JPH062973Y2 - Drive roller conveyor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a roller conveyor driven by a line shaft, and more particularly to a drive roller conveyor equipped with a floating branching device for branching articles. Is.

[Prior Art] Although there are various types of conventional drive roller conveyors, a conveyor having a belt between a line shaft and each roller is known as having a low transport load. For example, in Japanese Unexamined Patent Publication No. 49-57582, an endless belt is struck between a line shaft arranged along the longitudinal direction of a frame and a plurality of rollers arranged side by side between the frames. The rotation of the roller is transmitted to the roller, and the rotation of the roller causes the article to be conveyed along the path constituted by the frame and the plurality of rollers.

[Problems to be Solved by the Invention] Such a conventional drive roller conveyor is excellent in that it does not cause line pressure due to slippage between belts when accumulating an article, but the article is regarded as a path. Despite the demand for bifurcation in the orthogonal direction, no suitable device has been developed.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above problems and to provide a drive roller conveyor that can surely branch an article in a direction orthogonal to a traveling direction.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a drive roller conveyor in which a number of drive rollers are mounted side by side on a frame and a drive belt is hung between the line shaft and the drive rollers. In a branch position of the conveyor, a support frame that is vertically movable, a plurality of branch belts that are transmitted from a line shaft and that travel to a drive roller gap at the branch position on the upper surface of the support frame, and a lower part of the support frame. An elevating cylinder for raising the branching belt above the running surface of the drive roller at the time of branching, and a running direction forward / backward switching means for the branching belt, wherein the forward / backward switching means is a line shaft. A drive gear provided with a shunting belt, a driven gear having a branch belt pulley, an intermediate gear constantly engaged with the driven gear, and either the driven gear or the intermediate gear. It is characterized by comprising a switching cylinder that meshes with a dynamic gear.

[Operation] In the drive roller conveyor of the present invention, the supporting frame is raised by the elevating cylinder only when branching is required, the branching belt is taken out above the drive roller running surface, and the article is branched perpendicularly to the traveling direction. By operating the traveling direction forward / reverse switching means of the branching belt, the article can be branched in either the left or right direction orthogonal to the traveling direction. When the branch is not required, the supporting frame is lowered by the lifting cylinder. When branching is not required as described above, the switching means is operated to hold the driven gear and the intermediate gear in a neutral position where they do not engage with the driving gear, thereby stopping the traveling of the branching belt. It is something to put.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

As shown in the plan view of the driving roller conveyor in FIG. 1, a large number of driving rollers 2 are arranged side by side between frames 1 and 1,
Line shaft 3 is installed along the inside of frame 1,
A drive belt 4 is laid between the drive roller 2 and the line shaft 3.

A floating branching device 6 is installed in the gap between the drive rollers 2. The floating type branching device 6 will be described with reference to FIGS. 2 to 4.

The protruding type branching device 6 is a base provided between the frames 1 and 1.
20, a lift cylinder 7 standing upright in the center of the base 20, a drive roller having the same pitch as the drive roller between the frames 1 and 1, and a support frame 8 that is lifted and lowered by the lift cylinder 7.
A two-branch belt 9 that travels in the gap between the drive rollers 2 at the branch position and is transmitted from the line shaft 3, a branch roller 10 that guides the forward side of the branch belt 9, and a presser foot that guides the return side. And a roller 11. Further, as shown in FIG. 4, in order to give the branching belt 9 tension, an arm 16 is rotatably attached to the tips of a pair of brackets 13 fixed to the upper surface of the base 20. A take-up pulley 17 is provided on the above to guide the branching belt 9. The arm is supported by a torsion spring 15 installed on the shaft 14 supporting the arm 16.
Since 16 is always urged to rotate clockwise in Fig. 2,
The take-up pulley 17 is also constantly pushed down, pulling the branching belt 9 to give tension.

On the lateral side of the support frame 8, there is provided a branching belt running direction forward / reverse switching means 21 for branching the article carried by the drive roller 2 to the left or right at the branching position.

As shown in FIGS. 2 and 3, the forward / reverse switching means 21 meshes with a driving gear 22 provided on the line shaft 3, a driven gear 23 having a branch belt pulley 33, and a driven gear 23 at all times. It is composed of an intermediate gear 24 and a switching cylinder 25 that meshes either the driven gear 23 or the intermediate gear 24 with the driving gear 22.

The driven gear 23 and the intermediate gear 24 are rotatably supported on one side of a triangular plate 27 supported by a fulcrum 28.
The other end of 27 is pin-jointed to the piston rod 26 of the switching cylinder 25. 2 and 3, as the piston rod 26 extends and the plate 27 rotates counterclockwise about the fulcrum 28, the driven gear 23 directly meshes with the driving gear 22 to drive the branching belt 9. It shows the state of doing.

Next, the operation of the above device will be described.

First, when there is no need for branching, the floating branching device 6 is lowered as shown by the chain line in FIG. Meanwhile, the stroke of the switching cylinder 25 is adjusted to adjust the intermediate gear 24 and the driven gear.
The traveling of the branching belt 9 is stopped by stopping the plate 27 at a neutral position (not shown) in which none of the gears 23 meshes with the driving gear 22. The supporting frame 8 is guided by the elevating guide 12 so as not to be tilted, and the supporting frame 8 is lowered by the elevating cylinder 7, so that the branching belt 9
Is lowered below the running surface of the drive roller 2. At this time, the arm 16 rotates about the axis 14 ', the take-up pulley 17 also descends, and the downward force of the torsion spring 15 is exerted, so that the take-up pulley 17 moves to the branch belt 9.
The diverging belt 9 is stretched downward so that slack does not appear on the running surface of the pulled article. The rotation from the line shaft 3 is transmitted to the branching belt 9 and the branching belt 9 rotates, but the branching device 6 descends below the traveling surface of the drive roller 2, so that the conveyed article is not branched. Drive on the drive roller 2.

When branching is required, the floating branching device 6 installed in the gap between the drive rollers 2 is floated. First, the elevating cylinder 7 is lifted while the branching device 6 is guided by the elevating guide 12 so as not to be tilted to the left and right and front and rear, and the support frame 8 is raised. As the support frame 8 rises, the two branching belts 9 installed on the upper surface of the support frame 8 come out above the traveling surface of the drive roller 2. The branching belt 9 is looped between the branching roller 10 that guides the forward side and the line shaft 3, and tension is applied by the take-up pulley 17 so that the branching belt 9 is stretched without slack. The branching belt 9 is driven by the driving force of the line shaft 3.
Runs.

Forward direction (right side branch road in Fig. 1) perpendicular to the traveling direction of the article
When branching to 30), as shown in FIG. 5, the piston rod 26 is reduced by the switching cylinder 25, and the fulcrum 28
The triangular plate 27 is rotated around, and the intermediate gear 24 and the driving gear 22 are meshed with each other. The clockwise driving force of the line shaft 3 is transmitted from the driving gear 22 to the intermediate gear 24 to reverse the rotation, and further transmitted from the intermediate gear 24 to the driven gear 23 so that the rotation is in the same direction as the line shaft 3. By the clockwise rotation transmitted to the branching belt 9, the article is branched in the forward direction.

In the case of branching the article in the opposite direction (left branch path 31 in FIG. 1) orthogonal to the traveling direction, the piston rod 26 is operated to the lift side by the switching cylinder 25, so that the articles shown in FIGS.
As shown in the drawing, the triangular plate 27 is rotated upward about the fulcrum 28, and the driven gear 23 and the driving gear 22 are meshed with each other. The rotation from the line shaft 3 is transmitted from the driving gear 22 to the driven gear 23, the rotation is reversed, and the rotation is transmitted to the branch belt 9.
The branching belt 9 transmitted in the opposite direction to the rotation of the line shaft 3 branches the article in the opposite direction.

Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to these embodiments. For example, in the embodiment, the number of branching belts 9 is two, but three.
It may be Article 4, Article 4, etc.

[Advantages of the Invention] As described above, in the drive roller conveyor of the present invention, the diverging device is installed in the roller gap, so that the diverging device is levitated when necessary and the roller traveling direction is changed. The article can be branched in a direction orthogonal to it.
Further, since the forward / reverse switching means for the traveling direction of the branching belt is attached to the line shaft, the article can be branched in both forward and reverse directions orthogonal to the traveling direction without changing the rotation direction of the line shaft. Moreover, when branching is not necessary, the intermediate belt and the driven gear are both held in the neutral position where they do not mesh with the driving gear, so that the running of the branching belt is stopped and the life of the branching belt is maintained for a long time. it can.

[Brief description of drawings]

1 is a plan view of a drive roller conveyor, FIG. 2 is a front view of a floating type branching device, FIG. 3 is a side view taken along line III-III of FIG. 2, and FIG. 4 is IV of FIG. Fig. 6 is a side view taken along line IV-Fig. 5, and Fig. 5 is a skeletal front view of the forward / reverse traveling switching means of the branching belt.
The figure is also a front view at the time of switching. DESCRIPTION OF SYMBOLS 1 ... Frame, 2 ... Drive roller, 3 ... Line shaft, 4 ... Drive belt, 6 ... Elevating branch device, 7 ... Lifting cylinder, 8 ... Support frame, 9 ... Branch belt, 10 ... Branch roller, 11 ... Presser roller, 12 ... Guide, 13 ... Bracket, 14 ... Shaft, 15 ... Torsion spring, 16 ... Arm, 17 ... Take-up pulley, 21 ... Forward / reverse switching means, 22 ... Driving gear, 23 ... Driven gear, 24 ... Intermediate gear, 25 ... switching cylinder, 27 ... triangular plate.

Claims (1)

[Scope of utility model registration request] 1. A drive roller conveyor in which a large number of drive rollers are arranged side by side on a frame, and a drive belt is hung between a line shaft and the drive rollers, and the support is vertically movable at a branch position of the conveyor. A plurality of branch belts that are transmitted from the frame and the line shaft and that travel in the drive roller gaps at the branch position on the upper surface of the support frame, and are provided under the support frame and are raised at the time of branch to drive the branch belt. It has an elevating cylinder that floats above the traveling surface of the roller, and a traveling direction forward / reverse switching means for the branching belt, wherein the forward / reverse switching means comprises a driving gear provided on the line shaft and a branching belt hanging pulley. Driven gear, an intermediate gear that constantly meshes with the driven gear, and a switching cylinder that meshes either the driven gear or the intermediate gear with the driving gear. Drive roller conveyor featuring ruco.