JPH08119434A - Carrying method and carrier - Google Patents

Abstract

PURPOSE: To shorten the time until accommodating a work in a storage by performing a carriage while inverting the obverse and reverse of the work. CONSTITUTION: A suction pad 4, which has sucked the surface 1a of a work 1, is carried, corresponding to the curve of a cam 10, and the center of the bottom of the suction pad 4 shifts along the track of an alternate long and short dash line C. Moreover, a work holder 22 rotates 180 deg. around the center of gravity g1 so as to rotate the work 1. When the work 22 rotates 180 deg., the suction pad 4 contacts with the work 1. The position P2 of a carry stay 5 at this time is detected with a sensor 14, and the suction of the rear 1b of the work 1 by the suction pad 4 is started. Thereafter, the suction pad 4 is carried horizontally in the direction of an arrow F. As a result, the work 1 separates from the work holder 22. Next, the suction pad 4 is lowered in the direction of an arrow G by an actuator 13, and the work 1 is brought close to a storage 3, and the suction of the work 1 is released, whereupon the reversed work 1 can be accommodated in the storage 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer method used for a work transfer operation or a test, and a transfer device used directly in this transfer method. Electronic parts or members such as semiconductor devices (hereinafter referred to as a work)
When performing the transfer work or the inspection and test of the work, it is necessary to convey the work from the supply unit to the storage unit.

In recent years, there are many cases where an operation of reversing the front and back of a work is required when the work is conveyed from a supply part to a storage part for the purpose of a target work or an inspection or a test. Therefore, in such a case, there is a demand for a transport method capable of performing a reversing operation.

[0003]

2. Description of the Related Art Conventionally, a carrying method for reversing a work while carrying it is carried out by using a carrying device shown in FIG. This transfer device includes a transfer mechanism 27 and a reversing mechanism 28.
And a reversing mechanism raising / lowering actuator (not shown) and a storage unit horizontal movement actuator (not shown).

The transport mechanism 27 has a suction pad 4, a first actuator 27a and a second actuator 27b. The suction pad 4 is moved in the horizontal direction by driving the first actuator 27a, and the work 1 is sucked by the suction pad 4. Then, the suction pad 4 is moved up and down by the second actuator 27b. The reversing mechanism 28 has a motor 28a, a work holder 28b, and a suction mechanism 28c.
The work holder 28b is rotated 180 ° by driving 8a, and the suction mechanism 28c is provided on the upper surface of the work holder 28b.

In the transfer method used in such a transfer apparatus, as shown in FIG. 5B, first, the work 1 supplied to the supply unit 2 is sucked by the suction pad 4. Next, the work 1 is conveyed to the transfer section of the reversing mechanism 28 by the conveying mechanism 27, and the suction pad 4 is lowered by the second actuator 27b of the conveying mechanism 27 to release the suction, whereby the work 1 is transferred to the reversing mechanism 28. Hand over.

Next, the second actuator 2 is arranged so that the work 1 is sucked by the suction mechanism 28c of the reversing mechanism 28 and is retracted from the rotation range R of the work holder 28b.
The suction pad 4 is raised at 7b. Next, after waiting until the suction pad 4 is retracted from the rotation range R of the work holder 28b, the work holder 28b is rotated 180 ° by the motor 28a so as to reverse the front and back of the work 1. As a result, the center of gravity g2 between the work holder 28b and the suction mechanism 28c rotates along the arc P.

Next, the suction by the suction mechanism 28c of the reversing mechanism 28 is released, and the inverted work 1 is stored in the storage portion 3. At this time, in order to surely store the work 1 in the storage unit 3, the vertical position of the reversing mechanism 28 is adjusted by the reversing mechanism lifting actuator, and the horizontal position of the storage unit 3 is adjusted by the storage unit horizontal movement actuator. Is going.

[0008]

However, in the conventional transfer method, since the suction pad 4 is transferred by the first actuator 27a and the rotation of the work holder 28b is independently operated by the motor 28a, the reversal is performed. Since the mechanism 28 requires the motor 28a and the suction mechanism 28c, the reversing mechanism 28 becomes large and the control of the reversing mechanism becomes complicated.

Further, since the rotation of the work holder 28b is started after waiting until the retracting of the suction pad 4 is confirmed from the rotation range R of the work holder 28b, the start of the reversal of the work 1 is delayed and the work holder 28b is sucked. Mechanism 28c
Since the center of gravity g2 of and is rotated in an arc, the reversal time of the work 1 is lengthened and the time until the work 1 is stored in the storage portion 3 is lengthened.

Therefore, the present invention has been made in view of the above problems, and provides a carrying method and a carrying apparatus in which the reversing mechanism is downsized, the control of the reversing mechanism is simplified, and the time until the work is stored in the storage portion is shortened. The purpose is to provide.

[0011]

Means for Solving the Problems The above-mentioned problems are solved by the following constitutions of the present invention. According to a first aspect of the present invention, there is provided a carrying method for carrying a work supplied to a supply unit to a storage unit,
It is characterized in that the work is conveyed while the front and back of the work are reversed.

Further, the invention of claim 2 comprises a single drive source, a transport mechanism for transporting the work by the drive source, and a reversing mechanism for reversing the front and back of the work by the drive source. This is a carrier device.
Further, the invention of claim 3 is a carrying apparatus characterized in that the driving force of the drive source for driving the carrying mechanism is connected to the reversing mechanism or separated from the reversing mechanism.

Further, according to the invention of claim 4, the reversing mechanism has a work holding portion which holds the work with the front and back surfaces of the work sandwiched therebetween. Further, the invention of claim 5 is a transporting device, characterized in that a selection mechanism for selecting whether or not to invert the work is provided.

[0014]

As described above, in the carrying method according to the first aspect of the invention, since the work is carried while the front and back of the work are reversed, it is necessary to perform the carrying operation and the reversing operation separately. do not do. Therefore, no time is required when the work transfer operation is changed to the work reversing operation. Therefore, it is possible to shorten the time until the work is stored in the storage unit.

Further, the transport apparatus according to the invention of claim 2 is
Since a single drive source, a transport mechanism for transporting the work by this drive source, and a reversing mechanism for reversing the front and back of the work by the drive source, it is possible to transport the work while reversing the front and back of the work. It can be carried out and the carrying method of claim 1 can be carried out directly. Further, since the transporting device according to the invention of claim 3 is configured such that the driving force of the drive source for driving the transporting mechanism is connected to the reversing mechanism or separated from the reversing mechanism, the reversing mechanism is used in the work transporting path. The driving force can be connected to the reversing mechanism only while it is necessary for the operation of the mechanism, and the driving force can be separated from the reversing mechanism while not required.

For this reason, the drive motor for the reversing mechanism is not required and the control of the motor is not required, so that the control of the reversing mechanism can be simplified. Further, in the transport apparatus according to the invention of claim 4, since the reversing mechanism is configured to hold the work by sandwiching the front and back surfaces of the work, a suction mechanism or a suction mechanism for holding the work when reversing the work. Does not require a clamp mechanism. Therefore, the reversing mechanism can be downsized.

Further, the transport apparatus according to the invention of claim 5 is
Since the selection mechanism for selecting the presence / absence of the work reversing operation is provided, it is possible to carry the work with the work reversing and to carry the work without the work reversing.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Before describing a carrying method according to an embodiment of the present invention, the structure of a carrying device used directly in this carrying method will be described with reference to FIGS. 1, 3 and 4. This transfer device reverses the work 1 when the work 1 such as a semiconductor device is transferred from the supply unit 2 to the storage unit 3, and the first actuator 11 serving as a single drive source shown in FIG. , A transport mechanism, a reversing mechanism, and a selecting mechanism.

The transfer mechanism transfers the work 1 by the first actuator 11, and as shown in FIG. 1, the suction pad 4, the transfer stay 5, the first cam follower 8,
It has a first cam 10, a second actuator 12, a third actuator 13, and a sensor 14. As shown in FIG. 3, the transport mechanism further includes a first slide guide 6a, a first guide rail 6b, a second slide guide 7a, a second guide rail 7b, and a first actuator shown in FIG. 11 and.

The reversing mechanism reverses the front and back of the work 1 by means of the first actuator 11, and as shown in FIG. 4, the work holder 22 and the third slide guide 19a.
The third guide rail 19b, the housing 20, the swing arm 23, the fourth cam follower 24, the second spring 25, and the second cam 26. The selection mechanism selects whether or not the work 1 is reversed, and as shown in FIG. 5, the second cam follower 9, the first swing arm 15, the first spring 16, the third cam follower 17, and the cam follower are provided. It consists of a guide 18.

As shown in FIG. 1, the suction pad 4 is capable of sucking the work 1 and is supported by the transport stay 5. The support portion 8 a of the first cam follower 8 is fixed to the transport stay 5. The first cam follower 8 has a groove 12 a formed on the second actuator 12, a groove 10 a formed on the first cam 10, and a groove 13 formed on the third actuator 13.
It can be slid in sequence along a.

The second actuator 12 and the third actuator 13 move up and down the grooves 12a and 13a to move up and down the first cam follower 8, the transport stay 5 and the suction pad 4. The groove 10a of the first cam 10 is shown in FIG.
From the left to the right in the middle, in order from the horizontal portion 10b,
It is composed of the inclined portion 10c, the top portion 10d, the inclined portion 10e, and the horizontal portion 10f, and forms a cam curve having the inclined portion 10c, the top portion 10d, and the inclined portion 10e.

This cam curve is a curve configured to move the suction pad 4 along a locus that does not contact the work 1 when the work 1 held by the work holder 22 is reversed. A sensor 14 that detects the position of the transport stay 5 is provided on the lower surface of the first cam 10.

Further, as shown in FIG.
Can be slid vertically by the first slide guide 6a and the first guide rail 6b, and horizontally by the second slide guide 7a and the second guide rail 7b. Further, as shown in FIG. 4, the substantially comb-shaped work holder 22 has a fork-shaped work holding portion 22 a for holding the work 1, and has one end of the second swing arm 23.
It is provided so as to extend coaxially with the axis of the rotating shaft 23b.

The second swing arm 23 is the housing 20.
It is rotatable about a rotating shaft 23b that is mounted on the bearing. The center of gravity g1 (see FIG. 1) of the work holder 22 is located on the axis 23c of the rotary shaft 23b. One end of the second spring 25 is locked to the pin 23a at the other end of the second swing arm 23. The other end of the second spring 25 is locked to the pin 20 a of the housing 20.

The second spring 25 always applies a tensile load downward between the pin 20a of the housing 20 and the pin 23a of the second swing arm 23. The shaft center of the fourth cam follower 24 is fixed to one end of the second swing arm 23 concentrically with the shaft center 22b of the work holder 22. The fourth cam follower 24 is a groove 26 formed in the second cam 26.
slide along a.

On the second swing arm 23, the work holder 22 and the fourth cam follower 24 are provided on the same side with respect to the rotary shaft 23b, and the pin 23a is different from the work holder 22 with respect to the rotary shaft 23b. It's on the other side. The groove 26a includes a horizontal portion 26b, a valley portion 26c, and a horizontal portion 26.
d and a cam curve E (FIG. 1) having a valley portion 26c.
).

This cam curve E moves the center of the rotary shaft 23b of the second swing arm 23 and the center of gravity g of the work holder 22 along the one-dot chain line D in FIG. 1 when the work holder 22 rotates. It is such a curve. The housing 20 is fixed to the front side of the third slide guide 19a. The third slide guide 20 is the third guide rail 19b.
Can be horizontally slid along.

On the upper surface side of the third slide guide 19a,
An L-shaped cam follower guide 18 straddling the elongated hole 21a of the support plate 21 is fixed. The cam follower guide 18 is the third
It is configured to be slidable together with the slide guide 19a. As shown in FIG. 5, the cam follower guide 18 includes
A groove 18a is formed in a hanging portion that hangs on the back side of the third slide guide 19a via the support plate 21. A third cam follower 1 axially attached to the tip of the first swing arm 15.
5 is slidably fitted in the groove 18a.

The base end portion of the first swing arm 15 is pivotally supported by the rotation center shaft 15c fixed to the support plate 21. One end of the first spring 16 is locked to the intermediate portion of the first swing arm 15. First spring 16
The other end of the is locked to the support plate 21. The first spring 16 keeps the first swing arm 15 at each swing end while the first swing arm 15 does not obtain the driving force of the first actuator 11, and the first swing arm 15
Is always pulled downward.

A groove 15a having an opening 15b is formed in the first swing arm 15. The second cam follower 9 enters from the opening 15b of the groove 15a, and the groove 15a
The 2nd cam follower 9 can slide along it. The second cam follower 9 is axially attached to the tip of the first actuator 11. The first actuator 11 is fixed to the second slide guide 7.

Next, a carrying method using the carrying apparatus having such a structure will be described mainly with reference to FIG. First, the work 1 is supplied to the supply unit 2 with the surface 1a exposed. The supply unit 2 is arranged below the second actuator 12, and the first cam follower 8 is arranged in the groove 12 a of the second actuator 12. At this time, the back surface 1b of the work 1 is in contact with the supply unit 2, and the front surface 1a faces the suction pad 4.

Further, the third slide guide 19a (see FIG. 3) is arranged at the left end of the third guide rail 19b (see FIG. 3) in the figure. As a result, the work holding portion 22a of the work holder 22 faces left in the drawing. Further, the horizontal portion 10f of the groove 10a of the first cam 10 is located at the same height as the groove 13a of the third actuator 13.

Next, the driving force of the second actuator 12 slides the first slide guide 6a (see FIG. 3) along the first guide rail 6b (see FIG. 3) in the direction of arrow Z2 in the figure. As a result, the transport stay 5 and the suction pad 4 descend so as to approach the work 1 located in the supply unit 2. Next, the surface 1b of the work 1 is sucked by the suction pad 4. The work 1 attracted to the suction pad 4 by the driving force of the second actuator 12 is lifted in the direction of arrow A (Z1) in the figure so as to move away from the supply unit 2, and the groove 12a of the second actuator 12 and the first cam 10 are moved. Groove 10
The horizontal portions 10b of a have the same height.

Next, the work 1 is conveyed by the driving force of the first actuator 11 (see FIG. 5), the work 1 is reversed during the conveyance, and the work is continued until the first cam follower 8 reaches the third actuator 13. 1 is conveyed. More specifically, the first actuator 11 slides the second slide guide 7a (see FIG. 3) along the second guide rail 7b (see FIG. 3) at a constant speed.

As a result, the first cam follower 8 moves from the groove 12a of the second actuator 12 to the groove 10a of the first cam 10.
The work 1 attracted to the suction pad 4 is transported in the direction of arrow B (X1) in the figure by sliding toward the horizontal portion 10b. When transported to the predetermined position P1, the work 1
Is sandwiched between the work holding portions 22a of the work holder 22, and the work 1 is held by the work holding portion 22b. The position P1 of the transport stay 5 at this time is detected by the sensor 14, and the suction of the work 1 by the suction pad 4 is released.

At this time, the first cam follower 8 slides on the boundary between the horizontal portion 10b of the groove 10a of the first cam 10 and the inclined portion 10c. Further, the work holder 22 is synchronized with the reversing operation of the work holder 22 so that the work holder 22 moves the first actuator 1
It is driven by a driving force of 1. This will be described later for convenience of description. After that, the driving force of the first actuator 11 causes the first cam follower 8 to slide on the inclined portion 10c, the top portion 10d, and the inclined portion 10e of the groove 10a of the first cam 10.

As a result, the suction pad 4 is attached to the first cam 10
Is conveyed in a mountain shape corresponding to the cam curve of, and the center of the lower surface of the suction pad 4 moves along the locus of the one-dot chain line C in the figure. Further, the work holder 22 rotates 180 ° about the center of gravity g1 by the driving force of the first actuator 11, and the work 1 is inverted. The center of gravity g1 moves linearly on the one-dot chain line D, and the axis 22b of the work holder 22 is shown in FIG.
The second cam 26 moves along the locus of the one-dot chain line E corresponding to the cam curve of the second cam. At this time, the work 1 does not come into contact with the suction pad 4.

When the work holder 22 rotates 180 °,
The reversal of the work 1 is completed. At this time, the suction pad 4 is in contact with the work 1. The position P2 of the transport stay 5 at this time is detected by the sensor 14, and the suction of the back surface 1b of the work 1 by the suction pad 4 is started. At this time, the first
The cam follower 8 is an inclined portion 1 of the groove 10 a of the first cam 10.
Slide the boundary between 0e and the horizontal portion 10f. Further, as described later, the drive of the work holder 22 by the first actuator 11 is released.

After that, the suction pad 4 which has sucked the back surface 1b of the work 1 is horizontally conveyed by the first actuator 11 along the arrow F (X1) direction in the figure. As a result, the work 1 is separated from the work holder 22. The first cam follower 8 slides horizontally from the horizontal portion 10f of the groove 10a of the first cam 10 to the groove 13a of the third actuator 13,
The drive of the transport stay 5 by the actuator 11 is released.

Next, the suction pad 4 is lowered by the third actuator 13 in the direction of arrow G (Z2) in the figure, and the work 1 is moved closer to the storage section 3. After that, when the suction of the work piece 1 by the suction holder 4 is released, the work piece 1 is reversed from the state in which the work piece 1 is supplied to the supply section 2, and the reversed work piece 1 can be stored in the storage section 3.

In such a carrying method, the work 1 is turned upside down and the work 1 is carried in a series of flows by the first actuator 11 which is a single drive source, and
The operation is performed at a constant speed without stopping, and both before and after reversal are conveyed by the same suction pad 4, and the work holder 22 inserts and holds the work 1 from the side,
Moreover, since the motor, the suction mechanism, and the clamp mechanism are not required, the work holder 22 can be downsized.

Further, since the control of the motor and the suction mechanism is not required, the control of the work holder 22 can be simplified. Since the movement of the work holder 22 can be performed completely in synchronization with the movement of the suction pad 4 by the first actuator 11, it is possible to prevent the positional displacement due to the transfer of the work holder 22 and the suction pad 4.

There is no need to wait for the rotation of the work holder 22 until it is confirmed that the suction pad 4 is retracted from the rotation range of the work holder 22, and the start of reversing the work 1 is not delayed. Further, since the center of gravity g1 of the work holder 22 is moved linearly, the reversal time of the work 1 can be shortened as compared with the case where the work holder 22 is rotated in an arc shape.

Therefore, it is not necessary to wait for the rotation of the work holder 22, and the reversing time of the work 1 is short, so that the time until the work 1 is stored in the storage portion 3 can be shortened. That is, in this embodiment, as shown in FIG. 2A, the time from the suction of the work 1 from the supply unit 2 to the storage of the work 1 in the storage unit 3 is the transfer time (T1) and the work reversal time (T2). ), Transport time (T3) and descent time (T
4) and the total.

However, in the conventional method described with reference to FIG. 6, as shown in FIG. 2B, the falling time (T1
a) and the evacuation time (T1b) are required, and the work reversal time (T2) of the conventional example is more than the work reversal time (T2) of the present embodiment.
2b) must be taken long. Transport time (T3)
Since the total time of the descent time and the descent time (T4) is almost the same as the conventional adjustment time (T3a), the working time of the work 1 from the supply unit 2 to the storage unit 3 is obviously higher in this embodiment. Can be shortened.

Further, since the third actuator 13 for raising and lowering the suction pad 4 in the Z1 direction or the Z2 direction in the drawing is provided, it is not necessary to adjust the vertical position of the work holder 22. Further, in the figure, the arrow X1 direction or X2
Actuator 11 for conveying the suction pad 4 in the direction
Since the above is provided, it is not necessary to adjust the horizontal position of the storage section 3.

Therefore, the conventional inversion mechanism elevating / lowering actuator and the conventional accommodating section horizontal moving actuator are not required. Next, the method of reversing the work 1 will be specifically described with reference to FIG. Third slide guide 19a
When is horizontally moved along the third guide rail 19b, the housing 18 fixed to the third slide guide 19a is horizontally moved.

As a result, the fourth cam follower 24 fixed to the second swing arm 23 horizontally moves along the horizontal portion 26b, the valley portion 26c, and the horizontal portion 26d of the groove 26a of the second cam 26. At this time, the second swing arm 23
Rotates around the axis 23c of the rotary shaft 23b. Based on this rotation, the work holder 22 rotates 180 ° and the work 1 is inverted.

At this time, the second spring 25 always applies a tensile load downward between the pin 20a of the housing 20 and the pin 23a of the second swing arm 23.
The fourth with respect to the cam curve of the groove 26a in the second cam 26
Smoothly follows the cam follower 24. In particular, when the rotary shaft 23b exceeds the bottom dead center H (at this time, the rotary angle of the rotary shaft 23b is 90 °), the fourth cam follower 24 smoothly rotates toward the rear side I from the rotary shaft 23b. I am assisting.

Next, referring to FIG. 5, the work holder 22
The driving method will be specifically described. First actuator 1
1 is fixed to the second slide guide 7a, and a second cam follower 9 is axially attached to the tip thereof. When the first actuator 11 operates and the second cam follower 9 moves horizontally, the work 1 transfer position (P1 in FIG. 1).
Then, the opening 15b of the groove 15a of the first swing arm 15
Then, the second cam follower 9 is fitted. As a result, the first
The swing arm 15 interlocks with the first actuator 11 and can swing about the rotation center shaft 15c.

At this time, the third slide guide 19 shown in FIG.
The cam follower guide 18 fixed to a is configured so that the third cam follower 17 at the tip of the first swing arm 15 slides. Therefore, the third slide guide 19
a also moves horizontally with the operation of the first actuator 11. The swing of the first swing arm 15 is restricted by the lower end of the cam follower guide 18 and swings within a certain angle.

When the swing end (the transfer position after the work 1 is inverted, P2 in FIG. 1) is reached, the swing of the first swing arm 15 is stopped, and the second cam follower 9 is moved into the groove of the first swing arm 15. It moves away from 15a and moves horizontally to the moving end J by the operation of the first actuator 11. The same procedure is used on the way back. In this way, by driving the first actuator 11, the second cam follower 9 moves horizontally,
The first swing arm 15 swings, and the third slide guide 19a moves horizontally.

The second swing arm 23 horizontally moves while rotating through the housing 20 fixed to the third slide guide 19a. As a result, the work holder 22 fixed to the second swing arm 23 rotates 180 °,
Invert work 1. In such an inversion method, the second
Due to the action of the cam follower 9 and the first swing arm 15, the second cam follower 9 is moved to the first swing arm while synchronizing the driving force of the first actuator 11 only in the middle of the conveying path for the time required for the operation of the reversing mechanism. It is possible to disconnect the second cam follower 9 from the first swing arm 15 after connection with the first swing arm 15 after completion of the reversing operation.

The first spring 16 retains the first swing arm 15 at each swing end regulated by the lower portion of the cam follower guide 18 while the first swing arm 15 does not obtain the driving force of the first actuator 11. It is something that can be done. Further, the position of the second cam follower 9 in FIG. 5 is shifted as shown by the chain double-dashed line 9a, and the second cam follower 9 is moved.
Is not contacted with the first swing arm 15,
It is possible to switch to conveyance of the suction pad 4 which does not require holding of the work holder 22, and the work 1 without reversal can be conveyed by the first actuator 11.

By doing so, it becomes possible to select the reversing operation of the work 1 only by moving the mounting position of the second cam follower 9 without replacing the parts.
Furthermore, since the first actuator 13 has a smaller weight to be driven than the conventional reversing mechanism elevating / lowering drive unit, it is possible to reduce the size.

[0057]

As described above, according to the invention of claim 1,
Since the work is conveyed while reversing the front and back of the work, it is not necessary to separately perform the conveying operation and the reversing operation. Therefore, no time is required when the work transfer operation is changed to the work reversing operation. Therefore, it is possible to shorten the time until the work is stored in the storage unit.

Therefore, the function of the transfer device using this transfer method can be further enhanced, the performance of devices equipped with this transfer device can be improved, and the productivity of works such as electronic parts can be improved. It is an extremely useful means for improving Further, according to the invention of claim 2, since the single drive source, the transport mechanism for transporting the work by the drive source, and the reversing mechanism for reversing the front and back of the work by the drive source, the work It is possible to carry the work while reversing the front and back, and the carrying method of claim 1 can be directly carried out.

According to the third aspect of the invention, the driving force of the drive source for driving the transport mechanism is connected to the reversing mechanism or separated from the reversing mechanism. The driving force can be connected to the reversing mechanism only while it is necessary for the operation of the reversing mechanism, and the driving force can be separated from the reversing mechanism while not required. For this reason, the drive motor for the reversing mechanism is unnecessary and control of the motor is not required.
The control of the reversing mechanism can be simplified.

Further, according to the invention of claim 4, since the reversing mechanism has the structure for holding the work by sandwiching the front and back surfaces of the work, the work is held when the work is reversed. There is no need for a suction mechanism or a clamp mechanism. Therefore, the reversing mechanism can be downsized. Further, according to the invention of claim 5, since the selection mechanism for selecting the presence / absence of the work reversing operation is provided, the work is conveyed with the reversal of the work and the work is conveyed without the reversal of the work. be able to.

[Brief description of drawings]

FIG. 1 is a diagram for explaining a carrying method according to an embodiment of the present invention.

FIG. 2 is a diagram showing a storage time of a work from a supply unit to a competent unit.

FIG. 3 is a perspective view showing a configuration of a transfer device used in the transfer method of FIG.

FIG. 4 is a perspective view for explaining a mechanism for reversing a work.

FIG. 5 is a diagram for explaining a method of driving the work holder.

FIG. 6 is a diagram for explaining a conventional transportation method.

[Explanation of symbols]

 1 Work 2 Supply Part 3 Storage Part 4 Suction Pad 5 Conveying Stay 6a First Slide Guide 6b First Guide Rail 7a Second Slide Guide 7b Second Guide Rail 8 First Cam Follower 9 Second Cam Follower 10 First Cam 11 First Actuator 12 2nd actuator 13 3rd actuator 14 Sensor 15 1st swing arm 16 1st spring 17 3rd cam follower 18 Cam follower guide 19a 3rd slide guide 19b 3rd guide rail 20 Housing 21 Support plate 22 Work holder 23 2nd swing arm 24 4th cam follower 25 2nd spring 26 2nd cam

Claims (5)

[Claims] 1. A transport method for transporting a work supplied to a supply unit to a storage unit, wherein the work is transported while reversing the front and back of the work. 2. A transfer device comprising a single drive source, a transfer mechanism for transferring a work by the drive source, and a reversing mechanism for reversing the front and back of the work by the drive source. . 3. The transport apparatus according to claim 2, wherein the driving force of the drive source for driving the transport mechanism is connected to the reversing mechanism or separated from the reversing mechanism. 4. The transfer device according to claim 2, wherein the reversing mechanism has a work holding portion that holds the work with the front and back surfaces of the work sandwiched therebetween. 5. The transfer apparatus according to claim 2, wherein the transfer mechanism is provided with a selection mechanism for selecting whether or not to reverse the work.