JPH0114716Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a device for maintaining the gap between rolls in a roll-type crusher that crushes wood chips obtained by hanging logs on a chipper between a pair of rolls. It is something.

[Conventional technology and problems]

Wood chips obtained by passing logs through a chipper are difficult to digest in the pulp manufacturing process if they have a medium diameter larger than approximately 6 mm. It is also crushed by applying it to a pressure crusher. By the way, in the case of a roll-type crusher, if the clearance between the rolls is too small, the wood fibers of the wood chips will break, and if the clearance is too large, the wood fibers will not be fully unraveled, so it is necessary to adjust the clearance. required careful attention. However, in a conventional roll-type decompressor, a screw shaft is provided so that its tip touches the bearings at both ends of one of the fixed rolls out of a pair of rolls arranged parallel to each other, and the screw shaft is rotated by a handle. This allows the fixed roll to move forward and backward toward the other movable roll, allowing for clearance adjustment. However, according to this method, when the wood chips pass between the two rolls, a large force is applied to the screw shaft, causing a large play in the screw shaft and causing an error in the clearance between the two rolls. Therefore, it was necessary to frequently adjust the clearance. Moreover, with this structure, scattered wood powder cannot be avoided from adhering to the screw shaft, making it difficult to rotate the screw shaft and making adjustment work even more difficult.

[Purpose and structure of the invention]

The purpose of the present invention is to stabilize the degree of crushing of wood chips by making it possible to maintain a constant clearance between both rolls over a long period of time. In a roll-type crusher in which rolls are arranged parallel to each other and the wood chips are crushed by passing between the two rolls, the bearing of one roll pushes the roll toward the other roll. The present invention is characterized in that it is provided with a cylinder for adjusting the clearance, and a clearance adjustment tool made by overlapping a required number of thin plates on the surface of the bearing of one roll facing the bearing of the other roll.

〔Example〕

1a and 1b are a pair of rolls arranged parallel to each other and facing each other, and each of the rolls 1a and 1b is installed horizontally and parallel to each other at appropriate intervals vertically between supports 2a and 2b and 2c and 2d, respectively. Bearings 4a, 4b and 4c, 4d are installed between guide rails 3a, 3b and 3c, 3d, and each bearing 4
Both ends are rotatably supported between a and 4c and between bearings 4b and 4d. and one roll 1a
Bearings 4a and 4c that support the guide rail 3
A and 3c are fixed by welding with blocks 13, and the other roll 1b is fixed to supports 2a and 2c so that its bearings 4b and 4d can move along the guide rails 3b and 3d. The tips of the piston shafts 6, 6 of the hydraulic cylinders 5, 5 are fixed to one side of each bearing 4b, 4d, and the piston shafts 6, 6 move both bearings 4b, 4d to the guide rails 3a, 3b and 3c, The pressure is applied along the 3d. And bearing 4 of bearings 4b and 4d
Clearance adjusting tools 7, 7 are provided on the surfaces facing a, 4c, respectively. the clearance adjustment tool 7;
7 fixes a substrate 8 to each bearing 4b, 4d with bolts 14, superposes a required number of metal thin plates 10, 10, . A clamp plate 9 is fixed by inserting a bolt 11 through it so as to cover the...

The surfaces of each of the rolls 1a and 1b are formed with a large number of concavities and convexities, and the convex portions of the roll 1a engage with the concave portions of the other roll 1b, and the concave portions engage with the convex portions of the other roll 1b, respectively, in the directions indicated by the arrows. I'm trying to get it to rotate. In the figure, 12 and 12 are each roll 1
A motor that rotates a and 1b is shown.

However, in the roll gap maintaining device configured in this way, by applying a predetermined hydraulic pressure to the cylinders 5, 5, the clamping plates 9 of the clearance adjustment tools 7, 7 attached to one of the bearings 4b, 4d are fixed to the bearings 4a, 4b. to stop it. Both rolls 1a and 1b are moved by a motor 12,
The wood chips are rotated in the direction of the arrow by the drive of 12, and the wood chips are passed between the two rolls 1a and 1b, thereby applying surface pressure to the wood chips and crushing them.
To adjust the clearance between the rolls 1a, 1b, loosen the bolt 11, remove the clamp plate 9, increase or decrease the number of thin plates 10, 10, etc., and then tighten the clamp plate 9 and bolt 11. By doing so, the distance g of the clamping plate 9 from the bearing surfaces 4b and 4d is adjusted.

In the above embodiment, the clearance adjustment tools 7, 7 are provided on one of the bearings 4b, 4d, but the clearance adjustment tools may be provided on the surface of the other bearing 4a, 4c facing the bearings 4b, 4d.

[Effect of idea]

By adjusting the number of thin plates of the clearance adjustment tool, the clearance between the pair of rolls is accurately maintained at a required dimension, and the crushed state of the wood chips is stabilized. Therefore, there are practical effects such as easier maintenance.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention. Figure 1 is an enlarged cross-sectional view of the main part, Figure 2 is a front view showing the entire main part, and Figure 3 is a partially broken view. FIG. 1a, 1b...roll, 4a, 4b, 4c, 4
d...Bearing, 5...Cylinder, 7...Clearance adjustment tool, 9...Handle plate, 10...Thin plate.

Claims (1)

[Scope of utility model registration request] In a roll-type crusher in which a pair of rolls are arranged parallel to each other and the wood chips are crushed by passing between the two rolls, the bearing of one roll directs the roll toward the other roll. A roll-type pressure cracker for wood chips, characterized in that a cylinder for pressing the wood chips is provided, and a clearance adjustment device made by overlapping a required number of thin plates on the surface of the bearing of one roll facing the bearing of the other roll is provided. A roll gap holding device in a machine.