JP3560091B2 - Scraper device for belt conveyor - Google Patents

Description

[0001]
[Industrial applications]
The present invention is, for example, in the case of supplying a different type of sand required for each mold making machine by a single belt conveyor for a large number of mold making machines, the mold sand being conveyed to the side of the belt conveyor. The present invention relates to a belt conveyor scraper device used for dropping into a sand distribution chute of a predetermined molding machine.
[0002]
[Prior art]
Conventionally, as the above-described scraper device for a belt conveyor, for example, there is a scraper device shown in FIG.
[0003]
As shown in FIG. 3, the scraper device 51 includes a vertical air cylinder 52 installed on a side of the belt conveyor Cv with the cylinder rod 52 a facing upward, and one end connected to the cylinder rod 52 a of the vertical air cylinder 52. Is pivotally mounted between an arm 53 whose part is pivotally connected and pillow blocks 54 located on both sides of the belt conveyor Cv, and has one end fixed to the other end of the arm 53. The drive shaft 55 has a substantially V-shape and its bent portion is positioned upstream in the traveling direction of the forward conveyor belt Be (direction from lower right to upper left in the figure) and is rotated via the legs 56a, 56a. It has a scraper body 56 attached to an intermediate portion of the shaft 55.
[0004]
In the scraper device 51, for example, when the mold sand conveyed by the belt conveyor Cv is supplied to the sand distribution chutes 57, 57 located on both sides of the belt conveyor Cv, the rod is pushed out of the vertical air cylinder 52. The scraper body 56 is pressed into contact with the forward conveyor belt Be of the belt conveyor Cv by the operation, so that the mold sand on the forward conveyor belt Be is scraped by the scraper body 56 and dropped into the sand distribution chutes 57, 57. I have.
[0005]
[Problems to be solved by the invention]
However, in this conventional scraper device 51, although most of the mold sand can be dropped into the sand distribution chutes 57, 57, since the scraper body 56 is pressed from above onto the forward conveyor belt Be of the belt conveyor Cv, the scraper body 51 is pressed. The mold sand that has entered between the conveyor belt 56 and the forward conveyor belt Be passes through the scraper body 56, and the mold sand that has passed through the scraper body 56 moves to the end point belt turning point while adhering to the forward conveyor belt Be. However, there is a problem that the belt is scattered over the entire length of the belt conveyor Cv while moving to the belt turning point on the starting end together with the retreating conveyor belt.
[0006]
In addition, the mold sand that has passed through the scraper device 51 is crushed by the scraper body 56 to reduce its strength, and it is of course possible to avoid reusing the mold sand whose strength has been reduced and to mix it with different kinds of mold sand. In order to avoid this, the molding sand that has adhered to the advancing-side conveyor belt Be and the molding sand that has been scattered over the entire length of the belt conveyor Cv must be discarded, and there is a problem that the molding cost increases accordingly. Was.
[0007]
Further, since the scraper body 56 is in pressure contact with the forward conveyor belt Be of the belt conveyor Cv, the advance of the forward conveyor belt Be is hindered, and the meandering is apt to meander. In addition, there is a problem that the conveyor belt Be is worn, and it has been a conventional problem to solve these problems.
[0008]
[Object of the invention]
The present invention has been made in view of the above-described conventional problems. For example, when supplying mold sand to a mold molding machine, the mold sand is supplied to the mold molding machine with almost no mold sand left on the conveyor belt. As a result, the molding cost can be reduced, and in addition, the mold sand can be prevented from falling off during transportation, and the mold sand can be supplied to the mold molding machine without abrasion of the conveyor belt. It is an object of the present invention to provide a scraper device for a belt conveyor that can perform the following.
[0009]
[Means for Solving the Problems]
The invention according to claim 1 of the present invention includes a scraper main body that approaches and separates from a forward conveyor belt of a belt conveyor, and a forward conveyor belt that is provided downstream of the scraper body in the forward conveyor belt traveling direction. A belt inclining mechanism for inclining laterally, the belt inclining mechanism being disposed above the forward side conveyor belt and in the traveling direction of the forward side conveyor belt; The present invention is characterized in that a belt pressing portion for pressing and inclining a conveyor belt is provided, and the configuration of the belt conveyor scraper device is a means for solving the above-mentioned conventional problems.
[0010]
In this belt conveyor scraper device, the distance between the scraper body and the forward conveyor belt when the scraper body is brought closer to the forward conveyor belt is, for example, the gap between the scraper body and the forward conveyor belt when supplying mold sand to the mold making machine. In order to prevent the mold sand from being crushed between them, it is preferable to set it to about 3 mm, and the inclination angle of the advance side conveyor belt is set so as not to greatly affect the operation of the portion of the conveyor belt that is not inclined. , About 45 °.
[0011]
In the invention according to claim 2 of the present invention, a scraper main body that approaches and separates from a forward-side conveyor belt of a belt conveyor, and a forward-side conveyor belt that is provided downstream of the scraper body in the forward-side conveyor belt traveling direction. A belt inclining mechanism for inclining laterally, wherein the belt inclining mechanism is disposed substantially above the center line of the forward-side conveyor belt and arranged in the traveling direction of the forward-side conveyor belt; Two belt pressing portions that rotate in the direction and press both sides of the substantially center line of the forward side conveyor belt to incline in opposite directions with the substantially center line as a boundary. The configuration of the belt conveyor scraper device is a means for solving the above-mentioned conventional problems.
[0012]
In the invention according to claim 3 of the present invention, the belt tilting mechanism is configured to include a plurality of sets of two belt pressing portions that rotate in mutually opposite directions, and in the invention according to claim 4 of the present invention, The belt inclining mechanism has a configuration in which an elongate belt receiver is provided along the substantially center line of the advancing conveyor belt on the back side of the advancing conveyor belt. The belt pressing portion of (1) is characterized by comprising a roller shaft rotatable around a support shaft, and a roller rotatably supported by the roller shaft, the scraper device for a belt conveyor. Is a means for solving the above-mentioned conventional problem.
[0013]
In the invention according to claim 6 of the present invention, a scraper main body that approaches and separates from a forward-side conveyor belt of a belt conveyor, and a forward-side conveyor belt that is provided downstream of the scraper body in the forward-side conveyor belt traveling direction. It is characterized in that it is provided with a belt inclining mechanism that bends into an inverted V-shape to incline both sides of a substantially center line to the side, respectively. It is a means to solve.
[0014]
The invention according to claim 7 of the present invention is configured to include vibration applying means for applying vibration to the forward conveyor belt inclined by the belt inclining mechanism, and the invention according to claim 8 of the present invention is directed to the belt inclining mechanism. The configuration is such that vibration imparting means is provided.
[0015]
In the invention according to claim 9 of the present invention, the belt pressing portion of the belt tilting mechanism includes a roller shaft rotatable around a support shaft, a roller rotatably supported by the roller shaft, and an outer periphery of the roller. A plurality of projections provided on the outer surface of the roller as vibration imparting means; and a projection as the vibration imparting means in the invention according to claim 10 of the present invention. The portion has a cylindrical shape and is arranged at substantially equal intervals in the circumferential direction on the outer peripheral surface of the roller. In this case, the convex portion having a cylindrical shape has a short period and an amplitude In order to provide a vibration that is not small, it is desirable to provide five points at intervals of about 72 °.
[0016]
Effect of the Invention
In the scraper device for a belt conveyor according to claim 1 of the present invention, for example, when the mold sand is conveyed by a belt conveyor and supplied to a mold forming machine on the side of the belt conveyor, when the scraper body is brought close to the forward conveyor belt, Most of the mold sand on the side conveyor belt is dropped into the mold making machine side.
[0017]
At this time, when the belt pressing portion of the belt tilting mechanism is rotated around the support axis, the belt pressing portion presses the forward conveyor belt and tilts it toward the mold making machine, so that the mold sand that has passed below the scraper body is Everything will be dropped on the mold making machine side.
[0018]
Therefore, the mold sand is not scattered over the entire length of the belt conveyor, and the strength of the mold sand is not reduced and the mold sands of different types are not mixed with each other. Is almost eliminated, and the molding cost is reduced.
[0019]
In addition, since the scraper body does not press against the forward conveyor belt of the belt conveyor, the forward conveyor belt does not meander, preventing mold sand from falling off the forward conveyor belt and abrasion of the conveyor belt. Is also reduced.
[0020]
In the belt conveyor scraper device according to claim 2 of the present invention, when the two belt pressing portions of the belt inclining mechanism are rotated in opposite directions about the support shaft, the two belt pressing portions move forward. Since both sides of the substantially center line of the belt are pressed and inclined in directions opposite to each other with the substantially center line as a boundary, for example, mold sand is dropped into sand distribution chutes respectively arranged on both sides of the belt conveyor. That is, in the scraper device for a belt conveyor according to the third aspect of the present invention, the inclined portion of the forward conveyor belt is increased, and the mold sand is more reliably dropped by that much.
[0021]
In the belt conveyor scraper device according to claim 4 of the present invention, when the two belt pressing portions press both sides of the approximate center line of the advance-side conveyor belt, a portion of the approximate center line of the advance-side conveyor belt is used. Since the elongate belt receiver is supported from below, the forward conveyor belt is bent almost without any distortion around its center line, and the belt conveyor scraper device according to claim 5 of the present invention has the above-described configuration. Therefore, the burden on the forward-side conveyor belt when the belt pressing unit presses and tilts the forward-side conveyor belt is light.
[0022]
In the belt conveyor scraper device according to claim 6 of the present invention, for example, when the mold sand is conveyed by the belt conveyor and supplied to the mold forming machine on the side of the belt conveyor, when the scraper body is brought closer to the forward conveyor belt, Most of the mold sand on the side conveyor belt is dropped into the mold making machine side, and at this time, the belt inclining mechanism operates to reverse the forward side conveyor belt on the downstream side of the scraper body in the advance direction of the forward side conveyor belt. Since it is bent into a V-shape and both sides of the center line are inclined to the sides, any mold sand that has passed below the scraper body is dropped into the mold making machine side.
[0023]
In the belt conveyor scraper device according to claim 7 of the present invention, since the inclined forward conveyor belt vibrates, mold sand is more easily dropped from the forward conveyor belt, and the belt conveyor scraper device according to claim 8 of the present invention. Since the scraper device has the above-described configuration, the installation space for the vibration applying means is unnecessary, and in the scraper device for a belt conveyor according to the ninth aspect of the present invention, a plurality of convex portions provided on the outer peripheral surface of the roller are used. Since the vibration of the conveyor belt is generated by using the repulsive force of the conveyor belt itself at this time by pressing the forward conveyor belt, the application of vibration to the forward conveyor belt is performed with a simple structure, In the scraper device for a belt conveyor according to claim 10 of the present invention, the forward conveyor by a plurality of convex portions is provided. Since the pressing of the belt are made periodically, it is assumed vibration occurring in the conveyor belt regular, mold sand from the forward side conveyor belt more easily even fall.
[0024]
【Example】
Hereinafter, the present invention will be described with reference to the drawings.
[0025]
FIGS. 1 and 2 show an embodiment of the belt conveyor scraper device according to the present invention. In this embodiment, the belt conveyor scraper device according to the present invention transfers mold sand to a molding machine. This shows a case where the mold sand on the belt conveyor is dropped into the sand distribution chute of the mold making machine located on the side of the belt conveyor when supplying the sand.
[0026]
As shown in FIGS. 1 and 2, a scraper device 1 for a belt conveyor is provided on a base Cb to which a belt support roller Cr of a belt conveyor C is fixed, and is provided with a scraper main body 2 which approaches and separates from a forward conveyor belt B. And a belt inclining mechanism 10 that is provided downstream of the scraper body 2 in the traveling direction of the forward conveyor belt B (the direction of the arrow in FIG. 1) and inclines the forward conveyor belt B to the side. Is mounted on a rotating shaft rotatably mounted between pillow blocks (not shown) located on both bases Cb of the belt conveyor C, and pushes out a rod of an air cylinder (not shown) installed on the base Cb of the belt conveyor C. By transmitting the output to the rotating shaft and rotating, as shown by the dashed line in FIG. It is adapted to close at a slight interval (interval of about 3mm) was.
[0027]
The belt inclining mechanism 10 is provided between the two bases Cb, Cb of the belt conveyor C, each of which is opposed to each other, and is provided between the upper ends of the columns 11, 11 arranged in the longitudinal direction of the belt conveyor C. And a stand 14 having a short beam 13 erected between upper ends of columns 11, 11 arranged in a direction perpendicular to the longitudinal direction of the belt conveyor C. A support shaft 15 located above a center line of the advance side conveyor belt B is provided between pillow blocks 16 and 13 between the support belts 13 and 13.
[0028]
Further, the belt inclining mechanisms 10 are provided on the support shaft 15 so as to be rotatable in opposite directions, respectively, and press both sides of a substantially center line of the advance side conveyor belt B, respectively, so that they are separated from each other at the substantially center line. Two sets of two belt pressing portions 20 and 20 are provided in the traveling direction of the forward side conveyor belt B so as to be inclined in opposite directions, that is, to bend the forward side conveyor belt B into an inverted V-shape around a substantially center line. Each of the belt pressing portions 20 is formed in a long plate shape, and two belt pressing portions 20 are provided on both sides of the support shaft 15, and one side edge of each of the frames 17 is rotatably attached to the support shaft 15. It is arranged.
[0029]
The belt pressing unit 20 includes a roller shaft 21 disposed in a direction perpendicular to the longitudinal direction of the frame 17 and a roller 22 rotatably supported by the roller shaft 21. The cylindrical projections 23 as vibration imparting means are provided at a total of five locations on the outer peripheral surface at intervals of about 72 ° in the circumferential direction.
[0030]
Further, the belt inclining mechanism 10 includes an air cylinder 19 rotatably supported by a portal stand 18 provided between both bases Cb, Cb of the belt conveyor C via a shaft 19a in the longitudinal direction of the belt conveyor C. By connecting the ends of the cylinder rods 19b, 19b facing downward of the air cylinders 19, 19 to the frames 17, 17, respectively, the belts are driven by the synchronized rod pushing operation of the air cylinders 19, 19. The pressing portions 20, 20 are rotated in opposite directions to each other and pressed against both sides of the approximate center line of the advance side conveyor belt B, and the advance side conveyor belt B is bent into an inverted V-shape around the approximate center line. Like that.
[0031]
In this case, the belt inclining mechanism 10 is provided with a round bar 25 as a long belt receiver along a substantially center line of the advance side conveyor belt B on the back side of the advance side conveyor belt B. Can be bent with almost no distortion around its center line.
[0032]
That is, the belt inclining mechanism 10 uses the belt pressing portions 20 and 20 to bend the forward-side conveyor belt B into an inverted V-shape around the approximate center line thereof, so that the scraper body 2 close to the forward-side conveyor belt B is bent. The mold sand passing below is dropped into the receiving ports 30a, 30a of the sand distribution chute 30 located on both sides of the belt conveyor C.
[0033]
In addition, the code | symbol B 'in FIG. 2 is a retreat side conveyor belt.
[0034]
In the belt conveyor scraper device 1, when the mold sand is conveyed by the belt conveyor C, the scraper main body 2 rotates from the position indicated by the two-dot chain line to the position indicated by the one-dot chain line in FIG. Since they approach each other at a slight interval, most of the molding sand on the conveyor belt B on the forward side is dropped into the receiving ports 30a and 30a of the sand distribution chute 30 to the mold making machine. Since it does not press against the forward side conveyor belt B, the forward side conveyor belt B does not meander, preventing mold sand from falling off from the forward side conveyor belt B, and in addition, reducing the wear of the conveyor belt B. Will be done.
[0035]
At the same time, on the downstream side of the scraper body 2, the belt pressing portions 20, 20 on both sides of the support shaft 15 are rotated in opposite directions by the synchronized rod pushing operation of the air cylinders 19, 19 in the belt tilting mechanism 10. In other words, it moves from the position shown by the solid line in FIG. 2 to the position shown by the two-dot chain line, and presses both sides of the approximate center line of the advance side conveyor belt B, respectively. The conveyor belt B is bent in an inverted V-shape. At this time, two sets of the belt pressing portions 20 are arranged in the traveling direction of the forward conveyor belt B, Since the round bar 25 supports the portion from below, the forward side conveyor belt B can be bent over a wide range with almost no distortion around its substantially center line. Inlet 30a of Haisuna chute 30 into the mold sand passes below the over path body 2 is almost left without mold molding machine, and be incorporated dropped to 30a.
[0036]
In the belt inclining mechanism 10, the cylindrical pressing portions 23 as vibration applying means are arranged on the outer peripheral surface of the roller 22 in the belt pressing portion 20 at substantially equal intervals in the circumferential direction. When the forward side conveyor belt B is pressed by the part 20, the repulsive force of the conveyor belt B itself is not required without separately providing a space for installing the vibration applying means and without complicating the structure of applying the vibration. Is generated regularly on the conveyor belt B, so that the sand is more easily dropped from the conveyor belt B on the forward side, and the sand is reliably inserted into the receiving ports 30a, 30a of the sand distribution chute 30 to the mold making machine. It will be dropped.
[0037]
Therefore, in the belt conveyor scraper device 1, the mold sand does not move while adhering to the conveyor belt B. In particular, the mold sand does not move while adhering to the retreat-side conveyor belt B '. It is prevented from being scattered over the entire length of C, and in addition, the strength of the molding sand is reduced by being crushed by the scraper main body 2, and the mixing of different kinds of molding sand due to the adhesion of the molding sand to the conveyor belt B. Since it disappears, the amount of the mold sand discarded at the time of transport and supply is almost eliminated, and the molding cost is reduced.
[0038]
In the embodiment described above, when the belt conveyor scraper device according to the present invention conveys and supplies the mold sand to the mold making machine, it is used to drop the mold sand on the belt conveyor into the sand distribution chute of the mold making machine. However, the present invention is not limited to this.
[0039]
【The invention's effect】
As described above, the belt conveyor scraper device according to claim 1 of the present invention has the above-described configuration. For example, when the mold sand is conveyed by the belt conveyor and supplied to the mold making machine, the forward side is used. Since the conveyor belt is inclined to the side, it is possible to drop all the mold sand on the forward conveyor belt that has been transported to the mold making machine side, and as a result, the entire length of the belt conveyor due to the adhesion of the mold sand to the conveyor belt. Can be prevented, and the molding cost can be reduced.In addition, since the scraper body does not contact the advance conveyor belt, mold sand during transportation due to meandering of the advance conveyor belt can be prevented. The belt according to claim 2 of the present invention is capable of preventing the wear of the conveyor belt while suppressing the wear. In conveyors scraper device, a mold sand to pass under the scraper body, for example, have significantly excellent effect capable of On drop not remain to Haisuna chute arranged on both sides of the belt conveyor provided.
[0040]
Further, in the belt conveyor scraper device according to claim 3 of the present invention, since the inclined portion of the forward side conveyor belt can be increased, the mold sand can be dropped more reliably by that amount. In the scraper device for a belt conveyor according to No. 4, when the two belt pressing portions respectively press both sides of the approximate center line of the advance side conveyor belt, the forward side conveyor belt is hardly distorted with respect to the approximate center line. The belt conveyor scraper device according to claim 5 of the present invention has the above-described configuration, so that when the belt pressing portion presses the forward conveyor belt, the load on the forward conveyor belt is reduced. This provides a remarkably excellent effect of being able to perform.
[0041]
Further, since the belt conveyor scraper device according to claim 6 of the present invention has the above-described configuration, for example, when the mold sand is conveyed by the belt conveyor and supplied to the mold making machine, both sides of the forward conveyor belt are used. Are inclined to the side, respectively, so that the molding sand on the conveyor belt on the forward side which has been conveyed can be completely dropped into the molding machine side, and as a result, the adhesion of the molding sand to the conveyor belt results in the entire length of the belt conveyor. It is possible to prevent scattering and to reduce the molding cost.In addition, since the scraper main body does not contact the forward conveyor belt, it prevents mold sand from dropping during transportation due to meandering of the forward conveyor belt. And at the same time, significantly reduce the wear of the conveyor belt. It is.
[0042]
Still further, in the belt conveyor scraper device according to claim 7 of the present invention, since the mold sand is more easily dropped from the advancing conveyor belt, the mold sand that has passed below the scraper body is dropped into the mold molding machine side without leaving. The scraper device for a belt conveyor according to claim 8 of the present invention has the above-described configuration, so that the installation space for the vibration applying means can be made unnecessary. In the scraper device for a belt conveyor according to claim 9 of the present invention, the forward conveyor belt can be vibrated with a simple structure, and in the scraper device for a belt conveyor according to claim 10 of the present invention, the conveyor belt is regularly arranged. Vibration can occur, resulting in more mold sand from the advancing conveyor belt. Is Chiyasuku results in markedly excellent effect capable of On drop into the mold the molding machine side without leaving the mold sand passes below the scraper body.
[Brief description of the drawings]
FIG. 1 is an explanatory side view showing an embodiment of a belt conveyor scraper device according to the present invention.
FIG. 2 is an explanatory front view of the belt conveyor scraper device shown in FIG. 1;
FIG. 3 is an explanatory perspective view showing a conventional belt conveyor scraper device.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 scraper device for belt conveyor 2 scraper body 10 belt tilting mechanism 15 support shaft 20 belt pressing portion 21 roller shaft (belt pressing portion)
22 Roller (belt pressing part)
23 convex part (belt pressing part and vibration applying means)
25 round bar (long belt receiver)
C Belt conveyor B Forward conveyor belt

Claims (10)

A scraper main body that approaches and separates from the forward conveyor belt of the belt conveyor, and a belt inclining mechanism that is provided downstream of the scraper main body in the forward conveyor belt traveling direction and inclines the forward conveyor belt to the side, The belt inclining mechanism includes a support shaft disposed above the forward-side conveyor belt and in the traveling direction of the forward-side conveyor belt, and a belt pressing unit that rotates around the support shaft and presses and tilts the forward-side conveyor belt. A scraper device for a belt conveyor, comprising: A scraper main body that approaches and separates from the forward conveyor belt of the belt conveyor, and a belt inclining mechanism that is provided downstream of the scraper main body in the forward conveyor belt traveling direction and inclines the forward conveyor belt to the side, The belt inclining mechanism includes a support shaft disposed substantially above the center line of the advance-side conveyor belt and in the traveling direction of the advance-side conveyor belt, and is rotated around the support shaft in mutually opposite directions to rotate the advance-side conveyor belt. A scraper device for a belt conveyor, comprising: two belt pressing portions that press both sides of a substantially center line and incline in directions opposite to each other with the substantially center line as a boundary. The scraper device for a belt conveyor according to claim 2, wherein the belt tilting mechanism includes a plurality of sets of two belt pressing portions that rotate in mutually opposite directions. The scraper device for a belt conveyor according to claim 2 or 3, wherein the belt inclining mechanism includes a long belt receiver along a substantially center line of the forward conveyor belt on the back side of the forward conveyor belt. The belt according to any one of claims 1 to 4, wherein the belt pressing portion of the belt tilting mechanism includes a roller shaft rotatable around a support shaft, and a roller rotatably supported by the roller shaft. Conveyor scraper device. A scraper body that is close to and separated from the forward conveyor belt of the belt conveyor, and a forward conveyor belt that is provided downstream of the scraper body in the advance direction of the forward conveyor belt and that is bent into an inverted V-shape, A scraper device for a belt conveyor, comprising a belt inclining mechanism for inclining both sides to each side. The scraper device for a belt conveyor according to any one of claims 1 to 6, further comprising vibration imparting means for imparting vibration to the forward conveyor belt tilted by the belt tilting mechanism. The scraper device for a belt conveyor according to claim 7, wherein a vibration imparting means is provided in the belt tilting mechanism. The belt pressing portion of the belt inclining mechanism includes a roller shaft rotatable around a support shaft, a roller rotatably supported by the roller shaft, and a plurality of protrusions provided on an outer peripheral surface of the roller. 9. The scraper device for a belt conveyor according to claim 8, wherein a plurality of convex portions provided on an outer peripheral surface of the roller serve as vibration applying means. The scraper device for a belt conveyor according to claim 9, wherein the projections as the vibration applying means have a cylindrical shape and are disposed at substantially equal intervals in a circumferential direction on an outer peripheral surface of the roller.

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