horizontal guide rail 7 is located on the side of the other end plate 3c in the temperature vessel 3 from the outside of one end plate 3a of the temperature vessel 3 through the pallet inlet 3b formed in the one end plate 3a. A pair of rails extending in parallel to each other. The pallet stack 20 placed on the upstream end portion of the first horizontal guide rail 7 is transported while being slid on the first horizontal guide rail 7 by a pallet stack transport mechanism (not shown). In this example, the workpiece conveyance pallet 2 on which workpieces are placed is conveyed in a state of being stacked in four stages.

  The second horizontal guide rail 8 is a pair of rails extending in parallel with the same width as the first horizontal guide rail 7, and is disposed at a position lower than the first horizontal guide rail 7. The test chamber 5 extends from the vicinity of the other end plate 3 c in the temperature chamber 3 through the pallet discharge port 3 d formed in the other end plate 3 c. Each workpiece transport pallet 2 placed on the second horizontal guide rail 8 is transported while being slid on the second horizontal guide rail 8 by a pallet transport mechanism (not shown).

  Here, the energization test apparatus 6 performs an energization test on the workpiece placed on the workpiece transfer pallet 2 at a predetermined energization test position B on the second horizontal guide rail 8 in the test tank 5. It has become. Note that the pallet laminate transport mechanism and the pallet transport mechanism can have the same configuration. Examples of these configurations will be described later.

(Work transfer pallet)
FIG. 2A is a perspective view schematically showing the workpiece conveying pallet from the workpiece loading surface side, and FIG. 2B is a perspective view schematically showing the back surface side. As shown in FIG. 2, the workpiece transfer pallet 2 has a rectangular pallet main body plate 21 having a constant thickness and 4 of the same dimensions standing upright from four corners of the pallet main body plate 21 on the work loading surface 21 a side. A spacer pin 22 is provided. The workpiece is placed on the workpiece loading surface 21a of the pallet main body plate 21 and is positioned and fixed. The four spacer pins 22 have a dimension longer than the height dimension of the positioned and fixed workpiece, and a tapered portion 22a is formed at the tip portion. Four pin holes 23 that can receive the tapered portions 22a of the four spacer pins 22 in a detachable state are formed at the four corners on the back surface 21b side of the pallet body plate 21.

  By stacking a plurality of work transport pallets 2 while fitting the tapered portions 22a of the spacer pins 22 into the pin holes 23, the work transport pallets 2 are stacked so as not to interfere with the work positioned and fixed to the pallet body plate 21. Can do. Further, the plurality of stacked workpiece transfer pallets 2 can be prevented from collapsing during transfer. Furthermore, it is possible to easily separate a plurality of stacked workpiece conveyance pallets 2 in the vertical direction.

(Pallet separation mechanism)
FIG. 3A is a schematic longitudinal sectional view of the pallet separation mechanism, and FIG. 3B is a schematic front view. In either case, the pallet stack 20 in which the workpiece conveyance pallets 2 (1) to (4) are stacked is shown as being transferred from the first horizontal guide rail 7 to the pallet separation mechanism 9.

  As shown in FIG. 3, the pallet separating mechanism 9 includes a lifting rail 11, a clamping mechanism 12, a pallet lift 13 and a pusher 14.

  The elevating rails 11 are a pair of rails extending in parallel with the same width as the first and second horizontal guide rails 8. Each rail is supported by an air cylinder 111 so as to move up and down between a standby position C having the same height as the first horizontal guide rail 7 and a feed position D having the same height as the second horizontal guide rail 8. It has become.

  When the pallet stack 20 is placed on the lifting rail 11 at the standby position C, the clamp mechanism 12 moves the work transport pallet 2 that is second from the bottom of the pallet stack 20 in both the left and right directions perpendicular to the work transport direction. The workpiece conveyance pallets 2 other than the lowest workpiece conveyance pallet 2 are held at their height positions.

  The pallet lift 13 lowers the workpiece conveyance pallet 2 that has been clamped by the clamp mechanism 12 from the clamp position E by the clamp mechanism 12 and places it on the lift rail 11 at the standby position C. The pallet lift 13 has an air cylinder 131 disposed between a pair of rails constituting the elevating rail 11, and is clamped before the clamping by the clamping mechanism 12 is released. The work conveyance pallet 2 is supported from below. Thereafter, when the clamp is released, the work conveyance pallet 2 is lowered.

  When the elevating rail 11 is lowered to the feeding position D, the pusher 14 pushes the single workpiece transfer pallet 2 separated from the stacked state and placed on the elevating rail 11 in the horizontal direction and feeds it to the second horizontal guide rail 8. It is. The configuration of the pusher 14 will be described later.

(Pallet separation operation)
4 and 5 are explanatory diagrams for explaining the steps (a) to (f) of the pallet separating operation for separating each workpiece transport pallet 2 from the stacked pallet stack 20.

  Step (a) in FIG. 4 is an initial state of the pallet separating mechanism 9, and the elevating rail 11 is in the standby position C. The pallet stack 20 that has been transported on the first horizontal guide rail 7 to the pallet separation position A is slid by the pallet stack transport mechanism and placed on the lift rail 11 at the standby position C.

  When the pallet laminate 20 is placed on the lifting rail 11, the clamp mechanism 12 projects the clamp member 121 to clamp the second workpiece transport pallet 2 from both the left and right sides, as shown in step (b) of FIG.

  Next, as shown in step (c) of FIG. 4, the elevating rail 11 is lowered to the feeding position D. As the elevating rail 11 descends, the lowermost workpiece transfer pallet 2 (1) of the pallet stack 20 is separated from the pallet stack 20 by its own weight. And it falls in the state mounted on the raising / lowering rail 11. FIG.

  When the elevating rail 11 arrives at the feeding position D, the pusher 14 protrudes toward the front side in the figure, and pushes the work conveying pallet 2 (1) horizontally from the upstream side to the downstream side in the pallet conveying direction. Here, since the feed position D is at the same height as the second horizontal guide rail 8, the workpiece transfer pallet 2 (1) slides and is fed to the second horizontal guide rail 8. Thereafter, the workpiece transfer pallet 2 (1) is transferred through the energization test position B by the pallet transfer mechanism.

  When the feeding of the workpiece transfer pallet 2 (1) to the second horizontal guide rail 8 is completed, the pallet lift 13 is raised to the clamp position E as shown in step (d) of FIG. Further, the elevating rail 11 is raised to the standby position C.

  Next, as shown in step (e) of FIG. 5, the support of the workpiece transfer pallet 2 (2) by the clamp mechanism 12 is released, and the workpiece transfer pallet 2 (2) is supported from below by the pallet lift 13. become. From this state, the pallet lift 13 is lowered, and the second workpiece transfer pallet 2 (2) is placed on the lifting rail 11 at the standby position C as shown in step (f) of FIG. Evacuate until.

  Here, step (f) in FIG. 5 is a state in which the pallet laminate 20 in a state where the number of stacked sheets is reduced by 1 is placed on the lifting rail 11. That is, except for the number of stacked layers, the state is the same as the initial state shown in step (a) of FIG. Accordingly, the operations of steps (b) and (c) in FIG. 4 are continuously performed, so that the workpiece transfer pallet 2 (2) is sent out to the second horizontal guide rail 8. Further, the operation returns to the same state as the initial state by performing the operations of steps (d) to (f) in FIG. These operations are repeated until the work transport pallet 2 (4) stacked on top is sent to the second horizontal guide rail 8.

(Pusher)
Next, the configuration of the pusher 14 will be described with reference to FIGS. FIG. 6 is a schematic partial plan view of the pusher.

  As shown in FIGS. 1 and 6, the pusher 14 has an air cylinder 30 disposed outside one end plate 3 a of the temperature chamber 3, and a temperature passing through the one end plate 3 a from the air cylinder 30. A piston rod 31 extending in the tank 3 in parallel with the first horizontal guide rail 7, an expansion / contraction mechanism 32 configured on the distal end side of the piston rod 31, and an extrusion rod attached to the expansion / contraction mechanism 32 33. All of the air cylinder 30, the piston rod 31, the telescopic mechanism 32, and the pushing rod 33 are arranged directly below the first horizontal guide rail 7. Further, it is disposed between the pair of first horizontal guide rails 7.

  As shown in FIG. 6, the expansion / contraction mechanism 32 extends in the expansion / contraction direction of the piston rod 31 and is fixed to a position where it engages with the pinion 320. The fixed rack 321 is disposed on the opposite side of the pinion 320 and the movable rack 322 meshes with the pinion 320. The movable rack 322 is attached to a movable member 324 supported so as to be movable upstream and downstream in the pallet conveying direction along a pair of guide rails 323 extending in parallel around the piston rod 31. The piston rod 31 is supported so as to be movable along the expansion / contraction direction. A pair of push rods 33 extending in parallel toward the downstream side are attached to the moving member 324.

  The fixed rack 321 has a length dimension including a range (stroke L) in which the pinion 320 moves when the piston rod 31 expands and contracts, and meshes with the pinion 320 in the entire range in which the pinion 320 moves. . The moving rack 322 also has the same length as the fixed rack 321 and moves while meshing with the pinion 320 in the entire range in which the pinion 320 moves.

  FIG. 7 is an explanatory diagram for explaining the feeding operation of the work transport pallet 2 by the pusher 14. As shown in FIG. 7A, in the initial state in which the piston rod 31 is most contracted, the pinion 320 is engaged with the most upstream tooth portion of the fixed rack 321. Further, the movable rack 322 is located on the upstream side of the fixed rack 321, and the pinion 320 is engaged with the most downstream tooth portion of the movable rack 322. The distal end portion of the extrusion rod 33 is positioned in the immediate vicinity of the upstream side of the workpiece conveyance pallet 2 to be extruded.

  When the piston rod 31 extends, the pinion 320 meshes with the fixed rack 321 and rotates. By this rotation, as shown in FIG. 7B, the movable rack 322 engaged with the pinion 320 moves to the downstream side. Further, the movement rack 322 moves so that the tip portion of the pushing rod 33 comes into contact with the upstream side 21c side of the pallet body plate 21 of the workpiece conveyance pallet 2 and slides the workpiece conveyance pallet 2 downstream.

  When the piston rod 31 extends the most, the pinion 320 is engaged with the downstream tooth portion of the fixed rack 321 as shown in FIG. Further, the movable rack 322 has moved to the downstream side of the fixed rack 321, and the pinion 320 is in a state of being engaged with the most upstream tooth portion of the movable rack 322.

  As a result, in this example, the movable rack 322 moves with the stroke 2L which is double the stroke L of the piston rod 31.

(Pallet transport mechanism)
An example of the pallet transport mechanism will be described with reference to FIG. FIG. 8A shows a state in which the work transport pallet 2 is stopped on the first horizontal guide rail 7, and FIG. 8B shows a state in which the work transport pallet 2 is transported collectively. Note that the pallet stack transport mechanism can have the same configuration as the pallet transport mechanism.

  First, the workpiece conveying pallet 2 is mounted on a pair of first horizontal guide rails 7 at both ends in the longitudinal direction. Engaging protrusions 43 extending in the vertical direction from the workpiece loading surface 21 a of the pallet main body plate 21 are attached to both end portions on the surface side of the workpiece conveying pallet 2.

  The pallet transport mechanism includes a pair of transport shafts 41 provided outside the pair of first horizontal guide rails 7, and bearing members that support the transport shaft 41 so as to be slidable in the front-rear direction and to be rotatable about its central axis. 42, a feed air cylinder (not shown) for reciprocating the transport shaft 41 in the front-rear direction, and a left and right rotary air cylinder (not shown) for rotating the transport shaft 41. A plurality of feed pins 43 are attached to the transport shaft 41 at the same pitch.

  The pallet transport mechanism rotates the transport shaft 41 by a predetermined angle so that each feed pin 43 falls horizontally inside the first horizontal guide rail 7, and the feed pin 43 engages with the engagement protrusion 43 of the work transport pallet 2. Combine. In this state, the workpiece conveying pallet 2 is conveyed by one pitch by feeding the conveying shaft 41 forward by one pitch in the arrow direction. After the workpiece conveying pallet 2 is conveyed, the pallet conveying mechanism rotates the conveying shaft 41 to release the engagement between the feed pin 43 and the engaging protrusion 43 and return the conveying shaft 41 by one pitch. By repeating such an operation, the workpiece conveying pallets 2 on the first horizontal guide rail 7 are intermittently and collectively conveyed by one pitch.

(Effect of this form)
According to this example, since the workpiece conveyance pallet 2 on which workpieces are placed is conveyed as the pallet laminate 20, a large amount of workpieces can be transferred into the temperature vessel 3 without increasing the length of the first horizontal guide rail 7 in the temperature vessel 3. Can be retained. Further, a plurality of workpieces can be made to reach a predetermined temperature at the same time. Therefore, the workpiece that has reached the predetermined temperature can be sent to the energization test position B at short intervals. As a result, the throughput of the operation of heating or cooling the work to a predetermined temperature and feeding it to the energization test position B is improved.

  Further, according to the present example, the pallet stack 20 that has been transported along the first horizontal guide rail 7 is separated by the lifting rail 11, the clamp mechanism 12, the pallet lift 13 and the pusher 14, and the lowest workpiece transport pallet. 2 (1) is fed into the second horizontal guide rail 8 one by one in order. As a result, since the workpiece conveyance pallet 2 is conveyed one by one after the workpiece has reached a predetermined temperature, an energization test can be performed with the workpiece placed on the workpiece conveyance pallet 2.

(Other embodiments)
In the environmental test apparatus 1 described above, the temperature tank 3 and the test tank 5 are arranged in series. However, the temperature tank 3 also serves as the test tank 5 by arranging the energization test apparatus 6 in the temperature tank 3. be able to. In this case, the energization test position B is on the second horizontal guide rail 8, and the energization test apparatus 6 is arranged along the second horizontal guide rail 8.

  In the above example, the work transport pallet 2 is transported in four stages, but the number of stages is not limited to this.

It is the schematic longitudinal cross-sectional view which showed typically the environmental test apparatus which concerns on this Embodiment. (a) is the perspective view which showed typically the workpiece conveyance pallet from the workpiece loading surface side, (b) is the perspective view which showed typically from the back surface side. It is the side view and front view of a pallet separation mechanism, and shows the state by which the workpiece conveyance pallet group is delivered to the pallet separation mechanism. It is explanatory drawing for demonstrating the pallet separation operation | movement which isolate | separates each workpiece conveyance pallet from the workpiece | work conveyance pallet group of a lamination | stacking state. It is explanatory drawing for demonstrating the pallet separation operation | movement which isolate | separates each workpiece conveyance pallet from the workpiece | work conveyance pallet group of a lamination | stacking state. It is a schematic plan view of a pusher. It is explanatory drawing for demonstrating the delivery operation | movement of the workpiece conveyance pallet by a pusher. It is explanatory drawing which shows the example of a pallet conveyance mechanism, (a) is the state which the workpiece conveyance pallet has stopped on the conveyance path, (b) is the state in which a workpiece conveyance pallet is conveyed collectively.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Environmental test apparatus 2, 2 (1), 2 (2), 2 (3), 2 (4) Work conveyance pallet 3 Temperature tank 4 Pallet conveyance path 5 Test tank 6 Current test apparatus 7 1st horizontal guide rail 8 1st 2 Horizontal guide rail 9 Pallet separating mechanism 11 Lifting rail 12 Clamping mechanism 13 Pallet lift 14 Pusher 20 Pallet laminate 21 Pallet body plate 21a Workpiece loading surface 22 Spacer pin 23 Pin holes 30, 111, 131 Air cylinder 31 Piston rod 32 Extending mechanism 33 Extrusion rod 41 Conveying shaft 42 Bearing member 43 Engaging protrusion 121 Clamp member 320 Pinion 321 Fixed rack 322 Moving rack 323 Guide rail 324 Moving member A Pallet separation position B Energization test position C Standby position D Feeding position E Supporting position L Pusher Stroke

Claims (6)

Forming a pallet stack by stacking multiple workpiece pallets carrying workpieces in a vertically separable state,
The pallet laminate is sequentially transported at a constant feed pitch along a pallet transport path that passes through a temperature vessel in which the temperature is adjusted,
While the pallet stack is transported to a predetermined position on the pallet transport path in the temperature tank, the workpieces placed on the work transport pallets of the pallet stack are simultaneously made to reach a predetermined temperature. A work transfer method for environmental test equipment. In the workpiece conveyance method of the environmental test apparatus according to claim 1,
Separating and taking out the workpiece conveying pallets one by one from the pallet stack conveyed to the predetermined position,
A work transport method for an environmental test apparatus, wherein the taken work transport pallet is transported one by one along the pallet transport path toward a test position. In the workpiece conveyance method of the environmental test apparatus according to claim 2,
A portion of the pallet conveyance path that reaches the predetermined position is defined by a first horizontal guide rail;
A portion of the pallet transport path downstream of the predetermined position is defined by a second horizontal guide rail at a position lower than the first horizontal guide rail;
The pallet stack that has reached the predetermined position by sliding the first horizontal guide rail is placed on a lifting rail waiting at the same height position as the first horizontal guide rail,
After that,
A laminate holding step for holding the workpiece conveyance pallets other than the first workpiece conveyance pallet located at the bottom of the pallet laminate in their height positions;
In this state, the first work transport pallet is separated from the pallet stack by lowering the elevating rail to the same height as the second horizontal guide rail at a position lower than the first horizontal guide rail. A pallet lowering process for lowering and
A pallet feeding step of pushing the first workpiece transfer pallet lowered together with the elevating rail horizontally into the second horizontal guide rail;
A lifting rail raising step for raising the lifting rail to the same height position as the first horizontal guide rail;
A laminated body lowering step of lowering the pallet laminated body held at a predetermined height position after the first work conveyance pallet is separated and placing the pallet laminated body on the lifting rail;
By repeating the above, each work transport pallet of the pallet stack is sent one by one to the second transport horizontal guide rail. In the work conveyance method of the environmental test apparatus of Claim 3,
In the stacked body holding step, the second work transport pallet stacked on the first work transport pallet in the stacked body is clamped from the side by a clamp mechanism,
Prior to the laminated body lowering step, the second work transport pallet clamped by the clamp mechanism is supported by a pallet lift from below,
In the laminate lowering step, the work transport method of the environmental test apparatus is characterized in that after releasing the clamp by the clamp mechanism, the pallet lift is lowered and the second work transport pallet is placed on the lift rail. An environmental test apparatus for carrying a workpiece by the method according to claim 4,
The temperature bath;
The first horizontal guide rail;
The second horizontal guide rail;
A pallet laminate transport mechanism that sequentially and intermittently transports the pallet laminate at a constant feed pitch along the first horizontal guide rail;
In the predetermined position, a pallet separating mechanism that separates the pallet stack for each work conveyance pallet and feeds the pallet stack to the second horizontal guide rail one by one;
A pallet transport mechanism that intermittently transports the work transport pallet fed to the second horizontal guide rail at a constant feed pitch;
The pallet separating mechanism is
The lifting rail;
The clamping mechanism;
The pallet lift;
An environmental test apparatus, comprising: a pusher that pushes the workpiece conveying pallet horizontally from the lifting rail and feeds it onto the second horizontal guide rail. In the environmental test apparatus described in claim 5,
An environmental test apparatus comprising an energization test apparatus that performs an energization test on each workpiece placed on each workpiece conveyance pallet at a predetermined position on the second horizontal guide rail.

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