CN110745545A

CN110745545A - Clamp suction row and transfer clamp thereof

Info

Publication number: CN110745545A
Application number: CN201911151924.0A
Authority: CN
Inventors: 陈右桃
Original assignee: Taili Guangzhou Mechanical And Electrical Equipment Co Ltd
Current assignee: Taili Guangzhou Mechanical And Electrical Equipment Co Ltd
Priority date: 2019-11-21
Filing date: 2019-11-21
Publication date: 2020-02-04

Abstract

The invention discloses a clamp suction row and a shifting clamp thereof.A suction disc of the clamp suction row is communicated with a negative pressure cavity in a suction disc cavity, so that the suction force of each suction disc is balanced; the bottom plate is further designed in a detachable mode, so that a sucker can be conveniently added to adapt to circuit boards of different sizes; the negative pressure generator is provided with a silencer to reduce noise; the shock absorption device is arranged to avoid crushing the circuit board; the fixture suction row is provided with a first fixture suction row and a second fixture suction row which are adjustable in distance and suitable for circuit boards of different sizes, and a fixed third fixture suction row is arranged to improve the stability of adsorption and grabbing; meanwhile, the first clamp suction row and the third clamp suction row can be further arranged into an installation structure convenient for manual adjustment, so that the applicability of the clamp is improved; a U-shaped photoelectric switch, a metal detection sensor, a diffuse reflection type photoelectric switch, an ultrasonic sensor and a downward detection sensor are arranged; the safety and the accuracy of automatic control of the transfer clamp can be further improved.

Description

Clamp suction row and transfer clamp thereof

Technical Field

The invention belongs to the technical field of circuit board clamps, and particularly relates to a clamp suction row and a transfer clamp thereof.

Background

The shifting clamp is used for grabbing the circuit board to move in the field of circuit board detection; the clamp suction row is arranged on the clamp main body of the transfer clamp and used for sucking the circuit board; the existing clamp suction and transfer clamp has the following defects:

(1) the suction force of each sucker is unbalanced when the existing clamp sucks and discharges.

(2) The existing clamp suction row is inconvenient for additionally arranging suckers, the quantity of the suckers required for circuit boards with different sizes and weights is different, the larger the circuit board is, the larger the weight is, more suckers are adopted for suction, and the more firmness is realized; however, the suction and exhaust of the existing clamp are not convenient for additionally arranging the suction cup.

(3) When the circuit board is taken and placed by the sucking disc, if the circuit board is taken too much, the circuit board is easy to damage; the moving vibration can be generated in the moving process, and the vibration easily causes unstable adsorption so as to generate board falling.

(4) The existing shifting clamp cannot be suitable for circuit boards with different sizes.

(5) The existing transfer clamp is not convenient for accurate control.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides a fixture suction row, and the suction force of each suction cup is balanced.

The invention solves one of the purposes of the invention, and adopts the technical scheme that:

the utility model provides a clamp suction row which characterized in that: comprises a suction cavity, a negative pressure generator and a sucker; a negative pressure cavity is arranged inside the suction cavity; the suckers are arranged on the lower surface of the bottom plate of the suction cavity and communicated with the negative pressure cavity; one side surface of the suction cavity is provided with a negative pressure connecting hole, the negative pressure cavity is communicated with a negative pressure generator through the negative pressure connecting hole, and the negative pressure generator is used for enabling the negative pressure cavity to generate negative pressure.

In the suction row of the fixture in the technical scheme, a negative pressure cavity is arranged inside the suction row cavity; the suckers are arranged on the lower surface of the bottom plate of the suction cavity and communicated with the negative pressure cavity; a negative pressure connecting hole is formed in one side face of the suction cavity, the negative pressure cavity is communicated with a negative pressure generator through the negative pressure connecting hole, and the negative pressure generator is used for enabling the negative pressure cavity to generate negative pressure; the negative pressure cavity generates negative pressure, and the sucking disc generates suction; all the suckers are communicated with the suction and discharge cavity, so that the suction force of each sucker is homogenized, and a more balanced suction effect is achieved; meanwhile, only the bottom plate of the suction cavity is punched, so that the suction disc can be additionally arranged on the suction row of the clamp, and the clamp is convenient and quick.

In some embodiments, the bottom plate of the suction cavity is a detachable bottom plate. So as to be convenient for dismounting the bottom plate, punching and mounting and dismounting the sucker.

In certain embodiments, a muffler is connected to the negative pressure generator. The shell of the negative pressure generator is a machined aluminum piece, and the inner core of the negative pressure generator is a Venturi tube; the muffler type is an Albes AIRBEST high-flow straight-through muffler; the noise can be reduced by arranging the silencer.

In some embodiments, the upper end of the suction and discharge cavity is connected with a damping device, and the clamp suction and discharge is connected with the clamp body through the damping device. The damping device is used for absorbing, discharging, taking and placing products on the clamp for damping compensation, and avoiding crushing the circuit board; simultaneously, in the moving process of the clamp, the damping effect can effectively reduce the plate falling rate. In this application, the anchor clamps main part is the anchor clamps crossbeam, and the anchor clamps suction row is direct or indirect to be installed on the anchor clamps crossbeam.

In some embodiments, the damping device comprises a linear bearing fixing seat, a linear bearing, a guide rod and a return spring; bearing mounting holes are formed in two ends of the linear bearing fixing seat, the linear bearing is fixedly arranged in the bearing mounting holes, one end of the guide rod is connected to the linear bearing, and the other end of the guide rod is connected to the suction and exhaust cavity; the reset spring is sleeved on the guide rod. The reset spring provides damping and resetting force, and in some embodiments, the damping device can be further provided with a spring washer and a locking cushion block, so that the structure is more stable. In some embodiments, other configurations of shock absorbing devices may be provided.

The second object of the present invention is to provide a transfer jig, which comprises any one of the above suction jig rows, has the advantages of the above suction jig rows, and can adjust the distance between the suction jig rows to adapt to circuit boards of different sizes.

The invention solves the second purpose of the invention, and adopts the technical scheme that:

a transfer jig is characterized in that: the clamp comprises a clamp beam, a first clamp suction row, a second clamp suction row, a motor mounting seat, a screw rod, a slide rail and a slide block; the first clamp suction row and the second clamp suction row are any one of the clamp suction rows; the first clamp suction row is fixedly arranged on the lower surface of one end of the clamp beam, and the second clamp suction row is movably and fixedly arranged on the lower surface of the other end of the clamp beam; the motor is fixed on the lower surface of the clamp beam through the motor mounting seat; two ends of the screw rod are rotatably fixed on the lower surface of the clamp beam through bearing mounting seats, and one end of the screw rod is in transmission connection with an output shaft of the motor; the slide rail is arranged in parallel with the screw rod, a transmission nut is arranged on the screw rod, and a slide block is arranged on the slide rail; the second fixture suction row is fixedly connected with the sliding block and the transmission nut, the motor rotates to drive the screw rod to rotate, the screw rod rotates to drive the transmission nut to move, and the transmission nut drives the second fixture suction row to move left and right on the sliding rail and is used for adjusting the distance between the second fixture suction row and the first fixture suction row.

In some embodiments of the technical scheme, the suction row of the second clamp can be respectively connected with the transmission nut and the sliding block to enable the transmission nut and the sliding block to be connected into a whole; the second fixture suction row can also be fixedly connected with one of the transmission nut and the sliding block, and the transmission nut and the sliding block are fixedly connected, so that the three are connected into a whole. When the second clamp suction row is provided with the damping device, the second clamp suction row is connected with the sliding block and the transmission nut through the damping device.

In some embodiments, a third clamp suction row is arranged between the first clamp suction row and the second clamp suction row, and the third clamp suction row is fixedly arranged on the lower surface of the clamp beam.

In some embodiments, two sides of one end of the clamp beam, which is provided with the first clamp suction row and the third clamp suction row, are provided with clamp fixing side sliding grooves; the upper end surface and the lower end surface of the fixture fixing side sliding chute are respectively provided with a T-shaped groove in a concave manner; the upper end face of the clamp fixing side sliding groove is detachably and fixedly connected with the clamp beam through a bolt and a nut, the nut is positioned in the T-shaped sliding groove, and the diameter of the nut is larger than the notch of the T-shaped sliding groove; the first clamp suction row and the third clamp suction row are detachably and fixedly connected with the lower end face of the clamp fixing side sliding groove through bolts and nuts, the nuts are located in the T-shaped sliding grooves, and the diameters of the nuts are larger than the notches of the T-shaped sliding grooves; two ends of the T-shaped sliding groove penetrate through two end faces of the sliding groove on the fixed side of the fixture. The first clamp suction row and the third clamp suction row can be manually adjusted and installed, the distance can be manually adjusted in time, and the use is more convenient.

In some embodiments, a U-shaped photoelectric switch for limiting the suction displacement stroke of the second clamp is arranged on the transfer clamp;

and/or the transfer clamp is provided with a diffuse reflection type photoelectric switch for determining whether the plate falls off when the plate is sucked by the clamp;

and/or a metal detection sensor for judging whether a circuit board or a separation paper is arranged below the clamp is arranged on the transfer clamp;

and/or the shifting clamp is provided with an ultrasonic sensor for measuring distance, so that the suction time of the clamp for sucking, discharging and vacuumizing to generate negative pressure is determined conveniently;

and/or the transfer clamp is provided with a downward-probing sensor for sending a moving stopping signal to prevent the clamp from violently colliding with the plate surface.

The invention has the beneficial effects that: the invention discloses a clamp suction row and a shifting clamp thereof.A suction disc of the clamp suction row is communicated with a negative pressure cavity in a suction disc cavity, so that the suction force of each suction disc is balanced; meanwhile, the bottom plate is further detachably designed, so that a sucker can be conveniently added to adapt to circuit boards of different sizes; the negative pressure generator is provided with a silencer to reduce noise; the shock absorption device is arranged, so that the circuit board is prevented from being damaged by pressing, and the board falling rate is reduced; the fixture suction row is provided with a first fixture suction row and a second fixture suction row, and the distance between the second fixture suction row and the first fixture suction row is adjustable, so that the fixture suction row is suitable for circuit boards with different sizes; further, a fixed third clamp suction row is arranged between the second clamp suction row and the first clamp suction row, so that the stability of adsorption and grabbing is improved; meanwhile, the first clamp suction row and the third clamp suction row can be used for correspondingly grabbing the conventional small circuit board; the suction and discharge position of the second clamp is adjustable, and the second clamp is used for adjusting and adapting to other large circuit boards; meanwhile, the first clamp suction row and the third clamp suction row can be further arranged into an installation structure convenient for manual adjustment, so that the applicability of the clamp is improved; the U-shaped photoelectric switch, the metal detection sensor, the diffuse reflection type photoelectric switch, the ultrasonic sensor and the downward detection sensor are arranged, so that the safety and the accuracy of automatic control of the clamp are improved.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic diagram of a suction row of a fixture according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a suction chamber according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a suction and exhaust apparatus of a clamp with a damping device according to an embodiment of the present invention;

fig. 4 is a schematic perspective view of a transfer jig according to an embodiment of the present invention;

fig. 5 is a schematic top view of a transfer jig according to an embodiment of the present invention;

FIG. 6 is a schematic sectional view A-A of FIG. 5.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

In the description of the present application, it is to be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

As shown in fig. 1 and 2, a clamp suction and exhaust device 1 comprises a suction and exhaust cavity 11, a negative pressure generator 12 and a suction cup 13; a negative pressure cavity 112 is arranged inside the suction cavity 11; the suckers 13 are arranged on the lower surface of the bottom plate 14 of the suction and exhaust cavity body and are communicated with the negative pressure cavity 112; one side surface of the suction cavity 11 is provided with a negative pressure connecting hole 111, the negative pressure cavity 112 is communicated with the negative pressure generator 12 through the negative pressure connecting hole 111, and the negative pressure generator 12 is used for enabling the negative pressure cavity 112 to generate negative pressure.

In the above technical solution, a negative pressure cavity 112 is arranged inside the suction cavity 11; the plurality of suckers 13 are arranged on the lower surface of the bottom plate 14 of the suction cavity 11 and are communicated with the negative pressure cavity 112; a negative pressure connecting hole 111 is formed in one side face of the suction cavity 11, the negative pressure cavity 112 is communicated with the negative pressure generator 12 through the negative pressure connecting hole 111, and the negative pressure generator 12 is used for enabling the negative pressure cavity to generate negative pressure; all the suckers 13 are communicated with the suction and discharge cavity 112, so that the suction force of each sucker 13 is homogenized, and a more balanced suction effect is achieved; meanwhile, only the suction cavity bottom plate 14 needs to be punched, so that a sucker can be additionally arranged on the clamp suction row 1, and the clamp suction row is convenient and quick.

In some embodiments, the bottom plate 14 of the suction cavity 11 is a detachable bottom plate 14. So as to facilitate the disassembly of the bottom plate 14 for punching and the installation of the suction cup 13. When the number of the sucking discs 13 needs to be reduced, the through holes on the bottom plate 14 for mounting the sucking discs 13 can be plugged and sealed by sealing adhesive tapes.

In some embodiments, as shown in fig. 1, a muffler 15 is connected to the negative pressure generator 12. The shell of the negative pressure generator is a machined aluminum piece, and the inner core of the negative pressure generator is a Venturi tube; the muffler type is an Albes AIRBEST high-flow straight-through muffler; the noise can be reduced by arranging the silencer.

In some embodiments, as shown in fig. 3, a damping device 2 is connected to the upper end of the suction and discharge cavity 11, and the fixture suction and discharge tube 1 is connected to the fixture body through the damping device 2. The damping compensation device is used for picking and placing products on the clamp suction row 1 to avoid crushing a circuit board; simultaneously, in the moving process of the clamp, the damping effect can effectively reduce the plate falling rate.

As shown in fig. 3, in some embodiments, the damping device 2 includes a linear bearing fixing seat 21, a linear bearing 22, a guide rod 23, and a return spring 24; bearing mounting holes are formed in two ends of the linear bearing fixing seat 21, the linear bearing 22 is fixedly arranged in the bearing mounting holes, one end of the guide rod 23 is connected to the linear bearing 22, and the other end of the guide rod 23 is connected to the suction cavity 11; the reset spring 23 is sleeved on the guide rod to provide reset force. In some embodiments, a spring washer (not shown) and a locking pad (not shown) may be further disposed on the damping device 2 to make the structure more stable.

As shown in fig. 4-6, another object of the present invention is to provide a transfer jig, which comprises any one of the suction jig rows 1, has the advantages of the suction jig rows 1, and can adjust the distance between the suction jig rows 1 to adapt to circuit boards of different sizes.

As shown in fig. 4-6, a transfer jig comprises a jig cross beam 100, a first jig suction row 10, a second jig suction row 20, a motor 31, a motor mounting seat 32, a screw 33, a slide rail 34, a slide block 35, and a transmission nut 37; the first fixture suction row 10 and the second fixture suction row 20 are the fixture suction row 1 described in any one of the above; the first fixture suction row 10 is fixedly arranged on the lower surface of one end of the fixture cross beam 100, and the second fixture suction row 20 is movably and fixedly arranged on the lower surface of the other end of the fixture cross beam 100; the motor 31 is fixed on the lower surface of the clamp beam 100 through a motor mounting seat 32; both ends of the screw rod 33 are rotatably fixed on the lower surface of the clamp beam 100 through a bearing mounting seat 38, and one end of the screw rod 33 is in transmission connection with an output shaft of the motor 31 (in this embodiment, a coupling 36 is adopted for transmission connection); the slide rail 34 is arranged in parallel with the screw rod 33, the screw rod 33 is provided with a transmission nut 37, and the slide rail 34 is provided with a slide block 35; the second fixture suction row 20 is fixedly connected with a sliding block 35 and a transmission nut 37, the rotation of the motor 31 drives a screw rod 33 to rotate, the screw rod 33 rotates to drive the transmission nut 37 to move, and the transmission nut 37 drives the second fixture suction row 20 to move left and right on a sliding rail 34, so that the distance between the second fixture suction row 20 and the first fixture suction row 10 can be adjusted.

In some embodiments, the second fixture suction row 20 may be connected with the transmission nut 37 and the slider 35 respectively to connect the three into a whole; or the second clamp suction row 20 can be fixedly connected with one of the transmission nut 37 or the slide block 35, and the transmission nut 37 and the slide block 35 are fixedly connected again, so that the connection of the transmission nut 37 and the slide block 35 is integrated. As shown in fig. 3 and 4, when the second fixture suction-exhaust device is provided with the damping device 2, the second fixture suction-exhaust device 20 is connected with the slide block 35 and the transmission nut 37 through the linear bearing fixing seat 21 of the damping device 2.

As shown in fig. 4-6, in some embodiments, a third clamp suction row 30 is disposed between the first clamp suction row 10 and the second clamp suction row 20, and the third clamp suction row 30 is fixedly disposed on the lower surface of the clamp beam 100.

In some embodiments, both sides of one end of the clamp beam 100, where the first clamp suction row 10 and the third clamp suction row 30 are provided, are provided with clamp fixing side sliding grooves 101; the upper end surface and the lower end surface of the fixture fixing side sliding chute 101 are respectively provided with a T-shaped groove in a concave manner; the upper end face of the clamp fixing side sliding groove 101 is detachably and fixedly connected with the clamp beam 100 through a bolt and a nut, the nut is positioned in the T-shaped sliding groove, and the diameter of the nut is larger than the notch of the T-shaped sliding groove; the first clamp suction row 10 and the third clamp suction row 30 are detachably and fixedly connected with the lower end face of the clamp fixing side sliding groove 101 through bolts and nuts, the nuts are located in the T-shaped sliding grooves, and the diameters of the nuts are larger than the notches of the T-shaped sliding grooves; two ends of the T-shaped sliding groove penetrate through two end faces of the sliding groove on the fixed side of the fixture. So that the first and third

jig suction rows

10 and 30 can be manually adjusted and installed; loosening the nuts, namely manually adjusting the distance in time, and screwing the nuts, namely fixing the first fixture suction row 10 and the third fixture suction row 30; more convenient to use.

In some embodiments, the transfer jig is provided with a U-shaped photoelectric switch 102 for limiting the displacement stroke of the suction row 20 of the second jig; in this embodiment, the U-shaped photoelectric switch 102 has two mounting positions located at the right side of the third clamp row 30, and another mounting position located near the end of the clamp beam 100 on the side where the second clamp row 20 is mounted, and the U-shaped photoelectric switch 102 is mounted on the side of the clamp beam 100 (the side away from the module during the assembly of the transfer clamp).

And/or the transfer clamp is provided with a diffuse reflection type photoelectric switch 103 for confirming whether the plate falls off when the clamp sucks the plate; in this embodiment, the diffuse reflection photoelectric switch 103 is mounted on the negative pressure generator of the fixture suction and discharge; as shown in the position of fig. 5.

And/or the shifting clamp is provided with a metal detection sensor 104 for judging whether a circuit board or a piece of paper is arranged below the clamp; after judging whether the circuit board is the circuit board or the paper separation, the subsequent movement of the clamp can be confirmed.

And/or the transfer clamp is provided with an ultrasonic sensor 105 for measuring distance, so that the suction time of the clamp for sucking, discharging and vacuumizing to generate negative pressure is determined conveniently; in this embodiment, the ultrasonic sensor 105 is mounted on the fixture beam 100 at a position between the first fixture suction row 10 and the third fixture suction row 30, and the fixture beam 100 is provided with a mounting hole.

And/or the transfer jig is provided with a downward sensor 106 (not shown) for sending a movement stopping signal to prevent the jig from violently colliding with the plate surface. The downward sensor 106 can be arranged on the linear bearing fixing seat of the clamp suction row through a sheet metal.

The application discloses anchor clamps suction row and move and carry anchor clamps thereof still have and to make the intensive sucking disc use the accessory to reduce, for the advantage that anchor clamps subtract heavy, have obvious promotion effect to the performance enhancement.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a clamp suction row which characterized in that: comprises a suction cavity, a negative pressure generator and a sucker; a negative pressure cavity is arranged inside the suction cavity; the suckers are arranged on the lower surface of the bottom plate of the suction cavity and communicated with the negative pressure cavity; one side surface of the suction cavity is provided with a negative pressure connecting hole, the negative pressure cavity is communicated with a negative pressure generator through the negative pressure connecting hole, and the negative pressure generator is used for enabling the negative pressure cavity to generate negative pressure.

2. The suction device of claim 1, wherein: the bottom plate of the suction cavity is a detachable bottom plate.

3. The suction device of claim 1, wherein: the negative pressure generator is connected with a silencer.

4. The suction device of claim 1, wherein: the upper end of the suction and discharge cavity is connected with a damping device, and the fixture suction and discharge is connected with the fixture main body through the damping device.

5. The suction jig as set forth in claim 4, wherein: the damping device comprises a linear bearing fixing seat, a linear bearing, a guide rod and a return spring; bearing mounting holes are formed in two ends of the linear bearing fixing seat, the linear bearing is fixedly arranged in the bearing mounting holes, one end of the guide rod is connected to the linear bearing, and the other end of the guide rod is connected to the suction and exhaust cavity; the reset spring is sleeved on the guide rod.

6. A transfer jig is characterized in that: the clamp comprises a clamp beam, a first clamp suction row, a second clamp suction row, a motor mounting seat, a screw rod, a slide rail and a slide block; the first and second fixture suction rows are the fixture suction rows of any one of claims 1-5; the first clamp suction row is fixedly arranged on the lower surface of one end of the clamp beam, and the second clamp suction row is movably and fixedly arranged on the lower surface of the other end of the clamp beam; the motor is fixed on the lower surface of the clamp beam through the motor mounting seat; two ends of the screw rod are rotatably fixed on the lower surface of the clamp beam through bearing mounting seats, and one end of the screw rod is in transmission connection with an output shaft of the motor; the slide rail is arranged in parallel with the screw rod, a transmission nut is arranged on the screw rod, and a slide block is arranged on the slide rail; the second fixture suction row is fixedly connected with the sliding block and the transmission nut, the motor rotates to drive the screw rod to rotate, the screw rod rotates to drive the transmission nut to move, and the transmission nut drives the second fixture suction row to move left and right on the sliding rail and is used for adjusting the distance between the second fixture suction row and the first fixture suction row.

7. A transfer jig according to claim 6, wherein: and a third clamp suction row is arranged between the first clamp suction row and the second clamp suction row, and is fixedly arranged on the lower surface of the clamp beam.

8. A transfer jig according to claim 7, wherein: two sides of one end of the clamp beam, which is provided with the first clamp suction row and the third clamp suction row, are provided with clamp fixing side sliding grooves; the upper end surface and the lower end surface of the fixture fixing side sliding chute are respectively provided with a T-shaped groove in a concave manner; the upper end face of the clamp fixing side sliding groove is detachably and fixedly connected with the clamp beam through a bolt and a nut, the nut is positioned in the T-shaped sliding groove, and the diameter of the nut is larger than the notch of the T-shaped sliding groove; the first clamp suction row and the third clamp suction row are detachably and fixedly connected with the lower end face of the clamp fixing side sliding groove through bolts and nuts, the nuts are located in the T-shaped sliding grooves, and the diameters of the nuts are larger than the notches of the T-shaped sliding grooves; two ends of the T-shaped sliding groove penetrate through two end faces of the sliding groove on the fixed side of the fixture.

9. A transfer jig according to claim 6, wherein: the transfer clamp is provided with a U-shaped photoelectric switch for limiting the suction and discharge displacement stroke of the second clamp;