JPH09110125A - Torsion straightening device in pipe conveyor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simple structure torsion straightening device by which torsion can be easily straightened at any time according to the degree of the torsion when the torsion is generated in a conveying belt of a pipe conveyor. SOLUTION: Between figure holding rollers 6, 6 adjacent to each other at an interval in the advancing direction of a conveying belt 1a, straightening rollers 12a, 12b, each of which is tilted at a proper slanting angle to a reference axis orthogonal to the advancing direction of the conveying belt 1a, are arranged, and an operation means 16, by which the straightening rollers 12a, 12b are brought into pressure contact with the conveying belt 1a at any time if torsion is generated, is arranged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for straightening a twist of a pipe conveyor, which has a conveyor belt rolled into a pipe shape and is twisted with respect to a central axis in the running direction.

[0002]

2. Description of the Related Art A pipe conveyor is known in which most of an endless circulating conveyor belt is rolled into a pipe shape, and a granular material is wrapped in the conveyor belt for continuous transportation. FIGS. 6 to 8 show an example thereof. .

The endless conveyor belt (1) having flexibility is
As shown in FIG. 6, the front drive drum has an elastic tendency to roll around the longitudinal axis to become a pipe shape.
It is flatly developed at (2) and the driven drum (3) at the rear side and is wound around each drum (2) (3).

Between the two drums (2) and (3), a plurality of rectangular frame-shaped supporting frames (4) are connected to each other by a connecting rod (5) parallel to the traveling direction of the conveyor belt (1). As a result, they are arranged at substantially regular intervals in the front-rear direction. As shown in FIG. 7, each support frame (4) is divided into upper and lower two chambers (4a) and (4b), and in the upper chamber (4a), the outward belt (1a) which is the outward side of the conveyor belt (1). However, the return path belt (1b) which is the return path side of the conveyor belt (1) passes through the lower chamber (1b).

In the upper and lower chambers (4a) and (4b) of each support frame (4),
A plurality of shape-retaining rollers (6) are respectively pivoted on the same circumference at substantially regular intervals so as to form a substantially circular shape.

As shown in FIG. 8, the forward path belt (1a), which has been flatly developed and has rotated from the lower surface of the driven drum (3) to its upper surface, supports the lower surface and the side surface of the belt (1a), respectively. By being guided by the rollers (7) and (8), and due to the elastic tendency of the rollers (7) and (8), they are gradually rolled into a gutter shape.

While the outward belt (1a) does not curl sufficiently,
From the hopper (9) provided above the driven drum (3), the powdery or granular transported object (10) is dropped onto the outward belt (1a).

Then, the outward belt (1a) enters the upper chamber (4a) of the support frame (4), is guided by the shape-retaining roller (6) and is rolled into a pipe shape, and the outward belt (1a). Both ends of the are superposed on each other at the upper side, and the object to be conveyed (10) is wrapped therein.

Outgoing belt (1a) wrapping the transported object (10)
Is supported by the shape-maintaining roller (6) 2 and runs while maintaining a pipe shape. Near the front drive drum (2), the forward belt (1) that escaped from the frontmost support frame (4)
a) is unfolded while passing through the wrapping portion of the transported object (10) shown in FIG. 8 while passing through a belt unfolding device (not shown) which is substantially symmetrical in the front-rear direction, Drive drum
It is put in the cargo box (11) provided at the lower front of (2).

Return belt (1b) passing through the driving drum (2)
Is rolled into a pipe shape as described above, passes through the lower chamber (4b) of each support frame (4), and returns to the driven drum (3) for circulation.

The above-mentioned pipe conveyor sometimes has the number 1
It may be installed as long as 00m, but if the distance between the drums (2) and (3) is too long, the pipe-shaped conveyor belt (1) will rotate around its axis. Since it may be twisted, a means for straightening the twist is provided.

Various types of conventional twist correction means have been proposed.
57-137206, Japanese Utility Model Laid-Open No. 61-206509, JP-A-5-88
There are some such as those described in Japanese Patent Publication No. 22 and Japanese Patent Application No. 6-22523.

[0013]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
The twist correction means described in Japanese Patent No. 6 is based on changing the angle of the axis of the shape-retaining roller.
The twist correction means described in the publication uses a correction roller different from the shape-retaining roller, and is provided with a means for changing the angle at which the correction roller comes into contact with the conveyor belt. Since it is constantly in pressure contact with the outer circumferential surface of the rolled conveyor belt, it is not easy to adjust it while the pipe conveyor is in operation, and normally, the temporary conveyor is stopped to perform the adjustment work for straightening the twist, After that, it was inefficient in that the conveyor had to be operated again to see the effect of straightening.

Further, in the twist correction means described in Japanese Utility Model Laid-Open No. 61-206509, the adjustment work of the twist correction is performed only by changing the angle of the rotary shaft of the correction roller, which is another element of the twist correction. Since it is not possible to adjust the roller pressing pressure of the roller, it is difficult to obtain an appropriate straightening effect.

The twist straightening device described in Japanese Patent Laid-Open No. 5-8822 is a system in which the angle of a plurality of straightening rollers arranged around the circumference of the conveyor belt is adjusted together with its roller support frame. The twist correction means described in No. 6-22523 is
This is because the deviation of the step of the belt overlapping portion is detected, and when the deviation reaches a constant value, the angle of the support roller is changed. There are few, and it is not economical.

In view of the above problems of the prior art, the present invention provides:
It is an object of the present invention to provide a twist straightening device having a simple structure that can easily correct the twist depending on the degree of the twist.

[0017]

According to the present invention, the above-mentioned problem is solved as follows. (1) In a pipe conveyor in which at least a part of an endlessly traveling conveyor belt is rolled into a pipe shape by a shape-retaining roller, and an object to be conveyed is wrapped in the inside thereof to be conveyed, the pipe is rolled into a pipe shape. A device for correcting the twist of a conveyor belt, which is provided between the shape-retaining rollers adjacent to each other at intervals in the traveling direction of the conveyor belt, on the outer peripheral surface of the conveyor belt rolled into a pipe shape, in the traveling direction of the conveyor belt. A straightening roller that imparts a twist straightening force to the pipe-shaped conveyor belt by inclining it obliquely and pressing it,
An operating means that is provided so as to be movable between an operating position in pressure contact with the outer peripheral surface of the conveyor belt and an inoperative position distant from the outer peripheral surface of the conveyor belt, and that moves the correction roller between the operating position and the inoperative position. To provide.

(2) In the above item (1), the correction roller is pivotally supported at one end of the roller support frame, operation means is provided at the other end of the roller support frame, and the intermediate part of the roller support frame is appropriately provided. Is pivoted to the fixed body of.

(3) In the above item (2), the operating means is
A handle for manual operation provided integrally with the roller support frame.

(4) In the above item (2), the operating means is
The power cylinder is provided between the roller support frame and an appropriate fixed body.

(5) In any one of the above items (2) to (4), the center of the conveyor belt is such that the intermediate portion of the roller support frame is pivotally supported by the rotating frame, and the rotating frame is rolled into a pipe shape. By pivotally supporting an appropriate fixed body with an axis directed in the direction, the inclination angle of the correction roller with respect to the traveling direction of the conveyor belt can be varied.

(6) In any one of the above items (1) to (5), a plurality of straightening rollers are provided in the traveling direction of the conveyor belt, the inclination angles of which are positive and negative with respect to a reference axis perpendicular to the traveling direction. To do.

(7) In any one of the above items (1) to (6), a plurality of straightening rollers having the same inclination angle with respect to a reference axis perpendicular to the traveling direction of the conveyor belt are arranged in the traveling direction of the conveyor belt. .

(8) In any one of the above items (1) to (7), a lock means is provided to prevent the correction roller from moving while the correction roller is being pressed against the conveyor belt.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention is shown in FIGS. In this embodiment (the same applies to the second and subsequent embodiments), the same or similar members as those in the above-mentioned conventional example are designated by the same reference numerals, and a duplicate description thereof will be omitted. Further, in these drawings, a part of the support frame (4) and a part of the connecting rod (5) are omitted for convenience of illustration.

A plurality of support frames (4) for supporting the shape-retaining rollers (6) are arranged in the direction orthogonal to the forward direction of the outward belt (1a) at intervals. Straightening rollers (12a) (12b) according to the present invention are provided between adjacent support frames (4).
Are arranged on the bottom side of the conveyor belt (1a).

The straightening rollers 12a, 12b may be of any suitable type such as a flat roller type, a V type two roller type, a trough type three roller type or the like. These straightening rollers (12a) and (12b) are both at one end of the roller support frame (13).
It is pivotally attached to the (left end of FIG. 1) with a rotating shaft (14),
An intermediate portion of the roller support frame (13) is pivotally supported by an appropriate fixed body (not shown) with a pivot shaft (15).
A handle (16) for manual operation is integrally provided at the other end of (13) .By manually operating the handle (16), the straightening rollers (12a) and (12b) are piped. It can be pressed into contact with the outer peripheral surface of the outward path belt (1a) which is rolled into a shape.

As shown in FIG. 2, the straightening roller (12a) is
The rotation shaft (14) and the pivot shaft (15) are arranged so as to be inclined by a required angle θ in plan view with respect to a reference shaft (17) orthogonal to the traveling direction of the outward belt (1a). In addition, straightening roller (12
b) is arranged in the direction opposite to the straightening roller (2a) with respect to the reference axis (17), with the axial direction inclined by an angle θ. This angle θ is preferably 30 degrees or less.

With such a structure, the forward belt (1
When the twist of (a) is visually recognized, select one of the straightening rollers (12a) and (12b) according to the direction of the twist, and handle it (15).
By manually pushing down the straightening roller from the inoperative position, which is distant downward from the bottom of the outward belt (1a),
It is moved to an operating position where it presses against its bottom to exert a corrective action. Specifically, when a phenomenon occurs in which the outward belt (1a) twists clockwise in the belt traveling direction (clockwise direction), the straightening roller (12a) is pushed onto the outward belt (1a). Then, a force in the counterclockwise direction (left-hand screw direction) is applied to the outward belt (1a) to correct the twist. In the case of reverse twist, the straightening roller (12a) is pressed. At this time, the pressing force of the straightening roller against the belt is
It can be set arbitrarily by the force applied to 5).

When the twist is eliminated in this way, the handle (15) is released and the straightening rollers (12a) and (12b) are moved to the forward belt (1).
Keep away from a). However, the twist is not temporary,
If it occurs constantly, straighten the rollers (12a) (12b) with the straightening rollers (12a) (12b) pressed against the outward belt (1a).
A lock device (not shown) is provided to prevent movement of the
By operating this, the correction force may be constantly applied to the conveyor belt (1).

In the second embodiment shown in FIG. 3, a plurality of straightening rollers (12a) inclined in the same direction (in the case shown) are provided between the shape-retaining rollers (6) adjacent to each other at intervals in the belt traveling direction. (2 pieces), and between the shape-retaining rollers (6) adjacent to this,
A plurality of straightening rollers (12b) (two in the case shown) inclined in the opposite direction to the straightening roller (12a) are provided.

In the third embodiment shown in FIG. 4, an appropriate fixed body such as a connecting rod (5) and a straightening roller (12) of a roller support frame (13) are provided.
A publicly known power cylinder (operating means) (21) operated by compressed air is provided between the end portion where the roller support frame (13) is not provided and the roller support frame (13) can be rotated. . In this case, the pressing pressure can also be arbitrarily set by the power cylinder (21).

FIG. 5 shows a fourth embodiment of the present invention. In this embodiment, the central portion of the upward U-shaped rotating frame (31) is attached to an appropriate fixed body (not shown) immediately below the central axis of the conveyor belt which is rolled into a pipe shape. It is pivotally attached by a vertical shaft (32) facing the centripetal direction of the belt, and at the upper ends of both side pieces (31a) of the rotating frame (31), the same roller support frame (13) as that of the first embodiment is provided. ) Of the straightening roller with respect to the reference axis (17)
The inclination angle (θ) of (12) can be freely changed in both positive and negative directions.

The present invention can be modified in many other ways. For example, as shown in FIG. 2, two straightening rollers (12a) (12b) having different inclination angles (θ) with respect to the reference axis (17).
Are provided so as to face both ends of a seesaw-type support plate (not shown) in which an intermediate portion is pivotally attached to an appropriate fixed body (not shown), and the support plate is provided by an appropriate operation means similar to the handle (16). When one of the straightening rollers (12a) or (12b) is brought into pressure contact with the conveyor belt, the other end of the support plate descends,
The other straightening roller (12b) or (12a) may be separated from the conveyor belt.

[0035]

According to the present invention, when a twist occurs in the conveyor belt, the straightening roller can be pressed against the conveyor belt at any time while the pipe conveyor is operating, and the twist can be easily corrected. Moreover, since the effect of the straightening roller can be immediately confirmed, the pressing strength can be adjusted while observing the effect. Also,
There is also an advantage that the structure is simple and a large-scale device as in the past is not required.

According to a second aspect of the present invention, the straightening roller is pivotally supported at one end of the roller support frame, operation means is provided at the other end of the roller support frame, and the intermediate portion of the roller support frame is appropriately provided. If it is pivotally supported by the fixed body, the operating direction of the operating means and the direction in which the straightening roller is pressed against the conveyor belt are reversed and the operability is improved.

According to the third aspect of the present invention, when the operating means is a handle for manual operation provided integrally with the roller support frame, the twist of the conveyor belt can be easily corrected only by manual operation. Besides, there is an advantage that the pressing pressure of the straightening roller can be easily adjusted.

If the operating means is a power cylinder provided between the roller support frame and an appropriate fixed body as in the fourth aspect of the invention, the correction is performed and the pressing pressure of the correction roller is set. It can be done mechanically.

According to the fifth aspect of the present invention, the roller support frame is pivotally supported at its intermediate portion, and the rotary frame is appropriately provided with an axis directed toward the centripetal direction of the pipe-shaped conveyor belt. If the inclination angle of the straightening roller with respect to the traveling direction of the conveyor belt is made variable by pivotally supporting it on the fixed body of No. 3, even with a single device, twists with different positive and negative (or clockwise and counterclockwise) directions can be generated. In addition to the correction, the inclination angle of the correction roller can be changed according to the magnitude and strength of the twist to adjust the correction force applied to the conveyor belt at any time.

According to the sixth aspect of the present invention, when a plurality of straightening rollers having positive and negative inclination angles with respect to a reference axis orthogonal to the traveling direction of the conveying belt are arranged in the traveling direction of the conveyor belt, the straightening rollers are adapted to the twisting direction. A straightening roller can be selected and actuated to easily correct a twist in any direction.

When a plurality of straightening rollers having the same inclination angle with respect to the reference axis perpendicular to the traveling direction are arranged in the traveling direction of the conveyor belt,
Depending on the number of straightening rollers activated, the straightening force can be doubled.

According to the eighth aspect of the present invention, when the lock means for preventing the movement of the straightening roller in the state where the straightening roller is pressed against the transport belt is provided, the straightening action is continuously exerted and the steady state of the transport belt is achieved. Twisting can be eliminated.

[Brief description of the drawings]

FIG. 1 is a side view showing a part of a pipe conveyor equipped with a first embodiment of the present invention, omitting parts of a supporting rod and a connecting rod thereof.

FIG. 2 is a plan view of the same.

FIG. 3 is a schematic plan view showing a second embodiment of the present invention.

FIG. 4 is a schematic side view showing a third embodiment of the present invention.

FIG. 5 is a perspective view of a main part of a fourth embodiment of the present invention.

FIG. 6 is a schematic side view of a conventional pipe conveyor.

FIG. 7 is an enlarged sectional view taken along the line VII-VII of FIG.

8 is an enlarged cross-sectional view taken along the line VIII-VIII in FIG.

[Explanation of symbols]

 (1) Conveyor belt (1a) Forward belt (1b) Return belt (2) Drive drum (3) Driven drum (4) Support frame (4a) Upper chamber (4b) Lower chamber (5) Link rod (6) Shape retention Roller (7) (8) Support roller (9) Hopper (10) Transported object (11) Packing box (12) (12a) (12b) Straightening roller (13) Roller support frame (14) Rotating shaft (15) Pivot shaft (16) Handle (operating means) (17) Reference axis (21) Power cylinder (31) Rotating frame (31a) Side piece (32) Axis (33) Axis

Claims (8)

[Claims] 1. A pipe conveyor in which at least a part of an endlessly traveling conveyor belt is rolled into a pipe shape by a shape-retaining roller, and an object to be conveyed is wrapped in the inside thereof to be conveyed. An apparatus for correcting the twist of the conveyor belt, wherein the conveyor belt advances on the outer peripheral surface of the conveyor belt rolled into a pipe shape between the shape-retaining rollers adjacent to each other at intervals in the traveling direction of the conveyor belt. A straightening roller that imparts a twist correction force to the pipe-shaped conveyor belt by inclining obliquely to the direction and press-contacting the outer peripheral surface of the conveyor belt, and the outer periphery of the conveyor belt. The pie is provided so as to be movable to an inoperative position distant from the surface, and an operation means for moving the correction roller to the operative position and the inoperative position is provided. Orthotic device twist in the conveyor. 2. A straightening roller is pivotally supported at one end of a roller support frame, an operating means is provided at the other end of the roller support frame, and an intermediate portion of the roller support frame is pivotally supported at an appropriate fixed body. The twist straightening device for a pipe conveyor according to claim 1, wherein: 3. The twist correcting device for a pipe conveyor according to claim 2, wherein the operating means is a handle for manual operation provided integrally with the roller support frame. 4. The twist correction device for a pipe conveyor according to claim 2, wherein the operating means is a power cylinder provided between the roller support frame and an appropriate fixed body. 5. An intermediate portion of the roller support frame is pivotally supported on the rotary frame, and the rotary frame is pivotally supported on an appropriate fixed body by a shaft directed in the centripetal direction of a pipe-shaped rolled conveyor belt. The twist straightening device for a pipe conveyor according to any one of claims 2 to 4, wherein the inclination angle of the straightening roller with respect to the traveling direction of the conveyor belt is variable. 6. A plurality of straightening rollers are arranged in the traveling direction of the conveyor belt, the inclination angles of which are positive and negative with respect to a reference axis perpendicular to the traveling direction.
A twist straightening device for a pipe conveyor according to any one of 1. 7. The straightening roller according to claim 1, wherein a plurality of straightening rollers having the same inclination angle with respect to a reference axis orthogonal to the traveling direction of the conveying belt are arranged in the traveling direction of the conveying belt. Straightening device for pipe conveyors in Japan. 8. The twist straightening device for a pipe conveyor according to claim 1, further comprising lock means for preventing movement of the straightening roller in a state where the straightening roller is pressed against the conveyor belt. .