JPH06191620A - Scraping device of belt conveyer - Google Patents

Abstract

PURPOSE:To eliminate rubbing between a belt and scraping claws so as to realize a long service life of the scraping claws, by suppressing the swaying of the tips of the scraping claws as far as possible, in a scraping device of a belt conveyer on which a pair of scraping claws are provided swayably. CONSTITUTION:A pair of scraping claws 9a and 9b before and behind in the length direction of a belt; a holding shaft 11 to hold swayable the pair of scraping claws 9a and 9b in the belt length direction at the intermediate position between both scraping claws; and an energizing mechanism 13 to press-contact the scraping claws 9a and 9b and the holding shaft 11 to the belt 1 side; are provided. And the holding shaft 11 is provided on almost a straight line to combine the tips of the scraping claws.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scraping device for scraping off the substances remaining on the return belt of a belt conveyor. More specifically, the scraping device is provided with a pair of scraping claws in the belt length direction. An urging mechanism is provided to support the take-up claws so that they can swing in the belt length direction and to press the scrape claws into pressure contact with the belt side. The present invention relates to a scraping device adapted to come into contact with a scraper.

[0002]

2. Description of the Related Art Conventionally, in a belt conveyor, one scraping claw is brought into pressure contact with the return belt in order to remove the remaining deposits on the return belt after discharging the conveyed product. However, in the case where only one scraping claw is used in this way, the scraping claw is intermittently separated from the belt by the fluctuation in the vertical direction of the belt during the operation of the conveyor, and as a result, the scraping of the remaining deposits is performed. There was a risk of unevenness.

In order to solve the above-mentioned drawbacks, the applicant of the present invention provides a pair of scraping claws in the belt length direction, and these pair of scraping claws are located below both scraping claws in the belt length direction. Proposed a scraping device which is swingably supported on the belt and provided with a biasing mechanism for pressing the scraping claw against the belt side, and has previously filed a patent application (Japanese Patent Application No. 3-1161).
No. 86). According to this, since at least one of the pair of scraping claws always contacts the belt in response to the fluctuation of the belt, the scraping is uniform.

[0004]

However, the apparatus of Japanese Patent Application No. 3-116186 has the following problems.

That is, as shown in FIG. 4b, when the belt 1 on the return side fluctuates in the vertical direction, a pair of scraping claws 51a.
Since 51b swings around the support shaft 51, the tip ends of the scraping claws 51a and 51b swing by HA along the length of the belt 1 on the return side. The runout HA may be in the conveying direction of the belt 1 on the return side or in the opposite direction. However, when the runout HA in the direction opposite to the carrying direction of the belt 1a occurs, the scraping claws 51a, 51b.
The tip of the belt and the belt 1 rub strongly against each other. as a result,
The degree of wear of the tips of the scraping claws 51a and 51b becomes severe, and in some cases, damage may occur.

An object of the present invention is to provide an apparatus having a pair of scraping claws capable of swinging, by suppressing the swinging of the tip of the scraping claws as much as possible, so that the scraping of the belt conveyor can be extended. To provide a taker.

[0007]

In order to solve the above problems, according to the present invention, the support shaft of the scraping claw is arranged at an intermediate portion on a substantially straight line connecting the tips of the pair of scraping claws.

[0008]

The pair of scraping claws oscillate with the middle part on the substantially straight line connecting the tips of the scraping claws as the fulcrum. for that reason,
The swinging of the tip of the scraping claw in the belt length direction can be suppressed as much as possible.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below.

FIG. 1 is a vertical sectional view (A-A in FIG. 2) showing a belt conveyor and a scraping apparatus according to this embodiment.
(Longitudinal sectional view taken along the line) is shown. FIG. 2 shows a plan view of FIG. FIG. 3 shows a vertical sectional view taken along the line BB of FIG. FIG. 4A shows an operation state diagram of this embodiment.

1 to 3 show the head pulley side of the belt conveyor. That is, the belt conveyer includes a belt 1 for carrying and carrying an object to be carried, a head pulley 2 for making a U-turn of the belt 1 from the carrying side 1a to the returning side 1b, and a belt 1 downstream of the head pulley 2. And a tension pulley 5 for pressing the belt 1 to apply tension to the belt 1.

The support shaft 3 of the head pulley 2 extends in the width direction of the belt 1 and is supported by bearings 4 at the left and right ends. The support shaft 6 of the tension pulley 5 also extends in the belt width direction and is supported by bearings 7 at the left and right ends.

Head pulley 2 with belt 1 in tension
Between the tension pulley 5 and the tension pulley 5, scraping means 8 for scraping off the remaining adhered matter on the return side 1b of the belt 1 is provided. That is, the scraping means 8 includes a pair of scraping claws 9a and 9b provided in the belt length direction and pressed against the belt 1, and the pair of scraping claws 9a and 9b.
A claw holding member 10 for holding the claw holding member, a support shaft 11 for swingably supporting the claw holding member in the belt length direction,
Bearings 12 for supporting the left and right ends of a support shaft 11 extending in the belt width direction are provided. The bearing 12 is fixed to the swing arm 14 of the urging mechanism 13, as described later.

A pair of swingable scraping claws 9a, 9b
Are pressed against the belt 1 by an urging mechanism 13 described later. Therefore, even if one scraping claw 9a (or 9b) separates from the belt 1 due to the vertical fluctuation of the belt 1, the other scraping claw 9b (or 9a) always comes into pressure contact with the belt 1.

The scraping claws 9a and 9b are made of a suitable material such as ceramic or metal. The support shaft 11 is arranged at an intermediate portion on a substantially straight line connecting the tip ends of the pair of scraping claws 9a and 9b. This is the scraping claw 9a when swinging.
This is to suppress the runout of the tip portion of 9b in the belt length direction as much as possible (see FIG. 4a). A biasing mechanism 13 for pressing the scraping claws 9a and 9b against the belt 1 is provided. That is, the urging mechanism 13 includes the scraping claws 9a and 9b.
Of the swing arm 14, a support shaft 15 that supports the swing arm 14 so that the swing arm 14 can swing up and down, and a swing arm. Tension spring 1 which is connected to the other end of the swing arm 14 and pulls the other end of the swing arm 14 upward to press the scraping claws 9a and 9b against the belt 1 side.
6 and an adjusting bolt 1 connected to the other end of the tension spring 16
7 and a support frame 18 to which the adjusting bolt 17 is screwed.

The tension spring 16 is moved by moving the adjusting bolt 17 up and down with respect to the support frame 18 and holding it at an appropriate position.
Pulling force on the belt 1 and the scraping claw 9a
The pressure contact force of 9b is adjusted.

On the left and right of the belt 1, there are frame 1
9 is extended. Sliders 20 are provided on the left and right frames 19 so as to be slidable along the tops of the frames 19. On the slider 20, a bearing 4 that supports the head pulley 2, a bearing 7 that supports the tension pulley 5, a support shaft 14 that supports the claw support member 10 and the biasing mechanism 13, and a biasing mechanism 13. The support frame 18 is integrally fixed.

One ends of adjusting bolts 21 are connected to the left and right sliders 20, respectively. The other end of the adjusting bolt 21 is screwed to the frame 19 side. Adjustment bolt 21
Is moved in the length direction of the frame 19 and held at an appropriate position, the head pulley 2 and the tension pulley 5 are moved to the frame length, and the tension of the belt 1 can be adjusted. However, if only the head pulley 2 and the tension pulley 5 are moved, the pressure contact state of the scraping claws 9a and 9b with respect to the belt 1 will fluctuate strongly. In the present embodiment, the scraping claw 9a is provided together with the head pulley 2 and the tension pulley 5.
Since 9b and its urging mechanism 13 are integrally moved horizontally, there is no change in the pressure contact state of the scraping claws 9a, 9b with respect to the belt 1.

The device configured as described above operates as follows.

The conveyed object placed on the belt 1 of the belt conveyor and conveyed is discharged on the head pulley 2 side. The conveyed product remains attached to the belt 1 on the return side after the discharge. A scraping claw 9 pressed against the belt 1 in a tension state between the head pulley 2 and the tension pulley 5.
a. 9b scrapes off the remaining deposits on the return side 1b of the belt 1.

The belt 1 on the return side fluctuates vertically due to vibration and impact. Due to the fluctuation of the belt 1, even if one of the scraping claws 9a and 9b is pushed by the belt 1 and separated from the belt 1, the supporting member 10 swings around the supporting shaft 11 as a fulcrum. By moving, the other claw 9b (or 9a) is pressed against the belt 1. Since at least one of the scraping claws 9a and 9b is constantly pressed against the belt, uneven scraping is eliminated.

Since the pair of scraping claws 9a and 9b swings about the support shaft 11 in the substantially straight line connecting the scraping claws 9a and 9b as a fulcrum, as shown in FIG. 4a, the scraping claws 9a and 9a. The runout in the belt length direction as shown by HB occurs at the root of 9b, but the runout in the belt length direction is not multiplied by the bluntness at the tips of the scraping claws 9a and 9b. Approximately, the scraping claws 9a and 9b swing up and down with respect to the belt 1 only at a predetermined position and repeat pressure contact or separation.

[0023]

As described above, the present invention has the following effects.

Since the pair of scraping claws swings about the support shaft of the intermediate portion on the substantially straight line connecting the scraping claws as a fulcrum, the swinging of the tip end of the scraping claws in the belt length direction at the time of swinging. It can be suppressed as much as possible. Therefore, abrasion between the tip of the scraping claw and the belt caused by the fluctuation of the belt can be suppressed, wear of the tip of the scraping claw can be suppressed, damage is less likely to occur, and thus the life of the scraping claw can be extended. it can.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view (longitudinal cross-sectional view taken along the line AA of FIG. 2) showing a belt conveyor and a scraping device according to an embodiment.

FIG. 2 is a plan view of FIG.

FIG. 3 is a vertical sectional view taken along line BB of FIG.

FIG. 4 (a) is an operation state diagram of an embodiment of the present invention, and FIG. 4 (b) is an operation state diagram of a conventionally known belt scraping device.

[Explanation of symbols]

 1 Belt 9a / 9b Scraping Claw 10 Support Member 11 Support Shaft 12 Bearing 13 Biasing Means 14 Swing Arm 15 Support Shaft 16 Tension Spring 17 Adjustment Bolt 18 Support Frame

Claims (1)

[Claims] 1. A pair of scraping claws provided in a belt length direction on a belt return side of a belt conveyor, and the pair of scraping claws swings in a belt length direction at an intermediate portion of both scraping claws. In a scraping device for a belt conveyor, which includes a support shaft that freely supports and a biasing mechanism for pressing the scraping claw against the belt side, the supporting shaft connects the tip ends of the pair of scraping claws. A scraping device for a belt conveyor, which is arranged on a substantially straight line.