Roller fall prevention fitting

Abstract

The present invention provides a roller fall prevention fitting that can be installed between support brackets that form a predetermined angle with each other, thereby simultaneously reinforcing and supporting each roller with a single item to prevent each roller from falling off its respective support bracket. [Solution] The roller fall prevention fitting A includes a first latching member 11 that latches onto and holds the rotation shaft 72 of the center roller 7 pivotally supported by the support bracket 83, a second latching member 12 that is rotatably connected to the first latching member and latches onto and holds the rotation shaft 72 of the side roller 7a pivotally supported by the support bracket 82, a spring hinge 4 that biases the first latching member and the second latching member away from each other in the rotational direction, an operating lever 13 provided on the second latching member that rotates the second latching member and adjusts the angle between the second latching member and the first latching member in the rotational direction, and a pressing bolt 6 that indirectly presses the second latching member against the second support bracket.

Description

Technical Field

[0001] The present invention relates to a roller dropout prevention fitting used, for example, in an idler device for a carrier of a belt conveyor. Specifically, by attaching it between support brackets that form a predetermined angle with each other, it can be simultaneously reinforced and supported by one item so that play in the shaft support portion of the roller and dropout of the roller do not occur, and it also relates to a fitting that has good workability for attachment to each support bracket.

Background Art

[0002] A belt conveyor is provided with an idler device for a carrier that supports the carrier side of a conveyor belt at a predetermined interval in the conveying direction. The rollers of the idler device for a carrier rotate at high speed by contact with the conveyor belt on which the conveyed material is placed. For example, when the conveyed material is a granular solid, the conveyor belt hits the rollers, causing noise due to play in the shaft support portion of the rollers or the conveyor may stop due to the occurrence of roller dropout.

[0003] And when the occurrence of play in the shaft support portion of such rollers and roller dropout is assumed, measures are taken to prevent their occurrence. As such an idler device for a carrier, for example, the roller device of a belt conveyor described in Patent Document 1 is known. This conventional roller device is structured such that both ends of a round bar-shaped shaft body into which the roller is rotatably inserted are respectively inserted into insertion holes formed in a support plate fixed to the side plates of the support brackets by fixing tools, and thus it is supported by the support brackets.

[0004] According to the shaft support portion of this roller, there is no worry about play occurring in the shaft support portion of the roller, and since the shaft body is not directly supported by the concave groove but is supported by the support brackets through the insertion holes formed in the support plate, it is said that there is no worry about the roller dropping out regardless of the attitude of attachment of the support brackets to the support frame.

Prior Art Documents

Patent Documents

[0005] [Patent Document 1] Japanese Utility Model Publication No. 5-44910 [Overview of the project] [Problems that the invention aims to solve]

[0006] However, conventional belt conveyor roller systems had the following problems: In other words, conventionally, carrier idler devices that correspond to the roller devices of belt conveyors often consist of, for example, a horizontal center roller and side rollers on both sides that are inclined upwards outward.

[0007] In such carrier idler devices, even if one attempts to place the conventional belt conveyor roller device on the adjacent sides of the center roller and side roller, it is structurally bulky and therefore difficult to incorporate. In particular, the workability during maintenance such as roller replacement is extremely poor, making its adoption difficult.

[0008] Furthermore, when adopting the technology described in Patent Document 1, if rattling of the roller shaft support or roller detachment is anticipated, a pre-drilled substrate can be used. However, if rattling of the roller shaft support or roller detachment occurs, or if there is a possibility of such occurrences, after the belt conveyor has been started, drilling holes in the already installed substrate is essential for fixing with fasteners, which is a very time-consuming process.

[0009] This invention was conceived in view of the above points, and aims to provide a roller fall prevention fitting that can simultaneously reinforce and support the roller shaft support and prevent the roller from falling off by being installed between support brackets that form a predetermined angle with each other, and that also offers good workability in terms of installation to each support bracket. [Means for solving the problem]

[0010] [1] To achieve the above objective, the present invention provides a roller fall prevention fitting to be attached between a first support bracket that pivotally supports a first roller and a second support bracket adjacent to the first support bracket, which pivotally supports a second roller provided at a predetermined angle with respect to the first roller, the fitting comprising: a first latching member that latches onto and holds the rotation axis of the first roller pivotally supported by the first support bracket; a second latching member that is rotatably connected to the first latching member and latches onto and holds the rotation axis of the second roller pivotally supported by the second support bracket; a biasing member that biases the first latching member and the second latching member in a direction that moves them away from each other in the rotational direction; and a pressing member that screws onto the first latching member to directly or indirectly press the second latching member against the second support bracket.

[0011] The roller fall prevention fitting of the present invention can be held by the first latching member by latching onto the rotation axis of the first roller, which is pivotally supported on the first support bracket. The second latching member is connected to the first latching member, is rotatable relative to the first latching member, and can be held by latching onto the rotation axis of the second roller, which is pivotally supported on the second support bracket.

[0012] Furthermore, the biasing member can bias the first locking member and the second locking member in a direction that moves them away from each other in the rotational direction. As a result, the first locking member and the second locking member can, under normal conditions, stop at a predetermined position in the rotational direction and maintain a predetermined shape.

[0013] By screwing the pressing member into the first locking member, the second locking member can be pressed directly or indirectly against the second support bracket. As a result, the first locking member acts as a fulcrum, and the first and second locking members are pressed more firmly against the first and second support brackets. This makes the locking state of the first and second rollers on their respective rotation axes stronger and less likely to come loose.

[0014] Thus, according to the roller fall prevention fitting of the present invention, by attaching it between a first support bracket and a second support bracket that form a predetermined angle with respect to each other, and by hooking the first and second hooking members onto the rotation axes of the first and second rollers that are pivotally supported on each support bracket, it is possible to simultaneously reinforce and support them with a single item so that they do not fall off each support bracket, and the workability of attaching it to each support bracket is also good.

[0015] [2] The roller fall prevention fitting of the present invention is provided on the second latching member and includes an operating member that can rotate the second latching member to adjust the angle between the second latching member and the first latching member in the rotational direction of the second latching member, and the pressing member may be configured to press the operating member to indirectly press the second latching member against the second support bracket.

[0016] In this case, the second latching member can be rotated by an operating member provided on the second latching member, thereby adjusting the angle between the second latching member and the first latching member in the direction of rotation. Furthermore, since the second latching member can be pressed indirectly rather than directly, it is possible to not only press it hard, but also to give the operating member pressed by the pressing member flexibility (springiness), for example, to suppress damage to various parts due to impact.

[0017] Furthermore, since the operating member can adjust the angle between the second latching member and the first latching member, it is easier to adjust the angle between the first and second latching members when installing the roller fall prevention fitting between the first and second support brackets, resulting in excellent workability during installation and removal.

[0018] [3] The roller fall prevention fitting of the present invention may also be configured such that the base of the operating member rises substantially vertically from a predetermined location on the second latching member, and when the first latching member is latched onto the rotation axis of the first roller and the second latching member is latched onto the rotation axis of the second roller, the rising direction of the base and the pressing direction of the pressing member form a substantially 90-degree angle.

[0019] In this case, with the second latching member latched onto the rotation axis of the second roller, the pressing member can press the base of the operating member at approximately a 90-degree angle to the rising direction, and since the force at the contact point between the pressing member and the base is less likely to escape, the pressing force (or supporting force) can be effectively applied to the operation.

[0020] [4] The roller fall prevention fitting of the present invention may also be configured such that the first latching member has a first latching hole formed for fitting onto and latching the rotation shaft of the first roller, and the second latching member has a second latching hole formed for fitting onto and latching the rotation shaft of the second roller.

[0021] In this case, the first locking hole can be fitted onto the rotation axis of the first roller, and the second locking hole can be fitted onto the rotation axis of the second roller, so that as long as each locking hole is securely fitted onto each rotation axis, the first locking member and the second locking member will not be misaligned with respect to the rotation axis of each roller that is supported. This makes it possible to more reliably prevent each roller from falling off the first support bracket and the second support bracket.

[0022] [5] The roller fall prevention fitting of the present invention may also be configured such that, in the normal state in which the biasing force of the biasing member is released, the angle between the outer surfaces of the first latching member and the second latching member is greater than the angle between the first support bracket and the second support bracket.

[0023] In this case, when attaching the roller detachment prevention fitting between the first support bracket and the second support bracket, when it is stored, by simply relaxing the force that attempts to bring the first latching member and the second latching member closer to each other and releasing the biasing force, the biasing force of the biasing member acts on the first latching member and the second latching member, and it is temporarily fixed naturally between the respective support brackets. As a result, the operation of adjusting and storing the first latching member and the second latching member at an appropriate angle is easy, and the attachment and detachment operations of the roller detachment prevention fitting can be performed easily.

[0024] 〔6〕The roller detachment prevention fitting of the present invention can also be configured such that the pressing member is screwed to a screwing plate provided at a predetermined angle on the first latching member.

[0025] In this case, since the pressing member is screwed to a screwing plate provided at a predetermined angle on the first latching member, by appropriately setting the angle of the screwing plate, the direction of the pressing member can be appropriately adjusted, for example, by aligning it with an appropriate position of the operating member or setting the angle with respect to the contacting portion.

[0026] 〔7〕The roller detachment prevention fitting of the present invention can also be configured such that the portion where the pressing member is screwed has a loosening prevention structure.

[0027] In this case, due to the loosening prevention structure of the portion where the pressing member is screwed, the pressing member does not loosen even after being screwed and tightened, so the force for latching and holding against the rotation axes of the first roller and the second roller by the first latching member and the second latching member by the pressing member is maintained, and it is possible to prevent the functionality of preventing the rollers from detaching from the first support bracket and the second support bracket from being impaired.

[0028] 〔8〕The roller detachment prevention fitting of the present invention can also be configured such that a through-hole is provided in the first latching member, and the tip of the operating member can be inserted into the through-hole and can be operated in the inserted state.

[0029] In this case, the tip of the operating lever can be inserted into the opening provided in the first latching member, and it can be operated while inserted. Therefore, when adjusting the opening angle of the first latching member and the second latching member, inserting the lever into the opening makes it easier to operate from the outside of the opening, and stable operation is possible.

[0030] [9] The roller fall prevention fitting of the present invention may also be configured such that the first latching member is latched and held on the rotation axis of the first roller which is pivotally supported horizontally, and the second latching member is latched and held on the rotation axis of the second roller which forms a predetermined vertical angle with respect to the first roller.

[0031] In this case, when the roller fall prevention fitting is installed between the first support bracket and the second support bracket, the direction of the pressing member (pressing direction: the direction in which it moves when screwed in) is set at a predetermined angle with respect to the vertical direction. This makes it easier to rotate and tighten the pressing member, and to loosen and remove it. In addition, gravity acts in a direction that intersects the longitudinal direction of the screwed pressing member at a predetermined angle, increasing the frictional force of the screwed portion, so a loosening prevention effect can be expected. [Effects of the Invention]

[0032] The present invention provides a roller fall prevention fitting that can be installed between support brackets that form a predetermined angle with each other, thereby simultaneously reinforcing and supporting the roller's pivot point and preventing the roller from falling off, all with a single item, and also offers good workability in terms of installation to each support bracket. [Brief explanation of the drawing]

[0033] [Figure 1] This diagram illustrates one embodiment of the roller fall prevention fitting of the present invention, where (a) is a front view, (b) is a partial view taken along arrow X, and (c) is a partial view taken along arrow Y. [Figure 2] The image shows the metal fitting body with the pressure bolt removed from the roller fall prevention fitting. (a) is a front view, (b) is a top view, (c) is a bottom view, (d) is a left side view, and (e) is a right side view. [Figure 3] This is a front view diagram illustrating the movable part of the roller fall prevention fitting. [Figure 4] This is a front view explanatory diagram showing a configuration in which roller fall prevention fittings are placed at two locations on the sides of the center roller and both side rollers that are close to each other, and the center roller and both side rollers are pivotally supported by an inner roller support member and an outer roller support member so that they can rotate. [Figure 5] The diagram shows the internal roller support member where the roller fall prevention fitting is located; (a) is a perspective view from the front, and (b) is a perspective view from the rear. [Figure 6] This is a perspective view illustrating the tip sections of the center roller and side rollers of a carrier idler device that employs roller fall prevention fittings. [Figure 7] This is a front view explanatory diagram showing the arrangement of the roller fall prevention fitting on the inner roller support member and the axial support state of the right-side axial support of the center roller and side roller in Figure 12. [Figure 8] This is a front view explanatory diagram showing the arrangement of the roller fall prevention fitting on the inner roller support member and the axial support state of the left-side pivot point of the center roller and side roller in Figure 12. [Figure 9] Figures 7 and 8 are explanatory diagrams showing a front view from direction F. [Figure 10] Figures 7 and 8 are explanatory diagrams showing a front view from direction H. [Figure 11] This is a perspective view diagram showing the pivot structure of the center roller, reinforced with roller fall prevention fittings, with the side rollers omitted. [Figure 12] This is a perspective view diagram showing the pivot structure of a side roller reinforced with a roller fall prevention fitting, with the center roller omitted. [Modes for carrying out the invention]

[0034] The embodiments of the roller fall prevention fitting of the present invention will be described in more detail with reference to Figures 1 to 12. In the following description of the roller fall prevention fitting A, Figures 1 to 3 will be the main references. For the sake of explanation, the roller fall prevention fitting A shown in Figure 1 is shown with the second latching member 12, which will be described later, at a right angle to the screw plate 112.

[0035] (Metal fitting body 1) The roller fall prevention fitting A consists of a fitting body 1 and a pressing bolt 6, and is made of a metal such as steel that has sufficient strength and toughness. The fitting body 1 has a first latching member 11 and a second latching member 12.

[0036] (First latching member 11) The first latching member 11 has a substantially rectangular latching plate 110 of a predetermined length and width, and a substantially rectangular connecting plate 111 of the same predetermined length and width is connected to the latching plate 110 in a substantially right-angle direction. Furthermore, a substantially rectangular screwing plate 112 of the same predetermined length and width is connected to the connecting plate 111 in a substantially 45° direction.

[0037] A circular locking hole 113 is provided near the tip of the locking plate 110, which fits onto the rotating shaft 72 of the center roller 7, described later. Also, a rectangular lever opening 114 is provided near the center of the connecting plate 111, through which the operating lever 13, described later, is inserted. Furthermore, a circular bolt hole 115 is provided through the base of the screw plate 112.

[0038] (Pressing bolt 6) Furthermore, a nut is fixed to the outer surface of the screw plate 112 at a position centered with the bolt hole 115. The pressing bolt 6, which is a pressing member, is screwed onto the fixing nut 3 from the outside with its threaded portion 60, and passes through the bolt hole 115 (see Figure 1(a)).

[0039] Furthermore, a nut 3a is screwed onto the outside of the fixing nut 3 on the threaded portion 60 of the pressure bolt 6. The combination of the fixing nut 3 and the nut 3a prevents the pressure bolt 6 from loosening by stopping the rotation of the pressure bolt 6 at a predetermined threaded position and tightening the nut 3a.

[0040] Furthermore, the push bolt 6 can be screwed in when the second latching member 12, which will be described later, stops at the opening angle shown in Figure 1(a), as described later. This allows the tip of the screw portion 60 to come into contact with the pressing portion 130 of the operating lever 13, and by screwing it in further, the second latching member 12 can be pushed in the direction of opening.

[0041] (Second latching member 12) A second locking member 12, which is approximately rectangular in shape and of a predetermined length and width, is rotatably attached to the tip of the screw plate 112 of the first locking member 11 via a spring hinge 4 positioned on the inner surface. The spring hinge 4 is a structure in which a rotatable hinge and a spring, which is a biasing member, are integrally provided, but this is not the only option, and a structure in which the rotatable mounting and the biasing member are separate components may be used instead of the spring hinge 4.

[0042] The second latching member 12 is biased to open relative to the first latching member 11 by the force of the spring (torsion coil spring) 40 of the spring hinge 4, and in the normal state (when the biasing force of the spring is released), it stops at a position where the screw plate 112 and the second latching member 12 are on the same plane in the rotational direction (see Figure 2(a)).

[0043] The second latching member 12 is provided with a circular latching hole 120 near its tip, which fits onto the rotating shaft 72 of the side roller 7a, as described later. The latching hole 120, along with the latching hole 113 of the first latching member 1, has an inner diameter slightly larger than the diameter of the rotating shafts 72 of the center roller 7 and the side roller 7a, allowing for a nearly gap-free fit.

[0044] In the normal state with the biasing force released, the angle between the latching plate 110 of the first latching member 11 and the second latching member 12, that is, the opening angle of the second latching member 12 relative to the first latching member 11 in Figure 3, is formed to be larger than the angle of the support brackets 82 and 83 of the internal roller support member 8, which will be described later, but is not limited to this.

[0045] (Operating lever 13) Furthermore, an operating lever 13, which is a plate-shaped operating member that is somewhat narrow and of a predetermined length, is provided approximately in the center of the inner surface of the second latching member 12. The operating lever 13 has a pressing portion 130 formed perpendicular to the second latching member 12 at its base, and is further bent at approximately 45° in the middle of its length to form an operating portion 131. The operating lever 13 then fits through the lever opening 114 when the second latching member 12 is at a predetermined angle to the first latching member 11 (see Figure 3).

[0046] Here, referring to Figures 4 and 5, we will describe the carrier idler device C used with the roller fall prevention fitting A attached, and the internal roller support member 8 that pivotally supports the first roller, the center roller 7, and the second rollers, the side rollers 7a, and houses and attaches the roller fall prevention fitting A.

[0047] Before explaining the carrier idler device C, we will first describe the structure of the center roller 7 and the side rollers 7a with reference to Figure 6. Since both rollers have the same structure, we will use the center roller 7 as an example for this explanation.

[0048] The center roller 7 has a hollow roller body 70 with a roughly cylindrical outer shape. A rotating shaft 72 is pivotally supported in the roller body 70 via a bearing (not shown) equipped with ball bearings, passing through end plates 71 on both sides in the longitudinal direction. As a result, both ends of the rotating shaft 72 protrude outward from the end plates 71 by a predetermined length.

[0049] Near both ends of the rotating shaft 72, there are two insertion grooves 73 formed in the diametrical direction, into which the shaft can be fitted into the respective receiving grooves 830, 830 of the support brackets 83, 83 without rotating relative to the support brackets 83, 83.

[0050] The center roller 7 is then mounted between the support brackets 83, 83 by fitting each of the insertion grooves 73 of the rotating shaft 72 into each of the receiving grooves 830, 830. In this state, the rotating shaft 72 does not rotate relative to the support brackets 83, 83, and only the roller body 70 rotates.

[0051] (Carrier idler device C) The carrier idler device C has a base frame 80 formed from angle material of a predetermined length, and outer roller support members 8a are erected near both ends of the base frame 80. On the inner surface of the upper part of each outer roller support member 8a, which is bent inward, there is a support bracket 81 (see Figure 4) having a receiving groove (not shown) that pivotally supports the outer end of the rotation shaft 72 of the side roller 7a.

[0052] Furthermore, two inner roller support members 8, whose column portions (not shown) have a roughly U-shaped cross-section, are erected at two locations near the center in the longitudinal direction of the base frame 80. Each inner roller support member 8 is shorter than the outer roller support member 8a, and an opening 84 is formed along its entire height by cutting out 1 / 4 of the side wall (see Figure 5(a)).

[0053] Each inner roller support member 8 is provided with a support bracket 83 having a receiving groove 830 that pivotally supports both ends of the rotation axis 72 of the center roller 7 (see Figure 5(b)). On the outer side of the upper part of the opening 84 of the column portion of each inner roller support member 8, a support bracket 82 having a receiving groove 820 that pivotally supports the inner end of the rotation axis 72 of the side roller 7a is provided, inclined at a predetermined angle.

[0054] The side rollers 7a are pivotally supported on the support brackets 81 and 82, tilting outward, while the center roller 7 is pivotally supported horizontally on one support bracket 83 and the other support bracket 83. The roller fall prevention fitting A of the present invention is installed between the respective support brackets 82 and 83 of each inner roller support member 8. The procedure for installing and removing the roller fall prevention fitting A will be described later.

[0055] The mounting structure of the roller fall prevention fitting A will be explained with reference to Figures 7 to 12. The roller fall prevention fitting A is installed in the space between support brackets 82 and 83, with the side rollers 7a pivotally supported on support brackets 81 and 82 at an outward upward inclination, and the center roller 7 pivotally supported horizontally on one support bracket 83 and the other support bracket 83.

[0056] The roller fall prevention fitting A is inserted into the inner roller support member 8 through the outer opening 84, and the latching hole 113 of the first latching member 11 is fitted onto the rotation shaft 72 of the center roller 7, which passes through the receiving groove 830 of the support bracket 83 (see Figures 9 and 11).

[0057] Furthermore, the latching hole 120 of the second latching member 12 is fitted onto the rotating shaft 72 of the side roller 7a, which passes through the receiving groove 820 of the support bracket 82 (see Figures 10 and 12). For convenience of illustration, the side roller 7a is omitted in Figure 11, and the center roller 7 is omitted in Figure 12.

[0058] Furthermore, the pressing bolt 6 of the roller fall prevention fitting A is tightened further from the state in which its tip is in contact with the pressing portion 130 of the operating lever 13. As a result, the first locking member 11 and the second locking member 12 are pushed in the direction of increasing angle, and the first locking member 11 is strongly pressed against the support bracket 83, and the second locking member 12 is strongly pressed against the support bracket 82, so that they are firmly attached in a braced manner (see Figures 7 and 8).

[0059] (action) The procedure for installing and removing the roller fall prevention fitting A according to the present invention will be explained, mainly with reference to Figures 7 to 12, and its operation will also be described.

[0060] (Installation procedure) [1] First, with the second latching member 12 of the roller fall prevention fitting A in the open position, rotate the second latching member 12 inward against the biasing force of the spring hinge 4 as shown in Figure 1, pass the operating lever 13 through the lever opening 114 of the first latching member 11, and maintain that position by placing your finger on the operating lever 13 as needed.

[0061] [2] Then, insert the roller fall prevention fitting A into the inner roller support member 8 through the outer opening 84, and fit the hooking hole 113 of the hooking plate 110 of the first hooking member 11 onto the rotating shaft 72 of the center roller 7 which passes through the receiving groove 830 of the support bracket 83 (see Figures 9 and 11).

[0062] [3] Next, while maintaining the hooked state of the hooking hole 113 of the hooking plate 110 with respect to the rotation axis 72 of the center roller 7, the hooking hole 120 of the second hooking member 12 is fitted onto the rotation axis 72 of the side roller 7a which passes through the receiving groove 820 of the support bracket 82, and the operating lever 13 is loosened to release the biasing force of the spring hinge 4 on the first hooking member 11 and the second hooking member 12 (see Figures 10 and 12). As a result, the biasing force of the spring hinge 4 acts on the first hooking member 11 and the second hooking member 12, and they are naturally temporarily fixed between the support brackets 82 and 83.

[0063] [4] Furthermore, the pressing bolt 6 of the roller fall prevention fitting A is tightened further from the state in which its tip is in contact with the pressing part 130 of the operating lever 13, and when it is tightened to an appropriate extent, the nut 3a is tightened to fix the pressing bolt 6 so that it does not loosen. At this time, the tip of the threaded part 60 of the pressing bolt 6 and the pressing part 130 are in strong contact, and the strength and toughness of the pressing part 130 also work effectively so that the first locking member 11 and the second locking member 12 are strongly pressed against the support bracket 83 and the support bracket 82 and firmly attached.

[0064] (Removal procedure) To remove the roller fall prevention fitting A, loosen the nut 3a, loosen and retract the press bolt 6, and operate the operating lever 13 to narrow the gap between the first locking member 11 and the second locking member 12. Then, by releasing the locking plate 110 and the second locking member 12 from their respective rotation axes 72 of the center roller 7 and side roller 7a, the roller fall prevention fitting A can be removed from the inner roller support member 8.

[0065] The operation of the roller fall prevention fitting A, which is installed as described above, is as follows: The roller fall prevention fitting A can hold the center roller 7, which is pivotally supported by the support brackets 83, 83, by fitting the latching plate 110 of the first latching member 11 onto the rotation shaft 72 of the center roller 7.

[0066] Furthermore, the second latching member 12 is rotatably connected to the first latching member 11 via a spring hinge 4 and is biased in the opening direction. As a result, in the normal state, the screw plate 112 and the second latching member 12 are stopped in a position where they are parallel in the rotation direction (see Figure 2(a)), and the first latching member and the second latching member can maintain a predetermined shape.

[0067] The roller fall prevention fitting A can then be held in place by fitting the hooking hole 120 of the second hooking member 12 onto the rotation axis 72 of the side roller 7a, which is pivotally supported by the support brackets 81 and 82. In this state, the roller fall prevention fitting A is attached between the support brackets 82 and 83 with a certain degree of tension due to the biasing force of the spring hinge 4.

[0068] Furthermore, the pressing bolt 6 is screwed onto the fixing bolt 3 of the screw plate 112 of the first latching member 11, and can be rotated to bring its tip into contact with the pressing portion 130, thereby pressing the second latching member 12 against the support bracket 82.

[0069] As a result, with the first locking member 11 as a fulcrum, the first locking member 11 and the second locking member 12 are pushed in the direction that increases their angle, and are pressed together more firmly. This makes the locking of each roller 7, 7a to the rotation axis 72 more secure, and prevents each roller 7, 7a from falling off.

[0070] Thus, according to the roller fall prevention fitting A of the present invention, the inner roller support member 8 is attached between support brackets 82 and 83 that form a predetermined angle with respect to each other, and the first locking member 11 and the second locking member 12 can be locked and held on the rotation axis 72 of the center roller 7 and side roller 7a that are pivotally supported by each support bracket 82 and 83.

[0071] This allows for simultaneous reinforcement and support of each roller 7, 7a with a single item, namely a single roller fall prevention fitting A, so that they do not fall off each support bracket 82, 83 even if they rattle or vibrate during operation. Furthermore, it provides a roller fall prevention fitting A that is easy to attach and detach from each support bracket 82, 83.

[0072] The roller fall prevention fitting A may be kept attached between the support brackets 82 and 83 at all times while the belt conveyor is in operation, or it may be attached only when looseness at the shaft supports of each roller 7 and 7a of the carrier idler device C of the belt conveyor or the fall of each roller 7 and 7a is anticipated.

[0073] The terms and expressions used in this specification and claims are for illustrative purposes only and are not limiting in any way, and there is no intention to exclude terms or expressions equivalent to the features and parts thereof described herein and in the claims. Furthermore, it goes without saying that various modifications are possible within the scope of the technical concept of the present invention. [Explanation of Symbols]

[0074] A Roller fall prevention fitting 1 Metal fitting body 11 First latching member 110 Locking plate 111 Connection Plate 112 Threaded Plate 113 Latch hole 114 Lever opening 115 bolt holes 12 Second latching member 120 Latch hole 13. Operating lever 130 Pressing part 131 Operation section 3. Fixing nut 3a Nut 4. Spring hinge 40 springs 6. Press bolt 60 Screw section C Carrier Idler Device 7 Center Roller 7 70 Roller body 71 End plate 72 Rotation axis 73 Inset groove 7a Side roller 8a Outer roller support member 81 Support bracket 82 Support bracket 820 Receiving groove 80 frame units 8. Internal roller support member 83 Support bracket 830 Receiving groove 84 Opening

Claims

1. A roller fall prevention fitting is installed between a first support bracket that pivotally supports a first roller and a second support bracket adjacent to the first support bracket, which pivotally supports a second roller that is positioned at a predetermined angle to the first roller, A first hooking member that hooks onto and holds the rotation axis of the first roller, which is pivotally supported by the first support bracket, A second latching member is rotatably connected to the first latching member and latches onto and holds the rotation axis of the second roller, which is pivotally supported by the second support bracket, A biasing member that biases the first latching member and the second latching member in a direction that moves them away from each other in the rotational direction, The device comprises a pressing member that, by screwing into the first locking member, directly or indirectly presses the second locking member against the second support bracket. Roller fall prevention fitting.

2. The second latching member is provided with an operating member that allows the second latching member to rotate and adjust the angle between the second latching member and the first latching member in the direction of rotation of the second latching member, The pressing member presses the operating member, indirectly pressing the second locking member against the second support bracket. A roller fall prevention fitting according to claim 1.

3. The base of the operating member is provided rising substantially vertically from a predetermined location on the second locking member, and in the state in which the first locking member is locked onto the rotation axis of the first roller and the second locking member is locked onto the rotation axis of the second roller, The rising direction of the base and the pressing direction of the pressing member are arranged to be at approximately a 90-degree angle. The roller fall prevention fitting according to claim 2.

4. The first latching member has a first latching hole formed for fitting onto and latching onto the rotating shaft of the first roller. The second latching member has a second latching hole formed therein for fitting onto and latching onto the rotating shaft of the second roller. A roller fall prevention fitting according to claim 1 or 2.

5. In the normal state where the biasing force of the biasing member is released, the angle between the outer surfaces of the first latching member and the second latching member is set to be greater than the angle between the first support bracket and the second support bracket. A roller fall prevention fitting according to claim 1 or 2.

6. The pressing member is screwed onto a screw plate provided at a predetermined angle on the first latching member. A roller fall prevention fitting according to claim 1 or 2.

7. The portion into which the aforementioned pressing member is screwed has a loosening prevention structure. A roller fall prevention fitting according to claim 1 or 2.

8. The first latching member is provided with a through-hole, the tip of the operating member can be inserted into the through-hole, and the member can be operated while inserted. The roller fall prevention fitting according to claim 2.

9. The first latching member is held by being latched onto the rotation axis of the first roller, which is pivotally supported horizontally. The second latching member is held by being latched onto the rotation axis of the second roller, which forms a predetermined vertical angle with the first roller. The roller fall prevention fitting according to claim 3.

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