JPH08119424A - Conveyor - Google Patents

Abstract

PURPOSE: To provide a conveyor which can separate adjoining works without using a stopper. CONSTITUTION: A conveyor comprises a chain 19a, with which a sprocket 20 in a single piece structure with rollers 17 in Groups A and C is in engagement, and a chain 19b with which another sprocket 20 in a single piece with rollers 17 in Group B is in engagement. Drive sprockets 22a, 22b in engagement with these chains 19a, 19b are driven by output sprockets 26a, 26b fixed to the output shaft of a single unit motor 25 through chain and speed change sprockets 23a, 23b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conveyor, in which adjacent works are separated from each other.

[0002]

2. Description of the Related Art A conveyor is used to convey a work. In this case, if the works are brought into contact with each other and conveyed by the conveyor, it is not convenient for the next work process or sorting work. In particular, it is inconvenient when a work is conveyed by combining an automatic guided vehicle and a conveyor.

Therefore, a conveyor is provided for separating adjacent works. A conventional conveyor that performs such an operation is shown in FIGS. As shown in the figure, the sprocket 2 and the transmission shaft 3 fixed to the output shaft of the motor 1
The chain 5 is hooked between the sprocket 4 and the sprocket 4, and the roller 8 is rotationally driven via the pulley 6 and the belt 7 which are fixed to the transmission shaft 3. Work 9a, 9b, ...
In the state where the work is continuously conveyed by the roller 8 in the state of contacting with each other, the frontmost work 9a is separated from the other work as follows.

First, the stopper 10a rises and the stopper 1
With the 0b lowered, the work 9 is rotated by the rotation of the roller 8.
a, 9b, ... Are conveyed. Then, when the workpiece 9a hits the stopper 10a and the sensor 11 detects the presence of the workpiece 9a, the stopper 10b is raised, and then the stopper 10a is lowered to move only the workpiece 9a to the right and place it on, for example, an automatic guided vehicle. Next, stopper 1
If the stopper 10b is lowered after raising 0a,
The work 9b hits the stopper 10a and acts in the same manner as described above. After that, the above operation is repeated.

In addition, by connecting two conveyors having different transfer speeds, it is also possible to separate the works to be transferred in a state where adjacent ones are in contact with each other.

[0006]

However, in the case where the work is a corrugated box, there is no gap between the works, so that the stopper cannot be inserted between the works and the work shape is limited, so that the work length is set to the roller pitch. Since the length of the work is limited because it has to be a multiple of, and the roller rotates while being stopped by the stopper, the lower surface of the work is damaged by the roller. On the other hand, if two conveyors having different transport speeds are connected and used, the cost is high although there is no limitation as described above.

Therefore, the present invention has an object to provide a conveyor which solves the above problems.

[0008]

SUMMARY OF THE INVENTION The structure of the present invention to achieve the above object is to arrange a plurality of rollers on a horizontal plane in a fixed direction and to rotatably support the rollers so as to form a straight line connecting end portions of the rollers. In the lower part, a pair of chains are wound around a rotatably supported rotating body, and the front one of the rollers is fixed with a sprocket that meshes with the chain on one end side, and the one on the rear side is fixed. Each sprocket that meshes with the chain on the other end side is fixed, and a pair of drive sprockets that mesh with each chain are individually and rotatably provided so that the rotation speed of the front roller is higher than that of the rear roller. The motor output shaft and a pair of drive sprockets are interlockingly connected, or a plurality of rollers are arranged in a certain direction on a horizontal plane and are rotatably supported. Below the rollers, a pair of transmission shafts extending substantially from the one side to the other side at a substantially right angle to the rollers are rotatably provided, and pulleys are fixed to the respective transmission shafts at positions corresponding to the rollers. A belt is wound between the front side and the pulley of one transmission shaft, and between the rear side and the pulley of the other transmission shaft, and the rotation speed of the front side roller is higher than that of the rear side. It is characterized in that the output shaft of a single motor and a pair of transmission shafts are interlockingly connected so as to be large.

[0009]

In any of the conveyors according to claims 1 and 2, the output shaft of the single motor is individually decelerated to transmit the rotational motion to the pair of chains or the operating shafts having different rotational speeds. Then, the rotational movement is transmitted to the roller via the sprocket or the belt, and the rotational speed of the front roller becomes faster than that of the rear roller. Therefore, the work carried by the rear roller is carried faster by the front roller, and the work is sequentially separated from the succeeding work.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings.

(A) Example 1 The construction of a conveyor according to the present invention is shown in FIGS. A pair of frames 16 and 16 on the left and right sides respectively form a pair of legs 15 and 1
5, a plurality of rollers 17 are rotatably supported between the pair of frames 16 and 16. A pair of chain tensioners 18a serving as a rotating body is provided below the one end of the front and rear rollers 17 to form a frame.
6 is provided so as to be attached, and the chain 19a is wound between a pair of chain tensioners 18a. The rollers 17 are divided into groups A, B, and C in order from the rear side as shown in FIG. 1, and a pair of tensioners 18b is provided below the other end of the rollers 17 of group B by being attached to the other frame 16. The chain 19b is wound around the pair of tensioners 18b. Also, since the chain 19a is long, the chain tensioner 18
a is provided. A sprocket 20 is fixed to one side of the roller 17 for driving the group A and the group C by the chain 19a, and only the group B is connected to the chain A by the chain 19b.
A sprocket 20 is fixed to the other side of the rollers 17 so as to rotate at a higher speed than the rollers 17 of the groups C and C.

As shown in FIG. 5, an operating shaft 21a for driving the chain 19a and an operating shaft 21b for driving the chain 19b are rotatably provided between the pair of frames 16 and are attached to the operating shafts 21a and 21b. Is the chain 19a,
Drive sprockets 22a and 22b meshing with 19b are fixed. In addition, speed change sprockets 23a and 23b having different outer diameters are fixed to the operation shafts 21a and 21b. On the other hand, a stay 24 having a substantially U-shaped cross section is provided below the pair of frames 16 so as to connect them, and a motor 25 is mounted on the stay 24. The output shaft of the motor 25 has an output sprocket 26
a and 26b are fixed, a chain 27a is wound between the output sprocket 26a and the drive sprocket 23a, and the output sprocket 26b and the drive sprocket 23b are
A chain 27b is wound between and.

The operation of such a conveyor will be described. Motor 2
When the output shaft of 5 is rotated, the output sprocket 26a →
Chain 27a → speed sprocket 23a → operation shaft 21
The driving force is transmitted in the order of a-> drive sprocket 22a-> chain 19a to rotate the rollers 17 of the A and C groups having the sprocket 20 that meshes with the chain 19a. Also,
Output sprocket 26b → chain 27b → shift sprocket 23b → operation shaft 21b → drive sprocket 22b
→ The driving force is transmitted in the order of chain 19b and chain 19
Roller 1 of group B having sprocket 20 meshing with b
7 rotates. Since the transmission sprocket 23a has a larger outer diameter than the transmission sprocket 23b, the number of rotations of the roller 17 of the group B is larger than that of the rollers 17 of the group A and C. Therefore, when a plurality of works are brought into contact with each other in the direction of the arrow shown in FIG. 2, the leading work approaches the roller 17 of group B and is carried at high speed, and then again by the roller 17 of group C. The work is conveyed slowly, the leading work is separated from the next succeeding work, and the leading work is placed on, for example, an automatic guided vehicle. If this is detected by, for example, a sensor and the motor 25 is stopped, the succeeding leading work is stopped on the roller 17 of the group C. After the first work is placed on the automatic guided vehicle and the automatic guided vehicle departs, the next automatic guided vehicle enters the station. When the sensor detects this and the motor 25 starts rotating, the second work is placed on the automatic guided vehicle. After that, the succeeding works are conveyed one after another in the same manner as described above. When the length of the work changes, it can be dealt with by changing the mounting position of the sprocket 20 with respect to the roller 17 and changing the number of rollers of the A, B, and C groups.

(B) Second Embodiment Next, a second embodiment of the present invention is shown in FIGS. In this embodiment, the C group of the A, B, and C groups in the first embodiment is removed and only the A and B groups are provided. Is omitted.

(C) Third Embodiment Finally, a third embodiment is shown in FIGS. In this embodiment, the operation shaft 21 that is parallel to the roller in the first embodiment is used.
11a and 21b are arranged at right angles via bearings 32 and 33 on the stay 31 as shown in FIG.
The output shaft of is also arranged at a right angle to the roller 17. Then, without using the chain as in the first embodiment, the operation shaft 21
A pulley 28 is fixed to a position corresponding to the roller 17 of a and 21b, and a circumferential groove 29 having a V-shaped cross section is formed at a position corresponding to the operation shafts 21a and 21b of each roller 17. . A ring belt 30 is hung between the circumferential grooves 29 of the rollers 17 of the A group and the C group and the pulley 28 of the operation shaft 21a in a state of being twisted by 90 °, while the circumference of the rollers 17 of the B group is circled. Groove 29 and operating shaft 21
The ring belt 30 is also hung between the pulley 28 of b.

Next, the operation of such a conveyor will be described. Similarly to the case of the first embodiment, the rotational movement of the motor 25 is transmitted to the operation shafts 21a and 21b, and the operation shaft 21b rotates at a higher speed than the operation shaft 21a. The rotational movement of the operating shaft 21a is transmitted to the rollers 17 of the A and C groups via the pulley 28 and the ring belt 30, while the rotational movement of the operating shaft 21b is similarly transmitted to the roller 17 of the B group. Therefore, A, C
The roller 17 of the group rotates at a certain speed, and the roller 17 of the group B
Rotates faster than that. Therefore, the works are separated from each other as described in the first embodiment. If the length of the work changes,
This can be dealt with by changing the position of the ring belt 30 between the one circumferential groove 29.

[0017]

As can be seen from the above description, according to the conveyors according to claims 1 and 2, adjacent rollers are separated by driving rollers having different rotation speeds by a single motor. Does not need Also,
By converting the sprocket and the like, the difference in the rotational speed of the rollers can be easily changed. Further, even when the length of the work is changed, it can be easily changed only by changing the attachment position of the sprocket or the attachment position of the belt.

[Brief description of drawings]

FIG. 1 is a plan view showing a first embodiment of a conveyor according to the present invention.

FIG. 2 is a front view showing the first embodiment of the conveyor according to the present invention.

FIG. 3 is a right side view showing the first embodiment of the conveyor according to the present invention.

FIG. 4 is a partially enlarged view showing the first embodiment of the conveyor according to the present invention.

FIG. 5 relates to Example 1 of the conveyor according to the present invention, and FIG.
AA arrow view of FIG.

FIG. 6 is a plan view showing a second embodiment of the conveyor according to the present invention.

FIG. 7 is a front view showing a second embodiment of the conveyor according to the present invention.

FIG. 8 is a right side view showing a second embodiment of the conveyor according to the present invention.

FIG. 9 is a plan view showing a third embodiment of the conveyor according to the present invention.

FIG. 10 is a front view showing a third embodiment of the conveyor according to the present invention.

FIG. 11 is a right side view showing a third embodiment of the conveyor according to the present invention.

FIG. 12 is a front view showing a conventional conveyor.

FIG. 13 is a right side view showing a conventional conveyor.

[Explanation of symbols]

 17 ... Roller 18a, 18b ... Chain tensioner 19a, 19b, 27a, 27b ... Chain 20 ... Sprocket 22a, 22b ... Drive sprocket 23a, 23b ... Shift sprocket 25 ... Motor 26a, 26b ... Output sprocket 28 ... Pulley 29 ... Circumferential groove 30 ... Ring belt

Claims (2)

[Claims] 1. A plurality of rollers are arranged in a certain direction on a horizontal plane and are rotatably supported, and a pair of rollers is wound around a rotatably supported rotor below a straight line connecting end portions of the rollers. A chain is provided, and one of the rollers on the front side is fixed with a sprocket that meshes with the chain on one end side, and one on the rear side is fixed with a sprocket that meshes with the chain on the other end side and meshes with each chain. Providing a pair of drive sprockets individually and rotatably,
A conveyor characterized in that an output shaft of a single motor and a pair of drive sprockets are interlockingly connected so that the rotation speed of a front roller is higher than that of a rear roller. 2. A plurality of rollers are arranged in a certain direction on a horizontal plane and rotatably supported, and a pair of transmission shafts extending from one side to the other side of the rollers are rotatably provided below the rollers. Pulleys are provided at positions corresponding to the rollers on the respective transmission shafts, and between the front side of the rollers and the pulley of one transmission shaft, and between the rear side and the pulley of the other transmission shaft. A belt is wound between each of them, and an output shaft of a single motor and a pair of transmission shafts are interlockingly connected so that the rotation speed of the front roller is higher than that of the rear roller. Conveyor.