JPH0144096B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to chopper, and more specifically,
This relates to a support structure for a shaft to which a cutter is attached.

BACKGROUND ART Choppers are used to process raw materials such as fish meat, livestock meat, etc. by grinding, mixing, or granulating them to obtain various products such as pasted products and granular products.

A cutting mechanism consisting of a plate and a cutter, and a screw for feeding the raw material to the cutting mechanism are built into the cutter,
These structures will be explained with reference to FIGS. 8 and 9.

In the drawings, 1 is the body of the chopper, 2 is a screw, 3 is a rotating shaft disposed at the tip of the screw 2, 4 is a plate, 5 is a first cutter, and 6 is a second cutter.

The screw 2 has a spiral 2a formed on its outer periphery, is rotationally driven by a prime mover (not shown), and uses the spiral 2a to force feed the raw material toward the cutting mechanism.

The rotating shaft 3 includes, from the base end side, a first square body portion 3a,
A cylindrical portion 3b, a second square body portion 3c, and a male thread portion 3d are formed.

The plate 4 has a predetermined shape and number of small-diameter through holes 4a, 4a, .

The first cutter 5 is, for example, a cross-shaped four-blade cutter as shown in the figure, and has a square hole 5a bored in the center thereof into which the first square body 3a can fit.

The second cutter 6 is, for example, a two-blade cutter having a shape as shown in the figure, and has a square hole 6a bored in the center thereof into which the second square body 3c can fit.

The rotating shaft 3, the plate 4, and the first and second cutters 5, 6 are assembled into the body 1 in the following manner.

First, the first cutter 5 is attached to the first square body 3a of the rotating shaft 3.
The square hole 5a is fitted.

Next, with the plate 4 engaged with a detent key (not shown) formed on the body 1, the cylindrical portion 3b and the round hole 4b are fitted.

Next, the square hole 6a of the second knife 6 is fitted into the second square body 3c protruding from the plate 4.

After that, the plate 4 is fixed by screwing the tightening ring 7 onto the body 1, and the first cutter 5 and the second cutter 6 are fixed to the rotating shaft 3 by screwing the nut 8 into the male threaded portion 3d. .

The chopper feeds the raw materials supplied into the body 1 from the hopper (not shown) toward the first cutter 5 by means of the screw 2, and cuts the raw materials by the first cutter 5 while cutting the raw materials into the body 1.
The raw material is pushed into the through holes 4a, 4a, .

Problems to be Solved by the Invention By the way, the above-mentioned chopper had the following problems.

First, the cylindrical portion 3b of the rotary shaft 3 supported by the plate 4 has a smaller diameter than the base end portion of the rotary shaft 3, and the plate 4 and the first cutter 5
Since various thicknesses are used, the contact area between the round hole 4b of the plate 4 and the cylindrical portion 3b of the rotating shaft 3 is small, and therefore the supporting strength of the rotating shaft 3 is low.

Second, the plate 4, the first and second cutters 5,
It is necessary to use an appropriate type of 6 depending on the purpose of processing or the raw material to be processed. Since they are integrally formed, the degree of freedom in selecting the plate 4 and the first and second cutters 5 and 6 is narrow.

Thirdly, the rotating shaft 3 has the first and second
Since the square body parts 3a, 3c, the cylindrical part 3b, and the male thread part 3d are formed, the processing cost is high, and it is difficult to change the number of plates and the number of cutters as appropriate.

Note that the cutter described in Japanese Utility Model Publication No. 19589/1989 also has a low support strength for the rotating shaft, and the cutting mechanism consisting of the plate and cutter is assembled through a single holding ring that has holding surfaces on the outer periphery and the center. It has a structure in which it is tightened with a cap, and there is a problem in terms of assembly accuracy.

Means for Solving the Problems The present invention has been made in view of the above problems.
A rotating shaft integrally connected to a screw for feeding raw materials, a porous plate that rotatably supports the rotating shaft with a shaft hole in the center, and a porous plate that is locked to the rotating shaft and slides into contact with the porous plate. In the cutter, the cutter is housed in the body and rotates integrally with the rotating shaft in a state in which the rotating shaft is formed to have approximately the same diameter as the shaft hole of the porous plate, and the same cross-sectional shape in the axial direction. The cutter has a cutout surface formed on its outer periphery, and the cutter has a through hole formed in the center thereof corresponding to the cross-sectional shape of the rotating shaft, and the shaft hole of the porous plate is fitted onto the rotating shaft. It is a chiyotsupa that covers the space created when doing so with a tongue piece.

Effect: Due to the above-mentioned structure, the cutter according to the present invention has the following features:
The rotary shaft is slidably supported on the entire circumferential surface of the shaft hole of the plate, and the engagement between the notch surface and the cutter prevents the cutter from rotating relative to the rotary shaft, thereby transmitting rotational driving force to the cutter. In addition, the space created between the shaft hole of the plate and the rotating shaft is covered with a tongue piece to improve support strength and prevent uncut raw material from flowing out to the front surface of the plate from this space.

Embodiment FIGS. 1 to 7 show an embodiment of a chopper according to the present invention, which is of a type for producing granular products.

In the drawing, 10 is the body of Chiyotsupa, 11
is a screw, 12 is a rotating shaft, 13 is a plate,
14 is a first cutter, 15 is a second cutter, 16 is a bushing, 17 is a disc spring, 18 is a spring holder, 19
indicates a spacer, and 20 indicates a tightening ring.

The rotating shaft 12 has cutout surfaces 12a, 12a on both side surfaces that are parallel to each other, and the cross-sectional shape is the same from the base end to the distal end. A threaded portion 12b for screwing onto the screw 11 is formed at the base end of the rotating shaft 12, and a threaded hole 12c is formed in the distal end surface in the axial direction.
is screwed on. Further, in the parallel surface near the tip, the screw hole 12c is provided in the diametrical direction of the rotating shaft 12.
A through hole 12d is formed which communicates with the through hole 12d. The through hole 12d of the rotating shaft 12 is inserted into the rotating shaft 1 during disassembly.
2 and as a hook when pulling out the screw 11 from inside the body 10.
It is used as a discharge hole when removing foreign matter that has entered the hole 2c.

The plate 13 has the rotating shaft 12 at its center.
It has a circular shaft hole 13a into which the
A predetermined shape and number of small diameter through holes 13b, 13b...
is formed.

The first cutter 14 is a substantially cross-shaped four-blade cutter as shown in FIG. 3, and a through hole 14a corresponding to the cross-sectional shape of the rotating shaft 12 is formed in the boss portion. The four blades 14 of the first cutter 14
b, 14b... are formed in the radial direction from the boss portion, with the edge on the rotation direction side being the front edge,
The rear edge side is formed tangentially from the boss portion, and the front edge side is a cutting edge 14c.

The second cutter 15 is, as shown in FIG.
It has a planar shape that has a substantially front and back relationship with the first cutter 14, and is formed thinner than the first cutter 14. Similarly to the first cutter 14, the second cutter 15 also has a through hole 15a formed in the center thereof corresponding to the cross-sectional shape of the rotating shaft 12.

The bushing 16, as shown in FIG.
A flange 16b formed with a through hole 16a through which the rotating shaft 12 can be inserted, and fan-shaped tongue pieces 16c, 1 protruding along the opposing strings of the through hole 16a.
6c, and these tongues 16c, 16c are integrated with the rotating shaft 12 to form a cylindrical surface when the bushing 16 is fitted onto the rotating shaft 12. Further, the thickness of the flange portion 16b is made to substantially match the height difference between the cutting edge 14c of the corresponding cutter, that is, the first cutter 14, and the center portion.

The spring holder 18 has a center screw insertion hole 18a, and a counterbore 18b is formed on the back side so as to fit with the tip of the rotating shaft 12. It is set larger than the spring 17.

The chopper cutting device having the above structure is attached to the fuselage in the following manner.

First, the rotary shaft 12 is screwed and fixed to the tip of the screw 11, and then the first cutter 14 is inserted into the rotary shaft 12.

Next, the bushing 16 is fitted onto the rotating shaft 12 with the flange portion 16b facing the first cutter 14, and then the plate 14 is fitted. In this state, the tongue pieces 16c, 16c of the bushing 16 are
A cylindrical surface is formed in series with the circular arc surface of the rotating shaft 12, and this cylindrical surface is connected to the shaft hole 13 of the plate 13.
supported by a. In addition, the plate 14
Rotation is prevented by fitting a key groove 13c formed on the outer periphery with a key 10a formed inside the body 10.

Next, after fitting the spacer 19 into the body 10, the tightening ring 20 is screwed onto the outer periphery of the body 10, and the outer periphery of the plate 13 is pressed through the spacer 19, thereby connecting the first cutter 14 and the plate 13. Press them together with the specified pressure.

Next, the second cutter 15 is fitted onto the rotating shaft 12 protruding from the plate 13.

After this, a predetermined number of disc springs 17 are inserted into the rotating shaft 12 with each one turned upside down, and the spring presser 18 is screwed into the mounting bolt 21 into the screw hole 12c of the rotating shaft 12. Therefore, it is fixed to the tip of the rotating shaft 12. In this state, the first and second
The cutters 14 and 15 are cutout surfaces 12 of the rotating shaft 12.
It is prevented from rotating by a and 12a, and rotates integrally with the screw 11 and rotating shaft 12. Further, the disc springs 17, 17, . . . are compressed between the second cutter 15 and the spring presser 18, and press the second cutter 15 toward the plate 13 by elastic restoring force.

The operation of the chipper having the above configuration will be explained below.

First, raw materials are fed into the body 10 from a hopper (not shown) as in the conventional case, and the raw materials are stirred by the screw 11 and passed through the first cutter 14.
will be sent to.

The raw material fed toward the first cutter 14 is further stirred by the blade portions 14b, 14b... back of the first cutter 14, and then
Through holes 13 of plate 13 by c, 14c...
The through hole 13 is cut at the entrance of b, 13b...
b, 13b... is pushed inside.

In the process of cutting the raw material with the first cutter 14, the space between the notch surfaces 12a, 12a of the rotary shaft 12 and the shaft hole 13a of the plate 13 and between the shaft hole 13a of the plate 13 and the first cutter 14 is Since it is covered by the tongue piece 16c of the bushing 16, uncut raw materials are prevented from flowing out to the front side of the plate 13 through the space, and the cutting edge of the first cutter 14 is prevented from flowing out to the front side of the plate 13. 14c,
14c are formed substantially in the radial direction as described above, so that no radial force is applied to the raw material being cut, and the raw material is uniformly cut only by the circumferential force.

The raw material pushed into the through holes 13a, 13a... of the plate 13 is
a... is compressed while passing through the through holes 13a, 1.
3a..., they are sequentially cut into particles by the second cutter 15. By the way, in the process of cutting the raw material by the second cutter 15, as in the case of the first cutter 14 described above, the cutting blades 15c,
15c... are formed approximately in the radial direction, so no radial force acts on the raw material being cut, and the raw material is uniformly cut only by the circumferential force. The length becomes uniform.

The functions of the above chopper will be explained below.

In the chopper described above, since the rotating shaft 12 is slidably supported on the entire surface of the shaft hole 13a of the plate 13, the supporting strength of the rotating shaft 12 is high, and since the rotating shaft 12 has the same cross-sectional shape over its entire length, The thickness and number of plates and cutters can be changed as appropriate to easily accommodate changes in the purpose of use of the chopper.

Furthermore, in the cutter described above, the second cutter 15 is always pressed toward the plate 13 by a predetermined number of disc springs 17 that are compressed and interposed between the second cutter 15 and the spring holder 18 at the tip of the rotating shaft 12. ,
Even if the cutting blades 15c, 15c, . . . of the second cutter 15 are worn out, play can be prevented from occurring between the second cutter 15 and the plate 13.

In addition, the above-mentioned cutter has a bushing 16 that prevents uncut raw materials from flowing out to the plate surface side.
It is not necessary to separate the cutter from the cutter, and the tongue pieces 16c' and 16c' may be integrally formed on the back surface of the cutter 14' as shown in FIGS. 6 and 7.

Furthermore, the present invention can be effectively applied not only to chopper types that produce granular products but also to chopper types that produce dough products, powdered products, and the like.

Effects of the Invention As explained above, in the chopper according to the present invention, since the rotating shaft is slidably supported on the entire circumferential surface of the shaft hole of the plate, the supporting strength of the rotating shaft is high, and the rotating shaft is supported over the entire length. Since they have the same cross-sectional shape, it is easy to attach and remove the plates and cutters, and the number and thickness of the plates and cutters can be changed as appropriate, making it easy to adapt to changes in the intended use of the chopper. Although it exhibits the same characteristics, it can be manufactured at low cost, and extremely practical choppers can be supplied at low cost. Furthermore, since the space created between the shaft hole of the plate and the rotating shaft is covered with the tongue piece, supporting strength is improved and uncut raw material is prevented from flowing out from the space.

[Brief explanation of drawings]

1 to 7 show an embodiment of the chopper according to the present invention, in which FIG. 1 is a longitudinal sectional side view of the main parts, FIG. 2 is an exploded perspective view of FIG. 1, and FIG. 3 is an exploded perspective view of the main part. 1
A plan view of the katsuta, Figure 4 is a plan view of the second katsuta,
Figure 5 is a plan view of the bushing, Figures 6 and 7.
The figures are a bottom view and a side view showing a modified example of the cutter. 8 and 9 show an example of a conventional chopper, with FIG. 8 being an exploded perspective view and FIG. 9 being a longitudinal sectional side view of the main part. 10... Chiyotsupa's body, 11... Screw,
12...Rotating shaft, 12a...Notch surface, 13...Plate (porous plate), 13a...Shaft hole, 14...First
Cuttle, 14a...Through hole, 15...Second cutlet, 1
5a... Through hole, 16... Bushing, 16c... Tongue piece, 17... Belleville spring, 18... Spring retainer, 21... Mounting bolt.

Claims (1)

[Scope of Claims] 1. A rotating shaft integrally connected to a screw for feeding raw materials, a porous plate that rotatably supports the rotating shaft through a shaft hole in the center, and a rotary plate that is latched to the rotating shaft. In the cutter, the cutter is housed in a body and rotates integrally with the rotating shaft while being in sliding contact with the perforated plate, wherein the rotating shaft is formed to have approximately the same diameter as the shaft hole of the perforated plate, and The cutter has a cutout surface formed on the outer periphery so as to have the same cross-sectional shape in the axial direction. A chopper characterized by a tongue piece covering the space created when the shaft hole of the plate is fitted.