Conveyor device

Abstract

To provide an inexpensive conveyor device capable of reducing a working force from an article to be conveyed during acceleration and deceleration.SOLUTION: A conveyor device 10 with a conveyor belt 12 that stores an article to be conveyed in a state of being folded in half in a width direction and travels along a conveyance path inclined from a horizontal state, includes a guide member 14 which is provided for reducing an inertial force working on the article S to be conveyed and is disposed within the conveyor belt 12 along a conveyance direction.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a conveyor device suitable for transporting earth and sand excavated from, for example, an underground excavation site to the ground.

Background Art

[0002] Conventionally, when transporting earth and sand excavated from an underground excavation site or the like to the ground, a conveyor device has been used (see, for example, Patent Documents 1 to 3).

[0003] For example, the conveyor device of Patent Document 1 is wound so that the upper edge is supported by a plurality of forward-side guide pulleys along a spiral conveyance direction extending in the vertical direction in a bent state folded in two in the width direction, and is also wound so that the upper edge is supported by a plurality of return-side guide pulleys along the spiral conveyance direction in a bent state folded in two in the width direction. Further, an endless conveyor belt is provided which is folded at each folding position between a horizontal conveyance part located on the upper side of the support frame and a horizontal conveyance part located on the lower side of the support frame and is in an unfolded state expanded in the width direction in the vicinity of each folding position.

[0004] The upper edge of the conveyor belt in a bent state folded in two in the width direction is supported by sandwiching it from the outside and inside with an outer support roller and an inner support roller of a conveyor belt support mechanism. Also, this conveyor belt is in a bent state folded in two in the width direction during conveyance except in the vicinity of the folding position on both the forward side and the return side, and the excavated earth and sand is held so as to be surrounded by the conveyor belt, so there is no risk of spillage even if an emergency stop occurs during conveyance.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Patent Document 3

[0006] However, as shown in Figure 4, if a sudden stop occurs while conveying material downhill on a steeply sloped conveyor belt 1, the inertial forces acting on the contents 2, such as excavated soil, and the conveyor belt 1 are different. As a result, the contents 2 slides within the belt 1, depending solely on the coefficient of friction with the belt 1. This sliding causes a concentrated load to act on the clamp-type guide section 4 (support roller) that suspends the belt 1 from the support shaft 3. If this exceeds the design load, the belt 1 may detach from the guide section 4 and derail. As a countermeasure, it is conceivable to increase the strength of the belt, the coefficient of friction, the support roller, the support column 5, etc., but this would lead to larger structural equipment and increased equipment costs.

[0007] The present invention has been made in view of the above, and aims to provide an inexpensive conveyor device that can reduce the force from the conveyed object acting during acceleration and deceleration. [Means for solving the problem]

[0008] To solve the above-mentioned problems and achieve the objective, the present invention provides a conveyor device that accommodates objects to be conveyed in a folded state in the width direction and is equipped with a conveyor belt that travels along a conveying path that is inclined from horizontal, and is characterized by being equipped with guide members provided to reduce the inertial force acting on the objects to be conveyed and arranged in the conveying direction within the conveyor belt.

[0009] Furthermore, another conveyor device according to the present invention is characterized in that, in the above-described invention, it has a control means for synchronizing the travel speed of the conveyor belt and the guide member.

[0010] Furthermore, another conveyor device according to the present invention is characterized in that, in the above-described invention, it includes an anti-lock brake system that activates the brakes in the event of an emergency stop, and a damper that reduces the inertial force on the conveyed object via the guide member when the brakes are activated by the anti-lock brake system. [Effects of the Invention]

[0011] The conveyor device according to the present invention accommodates objects to be conveyed in a folded state in the width direction and is equipped with a conveyor belt that travels along a conveying path that is inclined from the horizontal. The conveyor device is equipped with guide members that are provided to reduce the inertial force acting on the objects to be conveyed and are arranged in the conveying belt along the conveying direction. This provides the effect of providing an inexpensive conveyor device that can reduce the force from the objects to be conveyed acting during acceleration and deceleration.

[0012] Furthermore, according to another conveyor device of the present invention, since it has a control means for synchronizing the travel speed of the conveyor belt and the guide member, it has the effect of preventing damage to the conveyor belt due to the movement of the guide member.

[0013] Furthermore, according to another conveyor device of the present invention, an anti-lock brake system that activates the brakes in the event of an emergency stop and a damper that reduces the inertial force on the conveyed object via the guide member when the brakes are activated by the anti-lock brake system have the effect of reducing damage to the equipment supporting the conveyor belt. [Brief explanation of the drawing]

[0014] [Figure 1] Figure 1 is a schematic perspective cross-sectional view showing an embodiment of the conveyor device according to the present invention. [Figure 2] Figure 2 is an explanatory diagram for downward transport. [Figure 3] Figure 3 is an explanatory diagram for upward transport. [Figure 4]FIG. 4 is a schematic side sectional view showing an example of a conventional conveyor device.

Embodiments for Carrying out the Invention

[0015] Hereinafter, embodiments of the conveyor device according to the present invention will be described in detail based on the drawings. Note that the present invention is not limited by this embodiment.

[0016] As shown in FIG. 1, a conveyor device 10 according to an embodiment of the present invention includes a conveyor belt 12 that accommodates excavated earth and sand S (the conveyed object) in a bag-like state folded in two in the width direction and travels along a conveyance path inclined from horizontal, and a guide rope 14.

[0017] As shown in FIGS. 2 and 3, the conveyor belt 12 is an endless one wound around a plurality of belt return rollers 16 arranged on the conveyance path and is supported by a plurality of guide rollers 18. By rotating the belt return roller 16 via a drive unit (not shown), the conveyor belt 12 travels in the conveyance direction X. In the inclined conveyance section with a steep slope inclined from horizontal, the conveyor belt 12 travels in a state of a bag body folded in two in the width direction. Also, in the vicinity of the horizontal conveyance section located on the upper side and the horizontal conveyance section located on the lower side in the conveyance direction X, in order to be able to receive the excavated earth and sand S supplied from the excavated earth and sand supply section M arranged above the conveyor belt 12, it is configured to travel in an unfolded state unfolded in the width direction. The switching of the unfolded state of the conveyor belt 12 can be realized by, for example, the mechanism described in Patent Document 1 above.

[0018] Further, this conveyor belt 12 is in a bag-like state folded in two in the width direction in the inclined conveyance section both during downward conveyance (outbound side) and upward conveyance (return side), and the excavated earth and sand S is held so as to be surrounded by the conveyor belt 12. Therefore, even if an emergency stop occurs during conveyance in the inclined conveyance section, there is no risk of spillage.

[0019] As shown in FIG. 1, the upper edge portion of the conveyor belt 12 is supported by being clamped from the outside and inside by an outer support roller 22 and an inner support roller 24 of a plurality of conveyor belt support mechanisms 20 arranged at intervals in the conveying direction X. The conveyor belt support mechanism 20 is fixed to a support shaft 26 such as an H-shaped steel arranged obliquely.

[0020] The guide rope 14 is provided to reduce the inertial force acting on the excavated soil S and is a guide member arranged inside the conveyor belt 12 along the conveying direction X. As shown in FIG. 1, the guide rope 14 is composed of a string-like object in which a small-diameter portion 28 and a large-diameter portion 30 having a diameter larger than that of the small-diameter portion 28 are alternately arranged in the longitudinal direction. By appropriately adjusting the friction coefficient according to the thickness, material, arrangement interval, etc. of the small-diameter portion 28 and the large-diameter portion 30 of the guide rope 14, the ability to reduce the inertial force of the excavated soil S can be ensured.

[0021] As shown in FIGS. 2 and 3, the guide rope 14 is an endless one wound around a plurality of guide rope return rollers 32 arranged on the conveying path and is supported by a plurality of guide rollers 34. The guide rope 14 is located above the conveyor belt 12 in the unfolded state in the horizontal conveying section and is arranged in the conveying direction X inside the bag-shaped conveyor belt 12 in the inclined conveying section. By rotating the guide rope return roller 32 via a drive unit (not shown), the guide rope 14 travels in the conveying direction X inside the conveyor belt in the inclined conveying section. A damper 36 is provided on the rotation shaft of the guide rope return roller 32.

[0022] It is desirable to set the position of the guide rope 14 at a position where it is surely embedded inside the excavated soil S conveyed by the bag-shaped conveyor belt 12. For example, it is preferable to arrange it at a position that functions as a core material of the excavated soil S (for example, the position at the center of the cross section). Also, it is desirable to perform speed control by control means or the like so that the running speeds of the conveyor belt 12 and the guide rope 14 are synchronized and continuously conveyed. If the running speeds are synchronized, it is possible to prevent the situation where the guide rope 14 and the conveyor belt 12 come into contact and are damaged.

[0023] Furthermore, the conveyor device 10 of this embodiment has an anti-lock braking system (not shown) that activates the brakes in the event of an emergency stop. The damper 36 acts to reduce the inertial force on the excavated soil S via the guide rope return roller 32 and guide rope 14 when the brakes are activated by this anti-lock braking system. This reduces damage to the equipment supporting the conveyor belt 12.

[0024] The conveyor system 10 of this embodiment is designed to handle sudden stops (during downward transport) and sudden starts (during upward transport) during continuous transport on steep slopes. The operation and function of each operation are described below.

[0025] (During downward transport) As shown in Figure 2, during downward transport, the conveyor belt 12 receives excavated soil S from the source excavated soil supply unit M in a state that is unfolded in the width direction in the horizontal transport section located on the upper side of the transport direction X. Subsequently, when moving to a steep incline transport section, it travels in a state that is folded in half in the width direction as a bag.

[0026] If the conveyor belt 12 comes to a sudden stop during operation, the excavated soil S will attempt to slide in the transport direction X within the bag-shaped conveyor belt 12 due to inertia. However, the frictional resistance of the guide ropes 14 within the excavated soil S reduces the sliding force. As a result, it is possible to prevent the generation of sudden forces acting on the entire equipment through the conveyor belt 12 during sudden deceleration. This eliminates the risk of the conveyor belt 12 coming off.

[0027] (When transporting upwards) As shown in Figure 3, during upward transport, the conveyor belt 12 receives excavated soil S from the source excavated soil supply unit M in a state that is unfolded in the width direction in the horizontal transport section located on the lower side of the transport direction X. Subsequently, when moving to a steep incline transport section, it travels in a state that is folded in half in the width direction.

[0028] If the conveyor belt 12 suddenly starts while the system is stopped, the excavated soil S will attempt to slide in the opposite direction to the transport direction X within the bag-shaped conveyor belt 12 due to inertia. However, the frictional resistance of the guide ropes 14 within the excavated soil S reduces the sliding force. As a result, it is possible to prevent the generation of sudden forces acting on the entire system through the conveyor belt 12 during rapid acceleration. This eliminates the risk of the conveyor belt 12 coming off.

[0029] Thus, according to this embodiment, the generation of sudden forces from the excavated soil S acting on the equipment during rapid acceleration and deceleration can be reduced. Furthermore, because it has a simple configuration using a guide rope 14 travel mechanism, a steep slope conveying device that reduces the inertial force acting on the excavated soil S can be realized inexpensively without relying on belt conveyor manufacturers. In addition, material separation of the excavated soil S can be reduced.

[0030] As described above, the conveyor device according to the present invention is a conveyor device that accommodates objects to be conveyed in a folded state in the width direction and has a conveyor belt that travels along a conveying path that is inclined from the horizontal, and has guide members provided to reduce the inertial force acting on the objects to be conveyed and arranged in the conveying direction within the conveyor belt, thereby providing an inexpensive conveyor device that can reduce the force from the objects to be conveyed acting during acceleration and deceleration.

[0031] Furthermore, according to another conveyor device of the present invention, since it has a control means for synchronizing the travel speed of the conveyor belt and the guide member, it is possible to prevent the conveyor belt from being damaged by the movement of the guide member.

[0032] Furthermore, according to another conveyor device of the present invention, since it has an anti-lock braking system that activates the brakes in the event of an emergency stop, and a damper that reduces the inertial force on the conveyed object via the guide member when the brakes are activated by the anti-lock braking system, damage to the equipment supporting the conveyor belt can be reduced. [Industrial applicability]

[0033] As described above, the conveyor device according to the present invention is useful for conveying excavated soil and sand from underground excavation sites to the surface, and is particularly suitable for reducing the force from the soil and sand acting during acceleration and deceleration. [Explanation of Symbols]

[0034] 10 Conveyor device 12 Conveyor belts 14 Guide rope (guide component) 16 Belt return roller 18,34 Guide rollers 20 Conveyor belt support mechanism 22 Outer support roller 24 Inner support roller 26 Support shaft 28 Small diameter section 30 Large diameter section 32 Guide rope return roller 36 dampers M Excavation and Soil Supply Department S Excavated soil and sand (material to be transported) X Conveying direction

Claims

1. A conveyor system that accommodates objects to be conveyed in a folded state in the width direction and has a conveyor belt that travels along a conveying path that is inclined from horizontal, A conveyor device characterized by having a guide member provided to reduce the inertial force acting on the conveyed object and arranged in the conveyor belt along the conveying direction, an anti-lock braking system that activates the brake in the event of an emergency stop, and a damper that reduces the inertial force on the conveyed object via the guide member when the brake is activated by the anti-lock braking system.

2. The conveyor device according to claim 1, characterized in that it has a control means for synchronizing the travel speed of the conveyor belt and the guide member.

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