JPH0662210B2 - Pipe conveyor - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a pipe conveyor that continuously circulates an endless belt-shaped conveyor belt that circulates by rolling a large part of the belt into a pipe shape and wrapping an object to be conveyed therein. It is a thing.

[Conventional technology]

In a conventional pipe conveyor, a large number of shape-retaining frames that support and run a pipe-shaped transport belt are arranged at equal intervals.

[Problems to be solved by the invention]

When the pipe conveyor is used in a cold region, the conveyor belt is usually made of rubber or the like, and therefore tends to cure at low temperatures.

The cured transport belt requires a strong external force to roll it, and has a property of immediately returning to a flat plate shape when the external force is removed in a short time.

However, if the rolled state is maintained for a while, it is difficult to return to the flat plate shape even if external force is removed thereafter.

Therefore, as described above, when using the conventional pipe conveyor in which the shape-retaining frame is arranged at equal intervals in a cold region,
At the beginning and end of the forward and backward paths of the conveyor belt, a large reaction force for maintaining the conveyor belt in a pipe shape acts on each shape retention frame, which may lead to deterioration of the durability of the shape retention frame and In the middle of the shape retaining frame, there is a possibility that the pipe-shaped rounded conveyor belt may expand its diameter or open its mouth, resulting in a large traveling resistance of the conveyor belt.

Further, in portions other than the start and end portions of the forward and return paths of the conveyor belt, the conveyor belt is cured while being rolled into a pipe shape, and almost no external force is required to maintain the rolled state. In addition, it is uneconomical that the pitch of the shape-retaining frame for these portions is the same as the pitch of the above-mentioned starting end portion of the conveyor belt.

[Means for solving problems]

The present invention is intended to solve the above-mentioned problems by making the interval between the shape-retaining frames supporting the starting ends of the forward path and the returning path of the conveyor belt narrower than the interval between the shape-retaining frames supporting the intermediate portion. is there.

[Action]

The pipe conveyor of the present invention has a narrow interval between the shape retaining frames that support the forward and backward paths of the conveyor belt, so that the reaction force for maintaining the conveyor belt passing through that portion in a pipe shape is dispersed, The reaction force acting on one shape retention frame is small.

In addition, since the pitch of the shape-retaining frame at the starting end portion is small, the diameter of the conveyor belt and the opening of the conveying belt do not open in the middle of the adjacent shape-retaining frames.

Therefore, the running resistance is significantly smaller than that of the conventional pipe conveyor.

〔Example〕

1 and 2 show the rear and front portions of the pipe conveyor of the present invention, respectively, showing an endless belt-shaped conveyor belt (1).
Is the flat roller at the front and rear ends.
It is wound around (2) and the rear roller (3) and circulates in the direction of the arrow by a drive device (not shown).

In the vicinity of both rollers (2) and (3), the first round frame (4) and the second round frame (5) of the first round frame (4) are arranged in this order from the side closer to both rollers (2) and (3). A shape frame (6) and a second shape retention frame (7) are arranged.

As shown in FIG. 3, in the upper part of the first rounding frame (4), a horizontal rounding roller (8) and a pair of left and right rounding rollers (8) inclined outward and upward from both ends thereof are provided. A horizontal rounding roller (8) and a pair of left and right rounding rollers (8) facing upward from both ends of the second rounding frame (5) are pivotally provided.

The lower portions of the rounding frames (4) and (5) are symmetrical with respect to the upper portion, and thus the illustration thereof is omitted.

As shown in FIG. 4, a pair of upper and lower circular window holes (10) are cut in the mounting plate (9) stretched over the first rectangular shape retention frame (6), so that the mounting plate ( There are multiple shape retention rollers (11) in the window hole (9).
It is arranged concentrically with (10) and in an annular shape having a smaller diameter than the window (10).

As shown in FIG. 5, the second shape retaining frame (7) is the first shape retaining frame (6).
The mounting plate 12 is provided with a window hole 10 and a pair of shape-retaining rollers 11.

The first shape retaining frame (6) is between the front and rear second rounding frames (5),
The second shape retaining frames (7) are arranged at equal intervals and are located in the middle of each first shape retaining frame (6) at the rear of the conveyor.
The window holes (10) of the second shape-retaining frame (7) are coaxial with the window holes (10) above the first shape-retaining frame (6), and at the front of the conveyor, each first Second shape retention frame (7) in the middle of shape retention frame (6)
The window hole (10) is arranged so as to be coaxial with the window hole (10) below the first shape retaining frame (6).

As shown in FIG. 3, the rear roller is expanded into a flat plate shape.
The outward belt (1a), which is the outward path of the conveyor belt (1) running around (3) from below, is rolled into a gutter shape by the rounding roller (8) while passing through the first rounding frame (4).

At this time, the object to be conveyed (14) is dropped onto the forward path belt (1a) from the hopper (13) provided above the rear roller (3), and then passes through the second rounding frame (5) and then the first guard. The upper window (1) of the frame (6)
While approaching the (0), the forward belt (1a), the rounding roller (8)
By the shape-maintaining roller (11), the material is rolled into a pipe shape, wraps the transported object (14), and travels in the shape-maintaining frames (6) and (7).

The outward belt (1a) that has escaped from the shape retaining frame (6) at the upper end is unfolded while passing over the upper portions of the second and first rounding frames (5) and (4) above, and the transported object (14) The load receiving hopper surrounding the front roller (2)
Add to (15).

The return path belt (1b), which is the return path of the conveyor belt (1) running around the front roller (2), is rounded in the same manner as described above, and the window hole (10) below the shape retention frames (6) (7) is closed. It passes and circulates back to the rear roller (3).

When the pipe conveyor as described above is used in a cold region, the conveyor belt (1) unfolded in a flat plate shape on the front and rear rollers (2) and (3) has the first and second rounding frames (4) ( By the rounding roller (8) of 5) and the shape-maintaining roller (11) of the first shape-maintaining frame (6) at the end, the conveyor belt (1) that has just been rolled into a pipe is
When returning from the shape-maintaining roller (11) in an attempt to return to a flat plate shape, the diameter increases, and when it passes through the next shape-maintaining roller (11), it tends to be forcibly reduced in diameter. ,
Outgoing belt (1a) and returning belt of the pipe conveyor of the present invention
At the starting end of (1b), the second shape retention frame (7) is placed between the first shape retention frame (6).
Since the shape-maintaining rollers (11) are provided with a dense pitch, the amount of expansion is small, and therefore the running resistance at the starting end is small, and the pipe is not passed while passing through the starting end. It hardens in the state of being rolled into a shape, the tendency to gradually expand the diameter decreases, and the conveyor belt (1) itself maintains the pipe state, and the first shape retention frame ( 6)
Passing resistance is small.

The above is the case of the pipe conveyor in which the outer surface of the one end of the conveyor belt (1) and the inner surface of the other end are overlapped and rolled into a pipe shape. However, as shown in FIG. A pipe conveyor in which the inner surfaces of both ends are overlapped with each other and rolled into a pipe, or a pipe conveyor in which both ends of the conveyor belt are not overlapped but the conveyor belt is simply rolled to the extent of contact or proximity. Also, the present invention can be effectively used.

Further, the second shape retaining frame (7) in the above-mentioned embodiment is omitted,
The pitch of the first shape-retaining frame (6) in the front part and the rear part of the conveyor may be smaller than the pitch of the intermediate part.

〔The invention's effect〕

As described above, in the pipe conveyor of the present invention, the pipe-shaped conveyor belt is most easily expanded in diameter, and the forward and backward paths of the conveyor belt are supported by a large number of shape-retaining frames with a small mutual spacing. Since the amount of diameter expansion in the same place is small and therefore the running resistance is small, the required power may be a small output, and at the same time, since the entire conveyor including the conveyor belt is not overpowered, the service life is improved and the conveyor belt is hardened. Especially effective when used in cold weather.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view schematically showing a rear part of a pipe conveyor of the present invention, FIG. 2 is a side view schematically showing a front part of the pipe conveyor, and FIG. FIG. 4 is a plan view showing the vicinity of the start end of the outward path, FIG. 4 is an enlarged sectional view taken along the line AA in FIG. 1, FIG. 5 is an enlarged sectional view taken along the line BB in FIG. 1, and FIG. FIG. 5 is a vertical sectional view of a conveyor belt of another pipe conveyor to which the present invention can be applied. (1) Conveyor belt, (1a) Forward belt (1b) Return belt, (2) Front roller (3) Rear roller, (4) First round frame (5) Second round frame, (8) Round roller ( 9) Mounting plate, (10) Window hole (11) Shape retaining roller, (12) Mounting plate (13) Hopper, (14) Transported object (15) Load receiving hopper

Claims (1)

[Claims] 1. An endless belt-shaped conveyor belt is wound around both front and rear rollers, a large part between the rollers is rolled into a pipe shape to wrap an object to be conveyed, and a plurality of shape-maintaining frames are supported to circulate the objects. In a pipe conveyor that continuously conveys an object to be conveyed, the interval between the shape-retaining frames that support the starting ends of the forward and return paths of the conveyor belt is narrower than the interval between the shape-retaining frames that support the intermediate portion. .