JPS63262320A - Pipe conveyor - Google Patents

Abstract

PURPOSE:To uniformize the stress distribution of an expanded part by situating the end face of a roller, starting contact with a conveyor belt having a pipe conveyor expanded, in the more upper part than an extension of a central axis of the part rounded in a pipe form. CONSTITUTION:An end face 2a of a front roller 2 is situated in the more upper part than a central axis of the part rounded into a pipe form, of a conveyor belt 1, if possible, situated on an extension of an overlap of each end 1b at both sides of a pipelike conveyor belt. With this configuration, a rectilinear distance between each part of the conveyor belt 1 in a form-keeping frame 16 serving as an expansion starting point and the end face 2a comes shorter in a side of the both side-end 1b than a central part 1a. With this constitution, tractive force of the roller is made most strongly receivable at the central part where tensile strength is large enough, while expansion at the side end can be smaller. Consequently, the stress distribution of an expanded part is uniformized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pipe conveyor, and more particularly to a pipe conveyor that has been improved to correct uneven stress distribution in a deployed portion of an endless conveyor belt.

[Conventional technology]

No. 4m schematically shows a conventional pipe conveyor, in which the endless belt-shaped conveyor belt (1) has flat plate-shaped parts at both front and rear ends of the conveyor belt (1), and the front roller (2) on the right side of the figure and the left side. It circulates in the direction of the arrow by a front roller (2) that is wrapped around one rear roller (3) and rotated by a drive device (not shown).

There are rollers (2) and (3) near both rollers (2) and (3).
In order from the one closest to , the first rounding frame (4) and the second rounding frame (5
), and a large number of shape-retaining frames (6) are arranged between the two cylinders 2 and the rounding frame (5).

As shown in FIG. 6, three rounding rollers (7) are arranged in an inverted Fuji shape above the first rounding frame (4).

In addition, three rounding rollers (7) arranged in a U-shape are pivotally mounted on the upper part of the second frame (5), and the lower part of the one-car rounding frame (4) (5) is vertically symmetrical with the upper part. There is.

As shown in Fig. 5, each shape-retaining frame (6) has circular window holes (8) at the top and bottom through which the reciprocating conveyor belt (1), which is rolled up into a pipe shape, passes, as described below. A plurality of shape-retaining rollers (9) are arranged in an annular manner around each window hole (8).

As schematically shown in FIG. 4, the conveyor belt (1) is developed into a flat plate and runs around the rear roller (3) from below.
2nd rounding frame (4) (5)@The transported object (i
t).

Then, it passes through the window hole (8) at the top of each shape-retaining frame (6),
When rotating the front roller (2) from above, unfold it again,
After loading the transported object (11) into the receiving hopper (12),
It is rolled into a pipe shape again, passes through the window hole (8) at the bottom of each shape-retaining frame (6), returns to the rear roller (3), and circulates.

The above is a brief description of the structure and operation of the pipe conveyor, but as shown in FIG. la
) and both ends (1b) are stretched evenly by the traction force of the front roller (2).
The end face (2a) of the front roller (2) that starts contact with the
It was positioned on an extension of the central axis (L) of the pipe-shaped portion of the conveyor belt (1).

The relationship between the rear roller (3) and the conveyor belt (1) is as follows:
It is the same as the case of the front roller (2), and illustration thereof is omitted.

[Problem that the invention seeks to solve]

In the pipe conveyor described above, the both ends (tb) of the conveyor belt (1) that are rolled up near the unfolded part are not continuous with each other and are simply overlapped.
Stresses at both end portions (lb) are generated independently of each other, and the stress distribution is discontinuous.

Therefore, even a slight twist of the conveyor belt (1) causes a difference in the stress at both ends (1b) of the conveyor belt (1), resulting in differences in the amount of elongation of each part, an inclination of the trough-like unfolding part, or a flat plate-like unfolding. There is a risk that the portion may be biased to the side at the point where it contacts the roller (2).

[Means for solving problems]

The present invention solves the above problems by locating the end surface of the roller that starts contact with the unfolded conveyor belt above the extension of the central axis of the pipe-shaped rounded portion of the conveyor belt. It was planned.

[For production]

In the present invention, the conveyor belt (1
) and the end face (2a) of the front roller (2), the center part (la) is longer than both ends (lb), so the center part (la) receives the strongest traction force. .

The central portion (la) has a large tensile strength and is difficult to stretch.

Therefore, the elongation of the bent portion as a whole decreases, and the side end portion (1b) with the short straight line distance has less elongation.
Differences in length between both end portions (1b) are less likely to occur, and the flat conveyor belt (1) is less likely to shift to one side on the front roller (2).

〔Example〕

FIG. 1 shows an example of a belt development section of a pipe conveyor to which the present invention is applied. All the members are the same as those shown in FIG. 6, and the same members are designated with the same symbols and names. Only the features of the present invention will be described.

As shown in the figure, the present invention provides a front roller (2) with an end face (
2a) above the central axis (L) of the pipe-shaped rounded portion of the conveyor belt (1), preferably an extension of the overlapping portion of both ends (1b) of the pipe-shaped conveyor belt (1). By positioning it on the line, the straight distance between each part of the conveyor belt (1) and the end surface (2a) at the development start point (shape retaining frame (6) in Figure 1) can be It is designed to be shorter than the central part (la).

Although the front roller (2) may be fixed as in the above embodiment, for example, as shown in FIG.
) is fitted into a support fitting (15) provided on the side surface of the column (14) so as to be able to rise and fall, and a screw punch (16) is connected upwardly to the upper end of the bearing (13). of.

Screw it into the female screw plate (17) installed horizontally at the upper end of the column (14).

The height may be adjusted as appropriate by operating a handle (18) attached to the upper end of the screw pestle (16).

Note that it is desirable that the device of the present invention described above is also provided on the rear roller (3).

Furthermore, the above is a case of a pipe conveyor in which the outer surface of the negative end and the inner surface of the other end of the conveyor belt (1) are overlapped and rolled into a pipe shape, but as shown in FIG.
), the inner surfaces of both sides of the pipe are overlapped and rolled into a pipe shape, or the inner surfaces of both sides of
The present invention can also be effectively applied to pipe conveyors that are simply brought into contact or in close proximity.

〔Effect of the invention〕

By having the above-mentioned configuration, the present invention has the above-mentioned [effect], in which the linear distance between each part of the conveyor belt and the end surface of the roller at the starting point of the conveyor belt is adjusted to The two sides are made shorter than the center part, so that the traction force by the rollers is received most strongly at the center part, where the tensile strength is large, and the elongation at both ends is made small, thereby reducing the stress generated at both ends to the stress generated at the center part. Accordingly, the absolute amount of stress difference generated at both end portions can be made significantly smaller than the absolute amount of stress generated at the center portion.

This makes it possible to reduce the difference in elongation between both ends of the conveyor belt as much as possible, and also prevents the trough-like developed portion of the III conveyance belt from being inclined or the flat plate-like developed portion from being biased to the side with respect to the rollers. can be prevented.

Note that, as in the above embodiment, the end face of the roller.

By positioning the pipe-shaped conveyor belt on the extension line of the overlapping portions of both ends thereof, the elongation of both ends of the conveyor belt can be set to O in principle.

[Brief explanation of drawings]

FIG. 1 is a side view showing a developing section of a pipe conveyor to which the present invention is applied; FIG. 2 is a side view schematically showing an example of a roller lifting device of the present invention; FIG. 3 is a side view schematically showing an example of a roller lifting device of the present invention; A vertical cross-sectional view showing another example of a conveyor belt, FIG.
P Figure V is an enlarged plan view of the vicinity of the starting end of the outgoing belt in Figure V, and Figure 7 is a diagram corresponding to Figure 1 of the conventional pipe conveyor. (1) Conveyor belt (1a) Center part (1b) Side groove part (2) Front roller (3) Rear roller (
4) First rounding frame (5) Second rounding frame (6) Shape retaining frame (7) Rounding roller (8) Window hole (9) Shape retaining roller (lO) hopper (11) Transported object (12) Receiving hopper (13) Bearing
(14) Support column (15) Support metal fittings (16) Screw punch (17) Female thread plate (18) Handle (L)
Center axis Figure 1 Figure 2 Figure 6 Figure 7

Claims (1)

[Claims] Most of the endless belt-shaped conveyor belt is rolled into a pipe shape, and the flat plate-shaped parts at both the front and back ends are looped around the front and rear rollers and circulated, wrapping around the conveyed object at the starting end of the outgoing belt. In a pipe conveyor that continuously conveys pipes, the end surface of the roller that starts contact with the unfolded conveyor belt is located above the extension line of the central axis of the pipe-shaped rounded part of the conveyor belt. pipe conveyor.