JPH0536552Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a sieve screen device in which both ends, which are the front and rear ends with respect to the transport direction of the sieved material, are fixed to a sieve frame. Contains sieve mesh with openings of 200 mesh or more.

(Prior art) When the above-mentioned sieve screen device is stretched over a sieve frame, for example, as disclosed in Japanese Utility Model Publication No. 57-31982,
Hooks are attached to the front and rear edges of the sieve screen with respect to the transport direction of the sieved material, and the front end hook is locked to a fixed hook of the sieve frame, and the proximal end hook is attached to a plurality of hooks that can move forward and backward of the sieve frame. The sieve screen is tensioned by engaging a hook bolt and adjusting the movement of the hook bolt.

(Problem to be solved by the invention) By the way, when tensioning the sieve screen, if an imbalance occurs in the tensile force between the hook bolts, local stress is generated in the sieve screen. In the case of sieve screens with mesh openings of 200 mesh or more, small wire diameter, and low rigidity, there is a risk that the stress may wrinkle the screen surface or break the joints of the screen with the hooks. .
For this reason, when adjusting the movement of the hook bolts, it was necessary to take great care to maintain a balance between the tensile forces of each bolt, which was very troublesome.

The present invention has been made in view of the above-mentioned circumstances, and it is an object of the present invention to provide a sieve screen device that can be easily stretched over a sieve frame even with a sieve screen having fine openings.

(Means for Solving the Problems) In order to achieve the above object, the present invention directly connects the front edge of the sieve screen with the hook in the direction of transport of the sieved material, and It is characterized in that the edge is joined to the hook in this order via an adjusting plate having the same width as the sieve screen and a polymeric elastic body.

(Structure) Hereinafter, the structure of the present invention will be explained in detail based on examples.

Figure 1 is an external view of the sieve device according to the present invention, Figure 2
The figure is an enlarged front view of section A in FIG. 1, and FIG. 3 is a longitudinal sectional front view of a sieve machine in which the sieve screen device of the present invention is installed.

In the figure, reference numeral 1 denotes a sieve screen device stretched within a sieve frame 2 of a sieve machine, and both ends of the sieve screen device 1 are fixed to the sieve frame 2 at the front and back with respect to the conveying direction of the sieved material. , are arranged so as to be inclined downward in the transport direction of the sieved material. Reference numeral 3 denotes an impacting body that swings and vibrates around a vibration shaft 4 and hits the lower surface of the sieve screen device 1 in a hammer-like manner. The sieve frame 2 has a chute 5 at the center of the lower surface.
The upper side wall is provided with an inlet 6, and the lower end wall is provided with an outlet 7.

Now, to explain the configuration of the sieve screen device 1 in detail, 8 is a sieve screen with an opening of 200 meshes or more,
A hook 9 is fixed to the edge of the sieve screen 8 on the front side with respect to the transport direction of the sieved material. The edge of the sieve screen 8 on the rear side with respect to the transport direction of the sieved material is joined to one edge of an adjustment plate 11 made of crosspiece-shaped hard plastic and having the same width as the sieve screen 8. , the other edge of the adjustment plate 11 is joined to one edge of a polymeric elastic body 12 having the same width as the sieve screen 8, and the other edge of the elastic body 12 has the same shape as the hook 9. It is connected to the hook 13 of. As shown in FIG. 2, the sieve screen 8, adjusting plate 11, polymeric elastic body 12, and hook 13 are bonded to each other with their edges overlapping each other through an adhesive.

Next, the mechanism for attaching the sieve screen device 1 configured as described above to the sieve frame 2 will be described in detail. 14 is attached to both side walls of the rear end side of the sieve frame 2, perpendicular to the conveyance direction of the sieved material. This is a hook bolt attachment member that spans over, and on the attachment member 14, a plurality of hook bolts 15 whose tips are formed into hooks are arranged at approximately equal intervals.

When a nut 16 screwed onto the base end is rotated, the hook bolt 15 can be moved back and forth with respect to the transport direction of the sieved material. Note that 17 is a tension member that pushes up and supports the sieve screen device 1, and 18 is a fixing hook that is stretched across both walls of the front end side of the sieve frame 2 in a direction perpendicular to the conveyance direction of the sieved material.

(Operations and Effects) To explain the case where the sieve screen device 1 is stretched over the sieve frame 2 of the sieve machine configured as described above, first, the front end side hook 9 of the sieve screen device 1 is attached to the fixing hook 18 of the sieve frame 2. to be locked. Next, the hook 13 on the rear end side of the sieve device 1
is engaged with the hook portion of the hook bolt 15, and the nut 16 is rotated to move the hook bolt 15 backward, thereby giving the sieve screen 8 a predetermined tension. At this time, if an imbalance occurs in the pulling force between the hook bolts 15, the polymer elastic body 12 joined adjacent to the rear end side hook 13 of the sieve screen device 1 is stretched and deformed over a wide range. Since the unbalance of the pulling force is absorbed, the generation of local stress on the entire sieve screen 8 is alleviated. Furthermore, the highly rigid adjusting plate 11 interposed between the polymer elastic body 12 and the rear edge of the sieve screen 8 prevents local stress from being generated at the rear end of the sieve screen 8. From the above, the generation of local stress on the sieve screen 8 is prevented, and the sieve screen 8
There is no possibility that the screen will wrinkle or the joints of the sieve screen 8 will be cut. As a result, the sieve screen device 1 can be stretched without using too much effort in adjusting the hook bolts 15.

In the embodiment, the forward and backward movement of the hook bolt 15 is adjusted by rotating the nut 16, but this may also be done by fixing the hook bolt 15 to the tip of the piston rod of the air cylinder and operating a switching valve.

[Brief explanation of the drawing]

Figure 1 is an external view of the sieve device according to the present invention, Figure 2
The figure is an enlarged front view of section A in FIG. 1, and FIG. 3 is a longitudinal sectional front view of a sieve machine in which the sieve screen device of the present invention is installed. 1... Sieve screen device, 2... Sieve frame, 8... Sieve screen,
9, 13... Hook, 11... Adjustment plate, 12...
Polymer elastic body, 15... Hook bolt, 18...
Fixed hook.

Claims (1)

[Scope of utility model registration request] Hooks 9 and 13 are attached to the front and rear edges of the sieve screen 8 in the transport direction of the sieved material, respectively, the front end hook 9 is locked to the fixed hook 18 on the front end of the sieve frame 2, and the rear end hook In the sieve screen device in which the sieve screen 13 is hooked to a hook bolt 15 on the rear end side of the sieve frame 2 and is tensioned, the rear end of the sieve screen 8 is provided with an adjustment plate having the same width as the sieve screen 8. 11 and a polymeric elastic body 12, and is connected to the hook 13 in this order.