Grizzly Feeder

Abstract

To provide a grizzly feeder which has enhanced efficiency of maintenance work in replacement with a simple configuration.SOLUTION: A grizzly feeder which has a plurality of grizzly bars arranged at a predetermined interval, receives and screens a crushed material such as rock on one end side on the grizzly bar and then conveys the screened material from the other end side includes: a base part for forming, fixing and supplying a basis part of the grizzly bar; and a bar part which is formed of a bar body formed of a long plate material, has the bar body detachably arranged on an upper face part of the base part, and conveys the crushed material on the upper face part.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a Grizzly Feeder that screens and transports crushed materials such as rocks supplied thereto, and in particular to a Grizzly Feeder that has improved maintainability when replacing the feeder. [Background technology]

[0002] It is necessary to create aggregates of crushed stone with uniform particle size for applications such as rebar materials. Grizzly feeders are currently commonly used as equipment for sieving and transporting crushed materials such as rocks in such a crushing process.

[0003] The Grizzly Feeder is composed of multiple Grizzly bars that are arranged at a predetermined interval and are parallel to each other, and crushed materials such as rocks that are put into a hopper are received from the hopper and sieved on the Grizzly bars. By applying vibration to the Grizzly bars, the crushed materials pass through the gaps between the Grizzly bars and are classified and sieved.

[0004] The Grizzly Feeder automates screening and enables easy and highly accurate separation, thereby improving the work efficiency of soil processing processes such as crushing. As a result, it has become an indispensable device, especially for self-propelled jaw crushers, which have become mainstream in recent years.

[0005] However, when the Grizzly Feeder is used for a long period of time, the adhesion of crushed materials such as rocks and stones to the Grizzly Bar accumulates, forming a deposit. The deposit is generally sticky, so it sticks very firmly to the Grizzly Bar. As the deposit accumulates, it causes the Grizzly Feeder to become clogged, leading to a decrease in the classification efficiency of the Grizzly Feeder for crushed materials such as rocks.

[0006] In addition, since the crushed material itself is a construction material and is heavy, the grizzly bar can be damaged if it continues to be subjected to impact from the falling crushed material for a long period of time.

[0007] For these reasons, Grizzly Feeders require replacement when changing the mesh size of the Grizzly bars or as part of regular maintenance. However, the Grizzly bars are heavy and the task of replacing them is not easy, both in terms of transportation and replacement, making maintenance an issue.

[0008] When using the Grizzly Feeder for a long period of time, improving the ease of maintenance to prevent adhesion of such solid materials and damage is an important issue.

[0009] To solve such problems, a conventional Grizzly Feeder includes, for example, a trough for receiving the material to be treated and a Grizzly Deck for receiving the material from the trough, and the Grizzly Deck is configured by arranging multiple Grizzly Bars in parallel, in which the base ends of the Grizzly Bars are fixed to the main body of the Grizzly Feeder via an elastic body and the tip ends of the Grizzly Bars are left free (see Patent Document 1).

[0010] In addition, a conventional grizzly feeder has a pair of front and rear cross bars that support both ends of multiple grizzly bars, and has rectangular notches on the upper side at equal intervals in the longitudinal direction, and a pair of grizzly bars, each of which has a rectangular cross-sectional shape and differs only in thickness, are tightly attached to each other and both ends are stored and fixed within the notches, thereby making it easy to change the slit gap of the grizzly bars (see Patent Document 2).

[0011] Furthermore, a conventional grizzly feeder has a configuration in which a number of grizzly bars are placed in parallel on a horizontal bar suspended within a feeder trough, and compression coil springs of the same specifications, having the same natural length and spring constant, are elastically loaded between each of the grizzly bars through spring guide rods, and a pressing means for the compression coil springs is provided, thereby making it possible to easily change the slit gaps of the grizzly bars (see Patent Document 3). [Prior art documents] [Patent documents]

[0012] [Patent Document 1] JP 2011-62606 A [Patent Document 2] Japanese Patent Application Publication No. 10-71366 [Patent Document 3] Japanese Patent Application Publication No. 10-71342 Summary of the Invention [Problem to be solved by the invention]

[0013] However, when additional components such as an elastic body, a cross bar, or a compression coil spring are used as in Patent Documents 1 to 3, the device becomes more complex and it becomes necessary to attach and detach such additional components from the outside. This increases the number of steps required to attach the additional components and the number of steps required for maintaining the additional components themselves, resulting in a problem of making the work more complicated.

[0014] The present invention has been made to solve the above-mentioned problems, and aims to provide a Grizzly Feeder that has a simple configuration and improves the efficiency of maintenance work at the time of replacement. [Means for solving the problem]

[0015] The Grizzly Feeder disclosed in the present application comprises a plurality of Grizzly bars arranged at predetermined intervals, which receive crushed material such as rocks on one end of the Grizzly bars, sift them, and transport them from the other end, and comprises a base portion which forms the base of the Grizzly bars and fixes and supports them, and a bar portion which is formed of a bar body made of a long plate material, which is detachably arranged on the upper surface of the base portion and transports the crushed material on the upper surface.

[0016] In this way, the Grizzly Feeder disclosed in the present application comprises a base portion that forms and fixes and supports the base portion of the Grizzly bar, and a bar portion formed of a bar body made of a long plate material, which is removably arranged on the upper surface portion of the base portion and transports the crushed material on the upper surface portion.Since the bar portion, which receives direct impact from the crushed material and accumulates wear, is detachable, replacement of the Grizzly bar can be completed by replacing only the bar portion, and maintenance work when it is time to replace the bar due to wear can be carried out at low cost and extremely simply.

[0017] The Grizzly Feeder disclosed in the present application is one in which the bar portion is formed of convex portions protruding from the lower surface of both sides of the bar body in opposing relation to each other, and includes an intermediate fitting portion that sandwiches and fits the base portion with each of the convex portions, and a screw portion that screws into and fixes the upper surface of the base portion at one or more positions. In this way, the Grizzly Feeder disclosed in the present application is one in which the bar portion is formed of convex portions protruding from the lower surface of both sides of the bar body in opposing relation to each other, and includes an intermediate fitting portion that sandwiches and fits the base portion with each of the convex portions, and a screw portion that screws into and fixes the upper surface of the base portion at one or more positions. This makes it possible to more firmly integrate the bar portion and the base portion, and to accurately and easily position the bar portion and the base portion, and to suppress lateral vibrations generated by the Grizzly Bar.

[0018] The Grizzly Feeder disclosed in the present application is provided with a terminal fitting portion that is formed in a protruding shape at the end of the one end side and / or the other end side of the base portion as necessary, and that fits with the one end side and / or the other end side of the base portion. In this manner, the Grizzly Feeder disclosed in the present application is provided with a terminal fitting portion that is formed in a protruding shape at the end of the one end side and / or the other end side of the bar portion and that fits with the one end side and / or the other end side of the base portion, so that the bar portion and the base portion are more firmly integrated, and the positioning of the bar portion and the base portion can be performed accurately and easily, and vertical vibrations generated in the Grizzly bar can be suppressed.

[0019] In the Grizzly Feeder disclosed in the present application, the long plate material constituting the bar body is formed from a rod-shaped body having at least an arc-shaped upper cross section, as necessary. In this way, since the long plate material constituting the bar body is formed from a rod-shaped body having at least an arc-shaped upper cross section, the contact between the crushed material and the bar body becomes point contact, reducing the contact area, thereby reducing the frequency with which the crushed material gets caught on the bar body and suppressing clogging of the crushed material in the bar body.

[0020] The Grizzly Feeder disclosed in the present application is one in which the bar portion is provided with a raised portion shaped to rise toward the other end side and / or both ends in the short side direction, as necessary. In this way, the Grizzly Feeder disclosed in the present application is one in which the bar portion is provided with a raised portion shaped to rise toward the other end side and / or both ends in the short side direction, and the raised portion suppresses wear on the other end side of the bar portion, which is susceptible to strong impacts from crushed materials such as rocks, thereby suppressing wear due to wear over time, making it possible to extend the replacement period for the Grizzly Bar members, and making it possible to carry out maintenance work at the time of replacement due to wear at low cost and in an extremely simple manner.

[0021] In the Grizzly Feeder disclosed in the present application, the bar portion is coated with a resin material on the joint surface of the base portion as necessary. In this manner, in the Grizzly Feeder disclosed in the present application, the bar portion is coated with a resin material on the joint surface of the base portion, and therefore the resin coating prevents rattling caused by vibration of the bar portion, maintaining the accuracy of sieving crushed materials such as rocks on the Grizzly Bar, while preventing deterioration of the connecting members of the Grizzly Bar and extending the replacement period, thereby further improving maintainability.

[0022] In the Grizzly Feeder disclosed in the present application, the bar portion has a higher hardness than the base portion as necessary. In this manner, in the Grizzly Feeder disclosed in the present application, the bar portion has a higher hardness than the base portion, so that the bar portion can withstand impacts from crushed materials such as rocks with a high hardness, and the base portion has a low hardness, so that the weight of the device as a whole can be reduced, thereby suppressing wear and making it easier to move, transport, and install the device.

[0023] The Grizzly Feeder disclosed in the present application is such that, as necessary, the upper surface of the base portion is composed of one or more individual flat base portions whose height is reduced by steps along the longitudinal direction, and the bar portion is composed of one or more individual bar portions detachably disposed on each of the individual base portions. In this way, the Grizzly Feeder disclosed in the present application is such that the upper surface of the base portion is composed of one or more individual flat base portions whose height is reduced by steps along the longitudinal direction, and the bar portion is composed of one or more individual bar portions detachably disposed on each of the individual base portions, so that crushed materials such as rocks are classified with the addition of a falling action due to the steps between the individual bar portions, and the materials are sieved with higher accuracy, thereby realizing high accuracy of the device. [Brief description of the drawings]

[0024] [Figure 1]FIG. 1 shows a configuration diagram of a Grizzly feeder according to a first embodiment of the present invention. [Diagram 2] FIG. 1 shows a configuration diagram of a Grizzly feeder according to a first embodiment of the present invention. [Diagram 3] FIG. 1 shows a configuration diagram of a Grizzly feeder according to a first embodiment of the present invention. [Figure 4] FIG. 1 shows a configuration diagram of a Grizzly feeder according to a first embodiment of the present invention. [Diagram 5] FIG. 1 shows a configuration diagram of a Grizzly feeder according to a first embodiment of the present invention. [Figure 6] 1 shows a perspective view of a Grizzly feeder according to a first embodiment of the present invention. FIG. [Figure 7] FIG. 2 is an explanatory diagram of a vibration mechanism of the Grizzly feeder according to the first embodiment of the present invention. [Figure 8] FIG. 13 shows a configuration diagram of an end fitting portion of a grizzly feeder according to a second embodiment of the present invention. [Figure 9] 1A and 1B show front, side and top views of a grizzly bar of a grizzly feeder according to a second embodiment of the present invention. [Figure 10] FIG. 13 shows a configuration diagram of an end fitting portion of a grizzly feeder according to a second embodiment of the present invention. [Figure 11] FIG. 13 shows a configuration diagram of a raised portion of a grizzly feeder according to a third embodiment of the present invention. [Figure 12] FIG. 13 shows a configuration diagram of a Grizzly feeder according to a fourth embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] (First embodiment) As shown in Figure 1, the Grizzly Feeder of the first embodiment has multiple Grizzly bars arranged at predetermined intervals, and receives crushed material 100 such as rocks on the Grizzly bars at one end side (the side where the crushed material 100 is supplied, the X side in the figure), sieves it, and transports it from the other end side (the side where the crushed material 100 is transported, the Y side in the figure).The Grizzly Feeder is configured to include a base portion 1 that forms the base portion of the Grizzly bar and fixes and supports it, and a bar portion 2 that is formed of a bar body 2a made of a long plate material, which is removably arranged on the upper surface of the base portion 1 and transports the crushed material 100 on this upper surface portion.

[0026] The material 100 to be crushed is not particularly limited as long as it is a material that can be crushed by a jaw crusher, but may be, for example, concrete waste, crushed stone, coal, etc.

[0027] As shown in FIG. 2, the bar portion 2 is made up of a plurality of flat grizzly bars arranged parallel to each other at predetermined intervals, and is disposed on the upper surface of the base portion 1 .

[0028] The method of fixing the base portion 1 and the bar portion 2 is not particularly limited, but as shown in Figure 3(a), the bar portion 2 can be configured to be formed with convex portions protruding oppositely from the underside of both sides of the bar main body 2a, and to include an intermediate fitting portion 21 that clamps and fits the base portion 1 with each of the convex portions, and a screw portion 22 that screw-fits and fixes the upper surface portion of the base portion 1 at one or more positions.

[0029] This intermediate fitting portion 21 is preferably disposed at a position near the middle of the bar portion 2, as shown in FIG. 3(b). By firmly clamping both sides of the base portion 1 near the middle, the center of gravity near the middle of the base portion 1 is stably maintained, and a sturdy fixation is formed that is also resistant to left-right vibrations of the base portion 1, and can function to prevent left-right displacement.

[0030] The screw-fitting portion 22 is not particularly limited, but as shown in FIG. 3(c), it is composed of a screw 22a and a groove 22b into which the screw 22a is screwed. The screw 22a is screwed into the groove 22b, and the base portion 1 and the bar portion 2 are connected to each other by the screw 22a being screwed into the groove 22b. As shown in Figures 1 and 3, the work can be done only in the vertical direction. fixed of As the screw 22a, for example, a bolt can be used.

[0031] As shown in FIG. 3(c), the base portion 1 is provided with a notch 11 that is cut out in order to provide the screw-fitting portion 22 (for example, to provide a space for installing a mounting bolt).

[0032] The screw portion 22 is screwed and fixed at one or more positions on the upper surface of the base portion 1. More preferably, it is screwed and fixed at multiple positions on the upper surface of the base portion 1. For example, it can be screwed at three points near both end faces and near the middle position, and such multiple fixing points maintain the connection with the base portion 1 more stably and form a strong fixation against vibration.

[0033] In this way, by providing the intermediate fitting portion 21 and the screw-threaded portion 22, the bar portion 2 and the base portion 1 are more firmly integrated, making it possible to accurately and easily position the bar portion 2 and the base portion 1 and to suppress lateral vibrations generated in the grizzly bar.

[0034] Thus, the Grizzly Feeder of this embodiment comprises a base portion 1 which forms the base portion of the Grizzly bar and fixes and supports it, and a bar portion 2 which is formed of a bar body 2a made of a long plate material, which is removably arranged on the upper surface of the base portion 1 and which transports the crushed material 100 on its upper surface.Since the bar portion 2 which receives direct impact from the crushed material 100 and accumulates wear can be easily attached and detached, replacement of the Grizzly bar can be completed by replacing only the bar portion 2, and maintenance work when it is time to replace the bar due to wear can be carried out at low cost and in an extremely simple manner.

[0035] In the above description, the upper surface of the base portion 1 is formed in a planar shape with one step, but the present invention is not limited to this configuration, and the upper surface of the base portion 1 may have a multi-step structure.

[0036] For example, as shown in Figure 4(a), the upper surface of the base portion 1 may be composed of a plurality of individual base portions 1A, 1B whose height decreases step by step along the longitudinal direction from one end side (the side where the crushed material 100 is supplied, the X side in the figure) to the other end side (the side where the crushed material 100 is transported, the Y side in the figure), and as shown in Figure 4(b), the bar portion 2 may be composed of a plurality of individual bar portions 2A, 2B which are detachably arranged on each of the individual base portions 1A, 1B.

[0037] Furthermore, the bar body 2a of the grizzly feeder in this embodiment is not particularly limited as long as it is a rod-shaped or flat bar shape, but more preferably, the long plate material constituting this bar body 2a is formed from a rod-shaped body having at least an arc-shaped upper cross section.

[0038] The rod-shaped body having at least an arc-shaped upper cross section constituting the bar body 2a can be configured so that not only the upper cross section but also the lower cross section is arc-shaped (i.e., the cross section is circular). Such a rod-shaped body can be formed in a cylindrical shape with a constant diameter in the longitudinal direction, or in a conical shape tapering toward the other end (the side for transporting the crushed material 100).

[0039] In addition, the rod-shaped body constituting the bar main body 2a can be configured so that only the upper cross section is arc-shaped as described above, and the lower cross section is linear (i.e., the bottom surface is flat), and it can also be configured, for example, as a semi-cylinder or semi-cone shape.

[0040] For example, as shown in Fig. 5(a) and its front view Fig. 5(b), the rod-shaped body constituting the bar main body 2a has an upper cross section formed as an arc on the one end side (the side where the crushed material 100 is supplied, the X side in the figure) and a gradually tapered (reduced diameter) arc shape toward the other end side (the side where the crushed material 100 is transported, the Y side in the figure), and the tip of the other end side is formed as an arc shape with a smaller diameter than the upper cross section of the one end side, and the lower cross section can be formed as a semi-cone shape that is linear (i.e., the bottom surface of the lower surface is flat) from the one end side to the other end side. In addition, the tip of the other end side can be configured as the apex of the semi-cone shape.

[0041] In addition, the bar body 2a can be formed as a rod-shaped body (e.g., a cylindrical, conical, semi-cylindrical, or semi-conical) with at least an upper cross section of all the individual bar parts 2A and 2B described above, but in addition to this, some of the individual bar parts 2A and 2B (e.g., only the individual bar part 2A or only the individual bar part 2B) can be formed as a rod-shaped body with at least an upper cross section of an arc. In this way, the shape of the bar body 2a can be freely designed according to the application. For example, only the individual bar part 2B on the other end side (the side that conveys the crushed material 100, the Y side in the figure), which is susceptible to impact from the crushed material 100 and wears easily, can be formed as a semi-conical shape with an upper cross section formed as an arc.

[0042] In addition, when a rod-shaped body (e.g., a cylindrical, conical, semi-cylindrical, or semi-conical shape) having at least an arc-shaped upper cross section that constitutes this bar main body 2a is screwed to the screw engagement portion 22, a cover can be provided to cover the space of the recess created in the rod-shaped body by the screw fixation, thereby smoothing the surface of the rod-shaped body and further reducing the contact area with the crushed material 100, thereby suppressing the impact from the crushed material 100 and improving durability.

[0043] In this way, since the long plate material constituting the bar body 2a is formed from a rod-shaped body (e.g., cylindrical, conical, semi-cylindrical, or semi-conical) with at least an upper cross-section that is arc-shaped, the contact between the crushed material and the bar body 2a is point contact (rather than surface contact) and the contact area is reduced, which reduces the frequency with which the crushed material 100 gets caught on the bar body 2a and effectively suppresses clogging of the bar body 2a with the crushed material 100 and damage to the bar body 2a from the crushed material 100.

[0044] As described above, as shown in FIG. 6, the device is composed of individual bar sections 2A, 2B which are detachably arranged on the individual base sections 1A, 1B, respectively. Therefore, the crushed material 100 such as rocks is classified by the addition of a falling action due to the step between the individual bar sections 2A, 2B, and is screened with higher accuracy, thereby realizing high accuracy of the device.

[0045] In the above, the individual base portions 1A, 1B and the individual bar portions 2A, 2B are shown to have a horizontally flat shape, but they can also be made to have an inclined slope, for example, the height of which decreases toward the other end (the side that transports the crushed material 100, the Y side in the figure).In this case, the crushed material 100 can slide down the slope by utilizing the action of gravity, thereby making it possible to transport the crushed material 100 more smoothly.

[0046] In addition, in the above, the individual base portions 1A, 1B and individual bar portions 2A, 2B are configured in a two-stage configuration with a step, but this is not limited to this configuration and it is also possible for them to be configured in three or more stages with a step (individual base portions 1A, 1B, 1C, 1D, etc., 1B individual bar portions 2A, 2B, 2C, 2D, etc.).

[0047] Furthermore, as a mechanical vibrating feeder, the Grizzly Feeder can be equipped with a mechanism for generating vibrations. For example, as shown in FIG. 7, a motor unit 300 can be disposed on the side wall portion 200 of the Grizzly Feeder, and the base portion 1 can be easily and freely vibrated by this motor unit 300.

[0048] Second Embodiment The Grizzly Feeder of the second embodiment, like the first embodiment, comprises the base portion 1 and the bar portion 2, and further comprises, as shown in Figure 8, a terminal fitting portion 23 formed in a protrusion shape at the end of the one end side (the side to which the crushed material 100 is supplied) and / or the other end side (the side to which the crushed material 100 is transported) of the bar portion 2, which fits into the one end side and / or the other end side of the base portion 1.

[0049] As shown in the top view of the Grizzly bar shown in Fig. 9(a), the side view of the Grizzly bar shown in Fig. 9(b), and the front view of the Grizzly bar shown in Fig. 9(b), the intermediate fitting portion 21 is disposed near the middle position of the bar portion 2, thereby preventing left-right displacement caused by vibration, and the end fitting portion 23 is disposed at the end of the bar portion 2, thereby enabling positioning of the bar portion 2 in the front-rear direction as a stopper. In this way, strong fixation is achieved in each of the front-rear and left-right directions, allowing for accurate positioning and vibration suppression with high stability over a long period of time.

[0050] The end fitting 23 may be disposed on the one end side (the side to which the crushed material 100 is supplied) or on the other end side (the side to which the crushed material 100 is transported). When disposed on the one end side, the Grizzly bar is disposed on the side that is susceptible to impact from the crushed material 100 falling, so that vibration in the longitudinal direction (vertical direction) is suppressed, improving impact resistance and enabling accurate positioning in the longitudinal direction with high stability. When disposed on the other end side, the Grizzly bar is disposed on the side that is susceptible to wear due to stress from repeated bending from the crushed material 100, so that the Grizzly bar in a position that is susceptible to aging due to wear is stably fixed, enabling accurate positioning in the longitudinal direction with high stability over a long period of time.

[0051] 10, the end fitting portion 23 can be configured at both ends of the one end side and the other end side of the bar portion 2. With this configuration, both ends of the base portion 1 are sandwiched at the same time, and the base portion 1 and the bar portion 2 can be fitted together more firmly.

[0052] In addition, the end fitting portion 23 can have various shapes, for example, a bent U-shape. With this configuration, the end fitting portion 23 simultaneously holds two different surfaces, the side surface and the bottom surface, of the end of the base portion 1, and the base portion 1 and the bar portion 2 can be fitted together more firmly.

[0053] In this way, the terminal fitting portion 23 more firmly integrates the bar portion 2 and the base portion 1, allowing the bar portion 2 and the base portion 1 to be positioned accurately and easily, and also making it possible to suppress vertical vibrations generated in the grizzly bar.

[0054] (Third embodiment) The Grizzly Feeder of the third embodiment, like the first embodiment, comprises the base portion 1 and the bar portion 2, and further comprises a raised portion 24, as shown in Figure 11(a), in which the bar portion 2 is provided with a raised portion 24 that is shaped to rise from the one end side (the side where the crushed material 100 is supplied, the X side in the figure) toward the other end side (the side where the crushed material 100 is transported, the Y side in the figure).

[0055] 11(a) and (b), the raised portion 24 can be formed so that the bar portion 2 gradually increases in thickness toward the other end side in the longitudinal direction (the side for transporting the crushed material 100, the Y side in the figure) and rises to a height L at the end of the other end side. The length of this height L is not particularly limited, but can be 1.1 to 2 times, more preferably 1.3 to 1.7 times, and even more preferably 1.4 to 1.6 times, the height of one end side of the bar portion 2, making it possible to achieve both transportability and abrasion resistance.

[0056] In addition, as shown in Figure 11 (c), this raised portion 24 can also have a shape in which the left and right ends in the longitudinal cross section are raised higher than the center so that the thickness of the bar portion 2 gradually increases toward both ends in the short side direction.

[0057] As described above, it is also possible for the thickness to gradually increase toward both the other end in the longitudinal direction and toward both ends in the short side direction, and it is also possible for the thickness to gradually increase toward either the other end in the longitudinal direction or toward both ends in the short side direction.

[0058] This shape creates thickness on both ends of the bar body 2a, which is particularly susceptible to impact from the crushed material 100 and prone to wear, making it possible to suppress the progression of deterioration due to wear.In addition, because the shape is less susceptible to deterioration, the bar body 2a can be easily stacked when replacing it, improving transportability.

[0059] The raised portion 24 may be formed from the same material as the bar portion 2, or may be formed from a material different from that of the bar portion 2.

[0060] Furthermore, this raised portion 24 is not limited to having a shape that gradually and smoothly increases in thickness as described above, but it is also possible for the thickness to increase by providing a step at the end side of the other end, making it possible to achieve both portability and abrasion resistance in the same manner as described above.

[0061] In this way, the Grizzly Feeder of this embodiment has a bar portion 2 equipped with a raised portion 24 that is shaped to rise toward the other end side and / or both ends in the short side direction, and this raised portion 24 suppresses wear on the other end side and / or both ends in the short side direction of the bar portion 2, which are susceptible to strong impacts over time from the crushed material 100 such as rocks. This suppresses wear due to wear over time, extends the replacement period for the Grizzly bar components, and allows maintenance work at the time of replacement due to wear to be carried out at low cost and in an extremely simple manner.

[0062] (Fourth embodiment) The Grizzly Feeder of the fourth embodiment, as shown in Figures 12(a) and (b), comprises the base portion 1 and the bar portion 2, similar to the first embodiment, and further, as shown in Figure 12(c), the bar portion 2 has a resin material 21a coated on the joining surface of the base portion 1.

[0063] The resin material 21a is not particularly limited, but examples thereof include polyurea resin, polyurethane resin, acrylic resin, polyester resin, polyether resin, polyamide resin, polyimide resin, etc., but it is preferable to use polyurea resin because it has excellent strength, abrasion resistance, corrosion resistance, and coating film extensibility as a lining material, and commercially available polyurea resins can be used, such as Kemco 189 (manufactured by Cement Works Co., Ltd.) polyurea resin.

[0064] This resin material 21a covers the surface (i.e., the inner surface) that fits with the base part 1. This resin material 21a can cover only a part of this joining surface (for example, the intermediate fitting part 21), or it can cover the entire joining surface. This covering resin material 21a buffers friction and impact that occurs in the bar part 2 at the fitting position with the base part 1 where friction is likely to occur.

[0065] In this way, since the joint surface of the bar portion 2 and the base portion 1 are coated with resin material 21a, the rattling caused by the vibration of the bar portion 2 is prevented by the resin coating, and the accuracy of screening the crushed material 100 such as rocks on the Grizzly bar is maintained, and deterioration of the connecting members of the Grizzly bar can be prevented to extend the replacement period, further improving maintainability.

[0066] Fifth embodiment The Grizzly Feeder according to the fifth embodiment comprises the base portion 1 and the bar portion 2, similar to the first embodiment, and furthermore, the bar portion 2 has a harderness than the base portion 1.

[0067] Hardness standards can be determined using index values ​​based on various standardized tests such as Brinell hardness (HB, HBW), Vickers hardness (HV), and Knoop hardness.

[0068] For example, the base portion 1 may be made of a relatively light and soft material such as an aluminum alloy or resin, while the bar portion 2 may be made of a relatively hard material such as a cemented carbide or stainless steel alloy.

[0069] Examples of resin that can be used to form the base portion 1 include thermoplastic resin and plastics such as thermoplastic resin.

[0070] As the cemented carbide that can be used to form the bar portion 2, for example, a mixture of tungsten carbide (WC) and cobalt (Co) and sintered can be used. The cemented carbide has extremely high hardness and is less prone to loss of hardness, so that the bar portion 2 can exhibit excellent wear resistance.

[0071] In this way, since the bar portion 2 is harder than the base portion 1, the bar portion 2 can withstand the impact from the crushing material 100 such as rocks with a high degree of hardness, while the base portion 1 has a low hardness and is therefore lighter in weight, thereby reducing wear and making it easier to move and transport the device. [Explanation of symbols]

[0072] 1 Base 1A Individual base unit 1B Individual base part 11 Notch 2 Bar section 2A Individual bar section 2B Individual bar section 2a Bar body 21 Intermediate fitting part 21a Resin material 22 Threaded joint 22a Screw 22b Groove 23 End fitting 24 Ridge 100 Crushed materials 200 Side wall 300 Motor section

Claims

1. In a Grizzly Feeder, a plurality of Grizzly bars are arranged at predetermined intervals, and crushed materials such as rocks are received at one end of the Grizzly bars, sieved, and conveyed from the other end. A base portion that forms a base portion of the grizzly bar and fixes and supports the bar; a bar portion formed of a bar body made of a long plate material, the bar body being detachably disposed on an upper surface of the base portion, and the bar portion transports the material to be crushed on the upper surface; Equipped with The bar body is an intermediate fitting portion formed of a pair of protruding portions protruding from opposite sides of the lower surface of the bar body, disposed at a position near the middle of the bar body, and fitted to the base portion by sandwiching the pair of protruding portions; A screw-fitting portion is formed as a groove penetrating from the upper surface to the lower surface of the bar body at least in the middle of the bar body corresponding to the intermediate fitting portion, and the groove is fixed to the upper surface of the base portion by screwing a screw at one or more positions; The present invention is characterized by the following features: Grizzly feeder.

2. 2. The grizzly feeder of claim 1, The bar portion is formed in a protruding shape at the end of the one end side and / or the other end side, and is provided with an end fitting portion that fits with the one end side and / or the other end side of the base portion. Grizzly feeder.

3. The Grizzly feeder according to claim 1 or 2, The long plate material constituting the bar body is formed from a rod-shaped body having at least an upper cross section in an arc shape. Grizzly feeder.

4. In the Grizzly feeder according to any one of claims 1 to 3, The bar portion is characterized in that it has a raised portion that is raised toward the other end side and / or both ends in the short side direction. Grizzly feeder.

5. The Grizzly feeder according to any one of claims 1 to 4, The bar portion is characterized in that the joint surface of the base portion is coated with a resin material. Grizzly feeder.

6. The Grizzly feeder according to any one of claims 1 to 5, The bar portion has a harder hardness than the base portion. Grizzly feeder.

7. The Grizzly feeder according to any one of claims 1 to 6, The upper surface of the base portion is composed of one or more individual flat base portions whose height is reduced by steps along the longitudinal direction, and the bar portion is composed of one or more individual bar portions detachably disposed on each of the individual base portions. Grizzly feeder.

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