JPH045452Y2 - - 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. Further, detection rollers are disposed between the rollers at predetermined intervals, and when the detection rollers are pressed down by the conveyed object, a detection signal is given to the pressure 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. When the detection roller in a certain zone in the conveyance direction detects the presence of the conveyed object, the detection signal is sent to the pressure control device, and the pressure control device controls the pressure source to change the pressure applied to the diaphragm. , thus spacing the wheels from the rollers and deenergizing that zone of the conveyor.

Problems to be Solved by the Invention According to the above conventional type, the diaphragm is fixed to a diaphragm mounting portion, and this diaphragm mounting portion is mounted to a support bracket with bolts and nuts. This rubber diaphragm is easily damaged, and in the worst case scenario, it will break. For this reason,
When replacing a diaphragm with a new one, you must remove the bolts and nuts before removing the diaphragm mounting part. After fixing the new diaphragm to the diaphragm mounting part, the bolt holes on the diaphragm mounting part must be aligned with the bolt holes on the support bracket, and the diaphragm must be tightened and fixed with bolts and nuts. As described above, it is very time-consuming to attach and detach the diaphragm attachment portion, and therefore maintenance and inspection of the diaphragm or replacement with a new one cannot be carried out quickly.

An object of the present invention is to provide a roller conveyor in which an actuating device for vertically moving a support shaft can be easily and accurately attached and detached.

Means for Solving the Problems In order to achieve the above object, the roller conveyor of the present invention is provided with a support body on the main body frame side, and a transmission roller and a passive wheel body are attached to this support body so as to be able to freely rotate together. In addition to providing a support shaft that can move up and down,
A mounting plate is provided that is detachable by being inserted along the axial direction of the support shaft, an actuator for vertically moving the support shaft is provided on the mounting plate, and the support body is provided with an actuating device that moves the support shaft up and down.
A conveyance roller located above the transmission roller and along the support shaft is rotatably provided, the actuation device has a flexible body that can be expanded and contracted by fluid pressure, and when the mounting plate is inserted, The support shaft is provided with a receiving portion that the flexible body can freely abut from below.

According to the configuration of the present invention, while the transmission roller is forcibly rotated via the passive wheel, the actuating device is actuated to inflate the flexible body upward, thereby moving the support shaft upward. The transmission roller is brought into contact with the lower part of the conveyance roller. Thereby, the rotation of the transmission roller is transmitted to the conveying roller, and the conveyed object can be conveyed by the rotation of the conveying roller. Then, by pulling out the mounting plate along the axial direction of the support shaft, the actuating device can be easily removed from the support body together with the mounting plate. In addition, by inserting the mounting plate along the axial direction of the support shaft, the actuating device can be moved together with the mounting plate.
Easily attached to the support at the correct location. This allows the flexible body to accurately reach the position where it abuts the receiving portion.

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 support frames 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, 40B with open upper and inner surfaces are formed in the upper portions of both supports 9A, 9B, and guides 41A, 41B, which are located on the outer surface side, are inclined outward toward the top. 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 part 44A with open upper and left and right sides.
44B, and subsequently, tapping grooves 45A, 45B are provided in the lower part, and these claw bodies 43A, 43B are configured to swing back and forth against their own elasticity. Further, concave step portions 46A, 46B are formed on the upper surfaces of the supports 9A, 9B, extending both forward and outward of the groove portions 44A, 44B.
A cover plate 4 that can freely close the upper surfaces of the recesses 40A and 40B by fitting into the stepped portions 46A and 46B from above.
7A and 47B have a through hole 4 in the central part in the front and back direction that can freely face the tapping grooves 45A and 45B.
8A and 48B, and tapered pushing pieces 49A and 49B that can be freely inserted into the grooves 44A and 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 surfaces thereof are inclined, and push-opening pieces 50A and 50B that can be inserted freely inside the claw parts 43a and 43b are vertically provided. Both supports 9
A conveying roller 28 made of resin is freely rotatably provided between A 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 be freely rotatable relative to each other, and these bearing bodies 5
1A 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. An L-shaped mounting plate 23 made of resin is inserted between the free ends of the cover plate portion 13, and the spindle 1 is inserted into the vertical recess 24 formed in the vertical plate of the mounting plate 23.
The outer ends of the support shafts 8 are fitted to restrict the vertical swing range of the support shafts 18. A 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 the boss portion of the sprocket 20, so that both 20 and 21 can rotate together. 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 conveyance roller 28 . An air cylinder device 55, which is an example of an actuating device for making contact and separation, is arranged on the horizontal plate of the mounting plate 23. 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. The action chamber 5 formed in
By supplying and discharging air, which is a fluid, to and from the rubber body 9, the rubber body 58 can expand and contract in the vertical direction. The rubber body 58 can freely come into contact with a cylinder rubber receiver 60 attached to the outer end of the support shaft 18 from below, and from the cylinder rubber receiver 60, a cylinder rubber member 58 having a size that completely covers the upper part of the rubber body 58 and Umbrella-shaped cover body 6
1 are connected in series. A support frame 15 is disposed between the two or more base frames 1C between the side frames 1A and 1B, and this support frame 15 is fixed to the base frame 1C via bolts and nuts 16. The mounting plate 23 is supported via 17. A chain 30, which is a common driving body interlocked with each sprocket 20, is stretched between a driving sprocket 31 and a driven sprocket 32 via a guide sprocket 33, etc., and operatively connects the driving sprocket 31 to a motor 34. are doing. This chain 30 is supported and guided by both guide rails 7 and 8 from below. A conveyance path 37 is formed by the group of conveyance rollers 28 described above. 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
1 is externally fitted with ventilation holes 25 extending along the support shaft 18 at a plurality of locations in the circumferential direction, and vanes 26 are provided on the surface facing the sprocket 20.

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

Figures 1, 2, and 5 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 is generated by the blades 26 that rotate integrally with the sprocket 20 and the like, and this wind flows into the cover plate portion 13 through the ventilation holes 25. By this,
The sprocket 20, the cover plate portion 13, the rubber body 58, etc. can be cooled. Particularly when parts are made of synthetic resin, cooling with wind is effective because this synthetic resin tends to be weak against heat, and since frictional heat is likely to be generated in such parts, cooling is effective. is necessary. Further, during the conveyance operation, foreign matter such as wood chips falls from the conveyed object 38 or the pallet 39, and this foreign matter falls onto the conveyance rollers 28 and between the conveyance 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 lids 47A, 47B are fixed by screwing the screws B into the tapping grooves 45A, 45B. As mentioned above, the push pieces 49A,
By pushing in 49B, the claw bodies 43A, 43B
outward deformation is prevented, and the engagement by the claws 43a, 43b is strongly maintained.

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. 7, the set pitch P is lengthened,
The number of transmission unit units including the conveyance roller 28, transmission roller 21, etc. can be reduced. This is done by removing the conveyance roller 28, etc. as described above, loosening the bolts 10A and 10B, and guiding the supports 9A and 9B by the guide parts 2A and 2B.
After moving the bolt 1 in the direction of the conveyance path 37, the bolt 1 is
All you have to do is tighten 0A and 10B to fix it.
At that time, extra conveyance rollers 28, support body 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, the transmission roller 21 is moved downward by reverse operation of the air cylinder device 55,
By separating the transmission roller 21 from the conveyance roller 28, the transmission roller 21 can be separated from the conveyance roller 28.
The transmission to the sixth
As shown in the non-driving area B in the figure, the conveying roller 28
By stopping the rotation of the group, the objects 38 to be transported can be stored on the transport path 37. At this time, the drive section A detects the conveyed object 38 using a sensing lever, a phototube device, etc., sequentially forcibly rotates the conveying roller 28 on the front side of conveyance of the conveyed object 38, and By sequentially controlling the rotation of the conveyance rollers 28 that have passed through, the conveyance rollers 28 can be sequentially displaced 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,
When a subsequent transported object 38 approaches this transported object 38, the driven zone A is automatically canceled to become a non-driven zone B, and continuous storage can be performed without collision.

As shown in the above embodiment, when the support frame 15 that supports the free end side of the mounting plate 23 is provided,
A portion of this load on the mounting plate 23 side can be received, and the mounting support using the bolts 10A and the like and the shape can be suitably maintained 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. Furthermore, by removing the bolts 17 and pulling out the mounting plate 23 along the axial direction of the support shaft 18, the air cylinder device 55 together with the mounting plate 23 can be easily removed from the support body 9A. Then, by inserting the mounting plate 23 along the axial direction of the support shaft 18, the air cylinder device 55 together with the mounting plate 23 can be easily mounted at an accurate position on the support body 9A. As a result, the rubber body 5
8 accurately reaches the position where it contacts the cylinder rubber receiver 60. In this way, the air cylinder device 55 can be easily and accurately attached and detached, so maintenance and inspection of the air cylinder device 55 and damaged rubber body 58 can be quickly replaced with a new one.

In the above embodiment, the conveyance roller 28 is provided between both supports 9A and 9B, but this means that the conveyance roller 28 is provided on one of the supports 9A, and separately from the conveyance roller 28, there is a A freely rotatable free roller may be provided on the other support body 9B.

Effects of the Invention According to the present invention having the above configuration, while the transmission roller is forcibly rotated through the passive wheel, the actuating device is actuated to inflate the flexible body upward, thereby moving the support shaft upward. The transmission roller can be brought into contact with the lower part of the conveyance roller. Thereby, the rotation of the transmission roller can be transmitted to the conveyance roller, and the conveyed object can be conveyed by the rotation of the conveyance roller. Then, by pulling out the mounting plate along the axial direction of the support shaft, the actuating device can be easily removed from the support body together with the mounting plate. Further, by inserting the mounting plate along the axial direction of the support shaft, the actuating device together with the mounting plate can be easily mounted at an accurate position on the support body. This allows the flexible body to accurately reach the position where it abuts the receiving portion. In this way, since the actuating device can be easily and accurately attached and removed, maintenance and inspection of the actuating device and damaged flexible body can be quickly replaced with a new one.

[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.
FIG. 4 is an exploded perspective view of the main parts, and FIGS. 5 to 7 are schematic side views showing the operation. 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, 25 ...
...Vent hole, 26...Blade, 27...Roller shaft, 2
8...Conveyance roller, 29...Roller axis, 30
...Chain (driving body), 37...Transport route, 38
...Conveyed object, 39...Pallet, 40A, 40
B...Concavity, 43A, 43B...Claw body, 43a,
43b...Claw portion, 44A, 44B...Groove portion, 47
A, 47B... Lid plate, 49A, 49B... Push piece, 50A, 50B... Push expansion piece, 51A, 51
B... Bearing body, 53A, 53B... Locked part, 5
5... Air cylinder device (actuating device), 58...
Rubber body (flexible body), 60... cylinder rubber receiver,
61...Cover body.

Claims (1)

[Scope of utility model registration request] A support frame is provided on the main body frame side, and a support shaft on which a transmission roller and a driven wheel are integrally rotatably mounted is provided on this support body so as to be movable up and down, and the support frame is inserted along the axial direction of this support frame. A detachable mounting plate is provided, an actuating device for moving the support shaft up and down is provided on the mounting plate, and a conveyance roller located above the transmission roller and along the support shaft is mounted on the support body to rotate the conveyance roller. The actuating device has a flexible body that can be expanded and contracted by fluid pressure, and the support shaft is provided with a receiving part that allows the flexible body to come into contact from below when the mounting plate is inserted. A roller conveyor characterized by: