JPH0214927Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a conveyor type shot blasting device. In recent years, shot blasting has become an important processing process in the steel industry as a surface treatment for steel materials.In particular, shot blasting is used for steel structures and gusset plates for connection reinforcement to ensure quality and strength. This is commonly done.

However, in these conveyor-type shot blasting devices, the shot particles that are projected toward the workpiece to be polished accumulate on the workpiece.
Either the workpiece to be polished is taken out of the grinding room and cleaned and removed manually, or a sealed room with a built-in scraper or blower device is provided at the exit of the grinding room, and the work is cleaned using these devices. The shot particles that have accumulated on the workpiece are cleaned and removed.

However, manual work is inefficient, and in the case of a scraper method, the scraper wears out, reducing cleaning efficiency.Also, if the work to be polished is light, the contact resistance of the scraper causes the work to be shot. There are problems such as the grains moving out of the projection range and making it impossible to grind.

Further, in the case of the blower method, the required power is large, which poses a problem from the viewpoint of energy consumption, and there are also drawbacks such as difficulty in recovering the shot particles blown away by the jetted air and poor efficiency.

The present invention was developed in view of these problems, and it is an object of the present invention to provide a conveyor-type shot blasting device that can efficiently clean and remove shot particles accumulated on a workpiece to be polished using a simple device. This is the purpose. The configuration of the present invention will be explained below based on examples. Reference numeral 1 denotes a cleaning chamber, and an inlet/outlet 1a, 1b is provided on the same line on the opposite side wall surface, respectively. 2 penetrates the grinding chamber 1, has both ends protruding from the carry-in/outlets 1a and 1b, and is inclined downward to the side at an angle that allows the shot particles 7 on the grinding workpiece W being conveyed to fall naturally. The belt conveyor 2 is an endless belt conveyor, and the belt conveyor 2 is passed around between a pair of pulleys 3, 3, and each pulley shaft 4 has a bearing 5 attached to a support frame (not shown).
A drive motor shaft (not shown) is connected to one of the pulley shafts 4, and the pulleys 3 are rotatably driven by the operation of the drive motor. . A large number of stopper members 6 having a triangular planar shape are fixed to the upper surface of the belt conveyor 2 at approximately equal intervals in the longitudinal direction, with the tops facing inward. conveyor 2
The upper polishing workpiece W is prevented from sliding down, and the shot grains 7 projected toward the polishing workpiece W are prevented from accumulating. Reference numeral 8 is a bucket elevator which, after cleaning the work W to be polished, transports the inclined belt conveyor 2 and the work W to be polished.
It is provided so that the shot grains that have slid down the top and naturally fallen into a collection hopper (not shown) below can be transported to the separator device 9 above. The separator device 9 is connected to a tank 10 and a projection device 12 via a supply pipe 11, and the shot particles circulated and collected by the separator device 9 via a bucket elevator 8 are separated from dust and sent to the tank 10. , and a supply pipe 11 to a projection device 12, and is projected from the projection device 12 toward a workpiece W to be polished on a belt conveyor 2.

With this configuration, when the belt conveyor 2 is rotationally driven by the operation of a drive motor (not shown), and the abrasive work W is placed on the upper surface of the belt conveyor 2 on the conveyance start end side, the abrasive work W is rotated. The inclined lower edge is connected to the belt conveyor 2.
The belt conveyor 2 is carried into the cleaning chamber 1 through the carrying-in port 1a as the belt conveyor 2 rotates without slipping because it is abutted and supported by a stopper member 6 fixed to the slanted lower edge of the upper surface. The workpiece W carried into the grinding chamber 1 is polished and peened by the shot grains 7 projected from the projection device 12, and is placed on the belt conveyor 2 from the outlet 1b and sent to the grinding chamber 1. It is carried outside. On the other hand, the shot grains 7 projected from the projection device 12 toward the abrasive workpiece W collide with the abrasive workpiece W, and after grinding and peening the abrasive workpiece W, it is tilted as shown in FIG. It slides down on the belt conveyor 2 and the work W to be polished, and without being retained by the stopper member 6, it passes between the stopper members 6 and falls naturally into a collection hopper (not shown) below, and is transported to the bucket elevator. After being conveyed to the upper separator device 9 via 8, where it is separated from dust, it is again supplied to the projection device 12 via the tank 10 and supply pipe 11, and is reused. Thereafter, the above operation is repeated.

In the above embodiment, the planar shape of the stopper member 6 is triangular, but it is not limited to the triangular shape, and may be semicircular.

In short, the present invention provides a conveyor-type shot blasting device that projects shot particles from above the belt conveyor toward the workpiece while conveying the workpiece to be abrasive by a belt conveyor. The inclined lower edge of the abrasive work to be conveyed by the belt conveyor is tilted laterally at an angle that allows the shot grains on the abrasive work to fall naturally, and the inclined lower edge of the abrasive work to be conveyed by the belt conveyor is attached to the inclined lower edge of the upper surface of the belt conveyor. A plurality of stopper members each having a triangular or semicircular planar shape for supporting the shot particles are arranged at approximately equal intervals in the longitudinal direction with their tops facing inward, making it possible to efficiently clean and remove shot grains. In addition, it saves energy, eliminates the need to separately provide a scraper device, a blower device, etc., reduces equipment costs, and has the effect of making a significant contribution to this type of industry.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of the present invention, and FIG. 2 is a partially enlarged view showing the state in which shot particles are falling. 1: Grinding room, 1a: Loading port, 1b: Loading port,
2: Belt conveyor, 6: Stopper member.

Claims (1)

[Scope of utility model registration request] In a conveyor-type shot blasting device that projects shot particles from above the belt conveyor toward the abrasive work while conveying the abrasive work on a belt conveyor, the belt conveyor 2 is used to convey the abrasive particles conveyed by the belt conveyor 2. The work W is tilted laterally at an angle that allows the shot grains 7 on the work W to fall naturally, and the lower slope of the workpiece W being conveyed by the belt conveyor 2 is attached to the edge of the lower side of the slope on the upper surface of the belt conveyor 2. A conveyor-type shot blast characterized in that a plurality of stopper members 6 each having a triangular or semicircular planar shape for supporting edge portions are provided at approximately equal intervals in the longitudinal direction with their tops facing inward. Device.