JPH052488Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a roller conveyor that supports and conveys bucket carts containing loads and the loads themselves.

BACKGROUND ART Conventionally, as this type of roller conveyor, a structure as seen in, for example, Japanese Unexamined Patent Publication No. 160807/1983 has been provided. In this conventional structure, a large number of rollers are provided on the main body frame (parallel rails) so as to freely rotate to form a conveyance path, and a case is provided on the main body frame side via a support bracket or the like. This case is provided with a pin along the axis of the roller, and a wheel and a sprocket are provided on this pin so as to be able to freely rotate together with a sprocket that can simultaneously contact the lower outer periphery of a pair of adjacent rollers. The drive chain supported and guided by the sprocket is engaged with the sprocket. Diaphragms are provided between the case and the pins to move the pins up and down, and each diaphragm is connected to a pressure source of the control device.

According to this conventional method, a drive chain rotates a wheel via a sprocket, and the rotation of this wheel is transmitted to a pair of rollers that are in contact with each other, and the conveyed object is moved along the conveyance path by the rotation of the roller group. They are being transported.

Problems to be Solved by the Invention In the conventional configuration described above, by manufacturing the sprocket and wheels from synthetic resin, the shape can be easily obtained and the weight can be reduced. However, because the wheels themselves generate frictional heat and reach considerable temperatures (up to 70 degrees Celsius), and synthetic resin tends to be sensitive to heat, it is not easy to use synthetic resin.

An object of the present invention is to provide a roller conveyor that can automatically cool the passive wheels and transmission rollers during operation.

Means to Solve the Problems In order to achieve the above object, the roller conveyor of the present invention has a pair of supports on the left and right side of the main frame, a support shaft on at least one of the supports, a passive wheel made of synthetic resin is rotatably attached to the support shaft, a transmission roller is attached to an annular boss integral with the passive wheel, an air hole is formed in the annular boss in the direction along the support shaft, a blade is provided at the opening of the air hole, and a transport roller is rotatably provided between the two supports which can come into contact with the transmission roller from above.

According to the configuration of the present invention, the transmission roller is forced into a circuit via the passive wheel body, and the rotation of the transmission roller is transmitted to the conveyance roller, so that the conveyance of the conveyed object is carried out by the rotation of the conveyance roller. I can do it. Wind is generated by the blades that rotate integrally with the passive wheels, and this wind flows through the ventilation holes to cool the surrounding area.

Embodiment An embodiment of the present invention will be described below based on the drawings.

Reference numeral 1 denotes a main body frame having a cross-sectional shape, and is composed of a pair of left and right side frames 1A, 1B, and a base frame 1C connecting the lower portions of these side frames 1A, 1B.
L-shaped guide portions 2A, 2B are formed on the opposing inner surfaces of the side frames 1A, 1B, and dovetail groove portions 4A, 4 are formed on the upper portions to allow the nut bodies 3A, 3B to slide.
B is formed. Further, on the inner surface of the lower part of one side frame 1A, a pair of upper and lower guide rails 7 and 8 are disposed in the longitudinal direction of the frame via mounting portions 5 and 6, respectively. Resin-made supports 9A, 9B are provided on the inner surfaces of the side frames 1A, 1B so that their lower ends are fitted so that their positions can be changed (slidably) in the frame length direction, and these supports 9A, 9B
are mounting holes 11A, 11 formed in the middle part.
The bolts 10A, 10B passed through B are screwed into the nut bodies 3A, 3B, thereby fixing them at the changed position. One support body 9A has a case shape, and includes a base plate part 12 having a lower end to be fitted into the guide part 2A and a mounting hole 11A, and a base plate part 12.
It is formed by a pair of front and rear cover plate parts 13 that are connected inward from the inner surface of the lower half of 2, and a connecting plate part 14 that is provided between the lower ends of these cover plate parts 13. Recesses 40A and 40B with open upper and inner surfaces are formed in the upper parts of both supports 9A and 9B, and guides 41A and 41B that are located on the outer surface side are inclined outwardly toward the upper part. Surface 42A,
42B is formed. Also, the recesses 40A, 40
The front and rear surfaces of B have inward claw portions 43a, 43 at the upper end.
It is formed by pawl bodies 43A and 43B having b. At the upper part of the back side of the claw bodies 43A, 43B, there is a groove 44A with open top and left and right sides.
44B, and subsequently, tapping grooves 45A and 45B are provided in the lower part, and these claw bodies 43A and 43B are configured to swing back and forth against their own elasticity. Furthermore, supports 9A and 9B
Concave step portions 46A and 46B are formed on the upper surface of the groove portions 44A and 44B in the front and rear outward directions. The lid plates 47A, 47B, which can be fitted from above into the stepped portions 46A, 46B to close the upper surfaces of the recesses 40A, 40B, have a through hole 48A, which can be freely opposed to the tapping grooves 45A, 45B, in the central part in the front and back direction. , 48B, and tapered pushing pieces 49A, 49B that can be freely inserted into the grooves 44A, 44B from above are vertically provided on the inner end side of the lower surface, and on the outer end side of the lower surface, The outer surface thereof is inclined, and push-opening pieces 50A and 50B that can be inserted freely inside the claw portions 43a and 43b are vertically provided. A conveying roller 28 made of resin is freely rotatably provided between the supports 9A and 9B via a roller shaft 27. That is, bearing bodies 51A and 51B are attached to both ends of the roller shaft 27 inserted so as to freely rotate relative to each other, and these bearing bodies 51A and 51B can be fitted into the recesses 40A and 40B from above. Here, the bearing bodies 51A and 51B have a rectangular block shape, and a through hole 52 in the center of which the roller shaft 27 is inserted.
A, 52B are formed, and a locked portion 53 is formed at the upper corner portion to which the claw portions 43a, 43b can be freely engaged and detached.
A and 53B are formed in a concave shape. Note that a plurality of sets of bearing bodies 51A and 51B are prepared in which the vertical positions of through holes 52A and 52B are displaced. By fitting the aforementioned bearing bodies 51A, 51B into the recesses 40A, 40B, the roller shaft 27 can be attached, and the conveying roller 28 can freely rotate around the roller axis 29. A support shaft 18 along the roller axis 29 is attached to one support body 9A so as to be vertically swingable. That is, the bearing hole 19 is located at the lower end of the base plate 12.
is formed, and the inner end of the support shaft 18 is connected to a bearing hole 19.
It is fitted into the wall and can swing up and down. And between the free ends of the cover plate part 13 is an L-shaped plate part 23 made of resin.
The support shaft 18 is attached to the vertical recess 24 formed in the vertical plate of the L-shaped plate portion 23.
The outer ends of the support shaft 18 are fitted to restrict the vertical swing range of the support shaft 18. A synthetic resin sprocket 20, which is an example of a passive wheel, is rotatably attached to the support shaft 18, and a transmission roller 21 is fitted onto an annular boss portion 22 formed integrally with the sprocket 20.
Both 20 and 21 are integrally rotatable. This transmission roller 21 is made of urethane rubber, and its outer periphery is able to come into contact with and separate from the lower outer periphery of the conveying roller 28 . An air cylinder device 55, which is an example of an actuating device for making contact and separation, is connected to the L-shaped plate portion 2.
It is arranged on the horizontal board of 3. This air cylinder device 55 consists of a main body 56 fixed to a horizontal plate, and a rubber body (an example of a flexible body) 58 fixed to the upper part of this main body 56 via a presser member 57. By supplying and discharging air, which is a fluid, to and from an action chamber 59 formed in the rubber body 58, the rubber body 58 can expand and contract in the vertical direction. The rubber body 58 is
Cylinder rubber receiver 60 attached to the outer end of the support shaft 18
An umbrella-shaped cover body 61 is integrally connected to the cylinder rubber receiver 60 and has a size that completely covers the upper part of the rubber body 58 . A support frame 15 is disposed between both side frames 1A and 1B and between a plurality of base frames 1C, and this support frame 15 is used to hold bolts and nuts 1.
It is fixed to the base frame 1C via 6, and
The L-shaped plate portion 23 is supported via bolts and nuts 17. The chain 30, which is a common driving body interlocked with each sprocket 20, is connected to the driving sprocket 3.
1 and a driven sprocket 32 via a guide sprocket 33, etc., and the driving sprocket 31 is operatively connected to a motor 34. This chain 30 is supported and guided by both guide rails 7 and 8 from below. The aforementioned conveyance roller 2
A transport path 37 is formed by eight groups. Reference numeral 38 denotes an object to be transported, which is supported and transported via a wooden pallet 39.

In the sprocket 20, the transmission roller 2
The annular boss portion 22 into which the sprocket 1 is fitted has ventilation holes 25 extending along the support shaft 18 at multiple locations in the circumferential direction, and blades 2 are provided on the surface facing the sprocket 20
6 is provided. The ventilation holes 25 have an arcuate shape in the circumferential direction, and are further formed at six locations in the circumferential direction. The blades 26 are arranged at three locations in the circumferential direction between the ends of the ventilation hole 25. Each blade 26 is composed of a pair of blade plates 26a, 26b in the circumferential direction, and these blade plates 26a, 26b come together at the side surface when viewed from the circumferential surface side, and have outer ends when viewed from the side surface side. It is inclined so that it converges at

Next, the conveyance work in the above embodiment will be explained.

Figures 1, 2, and 8 show the air cylinder device 5.
By moving all the transmission rollers 21 upward together with the support shaft 18 by the push-up force of 5, and pressing them against the corresponding conveyance rollers 28, it is possible to set the entire length of the conveyance path 37 to the driving area A. It shows. The pushing up force in the air cylinder device 55 is obtained by supplying compressed air to the action chamber 59 and inflating the rubber body 58 upward.
This pushing up force is transmitted to the support shaft 18 via the cylinder rubber bearing 60, causing the support shaft 18 to swing upward about the support fulcrum of the bearing hole 19. The motor 34
Therefore, the chain 30 is constantly driven, and therefore all the sprockets 20 engaged with the chain 30 are rotating around the support shaft 18. Further, the transmission roller 21 is in contact with the lower outer periphery of the conveying roller 28, so that the group of conveying rollers 28 is forcibly rotated, and the conveyed object 38 can be conveyed on the conveying path 37.

During such conveyance work, wind E is generated by one blade plate 26a of the blades 26 such as the sprocket 20 that rotate integrally D, and this wind E passes through the ventilation hole 25 and flows into the cover plate part 13. There will be an influx into As a result, the annular boss portion 22, the transmission roller 21, the sprocket 20, the cover plate portion 1
3 and surrounding parts such as the rubber body 58 can be cooled directly or indirectly. Particularly when parts are made of synthetic resin, this synthetic resin tends to become weaker against heat.
Cooling by wind is effective, and since frictional heat is likely to be generated in such areas, cooling is necessary. Furthermore, during the transport work, for example, the transported object 3
Foreign objects such as wood chips fall from the conveyor belt 8 and the pallet 39, and these foreign objects fall onto the conveying rollers 28 and between the conveying rollers 28. The foreign matter that has fallen onto the conveyance rollers 28 slips on the conveyance rollers 28 and moves between the conveyance rollers 28 , and therefore some of them enter the cover plate section 13 . I will do it. A part of the foreign matter that has entered the cover plate portion 13 is received and guided by the cover body 61, so that it does not fall onto the rubber body 58, and the rubber body 58 is protected from foreign matter.

In such a conveyance state, the through hole 52
Bearing bodies 51A and 51B, which are formed by inserting the roller shaft 27 into A and 52B, are fitted into the recesses 40A and 40B of the supports 9A and 9B from right above. During this fitting, the outer surfaces of the bearing bodies 51A, 51B act on the claws 43a, 43b, so that the claws 43A, 43
B is expanded against elasticity, and then the claw parts 43a, 43b are moved to the locked parts 53A, 53 by the elastic restoring force.
B, and the bearing bodies 51A, 51B are prevented from coming off. The upper part of the bearing bodies 51A, 51B is closed by the cover plates 47A, 47B, but at this time, the pushing pieces 49A, 49B are inserted into the grooves 44A, 44B.
At the same time, the cover plates 47A and 47B are fitted into the stepped portions 46A and 46B. And tap screws 54A, 54 passed through through holes 48A, 48B.
The lid plates 47A, 47B are fixed by screwing the screws B into the tapping grooves 45A, 45B. As mentioned above, the push pieces 49 are inserted into the grooves 44A and 44B.
By pushing A, 49B, the claw bodies 43A, 4
3B is prevented from deforming outward, and the claw portions 43a, 43
The engagement by b is maintained strongly.

When changing the conveyance mode described above to a conveyance roller 28 of a different diameter in order to change the roller pitch P or change the conveyance speed, the conveyance roller 28 currently in use is first removed. That is, first, tap screws 54A, 54B are unscrewed, and cover plates 47A, 47B are removed. and cover plate 47
A, 47B are rotated 180 degrees so that the front and back are reversed, and the push-expanding pieces 50A, 50B are attached to the claw parts 43a, 4.
3b. In this state, the cover plates 47A, 47
When B is lowered, its expansion pieces 50A and 50B
acts on the inner surfaces of the claws 43A, 43B, opening these claws 43A, 43B outward against the elasticity, and releasing the claws 43 from the locked parts 53A, 53B.
Remove a and 43b. Next, conveyance roller 2
8, the bearing bodies 51A and 51B that are fitted onto the roller shaft 27 are moved to the recesses 40A and 40B.
The bearing bodies 51A and 51B are taken out upward from the
The upper cover plates 47A and 47B are also taken out upward. After that, the bearing bodies 51A and 51B which are fitted onto the roller shaft 27 of the new conveyance roller 28 are inserted into the recess 40.
A, 40B from right above, and cover plate 47
All you have to do is set A and 47B.

When handling a long object 38 as shown in FIG. 10, the set pitch P can be increased to reduce the number of transmission units including the transport roller 28, transmission roller 21, etc. . This is done by removing the conveyance roller 28, etc. as described above, loosening the bolts 10A and 10B, and guiding both supports 9 by the guide parts 2A and 2B.
After moving A and 9B in the direction of the conveyance path 37, bolts 10A and 10B may be tightened and fixed to the nut bodies 3A and 3B that have been moved integrally. At this time, the excess conveyance rollers 28, supports 9A, 9B, etc. are removed.

In the above description, the entire length of the conveyance path 37 is defined as the driving area A, but this can be controlled to be switched into the driving area A and the non-driving area B. That is, by bringing the transmission roller 21 into pressure contact with the conveyance roller 28 by the extension movement of the air cylinder device 55, the driving area A is moved.
can be formed. Then, by moving the transmission roller 21 downward by reverse operation of the air cylinder device 55 and separating the transmission roller 21 from the conveyance roller 28, the power transmission from the transmission roller 21 to the conveyance roller 28 is cut off. As a result, the rotation of the group of transport rollers 28 is stopped as shown in the non-drive area B in FIG. 6, and the object to be transported 38 can be stored on the transport path 37. At this time, the drive area A detects the transported object 38 using a sensing lever, a phototube device, etc.
By sequentially forcibly rotating the conveyance rollers 28 on the front side of conveyance, and sequentially stopping the rotation of the conveyance rollers 28 on which the conveyed object 38 has passed, it is possible to sequentially displace the conveyance rollers 28 in the conveyance direction. In addition, at a specific location, a non-driving area B can be formed by a control signal etc. to store the transported object 38, and when a subsequent transported object 38 approaches this transported object 38, an automatic control is performed. As a result, the driving area A is dissolved to become a non-driving area B, and continuous storage can be performed without collision.

As shown in the above embodiment, when the support frame 15 supporting the free end side of the L-shaped plate part 23 is provided, part of the load on this L-shaped plate part 23 side can be received, and the bolt 10A The mounting support and shape can be maintained suitably for many years.
Further, the support frame 15 can be used for mounting a phototube device or a solenoid valve, and can also be used as the main material of a duct.

In the above embodiment, the unit consisting of the sprocket 20, the transmission roller 21, etc. is disposed on one side frame 1A, but it may be disposed on the other side frame 1B, or it may be disposed on both side frames 1A and 1B. Alternatively, the transport rollers 28 may be driven from both ends. When disposed on the other side frame 1B, the direction of rotation is relatively reversed, so that the other blade plate 26b generates a wind e at the time of rotation d, as shown in FIG.

Note that when the above-mentioned unit is disposed only on one side, the other side frame 1B can be shaped without the mounting parts 5, 6, etc., as shown in FIG. 11, for example, so that the weight can be reduced.

Effects of the Invention According to the present invention having the above configuration, the transmission roller is forcibly rotated via the passive wheel, and the rotation of the transmission roller is transmitted to the conveyance roller, so that the conveyed object is conveyed by the rotation of the conveyance roller. It can be performed. Wind is generated by the blades that rotate integrally with the passive wheels, and this wind flows through the ventilation holes and directly or indirectly cools the annular boss, transmission roller, and surrounding parts. During operation, the passive wheels and transmission rollers can be automatically cooled, and they can easily be made of resin.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a partially cutaway front view, Fig. 2 is a cross-sectional view of various parts from the - direction in Fig. 1, and Fig. 3 is a view taken in the direction of the - arrow.
Figures 4 and 5 are both side views of the vicinity of the annular boss, Figure 6 is an explanatory diagram of the same action, Figure 7 is an exploded perspective view of the main parts, and Figures 8 to 10 are schematic side views showing the action. figure,
FIG. 11 is a partially cutaway front view showing another embodiment. 1...Body frame, 1A, 1B...Side frame, 9
A, 9B...Support body, 15...Support frame, 18
... Support shaft, 19 ... Bearing hole, 20 ... Sprocket (passive wheel), 21 ... Transmission roller, 22 ...
...Annular boss portion, 25...Vent hole, 26...Blade,
26a, 26b... vane plate, 27... roller shaft,
28...Conveyance roller, 29...Roller axis center, 3
0... Chain (driving body), 37... Conveyance path, 3
8...Object to be transported, 39...Pallet, 40A, 4
0B...Concavity, 43A, 43B...Claw body, 43
a, 43b...Claw portion, 44A, 44B...Groove portion,
47A, 47B... Lid plate, 49A, 49B... Pushing piece, 50A, 50B... Pushing expansion piece, 51A,
51B... Bearing body, 53A, 53B... Locked part, 55... Air cylinder device (actuating device), 5
8... Rubber body (flexible body), 60... Cylinder rubber receiver, 61... Cover body.

Claims (1)

[Scope of utility model registration request] A pair of left and right supports is provided on the main body frame side, a support shaft is provided on at least one of these supports, a passive wheel made of synthetic resin is rotatably attached to this support shaft, and a A transmission roller is attached to the annular boss portion, a ventilation hole is provided in the annular boss portion in a direction along the spindle, and a blade is provided at the opening of the ventilation hole, and the transmission roller is installed between both supports. A roller conveyor characterized by rotatably provided with a conveying roller that can freely come into contact with the roller from above.