JPH0325367B2 - - Google Patents

Description

Detailed Description of the Invention [Objective of the Invention] (Industrial Field of Application) The present invention relates to a drive-type roller conveyor, and in particular, the present invention relates to a drive type roller conveyor, and in particular, the present invention relates to a drive-type roller conveyor. The present invention relates to a roller conveyor that stops conveyance in an upstream section when there is an article in the section on the side.

(Prior Art) This type of roller conveyor has a drive belt (propulsion member) disposed below a large number of conveyance rollers arranged in parallel on a main frame, and this drive belt is passed downward to the conveyance rollers in a predetermined section. By pressing the conveyor rollers in a predetermined section, it is possible to selectively drive the conveyance rollers in a predetermined section.

As a mechanism for bringing the drive belt into contact with and separating from the conveyance roller, for example, as shown in Japanese Patent Laid-Open No. 58-59119, an elevating frame can be raised and lowered with respect to a sub-frame disposed below between main frames. The drive belt is brought into pressure contact with the conveyance roller by a belt receiving member provided on the upper surface of the elevating frame. The elevating frame is supported by the subframe by the support frame,
The support frame is constructed by hooking a plurality of claws onto the sub-frame and the lifting frame, using a locking member to prevent the claws from coming off, and by actuating a drive means provided on the support frame itself. The body rotates,
Along with this, the elevating frame is raised and lowered.

(Problems to be Solved by the Invention) In conventional roller conveyors, the mechanism for moving the drive belt toward and away from the conveyance roller uses a complex-shaped support frame with multiple claws. It takes a lot of effort to lock each frame and lifting frame, and the structure is complicated and has problems with ease of assembly. Furthermore, since the drive belt slides on the belt receiving member, there are problems such as running resistance, wear, and noise.

The present invention has been made in view of these points, and provides a mechanism for raising and lowering the raising and lowering frame in a roller conveyor in which the raising and lowering frame equipped with a drive roller is raised and lowered to bring the drive belt into contact with and away from the conveyance roller. The purpose is to simplify the structure and improve ease of assembly.

[Structure of the invention]

(Means for Solving the Problems) The present invention includes a main frame 1 in which a large number of conveying rollers 4 constituting a conveying path 5 are arranged in parallel on a shaft, and a line extending below the conveying rollers 4 between the main frame 1. a sub-frame 12 provided on the sub-frame 12; an elevating frame 15 disposed on the sub-frame 12 so as to be able to rise and fall independently for each predetermined section of the conveyance path 5; A regulating member that is fixed to the frame 12 and has a vertically elongated guide hole 32 that fits into the shaft portion 21 of the drive roller 19 of the elevating frame 15, and that regulates the elevation of the elevating frame 15 within a predetermined range. 31, an endless drive belt 10 disposed along between the drive roller 19 and the conveyance roller 4, and an endless drive belt 10 disposed inside the subframe 12, and the above drive belt 10 disposed on the subframe 12. It is equipped with a plurality of elevating drives 23 that independently raise and lower the elevating frame 15 to bring the drive belt 10 into contact with and away from the conveying roller 4 in a predetermined section of the conveying path.

(Function) In the present invention, by placing the elevating frame 15 on the subframe 12, the subframe 12
The elevating frame 15 can be raised and lowered by the elevating drive body 23 disposed inside the sub-frame 12. It is possible to restrict the vertical movement of the lifting frame 15 within a predetermined range.

Then, when the lift frame 15 is raised by the lift drive body 23, the drive belt 10 is pressed against the conveyance roller 4 in a predetermined section of the conveyance path 5 by the drive roller 19, which is rotatably arranged in parallel on the lift frame 15. Then, the conveyance roller 4 rotates and the conveyed object is conveyed.

(Example) Hereinafter, the configuration of an example of the present invention will be described with reference to the drawings.

In Figures 1 to 4, 1 is a main frame, and this main frame 1 has side frames 2 on both sides.
are arranged in parallel and connected by a plurality of horizontal joining frames 3, and between the side frames 2 on both sides, a large number of conveying rollers 4 are rotatably arranged in parallel on shafts to form a conveying path 5. ing. Note that this conveyance roller 4 has a roller portion 8 rotatably provided on a rotary support shaft 7 having a flat portion 6 on the outer periphery, and the rotary support shaft 7 has an opening at an upper portion (not shown) of the side frame 2. The shaft is inserted into the bearing groove in such a way that it is prevented from rotating.

Conveyance rollers 4 at both ends of the main frame 1
A guide pulley 9 (only the left end is shown in FIG. 1) is rotatably supported between both side frames 2, and an endless drive belt 10 is stretched between both guide pulleys 9. and are arranged along the lower part of each conveyance roller 4. The drive belt 10 has a lower portion of the belt running underneath supported at predetermined intervals by a plurality of guide rollers 11 (only the end side is shown in the figure) which is rotatably supported between both side frames 2. , and the right end (not shown) is stretched over a drive pulley that is rotationally driven by a drive motor, for example, and the drive motor drives the drive belt 1.
0 is rotated clockwise.

A sub-frame 12 is installed above the plurality of horizontal joint frames 3 along the lower part of the conveyance roller 4, and this sub-frame 12 has approximately L-shaped side frames 13 arranged parallel to both sides of the drive belt 10. and its side frame 13
A through groove 14 that opens upward is provided between the center positions of the shafts of the respective transport rollers 4 .

A plurality of elevating frames 15 are arranged on the upper part of the sub-frame 12 for each predetermined section of the conveying path 5 by the conveying roller 4, and each elevating frame 15
is composed of a side plate part 16 disposed on the outside of each side frame 13 of the sub-frame 12, and an upper plate part 17 connecting the both side plate parts 16 at a position facing the lower part of each conveyance roller 4. Each conveyance roller 4 of section 16
Corresponding between the center positions of the axle frame, that is, subframe 1
A bearing groove 18 that opens upward is provided corresponding to each of the two through grooves 14 . Then, between the opposing bearing grooves 18 (between the through grooves 14) of the both side plate portions 16
A drive roller 19 is rotatably arranged in parallel on a shaft rack, and a roller portion 22 is rotatably provided on a shaft portion 21 having a flat portion 20 on the outer periphery. is inserted into the bearing groove 18 in a state where it is prevented from rotating and is freely movable up and down with respect to the through groove 14.

The sub-frames 12 corresponding to positions near both ends of each of the vertical frames 15 include
An elevating drive body 23 for independently elevating and lowering is installed. This lifting/lowering driving body 23 is composed of an air cylinder, and its lower part is fixed to the center of the upper surface of a bracket 26 installed between the both side frames 13 by fixing bolts 25, and has a hose elbow protruding from the lower surface of the bracket 26. The piston rod 24 moves forward and backward in the vertical direction by compressed air supplied to or discharged from the air valve 29 and the air hose 30 by an air valve (not shown), and when the piston rod 24 is operated, the upper plate part of the elevating frame 15 comes into contact with the push plate 24a at the tip of the piston rod 24. It is designed to be raised by pressing 17. In addition, the elevating and lowering driving body 23 may use a telescopic bellows instead of an air cylinder.

Then, when the elevating drive body 23 is operated to raise the elevating frame 15, each drive roller 19 of the elevating frame 15 moves to the drive belt 10 in the corresponding section.
is pushed up and brought into pressure contact with the lower part of the conveyor roller 4 in that section, and while the drive belt 10 is running,
The conveying roller 4 rotates counterclockwise in FIGS. 1, 2, and 4 to convey an item (not shown) to the left in the figures.

Also, the subframe 1 is located at a position corresponding to the second bearing groove 18 from both ends of each lifting frame 15.
2 is attached with a regulating member 31 made of synthetic resin, and as shown in FIG. A fitting protrusion 33 with
is fitted into the through groove 14 from the outside of the side frame 13 of the sub-frame 12, and is attached to the side frame 13 via the bolt 35 passing through the lower attachment hole 34 of the fitting protrusion 33 and the attachment hole 13a of the side frame 13. is closely fixed to the outer surface of the The regulating member 31 causes the shaft portion 21 of the drive roller 19 inserted into the guide hole 32 to move up and down along the guide hole 32, so that the elevating frame 15 moves up and down together with the drive roller 19. The shaft portion 21 of the drive roller 19 inserted into the guide hole 32 comes into contact with the upper and lower edges of the guide hole 32, thereby regulating the vertical movement of the elevating frame 15. ing.

Note that the conveyance rollers 4 at both ends of the main frame 1
is removed from the drive belt 10, but the conveyance rollers 4 at both ends are connected to the adjacent conveyance roller 4 by an endless belt (not shown) and are designed to interlock with this.

In addition, a sensing roller 36 is located between the conveying rollers 4 on the downstream side of each elevating frame 15 in the conveying direction.
The sensing roller 36 is rotatably supported, for example, at the tip of an arm that is rotatably supported on the main frame 1, and the swinging of the arm moves the sensing roller 36 from between the transport rollers 4 to the transport path 5. It is provided so as to protrude and retract upward, and normally the arm is rotationally biased by a spring so as to protrude onto the conveyance path 5. Then, the air valve of the elevating drive body 23 supporting the elevating frame 15 in the section adjacent to the upstream side in the transport direction of the section where the sensing roller 36 is provided is switched and controlled, so that the sensing roller 36 is placed on the transport path 5. In the protruding state, the elevating frame 15 in the section adjacent to the section of the sensing roller 36 on the upstream side in the transport direction is raised by the elevating drive body 23 via the air valve, and the sensing roller 36 is lowered from the transport path 5. In this state, the elevating frame 15 in the section adjacent to the section of the sensing roller 36 on the upstream side in the conveying direction is lowered by the elevating drive body 23 via the air valve.

Then, when assembling the elevating frame 15, by simply placing the elevating frame 15 on the sub-frame 12, the elevating frame 15 can be raised and lowered by the elevating drive body 23 disposed inside the sub-frame 12. At the same time, the regulating member 31 in which the guide hole 32 is fitted to the shaft portion 21 of the drive roller 19 of the elevating frame 15 is fixed to the sub-frame 12,
Elevation and descent of the elevating frame 15 can be regulated within a predetermined range, and assembly can be easily performed.

In the roller conveyor configured in this way, when there is no article on the conveyance path 5 made up of the conveyance rollers 4, all the sensing rollers 36 protrude onto the conveyance path 5, and the elevating frames in all sections are connected via each air valve. 15 is raised by the lifting drive body 23,
The drive belt 10 comes into pressure contact with the conveyor rollers 4 in all sections, and in this state, the drive belt 10
When driven, the conveyance rollers 4 in all sections of the conveyance path 5 rotate counterclockwise. When the article is on the conveyance path 5, the sensing roller 36 in the section where the article is located is pushed down by the weight of the article, and the elevating frame 15 in the section adjacent to the upstream side in the conveyance direction of that section is driven up and down via the air valve. When the article passes through that section, the sensing roller 36 in that section returns to the upper position. , the elevating frame 15 in the section adjacent upstream in the transport direction of that section is raised by the elevating drive body 23 via the air valve, and the drive belt 10 is pressed against the transport roller 4 in the upstream section to drive the transport roller 4. , thereby preventing the items sequentially supplied from the upstream side of the conveyance path 5 from coming close to each other.
It is designed to be conveyed downstream at predetermined intervals.

Further, since the drive roller 19 is used to press the drive belt 10 against the conveyance roller 4, and the friction between the drive belt 10 and the drive roller 19 is small, the running resistance of the drive belt 10 is small, and the noise and the drive belt 10 are reduced. There is also less wear. Furthermore, the drive roller 1
9 is disposed between the center positions of the shafts of the conveyance rollers 4, and enters upward from between the lower surfaces of each conveyance roller 19 when rising and presses against the drive belt 10, thereby preventing contact between the drive belt 10 and the conveyance roller 4. It is possible to improve the rotational force and reliably apply rotational force to the conveying roller 4.

〔Effect of the invention〕

According to the present invention, by placing the elevating frame on the sub-frame, it becomes possible to raise and lower the elevating frame with the elevating drive body disposed inside the sub-frame, and the axis of the driving roller of the elevating frame By fixing a regulating member with a guide hole fitted in the subframe to the subframe, it is possible to restrict the vertical movement of the lifting frame within a predetermined range. In the roller conveyor that is moved toward and away from the conveyance roller, the structure of the mechanism for raising and lowering the lifting frame can be simplified, and the ease of assembly can be improved.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing one embodiment of the roller conveyor of the present invention, FIG. 2 is a sectional view of one section of the conveyance path, FIGS. 3 and 4 are enlarged sectional views of a part thereof, FIG. 5 is a perspective view of the sliding plate. 1... Main frame, 4... Conveyance roller, 5
. . . Conveyance path, 10 .
1...Restriction member, 32...Guide hole.

Claims (1)

[Scope of Claims] 1. A main frame in which a large number of conveyance rollers constituting a conveyance path are arranged in parallel on a shaft, a subframe provided between the main frame along the lower part of the conveyance rollers, and a subframe on the subframe. an elevating frame which is arranged to be able to rise and fall independently in each predetermined section of the conveyance path and has a large number of drive rollers arranged in parallel on a shaft; a regulating member having a guide hole in the form of a vertically elongated hole and regulating the vertical movement of the elevating frame within a predetermined range; and an endless drive belt disposed between the drive roller and the conveyance roller. and a plurality of elevating drive bodies disposed inside the sub-frame and independently elevating and lowering the elevating frame disposed on the sub-frame to bring the drive belt into contact with and away from the conveying roller in a predetermined section of the conveying path. A roller conveyor characterized by comprising: