JPH09150948A - Scraper device for belt conveyor - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: The mold sand is supplied to the molding machine side without leaving the mold sand on the conveyor belt to reduce the molding cost, and in addition, the mold sand is prevented from spilling down during transportation, and the conveyor belt is also provided. To supply mold sand without abrading the mold. SOLUTION: The scraper main body 2 which is close to and away from the forward conveyor belt B of the belt conveyor C, and the scraper main body 2 is provided on the downstream side in the traveling direction of the forward conveyor belt B and is close to the forward conveyor belt B. The mold sand that has passed under the scraper body 2 that has been formed is a sand distribution chute 30
The belt inclining mechanism 10 for inclining the forward conveyor belt B so as to be able to be dropped is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a large number of mold making machines, in which different kinds of mold sands required for the respective mold making machines are fed by one belt conveyor. The present invention relates to a scraper device for a belt conveyor, which is used for dropping the sand into a sand distribution chute of a predetermined mold making machine arranged on the side of the belt conveyor.

[0002]

2. Description of the Related Art Conventionally, as a scraper device for a belt conveyor, for example, there is one shown in FIG.

As shown in FIG. 3, this scraper device 5
1 is a cylinder rod 52 on the side of the belt conveyor Cv.
Vertical air cylinder 52 installed with a facing up
And the cylinder rod 5 of this vertical air cylinder 52.
An arm 53, one end of which is pivotally connected to 2a, and pillow blocks 54, 5 located on both sides of the belt conveyor Cv.
4 is rotatably installed between the four and one end is an arm 53.
Of the rotary shaft 55 fixed to the other end of the leg and the bent portion of the V-shape that is positioned upstream in the traveling direction of the forward conveyor belt Be (the direction from the lower right to the upper left in the figure). The scraper main body 56 is attached to the intermediate portion of the rotary shaft 55 via the portions 56a and 56a.

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 vertical air cylinder 52 is used. The rod push-out operation of the scraper body 5
By pressing 6 onto the forward conveyor belt Be of the belt conveyor Cv, the scraper body 56 scrapes off the mold sand on the forward conveyor belt Be and drops it into the sand chute 57, 57.

[0005]

However, in this conventional scraper device 51, most of the mold sand is used for the sand distribution chute 5.
Although the scraper main body 56 can be dropped into 7, 57, the scraper main body 56 is pressed against the forward conveyor belt Be of the belt conveyor Cv from above.
The mold sand that has entered between the front side conveyor belt Be and the front side conveyor belt Be passes through the scraper main body 56, and the mold sand passing through the scraper main body 56 moves to the belt folding point on the end side while adhering to the front side 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 folding point on the starting end side together with the backward conveyor belt.

Further, the mold sand that has passed through the scraper device 51 is crushed by the scraper main body 56 and its strength is reduced. It is of course possible to avoid reusing the mold sand of which the strength has been reduced, but of different types. In order to avoid mixing with the mold sand, the mold sand still attached to the forward conveyor belt Be and the mold sand sprinkled over the entire length of the belt conveyor Cv must be discarded.
There was a problem that the molding cost was high.

Further, since the scraper body 56 is pressed against the forward conveyor belt Be of the belt conveyor Cv,
There is a problem that the advance-side conveyor belt Be is hindered from moving due to being hindered and the mold sand is spilled from the advance-side conveyor belt Be, and the conveyor belt Be is worn away. It has been a conventional problem to do so.

[0008]

SUMMARY OF THE INVENTION The present invention has been made by paying attention to the above-mentioned conventional problems. For example, when the mold sand is supplied to the mold making machine, the mold sand on the conveyor belt is hardly left behind. It is possible to supply to the molding machine, and as a result, it is possible to realize a reduction in molding cost, in addition to prevent spilling of the molding sand during transport, and to mold the sand for the molding machine without abrading the conveyor belt. It is an object of the present invention to provide a scraper device for a belt conveyor that can supply the above.

[0009]

According to a first aspect of the present invention, there is provided a scraper main body which is close to and away from a forward conveyor belt of a belt conveyor, and a downstream side of the scraper main body in a forward conveyor belt traveling direction. It is characterized in that it is provided with a belt tilting mechanism for tilting the forward side conveyor belt to the side, means for solving the conventional problems described above the configuration of the scraper device for this belt conveyor I am trying.

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 forward conveyor when the mold sand is supplied to the molding machine. To prevent crushing mold sand between the belt,
It is preferably about 3 mm, and the inclination angle of the conveyor belt on the advancing side is preferably about 45 ° so that the movement of the non-inclined portion of the conveyor belt is not significantly affected.

In the invention according to claim 2 of the present invention,
The belt inclining mechanism includes a support shaft disposed above the forward conveyor belt and in a traveling direction of the forward conveyor belt, and a belt pressing unit that rotates around the support shaft to press the forward conveyor belt to incline. Is provided.

In the invention according to claim 3 of the present invention,
The belt inclining mechanism is a support shaft that is arranged above the substantially center line of the forward conveyor belt and in the traveling direction of the forward conveyor belt, and rotates in opposite directions around the support shaft to rotate the forward conveyor belt. In the invention according to claim 4 of the invention, there are provided two belt pressing portions that press both sides of the substantially center line to incline in opposite directions with the substantially center line as a boundary. The tilting mechanism is configured to include a plurality of sets of two belt pressing portions that rotate in mutually opposite directions.

In the invention according to claim 5 of the present invention,
The belt inclining mechanism is provided with a long belt receiver on the back side of the forward conveyor belt along the substantially center line of the forward conveyor belt. In the invention according to claim 6 of the present invention, the belt inclining mechanism is provided. The belt pressing part of the mechanism is
A roller shaft rotatable around a support shaft and a roller rotatably supported by the roller shaft are provided.

The invention according to claim 7 of the present invention comprises a vibrating means for vibrating the forward conveyor belt tilted by the belt tilting mechanism, and the invention according to claim 8 of the invention is a belt. The tilting mechanism is provided with vibration imparting means.

In the invention according to claim 9 of the present invention,
The belt pressing portion of the belt tilting mechanism includes a roller shaft that is rotatable about a support shaft, a roller that is rotatably supported by the roller shaft, and a plurality of convex portions provided on the outer peripheral surface of the roller. In the invention according to claim 10 of the present invention, the convex portion as the vibration imparting means has a cylindrical shape, and the outer peripheral surface of the roller is constituted by a plurality of convex portions provided on the outer peripheral surface of the roller. In this case, the cylindrical projections are arranged at approximately equal intervals in the circumferential direction, and in this case, in order to give a vibration having a short cycle and not a small amplitude to the conveyor belt, the projections of about 72 ° It is desirable to provide them at 5 places with the space between.

[0016]

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 the belt conveyor and supplied to the mold making machine on the side of the belt conveyor, the scraper body is moved to the forward conveyor belt. When approaching to, the majority of the mold sand on the forward conveyor belt is dropped to the mold making machine side.

At this time, on the downstream side of the forward direction of the forward side conveyor belt of the scraper body, the belt inclining mechanism operates to incline the forward side conveyor belt toward the side of the mold making machine. All the mold sand that has passed through will be dropped into the mold making machine side.

Therefore, the mold sand is prevented from being scattered over the entire length of the belt conveyor, and
Since the strength of the mold sand does not decrease and the mold sands of different types do not mix with each other, almost no mold sand is discarded at the time of conveyance and supply, and the molding cost can be reduced.

Further, since the scraper main body does not press-contact with the conveyor belt on the forward side of the belt conveyor, the conveyor belt on the forward side does not meander, and spilling of mold sand from the conveyor belt on the forward side is prevented, and the conveyor belt is also prevented. Wear of the belt will be suppressed to a small extent.

In the scraper device for a belt conveyor according to claim 2 of the present invention, when the belt pressing portion of the belt tilting mechanism is rotated around the support shaft, the belt pressing portion presses the forward conveyor belt and the mold making machine. Since it is inclined to the side, all the sand that has passed below the scraper body will be dropped to the mold making machine side.

In the scraper device for a belt conveyor according to claim 3 of the present invention, when the two belt pressing portions of the belt inclining mechanism are rotated about the support shaft in opposite directions to each other, 2
Since each belt pressing portion presses both sides of the approximate center line of the forward conveyor belt and inclines in mutually opposite directions with the approximate center line as a boundary, for example, sand distribution arranged on both sides of the belt conveyor, respectively. Since the mold sand is dropped into the chute, the scraper device for a belt conveyor according to claim 4 of the present invention has a large number of inclined portions of the forward conveyor belt, and the more reliable drop of the mold sand. It will be complicated.

In the belt conveyor scraper device according to the fifth aspect of the present invention, when the two belt pressing portions press both sides of the approximate center line of the forward conveyor belt, the approximate center line of the forward conveyor belt is obtained. Since the long belt receiver supports the above portion from below, the forward conveyor belt can be bent with almost no distortion around the substantially center line, and in the scraper apparatus for a belt conveyor according to claim 6 of the present invention, With the above configuration, the burden on the forward conveyor belt when the belt pressing portion presses the forward conveyor belt to incline it becomes light.

In the scraper device for a belt conveyor according to claim 7 of the present invention, since the inclined forward conveyor belt vibrates, the mold sand is more likely to drop from the forward conveyor belt. Since the belt conveyor scraper device is configured as described above, the installation space for the vibration imparting means is unnecessary, and in the belt conveyor scraper device according to claim 9 of the present invention, a plurality of rollers provided on the outer peripheral surface of the roller are provided. Since the convex portion presses the forward conveyor belt and the repulsive force of the conveyor belt itself at this time is used to cause the conveyor belt to vibrate, vibration can be imparted to the forward conveyor belt with a simple structure. Accordingly, in the scraper device for a belt conveyor according to claim 10 of the present invention, the front part formed by the plurality of convex portions Since the pressing of the side conveyor belts 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]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show an embodiment of a scraper device for a belt conveyor according to the present invention. In this embodiment, the scraper device for a belt conveyor according to the present invention is used as a sand mold for a molding machine. The following shows a case where the mold sand on the belt conveyor is used to drop the sand into the sand distribution chute of the mold making machine located on the side of the belt conveyor when carrying and supplying.

As shown in FIGS. 1 and 2, this scraper device 1 for a belt conveyor is provided on a base Cb to which a belt supporting roller Cr of a belt conveyor C is fixed and is arranged close to and away from a forward conveyor belt B. The scraper main body 2 and the belt inclining mechanism 10 that is provided on the downstream side of the scraper main 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, The scraper body 2 is attached to a rotation shaft rotatably installed between pillow blocks (not shown) located on both bases Cb of the belt conveyor C, and an air cylinder (not shown) installed on the base Cb of the belt conveyor C. By transmitting the rod push-out output of the rod to the rotary shaft to rotate the rod, as shown by the alternate long and short dash line in FIG. Some distance from the belt B (3m
They are close to each other with an interval of about m.

The belt inclining mechanism 10 is a belt conveyor C.
Of the bases Cb, Cb, two columns each facing each other, the columns 11, 11 facing each other, the long beams 12, 12 erected between the upper ends of the columns 11, 11 aligned in the longitudinal direction of the belt conveyor C, and the belt The stand 14 is provided with the short beams 13 that are respectively installed between the upper ends of the columns 11 arranged in the direction orthogonal to the longitudinal direction of the conveyor C.
Between the short beams 13, 13 of the stand 14, a support shaft 15 located above the approximate center line of the forward conveyor belt B is installed via pillow blocks 16, 16.

Further, the belt tilting mechanism 10 includes a support shaft 15
Are rotatably provided in opposite directions to each other and are pressed on both sides of a substantially central line of the forward conveyor belt B to be inclined in mutually opposite directions with the approximately central line as a boundary, that is, substantially central Two belt pressing portions 2 that bend the forward conveyor belt B in an inverted V shape at the line
Two sets of 0 and 20 are provided in the traveling direction of the forward conveyor belt B, and these belt pressing portions 20 have a long plate shape, and one side edge portion of each of the belt pressing portions 20 is provided on the support shaft 15 on both sides of the support shaft 15. Frames 17 and 1 that are rotatably attached
Two of them are arranged in each of 7.

The belt pressing portion 20 comprises a roller shaft 21 arranged in a direction orthogonal to the longitudinal direction of the frame 17, and a roller 22 rotatably supported by the roller shaft 21. In this embodiment, A cylindrical convex portion 23 as a vibration imparting means is formed on the outer peripheral surface of the roller 22 in the circumferential direction by about 7 mm.
It is provided at a total of 5 places with an interval of 2 °.

Further, the belt tilting mechanism 10 is an air cylinder rotatably supported by a gate-type stand 18 provided between both bases Cb, Cb of the belt conveyor C via a longitudinal axis 19a of the belt conveyor C. Two air cylinders 19 and 19 are provided. By pivotally connecting the tips of the cylinder rods 19b and 19b facing downward of the air cylinders 19 and 19 to the frames 17 and 17, respectively,
By the rod pushing operation synchronized with each other, the belt pressing portions 20, 20 are rotated in opposite directions to be pressed to both sides of the substantially central line of the conveyor belt B on the forward side, and the conveyor on the forward side is defined with the substantially center line as a boundary. The belt B is bent in an inverted V shape.

In this case, the belt tilting mechanism 10 is provided with a round bar 25 as a long belt receiver along the substantially center line of the forward conveyor belt B on the back side of the forward conveyor belt B. The conveyor belt B can be bent with almost no distortion around the center line.

That is, the belt inclining mechanism 10 bends the forward conveyor belt B in an inverted V-shape at the belt pressing portions 20 and 20 with the substantially center line as a boundary, thereby making the scraper close to the forward conveyor belt B. The mold sand passing under the main body 2 is dropped into the receiving ports 30a, 30a of the sand distributing chutes 30 located on both sides of the belt conveyor C.

Reference numeral B'in FIG. 2 indicates a backward conveyor belt.

In this belt conveyor scraper device 1, when the mold sand is conveyed by the belt conveyor C, the scraper main body 2 is rotated from the position shown by the chain double-dashed line in FIG. Since it is close to the belt B at a slight interval, most of the mold sand on the forward conveyor belt B is dropped into the receiving ports 30a, 30a of the sand distribution chute 30 to the mold making machine. Since the main body 2 does not come into pressure contact with the forward conveyor belt B, the forward conveyor belt B is prevented from meandering, spilling of mold sand from the forward conveyor belt B is prevented, and in addition, the abrasion of the conveyor belt B is prevented. Will be suppressed to a small amount.

At the same time, on the downstream side of the scraper body 2, the air cylinder 19 in the belt tilting mechanism 10,
By the synchronized rod pushing operation of 19, the support shaft 1
The belt pressing portions 20, 20 on both sides of 5 rotate in mutually opposite directions, that is, move from the position shown by the solid line to the position shown by the chain double-dashed line in FIG. Both sides of the line are pressed, and the forward side conveyor belt B is bent into an inverted V shape with the substantially center line as a boundary. At this time, the belt pressing portions 20 and 20 are moved in the traveling direction of the forward side conveyor belt B. In addition to arranging two sets, the round bar 25 supports the portion of the forward-moving side conveyor belt B from the bottom, so that the forward-moving side conveyor belt B is almost distorted over a wide range with the substantially central line as a boundary. Since the mold sand that has passed below the scraper main body 2 is hardly left, it is dropped into the receiving ports 30a and 30a of the sand distribution chute 30 to the mold making machine because the mold sand is bent.

Further, in the belt inclining mechanism 10, since the cylindrical convex 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 belt pressing unit 20, the conveyor belt B itself does not require a separate installation space for vibration imparting means and does not complicate the vibration imparting structure. Since the vibration utilizing the repulsive force of the mold is regularly generated on the conveyor belt B, the mold sand is more easily dropped from the conveyor belt B on the forward side, and the mold sand is surely received by the receiving port 30a of the sand distribution chute 30 to the mold making machine. , 30a.

Therefore, in this belt conveyor scraper device 1, since the mold sand does not move while adhering to the conveyor belt B, it does not particularly move while adhering to the retreating side conveyor belt B '. Is prevented from being scattered over the entire length of the belt conveyor C, and in addition, the strength of the mold sand is reduced by being crushed by the scraper body 2, and the mold sand of different types is mixed due to the mold sand being attached to the conveyor belt B. As a result, the amount of molding sand that is discarded at the time of transportation and supply is almost eliminated, and the molding cost can be reduced.

In the above embodiment, when the scraper device for a belt conveyor according to the present invention conveys and supplies mold sand to the mold making machine, the mold sand on the belt conveyor is dropped into the sand distribution chute of the mold making machine. However, the present invention is not limited to this.

[0039]

As described above, according to the first aspect of the present invention,
In the belt conveyor scraper device according to the above, because of the above-mentioned configuration, for example, when the mold sand is conveyed by the belt conveyor and supplied to the mold making machine, the mold sand on the conveyed conveyor belt on the advance side is not left behind. It can be dropped into the molding machine side, as a result, it is possible to prevent the scattering of the molding sand over the entire length of the belt conveyor due to the adhesion to the conveyor belt, and it is possible to realize a reduction in molding cost, in addition, Since the scraper body does not contact the forward conveyor belt, it is possible to prevent spillage of mold sand during conveyance due to meandering of the forward conveyor belt, and it is possible to suppress wear of the conveyor belt to a significantly excellent effect. .

Further, in the scraper device for a belt conveyor according to claim 2 of the present invention, since it has the above-mentioned configuration, it is remarkably possible to drop all the mold sand passing under the scraper body to the mold making machine side. In the scraper device for a belt conveyor according to claim 3 of the present invention, which has an excellent effect, the mold sand that has passed below the scraper body is completely dropped onto, for example, sand distribution chutes arranged on both sides of the belt conveyor. The remarkable effect of being able to be inserted is brought about.

Furthermore, in the scraper device for a belt conveyor according to claim 4 of the present invention, since the inclined portion of the forward conveyor belt can be increased, the mold sand can be dropped more reliably by that amount, and the present invention In the scraper device for a belt conveyor according to claim 5, when the two belt pressing portions press both sides of the approximate center line of the forward conveyor belt, the forward conveyor belt is bounded by the approximate center line. The belt conveyor scraper device according to claim 6 of the present invention can be bent with almost no distortion, and since it has the above-mentioned configuration, the load on the forward conveyor belt when the forward conveyor belt is pressed by the belt pressing portion is reduced. The remarkable effect that it can be reduced is provided.

Furthermore, in the scraper device for a belt conveyor according to claim 7 of the present invention, since the mold sand is more likely to drop from the forward conveyor belt, the mold sand passing below the scraper body is not left and the mold molding machine side is left. Since the scraper device for a belt conveyor according to claim 8 of the present invention has the above-mentioned configuration, the installation space for the vibration imparting means is 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. In the scraper device for a belt conveyor according to claim 10 of the present invention, The belt can be subjected to regular vibrations, so that the Still more it is more likely to fall, resulting in a remarkably excellent effect that it can 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 a side view showing an embodiment of a scraper device for a belt conveyor according to the present invention.

FIG. 2 is a front explanatory view of the scraper device for a belt conveyor shown in FIG.

FIG. 3 is a perspective view showing a conventional scraper device for a belt conveyor.

[Explanation of symbols]

 1 Scraper Device for Belt Conveyor 2 Scraper Main Body 10 Belt Inclination Mechanism 15 Support Shaft 20 Belt Pressing Section 21 Roller Shaft (Belt Pressing Section) 22 Roller (Belt Pressing Section) 23 Convex Section (Belt Pressing and Vibration Applying Means) 25 Round Bar (Long belt receiver) C Belt conveyor B Forward conveyor belt

Claims (10)

[Claims] 1. A scraper body that is close to and away from a forward conveyor belt of a belt conveyor, and a belt that is provided on the downstream side of the scraper body in the traveling direction of the forward conveyor belt and inclines the forward conveyor belt to the side. A scraper device for a belt conveyor, which is equipped with a tilting mechanism. 2. The belt inclining mechanism includes a support shaft disposed above the forward conveyor belt and in a traveling direction of the forward conveyor belt, and rotates around the support shaft to press the forward conveyor belt. The scraper device for a belt conveyor according to claim 1, further comprising a belt pressing portion for inclining. 3. The belt inclining mechanism rotates in opposite directions around the support shaft, which is arranged above the substantial center line of the forward conveyor belt and in the traveling direction of the forward conveyor belt. 2. The belt conveyor according to claim 1, further comprising: two belt pressing portions that press both sides of a substantially central line of the forward conveyor belt to incline in mutually opposite directions with the substantially central line as a boundary. Scraper device. 4. The scraper device for a belt conveyor according to claim 3, wherein the belt inclining mechanism includes a plurality of sets of two belt pressing portions that rotate in mutually opposite directions. 5. The belt tilting mechanism comprises a long belt receiver on the back side of the forward conveyor belt and extending along a substantially center line of the forward conveyor belt.
The scraper device for a belt conveyor according to. 6. The belt pressing portion of the belt inclining mechanism includes a roller shaft rotatable about a support shaft and a roller rotatably supported by the roller shaft. The scraper device for a belt conveyor according to claim 1. 7. The scraper device for a belt conveyor according to claim 1, further comprising vibration applying means for applying vibration to the forward conveyor belt inclined by the belt inclining mechanism. 8. The scraper device for a belt conveyor according to claim 7, wherein the belt inclining mechanism is provided with vibration applying means. 9. The belt pressing portion of the belt tilting mechanism includes a roller shaft rotatable about a support shaft, a roller rotatably supported by the roller shaft, and a plurality of rollers provided on an outer peripheral surface of the roller. The scraper device for a belt conveyor according to claim 8, further comprising a convex portion, wherein the plurality of convex portions provided on the outer peripheral surface of the roller serve as vibration applying means. 10. The scraper device for a belt conveyor according to claim 9, wherein the convex portions as the vibration imparting means have a cylindrical shape and are arranged at substantially equal intervals in the circumferential direction on the outer peripheral surface of the roller.