JP3098748B1 - Circular saw polishing equipment for log paper cutting equipment - Google Patents

Abstract

An object of the present invention is to provide a circular saw polishing apparatus for a log paper cutting apparatus, which can polish a circular saw blade without waving, and can always maintain the sharpness of the circular saw after polishing. A holder, a non-rotating support shaft attached to the holder, a lightweight material-made cylindrical support base rotatably mounted via a bearing to a tip of the support shaft; A ring-shaped whetstone attached to the tip of the holder
The support shaft 11 composed of 14 is supported by a ball spline bearing, and is normally urged in the direction of contact with a spring 17 circular saw.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a circular saw polishing apparatus for a log paper cutting apparatus. The log paper is obtained by winding the paper into a log shape, and when this paper is cut into a predetermined length, it becomes toilet paper or kitchen roll paper. Generally, paper made by a paper machine is wide and is wound by a winder as it is to a large diameter (about 2 to 4 m in diameter). The large-diameter roll paper is wrapped around a small diameter (φ100 to φ120 for toilet paper, φ110 to 130 for kitchen roll paper, etc.), and the log paper is a log paper having a small diameter and a long length. 100 of this log paper
It can be cut at ~ 114mm intervals into toilet paper,
A log paper cutting device cuts at intervals of about 220 mm to 230 mm and finishes it into kitchen roll paper.

[0002]

2. Description of the Related Art As a conventional log paper cutting device, there is one disclosed in Japanese Patent Application Laid-Open No. 4-209156. The basic structure thereof will be described with reference to FIG. Reference numeral 101 denotes two circular saws, which are rotatably attached to the tip of an arm 102, and are rotated at high speed by a motor or the like. The arm 102 is rotatable around a shaft 103, and is rotated by a motor or the like. Thus, the circular saw 101 revolves while rotating. The log paper R is cut by the circular saw 101 which rotates while revolving. If you use this circular saw without polishing,
Since the cut surface of the log becomes poor and the work efficiency becomes inferior, the circular saw polishing device is incorporated in the log paper cutting device. By the way, in the conventional circular saw polishing apparatus, the front end and the rear end of the rotary shaft are supported by a pair of front and rear bearings, and are rotatably mounted on a holder. A cylindrical grindstone is mounted on one end of the rotary shaft. Have been. The rotating shaft receives air pressure through a diaphragm and presses the grindstone against the circular saw. Therefore, the rear end bearing slides in the holder.
Then, the circular saw of the log cutter comes into contact with the grindstone while rotating, and the grindstone grinds the cutting edge of the circular saw while rotating with the rotating shaft.

[0003]

However, the prior art has the following problems. (1) The bearing at the rear end that supports the rotating shaft slides inside the holder.Sliding means that there is a gap between the bearing and the holder. When the shaft rotates with the grindstone, shaft runout occurs. (2) The rotating shaft that supports the grindstone is heavy, so even if it rotates due to friction with the circular saw, the rise of rotation is slow and uneven rotation occurs. For the above reasons, the cutting edge of the circular saw has uneven polishing, and the log is not always sharp.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a circular saw polishing apparatus of a log paper cutting apparatus which can polish a circular saw blade without waving, and can always maintain the sharpness of the circular saw after polishing. And

[0005]

Means for Solving the Problems] circular saw polishing apparatus log paper cutting apparatus of claim 1, through the holders are used and a support shaft attached to the holder, a bearing at the tip of the support shaft
A holder cylinder made of aluminum which is mounted rotatably Te, a ring-shaped grinding wheel mounted on the holder of the tip portion, the mounting position for adjusting the mounting position of the holder
Location adjustment mechanism and Ri Do from the holder, the shaft the support shaft
A ball spline bearing that supports slidably in
Presses and biases the spindle in the direction of contact with the circular saw to be polished
And a spring for holding the spring.
The urging force is transmitted to the support shaft, and the urging force of the spring is
Piston with piston surface receiving pitted air pressure
And sealing the grinding wheel side end surface of the bearing.
A cap, and the mounting position adjusting mechanism includes a cap.
A base and a rotatable support
Adjustment bolt having a male screw portion, and male screw of the adjustment bolt
It has a long female screw part to be screwed to the part, and the mounting base
Non-rotatably and slidably fitted and connected to the holder
Of the moving spline shaft and the moving spline shaft
And a cap for sealing the whetstone side end .

According to the first aspect of the present invention, the support shaft does not rotate, and the rotating shaft is a lightweight aluminum holding table and a small ring-shaped grindstone, and the rotating portion has a small mass. Therefore, the rising speed of the rotation is fast, the rotation unevenness of the grindstone due to the fluctuation of the frictional force with the circular saw hardly occurs, and the grinding can always be performed without waving the cutting edge of the circular saw. Further, since the main shaft is held by the ball spline bearing, no run-out occurs in the radial direction, and no rotational vibration occurs on the ring-shaped grindstone at the front end of the main shaft. On the other hand, the main shaft is moved by a light force in the axial direction by a ball spline bearing, and is urged by a spring in a direction of pressing the grindstone against the circular saw, so that the grindstone always contacts the circular saw with a uniform pressure. Therefore, the circular saw can be polished without waving. Furthermore, by rotating the adjusting bolt in both the forward and reverse directions, the moving spline shaft can be moved in the forward and backward directions, and the holder holding the grinding wheel can also be moved in the forward and backward directions. Can be set to a position where an appropriate biasing force can be obtained. Since the bearing that rotatably supports the holding table is sealed at the grinding wheel side end with a cap, rotation failure due to mixing of cutting powder does not occur, and the grinding wheel side end of the moving spline shaft is also sealed with the cap. Therefore, there is no occurrence of a movement failure for mixing the cutting powder.

[0007]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing a main part of a circular saw polishing device of a log paper cutting device according to a first embodiment of the present invention. 2A is a front view of the ball spline bearing in FIG. 1, and FIG. 2B is a partial cross-sectional side view of the ball spline bearing.

In FIG. 1, reference numeral 11 denotes a non-rotating support shaft which is movable in the axial direction (however, it may be rotated). At the tip of the support shaft 11, a cylindrical holding base 13 is rotatably mounted via a bearing 12 and a mounting tube 12a. The holder 13 is preferably a light weight so that the rotational mass is small for reasons to be described later, A Ruminiu
Beam materials have been used. In this example, for the purpose of weight reduction, a cylindrical holding base 13 having one end face closed is used, and the center of the closed surface of the cylindrical holding base 13 is attached so that the mounting cylinder 12a penetrates. Support shaft 13
It is rotatably attached to 11. In the figure, reference numeral 12b denotes a cap 12b for closing the tip of the mounting cylinder 12a in which the bearing 12 is housed. The cap 12b prevents dust and the like from entering the mounting cylinder 12a. And
A ring-shaped (in this example, circular ring-shaped) thin grindstone 14 is integrally fixed to the tip of the holding base 13 by, for example, bonding or other arbitrary means.

The support shaft 11 is, for example, shown in FIGS. 2 (a) and 2 (b).
Spline shaft 23 of ball spline bearing 21 as shown in
Thus, the support shaft 11 is held slidably in the axial direction and non-rotatably. The support shaft 11 may be formed separately from the spline shaft 23 and connected to the tip of the spline shaft 23. The components of the ball spline bearing 21 include a spline shaft 11, a spline outer cylinder 22, a spline shaft.
The spline outer cylinder 22 has a flange 25 attached thereto. The spline shaft 11 held by the spline outer cylinder 22 is slidably and non-rotatably held in the axial direction and moves with a small force in the axial direction, but has no backlash in the radial direction. It has the function of preventing vibration.

Further, the grindstone 14 attached to the holding table 13 at the tip of the support shaft 11 is brought into contact with the cutting edge of the circular saw 54 to be polished (that is, from the base end of the spline shaft 11 to the tip end). (In the direction toward the section). This biasing mechanism is, for example, a ball spline outer cylinder.
22 which is provided on the outer periphery of the spline outer cylinder 22
25, a cylindrical bracket 20, a cylindrical piston 16 housed in the bracket 20, and the spline shaft through an outer end 16 a of the piston 16.
The spring 17 includes a spring 17 for urging the base end face of the spring 11 and a ring-shaped cap 15a attached to a bracket 20 so as to fix an outer end of the spring 17. Reference numeral 18 denotes a packing. The spring 17 is
The support shaft 11 and thus the grindstone 14 are constantly urged in the direction of contact with the circular saw 54.

Further, the bracket 20 has a piston
An air supply port 19 for supplying air pressure from the outside is provided on an inner end piston surface 16b of the piston 16 so as to dig against the urging force of the spring 17. Thereby, by supplying air pressure of a desired pressure to the piston surface 16b of the piston 16 from the outside, the piston 16 compresses the spring 17,
The support shaft 11 and, consequently, the grindstone 14 can be retracted.

A holder position adjusting mechanism is provided for adjusting the relative position between the bracket 20 and the cutting edge of the circular saw 54, in other words, the relative position between the grindstone 14 and the cutting edge of the circular saw 54. FIG. 3 is a side view showing a part of the holder position adjusting mechanism in a longitudinal section. In this holder position adjusting mechanism, reference numeral 31 denotes a mounting base fixed to the main body of the log paper cutting device. Reference numeral 32 denotes an adjusting bolt having a long male screw portion, which is rotatably supported by the mounting base 31. Reference numeral 33 denotes a moving spline shaft having a long female screw portion screwed into the male screw portion of the adjusting bolt 32, and is fitted non-rotatably and slidably on a spline bearing 34 mounted on the mounting base 31. Has been inserted. The other end of the moving spline shaft 33 is closed by a cap 35.
The moving spline shaft 33 is connected to the bracket
The holder 20 is fixedly attached to one end of the holder 20 so that the holder 20 moves integrally in the front-rear direction in accordance with the movement of the moving spline shaft 33 in the front-rear direction accompanying the left-right rotation adjustment of the adjustment bolt 32. Has become.

FIG. 4 is a side view schematically showing the positional relationship of the circular saw polishing apparatus with respect to the cutting edge of the circular saw. FIG. 5 is a side view schematically showing the log paper cutting device of FIG.

4 and 5, the arm 51 is rotatable in a vertical plane by rotating a shaft 52 provided at the center thereof in a horizontal direction by a motor or the like. Two circular saws 54 are attached to a shaft 53 rotatably held at both ends (ends) of the arm 51, respectively. The two circular saws 54 are rotated at a high speed by a motor or the like. The circular saws 54 can rotate (rotate) at high speed in a vertical plane. Therefore, two circular saws
The wheels 54 rotate in the vertical plane while rotating (revolving) by the arms 51, respectively. Then, for example, in a state where the two log papers R placed in parallel on the belt conveyor 55 are extruded in the horizontal direction and are clamped by the clamps below the circular saw 54, the circles revolve while revolving as described above. The operation of cutting into a fixed length by the saw 54 is sequentially repeated.

The above-mentioned circular saw polishing apparatus is provided for each of two circular saws, and two circular saws are provided.
4 and 14 are arranged on the front side and the back side of one circular saw 54, and the tip surface of the grindstone 14 contacts the side surface of the cutting edge of the circular saw 54 away from the log paper cutting position in an oblique direction. Are arranged to obtain. Then, before cutting the log paper, the holder position adjusting mechanism of the circular saw polishing device is operated so that the tip end surface of the grindstone 14 of the circular saw polishing device contacts the side surface of the cutting edge of the rotating circular saw. Before cutting the log paper, supply air to the air supply port 19 to
14 is retracted, and when the cutting operation is started, air is released and the grinding stone 14 is brought into contact with the circular saw 54 by the biasing force of the spring 17,
The edge of the circular saw 14 is polished from both front and back.

At this time, the support shaft 11 does not rotate, but only the light aluminum holding table 13, the small ring-shaped grindstone 14 and the mounting cylinder 12a rotate, and the mass of the rotating portion is small. Therefore, since the rotation rises quickly and partial polishing does not occur, the cutting edge of the circular saw 54 can be uniformly polished. Also, the frictional force between the grindstone 14 and the circular saw is less fluctuated, the rotation of the grindstone 14 is less likely to be uneven, and the circular saw blade 10 can always be polished without waving. Further, the support shaft 11 is a spline bearing 21
Since there is no radial clearance with respect to the outer cylinder 22, the grindstone 14 also rotates concentrically, and the ring-shaped grindstone 14 does not shake. The support shaft 11 is held by a spline bearing 21 and moves with a light force in the axial direction.
Since the grindstone 14 is urged by the 17 in the direction of pressing the grindstone 54 against the circular saw 54, the grindstone 14 always contacts the circular saw 54 with a uniform pressure.
Therefore, the edge of the circular saw 54 can be polished without waving.

Further, in this embodiment, by rotating the adjusting bolt 32 of the holder position adjusting mechanism in both forward and reverse directions, the moving spline shaft 33 can be moved in the front-rear direction, and the bracket 20 is also moved. Can be done. Therefore, the grindstone 14 can be set at a position where a proper biasing force can be obtained with respect to the circular saw 54. In addition, the structure in which the other end of the moving spline shaft 33 in which the adjusting bolt 32 is inserted is closed, so that dust or the like does not easily enter the inside of the moving nut 33, so that fine cutting is performed along with log cutting. It can be used without the need for special maintenance even in an environment where powder flutters.

[0018]

According to the first aspect of the present invention, the supporting shaft does not rotate, and the rotating shaft is a lightweight aluminum holding base and a small ring-shaped grindstone, and the rotating portion has a small mass. Therefore, the rising speed of the rotation is fast, the rotation unevenness of the grindstone due to the fluctuation of the frictional force with the circular saw hardly occurs, and the grinding can always be performed without waving the cutting edge of the circular saw. Further, the main shaft is because it is held by the ball spline bearing, does not occur at all runout in the radial direction, the rotation shake does not occur in the ring-shaped grindstone spindle tip. On the other hand, the main shaft is moved by a light force in the axial direction by a ball spline bearing, and is urged by a spring in a direction of pressing the grindstone against the circular saw. Therefore, the circular saw can be polished without waving. Furthermore , by rotating the adjusting bolt in both the forward and reverse directions, the moving spline shaft can be moved in the forward and backward directions, and the holder holding the grinding wheel can also be moved in the forward and backward directions. Can be set to a position where an appropriate biasing force can be obtained. And
The bearing that rotatably supports the holder has a
Rotation due to mixing of cutting powder because it is sealed with a cap
No defects occur, and the end of the moving spline shaft on the grindstone side is also
Since it is sealed with a tip,
Goodness never occurs.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a main part of a circular saw polishing device of a log paper cutting device according to a first embodiment of the present invention.

2A is a front view of the ball spline bearing in FIG. 1, and FIG. 2B is a partial cross-sectional side view of the ball spline bearing.

FIG. 3 is a side view showing a part of the holder position adjusting mechanism in a longitudinal section.

FIG. 4 is a side view schematically showing an arrangement relationship of a circular saw polishing device with respect to a blade edge of the circular saw.

FIG. 5 is a side view schematically showing the log paper cutting device of FIG. 4;

FIG. 6 is an explanatory diagram showing a basic structure of a conventional log-paper cutting apparatus.

[Explanation of symbols]

 11 Support shaft 12 Bearing 13 Holder 14 Grinding stone 16 Piston 17 Spring 20 Bracket 21 Spline bearing 22 Spline outer cylinder 25 Flange 31 Mounting base 32 Adjustment bolt 33 Moving spline shaft

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-59-232794 (JP, A) JP-A-54-77391 (JP, A) JP-A-49-128383 (JP, A) JP-A 57- 107795 (JP, A) JP-A-55-144989 (JP, A) JP-A-5-345263 (JP, A) JP-A-5-337882 (JP, A) Japanese Utility Model Publication No. 53-29887 (JP, U) Japanese Utility Model Showa 51-56691 (JP, U) Japanese Utility Model Showa 61-140994 (JP, U) Japanese Utility Model Showa 54-116991 (JP, U) Japanese Utility Model Showa 41-7511 (JP, Y1) (58) (Int.Cl. ⁷ , DB name) B24B 3/36 B24B 3/46 B26D 1/16 B26D 7/12

Claims (1)

(57) [Claims] 1. A E Ruda and a support shaft attached to the holder, a rotatable cylindrical aluminum mounted holder through a bearing on the front end of the support shaft, said holder tip Ring-shaped grindstone attached to the part, and mounting position adjustment for adjusting the mounting position of the holder
Ri Do and a mechanism, the holder, ball spline for supporting the shaft axially slidably
Press the bearing and the support shaft in the direction that comes into contact with the circular saw that is the object to be polished.
A spring for biasing, transmitting a biasing force to the support shaft while holding the spring,
And receives the air pressure to dig against the urging force of the spring
A piston having a piston surface, comprising a cap for sealing the grinding wheel side end surface of the bearing.
The mounting position adjusting mechanism includes a mounting base and a long male screw portion rotatably supported by the mounting base.
And an elongated female screw part to be screwed into the male screw part of the adjustment bolt.
And is fitted non-rotatably and slidably into the mounting base.
A moving spline shaft connected to the holder, and a cap for sealing a whetstone side end of the moving spline shaft.
Circular saw polishing apparatus log paper cutting apparatus characterized by comprising a.