JPH0639999U - Doctor blade support device - Google Patents

Abstract

(57) [Abstract] [Purpose] To simplify the structure of the doctor blade support device. [Structure] An L-shaped plate member 7 ₃ is projectingly provided on an upper surface of a front portion of a base plate 7 which is fixed to the upper surface of a support member 3 and abuts and supports the air tubes 10 ₁ and 10 _2, and the plate member 7 ₃ is by was air tube 10 ₁ of the front end side receiving member, it is simplified arrangement structure of the air tube receivers.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a doctor blade supporting device which is used by being pressed against a paper machine roll.

[0002]

[Prior art]

Generally, in a paper machine roll, paper stock, paper dust or foreign matter adheres to and accumulates on the roll surface as the roll continues, so while the roll is rotating, the doctor blade provided on the doctor blade support device is used. The adhered / deposited material is scraped off by being pressed against the outer peripheral surface. As shown in FIG. 3, the structure of this doctor blade support device is such that the finger portion 2 is provided with a blade holder mounting plane portion on the upper surface and a blade mounting portion 2 ₁ having an L-shaped cross section at the tip portion, and is provided at a substantially central portion. The bearing portion 2 ₃ of the support shaft 2 ₂ is provided in the portion. Then, the doctor blade 1 is sandwiched between the upper surface of the blade mounting portion 2 ₁ of the finger portion 2 and the lower surface of the tip of the blade holder 12, and the holder 12 is attached to the flat surface portion of the blade holder by a plurality of mounting screws 11 to attach the blade 1 to the blade 1. Is fixed to the finger part 2. Further, on the upper surface of the support member 3 for supporting the fingers 2 and the bracket 6, a base plate 7 which is a boat across it has a rear end 7 ₂ of the substantially L-shaped, with its front half upward slope The thus formed water receiving member 8 is superposed and fixed by bolts, nuts 4 and 5 in this order so that the front half of the water receiving member 8 is positioned immediately below the blade 1. Then, a pair of air tubes 10 ₁ and 10 ₂ for finely adjusting the contact pressure of the doctor blade 1 are attached to the upper surface of the base plate 7 and to the left and right of the bracket 6, and then the support shaft 2 ₂ of the finger portion 2 is attached to the bracket ₂ . 6, the lower surface of the finger 2 is pressed against the air tubes 10 ₁ and 10 ₂ so as to be swingable, and the tip end side receiving member 2 ₄ of the air tube 10 _{1 is} arranged to project downward at the front part of the finger portion 2. It is a thing.

In the doctor blade supporting device, however, when the roll R rotates, the paper materials and the like attached to the roll R are scraped off by the doctor blade 1 and accumulated on the upper surface of the blade 1. In parallel with this, water also collects on the upper surface of the blade 1, most of which flows to both ends of the blade 1 along the upper surface and is discharged into place, and a part of the water drips onto the water receiving member 8. It flows to both ends and is discharged in place. When the contact pressure of the blade 1 with respect to the outer peripheral surface of the roll R is increased, for example, the expansion degree of the air tube 10 ₂ is increased and the expansion degree of the air tube 10 ₁ is decreased, so that the blade 1 is inclined forward. In order to swing the finger portion 2 to reduce the contact pressure, the operation opposite to the above is performed. In these cases, the receiving member 2 ₄ of the finger portion 2 serves as the receiving member on the tip side of the air tube 10 _1. , The rear end portion 7 ₂ of the base plate 7 is used as a receiving member on the rear end side of the air tube 10 ₂ , and the air tubes 10 ₁ and 10 ₂ are further deformed in the front-rear direction (left-right direction in FIG. 3). By preventing this, the accuracy of the blade 1 contact pressure adjustment by the air tube is guaranteed.

[0004]

[Problems to be solved by the device]

However, this conventional doctor blade supporting device, since members 2 ₄ receives air tube 10 ₁ tip side of the doctor blade 1 side and is formed integrally with the fingers 2, fabrication of the finger portion 2 becomes troublesome There was a problem. The present invention solves the above problems of the conventional device by projecting the receiving member on the base plate.

[0005]

[Means for Solving the Problems]

 According to the present invention, a doctor blade, which is pressed against the outer peripheral surface of the roll, is provided in the front portion of the finger portion, and the finger portion is swingably provided by a support shaft attached to the upper surface side of the support member. A pair of air tubes abuttingly arranged between a base plate provided on the upper surface and the lower surface of the finger portion, wherein an air tube tip side receiving member on the doctor blade side is projected on the upper surface of the base plate. It is a doctor blade supporting device.

[0006]

[Action]

 In order to increase the contact pressure of the doctor blade against the outer peripheral surface of the roll, the pressure of the pair of air tubes is adjusted to swing the fingers toward the roll. In this case, the doctor blade side air tube is compressed and deformed by the fingers. The leading end side of the blade is prevented from coming into contact with the receiving member and further deformed to the roll side, and the precision of the doctor blade contact pressure adjustment is maintained high.

[0007]

【Example】

To describe an embodiment of the present invention with reference to FIG. 1, the doctor blade 1, sandwiched between the blade mounting portion 2 ₁ a blade holder 12 of the fin guard portion 2, the support shaft received on the upper surface of the support member 3 bracket 6 and the base plate 7 which is a boat-shaped structure in which the front end portion 7 ₁ and the rear end portion 7 ₂ are bent upwards are superposed and fixed in this order by bolts, nuts 4 and 5, and the front end portion of the base plate 7 is fixed. The water receiving member 8 is formed by 7 ₁ , and a plurality of plate members 7 ₃ having an L-shaped cross section are welded to the upper surface of the base plate 7 in the vicinity of the distal end portion 7 ₁ at appropriate intervals in the longitudinal direction of the base plate 7. Set up. After mounting the pair of air tubes 10 ₁ and 10 ₂ on the upper surface of the base plate 7 and on the left and right of the bracket 6, the support shaft 2 ₂ of the finger portion 2 is supported by the bracket 6 so as to be swingable. The lower surface of the air tube is pressed against the air tubes 10 ₁ and 10 ₂ , and the plate body 7 ₃ is used as a receiving member on the tip side of the air tube 10 ₁ .

Next, in another embodiment shown in FIG. 2, the lower end edge of the finger portion 2 is V-shaped to make the blade holder 12 thinner than that of the embodiment of FIG. The reinforcing plate 13 is superposed and fixed on the upper surface, the tip of the reinforcing plate 13 on the side of the blade 1 is made parallel to the blade edge surface of the blade 1, and the supporting member 3 provided by inclining forward has an overall shape of a finger. V-shaped corresponding to the shape of part 2 and tip 7₁And the rear end 7₂ The base plate 7 bent upward is attached to the base plate 7 and the tip portion 7 of the base plate 7 is attached. ₁ The water receiving member 8 is formed by the plate body 7 having an L-shaped cross section.₃, Air tube 10₁, 10₂And the finger portions 2 are arranged in the same manner as in the embodiment of FIG.₃The air tube 10₁The receiving member on the front end side, the rear end portion 7 of the base plate 7₂ The air tube 10₂As the receiving member on the rear end side, further support shaft 2₂The distance between the blade and the edge surface of the blade 1 is made larger than that in the embodiment of FIG. In FIG. 2, reference numeral 14 is a rib for reinforcing the bracket 6. In this embodiment, since the thin blade holder 12 is reinforced by the reinforcing plate 13, the flexibility of the blade 1 in the longitudinal direction is increased, and the automatic blade contact adjusting function of the blade 1 is improved. By 13, the blade rigidity in the flow direction of the stock is increased and the doctor effect is improved. Also, support shaft 2₂Since the position of the above, that is, the fulcrum position of the blade 1 is moved as described above, the air tube 10 is₁, 10₂The responsiveness of swinging of the finger portion 2 due to is increased, and the doctor effect is improved accordingly.

[0009]

[Effect of device]

 As described above, according to the present invention, in the doctor blade supporting device in which a pair of air tubes are arranged between the base plate and the finger portion provided on the support member, the air tube tip side receiving member on the doctor blade side is provided on the upper surface of the base plate. By projecting, the structure of the receiving member is simpler than that of the conventional device in which the receiving member is projectingly provided on the lower surface side of the finger portion, and the cost can be provided at a low cost.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a cross-sectional view of another embodiment.

FIG. 3 is a sectional view of a conventional example.

[Explanation of symbols]

1 Doctor blade 2 Finger part 2 ₁ Blade mounting part 2 ₂ Spindle 2 ₃ Bearing part 2 ₄ Receiving member 3 Supporting member 4 Bolt 5 Nut 6 Bracket 7 Base plate 7 ₁ Tip part 7 ₂ Rear end part 7 ₃ Plate 8 Water receiver Parts 10 ₁ Air tube 10 ₂ Air tube 11 Mounting screw 12 Blade holder 13 Reinforcing plate 14 Rib

Claims (1)

[Scope of utility model registration request] 1. A doctor blade, which is pressed against the outer peripheral surface of a roll, is provided in the front part of a finger part, and the finger part is swingably provided by a support shaft attached to the upper surface side of the support member, and the support member A doctor in which a pair of air tubes are provided in contact with each other between a base plate provided on the upper surface and the lower surfaces of the finger portions, and an air tube tip-side receiving member on the doctor blade side is projectingly provided on the upper surface of the base plate. Blade support device.