Belt conveyor safety fence

Abstract

To provide a safety fence of a belt conveyor which can greatly improve workability of installation and prevents parts from being lost.SOLUTION: A fence panel 20 is held in an erected state by being attached to a pole 24, while a base plate is attached to the pole to protrude inward, a mounting bracket consists of a mounting plate 28 that is fastened to the base plate by mounting screws 27 so that the mounting position can be adjusted, and a receiving plate 30 continuous to the inner end of the mounting plate, a fitting groove is formed in the receiving plate, the tip of the lower side of a U-shaped conveyor frame 10 of the belt conveyor is fitted into the fitting groove, fastening screws 29 are pressed against the vertical sides of the U-shaped conveyor frame, and by mounting the mounting plate to the U-shaped conveyor frame with the fitting groove and the fastening screws, the fence panel is detachably mounted to the U-shaped conveyor frame.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] This invention relates to a safety fence for a belt conveyor, and more particularly to a safety fence that can greatly improve the ease of installation and prevents parts from being lost. [Background technology]

[0002] Belt conveyors are the lowest-cost transport devices and are widely used in various factories and facilities. However, if a worker accidentally comes into contact with or gets caught in moving parts such as the conveyor belt or carrier rollers while the belt conveyor is in operation, there is a concern that the worker may be injured or involved in an accident. Therefore, measures to prevent this are required.

[0003] Conventionally, a belt conveyor has been proposed in which a plurality of arc-shaped supports are attached to a conveyor frame at intervals, and a flexible sheet is supported by the arc-shaped supports to form a cover that completely covers the carrier side of the conveyor belt (Patent Document 1, Patent Document 2). With this type of belt conveyor, there is little risk that workers will come into contact with moving parts such as the conveyor belt, but maintenance requires that the sheet be lifted up each time, making the work complicated.

[0004] Also, a belt conveyor has been proposed in which a portal frame is fixed to the conveyor frame, the upper ends of left and right covers are hung from the center of the cross beam of the portal frame so as to be able to open and close freely, and the lower ends of the left and right covers are removably engaged with carrier stands that support carrier rollers, so that the left and right covers cover the entire carrier side of the conveyor belt (Patent Document 3).With this system, there is little risk of workers coming into contact with moving parts such as the conveyor belt, and further, maintenance is easy because it is only necessary to open the left or right cover upward.

[0005] On the other hand, the applicants of the present application have used a fence panel made by stretching a net or hanging rods on an outer frame, and an attachment bracket consisting of one part bent into an L-shape and the other part in a flat plate shape, with attachment bolts inserted into both sides of both parts and screwed into nuts, and have fitted the L-shaped part of one part into the conveyor frame, and have inserted attachment bolts into both sides of both parts and screwed into nuts to tighten them, thereby clamping the conveyor frame, and attaching the attachment bracket to the conveyor frame. The company has developed and proposed a safety fence for belt conveyors in which a mounting support for the fence panel is fixed to the outer part of the mounting bracket, a hook portion and a U-shaped locking ring are fixed to the mounting support and protrude out to the side, the upper end of the fence panel is hung by hooking it onto the hook portion, the locking ring is inserted into the gap between the mesh or bars in the center of the fence panel, and a cotter is inserted into the U-shape of the locking ring, and the cotter presses the mesh or bars of the fence panel against the mounting support (Patent Document 4).

[0006] With this type of safety fence, when attaching or detaching the fence panel, it is necessary to insert or remove the cotter into or from the U-shaped locking ring. This makes the attachment and detachment process cumbersome, and not only does it require improvements in workability, but it is also easy to lose track of the cotter unless it is tied with a string or something similar.

[0007] In response to this, the applicants of the present application have developed a safety fence for a belt conveyor in which a fence panel is installed by means of a mounting bracket on the side of a conveyor belt of a belt conveyor in which the conveyor belt is stretched endlessly by a conveyor frame. The fence panel is constructed by hanging a plurality of metal bars across an outer frame in the horizontal and / or vertical directions, while the mounting bracket has a mounting plate extending in the vertical or horizontal direction, and a plurality of fitting grooves are formed adjacent to each other in the vertical or horizontal direction in the mounting plate, and the starting ends of the groove bodies extending in the vertical or horizontal direction of the plurality of fitting grooves are aligned with the mounting bracket. The mounting bracket has an open shape at the front edge of the mounting plate, the plurality of fitting grooves have a groove width that allows the metal rod to fit into them, and at least two fitting grooves are formed offset in the front-to-rear direction of the mounting plate, the mounting bracket is attached to the conveyor frame, the metal rods are fitted into the fitting grooves and are clamped by the inner edges of the groove bodies of the at least two offset fitting grooves, and the fence panel is attached to the conveyor frame or carrier stand, thereby preventing parts from being lost (Patent Document 5). [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Utility Model Registration No. 3028206 [Patent Document 2] Japanese Patent Application Laid-Open No. 2007-076804 [Patent Document 3] Japanese Patent Application Publication No. 54-122578 [Patent Document 4] Patent No. 5172369 [Patent Document 5] Patent No. 6243242 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0009] In this situation, the objective of the present invention is to provide a safety fence for a belt conveyor that has a structure different from that of the above-mentioned Patent Document 5, which can significantly improve the ease of installation and removal, and also prevents parts from being lost. [Means for solving the problem]

[0010] Therefore, the safety fence for a belt conveyor according to the present invention is a safety fence for a belt conveyor in which a conveyor belt is stretched endlessly by a conveyor frame, and a fence panel is installed on the side of the conveyor belt by means of a mounting bracket. The fence panel is configured by hanging a plurality of metal rods across an outer frame in the horizontal and / or vertical directions, and the fence panel is held in an erected state by being attached to a support, and a base plate is attached to the support so as to protrude inward, while the attachment position of the mounting bracket to the base plate can be adjusted by means of an attachment screw. and a support plate continuous with the inner end of the mounting plate, wherein an insertion groove is formed in the support plate so as to open outward, and a fastening screw is provided so as to protrude into the conveyor, the tip of the lower side of the U-shaped conveyor frame of the belt conveyor is inserted into the insertion groove, and the fastening screw is pressed against the vertical side of the U-shaped conveyor frame, and the mounting plate is attached to the U-shaped conveyor frame by the insertion groove and the fastening screw, whereby the fence panel is detachably attached to the U-shaped conveyor frame.

[0011] Furthermore, the safety fence for a belt conveyor according to the present invention is a safety fence for a belt conveyor in which a conveyor belt is stretched endlessly by a conveyor frame, and a fence panel is installed by a mounting bracket on the side of the conveyor belt. The fence panel is constructed by hanging a plurality of metal rods horizontally and / or vertically on an outer frame, and the fence panel is held in an erected state by being attached to a support, and a base plate is attached to the support so as to protrude inward, while the mounting bracket comprises an attachment plate which is fastened to the base plate by a mounting screw so that the attachment position can be adjusted, and an inner end of the attachment plate. and a support plate continuous with the support plate, wherein a support step is formed in an intermediate portion of the support plate and fastening screws are provided toward the support step, while an insertion groove is formed at the inner end of the support plate and opens outward, and the tip of the lower side of the inverted L-shaped conveyor frame of the belt conveyor is inserted into the insertion groove, and the vertical side of the inverted L-shaped conveyor frame is received in the support step and the fastening screws are pressed against it, and the mounting plate is attached to the inverted L-shaped conveyor frame by the insertion groove and the fastening screws, whereby the fence panel is detachably attached to the inverted L-shaped conveyor frame.

[0012] One of the features of the present invention is that the fence panel is attached to a support post, a base plate is attached to the support post protruding inward toward the conveyor belt, a mounting bracket is attached to the base frame so that the mounting position can be adjusted, and the mounting bracket is attached to the conveyor frame using the fitting groove of the mounting bracket and the fastening screw, thereby allowing the fence panel to be detachably attached to the conveyor frame.

[0013] This allows the fence panel to be securely attached to the conveyor frame through the simple process of removably attaching the fence panel to the conveyor frame using the fitting grooves and fastening screws, and since there is no need to use a cotter like in the safety fence described in Patent Document 4, there is no risk of losing track of parts.

[0014] The number of fitting grooves may be one or more.

[0015] The fence panel can be constructed by hanging metal rods horizontally and / or vertically on an outer frame. The shape of the outer frame is not particularly limited, and can be rectangular as shown in the embodiment below, or any other shape such as a circle, ellipse, hexagon, or other polygon, or an animal. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a schematic side view showing a preferred embodiment of a safety fence for a belt conveyor according to the present invention. [Figure 2] FIG. 2 is a front view showing the embodiment. [Figure 3] A plan view showing the mounting structure of the fence panel in the above embodiment. [Figure 4] A side view showing the mounting structure of the fence panel in the above embodiment. [Figure 5] A diagram showing the state in which the fence panel is being installed in the above embodiment. [Figure 6] FIG. 10 is a front view showing the second embodiment. [Figure 7] A plan view showing the mounting structure of the fence panel in the above embodiment. [Figure 8] A side view showing the mounting structure of the fence panel in the above embodiment. [Figure 9] A diagram showing the state in which the fence panel is being installed in the above embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0017] The present invention will be described in detail below with reference to specific examples shown in the drawings. Figures 1 to 5 show a preferred embodiment of a safety fence for a belt conveyor according to the present invention. In the figures, a channel-shaped conveyor frame 10 extends longitudinally with its vertical sides facing outward. A drive roller and a driven roller are rotatably supported at both front and rear ends of the conveyor frame 10. A conveyor belt BC is stretched endlessly between the front and rear rollers, and the drive roller is driven by a drive motor (not shown) to run the conveyor belt BC.

[0018] A barrier panel 20 is provided on the side of the belt conveyor. The barrier panel 20 is made by hanging metal rods vertically and horizontally across a rectangular outer frame, and the lower part of the barrier panel 20 is attached to a support 24 with a cotter 21 and a ring 22, and the upper end of the barrier panel 20 is hooked onto a hook 25 at the upper end of the support 24.

[0019] Furthermore, a base plate 26 is fixed to the support 24 by welding or bolts and nuts so as to protrude into the conveyor, and a mounting bracket is attached to the base plate 26. The mounting bracket is equipped with a mounting plate 28, and oblong holes extending laterally are formed at the top and bottom in the mounting plate 28 and base plate 26, and bolts 27 are inserted into the upper and lower oblong holes and tightened with nuts, so that the mounting plate 28 is attached to the base plate 26 in an adjustable mounting position.

[0020] A U-shaped support plate 30 is attached to the inner end of the mounting plate 28, and a fitting groove 30A is formed on the upper edge of the support plate 30 and opens outward.Furthermore, fastening screws 29 are attached to the vertical edge of the support plate 30 at intervals on the left and right, protruding inward toward the inside of the conveyor.

[0021] The tip of the lower side of the U-shaped conveyor frame 10 of the belt conveyor is fitted into the fitting groove 30A of the support plate 30, and fastening screws 29 are pressed against the vertical side of the U-shaped conveyor frame 10. The mounting plate 28 is attached to the U-shaped conveyor frame 10 by the fitting groove 30A and the fastening screws 29, and the fence panel 20 is detachably attached to the U-shaped conveyor frame 10.

[0022] When setting the fence panel 20 on the belt conveyor, the base plate 26 is attached to the mounting plate 28 of the mounting bracket by adjusting its position with bolts and nuts 27, and the fence panel 20, held in an erect position by the supports 24, is attached to the mounting bracket.

[0023] Next, the fastening screws 29 are loosened, the fence panel 20 is lifted, and the fitting groove 30A of the receiving plate 30 of the mounting bracket is fitted into the tip of the lower edge of the U-shaped conveyor frame 10 of the belt conveyor. The fastening screws 29 are then tightened to press the fastening screws 29 against the vertical edge of the U-shaped conveyor frame 10, and the mounting bracket is attached to the U-shaped conveyor frame 10 of the belt conveyor. This attaches and holds the fence panel 20 to the U-shaped conveyor frame 10, allowing the fence panel 20 to be attached to the side of the belt conveyor.

[0024] 6 to 9 show a second embodiment, in which the same reference numerals as in Fig. 1 to 5 indicate the same or corresponding parts. In this example, the channel-shaped vertical sides of the conveyor frame 10 are arranged facing inward, a U-shaped support bracket 32 ​​opens outward and is fixed to a support plate 30 of the mounting bracket by welding or bolts and nuts, the channel-shaped lower side of the conveyor frame 10 is sandwiched between the support bracket 32 ​​of the mounting bracket and fixed with the fastening screws 32, and the channel-shaped vertical sides of the conveyor frame 10 abut against the support step 31 of the support plate 30 and are pressed and fixed by the fastening screws 29, and the mounting plate 28 is attached to the channel-shaped conveyor frame 10, whereby the fence panel 20 is detachably attached to the channel-shaped conveyor frame 10.

[0025] When setting the fence panel 20 on the belt conveyor, the fence panel 20, which is held in an erect state by the support posts 24, is attached to the mounting bracket. Next, the fastening screws 29 and 33 are loosened, the fence panel 20 is lifted, the fitting groove of the receiving bracket 32 ​​of the receiving plate 30 of the mounting bracket is fitted into the tip of the lower side of the U-shaped conveyor frame 10 of the belt conveyor, the fastening screws 33 are tightened, and the fastening screws 29 are tightened to press the fastening screws 29 against the vertical side of the channel-shaped conveyor frame 10, and the mounting bracket is attached to the channel-shaped conveyor frame 10 of the belt conveyor, thereby attaching and holding the fence panel 20 to the channel-shaped conveyor frame 10, and the fence panel 20 can be attached to the side of the belt conveyor. [Explanation of symbols]

[0026] 10 Conveyor Frame 20 Fence Panels 24 Posts 26 Base Plate 28 Mounting plate 29 Fastening screws 30 Support plate 31 Support step 32 Receiving bracket 33 Fastening screws

Claims

[Claim 1] In a safety fence for a belt conveyor, in which a conveyor belt is stretched endlessly by a conveyor frame, a fence panel is installed on the side of the conveyor belt by a mounting bracket, The fence panel is constructed by hanging a plurality of metal rods horizontally and / or vertically on an outer frame, and the fence panel is held in an erected state by being attached to a support pole, and a base plate is attached to the support pole so as to protrude inward, the mounting bracket is comprised of a mounting plate fastened to the base plate by mounting screws so that the mounting position can be adjusted, and a receiving plate continuous with the inner end of the mounting plate; The receiving plate has an insertion groove formed therein and opening outward, and a fastening screw is provided therein and protruding toward the inside of the conveyor, and the tip of the lower side of the U-shaped conveyor frame of the belt conveyor is inserted into the insertion groove, The fastening screws are pressed against the vertical sides of the U-shaped conveyor frame, and the mounting plate is attached to the U-shaped conveyor frame by the fitting grooves and fastening screws, thereby detachably attaching the fence panel to the U-shaped conveyor frame.

Images