JPH0748009A - Pipe conveyer - Google Patents

Abstract

PURPOSE:To prevent the damage and turning up of the side edge of a carrying belt in a trough conversion section even in the case of the occurrence of the deviation of a load and the damage of a roller. CONSTITUTION:A guide roller 9 in a trough conversion section B is arrangedly provided so as to be away outward from an imaginary straight line to mutually connect the outer peripheries of both pulleys 2 (an outside one is omitted in a drawing). Thus, since a carrying belt 1 is once bent outward, and both its side edges try to wind on the pulley 2 in a similarly strained state or leave the pulley 2, even if the deviation of a load and the damage of a up part, the above defects are naturally corrected in the trough conversion section B, and the carrying belt 1 is prevented from deviating toward one side and turning up.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe conveyor in which a part of an endless belt-shaped conveyor belt is rolled into a pipe shape, and an object to be conveyed is wrapped in the conveyor belt.

[0002]

2. Description of the Related Art FIGS. 4 to 7 show an example of a conventional pipe conveyor.

In this conventional pipe conveyor, an endless belt-shaped conveyor belt (1) is separated from each other by a pair of front and rear pulleys.
(2) Unfold it between the (3) and flat belt and hang it around both pulleys.
(2) Any one of (3) is rotated by driving means (not shown) such as a motor so as to be circulated.

Both pulleys (2) and (3) in the conveyor belt (1)
Each intermediate portion between the forward path portion (1a) and the return path portion (1b) is fixed to the support frame (4) provided along the transport direction at a suitable interval with a large number of storages as shown in FIG. Upper chamber in form (5)
(5a) and the lower chamber (5b) are passed through a window hole (5c) formed in the center of each, and at the time of passing, a plurality of shape-retaining members arranged in a substantially annular shape at the periphery of the window hole (5c). It is rolled into a pipe by the roller (6).

As shown in FIG. 4, a portion of the conveyor belt (1) wound around one pulley (2) or (3) and developed into a flat belt until it is rolled into a pipe or into a pipe. From the rolled part to the other pulley (3) or (2)
In the trough conversion parts (A) (A ′) (B) (B ′) that are laid around and are spread into a flat belt, the conveyor belt (1) is
By a guide roller (9) such as a trough pivotally supported by a plurality of guide frames (8) fixed to a frame (7) extending in the front-rear direction from a middle portion of front and rear ends of the support frame (4) , Is gradually rolled into a pipe shape or gradually expanded into a flat belt shape.

As schematically shown in FIG. 6, the conveyor belt (1) is developed into a flat plate shape and the rear pulley (3) is rotated from below.
Envelops the transported material (11) dropped from the supply hopper (10) while passing through each guide frame (8) of the trough conversion section (A) and being gradually rolled into a pipe shape.

Then, while passing through the upper window hole (5c) of each shape-retaining frame (5) and passing through each guide frame (8) at the trough conversion part (B), it is gradually expanded into a flat belt shape. , Front pulley
When traveling around (2) from above, transport the goods (11) to the receiving hopper (1
2), then, at the trough conversion section (A ′), it is rolled again into a pipe shape, passes through the window hole (5c) at the bottom of each shape-retaining frame (5), and is further transferred to the trough conversion section (B). '), It is unfolded into a flat belt again, and then returns to the rear pulley (3) and circulates.

The above is the outline of the structure and operation of the pipe conveyor. The trough conversion section (B) of the conventional conveyor belt (1) is, as shown in FIG. 7, an expanded conveyor belt.
The central axis (CL) of the portion of the conveyor belt (1) that is rolled into a pipe shape is so that the central portion and both side edges of (1) extend evenly by the pulling force of the pulley (2) in the front portion. Pulley (2) at the front that starts contact with the extended line with the unfolded conveyor belt (1)
It is aligned with the apex (2a) of the outer circumference of the above or is located below the apex (2a) (see, for example, JP-A-63-262320).

The relationship between the rear pulley (3) and the conveyor belt (1) in the trough converting section (A) is as follows.
(B) and the front and rear have a similar relationship (not shown).
Further, the trough conversion unit (A ′) and the trough conversion unit (B ′) and the trough conversion unit (A) are vertically symmetrical (not shown).

[0010]

In the conventional pipe conveyor as described above, the conveyor belt (1) immediately after entering the trough conversion section (B) is still rolled into a pipe shape, and at that portion. Since both side edges of the conveyor belt (1) are not continuous with each other and are simply superposed,
The stresses on both edges occur independently of each other, and the stress distribution becomes non-uniform.

Therefore, even a slight twist of the conveyor belt (1) causes a difference in stress on both side edges, the expansion amount of each part is different, the gutter-shaped expansion part is inclined, and the flat-plate-shaped expansion part is expanded. There is a risk that the portion will be offset to the side at the point of contact with the pulley (2).

In order to eliminate such a fear, there is a self-aligning roller provided in the trough converting portion to prevent lateral displacement of the belt. However, the load is biased or the roller is damaged. In such a case, the belt running adjustment by the self-aligning roller does not work properly, the side edge of the conveyor belt (1) contacts the guide frame (8), etc. and is damaged or the side edge is folded back. There is a problem.

In view of the above-mentioned problems of the prior art, the present invention damages or folds the side edge portion of the conveyor belt in the trough conversion unit even when the load is deviated or the rollers are damaged. It is an object of the present invention to provide a pipe conveyor improved so as to prevent return and the like.

[0014]

In order to achieve the above object, the present invention provides a pipe-shaped intermediate portion between both pulleys of an endless belt-shaped conveyor belt which is looped around a pair of pulleys separated from each other. In a pipe conveyor that is configured to be rolled into a wrap and to be transported by wrapping it in a wrapping product, the part that is hung on one pulley of the transport belt and expanded into a flat belt is rolled into a pipe or An imaginary straight line that connects the outer circumferences of the two pulleys with a guide roller that guides the conveyor belt in the trough conversion section from the rounded portion to the flat belt by being wound around the other pulley The feature is that they are arranged so as to be more outward.

For implementation, it is preferable to add the following configuration. (A) At least one pair of presser rollers that press both side edges of the conveyor belt so as to follow the pulleys are provided in a portion of the trough conversion unit near the pulleys. (B) Each pressing roller is provided on an appropriate support so that the position of each pressing roller can be adjusted in the vertical direction. (C) Each presser roller is provided on an appropriate support so that the position can be adjusted in the left-right direction.

[0016]

The guide belt in the trough converting section is arranged so as to be separated from the imaginary straight line connecting the outer peripheries of both pulleys to each other, so that the conveyor belt is once bent outward and both side edges are Since it tries to wind around the pulley or move away from the pulley in an equally tensioned state, deviation of the load, damage to the guide roller, etc. may occur, or twisting may occur at the part rolled into a pipe shape. Even in such a case, they are naturally corrected in the trough conversion section, and the conveyance belt is prevented from being biased to one side or folded back.

[0017]

1 to 3 show an embodiment of the present invention. It should be noted that the same members as those of the above-described conventional device are denoted by the same reference numerals and detailed description thereof is omitted, and in the following description, only the characteristic configuration of the present invention different from the conventional configuration will be described.

According to this embodiment, the trough converter (B) is
Three guide frames (8) at equal intervals, that is, the trough conversion unit
When the total length of (B) is (D), it is arranged at intervals of (D / 4), and a central guide roller for guiding the bottom of the conveyor belt (1) in each guide frame (8). (9)
Is a virtual straight line connecting the outer circumferences of both pulleys (2) and (3)
It is arranged outside of (L), that is, at the trough conversion section (B) so as to be separated upward.

The distance from the straight line (L) to the apex of the center guide roller (9) in each guide frame (8) is, for example, (D / 700) for the center of the three guide frames (8). ), And those on both sides should be (D / 750).

The pipe-shaped rounded portion of the conveyor belt (1) is arranged so that the bottom thereof coincides with the straight line (L).

Further, the pulley (2) and the guide frame closest to it
At a position intermediate with (8), that is, at a position closer to the guide frame (8) closest to the top of the pulley (2) by, for example, (D / 8), both side edges of the conveyor belt (1) are placed. Pulley (2)
A pair of presser rollers (20) that press so as to follow the outer peripheral surface of the
Is provided.

As shown in FIG. 3, a shaft (21) for pivotally supporting each pressing roller (20) is fixed to a supporting plate (22) substantially horizontally, and the supporting plate (22) is supported by an appropriate supporting member. The above straight line drilled in (23)
With a pair of upper and lower bolts and nuts (26) penetrating an arc-shaped long hole (24) centered on (L) and a substantially horizontal long hole (25) formed in the support plate (22), By tightening the support roller (23), the position of the pressing roller (20) can be adjusted substantially vertically and horizontally.

As described above, by disposing the central guide roller (9) in each guide frame (8) so as to be separated from the straight line (L) above, the conveyor belt (1) is provided with a trough conversion section. In (B), it is once bent upward, and it tries to wind around the pulley (2) in a state where both side edges are equally strained, so that deviation of the load or damage to the guide roller (9) occurs. Or, even if a twist occurs in the pipe-shaped rolled part, they are naturally corrected in the trough conversion part (B), and the conveyor belt (1) is biased to one side or folded. Is prevented. Therefore, the conveyor belt
There is also no risk of the side edge of (1) contacting the guide frame (8) or the like and being damaged.

Further, as described above, at least one pair of pressers for pressing both side edges of the conveyor belt (1) so as to follow the pulley (2), in a portion of the trough converting section (B) close to the pulley (2). By providing the roller (20), it is possible to more effectively prevent the side edges of the conveyor belt (1) from being folded back.

Although the above description is for the trough conversion unit (B) only, the trough conversion unit as shown in FIG.
(A) has a structure that is symmetrical with respect to the trough conversion unit (B) and the trough conversion unit (A ') has a structure that is vertically symmetrical with the trough conversion unit (B). It is possible to obtain substantially the same effects as described above even if ') has a structure which is symmetrical with respect to the trough conversion unit (B) in the up and down direction and the front and rear direction, or a structure in which these are appropriately combined.

The above embodiment is a pipe conveyor in which the outer surface of the one side edge portion and the inner surface of the other side edge portion are overlapped with each other and rolled into a pipe shape.
A pipe conveyor in which the inner surfaces of both side edges of the conveyor belt (1) are overlapped with each other and rolled into a pipe shape, or
The present invention can be effectively applied to a pipe conveyor in which both side edges are simply brought into contact with or brought close to each other.

Furthermore, two or more pairs of pressing rollers (20) may be provided.

[0028]

According to the present invention, the following effects can be obtained. (a) By arranging the guide rollers in the trough conversion unit so as to be away from the imaginary straight line connecting the outer peripheries of both pulleys, the conveyor belt is once bent outward and both side edges are Since it tries to wind around the pulley or move away from the pulley while being equally tense,
In the unlikely event that the load shifts or the guide rollers are damaged, or if there is twisting in the part that is rolled into a pipe, they are naturally corrected in the trough conversion section, and the conveyor belt shifts to one side. It is prevented from being folded or folded. Therefore, there is no possibility that the side edge portion of the conveyor belt may come into contact with the guide frame or be damaged.

(B) Further, at least a pair of pressing rollers for pressing both side edges of the conveyor belt so as to follow the pulleys are provided in the trough converting portion in the vicinity of the pulleys.
(Invention of Claim 2), it is possible to more effectively prevent the side edges of the conveyor belt from being folded back. In this case, if the position of the pressing roller can be adjusted in the up-down direction and the left-right direction (the invention according to claims 3 and 4), it is possible to deal with the conveyor belts having different widths and thicknesses, and the versatility is increased.

[Brief description of drawings]

FIG. 1 is a side view of an essential part of an embodiment of the present invention.

FIG. 2 is a plan view of the main part of the same.

FIG. 3 is an enlarged sectional view taken along the line III-III in FIG.

FIG. 4 is a schematic side view showing an example of a conventional pipe conveyor.

5 is an enlarged cross-sectional view taken along the line VV of FIG.

FIG. 6 is a schematic plan view of a rear portion of a conventional pipe conveyor.

FIG. 7 is a schematic side view of a front portion of a conventional pipe conveyor.

[Explanation of symbols]

(1) Conveyor belt (1a) Forward part (1b) Return part (2) (3) Pulley (4) Support frame (5) Shape retention frame (5a) Upper chamber (5b) Lower chamber (5c) Window hole (6) ) Shape-maintaining roller (7) Frame (8) Guide frame (9) Guide roller (10) Supply hopper (11) Conveyed material (12) Load receiving hopper (20) Presser roller (21) Shaft (22) Support plate (23) Support (24) (25) Long hole (26) Bolt / nut (A) (A ') (B) (B') Trough conversion part (D) Trough conversion part total length (L) Straight line

Claims (4)

[Claims] 1. A pipe-shaped intermediate portion between both pulleys of an endless belt-shaped conveyor belt which is hung and circulated between a pair of pulleys separated from each other is rolled into a pipe shape so that an object to be conveyed is wrapped and conveyed. In this pipe conveyor, the flat belt is wound around one pulley of the conveyor belt and rolled from a flat belt into a pipe, or from the rolled portion to the other pulley. A guide roller that guides the conveyor belt in a trough conversion portion in a trough conversion section until it is deployed in a shape is arranged so as to be separated from an imaginary straight line that connects the outer peripheries of the two pulleys to each other. Pipe conveyor. 2. The pipe conveyor according to claim 1, wherein at least a pair of pressing rollers for pressing both side edges of the conveyor belt so as to follow the pulleys are provided in a portion of the trough conversion section which is close to the pulleys. 3. The pipe conveyor according to claim 2, wherein each pressing roller is provided on an appropriate supporting body so that the position of each pressing roller can be adjusted in the vertical direction. 4. The pipe conveyor according to claim 2, wherein each pressing roller is provided on an appropriate supporting body so that the position of each pressing roller can be adjusted in the left-right direction.