JPH07277434A - Accumulation conveyor - Google Patents

Abstract

PURPOSE:To provide an accumulation conveyor simplified in structure and facilitated in assembly and maintenance by arranging a roller, a driving wheel, an actuator and an engagement means in the state where they are aligned on a roller shaft. CONSTITUTION:A diaphragm main body 72 extends and energized a slide member 34 toward the right side when. high pressure air is supplied to the diaphragm main body 72 through a piping 73. Consequently, a roller 30 is pressurized to the side of a driving wheel 40, teeth 52 of a toothed pad 51 are engaged with each other, the roller 30 and the driving wheel 40 are made to roll integrally, and an article on the roller can be transported. In the case when high pressure air is not supplied to the diaphragm main body 72, as a coil spring 61 energizes the roller 30 in a direction to apart from the driving wheel 40, the roller 30 is displaced to the left side. As engagement of the teeth 52 of the toothed pad 51 with each other is released, the roller 30 can freely rotate or stop.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an accumulation conveyor capable of holding conveyed articles in place on the conveyor. More specifically, the accumulation conveyor can be easily manufactured and assembled and can be easily maintained. The present invention relates to an accumulation conveyor improved so that work can be performed.

[0002]

2. Description of the Related Art Conventionally, the rotational force of a rotational power source such as a motor is transmitted to individual rollers via a belt, a chain or the like to drive and rotate the rollers so that they are placed on these rollers. Driven roller conveyors have been used to transport such articles. The drive roller conveyor includes a so-called accumulation conveyor in which the articles to be conveyed are stopped at appropriate positions on the roller conveyor so that the articles can be continuously arranged and stopped. In this accumulation conveyor, it is necessary to drive individual rollers to rotate or stop rotation, so that a clutch or the like is provided between the rollers and the drive shaft to positively transmit the rotational force, or For example, a type that cuts off this transmission is frictionally engaged with the roller and the drive shaft, and when the roller cannot rotate due to the stop of the article being conveyed, the roller slips with respect to the drive shaft and the drive shaft idles. The ones that are designed to do so are used.

As an example of the former case, Jitsuko Sho 30-30242.
In the drive roller conveyor disclosed in Japanese Patent Laid-Open Publication No. JP-A-2003-264, a roller shaft hung between a pair of parallel frames extending in the longitudinal direction is divided into two parts, one of which is a drive shaft and the other of which is a fixed shaft, and each frame is cantilevered. At the same time, the rollers are hung on both shafts and fitted externally so that they can rotate freely.
A clutch member, which is slidable in the axial direction but is prevented from rotating relative to the roller, is fitted into the inside of the roller, and the clutch member is attached to the rotary shaft and the fixed shaft. Of the clutch member and by selectively sliding the clutch member in the axial direction by high pressure air supplied through an air hole formed in the fixed shaft, The roller is driven and rotated when it comes into contact with the shaft end of the drive shaft, and the rotation of the roller is stopped when it comes into contact with the shaft end of the fixed shaft.

In addition, as an example of the latter, the actual fairness 4-112.
In the drive roller conveyor disclosed in Japanese Patent Publication No. 5, a roller shaft is rotatably and axially slidably fitted onto a roller shaft that is stretched between a pair of parallel frames extending in the longitudinal direction, and A passive chain wheel frictionally engaged with the end surface of the roller is rotatably fitted on one side, and a biasing means made of a spring for pressing the roller toward the passive chain wheel is provided on the other side. There is. As a result, the roller frictionally engages with the passive chain wheel connected to the rotational power source by a chain and is driven to rotate, but when the conveyed article is stopped and the rotation of the roller is forcibly stopped, Even if the passive chain wheel rotates due to slippage at the frictional engagement portion, the roller is prevented from rotating.

[0005]

However, in the drive roller conveyor disclosed in Japanese Utility Model Publication No. 60-30242, the roller shaft is divided into two parts, one of which is the drive shaft and the other of which is the fixed shaft. It is necessary to fit the clutch member inside the roller body slidably in the axial direction and to keep the roller member and the clutch member airtight in order to slide the clutch member in the axial direction with high pressure air. , Its structure is very complicated. As a result, this drive roller conveyor has a problem of extremely poor maintainability.

In the drive roller conveyor disclosed in Japanese Utility Model Publication No. 4-1125, the adjustment of the urging force for pressing the roller against the passive chain wheel is performed between the spring as the urging means and the frame. It is said that the color and the thickness of the washer are changed. This makes it necessary to remove the roller shaft from the frame in order to make adjustments.
Due to the complicated structure, there are problems that adjustment is difficult and maintainability is extremely poor.

Therefore, the present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an accumulation conveyor which has a simple structure and which can be easily assembled and maintained.

[0008]

An object of the present invention is to provide a roller shaft supported by a frame, a roller rotatably supported by the roller shaft and movable in the axial direction, and one end surface of the roller. Side is rotatably supported by the roller shaft, and the end face of the drive wheel is in contact with the end face of the roller. The drive wheel is provided on the end face on the side where the drive wheel and the roller contact each other. Engagement means for transmittingly engaging, energizing means interposed between the roller and the drive wheel to constantly energize the roller in a direction away from the drive wheel, and the other of the rollers An actuator that is supported by the roller shaft on the end face side thereof and that can press the roller against the drive wheel against the urging force of the urging means; And a rotary drive source for rotationally driving the drive wheel, wherein the roller, the drive wheel, the actuator, and the engaging means are arranged in a line on the roller shaft. It can be achieved by a conveyor.

[0009]

In the above-mentioned accumulation conveyor of the present invention, when the actuator presses the roller against the drive wheel against the urging force of the urging means, the engagement between the end surface where the roller and the drive wheel contact each other is provided. The means are engaged. As a result, the roller rotates integrally with the drive wheel that is rotationally engaged with the drive wheel and is rotationally driven by the rotary drive source, and the article placed on the roller can be conveyed. On the other hand, when the actuator does not press the roller against the drive wheel,
The biasing means biases the roller away from the drive wheel so that the roller is free to rotate or stop relative to the drive wheel. This allows the articles on the rollers to move or stop freely so that the articles can be dammed at some point on the conveyor. Further, since the roller, the drive wheel, the actuator, the biasing means, and the engaging means are provided in a so-called exposed state in which they are arranged on the roller shaft, the structure is extremely simple, and they can be easily manufactured and assembled. Further, since the engaging means for engaging the roller and the drive wheel in the rotational direction is provided on the end surface where the roller and the drive roller are in contact with each other, the degree of engagement between the both can be easily adjusted and maintenance can be easily performed. it can.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of an accumulation conveyor according to the present invention will be described in detail below with reference to the accompanying drawings. Here, FIG. 1 is a sectional view showing a state in which the rollers are rotationally driven in one embodiment of the accumulation conveyor according to the present invention, FIG. 2 is a sectional view showing a state in which the rollers shown in FIG. 1 are not rotationally driven, and FIG. FIG. 4 is an overall side view schematically showing the accumulation conveyor shown in FIGS. 1 and 2, and FIG. 4 is an enlarged sectional view of an essential part of another embodiment of the accumulation conveyor according to the present invention.

(Embodiment 1) As shown in FIG. 3 as a side view, the accumulation conveyor 100 of the present embodiment 1
Is a frame 10 extending in the transport direction and the frame 1
Drive motor 1 attached to the lower side of 0, and an endless drive belt 3 that engages with an output pulley 2 of the drive motor 1.
And a plurality of sheaves 4 for guiding the drive belt 3 and a plurality of sheaves 4 for placing and transporting a transported object 5 arranged on the upper edge of the frame 10 so as to extend in a direction orthogonal to the transport direction. A roller 30 is provided.

As shown in a sectional view in FIG. 1, the accumulation conveyor 100 of this embodiment has a roller shaft 20 supported by a frame 10 and the roller shaft 20.
A roller 30 supported rotatably and movably in the axial direction, and one end surface side of the roller 30 is rotatably supported by the roller shaft 20 and the end surface thereof can contact the end surface of the roller 30. The drive wheel 40, and the engagement means 5 provided on the end surfaces of the drive wheel 40 and the roller 30 that come into contact with each other and engage the both in the rotational direction.
0, a biasing means 60 interposed between the roller 30 and the drive wheel 40 to constantly bias the roller 30 in a direction away from the drive wheel 40, and on the other end face side of the roller 30. The roller 3 is supported by the roller shaft 20 and resists the biasing force of the biasing means 60.
An actuator 70 that can press 0 on the drive wheel 40 and a rotary drive source 3 that engages with the outer surface of the drive wheel 40 and drives the drive wheel 40 to rotate are provided.

The roller shaft 20 is inserted into through holes 13 and 14 formed through a pair of side plates 11 and 12 of the frame 10 which are parallel to each other, and female screw portions screwed on both shaft ends thereof. It is fastened to the side plates 11 and 12 by being tightened by a nut 27 that is screwed into. The large-diameter portion 21 provided at the central portion in the axial direction of the roller shaft 20 is ground to a predetermined outer dimension, and
A key groove (not shown) to which the key 22 is attached is provided in a portion facing a bearing 32 that rotatably supports the roller 30. Further, a drive wheel 40 and an actuator 70 are attached to the small diameter portions 23 and 24 provided on both sides of the large diameter portion 21, respectively.

The roller 30 has a pipe 31 cut into a predetermined length, a pair of bearing support members 32 fitted in both ends of the pipe 31, and a pair of bearings 33 attached to the bearing support member 32. And a pair of sliding members 34 and 35 which are fitted in the inner ring of the bearing 33 and are fitted in the roller shaft 20 so as to be slidable in the axial direction. A flange 34a extending so as to face the end surface of the bearing support member 32 is vertically provided at the end of the sliding member 34 on the left side of the drawing among the sliding members 34 and 35, and the flange 34a is provided on the frame 11 side. The surface can be brought into contact with the end surface of the housing 71 of the actuator 70, which will be described in detail later. A key groove extending in the axial direction is engraved on the inner peripheral surfaces of the sliding members 34 and 35, and the roller shaft 2
Key 22 that is interposed between the key groove provided in 0
Are to be engaged. As a result, the pair of sliding members 34 do not rotate relative to the roller shaft 20 but can slide in the axial direction. Therefore, the roller 30 is rotatably supported on the roller shaft 20 and movably in the axial direction, and can be brought into contact with the end surface of the drive wheel 40 when moved to the drive wheel 40 side. There is.

The drive wheel 40 has a pipe 41 that has the same diameter as the pipe 31 of the roller 30 and is cut into a predetermined length, and a pair of bearing support members 42 that are fitted into both ends of the pipe 41. , This bearing support member 4
2 and a pair of bearings 43 attached to the shaft 2.
The pair of bearings 43 has a spacer 44 interposed between the inner rings thereof, and has a step surface 26 on the left end side in the figure of the small diameter portion 24 on the right side of the roller shaft 20 and a side plate portion 12 of the frame 10. It is sandwiched between the roller shaft 20 and the roller shaft 20 and is fixed so as not to move in the axial direction. Further, the drive belt 3 is pressed against the outer peripheral surface of the drive wheel 40, so that the drive wheel 40 is rotationally driven by the power of the drive motor 1. Furthermore, this drive wheel 40
Since both ends thereof are rotatably supported by the pair of bearings 43 with respect to the roller shaft 20, the drive belt 3 can be brought into contact with the outer peripheral surface of the drive wheel 40 with a strong pressing force, and thus this drive is performed. Wheel 40 is roller 3
It is possible to improve the force for rotationally driving 0.

In this embodiment, the engaging means 50 is a pair of annular teeth fixed to the bearing support member 32 on the right side of the roller 30 and the bearing support member 42 on the left side of the drive wheel 40 in the figure. The pad 51 is provided. As shown in FIG. 2, when the roller 30 is pressed toward the drive wheel 40, the teeth 52 of the pads 51 engage with each other, so that the roller 30 and the drive wheel 40 rotate in the rotational direction. It is made to engage and rotate integrally. Furthermore, this toothed pad 51
Since the roller 30 and the drive wheel 40 are provided so as to be exposed to the outside, the engagement state thereof can be easily confirmed. It is needless to say that a friction clutch or a dog clutch may be provided instead of the toothed pad 51.

In this embodiment, the urging means 60 comprises a sliding member 35 on the right side of the roller 30 in the figure and the drive wheel 4.
0 is a coil spring 61 interposed between a snap ring 52 attached to the roller shaft 20 in the vicinity of the bearing 43 on the left side in FIG. The coil spring 61 constantly urges the roller 30 in a direction away from the drive wheel 40, so that the teeth 52 of the toothed pad 51 of the engaging means 50 do not engage with each other, that is, the roller 30 drives the drive wheel 40. It does not rotate together with 40. In addition, as the urging means 60,
Of course, instead of the coil spring 61, an elastic body such as a bamboo spring, a disc spring, or a rubber block may be provided, or a magnet that repels each other, or an actuator such as a solenoid may be used.

In this embodiment, the actuator 70 is a diaphragm operated by high pressure air, and an annular housing 71 having a U-shaped cross section has a small diameter portion 2 of the roller shaft.
The outer diameter of the small diameter portion 23 is supported by being fitted on the outer peripheral surface of the small-diameter portion 23, and is fixed by being sandwiched between the step surface 25 on the right side of the small diameter portion 23 and the side plate 11 of the frame 10. Further, inside the housing 71, a diaphragm main body 72 that is expanded and contracted by high-pressure air supplied through a pipe 73 is provided, and a tip end of the diaphragm main body 72 is provided at a flange of the sliding member 34. When the high pressure air is supplied to the diaphragm main body 72 so as to come into contact with the roller 34a, the roller 3
0 is pushed toward the drive wheel 40. The actuator 70 may be, of course, a hydraulic cylinder that operates hydraulically, or a solenoid that expands when energized, in addition to the diaphragm that operates with high-pressure air.

Next, the operation of the accumulation conveyor 100 of this embodiment will be described. As shown in FIG. 1, when high-pressure air is supplied to the diaphragm main body 72 through the pipe 73, the diaphragm main body 72 expands and projects to the right side in the drawing, and urges the sliding member 34 toward the right side in the drawing. . As a result, the roller 30 is pressed toward the drive wheel 40, the teeth 52 of the toothed pad 51 mesh with each other, and the roller 30 and the drive wheel 40 rotate integrally, and thus the roller 30 is placed on the roller 30. Article 5
Can be transported.

On the other hand, when the high pressure air is not supplied to the diaphragm main body 72, the coil spring 61 as the biasing means 60 biases the roller 30 in the direction away from the drive wheel 40 as shown in FIG. The roller 30 is displaced leftward in the drawing until the flange 34a of the sliding member 34 comes into contact with the housing end surface 71a of the actuator 70. Thereby, the teeth 52 of the toothed pad 51
The disengagement between the rollers allows the rollers 30 to freely rotate or stop. Therefore, the article 5 placed on the roller 30 can be freely moved or stopped, so that the article 5 can be stopped at one position on the accumulation conveyor 100.

That is, in the accumulation conveyor 100 of the first embodiment, the roller 30, the drive wheel 40, the engaging means 50, the urging means 60, and the actuator 70 are arranged side by side on the roller shaft 20.
The structure can be made extremely simple, and manufacturing, assembling, maintenance, and other operations can be easily performed. In particular, since the engagement means 50 is provided so as to be exposed to the outside on the end faces where the roller 30 and the drive wheel 40 contact each other, the degree of engagement between the roller 30 and the drive wheel 40 can be easily adjusted. While you can
Maintenance can be performed easily.

(Embodiment 2) As shown in FIG. 4, an accumulation conveyor 200 according to the present embodiment 2 has an actuator 70 by changing a part of the shape of the roller 30 of the accumulation conveyor 100 shown in FIGS. When high pressure air is not supplied to the roller 30, the roller 30 is brought into contact with the housing end surface 71a of the actuator 70,
The rotation is braked.

That is, as shown in FIG.
, The flange 34 of the sliding member 34 of the roller 30
The outer diameter of a is small, and the flange 32a extending to the end of the bearing support member 32 of the roller 30 so as to face the housing end surface 71a of the actuator 70.
Has been extended. As a result, when the roller 30 is displaced toward the actuator 70 by the urging force of the urging means 60, the flange 32a of the bearing support member 32 abuts the housing end surface 71a of the actuator 70. The contact will brake the rotation.

Therefore, in the accumulation conveyor 200 of the second embodiment, by stopping the supply of high-pressure air to the actuator 70, the article 5 placed on the roller 30 can be made stationary on the roller 30. By supplying high-pressure air to the actuator 70, the article 5 can be conveyed.

[0025]

In the accumulation conveyor of the present invention, the roller, the drive wheel, the engaging means, the urging means, and the actuator are arranged so as to be aligned on the axis of the roller shaft, so that the structure is extremely simple. Therefore, not only manufacturing and assembling but also maintenance such as replacement of parts can be easily performed. Further, since the engaging means is provided so as to be exposed at the end surfaces of the roller and the drive wheel which are in contact with each other, it is possible to easily perform maintenance such as adjustment of engagement of the roller and the drive wheel in the rotational direction and parts replacement. . Therefore, according to the present invention, it is possible to provide an accumulation conveyor which has a simple structure and can be easily assembled and maintained.

[Brief description of drawings]

FIG. 1 is one of an accumulation conveyor according to the present invention.
FIG. 6 is a cross-sectional view showing a state where the roller is driven in the example.

FIG. 2 is a cross-sectional view showing a state where the roller shown in FIG. 1 is not driven.

FIG. 3 is an overall side view schematically showing the accumulation conveyor shown in FIGS. 1 and 2.

FIG. 4 is an enlarged sectional view of a main part of another embodiment of the accumulation conveyor according to the present invention.

[Explanation of symbols]

 1 Motor 2 Output Pulley 3 Drive Belt 4 Sheave 10 Frame 20 Roller Shaft 30 Roller 40 Drive Wheel 50 Engaging Means 60 Energizing Means 70 Actuators 100, 200 Accurate Conveyor

Claims (1)

[Claims] 1. A roller shaft (20) supported on a frame (10).
A roller (30) rotatably supported by the roller shaft (20) and movable in the axial direction; and a roller (30) rotatably supported by the roller shaft (20) on one end surface side of the roller (30). And its end face is the roller (30)
Of the drive wheel (40) capable of contacting the end surface of the drive wheel (40) and the end surface on the side where the drive wheel (40) and the roller (30) contact each other so that the drive wheel (40) and the roller (30) are engageable so that power can be transmitted therebetween. A coupling means (50) and a biasing means interposed between the roller (30) and the drive wheel (40) for constantly biasing the roller (30) in a direction away from the drive wheel (40). (60), the roller (30) is supported on the other end surface side of the roller (30) by the roller shaft (20), and the roller (30) is driven against the driving wheel against the biasing force of the biasing means (60). An actuator (70) that can be pressed against (40), and a rotary drive source (3) that engages with the outer surface of the drive wheel (40) to rotationally drive the drive wheel (40), and the roller (30), the drive wheel (40), the actuator (70), the engaging means (50) is the roller shaft (2
0) An accumulation conveyor (100) characterized by being arranged side by side on top.