JPH01236108A - accumulation conveyor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an accumulation type roller conveyor that can temporarily store conveyed objects on the conveyor.

[Prior Art] As shown in FIGS. 9 to 11, a conventional drive roller conveyor has a long conveyor frame a and a conveyor roller b.
are rotatably mounted in large numbers at required intervals, and a line shaft C which is rotatably driven by an appropriate rotation drive source is disposed below each conveyor roller b in the longitudinal direction of the conveyor frame a, and the line shaft C A round belt r made of urethane is passed between a pulley d fitted and fixed at a required interval and a groove e provided on the outer circumferential surface of the conveyor roller b. Rotational force is transmitted to roller b.

Normally, the conveyed objects are sequentially conveyed at a constant speed by the rotation of each conveyor roller b.

When the movable stopper 9 is projected at an appropriate position on the conveyor frame a to prevent the movement of the conveyed objects, slippage occurs between the pulley d and the line shaft C, and the conveyed objects are accumulated one after another on the conveyor.

If the movable stopper q is released, the above-mentioned slip will not occur and the accumulated load will be transferred.

[Problems to be Solved by the Invention] However, in such a conventional roller conveyor, since the conveyor roller b and the line shaft C are arranged to intersect with each other, the depth (height) of the conveyor h becomes large. A system that stores luggage by stacking them in multiple tiers requires a large amount of space.

Grooves e must be formed on each conveyor roller b, which increases costs.

The driving torque is determined by the tension of round belt f, but roller b
, d is constant, so the tension cannot be changed with the same round belt r.

A round belt r made of rubber such as urethane has permanent elongation and its tension changes over time. Also, since they are left under tension, they deteriorate quickly over time and may even break. Therefore, the round belt f requires periodic replacement.
Conveyor roller b has to be removed each time it is replaced, making maintenance time-consuming.

On the other hand, in order to cut out one piece when the movable stopper 9 is released, is it necessary to change the speed on the line such as increasing the speed of the rollers before and after the movable stopper 9?
In this case, it is necessary to change the diameter of pulley d or b.

It is an object of the present invention to solve these conventional problems and to provide a thin and durable device that can also easily adjust the driving force.

[Means for Solving the Problems] The present invention includes a conveyor frame rotatably equipped with a plurality of conveyor rollers, a line shaft rotatably supported in a direction perpendicular to the conveyor rollers, and a conical cone attached to the line shaft. A friction roller having a shape of 1.5 mm is loosely fitted so that its slope is in contact with the shoulder of each conveyor roller, and a spring and a stopper member biased in a direction to press each friction roller against the shoulder of the conveyor roller are respectively attached to the line. It is characterized by being attached to the shaft.

[Operation] The rotational force of the line shaft is transmitted to the conveyor roller via a friction roller supported by a spring on the line shaft using a stopper member as a reaction force table.

When the conveyed articles on the conveyor roller are forcibly stopped, slip occurs between the conveyor roller and the friction roller and/or between the friction roller and the line shaft, and the conveyed articles are accumulated.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

1 to 5 show an embodiment of the present invention, in which a plurality of cylindrical conveyor rollers 3 having grooves are rotatably attached at required intervals to a conveyor frame 1.2, and one conveyor frame 2 An opening 4 is formed in the vicinity of each conveyor roller 3 support portion on the side surface of the conveyor roller 3 .

A line shaft 5 is rotatably attached to the side surface of the one conveyor frame 2 via a bearing 6 so as to be parallel to the entire length of the conveyor frame 2 and approximately concentric with the conveyor roller 3, and one end of the line shaft 5 is attached to the side surface of the conveyor frame 2. A pulley 7 fixed to the conveyor frame 1 and a pulley 9 attached to the output shaft of a drive motor 8 provided at a predetermined position on the conveyor frames 1 and 2 are hooked and rotated by an endless belt 10 so that they can be rotated.

Friction rollers 11 made of a hard and wear-resistant synthetic resin such as high-density polyethylene, nylon 6, or phenol resin are molded into a truncated cone shape, and the same number of friction rollers 11 as the conveyor rollers 3 are loosely fitted onto the line shaft 5. 1
1 pass through the opening 4 and the inclined curved surface of the friction roller 11 can contact the curved surface of the shoulder of the conveyor roller 3.
is urged by a spring 12 in a direction in which it comes into pressure contact with the shoulder portion of each conveyor roller 3, and is fixed by a stopper ring 13.

The stopper ring 13 can be fixed at any position on the line shaft 5 with a screw 16 or the like, and the pressing force of the spring 12 can be adjusted. In the figure, 14 indicates a movable stopper, and 15 indicates an actuator.

With the above configuration, when the drive motor 8 is operated, the line shaft 5 is rotated via the pulley 9, the endless belt 1O, and the pulley 7, and each friction roller 11,
The spring 12 and the stopper ring 13 also rotate together, and the conveyor rollers 3 that contact the inclined surfaces of the rotating friction rollers 11 at their shoulders are rotated, and torque is transmitted in the right angle direction.

When the movable stopper 14 is protruded by the actuator 15 to forcibly stop the transported object 17, the load on the conveyor roller 5 increases, so that slippage occurs between the friction roller 11 and the line shaft 5 or between the conveyor roller 3 and the friction roller 11. occurs, and the conveyor roller 3 stops.

That is, Fs: Spring force P: Roller contact pressure R+, R2: Reaction force μ: Sliding friction coefficient μ, - conveyor roller friction roller μ! - Between the friction roller line shafts μS - Between the friction roller springs d: Diameter d, - Conveyor roller diameter dc - Conveyor roller drive diameter d, - Line shaft diameter df - Friction roller drive diameter cis - Spring diameter h: R+ point and R2 point phase interval a
: Contact point between conveyor roller and friction roller, and R
Phase interval θ between two points: The angle of the inclined surface of the friction roller is as follows.

Since it is PX-FS, py = PX /lanθ-Fs/lanθ ・(
DP-Px/sinθ-,・m reaction force is R+=(Px-df/2-Py-a)/h・(mR
2! R, +PV...The rotating moment (torque...with respect to the line shaft axis) is
The torque between the line shaft and the friction roller is T,
Then, T, -μi 0 (R1+R2) 0di/2+μs
0Fs l1ds / 2 - (V) Friction roller If the torque between the conveyor rollers is Tf, Tr -μr -P-dr/2 -&D The maximum allowable driving torque is the smaller of Tl and Tf, and this is T
shall be.

Conveyor roller driving torque: Tr T, -T-dc/df Roller tangent crab Q...(a) Q=T
-dc/dr/dr ・2 -mThe conveyance speed V is Vsmneπsdr -dr/da ・=Gy)
n Line shaft rotation speed r, p, m.

It is expressed as

In order to cause slippage between the friction roller 11 and the conveyor roller 3, it is sufficient to set T7>T(.If Tl<Tf, slippage occurs between the line shaft and the friction roller.

How to press the spring 12 Fs1 Each part dimensions (a, h
, θ, di, df, dc, d,), and each friction coefficient (μ, material) can change the driving force and conveyance speed.

Since the friction roller 11 has a conical shape, the conveying speed can be easily changed. That is, if the contact point between the conveyor roller 3 and the friction roller 11 is shifted in the direction where d becomes smaller, the speed becomes smaller. Conversely, if you shift it in the direction where d increases, the speed will increase. Specifically, it is sufficient to move the conveyor roller 3 in the axial direction, and in reality, a spacer 19 such as a washer or collar is removably provided on the shaft 18'' at the other end of the conveyor roller 3, and its thickness is adjusted. This allows the conveyance speed to be easily changed.

The spring force (Fs) of the spring 12, which is most related to the driving force of the conveyor, is adjusted by adjusting the set length of the spring 12 depending on the fixed position of the stopper ring 13.

Since the line shaft 5 continues to rotate, there is always forward force, and the conveyed object 17 starts immediately when the movable stopper 14 is released.

FIGS. 6 to 8 show another embodiment of the present invention, in which the structure is substantially the same as that of the previous embodiment, but one shaft 18' of each conveyor roller 3' is made slightly longer, and each of the extended shafts 18' is slightly longer. 18°
A line shaft 5'' is disposed below the axis 18 degrees in a direction perpendicular to the axis 18 degrees, and a friction roller 11 and a spring 1
2 and a stopper ring 13 are respectively attached to enable torque transmission. In Figures 6 to 8, 1
The same reference numerals as in FIGS. 5 to 5 indicate the same parts.

In the case of this embodiment, the line shaft 5'', friction roller 11, etc. can be housed inside the conveyor frame 1, and the machining of the opening 4 of the conveyor frame 1 as shown in FIG. 2 etc. is not necessary. Shaft 5' is axis 1
Since the angle is below 8 degrees, the top of the friction roller 11 is at a lower position than the top of the conveyor roller 3 degrees, so the conveyed object 17 can be conveyed in an overhanging manner.

It should be noted that the accumulation conveyor of the present invention is not limited to the above-described embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

[Effects of the Invention] As explained above, the accumulation conveyor of the present invention exhibits various excellent effects as described below.

■ Because the line shaft is installed at the same height as the axis of the conveyor roller or slightly below it and the friction roller is attached, the depth (height) of the conveyor is minimized, making it easier to store the conveyor rollers by stacking them in multiple stages. This is advantageous in that it takes up less space.

(It) The conveyor speed can be easily changed by simply adjusting the collar width of the Ilh portion of the conveyor roller without replacing parts such as friction rollers and springs.

■Friction rollers are hard to wear, and even slight wear has almost no effect, and there is almost no deterioration due to aging, so they are highly durable and can be used stably for a long period of time.

■■ This eliminates the need for conventional maintenance in the event of permanent elongation, tearing, or deterioration due to aging of the rubber belt.

(7) The driving force can be easily adjusted by adjusting the fixed position of the spring.

■ It is possible to use an ordinary free roller as the conveyor roller, and there is no need to use a conventional grooved roller, resulting in low manufacturing costs.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of an embodiment of the conveyor of the present invention, Fig. 2 is a view taken along the direction arrows - - - in Fig. 1, and Fig. 3 is an illustration of - - - in Fig. 1.
4 is a detailed view of the ■ part in FIG. 1, FIG. 5 is a view as viewed from the ■-■ direction in FIG. 4, and FIG. 6 is an explanatory diagram of another embodiment of the conveyor of the present invention. , FIG. 7 is a view taken from the ■-■ direction of FIG. 6, FIG. 8 is a view taken from the ■-■ direction of FIG. 6, FIG. 9 is a view showing an example of a conventional roller conveyor, and FIG. 10. 11 is a detailed view of the X1 section in FIG. 1O. 1.2 is a conveyor frame, 3,3° is a conveyor roller, 5,5° is a line shaft, 11 is a friction belt, 12 is a spring, 13 is a stopper ring, 14 is a movable stopper, 16 is a screw, 17 is a conveyed object shows. difference ,

Claims (1)

[Claims] 1) A line shaft is rotatably supported in a direction perpendicular to the conveyor rollers on a conveyor frame rotatably equipped with a plurality of conveyor rollers, and a conical friction roller is attached to the line shaft so that its sloped surface An accumulation system characterized in that a spring and a stopper member are respectively attached to the line shaft, each of which is loosely fitted so as to come into contact with the shoulder of the conveyor roller, and biased in a direction to press each friction roller against the shoulder of the conveyor roller. Conveyor.