JPH0432345Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field of the Invention The present invention relates to roller chain type conveyors, and particularly relates to improvements in relay portions of these chain conveyors.

Background of the invention The center line of a conveyor chain is tangent to the pitch circle of the sprocket. However, when the chain is wrapped around the sprocket, it forms a polygon that corresponds to the number of teeth, so the actual winding position changes in the vertical direction.

First, this point will be explained with reference to FIG.

As shown in figure a, when the bottom of the sprocket tooth is on the vertical line V, that is, when the center line of the chain roller is on the vertical line V, the height of the roller from the center of rotation on the vertical line V is The radius coincides with the radius R of the pitch circle. However, as shown in Figure b,
When the tips of the sprocket teeth match the vertical line V,
That is, when the two rollers of the chain are in a state of line symmetry with the vertical line V as the axis of symmetry, the height of the chain does not match the above case and is lower. As a result, the chain changes by a height difference δ at the sprocket position. As a result, objects to be conveyed, such as pallets, will vibrate in the vertical direction at the sprocket. Such vibrations are particularly noticeable when the pitch of the chain is large.

PRIOR TECHNOLOGY The above drawback is that a non-driven intermediate roller is provided at the joint, and the outside diameter of the sprocket is made small.The conveyor chain is lowered at the joint, and the intermediate roller is used to increase the pallet feed height. You can solve this by setting them the same. However, according to such means, since the intermediate roller is not driven, the pallet cannot be reliably fed onto the chain for the next conveyor, and the pallet tends to stop at the connecting portion.

Purpose of the invention Therefore, the purpose of the present invention is to prevent the vertical movement of conveyed objects at the intermediate part between connected chain conveyors, and to prevent the conveyed objects from moving in the vertical direction from one chain conveyor to the other chain conveyor. , to provide a reliable means of transport.

Summary of the invention Therefore, the present invention provides a roller support plate on the same axis as the sprocket at the relay part between the chain conveyors, supports a large number of rotatable rollers in a concentric ring around the outer periphery of the roller support plate, and supports the rollers in a concentric ring shape. and the conveyance surface of the chain conveyor are set at the same height.

Therefore, the conveyed object on the chain transfers from the top of the chain onto the rollers of the roller support plate at the relay section of the chain conveyor, and is forcibly fed out at the same height as the chain support surface. Does not cause inconveniences such as vibration.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the drawings.

In the present invention, a plurality of chain conveyors 1 are connected in a straight line. A pair of frames 2 of a chain conveyor 1 rotatably support a sprocket 4 via a horizontal shaft 3. One axis 3
is supported by a fixed bearing 5 relative to the frame 2, while the other shaft 3 is movably supported relative to the frame 2 by a longitudinally movable bearing 6. . Note that the movement of the bearing 6 in the longitudinal direction can be adjusted by a longitudinal adjustment screw 7 screwed into a part of the frame 2.

An endless chain 8 is wound around these sprockets 4. This chain 8 is
It is a roller chain, and its chain roller 9
is rotatable relative to a pin 11 for connecting the chain plate 10, and can move while rolling on a guide rail 12 provided between the sprockets 4. Note that this guide rail 12 is fixed to the inner surface of the frame 2. The chain plate 10 of this chain 8 is
A conveyed object 1 such as a pallet is conveyed by the roller shaft 16.
A roller 17 for supporting the roller 9 is rotatably held. The upper surfaces of these rollers 17 serve as conveyance surfaces for the chain 8.

The shaft 3 at one end is provided with a sprocket 18 on the outer side of the frame 2, and receives rotational force from an external drive means, thereby driving the chain 8 in the conveying direction.

Further, the shaft 3 fixedly supports a roller support plate 13 in addition to the sprocket 4. The roller support plate 13 has a large number of horizontal roller pins 14 arranged along concentric annular lines on its outer periphery, and supports a roller 15 rotatably by the roller pins 14. The top surface of this roller 15 coincides with the conveyance surface of the chain 8.

action of invention The operation of the present invention will be explained below.

A conveyed object 19 such as a pallet rides on the rollers 17 of the chain 8 and is conveyed by movement of the chain 8 in the conveying direction. When the chain 8 is wound around the outer periphery of the sprocket 4, as already mentioned, the chain 8 has a height difference δ between the normal height and the normal height.
The vertical movement will be repeated. However, the conveyed object 19 transfers from the upper surface of the roller 17 onto the roller 15 of the roller support plate 13 at the relay portion, and
Because it is sent out by the rotation of the roller support plate 13, regardless of the height difference δ of the chain 8 on the vertical line of the sprocket 4, the same height is maintained and it is forced in the direction of the adjacent chain conveyor 1. will be sent to.

Note that since the roller support plate 13 is rotating,
When the lower surface of the conveyed object 19 comes into contact with the two rollers 15, it will move down a little as in the case of the sprocket 4, but the pitch of the rollers 15 on the roller support plate 13 will be lower than the roller 9 of the chain 8. Since the pitch is set to be sufficiently smaller than the pitch of
There is no problem in practical use. Of course, for this reason, the pitch of the rollers 15 must be set as small as possible.

Modified Example of the Invention The pitch of the rollers 15 can be set sufficiently small by arranging the rollers 15 alternately, that is, in a staggered manner, on different sides of the roller support plate 13. Furthermore, the chain 8 is equipped with a roller 17 in addition to the roller 9, and this roller 17 is
The roller 9 of the chain 8 can also be used.

Effects of the invention In this invention, objects to be conveyed, such as pallets, transfer to the rollers of the roller support plate at the intermediate part of the chain conveyor, and are transferred to the next chain conveyor while being set at the same height as the conveyance surface of the chain. Vertical movement of conveyed objects at the relay section can be reliably prevented. Further, since the roller support plate rotates in synchronization with the feed speed of the chain, the conveyed object can be reliably transferred even at the intermediate portion.

[Brief explanation of the drawing]

Fig. 1 is a theoretical side view of the part where the sprocket and chain are wrapped, Fig. 2 is a plan view of the intermediate part of the chain conveyor of the present invention, Fig. 3 is a front view of the support plate part, and Fig. 4 is FIG. 3 is a vertical cross-sectional view of a portion of the roller support plate. 1...Chain conveyor, 2...Frame, 3
... shaft, 4 ... sprocket, 5 ... fixed bearing, 6 ... bearing, 7 ... adjustment screw, 8 ... chain, 9 ... roller, 10 ... chain plate,
11... Pin, 12... Guide rail, 13... Roller support plate, 14... Roller pin, 15... Roller, 16... Roller shaft, 17... Roller, 18...
... Sprocket, 19... Object to be transported.

Claims (1)

[Scope of utility model registration request] In a chain conveyor in which an endless chain is fed by a sprocket and conveyed objects such as pallets are conveyed by rollers attached to the chain, the chain conveyor is connected in a straight line, and the roller support plate is integrated with the adjacent sprocket. A chain conveyor characterized in that a large number of rollers are supported in a concentric ring shape around the outer periphery of the roller support plate, and the conveying surface of the rollers provided on the chain is aligned with the top surface of the rollers on the roller support plate. Relay department.