JP-7856499-B2 - Conveyor device

Inventors

• 小島 英郷

Assignees

• 清水建設株式会社

Dates

Publication Date

20260511

Application Date

20220614

Claims (2)

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.

Description

This invention relates to a conveyor device suitable for transporting excavated soil and sand from, for example, an underground excavation site to the surface. Conventionally, conveyor systems have been used to transport excavated soil from underground excavation sites to the surface (see, for example, Patent Documents 1-3). For example, the conveyor device described in Patent Document 1 includes an endless conveyor belt that is folded in half in the width direction, wound so that its upper edge is supported by multiple forward-side guide pulleys along a spiral conveying direction extending vertically, and also wound so that its upper edge is supported by multiple return-side guide pulleys along a spiral conveying direction, and further folded back at the respective folding points of the horizontal conveying section located on the upper side of the support frame and the horizontal conveying section located on the lower side of the support frame, and unfolded in the width direction near each folding point. The upper edge of the bent conveyor belt, folded in half in the width direction, is supported by being clamped from both the inside and outside by the outer and inner support rollers of the conveyor belt support mechanism. Furthermore, this conveyor belt remains folded in half in the width direction during transport, except near the folding point, both on the forward and return journeys. Since the excavated soil is held and surrounded by the conveyor belt, there is no risk of spillage even if an emergency stop occurs during transport. Japanese Patent Publication No. 2018-2404Japanese Patent Publication No. 2018-167995Japanese Patent Publication No. 2020-179973 Figure 1 is a schematic perspective cross-sectional view showing an embodiment of the conveyor device according to the present invention.Figure 2 is an explanatory diagram for downward transport.Figure 3 is an explanatory diagram for upward transport.Figure 4 is a schematic side cross-sectional view showing an example of a conventional conveyor system. The following describes in detail an embodiment of the conveyor device according to the present invention, based on the drawings. However, this embodiment does not limit the invention. As shown in Figure 1, the conveyor device 10 according to an embodiment of the present invention contains excavated soil S (material to be conveyed) in a bag-like state folded in half in the width direction, and includes a conveyor belt 12 that travels along a conveying path that is inclined from horizontal, and a guide rope 14. As shown in Figures 2 and 3, the conveyor belt 12 is an endless belt wrapped around multiple belt return rollers 16 arranged on the transport path and supported by multiple guide rollers 18. The conveyor belt 12 travels in the transport direction X by rotating the belt return rollers 16 via a drive unit (not shown). In steep incline transport sections, the conveyor belt 12 travels in a folded-in-half bag-like state in the width direction. Furthermore, near horizontal transport sections located above and below the transport direction X, the conveyor belt 12 is configured to travel in an expanded state in the width direction to accommodate excavated soil S supplied from the excavated soil supply unit M located above it. This switching of the expanded state of the conveyor belt 12 can be achieved, for example, by the mechanism described in Patent Document 1. Furthermore, in both downward (forward) and upward (return) transport sections, the conveyor belt 12 is folded in half in the width direction, forming a bag-like structure. Since the excavated soil S is held and surrounded by the conveyor belt 12, there is no risk of spillage even if an emergency stop occurs during transport in the inclined section. As shown in Figure 1, the upper edge of the conveyor belt 12 is supported by being clamped from both the inside and outside by the outer support rollers 22 and inner support rollers 24 of a conveyor belt support mechanism 20, which is 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-beam, which is arranged at an inclination. The guide rope 14 is a guide member provided to reduce the inertial force acting on the excavated soil S, and is positioned within the conveyor belt 12 along the transport direction X. As shown in Figure 1, the guide rope 14 is composed of a string-like material with small-diameter sections 28 and large-diameter sections 30, which have a larger diameter than the small-diameter sections 28, arranged alternately in the longitudinal direction. By appropriately adjusting the coefficient of friction through the thickness, material, and spacing of the small-diameter sections 28 and large-diameter sections 30 of the guide rope 14, the ability to reduce the inertial force of the excavated soil S can be ensured. As shown in Figures 2 and 3, the guide rope 14 is an endless rope wrapped around multiple gu