JPH07157026A - Device for changing over rotation of sleeve - Google Patents

Abstract

PURPOSE:To materialize the rotation and stoppage of a carry roller by simple structure, in a roller conveyor. CONSTITUTION:A drive shaft 6 is provided orthogonally to a carrier roller 3 under this roller 3, and a sleeve 7 is set rotatably on this drive shaft 6. An endless belt 12 is laid on the sleeve 7 and the carrier roller 3 in advance. A collar 17 is attached to the drive shaft 6 in the condition that it can rotate in a body, and the outside diameter is made the same as that of the sleeve 7. A rotatable interlocking roller 23 is so arranged as to be pressed against of separate from these peripheries. Only when the interlocking roller 23 is pressed against them, the sleeve 23 follows its rotation, and transmits the torque to the carrier roller 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotation drive switching device for an outer cylinder which can be implemented as a roller drive device for a roller conveyor.

[0002]

2. Description of the Related Art The following conventional roller conveyors are known. That is, the base frame, a large number of rollers rotatably provided on the base frame with the axis centered in the left-right direction, the wheels fitted to the shafts of these rollers, and the wheels hung on these wheels. There is known an endless drive chain, and the roller is rotated by driving the drive chain.

[0003]

Disadvantages of the Prior Art The conventional roller conveyor has the following drawbacks. That is, since all the rollers are rotated by one endless drive chain, the roller conveyor is divided into a plurality of zones along the transport direction, and the rollers are rotated or stopped for each zone. I couldn't do it.
In order to enable such a thing, for example, a motor and an endless drive chain may be separately provided in all zones, and the operation / stop of the motor may be arbitrarily switched for each zone. However, in such a configuration, there is a drawback that the cost increases because a motor is required for all the zones.

[0004]

[Means for Solving the Disadvantages] The present invention adopts the following means in order to eliminate the above disadvantages. That is, the present invention has a drive shaft, an outer insertion cylinder rotatably fitted to the drive shaft, and an interlocking device arranged at one end of the outer insertion pipe. A rotatable interlocking roller having a transmission peripheral surface that simultaneously comes into contact with the outer peripheral surface and the outer peripheral surface of the drive shaft protruding from the outer cylinder, and the interlocking roller abutting against the drive shaft and the outer cylinder. And a position changing mechanism for separating them.

[0005]

The present invention has the following functions. When the position changing mechanism is operated, the interlocking roller comes into contact with the outer insertion tube and the drive shaft projecting to the side of the outer insertion tube at the same time. Is transmitted to the extrapolation tube. If the position changing mechanism is operated again and the interlocking roller is separated from the outer cylinder and the drive shaft, the rotation of the drive shaft is not transmitted to the outer cylinder.

The device of the present invention, in combination with a roller conveyor, an article detector, etc., operates the position changing mechanism of the interlocking roller after detecting the article conveyed on the conveyor and after the article has passed. By doing so, the roller for each zone in the roller conveyor is rotated or stopped, whereby it is suitably used for performing a predetermined operation associated with the presence or absence of an article. Please refer to the examples for specific usage.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the embodiments shown in the drawings. In this specification, the front means the right side of FIG. 1, the rear means the left side of FIG. 1, and the left means the back side of FIG.
Right means the same side. As shown in Fig. 1, the roller conveyor 1
Has a base frame 2 and a large number of transport rollers 3 rotatably provided at predetermined intervals in the front-rear direction so that the axis of the base frame 2 is oriented in the left-right direction. The roller conveyor 1 has a plurality of zones 5 which are sectioned at predetermined intervals longer than the articles W along the transport direction.
There are eight transport rollers 3.

A drive shaft 6 having a rotation axis in the front-rear direction is installed below each of the transport rollers 3 along the base frame 2, and the roller conveyor 1 is used for the drive shaft 6. A motor (not shown) or the like that is in a state and constantly rotates is connected. As shown in FIG. 2, the drive shaft 6 is provided in each zone 5
A rod member 6a having a length corresponding to the above is connected at a position substantially coincident with a division position of each zone 5, and a nipple member 10 is fixed to one side of the connecting portion and the other side is connected to the other side. A socket member 11 that can be connected to the nipple member 10 by screw fitting or the like is fixed. The socket member 11 for each predetermined arrangement is rotatably held by a bearing member (not shown) provided in a hanging shape on the base frame 2. An outer cylinder 7 shorter than the bar 6a is rotatably fitted to each bar 6a via a bearing 9, and both ends (bearing 9) of the outer cylinder 7 are connected via a collar or the like. It is sandwiched between the nipple member 10 and the socket member 11 to prevent movement in the axial direction.

The nipple member 10 is provided with a driven portion 17 on the front side of the portion fitted into the socket member 11 and having a diameter larger than that of the portion and having the same diameter as the outer insertion cylinder 7. The driven portion 17 is adjacent to the front outer cylinder 7 via a collar or the like, but the interlocking device 20 is provided so as to straddle these adjacent portions.

The interlocking device 20 is in the form of a disk having a hole in the center thereof as shown in FIG. 3, and is fitted to the nipple member 10 and the outer insertion cylinder 7 without contacting them, and further the base frame. It has a pair of front and rear oscillating bodies 22 which are vertically swingably held by a bracket 21 attached to the lower part of the second body 2. An interlocking roller 23 is rotatably provided between the lower parts of the rocking bodies 22 by a pivot shaft 24 which is stopped while its axis is oriented in the front-rear direction. The interlocking roller 23 itself is formed of a material having appropriate flexibility (for example, urethane) or a flexible material is attached to the outer peripheral surface thereof. The driven peripheral portion 17) and the outer peripheral surface of the outer insertion cylinder 7 are simultaneously in contact with the outer peripheral surfaces thereof. When the interlocking roller 23 comes into contact with the drive shaft 6 and the outer insertion shaft 7,
The rotation of the drive shaft 6 is transmitted to the outer insertion cylinder 7 via the interlocking roller 23. On the other hand, the brake shoes 19 are stopped between the upper parts of the two rocking bodies 22. The brake shoe 19 is separated from the outer insertion cylinder 7 when the interlocking roller 23 is in contact with the drive shaft 6 and the outer insertion cylinder 7, and from this state, both swinging bodies 22 face downward with the fulcrum portion of the bracket 21 as the center. When the interlocking roller 23 is separated from the drive shaft 6 and the outer insertion cylinder 7 by swinging the outer roller, that is, when the rotation is not transmitted to the outer insertion cylinder 7, the outer contact of the outer insertion cylinder 7 only occurs. To produce the braking action.

A projecting portion 26 is provided on each of the two rocking bodies 22 at a portion opposite to the fulcrum portion of the bracket 21 about the drive shaft 6, and these front and rear projecting portions 26 are provided.
The connecting piece 25 is stopped in between. This connecting piece 25
An operating end of a lifting drive tool 29 such as a fluid pressure cylinder attached to the base frame 2 via a bracket 28 is connected to the. Such a structure constitutes the position changing mechanism 27 in the interlocking roller 23. The position changing mechanism 27 sets the state in which the lifting drive tool 29 is raised to a normal state, and when the lifting drive tool 29 receives an operation signal, a power failure, a power cut, or the like, the lifting drive tool 29 is forced or the rocking body 22 or the like is moved. It is moved downward by an additional load to cause a braking action on the outer cylinder 17.

The transport roller 3 in the last row of each zone 5 (see FIG. 1)
Except for the reference end), the other end of the conveyor roller 3 can be twisted in a manner of winding with the outer insertion tube 7.
2 has been passed over. Therefore, when the outer cylinder 7 rotates, these transport rollers 3 also rotate. A belt winding groove 14 that is deeper than the wall thickness (diameter) of the endless belt 12 is formed on the outer peripheral surface of the transport rollers 3. for that reason,
The lateral displacement of the endless belt 12 with respect to the transport roller 3 does not occur, and even when the article W passes over the transport roller 3, the bottom surface of the article W does not interfere with the endless belt 12. On the other hand, the endless belt 13 is stretched over the transport roller 3 in the last row between the transport roller 3 in the immediately preceding row. As shown in FIG. 3, the belt winding groove 15 is also formed on the outer peripheral surfaces of both the transport rollers 3 in the last row and the row immediately before that in the same manner as described above.

As shown in FIG. 1, an article detector 30 is provided at the front position of each zone 5 in the base frame 2. The article detector 30 may be a transmissive or reflective sensor that uses signals such as light, radio waves, or sound waves, or mechanical switches that are brought into contact with the article W. When the article W is detected by the article detector 30, the position changing mechanism 27 is operated in the zone 5 on the subsequent side of the zone 5 to which the article detector 30 belongs (the lifting drive tool 29 is moved downward).
It is supposed to do. And the article detector 30 is the article W
If no longer detected, the repositioning mechanism 2 in the subsequent zone 5
7 restores to the initial state (the lifting drive tool 29 moves upward).

[0014]

Operation of the Embodiment Next, the operation of the embodiment will be described. In a state where all the article detectors 30 do not detect the article W, all the lifting drive tools 29 are in the raised state, and the interlocking rollers 23
Is in contact with the drive shaft 6 and the outer insertion shaft 7, the outer insertion cylinder 7
Is rotating, and all the conveying rollers 3 in all zones 5 are also rotating. When the article detector 30 detects the article W being conveyed,
Zone 5 on the trailing side of zone 5 with the article detector 30
The ascending / descending driving tool 29 of FIG. Therefore, in the subsequent side zone 5, the interlocking roller 23 separates from the drive shaft 6 and the outer insertion shaft 7, and the brake shoe 19 abuts on the outer insertion cylinder 7. The rotation stops. That is, the succeeding article W is temporarily stopped before colliding with the article W immediately ahead.
Therefore, the article W does not push the front article W or collide with the front article W. Further, since the braking action of the outer insertion cylinder 7 is derived from the endless belts 12 and 13 to the stopped transport roller 3, the article W does not move forward by inertia. When the transport roller 3 in the zone 5 immediately after the succeeding zone 5 is rotating, it goes without saying that the article W in the zone 5 immediately after the succeeding zone 5 is fed forward. When the article W in the front zone 5 is sent out, the lifting drive tool 29 in the zone 5 on the trailing side is moved upward, and the article W temporarily stopped as described above is sent forward again.

In the present invention, the drive shaft 6 does not have to be formed by connecting a plurality of rod members 6a, but an integral long rod member may be used. Further, it is possible to eliminate the driven portion 17, and in this case, a stepped structure may be adopted so that the interlocking roller 23 can directly contact the drive shaft 6. Further, instead of forming the belt winding grooves 14 and 15 on the transport roll 3, a wheel may be attached outside the article transport region. The device of the present invention can be implemented in various devices and the like as a mechanism for rotating the drive shaft 6 at all times, and rotating the outer cylinder 7 to follow the rotation of the drive shaft 6 or to stop it.

[0016]

The present invention has the following effects due to the above-mentioned configuration. With the extremely simple structure in which the interlocking roller is simultaneously brought into contact with or separated from the drive shaft and the outer cylinder fitted thereto, it is possible to switch between rotation and stop of the outer cylinder. It was When this invention is carried out in combination with a roller conveyor and an article detector, noise is reduced as compared with chain transmission, and only the rotation of a desired roller is simplified without unnecessarily increasing the number of motors. Because it can be stopped at low cost.

[Brief description of drawings]

FIG. 1 is a side sectional view of an essential part showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view showing a part II of FIG. 1 with a part cut away.

FIG. 3 is an enlarged sectional view taken along line III-III of FIG.

[Explanation of symbols]

 6 Drive shaft 7 Outer tube 20 Interlocking device 23 Interlocking roller 27 Position changing mechanism

Claims (1)

[Claims] 1. A drive shaft, an outer insertion barrel rotatably fitted to the drive shaft, and an interlocking device arranged at one end of the outer insertion barrel. The interlocking device has an outer periphery of the outer insertion barrel. Surface and the outer peripheral surface of the drive shaft that protrudes from the outer cylinder at the same time, and a rotatable interlocking roller that has a transmission peripheral surface that abuts and separates from the drive shaft and the outer cylinder. A rotation drive switching device for an extrapolation cylinder having a position changing mechanism.