JPH038642Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is a chain conveyor that increases the conveyance speed higher than the chain speed and achieves a good accumulation rate without causing slips between the conveyor and the conveyed objects. This invention relates to a speed-increasing accumulation rate conveyor.

(Prior art) A speed-increasing accumulation rate conveyor that allows the conveyance speed to be higher than the chain speed and enables accumulation rate without causing slips between the conveyed objects is disclosed in, for example, Utility Model Application Publication No. 55-43704. Alternatively, it is known from Japanese Patent Publication No. 58-46406.

In the former type of conveyor, the diameter of the support roller is larger than the diameter of the running roller, and the running rollers are arranged on both sides of the support roller, and the side surface of the support roller contacts the side surface of the running roller and rotates together. The running rollers are supported by the guide portions of the rails.

With this structure, the support roller rotates in the same direction as the traveling roller rolls, and the rotational force of the support roller drives and conveys the conveyed object on the support roller, and when the conveyed object stops, the support roller rotates in the same direction. The frictional force between the conveyed object and the support roller overcomes the frictional force between the travel roller and the support roller, causing the support roller to reverse, resulting in good accumulation without causing slips between the conveyed object and the conveyed object. It is intended to make the rate possible.

On the other hand, in the latter conveyor, a conveyance roller of a larger diameter is loosely fitted onto a chain roller fitted on a chain shaft, and the chain roller is guided by a rail.

With this structure, the chain roller is pressed against the rail by the load of the conveyed object on the conveyor roller, and the chain roller is driven to rotate as the chain advances, and the conveyor roller is driven by friction with the chain roller. If the conveyor is rotated to drive and convey the conveyed object at a speed higher than the traveling speed of the chain, and the conveyed object is stopped, slippage will occur between the conveyance roller and the chain roller, causing the conveyance roller to reverse with respect to the conveyed object. This is intended to allow the chain to advance without slipping between the chain and the conveyed material, thereby allowing for an accumulation rate.

(Problem to be solved by the invention) In the previously known conveyor of the above-mentioned type, there is no forced pressure contact between the support roller and the running roller, so that the support roller and the running roller have a moderate contact with each other. If they are in contact, a desirable speed increasing function can be obtained, but if there is no contact relationship, the speed increasing effect may not be exhibited at all, and it is difficult to obtain the speed increasing function. The problem with this is that it lacks certainty. Particularly when the weight of the conveyed object is large, there is a problem that slip occurs between the support roller and the traveling roller and the speed cannot be increased, and the load of the conveyed object has not been taken into consideration at all.

On the other hand, regarding the previously known latter conveyor,
Since the conveyance roller is pressed against the chain roller by the load of the conveyed object, it has the advantage of reliably achieving speed-up function with a simple structure. Since it is only a small part of the inner surface of the roller and the outer surface of the chain roller, there is a risk that the contact area may become uneven, which may also cause unevenness of the wear area, causing noise and shortening the service life. There is a problem with the decrease. Furthermore, in this conveyor, if the conveyed object becomes heavy, the load will be applied to the chain roller, which will impede the rolling of the chain roller and cause the chain roller and rail to slip, causing the risk of the speed increasing function not being achieved. However, this idea also does not take into account changes in the weight of the transported object.

In view of the above-mentioned problems with the previously known conveyors, this invention increases the conveyance speed higher than the chain speed, and eliminates the occurrence of slips between the conveyor and the conveyed object.
This new system not only enables a favorable accumulation rate, but also can be designed in advance to reliably increase the speed of conveyance and increase the accumulation rate depending on the weight of the conveyed object. The present invention provides an accelerated accumulation rate conveyor.

(Means for solving the problem) For this reason, in this invention, a large diameter conveyance roller is sandwiched between a pair of chain rollers, and these chain rollers and conveyance rollers are pivotally supported on a chain shaft.
A conveyor in which a chain roller and a conveyance roller are able to come into contact with each other, and the chain roller is supported on a rail. It is characterized in that both ends of the spring are bent to grip the chain roller, and the spring is brought into elastic pressure contact with the chain roller.

(Function) In this invention, a large diameter conveyance roller is sandwiched between a pair of chain rollers, the chain roller and the conveyance roller are supported on a chain shaft, and a spring support protrusion is provided on the side surface of the conveyance roller. A spring is wound around the support protrusion to support it, and both ends of this spring are bent to grip the chain roller, and this spring is brought into elastic pressure contact with the chain roller, so that the rotational force of the chain roller while the chain is running is reduced. It is transmitted to the conveyance roller via a spring, and this conveyance roller is rotated together with the chain roller to drive and convey the conveyed object on the conveyance roller and increase the speed. Meanwhile, while the chain is running,
When the conveyed object stops, the conveying roller stops rolling along with the chain roller due to the load, slips between the spring and the chain roller, and the conveying roller reverses to the bottom of the conveyed object and advances. and effectively accumulate the transported items.

(Example) The details of the present invention will be explained below with reference to preferred embodiments shown in the drawings.

In the figure, 1 and 1 are link plates, and 2 is a chain shaft provided through the overlapping part of each link plate 1 and 1 on both the left and right sides, and connects the left and right link plates 1 and 1, as well as the front and rear link plates 1, 1 are interconnected to form a chain body. 3,
3 is a pair of chain rollers, and 4 is a conveying roller having a diameter larger than that of the chain roller 3. These chain rollers 3, 3 and the conveying roller 4 are pivotally supported on a chain shaft 2. Moreover, the conveyance roller 4 is positioned between the chain rollers 3, 3.

As shown in FIGS. 4 and 5, recesses 5 are formed on both sides of the conveyance roller 4, and the inner ends of the chain rollers 3, 3 are inserted into the recesses 5. The inner end portions of the chain rollers 3, 3 have a small diameter, and an annular groove 6 is further formed in this small diameter portion.

On the other hand, a spring support protrusion 7 is provided in a part of the recess 5 of the conveyance roller 4 and protrudes from the side surface of the conveyance roller 4, as shown in FIGS. 4 and 5. A spring 8 is wound around it to support it. Both ends 8' of this spring 8,
8' in the groove 6 of the chain roller 3,
Moreover, it is bent so as to grip the chain roller 3, and is brought into elastic pressure contact with the chain roller 3. In the illustrated embodiment, the spring support protrusions 7 protruding from both sides of the conveyance roller 4 and the springs 8, 8' supported by these protrusions are shifted by 90 degrees, but this deflection angle is 90 degrees. You don't have to.

In the figure, reference numerals 9, 9 are rails that support and guide the chain rollers 3, 3.

The conveyor of the present invention, which has the configuration as described above,
Similar to known conveyors, the conveyor is stretched between chain sprockets (not shown) for circulation operation. This circulating operation causes the chain rollers 3, 3 to move to the rail 9,
9, the chain rollers 3, 3 roll on the rails. Since both ends 8', 8' of a spring 8 supported by the protrusion 7 of the conveyance roller 4 are in elastic pressure contact with the chain roller 3, the rotational force of the chain roller 3 is transferred by the connecting force of the spring. roller 4
This conveyance roller 4 is also transmitted to the chain roller 3.
The chain rotates as the chain rotates, drives and conveys the conveyed object A placed thereon, and conveys the conveyed object at a speed faster than the speed of the chain.

When the conveyed object A is stopped, the friction between the conveyed object A and the conveyance roller 4 is caused by the load of the conveyed object A, and the both ends 8' of the spring 8,
The spring 8 slips between both ends 8', 8' and the chain rollers 3, 3 by overcoming the pressing force exerted by the spring 8' on the chain rollers 3, 3, and the conveying roller 4 slips between the conveyed object A. It spins idly and accumulates the conveyed object A.

In this invention, both ends 8' of the spring 8,
Since the connection between the chain roller 3 and the conveyance roller 4 is maintained by the elastic pressure contact force applied to the chain roller 3 by the spring 8', when the weight of the conveyed object A is small, the elastic pressure contact force of the spring is slightly reduced in advance. For a conveyor that conveys a heavy object, the spring's elastic pressing force may be set to a large value.

(Effect of the invention) As described above, in the present invention, the spring is supported by the spring support protrusion provided on the conveyance roller, and both ends of this spring are bent into a shape that grips the chain roller, and the elastic contact force of the spring is Therefore, since the chain roller and the conveyance roller are connected, it is of course possible to increase the speed of conveyance and the accumulation rate of conveyed objects, and in particular, in the present invention,
By setting the magnitude of the elastic contact force of the springs in advance, a conveyor can be created that can convey not only very small weight items but also large weight items with speed increase and accumulation rate functions. There are great advantages that can be gained.

[Brief explanation of the drawing]

The drawings show a preferred embodiment of the conveyor of the present invention; FIG. 1 is a schematic front view and a partially sectional view, FIG. 2 is an enlarged view of a portion thereof, and FIG. The figure is a plan view showing the chain.
FIG. 4 is an enlarged sectional view in the direction of the chain axis showing the essential parts of the present invention, and FIG. 5 is an enlarged sectional view in the direction perpendicular to the chain axis. 2...Chain shaft, 3...Chain roller, 4
...Transport roller, 7...Spring support protrusion, 8
...Spring, 8'...Both ends, 9...Rail.

Claims (1)

[Scope of utility model registration request] A large-diameter conveyance roller is sandwiched between a pair of chain rollers, and the chain roller and the conveyance roller are supported on a chain shaft so that the chain roller and the conveyance roller can come into contact with each other, and the chain roller is supported on the rail. In the conveyor, a spring support protrusion is provided on the side surface of the conveyance roller, a spring is wound around the support protrusion for support, both ends of the spring are bent to grip the chain roller, and the spring is attached to the chain roller. A speed-increasing accumulation rate conveyor characterized by being brought into pressure contact with the conveyor.