JPH0790888B2 - Accumulation conveyor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to an accumulated roller conveyor capable of temporarily storing a conveyed product on a conveyor.

[Prior Art] As shown in FIGS. 9 to 11, a conventional driving roller conveyor has a long conveyor frame a to which a number of conveyor rollers b are rotatably mounted so that each conveyor roller b is rotatable. A line shaft c, which is rotationally driven by an appropriate rotary drive source, is disposed below in the longitudinal direction of the conveyor frame a, and a pulley d and a conveyor roller b are fitted and fixed to the line shaft c at a required interval. Wrap the urethane round belt f between the groove e provided on the outer peripheral surface,
The rotational force is transmitted from the line shaft c that is rotationally driven to each conveyor roller b.

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

When the movable stopper g is projected to an appropriate position on the conveyor frame a to prevent the movement of the conveyed object, a slip occurs between the pulley d and the line shaft c, and the conveyed object is successively accumulated on the conveyor.

When the movable stopper g is released, the above-mentioned slip does not occur and the accumulated load is 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 so as to intersect with each other, the depth (height) of the conveyor h becomes large. A system that stores luggage by stacking multiple layers requires a large space.

Grooves must be formed in each conveyor roller b, which results in high cost.

The driving torque is determined by the tension of the round belt f, but the rollers b,
Since the distance between d is constant, the tension cannot be changed with the same round belt f. The round belt f made of rubber such as urethane has a permanent elongation, and the tension changes with time. or,
Since it is left under tension, it deteriorates rapidly over time and may even tear. Therefore, the round belt f
Needs to be replaced regularly, and the conveyor roller b
Has to be removed, and maintenance is troublesome.

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

An object of the present invention is to solve such a conventional problem and to make it thin and durable and to easily adjust the driving force.

[Means for Solving the Problem] The present invention rotatably supports a line shaft in a direction orthogonal to the conveyor rollers on a conveyor frame having a plurality of conveyor rollers rotatably, and conical the line shaft. -Shaped friction rollers are loosely fitted so that their slopes come into contact with the shoulders of the conveyor rollers, and springs and stopper members that bias the friction rollers in the direction of pressing the shoulders of the conveyor rollers are provided in the lines. It is characterized in that it is attached to a shaft, a spacer is detachably arranged at one end of the shaft of the conveyor roller, and a movable stopper for stopping the flow of the conveyed product is provided between predetermined conveyor rollers.

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

When the conveyed article on the conveyor roller is 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 article is accumulated.

Further, since the line shaft is arranged at the same height as or slightly lower than the axis of the conveyor roller and the friction roller is attached to the line shaft, the depth (height) of the conveyor is reduced, so that the conveyor is multi-staged. The space occupied by the system that is stacked and stored in the can be reduced.

Further, since the friction roller has a conical shape and the spacer is detachably attached to one end of the shaft of the conveyor roller, the thickness of the spacer is adjusted, and the conveyor roller is moved in the axial direction to frictionally contact the conveyor roller. By shifting the contact point of the roller, the speed of the conveyor roller can be adjusted, and thus the speed of the conveyor roller before and after the movable stopper can be changed easily and quickly on the line to increase the speed. It is possible to improve work efficiency.

[Examples] Examples 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 conveyor frames 1 and 2 are cylindrical and have no grooves.
Are rotatably mounted at required intervals, and openings 4 are formed in the side surfaces of one conveyor frame 2 in the vicinity of the supporting portions of the respective conveyor rollers 3.

A line shaft 5 is rotatably mounted on a side surface of the one conveyor frame 2 through a bearing 6 so as to be parallel to the entire length of the conveyor frame 2 and substantially concentric with the conveyor roller 3, and one end of the line shaft 5 is attached. The pulley 7 fixed to the section and the pulley 9 attached to the output shaft of the drive motor 8 provided at the required position of the conveyor frames 1 and 2 are wound around the endless belt 10 so that they can be rotationally driven.

Friction rollers 11 made of hard and abrasion-resistant synthetic resin such as high-density polyethylene, nylon 6 and phenol resin are frusto-conical in shape and are fitted onto the line shaft 5 in the same number as the conveyor rollers 3 to form friction rollers. Part of the friction roller 11 passes through the opening 4, and the inclined curved surface of the friction roller 11 is arranged so as to be in contact with the curved surface of the shoulder portion of the conveyor roller 3, and each friction roller 11 is arranged on the shoulder portion of each conveyor roller 3. It is biased by a spring 12 in the direction in which it is pressed against and is fixed by a stopper ring 13. The stopper ring 13 can be fixed to an arbitrary 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 is a movable stopper, and 15 is 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 10, and the pulley 7, and the friction roller 11, spring 12, and stopper ring 13 are also integrated. The conveyor rollers 3 contacting the inclined surfaces of the rotating friction rollers 11 at the shoulders are rotated, and the torque is transmitted in the perpendicular direction.

When the movable stopper 14 is projected by the actuator 15 to forcibly stop the conveyed object 17, the load on the conveyor roller 3 becomes large, so that the friction roller 11 and the line shaft 5 or the conveyor roller 3 and the friction roller 11 are slid. Occurs, and the conveyor roller 3 is stopped.

F _s : Spring force P: Roller contact pressure R ₁ , R ₂ : Reaction force μ: Coefficient of sliding friction μ _r = Conveyor roller-friction roller μ _l = Friction roller-line shaft μ _s = Friction roller-spring during d: diameter d _r = conveyor roller diameter d _c = the conveyor roller drive diameter d _l = line shaft diameter d _f = friction roller driving diameter d _s = spring diameter h: phase interval between R ₁ point and R ₂ points a: The contact between the conveyor roller and the friction roller, R ₂
Phase interval θ with respect to the point: Assuming the angle of the inclined surface of the friction roller is as follows.

Since P _x = F _s , P _y = P _x / tan θ = F _s / tan θ (i) P = P _x / sin θ (ii) The reaction force is R ₁ = (P _x · d _f / ₂ −P _y・ a) / h… (iii) R ₂ = R ₁ + P _y … (iv) Rotational moment (torque… with respect to the line shaft axis)
Is the torque between the line shaft and the friction roller.
When _{T l, T l = μ l} · (R 1 + R 2) · d l / 2 + μ s · F s · d s / 2 ... (v) friction roller - When the torque between the conveyor rollers T _f, T _f = μ _r · P · d _f / ₂ (vi) The allowable maximum drive torque is the smaller of T _l and T _f , and this is T.

Conveyor roller drive torque: T _r T _r = T ・ d _c / d _f Roller tangential force: Q (vii) Q = T ・ d _c / d _f / d _r・ 2 (viii) V is expressed by V = n · π · d _r · d _f / d _c (ix) n: line shaft rotation speed rpm.

In order to cause slippage between the friction roller 11 and the conveyor roller 3, it is sufficient to satisfy T _l > T _f . If T _l <T _f , line shaft −
Slip between friction rollers.

The pressing force F _s of the spring 12 and the dimensions of each part (a, h, θ, d _l ,
The driving force and the conveying speed can be changed by d _f , d _c , d _n ) and each friction coefficient (μ, material).

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 in which d decreases, the speed decreases. On the contrary, if the speed is increased in the direction in which d increases, the speed increases. Specifically, it suffices to move the conveyor roller 3 in the axial direction. In practice, a spacer 19 such as a washer and a collar is detachably provided on the shaft 18 'at the other end of the conveyor roller 3 to adjust its thickness. By doing so, the transport speed can be easily changed.

The adjustment of the spring force (F _s ) of the spring 12 which is most related to the driving force of the conveyor is performed 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 a forward force, and when the movable stopper 14 is released, the conveyed product 17 immediately starts.

FIGS. 6 to 8 show another embodiment of the present invention. In the structure substantially similar to the above embodiment, one shaft 18 'of each conveyor roller 3'is made slightly longer and each of the extended shafts 18' is This is an example in which a line shaft 5'is arranged in a direction perpendicular to the shaft 18 'below', and a friction roller 11, a spring 12 and a stopper ring 13 are attached to each other so that torque can be transmitted. 6 to 8, the same reference numerals as those in FIGS. 1 to 5 indicate the same components.

In the case of this embodiment, the line shaft 5 ', the friction roller 11 and the like can be housed inside the conveyor frame 1, and the processing of the opening 4 of the conveyor frame 1 in FIG. 2 and the like becomes unnecessary. Line shaft 5'is shaft 18 '
Since the upper portion of the friction roller 11 is located lower than the upper portion of the conveyor roller 3 ', the article 17 can be overhung and conveyed.

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 modifications can be made without departing from the scope of the present invention.

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

(I) Since the line shaft is arranged at the same height as or slightly lower than the axis of the conveyor roller and the friction roller is attached, the depth (height) of the conveyor is minimized, and when stacked and stacked in multiple stages. This is advantageous because it can reduce the occupied space.

(II) Since the friction roller has a conical shape and the spacer is detachably attached to one end of the shaft of the conveyor roller, the thickness of the spacer is adjusted, and the conveyor roller is moved in the axial direction to form the conveyor roller. By shifting the contact point of the friction roller, the speed of the conveyor roller can be adjusted, so that the speed of the conveyor roller before and after the movable stopper can be changed quickly and easily on the line. It can be performed and the work efficiency can be improved.

(III) The friction roller is hard to wear, has little effect on the friction roller, and hardly deteriorates due to aging, and thus has durability and can be used stably for a long period of time.

(IV) Due to (III), conventional maintenance is not required when the rubber belt is permanently stretched, torn, or deteriorated due to aging.

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

(VI) It is possible to use an ordinary free roller as the conveyor roller, and it is not necessary to use a grooved roller as in the conventional case, and the manufacturing cost is low.

[Brief description of drawings]

1 is an explanatory view of an embodiment of the conveyor of the present invention, FIG. 2 is a view taken in the direction of arrows II-II in FIG. 1, and FIG. 3 is III-I in FIG.
II direction arrow view, FIG. 4 is a detailed view of IV portion of FIG. 1, FIG. 5 is a VV direction arrow view of FIG. 4, and FIG. 6 is description of another embodiment of the conveyor of the present invention. Fig. 7, Fig. 7 is a view in the direction of VII-VII in Fig. 6, Fig. 8 is a view in the direction of VIII-VIII in Fig. 6, Fig. 9
FIG. 10 is a view showing an example of a conventional roller conveyor, FIG. 10 is a view taken in the direction of arrow XX in FIG. 9, and FIG. 11 is a detailed view of a portion XI in FIG. 1,2 are conveyor frames, 3,3 'are conveyor rollers, 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 and 17 is a conveyed product.

Claims (1)

[Claims] 1. A line shaft is rotatably supported on a conveyor frame having a plurality of conveyor rollers rotatably in a direction orthogonal to the conveyor rollers, and a conical friction roller is provided on the line shaft. Are loosely fitted so as to contact the shoulders of the respective conveyor rollers,
A spring and a stopper member, which urge each friction roller in a direction in which the friction roller is pressed against the shoulder portion of the conveyor roller, are attached to the line shaft, and a spacer is detachably arranged at one end of the shaft of the conveyor roller, and a predetermined distance is provided. An accumulation conveyor characterized in that a movable stopper for stopping the flow of a conveyed product is provided between the conveyor rollers.