JPH0644890Y2 - Roller conveyor for curved paths - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to a roller conveyor for a curved path that supports and conveys a bucket containing a load and the load itself in the curved path.

2. Description of the Related Art Conventionally, as a roller conveyor of this type, a structure disclosed in, for example, JP-A-60-12406 is provided. In this conventional structure, a plurality of taper rollers are rotatably arranged on the curved side of the frame, and these taper rollers have their roller shafts fixed on the frame side. It is horizontal and its roller axis is inclined. Furthermore, a flange is provided on the large diameter side of each taper roller, an endless belt whose action path side is located outside this flange is hung between the taper rollers from above, and the return path side of the endless belt is lowered to the drive wheel of the motor. I am hanging from.

According to this conventional type, the driving force of the motor is transmitted to the endless belt via the drive wheel, and the taper rollers are rotated by the movement of the endless belt, whereby the conveyed article can be conveyed in the curved path.

Problems to be Solved by the Invention According to the above conventional method, in order to stop the load on the curved path, it is conceivable to provide a stopper that can move back and forth on the curved path. Then, the taper roller rotates in sliding contact with the load, resulting in damage to the load and noise. It is also conceivable to stop the operation of the motor, but this requires frequent operation and stop, which complicates control, and stops multiple loads on the curved path in an orderly manner without collision. It is not possible.

The object of the present invention is for a curved path that can be stopped by a simple control without damaging the load on the curved path, and even if there are multiple loads, it can be stopped orderly without collision. The point is to provide a roller conveyor.

Means for Solving the Problems To achieve the above object, a roller conveyor for a curved path according to the present invention is provided with a curved body frame side,
A plurality of taper rollers are rotatably arranged.These taper rollers have a small diameter on the curved center side and have a horizontal conveying surface, and are arranged with their roller axes inclined, below one end side of each taper roller. A transmission unit is provided that is interlocked with the drive unit and can be connected to and separated from the taper roller.The transmission unit is attached to the main body frame side along the roller axis so that it can move up and down. A movement imparting device for moving, a passive wheel body rotatably and axially slidably mounted on the support shaft, and always linked to the driving body, and a passive wheel body integrated with the passive wheel body and abutting on the taper roller. It is composed of a transmission roller that can be freely contacted and separated.

According to the structure of the present invention, the movement imparting device causes the support shaft to swing upward and the transmission roller to contact the taper roller, whereby the moving force of the driving body is transmitted from the passive wheel body to the taper roller via the transmission roller. As a result, the taper roller is forcibly rotated and the object to be conveyed can be conveyed on the curved path.
The movement imparting device swings the support shaft downward to separate the transmission roller from the taper roller, so that the moving force of the driving body is not transmitted to the taper roller, so that the taper roller is stopped and the conveyed object is moved along the curved path. You can stop at. Therefore, by controlling the operation of the movement imparting device, one or a plurality of objects to be conveyed can be stopped on the curved path. Also, since the passive wheel slides in the axial direction of the support shaft as the support shaft swings up and down, this vertical swing of the support shaft is not possible while always maintaining the passive wheel body in conjunction with the driving body. Done without.

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

As shown in FIGS. 4 and 5, the roller conveyor device 100
Consists of a straight conveyor 102 located on the upper side to form a straight path 101 and a curved conveyor 104 located on the lower side to form a curved path 103. And straight conveyor 102
A carry-in side conveyor 106 that forms a straight line path 105 is arranged on the upper side, and a carry-out side conveyor 108 that forms a straight line path 107 is arranged on the lower side of the curve conveyor 104.
Therefore, by using the 90-degree curve conveyor 104, the entire conveyance direction can be changed to 90 degrees. However, the conveyance direction is arbitrary by adopting the curve conveyor 104 having different curve angles, for example, changed to 60 degrees, and by combining two 90 degree ones,
Curved paths can also be formed over time.

Next, details of the curve conveyor 104 will be described with reference to FIGS.

1 is a main body frame having a concave cross section, which is a pair of left and right side frames 1A, 1
B and a base frame 1C connecting the lower parts of the side frames 1A and 1B. Here, the side frames 1A and 1B are curved and formed over 90 degrees in a plan view. L-shaped guide portions 2A, 2B are formed on the inner surface sides of the side frames 1A, 1B facing each other, and these guide portions 2A, 2B include horizontal receiving surfaces 3A, 3B and upright inclined mounting surfaces 4A, 2B. It consists of 4B. Here, the mounting surfaces 4A and 4B are inclined so as to be inward toward the upper side. Both side frames 1A, 1B
The dovetail groove portions 6A and 6B which allow the nut bodies 5A and 5B to slide are formed on the upper part of the so as to be open toward the mounting surfaces 4A and 4B. Further, on one side frame 1A, a guide body 8 is arranged in the length direction of the frame on the inner surface side of an intermediate portion thereof via a mounting portion 7.

The one side frame 1A is provided with a resin support frame 10 supported and guided by the guide portion 2A. The support frame 10 has a case-like shape, and a substrate portion 11 attached to the guide portion 2A.
And a pair of front and rear cover plate portions 12 continuously provided from the inner surface of the lower half of the substrate portion 11 toward the inside, and a connecting plate portion 13 provided between the lower ends of the cover plate portions 12. Then, the lower end of the base plate portion 11 is brought into contact with (fitted to) the receiving surface 3A, the outer surface 11a thereof is brought into contact with the mounting surface 4A, and then the bolt passed from the inside into the mounting hole 14 formed in the intermediate portion.
With the structure in which 15 is engaged with the nut body 5A, the support frame is
10 can change the position (sliding) freely in the frame length direction,
And it is fixed in the changed position. A roller support hole 16 is formed near the upper end of the substrate portion 11. 17A and 17B show guide frames.

A vertical position adjusting device 20 is provided on the other side frame 1B. That is, the main body 21 of the position adjusting device 20 corresponds to the other supporting frame, the outer surface 21a of which can be freely abutted against the mounting surface 4B, and the inner surface side of the locking groove is open upward and inward. 22 are formed. This locking groove 22
Vertical holes 23 are formed on both sides of the main body 21 in the longitudinal direction of the frame by a structure in which bolts 24 passed from the inside of the long holes 23 are fitted to the nut body 5B. It can be changed and lifted up and down, and it is fixed in the changed position. Further, the outer surface 21a of the main body 21 has a recess 2
5 is formed, and the nut member 26 is fitted into the recess 25 from the outside. As for the screw shaft 27 fitted to the nut member 26, the head portion 27a at the upper end thereof serves as an operating portion, and the lower end portion 27b thereof can come into contact with the receiving surface 3B.

A taper roller 31 is rotatably provided between the support frame 10 and the position adjusting device 20 via a roller shaft 30. That is, one end of the roller shaft 30 inserted so as to be relatively rotatable is inserted into the roller support hole 16, and the other end is dropped into the locking groove 22 from above, whereby the roller shaft 30 can be attached, and further the support frame 10
The taper roller 31 with the small diameter part on the
It becomes free to rotate around.

A support shaft 41 along a roller shaft center 32 is attached to the support frame 10 so as to be vertically swingable. That is, the bearing hole portion 42 is formed in the lower portion of the base plate portion 11, and the inner end of the support shaft 41 is fitted into the bearing hole portion 42 so as to be vertically swingable. And the cover plate part
An L-shaped plate portion 43 made of resin is inserted between the free ends of 12 to be attached, and an outer end of the support shaft 41 is fitted into a vertical recess formed in a vertical plate of the L-shaped plate portion 43. The vertical swing range of the support shaft 41 is restricted. A sprocket 44, which is an example of a passive wheel, is rotatably and slidably attached to the support shaft 41 in the axial direction of the support shaft 41. Ie sprocket 44
Has a gap 61 between the outer end side and the inner surface 11b of the base plate portion 11 and a cylinder rubber receiver (described later) on the inner end side.
A gap 62 is formed between the gap and the gap so that the gap can be slid in the axial direction 63 by utilizing the gaps 61 and 62. Then, the transmission roller 45 is externally fitted to the boss portion of the sprocket 44 so that the two 44, 45 can be integrally rotated. The transmission roller 45 is made of urethane rubber, and the outer periphery of the transmission roller 45 can be brought into contact with and separated from the lower portion of the outer periphery of the taper roller 31. An air cylinder device 46, which is an example of a movement imparting device that acts on the support shaft 41 to bring them into contact with each other, includes a cylinder rubber receiver 47 attached to the outer end of the support shaft 41 and a horizontal plate of the L-shaped plate portion 43. It is interposed between. Further, a receiving plate 49 is continuously provided inwardly from the upper end of the vertical plate of the L-shaped plate portion 43 via a fixture 48 such as a bolt, and between the lower surface of the receiving plate 49 and the upper surface of the cylinder rubber receiver 47. Further, a compression spring 50, which is an example of a biasing member that pushes down and supports the support shaft 41, is interposed. The above 41 to 50 form one transmission unit 40, and this transmission unit 40 is a support frame.
A large number of them are arranged on the main body frame 1 as one set with the taper roller 31 through the 10 and the position adjusting device 20.

The straight conveyor 102 has the same structure as the curved conveyor 104, except that the straight roller 35 is used instead of the taper roller 31 as shown in FIG. 3, and one side frame 1A is provided. The mounting surface 4A is formed in a vertical shape, and the return guide body 36 is disposed below the upward guide body 8. On the other side frame 1B,
A rectangular plate-shaped support frame 37 is attached by being attached to a vertical mounting surface 4B. The carry-in side conveyor 106 and the carry-out side conveyor 108 are also configured in the same manner as the straight conveyor 102.

As shown in FIGS. 4 and 5, the conveyors 102 and 104 are integrated by connecting the body frames 1 and 1, and are installed at a predetermined level on the floor 110 via a plurality of legs 109. To be done. The two main body frames 1 and 1 can be integrated without being connected by, for example, bending the halves after extrusion molding of aluminum.

The drive unit commonly used for both conveyors 102, 104 is composed of a chain 51, which is a common drive unit that interlocks with each sprocket 44, and a drive unit 52 that interlocks with this chain 51. That is, the chain 51 is stretched over the upper driven sprocket 53 provided at the upper end of the linear conveyor 102 and the lower driven sprocket 54 provided at the lower end of the curve conveyor 104.
The guide member 8 is supported and guided in the action path that meshes with the sprocket group 44. Further, in the straight conveyor 102 portion of the return path (return path), the guide member 36 is provided.
In the portion of the curve conveyor 104, it is supported and guided by the curve guide body 55 having a radius smaller than that of the curve path 103.

As described above, the taper roller 31 and the straight roller 35 paired with the transmission unit 40 and the like as described above have a plurality of grooves A to G arranged in a predetermined array as a group. And is controlled for each group. Here, in the group, the carry-in side conveyor 106 is A and B,
Although the straight conveyor 102 is shown as C, the curve conveyor 104 is shown as D and E, and the carry-out conveyor 108 is shown as F and G, the carry-in conveyor 106 and the carry-out conveyor 108 have a larger number of groups, and the curve The conveyors 104 can be changed, such as one group. In each group A to G, the supply / discharge hose 70 connected to the air cylinder device 46 group
Is selectively connectable and separable to an air supply hose 73 from an air supply device 72 via an electromagnetic valve 71. Each group A to G is provided with an in-vehicle detector 74 such as a photoelectric type. Reference numeral 75 denotes a bucket which is an example of the transported object.

In the above embodiment, the taper rollers 31 are arranged (assembled)
Prior to this, the support frame 10 having the transmission unit 40 and the position adjusting device 20 are first attached. Ie support frame 10
Is fitted into the receiving surface 3B of the lower end of the base plate portion 11, the outer surface 11a is brought into contact with the mounting surface 4A, and the bolt 15 passed through the mounting hole 14 is engaged with the nut body 5A to be tightened. Can be fixed to. At this time sprocket 44
Engages the chain 51 supported by the guide body 8 from above. Further, since the attachment surface 4A of the transmission unit 40 is inclined, the transmission unit 40 is inclined so that the free end side becomes lower at the same time as it is attached. The other position adjusting device 20 can be fixed to the side frame 1B by fitting the bolt 24 passed through the long hole 23 to the nut body 5B and tightening the bolt. At this time, the recess 25
A nut member 26 is fitted in the nut member 26, and a screw shaft 27 is engaged with the nut member 26. After mounting the support frame 10 and the position adjusting device 20 in this way, the roller shaft 30 inserted into the taper roller 31 inserts the end portion on the small diameter side into the roller support hole 16 and the other end portion into the locking groove 22. Then, the taper roller 31 is arranged.

Next, adjustment is performed to make the transport surface 31a of the taper roller 31 horizontal. That is, with the bolt 24 slightly loosened, the screw shaft 27 is rotated via the head 27a. Then, since the lower end portion 27b is in contact with the receiving surface 3B, the nut member 26 moves, and the main body 21 integrated with the nut member 26 moves up and down. As a result, the other end of the roller shaft 30 is moved up and down, and the transport surface 31a can be adjusted horizontally. After making the desired adjustment, bolt 24
Is tightened.

When carrying out a transfer operation, first the drive device 52
51 is driven. The chain 51 is supported and guided by the guide body 8 on the working path side, meshes with the lower part of each sprocket 44, and is supported and guided by the guide body 36 and the curve guide body 55 on the return path side.

FIGS. 1 to 3 and 10 show a solenoid valve 71 for connecting the air supply hose 73 to the air supply / exhaust hose 70 in all the groups A to G.
And the support shaft 41 is swung upward against the pressing force of the compression spring 50 due to the expansion of the air cylinder device 46, and all the transmission rollers 45 correspond to the corresponding taper roller 31 or straight roller.
It is pressed against 35 from below. At this time, the chain 51 is constantly driven by the drive device 52, and therefore the chain 51 is
All the sprockets 44 engaged with the sprocket 44 are rotating around the support shaft 41. Further, the transmission roller 45 is the taper roller 31.
By being in contact with the lower part of the outer periphery of the straight roller 35, the group of these rollers 31, 35 can be forcibly rotated, so that the bucket 75 can be conveyed on the paths 105, 101, 103, 107 having the entire length as the driving area.

For example, as shown in groups E and F in FIG. 11, when the solenoid valve 71 is switched to open the supply / discharge hose 70, the air cylinder device 46 is inactive and the pressing force of the compression spring 50 is reduced. The support shaft 41 is swung downwards by means of the taper roller 31 and the straight roller 35 to the transmission roller 45 as shown by the phantom line M in FIG.
Are separated from each other so that the rollers 35 and 45 are not driven. At this time, as the support shaft 41 swings downward, the sprocket 44 slides in the axial direction 63 of the support shaft 41.
Therefore, the downward swing of the support shaft 41 (swing including the vertical swing) is reasonably performed while maintaining the engagement of the sprocket 44 with the chain 51. For example, as shown in FIG. 11, when the bucket 75 is in the storage state up to the group E, the buckets 75 transported by the groups A to D in the driving state are indicated by a virtual line (a) during the transport. Is detected by the presence detector 74. When this detection signal and the detection signal from the group E are input, the electromagnetic valve 71 of the group D is automatically switched, and the transmission roller 45 is separated as described above, whereby the bucket 75 is moved to the virtual line ( It can be stopped without colliding with the bucket 75 in front as shown in (b).

Note that, for example, when the bucket 75 of the group E is carried out, the detection signal from the presence detector 74 of the group E disappears, so the solenoid valve 71 of the group D is automatically switched to the drive side, and the bucket 75 is removed. Will be conveyed to the group E side.

As described above, when the transmission roller 45 is separated so as to stop the bucket 75 that has been conveyed, that is, immediately after shifting from the driving form to the non-driving form, the stop positions become uneven due to the rollers 31 and 35 that try to rotate by inertia. However, this can be prevented by incorporating a brake roller or a stopper device, for example.

Effect of the Invention According to the present invention having the above-described structure, the movement imparting device causes the support shaft to swing upward and the transmission roller to abut against the taper roller, so that the movement force of the driving body is transmitted from the passive wheel to the transmission roller. Can be transmitted to the taper roller, whereby the taper roller can be forcibly rotated and the object to be conveyed can be conveyed on a curved path. Then, by swinging the support shaft downward by the movement imparting device and separating the transmission roller from the taper roller, it is possible to prevent the moving force of the driving body from being transmitted to the taper roller, so that the taper roller is not forcedly rotated. The transported object can be stopped on the curved path. Therefore, it is possible to stop the transported object on the curved path without causing damage to the transported object or generating noise by simple control of operating the movement imparting device in the forward and reverse directions while continuously operating the driving body. Further, depending on the length of the curved path and the length of the transported object, it is possible to stop the plurality of transported objects on the curved path in an orderly manner without collision. Also, since the passive wheel slides in the axial direction of the support shaft as the support shaft swings up and down, this vertical swing of the support shaft is not possible while always maintaining the passive wheel body in conjunction with the driving body. Can be done without.

[Brief description of drawings]

The drawing shows one embodiment of the present invention. Fig. 1 is a vertical sectional rear view of a curved conveyor section, Fig. 2 is a vertical sectional side view of the same, Fig. 3 is a vertical sectional rear view of a straight conveyor section, and Fig. 4 is a whole. 5 is a schematic plan view of the same, FIG. 5 is a schematic side view of the same, FIG. 6 is a longitudinal rear view of the position adjusting device, FIG. 7 is an inside side view of the same, FIG. Plan views, FIG. 10 and FIG. 11 are schematic plan views showing the operating state. 1 ... Body frame, 1A, 1B ... Side frame, 2A, 2B ... Guide part, 10 ... Support frame, 11 ... Board part, 16 ... Roller support hole, 20 ... Position adjustment device, 21 ... … Main body (support frame), 22…
… Locking groove, 26 …… Nut member, 27 …… Screw shaft, 30 …… Roller shaft, 31 …… Taper roller, 31a …… Conveying surface, 32 ……
Roller shaft center, 35 …… Straight roller, 40 …… Transmission unit, 41 …… Spindle, 44 …… Sprocket (passive wheel), 45
...... Transmission roller, 46 …… Air cylinder device (movement imparting device), 51 …… Chain (driving body), 52 …… Driving device, 60,6
2 …… Gap, 71 …… Solenoid valve, 74 …… In-use detector, 100…
… Roller conveyor device, 102 …… Straight conveyor, 104 ……
Curve conveyor, AG ... Group.

Claims (1)

[Scope of utility model registration request] 1. A plurality of taper rollers are rotatably arranged on the curved main body frame side. These taper rollers have a small diameter on the curved center side and a horizontal conveying surface, and their roller axes are inclined. A transmission unit is installed below one end of each taper roller that is interlocked with the drive unit and can be connected to and separated from the taper roller. The transmission unit can be vertically swung toward the main body frame along the roller axis. A support shaft mounted on the support shaft, a movement imparting device for swinging the support shaft up and down, a passive wheel body mounted on the support shaft so as to be rotatable and slidable in the axial direction, and to be always interlocked with the driving body, A roller conveyor for a curved path, characterized by comprising a transmission roller which is integrated with the passive wheel body and which can be brought into contact with and separated from the taper roller.