JPS598513Y2 - Blowback prevention device for grain culm supply port in threshing machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a thresher in a combine harvester or the like, and is intended to prevent blowback from the grain culm supply port.

By the way, in a threshing machine, the so-called handling drum wind is generated by the rotation of the handling cylinder in the handling chamber, and this blows out from the grain culm supply port into the grain part and prevents the smooth supply of grain, or the straw waste generated in the handling chamber. This is a factor that impedes work efficiency, such as causing various substances to be scattered outside and having various adverse effects on workers located near the supply port.

To counter this, a shield made of rubber sheet or the like is hung in front of the grain culm supply port, but this alone cannot sufficiently prevent blowback.

The present invention was developed in view of these circumstances, and the front end of the clamping rail, which is located above the feed chain and holds the stock side of the harvested grain culm between it and the chain, is used to feed the grain culm. In a structure that protrudes forward from the opening, a frame body having a similar shape to the front end of the rail is positioned on the tip side of the supply opening, and a frame body having a similar shape to the front end of the rail is positioned above the supply opening between the front end of the rail and the frame body. A shield made of a rubber sheet or the like is stretched and hung from the upper surface of the steel plate or the front side of the inlet steel plate, which is located at a higher place than the upper surface of the inlet steel plate. This is designed to almost completely prevent blowback.

This will be explained below with reference to the embodiment shown in the figure. 1 is the body of the threshing machine, 2 is a handling chamber provided in the upper part of the body, and a large number of handling teeth 3a are implanted on the circumferential surface of the chamber. The handling cylinder is mounted on a shaft, and a receiving net 4, a swinging sorting plate 5, etc. are arranged below the chamber, and a sorting chamber 6 is provided below.

Reference numeral 7 designates a grain culm supply port provided at the front of the handling room 2; 8 designates an entrance steel plate that protrudes forward from the lower side of the supply port to guide the grain culm to the supply port; A shield 9 made of rubber sheet or the like is suspended from the machine wall onto the entrance steel plate.

10 is a feed chain that runs in the longitudinal direction on the side of the machine; 11 is a pinning rail that is located above the chain above the inlet steel plate 8 and that supports the stock of grain culms between the feed chain 10; The rail has a structure in which a plurality of members are connected in a line, each member is movable up and down, and is pressed against the chain by a plurality of springs 12, thereby increasing the amount of grain culm supported. It is designed so that the required supporting power can be obtained regardless of the situation.

Reference numeral 13 denotes a frame body positioned on the tip side of the supply port in correspondence with the front end 11a of the rail 11 that protrudes forward (on the left side in FIG. 1) from the supply port 7, and is similar to the front end of the rail. Along with the shape, the rod 14
a and 14b, and the ends of the rods are respectively locked in vertically elongated holes 15a and 15b formed in the side plate 15 on the tip side. As the rail front end portion 11a moves up and down, the frame body 13 moves up and down integrally.

However, between the front end portion 11a of the rail and the frame 13, there is a shield 16 made of a rubber sheet or the like, and the upper surface of the shield 16 is located at the same position as or higher than the upper part of the supply port 7. The shields 9 and 16 are stretched over the upper surface and suspended from their front ends onto the lower inlet steel plate, thereby creating a structure in which shields 9 and 16 are provided twice in front of the supply port.

According to the above structure, the handling drum wind generated by the rotation of the handling drum 3 in the handling room 2 during threshing work is blown out from the grain culm supply port 7 without turning in the rotational direction of the handling drum. In this case, the first shield 9 first prevents the air from blowing out to the outside, and some of the wind that has passed through the shield 9 is further disposed in front of it. The air is blocked by the second shield 16, which substantially completely prevents the wind from blowing back to the outside.

Here, since the frame 13 that holds one side of the shield 16 is configured to move up and down integrally with the front end portion 11a of the rail, it has the effect of clamping the grain culm of the rail with the required force. Since it is not damaged and each shield is made of a rubber sheet or the like, movement of the grain culm on the entrance steel plate 8 is not obstructed.

In the illustrated embodiment, a rib-shaped protrusion 8a is provided on the edge of the inlet steel plate 8 on the supply port side, thereby reducing blowback from inside the handling chamber.

As described above, a frame body with a similar shape is installed above the feed chain located on the steel plate at the blowback inlet of the present invention and corresponding to the front end of the strapping rail that protrudes forward from the grain culm supply port. Located on the tip side of the supply port,
A shield made of a rubber sheet or the like is stretched and hung from the upper surface of the upper part of the supply port between the front end of the rail and the frame, or at a higher point than the above, so that the shield is suspended in front of the supply port. Due to the structure in which a double shield is provided in addition to the conventional shield, even if the handling cylinder wind that is about to blow out from the handling room passes through the first shield, the second shield This will almost completely prevent blowback from the supply port, which will facilitate the supply of grain culms and prevent scattering of straw waste, improving work efficiency. In particular, in the present invention, since the second shield is stretched using the front end of the rail, it is possible to prevent the structure from becoming significantly complicated just by providing the frame. It has some advantages.

[Brief explanation of the drawing]

Fig. 1 is a side view of the main parts of a threshing machine embodying the present invention, Fig. 2 is a front view thereof, Fig. 3 is a vertical side view taken along the line III-III in Fig. 2, and Fig. 4 is a side view of the threshing machine shown in Fig. 1 IV- It is a longitudinal sectional front view taken along the IV line. 7 is a grain culm supply port, 8 is an inlet steel plate, 9 and 16 are shields, 1
1a is the front end of the rail, 13 is the frame.

Claims (1)

[Scope of utility model registration request] A shield made of a rubber sheet or the like is hung over the grain culm supply port, and on the stock side of the supply port, the front end of the clamping rail located above the feed chain on the inlet steel plate is placed above the feed port. In a structure that protrudes forward, a frame body having a similar shape to the front end of the rail is positioned on the tip side of the supply port, and an upper piece of the supply port between the front end and the frame or this A grain culm in a threshing machine characterized in that a second shield made of rubber sheet or the like is not stretched to cover the top and front surfaces of both of the grains located at a higher location and hang down on the artificial steel plate. Blowback prevention device at supply port.