JP2024022984A - Frame for conveyor and belt conveyor having the same - Google Patents

Abstract

To make a conveyor section simplified and lighter by eliminating the need for a width compensation section in a frame itself in a belt conveyor with the conveyor section that can be expanded and contracted in a vertical direction.SOLUTION: A belt conveyor 10 comprises a plurality of stage frames 30A-30E, which are arranged to be lifted and lowered on one side and the other side of a front-back direction X respectively, a plurality of conveyor frames 20, which are staggeredly spanned over the plurality of stage frames 30A-30E and supported at their end positions in a pivotable manner around an axis orthogonal to an expansion and contraction direction, a pair of conveyor pulleys 50, which are rotatably attached to the plurality of conveyor frames 20 and are arranged adjacent to each other so as to fold back the conveyor belt 80 at each folding position R, and a suspension support 60, which absorbs changes in the length of a conveyance path in the front-back direction X in response to the lifting and lowering of each of the stage frames 30B, 30D while supporting each of the stage frame 30B, 30D, which are aligned in the expansion and contraction direction on one side, in a suspended state.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a conveyor frame structure having a vertically expandable conveying section and a belt conveyor including the same.

As a technology related to this type of belt conveyor, for example, Patent Document 1 proposes a conveyor conveyance technology suitable for the reverse construction method. The reverse construction method (reverse winding construction method) is used in the construction of high-rise buildings when constructing an underground frame, without installing temporary struts, and by using the building itself as a support beam, from the upper floor to the lower floor. Repeat excavation and construction of underground framework.

Therefore, when adopting the reverse drilling method, as the depth of underground excavation becomes deeper (hereinafter, the deeper excavation depth is also referred to as "extension depth"), it is necessary to How efficiently the materials are transported to the above-ground area has a major impact on shortening the construction period.
On the other hand, in the conveyor conveyance technology described in Patent Document 1, as shown in a schematic diagram of the frame structure in FIG. It is arranged so that it can be expanded and retracted along the expansion and contraction direction. The plurality of conveyor frames 120 are spanned over the plurality of stage frames 130 in a staggered manner.

Each conveyor frame 120 includes a rotation support part 122 that can rotate with respect to the stage frame 130, and a width that slides to absorb changes in length in the front-rear direction X in response to deployment and storage movements. A correction unit 160 is provided.
As a result, according to the technique described in the same document, by simply moving the plurality of stage frames 130 so as to unfold in the expansion/contraction direction, the rotation support section 122 can move the conveyor frames arranged adjacently in a staggered manner to each other. It can be turned around an axis perpendicular to the direction of expansion and contraction at the positions of the mutual ends.

Then, the width correction unit 160 can slide each conveyor frame 120 so as to absorb the change in length in the front-rear direction X according to the unfolding movement and storage movement. Therefore, it is possible to improve the conveyance efficiency in conveyance in applications where the conveyance distance changes as the process progresses, such as the reverse casting method.

Japanese Patent Application Publication No. 2020-179973

However, in the technique described in the same document, as shown in FIG. 10, the plurality of stage frames 130 use support beams 170 on one side and the other side of the front-rear direction X that intersects with the expansion/contraction direction, and It is equipped to be slidable along the beam 170.
Therefore, the width correction unit 160 is required to slide the conveyor frame 120 so as to absorb the change in length in the front-rear direction X depending on the unfolding movement and storage movement. Therefore, the frame structure for configuring the width correction section 160 becomes more complicated and the conveyor apparatus becomes heavier.

SUMMARY OF THE INVENTION The present invention has been made in view of these problems, and provides a frame structure for a belt conveyor having a vertically expandable conveying section that can simplify and reduce the weight of the conveying section. An object of the present invention is to provide a belt conveyor equipped with the following.

In order to solve the above problems, a frame structure for a conveyor according to one aspect of the present invention is provided in which an endless conveyor belt is spirally wound along a plurality of conveyor frames so that loads can be conveyed, and A frame structure used in a belt conveyor having an extensible conveying section and constituting the conveying section, which can be raised and lowered along an extensible direction and on one side and the other side in a front-rear direction that intersects with the extensible direction. It spans the plurality of stage frames to be arranged and the plurality of stage frames on one side and the other side so as to have an alternating staggered posture, and is orthogonal to the expansion/contraction direction at the position of its own end. The plurality of conveyor frames are rotatably supported around an axis, and each stage frame arranged in the expansion/contraction direction is supported in a suspended state on at least one of the one side and the other side, and the conveyor frames are supported in a suspended state according to the elevation and descent of each stage frame. The present invention is characterized by comprising a hanging support portion that absorbs changes in the length of the conveyance path in the front-rear direction.

According to the frame structure for a conveyor according to one aspect of the present invention, each stage frame arranged in the expansion/contraction direction is supported in a suspended state by the hanging support part, and the length of the conveyance path in the front and back direction according to the elevation of each stage frame is Can absorb changes in temperature. Therefore, the width correction section of the conveyor frame is not required, and the conveyance section can be simplified and lightened.

In addition, in the conveyor conveyance technology described in Patent Document 1, for example, since the support beam of the building body is used as a slide guide, there is a problem in that there are restrictions on equipment for the support beam and construction on the building body side. According to the frame structure for a conveyor according to the embodiment, it is not necessary to use the support beam as a slide guide in the hanging support portion, so there are no restrictions on equipment for the support beam or construction on the building main body side.

Moreover, in order to solve the above-mentioned problem, in a frame structure for a conveyor according to another aspect of the present invention, an endless conveyor belt is spirally wound around a plurality of conveyor frames so that a load can be conveyed. A frame structure that is used in a belt conveyor and has a conveyance section that is expandable and retractable in the vertical direction, and constitutes the conveyance section, and the frame structure is used on one side and the other side in the front-rear direction that intersects with the expansion and contraction direction along the expansion and contraction direction. A plurality of stage frames arranged to be movable up and down, and a plurality of stage frames on one side and the other side so as to have an alternating staggered posture, and at the position of its own end in the expansion and contraction direction. a plurality of conveyor frames rotatably supported around axes perpendicular to the conveyor frames; and a pair of conveyor frames rotatably attached to the plurality of conveyor frames and arranged adjacently so as to fold back the conveyor belt at each folding position. and a conveyance pulley, on either the one side or the other side, each stage frame arranged in the expansion/contraction direction is supported so as to be slidable along the up/down direction of each stage frame, and can be moved in a direction other than the up/down direction. and a non-restricting portion on either one of the one side and the other side where each stage frame aligned in the expansion/contraction direction is not restrained by a member other than the plurality of conveyor frames. Features.

According to the frame structure for a conveyor according to another aspect of the present invention, either the one side or the other side is a non-restricted portion, and in the non-restricted portion, each stage frame aligned in the expansion/contraction direction is a plurality of conveyor frames. Since it is supported in a cantilevered state without being restrained by other members, it is possible to absorb changes in the length of the conveyance path in the front-rear direction as each stage frame moves up and down. Therefore, the width correction section of the conveyor frame is not required, and the conveyance section can be simplified and lightened.
In addition, in the conveyor conveyance technology described in Patent Document 1, for example, since the support beam provided by the building body is used as a slide guide, it is suitable to use the support beam provided by the building body as the support part and to use the opposite side as the non-restricted part. , the conveyor frame structure according to another aspect of the present invention can be adopted.

Furthermore, in order to solve the above problems, a conveyor frame structure according to still another aspect of the present invention is provided in which an endless conveyor belt is spirally wound around a plurality of conveyor frames so that a load can be conveyed. A frame structure that is used in a belt conveyor and has a conveying section that is expandable and retractable in the vertical direction and constitutes the conveying section, and the frame structure includes one side in the front-rear direction that intersects with the stretching direction along the stretching direction and the other side. A plurality of stage frames arranged so as to be movable up and down on each side, and a plurality of stage frames on one side and the other side so as to have an alternating staggered posture, and the above-mentioned extendable and retractable frame at the position of its own end. The plurality of conveyor frames are rotatably supported around an axis orthogonal to the direction, and the plurality of conveyor frames are rotatably attached to the plurality of conveyor frames and arranged adjacent to each other so as to fold back the conveyor belt at each folding position. a pair of conveyor pulleys, and each of the plurality of conveyor frames includes an inner frame that spans the pair of conveyor pulleys on a side where the pair of conveyor pulleys are adjacent to each other; The outer frame spanned on the side opposite to the adjacent side, and the inner frame and the outer frame are respectively connected at the folded back positions on both sides in the conveyance direction, and the pair of conveyance pulleys are rotatably attached. a connecting frame arranged so that the conveyor belt is folded back by the pair of conveyor pulleys at each folding position, and the plurality of conveyor frames are rotatable around an axis perpendicular to the stretching direction. The supporting turning support parts are provided at both ends of the inner frame and the outer frame. The support portion is characterized by having an arcuate bearing structure that rotates along an arc around an axis at a position radially apart from the center of rotation and does not interfere with the conveyor belt.

According to the frame structure for a conveyor according to still another aspect of the present invention, the plurality of conveyor frames are configured to have inner frames, outer frames, and Since the connecting frame that connects these mutually is constructed in a frame shape with a simple frame structure, the conveyor frame can be made simple and lightweight while increasing the rigidity of the conveyor frame.

In particular, the rotating support part where the conveyor belt is wrapped around has a bearing structure that rotates around a support shaft that is coaxial with the center of rotation, and a rotating arc around the axis at a separate position that does not interfere with the conveyor belt. Since it has an arc bearing structure, it is suitable for creating a compact conveyor frame structure by increasing frame rigidity and simplifying and reducing the weight of the conveyor part, while reliably preventing interference with the conveyor belt. be.

Further, in order to solve the above problems, a belt conveyor according to one aspect of the present invention includes a conveyor frame structure according to any one aspect of the present invention in a conveyance section, and a belt conveyor according to one aspect of the present invention includes a conveyor frame structure according to any one aspect of the present invention. It is characterized by an endless conveyor belt that is wound around in a spiral manner so that it can transport loads.

According to the present invention, in a belt conveyor having a conveyance section that is vertically expandable and retractable, the conveyance section can be simplified and lightened.

FIG. 1 is an overall perspective view illustrating an embodiment of a frame structure included in a belt conveyor according to one aspect of the present invention, in which a conveying section is shown in an extended state. FIG. 2 is an overall perspective view of FIG. 1 viewed from the back side. FIG. 2 is a perspective view of a conveyor frame constituting the frame structure of FIG. 1. FIG. FIG. 2 is a perspective view illustrating a pivot support part of the frame structure of FIG. 1. FIG. FIG. 3 is a side view illustrating a depth-extending operation, and the figure shows a state in which the plurality of conveyor frames are fully shortened upward. FIG. 2 is a side view illustrating the depth extending operation, and the figure shows two stage frames on the support side (second support frame and third support frame) being simultaneously lowered to an intermediate position, and a stage frame on the hanging side (first support frame) being simultaneously lowered to an intermediate position; This figure shows a state in which the hanging frame and the second hanging frame are suspended to a depth position corresponding to the descent of the two support-side stage frames. FIG. 2 is a side view illustrating the depth-extending operation, and the figure shows two stage frames on the support side (second support frame and third support frame) being simultaneously lowered to the maximum depth-extending position of the upper folded portion, and hanging down. This figure shows a state in which the stage frames on the side (the first hanging frame and the second hanging frame) are suspended to a depth position corresponding to the descent of the two stage frames on the supporting side. FIG. 3 is a side view illustrating the depth extending operation, and this figure shows the maximum depth extending state in which all the stage frames have been lowered to the maximum depth extending position of the folded portion. It is a schematic diagram explaining the drooping support part of the extension frame based on one aspect of this invention. It is a schematic diagram explaining the conventional extension depth frame which has a width correction|amendment part.

An embodiment of the present invention will be described below with appropriate reference to the drawings. Note that the drawings are schematic. Therefore, it should be noted that the relationships, ratios, etc. between thickness and planar dimensions are different from those in reality, and the drawings also include portions where the relationships and ratios of dimensions are different.
In addition, the embodiments shown below exemplify devices and methods for embodying the technical idea of the present invention. etc., are not limited to the embodiments described below.

As shown in FIGS. 1 and 2, the belt conveyor 10 of this embodiment includes a frame structure having a conveyance section that is vertically expandable and retractable. In the belt conveyor 10 of the present embodiment, an endless conveyor belt 80 is wound around the frame structure in a spiral manner along a plurality of conveyor frames 20 so as to be able to convey loads, thereby forming a conveying section.

In this embodiment, the plurality of conveyor frames 20 are arranged in two rows in the width direction, and a folded part is provided by passing the conveyor belt 80 between a pair of widthwise adjacent conveyance pulleys 50, and two rows are provided in the vertical direction. An outward path and a return path of a conveyor belt 80 that circulates endlessly are configured with stages.

Incidentally, such a winding structure of the conveyor belt 80 itself is similar to the winding structure disclosed in Patent Document 1, for example, so in this specification, in order to make the illustration and understanding of the frame structure easier to understand, the conveyor belt 80 itself is illustrated as a winding image using a two-dot chain line, and detailed illustration and detailed explanation of the winding structure of the conveyor belt 80 in this embodiment will be omitted, and the frame structure will be explained in detail.

The frame structure of this embodiment includes a plurality of stage frames 30A to 30E and a plurality of conveyor frames 20, as shown in FIG. The plurality of conveyor frames 20 are spanned along the expansion/contraction direction Z so as to have staggered staggered postures with respect to the plurality of stage frames 30A to 30E on one side and the other side in the front-rear direction that intersects with the expansion/contraction direction Z. . It should be noted that since the plurality of stage frames 30A to 30E have the same structure, they will be described below using the representative symbol "30" unless otherwise distinguished.

Each conveyor frame 20 is supported at its end with respect to the stage frame 30 so as to be rotatable around an axis perpendicular to the direction of expansion and contraction, and is arranged so as to be movable in deployment and storage along the direction of expansion and contraction. Ru.

In this embodiment, as shown in FIG. 3, each conveyor frame 20 includes an inner frame 21 that spans the pair of conveyor pulleys 50 on the side where the pair of conveyor pulleys 50 are adjacent to each other, and an inner frame 21 that spans the pair of conveyor pulleys 50 on the side where the pair of conveyor pulleys 50 are adjacent to each other. 50 has an outer frame 24 that spans the sides opposite to the adjacent sides, and a connecting frame 27 that connects the inner frame 21 and the outer frame 24 at folding positions R on both sides in the conveyance direction. Each conveyance pulley 50 is rotatably provided around a rotating shaft 51 with respect to each connecting frame 27 at both ends.

As shown in FIGS. 1 and 2, swing supports 22 and 25 that support the plurality of conveyor frames 20 so as to be able to swing around an axis perpendicular to the expansion/contraction direction Z are provided at both ends of the inner frame 21 and the outer frame 24. Each is provided.

In contrast to the rotation support parts 22 and 25, the stage frame 30 is provided with inner frame support parts 31 at two locations above and below the center of the surface of the base part facing the transport pulley 50 side. An inner arc shaft 32 is horizontally supported by the inner frame support portion 31, and is fitted into an inner arc groove 33 so as to be rotatable along the arc surface of the inner arc shaft 32.
Outer frame support portions 35 are provided at four locations on the left, right, top and bottom of the surface of the rectangular base portion facing the conveyance pulley 50 side. In the outer frame support portion 35, an outer support hole 34 is formed to pass through the axis horizontally, and an outer support shaft 36 is rotatably fitted into the outer support hole 34.

In particular, as shown in FIG. 4, the inner swing support section 22 provided on the inner frame 21 has an inner bearing section 23 that is a bearing structure that rotates around a support shaft coaxial with the center of rotation.
On the other hand, the outer swing support part 25 provided on the outer frame 24 is an outer bearing part having an arc bearing structure that rotates along an arc around an axis at a position radially apart from the swing center and which does not interfere with the conveyor belt 80. It has 26.

Returning to FIG. 1, the plurality of stage frames 30A to 30E are arranged to be movable up and down on one side and the other side in the front-rear direction, respectively. In this embodiment, the plurality of stage frames 30A to 30E are mounted on one side in the front-rear direction, for example, when used in the reverse construction method, the stage frames 30A to 30E are mounted on a building body provided along the construction site of the underground framework from the above-ground part to the underground part. It is equipped to be slidable in the vertical direction using a support beam 70 with the expansion/contraction direction Z being the vertical direction.

In this embodiment, an image of a model in which the support beam 70 is erected with the lower end supported by the support base 71 is shown. In this example, on the support beam 70 side, the stage frame 30 is supported by a rigid support structure. The support base 71 is provided with a central main slide groove 72 and sub-slide grooves 73 on either side of the main slide groove 72 along the expansion/contraction direction Z.

The stage frame 30 has the base portion in the shape of a rectangular plate. In the example of this embodiment, the upper part of the base part of the stage frame 30 is provided with a fitting convex part 38 that projects upward, and the lower part of the base part is provided with a fitting concave part 39. When the plurality of conveyor frames 20 are shortened, the fitting convex portions 38 and the fitting concave portions 39 of the vertically adjacent stage frames 30 are fitted together, so that the posture of the entire frame at the time of shortening is stabilized. It has become.

On the side opposite to the surface facing the conveyance pulley 50 of the base portion (that is, the back surface), there is a sub-slide that is fitted in the sub-slide groove 73 so as to be slidable therein, at a position facing the sub-slide groove 73 and spaced apart from side to side. A slide guide 37 is provided protrudingly. A slide frame 40 is arranged on the opposite side of the stage frame 30 with the support beam 70 interposed therebetween.
In the example of this embodiment, the slide frame 40 smoothly slides as the flexible wire 61 moves up and down on the hanging support part 60 side. The slide frame 40 is a substantially L-shaped member when viewed from the side, and includes a main slide guide 41 facing the surface of the support beam 70 and an elevation support arm that extends from the bottom of the main slide guide 41 to the side opposite to the support beam 70. 42.

A main slide part that is slidably fitted into the main slide groove 72 is formed on the surface of the main slide guide 41 on the support beam 70 side, and extends to the opposite side of the support beam 70 to form a rectangular plate of the stage frame 30. It has a rigid support structure that is fixed to the back of the shaped base. However, the rigid support structure is not limited to this. For example, the slide frame 40 can be raised and lowered by connecting a lifting wire similar to the flexible wire 61 to the lifting support arm 42.

Furthermore, an elevating mechanism that more actively moves the slide frame 40 up and down may be provided. In this case, for example, a rack is provided in the main slide groove 72, a drive motor is installed on the upper surface of the lifting support arm 42, and a drive pinion provided on the output shaft of this drive motor is meshed with the rack. A lifting mechanism can be configured by a pinion mechanism.

On the other hand, in this embodiment, the hanging support part 60 is provided on the other side in the front-rear direction X. The hanging support part 60 supports each of the stage frames 30B and 30D aligned in the expansion/contraction direction Z in a suspended state on the other side in the front-rear direction X.
The hanging support portion 60 of this embodiment is configured to absorb changes in the length of the conveyance path in the front-rear direction using the flexible wire 61. As a result, the plurality of conveyor frames 30A to 30E are arranged in a spiral position in which the conveyor belt 80 is folded back at the position of the plurality of stage frames 30, so as to be bendable and extensible along the depth direction at the construction site of the underground framework.

Next, the effects of the belt conveyor 10 of this embodiment will be explained.
When extending the depth of the belt conveyor 10 of this embodiment, as shown in FIG. 5, the extension is started from a state in which the plurality of conveyor frames 20 are fully shortened upward. As shown in FIG. 6, first, the two stage frames on the supporting side (the second supporting frame and the third supporting frame) are simultaneously lowered to an intermediate position, and the stage frames on the hanging side (the first hanging frame and the second hanging frame) are simultaneously lowered to an intermediate position. frame) is suspended to a depth position corresponding to the descent of the two stage frames on the supporting side.

Next, as shown in FIG. 7, the two stage frames on the support side (the second support frame and the third support frame) are simultaneously lowered to the maximum depth position of the upper folded part, and the stage frames on the hanging side (the second support frame) are lowered simultaneously. (the first hanging frame and the second hanging frame) are suspended to a depth position corresponding to the descent of the two supporting side stage frames.

Next, as shown in FIG. 8, all the stage frames are lowered to the maximum depth position of the folded portion, thereby achieving the maximum depth.
In this way, in the belt conveyor 10 of this embodiment, each of the stage frames 30A to 30E can be raised and lowered in the depth direction, and the plurality of conveyor frames 20 are arranged in a staggered manner at the position of the stage frame 30 at the end thereof. Since the rotating support parts 22 and 25 are arranged in the horizontal direction and are connected to each other so as to be able to rotate around an axis horizontal to the depth extension direction, the conveyor frames 20 disposed adjacent to each other can be moved up and down by raising and lowering each stage frame 30. The mutual arrangement posture can be bent and stretched at the support position of the end of each conveyor frame 20 according to the depth-stretching operation.

Here, in the technique described in Patent Document 1, as described with reference to the schematic diagram in FIG. Equipped with 170.
Therefore, the width correction unit 160 that slides so as to absorb the change in length in the front-rear direction X depending on the unfolding movement and storage movement is required. Therefore, the structure becomes complicated and the device becomes heavy, and since the support beam 170 is used by the building body, there are restrictions on equipment for the support beam 170 and construction on the building body side.

On the other hand, in the belt conveyor 10 of the present embodiment, the hanging support part 60 is provided on the other side in the front-rear direction X, and the hanging support part 60 is provided on the other side in the front-rear direction Each of the stage frames 30B and 30D that are lined up can be supported in a suspended state.
As a result, according to the belt conveyor 10 of the present embodiment, by simply extending the hanging support portion 60 so as to unfold the plurality of stage frames 30A to 30E in the extending/contracting direction Z, the belt conveyor 10 of the present embodiment The frames 20 can be rotated around an axis perpendicular to the expansion/contraction direction Z at the positions of the mutual ends. Therefore, it is possible to improve the conveyance efficiency in conveyance in applications where the conveyance distance changes as the process progresses.

Since the hanging support part 60 hangs down each of the stage frames 30B and 30D on the other side by means of a flexible wire 61, the hanging support part 60 hangs down each of the stage frames 30B and 30D on the other side. As shown in the image, it is possible to absorb changes in the length of the transport path in the front-rear direction X in accordance with the elevation of each stage frame 30A to 30E.
Therefore, the support position of at least one end of each conveyor frame 30A to 30E can be slid while absorbing the change in length in the front-rear direction X according to the unfolding movement and storage movement. Therefore, according to the belt conveyor 10 of this embodiment, the width correction section of the conveyor frame 20 is not required, and the conveyance section can be simplified and lightened [Invention 1, Invention 7].

In particular, according to the belt conveyor 10 of this embodiment, as shown in a schematic diagram in FIG. , which is suitable for making the width correction section of the conveyor frame 20 unnecessary and simplifying and reducing the weight of the conveyance section [Invention 2].

Furthermore, according to the belt conveyor 10 of the present embodiment, as shown in FIG. It has an outer frame 24 that is spanned on the side opposite to the side where the pulleys 50 are adjacent to each other, and a connecting frame 27 that connects the inner frame 21 and the outer frame 24 at folded back positions on both sides in the conveyance direction, Since the conveyance pulley 50 is rotatably provided with respect to each connection frame 27, it is more suitable for simplifying and reducing the weight of the conveyance section [Invention 4].

In particular, according to the belt conveyor 10 of this embodiment, the rotation support parts 22 and 25 that support the plurality of conveyor frames 20 so as to be rotatable around the axis orthogonal to the expansion/contraction direction Z are connected to the inner frame 21 and the outer frame 24. are provided at both ends of the .
As shown in FIG. 4, the outer swing support part 25 provided on the outer frame 24 is an outer bearing part 26 having a bearing structure that rotates around a support shaft coaxial with the swing center axis Ck, and The inner rotation support part 22 provided in the rotation center axis Ck is an inner bearing part 23 of an arcuate bearing structure that rotates along an arc around the axis at a position radially apart from the rotation center axis Ck and does not interfere with the conveyor belt 80. , which is more suitable for simplifying and reducing the weight of the conveying section [Invention 5 and Invention 6].

As explained above, according to the conveyor frame structure of the present embodiment and the belt conveyor 10 including the same, the width correction section of the conveyor frame 20 is not required, and the conveyance section can be simplified and lightened.
It should be noted that the conveyor frame structure according to the present invention and the belt conveyor including the same are not limited to the above embodiments, and it goes without saying that various modifications can be made without departing from the spirit of the present invention. .

For example, the hanging support portion can adopt various hanging methods as long as it has a hanging structure that allows the stage frame 30 to be suspended in the air during the depth extension process.
For example, as in the above embodiment, when either the front or rear side is supported by a hanging support part (one side is a support part restrained by a rigid structure and the other side is a suspended hanging support part), it is of course possible to It is also possible to support it with hanging support parts suspended in the air on both sides (both sides are hanging support parts). In addition, when both the front and rear sides are used as hanging support parts, it is preferable to further include an auxiliary wire for stabilizing the hanging posture.

Further, in this case, each stage frame 30 may be suspended by an individual wire as in the above embodiment. In this case, the portion connecting each stage frame 30 and the wire may have a fixed structure or a pivot structure.
Furthermore, each stage frame 30 can be hung integrally on either the front or rear side using a structure in which a single wire is wound (see the winding structure shown on the right side of the schematic diagram in FIG. 9). In this way, when one wire is wound and hung integrally, a hanging support structure can be provided through pulleys for hanging support provided on each stage frame 30.

Furthermore, instead of the hanging support part, it is also possible to use an unrestricted part in which each stage frame 30 aligned in the expansion/contraction direction is not restrained by any member other than the plurality of conveyor frames 20 on either one side or the other side. [Invention 3].

That is, in the model shown in FIG. 1, even when the flexible wire 61 is not provided, the attitude of the belt conveyor 10 shown in the figure can be maintained. For example, by providing a rigid support structure on the side of the support beam 70 with sufficient rigidity and an elevating mechanism such as the above-mentioned rack and pinion, each stage frame 30 aligned in the expansion/contraction direction can be moved along the elevating direction of each stage frame 30. It is possible to configure a support portion that supports the slider so as to be slidable and restrains movement in directions other than the up-and-down direction.

If the connection structure between each stage frame 30 and the conveyor frame 20 on the opposite side of the support beam 70 by the plurality of conveyor frames 20 can maintain the conveyance posture and conveyance function necessary and sufficient for conveying the load, the support Regarding the side opposite to the beam 70, the belt conveyor 10 can also be constructed by making each stage frame 30 lined up on the opposite side an unrestricted portion that is not restrained by members other than the plurality of conveyor frames 20.

In the unrestricted portion, each stage frame 30 aligned in the expansion/contraction direction is supported in a cantilevered state without being restrained by any member other than the plurality of conveyor frames 20, so that the stage frames 30 are supported in the front-back direction as each stage frame 30 moves up and down. Can absorb changes in the length of the conveyance path. Therefore, even with such a configuration, the width correction section of the conveyor frame 20 is not necessary, and the conveyance section can be simplified and lightened.

10 Belt conveyor 20 Conveyor frame 21 Inner frame 22 Inner turning support part 23 Inner bearing part 24 Outer frame 25 Outer turning support part 26 Outer bearing part 27 Connection frame 30 (30A to 30E) Stage frame 31 Inner frame support part 32 Inner circular arc shaft 33 Inner circular arc groove 34 Outer support hole 35 Outer frame support part 36 Outer support shaft 37 Sub-slide guide 38 Fitting convex part 39 Fitting recess 40 Slide frame 41 Main slide guide 42 Lifting support arm 50 Transport pulley 51 Rotating shaft 60 Hanging support Part 61 Flexible wire 70 Support beam 71 Support base 72 Main slide groove 73 Sub-slide groove 80 Conveyor belt Ck Rotating center axis Z Stretching direction

Claims (7)

A frame structure that is used in a belt conveyor, in which an endless conveyor belt is wound around a plurality of conveyor frames in a spiral manner so as to be able to convey loads, and has a conveying section that is vertically expandable and retractable, and that constitutes the conveying section. And,
a plurality of stage frames arranged so as to be movable up and down on one side and the other side in a front-rear direction that intersects with the expansion/contraction direction along the expansion/contraction direction;
It is spanned over the plurality of stage frames on one side and the other side so as to have an alternating staggered posture, and is supported at its own end so as to be pivotable around an axis perpendicular to the expansion/contraction direction. the plurality of conveyor frames;
a pair of conveyor pulleys rotatably attached to the plurality of conveyor frames and arranged adjacently so as to fold back the conveyor belt at each folding position;
At least one of the one side and the other side supports each stage frame arranged in the expansion/contraction direction in a suspended state, and also droops to absorb changes in the length of the conveyance path in the front-rear direction as each stage frame moves up and down. a support part;
A conveyor frame structure characterized by comprising: 2. The frame structure for a conveyor according to claim 1, wherein the hanging support portion absorbs changes in the length of the conveyance path in the front-rear direction using a flexible wire. A frame structure that is used in a belt conveyor, in which an endless conveyor belt is wound around a plurality of conveyor frames in a spiral manner so as to be able to convey loads, and has a conveying section that is vertically expandable and retractable, and that constitutes the conveying section. And,
a plurality of stage frames arranged so as to be movable up and down on one side and the other side in a front-rear direction that intersects with the expansion/contraction direction along the expansion/contraction direction;
It is spanned over the plurality of stage frames on one side and the other side so as to have an alternating staggered posture, and is supported at its own end so as to be pivotable around an axis perpendicular to the expansion/contraction direction. the plurality of conveyor frames;
a pair of conveyor pulleys rotatably attached to the plurality of conveyor frames and arranged adjacently so as to fold back the conveyor belt at each folding position;
a support section on either one of the one side and the other side that supports each stage frame aligned in the expansion/contraction direction so as to be slidable along the up/down direction of each stage frame, and restrains movement in directions other than the up/down direction; and,
a non-constraint portion on either the one side or the other side where each stage frame aligned in the expansion/contraction direction is not constrained by any member other than the plurality of conveyor frames;
A conveyor frame structure characterized by comprising: The plurality of conveyor frames include an inner frame that spans the pair of conveyor pulleys on a side where the pair of conveyor pulleys are adjacent to each other, and an inner frame that spans the pair of conveyor pulleys on a side opposite to the side where the pair of conveyor pulleys are adjacent to each other. It has an outer frame to be spanned, and a connecting frame that connects the inner frame and the outer frame at the folding positions on both sides in the conveyance direction,
The frame structure for a conveyor according to claim 1, wherein the conveyance pulley is rotatably provided with respect to each connection frame. A swing support part that supports the plurality of conveyor frames so as to be able to swing around an axis perpendicular to the expansion/contraction direction is provided at both ends of the inner frame and the outer frame,
The rotation support part of the outer frame has a bearing structure that rotates around a support shaft coaxial with the rotation center,
The conveyor frame according to claim 4, wherein the rotation support portion of the inner frame has a sliding bearing structure along a circular arc surface around an axis at a position radially apart from the rotation center and not interfering with the conveyor belt. structure. A frame structure that is used in a belt conveyor, in which an endless conveyor belt is wound around a plurality of conveyor frames in a spiral manner so as to be able to convey loads, and has a conveying section that is vertically expandable and retractable, and that constitutes the conveying section. And,
a plurality of stage frames arranged so as to be movable up and down on one side and the other side in a front-rear direction that intersects with the expansion/contraction direction along the expansion/contraction direction;
It is spanned over the plurality of stage frames on one side and the other side so as to have an alternating staggered posture, and is supported at its own end so as to be pivotable around an axis perpendicular to the expansion/contraction direction. the plurality of conveyor frames;
a pair of conveyor pulleys rotatably attached to the plurality of conveyor frames and arranged adjacently so as to fold back the conveyor belt at each folding position;
Equipped with
The plurality of conveyor frames are
an inner frame that spans the pair of conveyance pulleys on sides where the pair of conveyance pulleys are adjacent to each other;
an outer frame spanned on a side opposite to the side where the pair of conveyance pulleys are adjacent to each other;
The inner frame and the outer frame are connected at the folding positions on both sides in the conveyance direction, and the pair of conveyor pulleys are rotatably attached, and the conveyor belt is folded back by the pair of conveyor pulleys at each folding position. A connecting frame arranged like this,
has
A swing support part that supports the plurality of conveyor frames so as to be able to swing around an axis perpendicular to the expansion/contraction direction is provided at both ends of the inner frame and the outer frame,
The rotation support part of the outer frame has a bearing structure that rotates around a support shaft coaxial with the rotation center,
A frame structure for a conveyor, wherein the rotation support part of the inner frame has an arc bearing structure that rotates along an arc around an axis at a position radially apart from the rotation center and does not interfere with the conveyor belt. . A belt conveyor in which an endless conveyor belt is wound around a plurality of conveyor frames in a spiral manner so as to be able to convey loads, and has a conveying section that can be expanded and contracted in the vertical direction,
The conveyor section is provided with the conveyor frame structure according to any one of claims 1 to 6,
A belt conveyor characterized in that an endless conveyor belt is wound around the plurality of conveyor frames in a spiral manner so as to be able to convey loads.

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