JPH0622651Y2 - Roller conveyor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a conveyor for conveying articles, and more particularly to a roller conveyor having a plurality of conveyance rollers for conveying articles.

[Prior Art] An example of the above-mentioned roller conveyer that rotates a plurality of conveyance rollers to move an article on the conveyance rollers is disclosed in Japanese Patent Application Laid-Open No. 47-9223. However, in such a conventional roller conveyor, a time for processing the cardboard box or other articles on a line for performing film packaging work or a boxing industry, or the processing time for preceding articles is earned. Therefore, there is a problem that it is not possible to temporarily stop the subsequent article.

On the other hand, for example, Japanese Unexamined Patent Publication No. 50-138583 discloses a structure in which two transmission wheels press the grooved wheel by an elastic coil spring. According to this structure, if the movement of the article to be temporarily stopped is stopped by some means, the contact surface between the transmission wheel and the groove wheel idles, and the article remains in the stopped state. But,
Since the transmission wheel and the grooved wheel are kept in contact with each other, the power transmission from the drive motor to the conveyance roller is not completely cut off, and the means for stopping the article is operated, or the worker removes the article. It was not possible to stop the movement of the article unless it stopped. In the prior art, no roller conveyor has been devised that completely blocks the rotation of some of the transport rollers from the drive means.

Japanese Utility Model Laid-Open No. 60-26446 discloses a structure in which a roller shaft is moved up and down in a groove so that the roller shaft is free. The pressure of the roller is controlled by its own weight. The transfer cannot be interrupted.

Further, Japanese Utility Model Laid-Open No. 49-27188 discloses a technique of moving a belt from a roller to interrupt the transmission of a rotational force to the roller. However, in such a known technique, the belt and the roller come into contact with each other, and therefore, when the span of the belt becomes long, the belt is bent, the contact pressure becomes non-uniform, and flip is apt to occur.

[PROBLEMS TO BE SOLVED] Accordingly, an object of the present invention is to provide a roller conveyor that can cut off the transmission of rotational force to a long range of conveying rollers of a part of the roller conveyor, and that does not cause uneven transmission of rotational force. There is.

[Means for Solving the Problems] According to the present invention, in a roller conveyor having a plurality of conveying rollers (12), a plurality of fixed rollers (14) and a plurality of free rollers (16) are provided below the conveying rollers (12). Are alternately arranged, and the rotational force is transmitted from the driving means (20) to the fixed roller (14) and the free roller (16) through the winding transmission means (18), and the free roller (16) is The two transfer rollers (12) are rotated by frictional transmission in contact with the two transfer rollers (12),
The free roller (16) is supported by a winding transmission means (18) so as to be vertically movable, and has its rotating shaft (8).
0) is supported by a universal joint (17), and further free rollers (16A, 16B) separated from the transport roller (12) by a moving member (30) are provided, and the moving member (30) is a piston / cylinder. Member (32, 34)
And one end is connected to the metal fitting at the tip of the piston and the other end is the first
An arm (36) connected to one end of the rotary shaft for rotating the rotary shaft in response to expansion and contraction of the piston, and the first rotary shaft (38) having one end connected to the arm (36).
The second rotary shaft (38) is fixed to the first rotary shaft (38) and held by the second rotary shaft (42) for the free roller, and corresponds to the rotation of the first rotary shaft (38). 42) and a connecting member (40) for moving the other free rollers (16A, 16B) up and down.

[Advantageous effects of the invention] According to the roller conveyor of the present invention having such a configuration,
When the article is conveyed, the rotational force from the driving means such as the motor is transmitted to the free roller by rotating the winding transmission means, and the conveyance roller in contact with the free roller is rotated to convey the article. Then, when temporarily stopping the conveyed article, the moving member is operated to move the other free roller to completely separate the conveying roller and the other free roller to interrupt the friction transmission between the two. As a result, the rotational force of the transport roller is lost, and as a result, the article is stopped.

In the present invention, when the article is temporarily stopped, the conveying roller and the other free roller are completely separated from each other, so that the power (rotational force) transmission system from the driving means to the conveying roller is completely cut off. Therefore, the rotational force is not transmitted from the outside to the transport roller, and the article can be stopped easily. Further, by providing moving means for moving another free roller at various positions, it is possible to cut off the transmission of the rotational force to the conveying roller at the desired position of the article.

The rotational force is transmitted to the two adjacent conveying rollers by the free roller provided between the two fixed rollers moving up and down by the winding transmission means, so that the winding transmission means is held by the fixed rollers and The contact force between the rollers is substantially uniform, slippage does not occur in a part, and the rotational force is rationally transmitted.

Further, the free roller is provided with a universal joint so as not to be displaced in the axial direction as much as possible when it is moved up and down by the winding transmission means.

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

1 and 2, the roller conveyor of the present invention, generally designated by the numeral 10, has a plurality of conveying rollers 12, below which fixed rollers 14 and free rollers 16 are alternately arranged. There is. Rotational force is transmitted to the fixed roller 14 and the free roller 16 from a driving means 20 such as a motor via a winding transmission means 18 such as a belt. The free roller 16 is the two transport rollers 12
And the two transport rollers 12 rotate by frictional transmission. Here, the rotary shaft 80 of the free roller 16 is supported by the frame F via a universal joint 17 having two link balls 17A, 17A built therein.

The articles M1, M to be conveyed are placed on the conveyance roller 12.
2 and M3 (Fig. 1) are on board, and the articles M1 and M
2, M3 are conveyed rightward in FIG. 1 as the conveying roller 12 rotates. Here, the transport roller 12 is rotating clockwise, that is, in the direction of arrow C in FIG.

In FIGS. 1 and 2, reference numeral 30 generally indicates a moving member for separating the free roller 16 from the transport roller 12 and stopping the rotation of the predetermined transport roller 12. In FIG. 1 and FIG. 2, the article M2
Only the moving member 30 for stopping the rotation of the rollers 12A, 12A in contact with (Fig. 1) and the rollers 12B, 12B in contact with the article M3 is shown, but a plurality of such moving members 30 should be provided. You can

The moving member 30 includes a cylinder 32 and a piston 34, and a piston tip fitting 35 is attached to the piston 34. An arm 36 is connected to the piston tip fitting 35, and the arm 36 is connected to the first rotating shaft 38. It is connected to one end, and when the piston tip fitting 35 extends in the direction of arrow A, the first rotating shaft 38 is rotated in the direction of arrow B in FIG. A connecting member 40 is fixed to the first rotating shaft 38, and the connecting member 40 further holds a second rotating shaft 42. The second rotary shaft 42 is the central axis of the free roller 16A, and the free roller 16A is in contact with the two rollers 12A, 12A below the article M2 whose conveyance should be stopped.

When the moving member 30 is actuated to stop the rotation of the transport rollers 12A and 12A to stop the transport of the article M2, first, a working fluid such as air is injected into the cylinder 32 to move the piston tip fitting 35 in the arrow A direction. Extend. As a result, the arm 36 and the first rotation shaft 38 rotate in the direction of arrow B,
At the other end of the first rotary shaft 38, the connecting member 40 and the second rotary shaft (center axis of the free roller 16A) 42 are provided.
Rotates in the direction of arrow D (FIG. 1). As a result, the free roller 16A moves downward in FIG. 1 to be completely separated from the transport rollers 12A, 12A, the transmission of the rotational force from the driving means 20 is interrupted, and the rotation of the transport rollers 12A, 12A is stopped. .

In the embodiment shown in FIGS. 1 and 2, by moving the moving member 30, the conveying rollers 12A, 1A,
The transport roller 12 that is in contact with not only 2A but also the article M3
The B and 12B are also configured to stop rotating at the same time. That is, the connecting members 40, 40 are connected to the interlocking links 44, 44 via the bolts 43, 43, and the interlocking links 44, 44 are connected to the second connecting members 48, 48 via the bolts 46, 46. Connected. The second connecting members 48, 48 integrally connect the interlocking links 44, 44 and the rotating shaft 50, which is the central shaft of the free roller 16B. Here, the free roller 16B is the article M.
3 is in contact with the conveying rollers 12B and 12B located below the sheet.

When the operating member 30 is transmitted and the rotary shaft 42 moves downward in FIG. 2 as described above, at the same time, the interlocking link 4
The central axis 50 of the free roller 16B also moves downward via the fourth and fourth connecting members 48 and 48. As a result, the free roller 16B and the transport rollers 12B, 12B are separated from each other, the rotation of the transport rollers 12B, 12B is stopped, and the transport of the article M3 is stopped.

As described above, according to the embodiment shown in FIGS. 1 and 2, the conveyance rollers 12A, 12A, 12B, 12B are stopped from rotating at predetermined positions where the moving member 30 is provided, and the articles M2, M3 are conveyed. Can be stopped. But,
In order to more surely stop the rotation of the transport rollers 12A, 12A, 12B, 12B, braking members 60A, 60B as shown in FIG. 3 may be provided at locations indicated by reference symbol E in FIG. The braking members 60A, 60B are pads 62A, 62B made of urethane rubber or the like, and air cylinders 66 in which columns 64A, 64B of the pads are fitted.
A and 66B. And the free roller 16
In synchronization with the lowering of A and 16B, the air cylinder 66
The working fluid flows into A and 66B and pads 62A and 62B
Rises to come into contact with the transport rollers 12A, 12A and 12B, 12B, respectively.

Here, in the illustrated embodiment, the member designated by reference numeral 70 (FIG. 1) is a cylinder member for adjusting the tension generated in the winding transmission means 18 when the free rollers 16A and 16B are lowered.

Although the moving member 30 is provided only at one place in the illustrated embodiment, a plurality of moving members 30 can be installed at desired positions.
The number of free rollers 16 lowered by the moving member 30 may be one or three or more. Further, the number of the transport rollers 12 contacting the free rollers 16 is not limited to two, and the number of the transport rollers contacting the transported article is not limited to two. Further, the conveying direction of the articles M1, M2, M3 and the moving direction of the free roller 16 are not limited to those shown in the drawings.

[Effect of Device] As described above, the present invention has the following excellent effects.

(I) Since the rotational force to the conveying roller is transmitted from the fixed roller to the conveying roller via the winding transmission means and the free roller, the contact force does not become non-uniform due to the bending of the winding transmission means.

(Ii) Slip does not occur even if the rotation of the transport roller is stopped over a long range.

(Iii) Since it is possible to reliably stop the conveyance of articles over a long range, it is possible to widen the work range on the line and improve work efficiency.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention, FIG. 2 is a plan view of the embodiment, and FIG. 3 is a front view of a braking member additionally used in the present invention. 10 ... Roller conveyor, 12, 12A, 12B ... Conveying roller, 18 ... Winding transmission means, 30 ... Moving member,
M1, M2, M3 ... Goods

Claims (1)

[Scope of utility model registration request] 1. A roller conveyor having a plurality of transport rollers (12), wherein a plurality of fixed rollers (14) and a plurality of free rollers (1) are provided below the transport rollers (12).
6) are alternately arranged, and the rotational force is transmitted from the drive means (20) to the fixed roller (14) and the free roller (16) through the winding transmission means (18), and the free roller (16). Is brought into contact with the two transport rollers (12) to rotate the two transport rollers (12) by frictional transmission, and the free roller (16) is supported by the winding transmission means (18) so as to be vertically movable. , And its axis of rotation (8
0) is supported by a universal joint (17), and further free rollers (16A, 16B) separated from the transport roller (12) by a moving member (30) are provided, and the moving member (30) is a piston / cylinder. Member (32, 34)
And one end is connected to the metal fitting at the tip of the piston and the other end is the first
An arm (36) connected to one end of the rotary shaft for rotating the rotary shaft in response to expansion and contraction of the piston, and the first rotary shaft (38) having one end connected to the arm (36).
The second rotary shaft (38) is fixed to the first rotary shaft (38) and holds the second rotary shaft (42) for the free roller and corresponds to the rotation of the first rotary shaft (38). 42) and a connecting member (40) for vertically moving the other free rollers (16A, 16B).