JPH0585729U - Unloading device - Google Patents

Abstract

(57) [Abstract] [Purpose] To simplify the structure of a device that carries out a conveyed object conveyed by a belt conveyor from a front end of the belt conveyor to a predetermined position. [Constitution] When the conveyed objects 3a, 3b ... Are conveyed in the direction of the arrow G and reach the position I, the conveyed objects 3a are grasped by the grasping members 5, 7 and rotated along the front end of the belt conveyor 16. When the object 3a is rotated to the position K, the transferred object 3a is released, drops to a predetermined position of the transport case 40, and the transferred object 3a is inverted and stored. The next transported object 3b is stopped by the stopper 15. Since the carrying-out operation can be simplified in this way, the structure of the device can be simplified.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an unloading device for unloading an object to be transported (hereinafter referred to as an article) transported from a belt conveyor to a predetermined position of a transportation case whose interior is partitioned, for example.

[0002]

[Prior Art]

 Conventionally, as this type of device, a robot hand device is known which has a gripping part for gripping an article and an arm part for moving the gripping part. Since this device is generally controlled by a computer, its operation is accurate. Moreover, if the program is changed, it is excellent in that it can handle various unloading conditions such as the shape of the goods and the mutual positional relationship between the belt conveyor and the transportation case.

[0003]

[Problems to be solved by the device]

 However, the above-described device is small in number of articles that can be carried out per unit time, and the device itself is expensive and large. For this reason, it is inappropriate to use the above-mentioned robot conveyor when considering the cost and installation space when the carry-out conditions are fixed and a large amount of articles are to be carried out per unit time. The present invention aims to provide a carry-out device having a simple structure and being suitable for such a case.

[0004]

[Means for Solving the Problems]

 The carrying-out device of the present invention includes a first gripping member for gripping an article above the tip of the belt conveyor and a second gripping member facing the first gripping member along the tip of the belt conveyor. It is characterized in that it is rotatably provided so that the object to be conveyed is turned upside down and carried out below the front end of the belt conveyor.

[0005]

According to the carry-out device of the present invention, the first and second gripping members holding the article are carried out by simply rotating the first and second gripping members along the tip of the belt conveyor from above to below the belt conveyor. Since it is possible to simplify the structure of the device, the device itself becomes compact. In addition, since it can be carried out by a simple operation, the amount of carried out per unit time is large.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a main part of the unloading device of the present invention, and the device 2 is arranged on one side of the leading end portion 1a of the conveyor belt 1 of the belt conveyor. The articles 3a, 3b ... Are placed on the upper surface of the conveyor belt 1, and these articles 3a, 3b ... Are conveyed in the arrow G direction. A first gripping member 5 is fixed to the upper surface of the first rotary plate 4, and the tip of the first gripping member 5 is formed in a hook shape and extends above the conveyor belt 1 of the belt conveyor. There is. A second gripping member 7 is fixed to the upper surface of the second rotary plate 6, and the conveyor belt 1 is provided so that the tip end of the second gripping member 7 faces the tip end of the first gripping member 5. Has been extended above. The first rotary plate 4 is rotatably mounted on the drive shaft 9. A cylindrical rotating member 10 is fixed to one side surface of the second rotating plate 6, and the second rotating plate 6 and the rotating member 10 are integrally formed so as to be rotatable about the drive shaft 9 and indicated by an arrow E. , It is mounted so that it can slide in the F direction. A pin 50 is projectingly provided on one side surface of the first rotating plate 4. A pin hole 8 penetrating both side surfaces of the second rotary plate 6 is formed at a position corresponding to the pin 50 of the second rotary plate 6. The tip of the pin 50 is inserted into the pin hole 8, the second rotary plate 6 is slidable with respect to the first rotary plate 4, and the rotary plates 4 and 6 are integrated with the drive shaft 9 as an axis. Are connected so as to be rotatable in the directions of arrows C and D. As a result, the second gripping member 7 slides in the arrow E direction, the first gripping member 5 and the second gripping member 7 grip the leading article 3a, and the article 3a is moved in the arrow C direction. It can be rotated.

Engagement grooves 11a and 11b are formed in the outer peripheral surface of the rotating portion 10, and the tip portion 12a of the ball plunger 12 is engaged with the engagement groove 11a. The tip portion 12a of the ball plunger 12 is a rotatable ball bearing, and is biased forward by a spring provided inside the ball plunger 12. By elastically engaging the tip portion 12a with the engaging groove 11a, the two rotating plates 4, 6 and the rotating portion 10 which are integrated with each other are positioned in the circumferential direction. As will be described later, when the rotating plates 4 and 6 are rotated 180 degrees in the direction of arrow C around the drive shaft 9 by overcoming the elastic force of the ball plunger 12, the tip of the ball plunger 12 is inserted into the engaging groove 11b. 12a is engaged. Further, since the tip portion 12a of the ball plunger 12 is a rotatable ball bearing, there is no problem in sliding the second rotary plate 6 in the directions of arrows E and F.

A pair of upper and lower proximity sensors 13 a and 13 b are provided on one end surface side of the first rotary plate 4. Both lower corners of both rotary plates 4 and 6 are dropped. Therefore, in the state shown in the figure, the proximity sensor 13a is close to the one end surface of the first rotary plate 4, and the front of the proximity sensor 13b is open. The proximity sensor 13a detects that the first and second gripping members 5 and 7 are above the conveyor belt 1 and that the article 3 can be gripped. When both rotary plates 4 and 6 rotate 180 degrees in the direction of arrow C around the drive shaft 9, the other end surface of the first rotary plate 4 approaches the proximity sensor 13b, as indicated by the imaginary line. At this time, the first and second gripping members 5 and 7 that grip the article 3 are rotated and positioned below the belt conveyor 16, and the proximity sensor 13b indicates that the article 3 should be released. Detected by.

A pair of upper and lower oil dampers 14 a and 14 b are provided on one end surface side of the second rotary plate 6. The oil damper 14a is in contact with one end surface of the second rotary plate 6, and the front of the oil damper 14b is open. This oil damper 14b absorbs impact when both rotary plates 4 and 6 rotate in the direction of arrow C, and oil damper 14a rotates both rotary plates 4 and 6 while absorbing impact. It is for stopping. The stopper 15 advances in the direction of arrow E in synchronism with the second grip member 7, engages the tip with the next article 3b following the front article 3a, and stops this article 3b. The stopper 15 prevents the leading article 3a from being gripped by the gripping members 5 and 7 and from dropping the next article 3b from the front end 1a of the conveyor belt 1 during unloading. The spacer 24 is fixed to the drive shaft 9 and controls the sliding width of the rotating portion 10 in the arrow F direction.

The belt conveyor 16 is arranged between the side walls 17 and 33 shown in FIG. 2, and the side wall 18 of the carry-out device 2 is fixed to the side wall 17. A cylindrical rotating portion 19 is fixed to the central portion of the first rotating plate 4, and the outer peripheral surface of the rotating portion 19 is rotatably supported by the side wall 18 via a bearing 20. A bearing 21 is provided on the inner peripheral surface of the rotating portion 19, and the drive shaft 9 is rotatably supported by the bearing 21 and a bearing 23 provided on the side wall 22. A screw hole 25 is formed in the center of the rotating portion 10 fixed to the second rotating plate 6, and a screw groove is formed on the inner peripheral surface of the screw hole 25. A large-diameter screw portion 26 formed in the central portion of the drive shaft 9 is screwed into the screw hole 25. As a result, when the drive shaft 9 rotates, the rotation of the rotating portion 10 is restricted by the ball plunger 12, so that the rotating portion 10, the second rotating plate 6 and the second gripping member 7 move in the directions of the arrows E 1 and F 2. Slide on. When the drive shaft 9 is rotated in the direction of arrow C, the second gripping member 7 slides in the direction of arrow E, and its tip comes into contact with the article 3a, the first gripping member 5 and the second gripping member 7 Thus, the article 3a is gripped. When the drive shaft 9 further rotates, the force that restricts the rotation of the ball plunger 12 that engages with the engagement groove 11a of the rotating portion 10 is overcome, and the first rotary plate 4 and the second rotary plate 6 are indicated by arrows. Rotate in the C direction. When both rotary plates 4 and 6 rotate 180 degrees, the rotation is stopped by the oil damper 14b. As a result, the article 3a is gripped and rotated to below the belt conveyor 16. When the article 3a is released and both rotary plates 4 and 6 are returned to their original positions, the drive shaft 9 is rotated in the direction of arrow D. By this rotation, the second gripping member 7 slides in the direction of the arrow F, the tip end thereof separates from the article 3a, and the article 3a is released. Then, one side of the rotating portion 10 contacts the spacer 24. When the drive shaft 9 further rotates, the first rotation plate 4 and the second rotation plate 6 are overcome by overcoming the force that restricts the rotation of the ball plunger 12 that engages with the engagement groove 11b of the rotation portion 10. Rotates in the direction of arrow D. When both rotary plates 4 and 6 rotate 180 degrees, the oil damper 14a (FIG. 1) stops the rotation.

A stopper 15 is attached to the rod 31 a of the spring-loaded cylinder 31. The stopper 15 advances and retreats in the directions of arrows E and F by the spring-loaded cylinder 31. A cam 27 is fixed to one end of the drive shaft 9. The tip end roller portion 28a of the mechanical valve 28 is in contact with the outer periphery of the cam 27. As will be described later, the spring-equipped cylinder 31 is controlled by the cam 27 and the mechanical valve 28 to move the stopper 15 forward and backward in the directions of arrows E and F in cooperation with the second grip member 7. The guide 51 provided on the other side of the conveyor belt 1 prevents the article 3b from moving in the arrow E direction when the stopper 15 advances in the arrow E direction. A driven pulley 29 is fixed to the tip of one end of the drive shaft 9, and a belt 30 is attached to the driven pulley 29. As shown in FIG. 3, a drive pulley 36 is fixed to the tip of the output shaft 35 of the air actuator 34, a belt 30 is stretched between the drive pulley 36 and the driven pulley 29, and the air actuator 34 is used. The drive shaft 9 is driven. An activation sensor 32a is provided on the side wall 33 of the belt conveyor 16, and an activation sensor 32b is provided on the side wall 22. Transmission holes (not shown) are provided in the first and second rotary plates 4 and 6, and light is transmitted and received between these start sensors 32a and 32b. As a result, the light is blocked when the article 3 arrives at the front end portion 1a of the conveyor belt 1, so that the arrival of the article 3 is detected.

FIG. 4 is a pneumatic circuit diagram of this apparatus, in which compressed air is supplied from the electromagnetic valve 37 to the air actuator 34 and the spring-loaded cylinder 31. Compressed air is supplied to the port P of the electromagnetic valve 37, and the two ports R are open to the atmosphere. The mechanical valve 28 discharges the compressed air in the pipeline to the atmosphere only when the tip portion 28a falls into the groove 27a of the cam 27. When the article 3a arrives and is in a grippable state, the electromagnetic valve 37 switches to the position (1). The port B is connected to the port P, compressed air is supplied to the port IN of the air actuator 34, the drive shaft 9 rotates 180 degrees in the direction of arrow C, and the product 3a is gripped and rotated. Compressed air is also supplied to the cylinder 31 via the check valve 38 and the mechanical valve 28, and the stopper 15 advances in the direction of arrow E to stop the next article 3b. At this time, there is a timing when the tip end portion 28a of the mechanical valve 28 falls into the groove 27a of the cam 27 as the cam 27 rotates in the direction of arrow C. Then, the compressed air to the spring-loaded cylinder 31 is released into the atmosphere, and the stopper 15 returns in the arrow F direction. However, since the tip end portion 28a of the mechanical valve 28 again rises to the outer circumference of the cam 27, compressed air is supplied to the spring-loaded cylinder 31, and the stopper 15 again stops the article 3b to be advanced. Since the gripping of the article 3a is not completed during this period, the next article 3b does not fall from the front end of the belt conveyor.

When it is detected that the rotation of the article 3a is completed, the electromagnetic valve 37 is switched to the position (2). The port A of the electromagnetic valve 37 is connected to the port P, compressed air is supplied to the port OUT of the air actuator 34, the drive shaft 9 rotates 180 degrees in the direction of arrow D, the article 3a is released, and the gripping members 5, 7 are released. Returns to its original position. At this time, the port B is open to the atmosphere, but the check valve 38 maintains the pressure in the spring-loaded cylinder 31, and the stopper 15 keeps the next article 3b stopped. Since the groove portion 27a of the cam 27 rotates in the direction of arrow D from the position of 27b, the mechanical valve 28 maintains the pressure in the pipeline. As the drive shaft 9 rotates, the front end 28a of the mechanical valve 28 falls into the groove 27a of the cam 27 immediately before the gripping members 5 and 7 return to their original positions. It is opened inside, and the stopper 15 returns in the direction of arrow F. Then, the stop of the next article 3b is released. As described above, in this embodiment, the electromagnetic valve 37 is not provided in plural, but is controlled by only one.

Next, the operation of the above configuration will be described. For example, as shown in FIG. 5, this device 2 is disposed on one side of the front end roller 39 of the belt conveyor 16 and extends the first and second gripping members 5 and 7 onto the upper surface of the conveyor belt 1 and stands by. is doing. Below the front end roller 3, a transportation case 40 that moves in the direction of arrow J is arranged. When the articles 3a and 3b placed on the conveyor belt 1 are conveyed in the direction of the arrow G and reach the position I, the articles 3a are grasped by both grasping members 5 and 7 and are rotated along the front end of the belt conveyor 16. Start. At this time, the next article 3b is stopped by the stopper 15. When the article 3a is rotated to the position K on the lower side of the belt conveyor 16, the article 3 is released and drops to a predetermined position of the transportation case 40, and the top and bottom of the article 3a are inverted and stored. Immediately before the gripping members 5 and 7 rotate in the opposite direction and return to the original position, the stopper 15 releases the stop of the next article 3b. When this article 3b is transported to the position I, it is carried out to the transport case 40 by the same operation as described above.

In this way, the first and second gripping members 5 and 7 that grip the article 3a are rotated from above the tip of the belt conveyor 16 to the bottom so that the article 3a is turned upside down and carried out. Since the configuration is adopted, the operation of both gripping members 5 and 7 is simple, and the structure of the device can be simplified. As a result, the device itself can be made compact, and can be mounted on the belt conveyor 16. In addition, since it is possible to carry out by simple operation, it is possible to set a large carry-out amount per unit time.

In the above embodiment, the carrying case 40 is moved. Since the device 2 can be mounted on the belt conveyor 16, the carrying case 40 can be fixed if the belt conveyor 16 can change the position of the front end roller 39 of the belt conveyor 16.

[0017]

[Effect of the device]

 As described above, according to the carry-out device according to the present invention, since the carry-out operation of the article is extremely simple, the structure of the device is simple and the carry-out amount per unit time can be set large. Became possible. This device can also be installed on a belt conveyor, so if this device is installed on a belt conveyor that can change the position of the front end of the belt conveyor, a large amount of articles can be supplied to any place. Is possible.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of a carry-out device according to the present invention.

FIG. 2 is a plan view showing a cross section of a main part of the carry-out device according to the present invention.

3 is a view in the direction of arrow H in FIG.

FIG. 4 is a pneumatic circuit diagram showing an operating system of the carry-out device according to the present invention.

FIG. 5 is a schematic side view showing the operation of the carry-out device according to the present invention.

[Explanation of symbols]

 5 First gripping member 7 Second gripping member 15 Stopper

Claims (1)

[Scope of utility model registration request] 1. A carry-out device, which is arranged near the front end of a belt conveyor and carries out an object to be transferred, which is conveyed from the belt conveyor, to a predetermined position. A first gripping member to be gripped and a second gripping member facing the first gripping member are rotatably provided along the front end of the belt conveyor, and the conveyed object is turned upside down. The carry-out device is configured to carry out below the tip of the.