JPS6330737Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention relates to an intermediate drive device attached to a long conveyor, particularly a long vertical chain conveyor, and a long link conveyor.

(b) Conventional technology In long conveyors (total length 100m to 300m), whether it is a conveyor with a carrier side and a return side or a flat endless conveyor, there is a It was necessary to provide a drive device that synchronized an appropriate number of rotations to provide driving force to the conveyor and to reinforce the conveying force.

Conventionally, two squeezing wheels 22 and 2 have been used as devices for applying driving force to this intermediate flat place.
one driving wheel 23 and two crossing rollers 24
was known to use. (Conventional Example 1, FIG. 6) Next, a device was devised in which a wheel 23 directly applies driving force from below the conveyor at a flat portion of the conveyor. (Conventional Example 2, Fig. 7) In addition, in Utility Model Application No. 57-116611, the present inventor attached a drive wheel that engages the conveyor from below the conveyor to a synchronous drive shaft, and attached the conveyor to the top of the drive wheel. A presser wheel is rotatably attached to engage the conveyor from above, and a speed-increasing shaft is provided at a position forward of the drive wheel in the direction of conveyor movement, and the large-diameter coupling device attached to the synchronous drive shaft and the speed-increasing shaft are attached. A long conveyor characterized in that a tension roller for pressing the conveyor is attached to the speed increasing shaft, and a press roller for pinching the conveyor is rotatably attached to the tension roller. An intermediate drive device was proposed.
(Conventional example 3) (c) Problems that this invention attempts to solve However, with an intermediate drive device like the above-mentioned conventional example 1, a gap is created between the two squeezing wheels on the carrier surface. It is necessary to attach an auxiliary roller or the like, and even if the auxiliary roller or the like is attached, the carrier surface becomes discontinuous, resulting in the disadvantage that the products being transported are easily damaged. Furthermore, the two drive wheels are always located below the conveyor, which is inconvenient in terms of layout. Conventional Example 2 was devised to eliminate this drawback, but in this device, when using a long conveyor, especially a vertical conveyor that can be bent vertically and horizontally, the distance between the bars is expandable and retractable, so that average transfer is not possible. It was easy for the fibers to expand at some points and contract at other points without being affected. Therefore, when the conveyor is compressed and loosened, it floats higher than the intermediate drive wheel, resulting in a disadvantage that substantially no driving force is applied to the conveyor.

Conventional Example 3 is a device that eliminates these drawbacks.
However, even with this device, if the pitch difference between the left and right chain links of the conveyor belt becomes significant due to manufacturing errors, wear, etc., a difference in progress will occur between the left and right sides of the belt. In such a state, two chain bars may sometimes get caught in the sprocket at the same time on the side with the most loosening, resulting in a disadvantage that conveyor operation is impaired.

(d) Means to solve the problem This invention is an intermediate drive device attached to a long conveyor, in which a drive sprocket that engages the chain link part of the conveyor from below the conveyor is attached to a synchronous drive shaft, and the drive sprocket is attached to a synchronous drive shaft. The present invention is characterized in that a presser is rotatably attached to the upper part of the conveyor and engages with the conveyor from above, and a conveyor tensioning device is provided at a position rearward from the drive sprocket in the direction of conveyor movement, which acts as a resistance to the driven conveyor. The object is to provide an intermediate drive device in a long conveyor.

(e) Effect The intermediate drive device 2 rotates the synchronous drive shaft 9 using the transmission force from the main drive device. Then, the drive sprocket 10 attached to this synchronous drive shaft 9
The sprocket 11 rotates and engages the chain link 3 of the conveyor 1 to apply running force to the conveyor 1 and press the chain link 3 of the conveyor 1.
Since the chain link 3 of the conveyor 1 is pressed from above, the chain link 3 of the conveyor 1 does not rise above the drive sprocket 10. Since the conveyor tensioning device 7 is provided at a position behind the driving sprocket 10 of the conveyor 1 in the traveling direction of the conveyor 1, the tensioning device acts as a resistance to the driven conveyor, reducing the speed in front of the driving sprocket 10 of the conveyor 1, and increasing the tension. A force is applied to ensure that the chain link 3 of the conveyor 1 and the bar of the conveyor 1 are engaged with the drive sprocket 10.

(F) Embodiment Embodiment 1 of this invention will be described based on the drawings shown in FIGS. 1 to 3. 1 is a long vertical chain conveyor (so-called omni conveyor), and 2 is an intermediate drive device. Long birch chain conveyor 1
A device that can be fitted with a chain link 3 or a sprocket is attached on both sides along the entire length. 4 is a rail on which the long vertical chain conveyor 1 is placed, and 5 is a side rail for carrying objects. The intermediate drive device 2 includes a drive section 6 and a tensioning device 7, and the tensioning device 7 is located behind the drive section 6 in the conveyor traveling direction. The drive section 6 is composed of a synchronizer 8, a synchronous drive shaft 9, a drive sprocket 10, a presser sprocket 11, a sub-roller 12, and a small diameter sprocket 13. The synchronizer 8 communicates with the main drive device (not shown) of the long vertical chain conveyor 1, and synchronizes the rotation speed of the synchronous drive shaft 9 with the rotation speed of the main drive device. The synchronous drive shaft 9 is rotatably installed on a fixed frame 14 below the vertienne conveyor 1 in a direction perpendicular to the traveling direction, and is connected to the synchronizer 8. The synchronous drive shaft 9 is provided with a drive sprocket 10 at a position where it meshes with the chain links 3 on both sides of the verchain conveyor 1, and a small diameter sprocket 13 is provided at the end. Presser foot sprocket 11
The sub-roller 12 is constructed coaxially and is located above the drive sprocket 10 via the verchain conveyor 1. The sub-roller 12, which is rotatably attached to the fixed frame 14, has an outer peripheral surface made of hard rubber, urethane rubber, etc. The drive sprocket 1 is made of steel.
0 from above so that the chain link 3 is pinched between the chain link 3 and the chain link 3. The presser sprocket 11 is provided slightly closer to the center of the vertical chain conveyor 1 than the position of the drive sprocket 10, and
are provided so that they engage from above. 15 is a fixed shaft, and 16 is a bearing. The tension device 7 is composed of a reduction shaft 17, a tension roller 18, a press roller 19, and a large diameter sprocket 20. The deceleration shaft 17 is provided below the vertienne conveyor 1 in a direction parallel to the synchronous drive shaft 9, and is rotatably installed on the fixed frame 14. A large diameter sprocket 20 is attached to the end of the reduction shaft 17. The large diameter sprocket 20 is connected to the small diameter sprocket 13 of the synchronous drive shaft 9 by a chain 21. The size ratio between the small diameter sprocket 13 and the large diameter sprocket 20 can be changed as appropriate depending on the speed of the bar chain conveyor 1 and the width between the bars. The standard ratio is about 3:4. In this embodiment, the coupling device is constituted by a sprocket, but it may also be constituted by connecting an appropriate number of small-diameter or large-diameter gears. A tension roller 18 is attached to the deceleration shaft 17 below the chain link 3 position on both sides of the verti-chain conveyor 1. Presser roller 19
is arranged above the tension roller 18 so that the chain link 3 is sandwiched between the tension roller 18 and the tension roller 18;
It is rotatably attached to the fixed frame 14. tension roller 1
8 and the press roller 19 have outer peripheral surfaces made of hard rubber, urethane rubber, etc., and inner surfaces made of steel.

Next, another embodiment of this invention will be described based on the drawings shown in FIGS. 4 and 5. Intermediate drive device 2
consists of a drive section 6 and a tensioning device 25, and the tensioning device 25 is located at the rear of the drive section 6 in the conveyor traveling direction. The drive unit 6 has a small diameter sprocket 1
3 is the same as the embodiment shown in FIGS. 1 to 3, and the elongated vertical chain conveyor 1 is also the same.
The tension device 25 is a link shaft 2 fixed to the fixed frame 14.
6. Link 2 rotatably fitted to link shaft 26
7. Roller shaft 2 fixed to the other end of the link 27
8. It is composed of a friction roller 29 that fits on the roller shaft 28 and a tension spring 30 that is stretched between the roller shaft 28 and the fixed frame 14. The friction roller 29 is pressed against the chain link 3 with an appropriate force by a tension spring 30 via the roller shaft 28. Further, the friction roller 29 is fastened to the roller shaft 28 with an appropriate force. For this reason, friction roller 2
9 rotates according to the traveling speed of the verchain conveyor 1, but the speed is reduced by friction with the roller shaft 28, and acts to pull the verchain conveyor 1 against the drive section 6. Instead of the friction roller 29, a boat-shaped pressing device (not shown) made of a material with high wear resistance and a low coefficient of friction can also be used.

These embodiments include "Intermediate drive device for long conveyor" disclosed in Utility Model Application Publication No. 57-116611.
You can also install them together. In that case, it is possible to further enhance the effectiveness of the idea.

(g) Effects of the invention This invention has the above-mentioned configuration, operation and effect, and the structure of the intermediate drive device is simple and vertically thin and small, making assembly and maintenance work simple and easy, and making it easier to use for long conveyors. This has the effect that layout can be done more freely and efficiently. Then,
Compared to Utility Model Application No. 57-116611 ``Intermediate drive device for long conveyor'', this device has a speed increasing part located in front of the drive wheel in the direction of conveyor movement.
In contrast to the speed increase section that increases the speed and constantly stretches the conveyor, this invention provides a conveyor tension device that acts as resistance to the driven conveyor at a position behind the drive sprocket in the direction of conveyor movement. It becomes possible to extend the conveyor more easily and reliably than by increasing the speed. In addition, since the carrier surface of the conveyor is a continuous surface without rollers or gaps, it is advantageous for conveying small items or easily damaged products. Furthermore, since the elongated conveyor is always in tension and engaged with the drive sprocket, it is possible to reliably apply intermediate driving force, which has the effect of stabilizing the overall speed and expansion/contraction state of the conveyor.

[Brief explanation of the drawing]

1 to 5 show embodiments of this invention. FIG. 1 is a plan view of the intermediate drive device of the first embodiment, FIG. 2 is a sectional view taken along line A-A in FIG. FIG. 3 is a sectional view taken along the line B-B. 4 and 5 illustrate other embodiments of this invention, in which FIG. 4 is a plan view of the intermediate drive device, and FIG. 5 is a sectional view taken along the line C--C in FIG. 4. 6 and 7 are schematic side views showing a conventional example. DESCRIPTION OF SYMBOLS 1... Long vertical chain conveyor, 2... Intermediate drive device, 3... Chain link, 4... Rail, 5... Side rail, 6... Drive unit, 7...
Tension device, 8... Synchronous device, 9... Synchronous drive shaft,
10... Drive sprocket, 11... Presser sprocket, 12... Sub roller, 13... Small diameter sprocket, 14... Fixed frame, 15... Fixed shaft, 1
6...Bearing, 17...Deceleration shaft, 18...Tension roller, 19...Press roller, 20...Large diameter sprocket, 21...Chain, 25...Tension device, 26...Link shaft, 27... Link, 28...
...Roller shaft, 29...Friction roller, 30...Tension spring.

Claims (1)

[Scope of Claim for Utility Model Registration] In an intermediate drive device attached to a long conveyor, a drive sprocket that engages the chain link portion of the conveyor from below the conveyor is attached to a synchronous drive shaft, and An intermediate drive device for a long conveyor, characterized in that a retainer is rotatably attached to engage with the drive sprocket, and a conveyor tension device that acts as resistance to the driven conveyor is provided at a position rearward from the drive sprocket in the conveyor traveling direction. . The conveyor tension device comprises a reduction shaft equipped with a large-diameter sprocket, a tension roller attached to the reduction shaft, and a rotatable pressing roller that presses the conveyor against the tension roller. Intermediate drive device on long conveyor. An intermediate drive device for a long conveyor according to claim 1, wherein the conveyor tension device comprises a friction roller that presses the conveyor from above and a tension spring that pulls the friction roller downward.