JPH0643051Y2 - 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 disposed on the curved side of the frame, and these taper rollers fix the roller shaft to 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.

According to the above conventional type, the endless belt is hung on the large diameter side of the taper roller group, and the motor is interlocked with the return path side linearly located between the taper rollers at both ends. Therefore, although it is possible to manage to drive only the curved path, it is impossible to drive the conveyor that combines the curved path and the straight path using a common endless belt, because this endless belt is easily disengaged, In addition, the return path may be exposed from the body frame to the center of the curve. Further, since the taper roller is always driven, the conveyed article cannot be stored in the curved path, and when the conveyed article does not exist, it is uselessly driven.

An object of the present invention is to provide a roller conveyor for a curved path, in which a common driving body can be preferably arranged from the curved path portion to the straight path portion, and moreover, it can be easily switched to a non-driving state. It is in.

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 main body frame having a curved portion and a straight portion, and the curved portion has a taper roller having a smaller diameter on the curved center side. In addition to being provided for free rotation, a straight roller is provided for free rotation on a linear portion, and a transmission unit that can be connected and separated freely is provided below these rollers, and a common unit that works with the passive wheel of each transmission unit. Is provided near the center of the curve, and a guide body that supports and guides the action path side of the drive body is provided on the main body frame side, and the bend portion is located inside the guide body and is located inside the guide body. A curve guide body that supports and guides the return path side is provided, and a drive device that interlocks with the return path side is provided.

According to the configuration of the present invention, the driving body is arranged on the small diameter side and the curve guide body for supporting and guiding the return path side is provided, so that the working path and the return path are vertically opposed to each other in the straight portion. As a result, the driving body can be smoothly moved regardless of the length of the straight portion. Further, by connecting or separating the transmission unit with respect to the roller, the roller can be switched between the driving state and the non-driving state.

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
Is a straight conveyor (straight part) 102 which is located on the upper side to form a straight path 101, and a curved path 103 which is located on the lower side.
And a curved conveyor (curved portion) 104 that forms the.
A carry-in conveyor 106 forming a straight path 105 is arranged on the upper side of the straight conveyor 102, and a carry-in conveyor 108 forming a straight 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, it can be changed to 60 degrees, and by combining two 90-degree elements, a curve path over 180 degrees is also formed. it can.

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

Reference numeral 1 is a main body frame having a cross-sectional shape.
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.

The other side frame 1B is provided with a resin support frame 20 supported and guided by the guide portion 2B. The support frame 20 has a rectangular substrate portion 21, and the lower end of the substrate portion 21 is brought into contact with (fitted to) the receiving surface 3B, and the outer surface 21a thereof is attached to the mounting surface 4.
After attaching it to B, the mounting hole formed in the middle 22
By the structure in which the bolt 23 passed from the inside to the nut body 5B is fitted, the position of the support frame 20 can be changed (slipped) in the frame length direction and is fixed at the changed position. A projecting portion 24 is integrally provided on the inner surface side of the substrate portion 21, and the projecting portion 24 is formed with a locking groove 25 that is open upward and inward.

A taper roller 31 is rotatably provided between the support frames 10 and 20 via a roller shaft 30. That is, one end of the roller shaft 30 that is 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 25 from above so that the roller shaft 30 can be attached, and further the support frame 10 side can be attached. The taper roller 31 in which the small diameter portion is located can freely rotate around the roller shaft center 32.

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 attached to the support shaft 41, and a transmission roller 45 is externally fitted to the boss portion of the sprocket 44 to form a sprocket 44, 4
5 can be rotated integrally. 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 make contact with the support shaft 41, has a cylinder rubber receiver 47 attached to the outer end of the support shaft 41.
And the lateral plate of the L-shaped plate portion 43. Furthermore L
From the upper end of the vertical plate of the shaped plate portion 43, a receiving plate 49 is continuously provided inward 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, A compression spring 50, which is an example of a biasing device that pushes down the support shaft 41, is interposed. The above-mentioned 41 to 50 constitute one transmission unit 40, and the transmission unit 40 is arranged in a large number on the main body frame 1 as a set with the taper roller 31 via the support frames 10 and 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. The same is true of the other side frame 1B side, and a rectangular plate-shaped support frame 20 is attached to the 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, both 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 across 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.
The curved conveyor 104 is supported and guided by a curved guide body 55 having a smaller radius than the curved path 103 and located inside the guide body 8. The curve guide body 55 is arranged at the center in the curve path direction, and is fixed to the plate 56 from the main body frame 1 side via bolts and nuts 57. Further, it has a guide groove 55a whose inner surface side is open in an arc shape. The drive device 52 is arranged in a straight line portion of a return path formed between the lower driven sprocket 54 and the curve guide body 55. That is, the base plate 58 from the body frame 1 side
A pair of guide sprockets 59, 60 are mounted on the upper surface of the above, the driving device 52 including a cyclone speed reducer is mounted on the lower surface, and a driving sprocket 62 is mounted on its output shaft 61. And chain 51 guide sprocket 5
It is wound around 9,60 and the drive sprocket 62. At this time, one guide sprocket 59 is adjusted by the adjusting mechanism 63.
The tension of the chain 51 can be adjusted by attaching it via the.

As described above, the taper roller 31 and the straight roller 35 paired with the transmission unit 40 as described above are, for example, as shown in FIG. They are arranged and 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)
Before that, first, the support frame 10 having the transmission unit 40 and the other support frame 20 are attached. Ie support frame 10
Is fitted into the receiving surface 3B of the lower end of the substrate plate 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 fitted to the nut body 5A to be tightened. Can be fixed to. At this time sprocket 44
Engages with 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 support frame 20 also has a mounting hole
It can be fixed to the side frame 1B by fitting and tightening the bolt 23 passed through the nut body 5B. After mounting both support frames 10 and 20 in this manner, the small-diameter side end of the roller shaft 30 inserted into the taper roller 31 is inserted into the roller support hole 16, and the other end is inserted into the locking groove 25 from above. Drop in,
Thus, the taper roller 31 is arranged. At this time, the taper roller 31 is automatically tilted by the inclined mounting of the mounting surface 4A of the side frame 1A and the outer surface 11a of the support frame 10,
As a result, the transport surface 31a can be made horizontal.

When carrying the work, first the drive device 52
51 is driven. The chain 51 is supported and guided by the guide body 8 and meshes with the lower part of each sprocket 44 on the side of the action path, and is supported and guided by the guide body 36 and the curve guide body 55 on the side of the return path and has a predetermined shape. It is meshed with the drive sprocket 62 under tension. And chien 51
By arranging the action path side of the above on the small diameter side of the taper roller 31, and providing the curve guide body 55 for supporting and guiding the return path side at the intermediate portion of the curve conveyor 104,
In the part of the straight conveyor 102, the action path and the return path can be opposed to each other in the vertical direction, and therefore, regardless of the length of the straight conveyor 102, the chain 51 does not come off from both the driven sprockets 53 and 54. You can always move smoothly.

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 driving device 52 constantly drives the chain 51, and therefore the chain 51 is driven.
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. 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.

Advantageous Effects of Invention According to the present invention having the above-described configuration, the driving body is arranged on the small diameter side, and the curved guide body for supporting and guiding the return path side is provided inside the guide body. And can face each other vertically. As a result, regardless of the length of the straight portion, the common driving body can be suitably arranged from the straight portion to the curved portion without being disengaged from the guide ring body and exposed to the outside from the main body frame, and It can be moved smoothly. Further, by connecting or separating the transmission unit to or from the roller, the roller can be switched between a driving state and a non-driving state, whereby the transported object can be stored in a curved path and the transported object can be stored. Useless driving can be stopped when is absent.

[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. FIG. 5 is a schematic side view of the same, FIG. 6 is a vertical cross-sectional rear view of the curve guide body part, FIG. 7 is a partially cutaway plan view of the drive part, and FIG. 8 is a side view of the same. FIG. 9 is a rear view of the same, and FIGS. 10 and 11 are schematic plan views showing the operating state. 1 ... Main body frame, 1A, 1B ... Side frame, 2A, 2B ... Guide part, 4A, 4B ... Mounting surface, 8 ... Guide body, 10 ... Support frame, 11 ... Board part, 14 ... … Mounting hole, 16 …… Roller support hole, 20 …… Support frame, 21 …… Board part, 25 …… Locking groove, 30…
… Roller shaft, 31 …… Taper roller, 31a …… Conveying surface, 32
…… Roller shaft center, 35 …… Straight roller, 36 …… Guide body,
40 ... Transmission unit, 41 ... Support shaft, 44 ... Sprocket (passive wheel), 45 ... Transmission roller, 46 ... Air cylinder device (movement imparting device), 51 ... Chain (driving body), 52
...... Driving device, 55 …… Curve guide body, 62 …… Driving sprocket, 71 …… Solenoid valve, 74 …… Delivery detector, 100 ……
Roller conveyor device, 102 ... Straight conveyor (straight part), 104 ... Curve conveyor (curved part), AG ...
group.

Claims (1)

[Scope of utility model registration request] 1. A body frame having a curved portion and a straight portion is provided, a taper roller having a small diameter on the curved center side is rotatably provided on the curved portion, and a straight roller is movably arranged on the straight portion. A transmission unit that can be connected and separated is provided below these rollers, and a common drive unit that interlocks with the passive wheel of each transmission unit is provided near the center of the curve, and the action path side of this drive unit is supported. A guide body for guiding is provided on the body frame side, and a curved guide body that is positioned inside the guide body and supports and guides the return path side of the drive body is provided on the curved portion, and interlocks with the return path side. A roller conveyor for a curved path, which is provided with a drive device.