JPH0573644B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) A known pipe conveyor is a pipe conveyor that rolls most of a circulating endless belt-like conveyor belt into a pipe shape, and wraps a powder-like conveyed material therein for continuous conveyance. Since the conveyed object is wrapped around the conveyor belt, the conveyed object can be conveyed at a large upward inclination angle compared to other types of conveyors.

However, if the conveyed object is heavy and easy to flow, such as dry sand, or if the inclination angle is extremely large, the conveyed object above the outbound belt will still slide down and fill the lower part.
Conveyance becomes unsmooth, and conveyor operation is disrupted.

The present invention relates to an apparatus capable of conveying even easily flowing objects at a large upward inclination angle.

(Prior art) As a countermeasure for the above-mentioned case, for example, as disclosed in Japanese Utility Model Application No. 57-147807,
There are means for providing a large number of fins on the inner surface of the conveyor belt to prevent the flow of the conveyed objects from falling, and as disclosed in Japanese Utility Model Application Publication No. 58-83313, there are means for providing the inner surface of the conveyor belt with a large number of fins for preventing the flow of the conveyed objects from falling. Means for providing bellows is provided.

(Problems to be Solved by the Invention) All of these methods have the effect of preventing the flow of conveyed objects from falling, but the production of the conveyor belt is extremely troublesome and expensive, and during long-term use, protruding fins and There is a problem that the bellows easily breaks.

(Means for Solving the Problems) The present invention provides a pipe conveyor in which most of the circulating endless belt-shaped conveyor belt is rolled into a cylindrical shape, and an object to be conveyed is wrapped therein for continuous conveyance. The shape-retaining frame that guides the belt includes a fixed roller that faces left and right with respect to the traveling direction of the belt, and a fixed roller that is parallel to the fixed roller, can approach the fixed roller, and has an appropriate biasing means. By providing a pressure roller that is biased towards the cylindrical shape, the forward transport belt, which is rolled into a cylindrical shape, is deformed into a horizontally long flat cylindrical shape by the pressure roller and the fixed roller, and then passes between the two rollers. A plurality of belt clamping pressure means are arranged in a straight line part in the middle of an upwardly sloped part of the cylindrical conveyor belt at appropriate intervals in the traveling direction of the belt. This is an attempt to solve the above-mentioned problems.

(Function) The conveyor belt wraps around the conveyed object,
When passing through a steep slope, each time the belt passes between the pressing roller and fixed roller of each clamping means,
It is deformed into a horizontally long flat cylinder shape, eliminating the space between the conveyor belt and the object to be conveyed, and at the same time compressing the object a little, thereby reliably preventing the object from flowing down.

In this way, the objects to be conveyed are reliably prevented from flowing down at multiple locations in the middle of the steep slope where each belt clamping pressure means is provided, so that the objects to be conveyed remain at the bottom of the steep slope. You can ascend smoothly along steep slopes without having to worry about it.

(Example) Fig. 1 schematically shows a pipe conveyor to which the present invention is applied. The endless belt-shaped conveyor belt 1 has flat plate-shaped portions at both front and rear ends wrapped around the front roller 2 on the right side of FIG. 1 and the rear roller 3 on the left side of the same figure, not shown. The drive device circulates in the direction of the arrow.

Near both rollers 2 and 3, a first rounding frame 4 and a second rounding frame 5 are arranged in order from the one closest to both rollers 2 and 3.
However, the gentle slope part A between both the second rounding frames 5
A large number of first shape-retaining frames 6 and a large number of second shape-retaining frames 7 are disposed at the front steeply inclined portion B, respectively.

As shown in FIG. 3, each first shape retaining frame 6 has two upper and lower parts.
It is divided into chambers 6a and 6b, and each chamber 6a and 6b has a plurality of shape retaining rollers 8 disposed in an annular shape.

4 and 5 show a first embodiment of the present invention. As shown in FIG. 4, each second shape-retaining frame 7 is divided into two upper and lower chambers 7a and 7b, with the upper chamber 7a being At the bottom, a fixed roller 9 facing in the left-right direction is pivotally mounted with a bearing 10.

Above the fixed roller 9, a pressure roller 11 parallel to the fixed roller 9 is fixed to the left and right sides of the upper chamber 7a via a rectangular cylindrical bearing 12. rail 13
The bearing 12 is supported by a fixed roller 9 with appropriate biasing means such as a compression spring 14.
is being energized towards.

The second shape-retaining frame 7, the fixed roller 9, the pressure roller 11, and the compression spring 14 deform the outgoing belt 1a, which has been rolled into a cylindrical shape, into a horizontally long flat cylindrical shape, and the space between the rollers 9 and 11 is changed. A plurality of belt clamping means are configured to allow the belt to pass, and a plurality of such belt clamping means are arranged at appropriate intervals in the belt traveling direction in a straight line part in the middle of the upwardly sloped part of the outgoing belt 1a. It is arranged.

The lower chamber 7b is vertically symmetrical to the upper chamber 7a.

Both the first and second rounding frames 4 and 5 are divided into two upper and lower chambers (not shown), like the first shape-retaining frame 6, and the upper chamber of the first rounding frame 4 has a As shown in FIG. A rounding roller 15 forming a rounding roller 15 and a pair of left and right rounding rollers 15 facing upward from both ends are respectively pivotally installed, and the lower chambers of both rounding frames 4 and 5 are vertically symmetrical with the upper chamber.

As shown in FIG. 2, the outgoing belt 1a is developed into a flat plate and runs around the front roller 3 from below.
While passing through the first rounding frame 4, the rounding roller 1
5, it is rolled into a gutter shape.

At this time, the hopper 1 provided above the front roller 3
6, the conveyed object 17 is dropped onto the outgoing belt 1a, then passed through the second rounding frame 5, and then transferred to the first shape-retaining frame 6.
While entering the upper chamber 6a, the outbound belt 1a is rolled into a pipe shape by the rounding roller 15 and the shape-retaining roller 8, wraps around the conveyed object 17, becomes a cylindrical belt 1a', and forms a gently sloped portion A. proceed.

As shown in FIG. 4, the cylindrical belt 1
When a' enters the upper chamber 7a of the second shape-retaining frame 7, it is pressed by the pressing roller 11 when passing through the belt clamping means, and becomes a horizontally long cylindrical belt 1a'' with a steep slope. Raise part B.

Since the long cylindrical belt 1a'' has a smaller vertical cross-sectional area than the cylindrical belt 1a', the conveyed object 17 is slightly compacted and the space above the conveyed object 17, where the conveyed object 17 easily flows down, is eliminated. Therefore, even if the object 17 to be transported is something that easily flows, such as dry sand, it can be transported upward through the steep slope B without flowing down.

The long cylindrical belt 1a'' that has escaped from the second shape retaining frame 7 at the upper end is unfolded while passing through the upper second and first rounding frames 5, 4, and carries the conveyed object 17 to the front roller 2. The cargo is placed into the receiving hopper 18 surrounding the container.

The returning belt 1b that has run around the front roller 2 is rolled up in the lower chamber of the upper first and second rounding frames 4 and 5, as described above, and then rolled up in the lower chamber of the second and first shape retaining frames 7, 6 and the lower chambers of both the second and first rounding frames 5, 4, and return to the rear roller 3 for circulation.

The above is a case of a pipe conveyor in which one end of the inner surface and the other end of the outer surface of the conveyor belt 1 are overlapped and rolled.

FIGS. 6 and 7 show a second embodiment of the present invention which is effective when applied to a pipe conveyor in which both ends of the inner surface of the conveyor belt 51 are overlapped and rolled.
In the same figure, 52, 53, 54, 55, 56, 5
7 is the above 7, 9, 10, 12, 13, respectively.
These are the second shape-retaining frame, fixed roller, bearing, bearing, rail, and compression spring similar to No. 14.

Reference numeral 58 denotes a pair of coaxial left and right pressure rollers, which correspond to the pressure roller 11 and have a larger diameter and shorter size.
is formed. 60 is an object to be transported.

In the second embodiment, the overlapping portion 51a protruding upward of the rounded conveyor belt 51 is arranged in the annular groove 5.
9 with a margin, it can be deformed into a horizontally long shape as shown in the figure, and the same effect as in the previous embodiment can be achieved.

In addition, in the first embodiment, the return belt 1b
The steeply sloped part B is also pressed into a horizontally long flat cylinder shape, but in both the first and second embodiments, there is no object to be conveyed on the return belt side, so the It may be guided while being rolled into a perfect cylindrical shape as shown in FIG. 6, or while being opened into a flat band shape.

(Effects of the Invention) According to the present invention, the following effects can be achieved.

(a) By each belt clamping means, (a-1) the conveyed object within the conveyor belt is slightly compressed and prevented from falling.

(a-2) Since the space above the conveyed object within the conveyor belt is eliminated, the conveyed object does not flow downward within the conveyor belt.

(a-3) If the height of the top surface of the object to be conveyed is uneven, or if large solid objects are mixed in the object, the pressure roller will resist the urging means accordingly. By moving the conveyor belt upward, the forward movement of the conveyor belt is not obstructed.

(b) A plurality of belt clamping means having the effect as in a above are arranged at appropriate intervals in the traveling direction of the belt in a straight line part in the middle of the steeply upwardly sloped part of the cylindrical conveyor belt. As a result, objects to be transported are reliably prevented from flowing down at multiple locations along the steep slope, and thereby the objects to be transported can be moved along the steep slope without staying at the bottom of the slope. You can move up smoothly.

(c) It is possible to transport objects that tend to flow upward at a steep angle simply by locally changing the structure of the guide means on the steep slope without using a special transport belt. .

[Brief explanation of the drawing]

FIG. 1 is a front view schematically showing a pipe conveyor to which the present invention is applied, and FIG. 2 is an enlarged plan view of the vicinity of the conveyed object dropping part in FIG. 1 in the first embodiment.
FIG. 3 is an enlarged sectional view taken along line X-X in FIG. 1, and FIG. 4 is an enlarged sectional view taken along the line
5 is an enlarged sectional view taken along the Z-Z line in FIG. 4, FIG. 6 is a vertical sectional view of the rolled conveyor belt in the second embodiment, and FIG. FIG. 4 is a sectional view also corresponding to FIG. 4. A...gentle slope part, B...steep slope part, 1...transport belt, 1a...outward belt, 1a'...cylindrical belt, 1
a″...long cylindrical belt, 1b...return belt, 2...front roller, 3...rear roller, 4...first rounding frame, 5
...Second rounding frame, 6...First shape-retaining frame, 6a...Upper chamber, 6
b...Lower chamber, 7...Second shape retaining frame, 7a...Upper chamber, 7b...
lower chamber, 8...shape retaining roller, 9...fixed roller, 10...
Bearing, 11... Pressing roller, 12... Bearing, 13... Rail, 14... Compression spring, 15... Rounding roller, 16
...Hopper, 17...To be transported, 18...Receiving hopper,
51... Conveyor belt, 51a... Polymerization section, 52... Second
Shape-retaining frame, 53...Fixed roller, 54...Bearing, 55...
Bearing, 56... Rail, 57... Compression spring, 58... Pressing roller, 59... Annular groove, 60... To be transported.

Claims (1)

[Claims] 1. In a pipe conveyor in which most of the circulating endless belt-shaped conveyor belt is rolled up into a cylindrical shape and the conveyed object is wrapped in it and conveyed continuously, a shape-retaining frame that guides the cylindrical conveyor belt is provided with a shape-retaining frame that is By providing a fixed roller that faces in the left-right direction, and a pressure roller that is parallel to the fixed roller, can approach the fixed roller, and is urged toward the fixed roller by an appropriate urging means. , the belt clamping means is configured to deform the forward transport belt, which is rolled into a cylindrical shape, into a horizontally long flat cylindrical shape by a pressing roller and a fixed roller, and allows the belt to pass between the two rollers; The belt clamping means of the pipe conveyor are arranged in a straight line part in the middle of the steeply upwardly inclined section of the cylindrical conveyor belt at appropriate intervals in the direction of movement of the belt. Conveyance device.