JPH09220456A - Latch device in closed kneader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the wear of a latch and a drop door to make a wear member have long life and to miniaturize a latch device and to surely perform clamp actuation by interposing between a latch and a drop door an intermediate member freely slidable in the inclined direction of the inclined surfaces of the latch and the drop door. SOLUTION: In a latch device 9 in a closed kneader, a lubricating shuttle member 20 (intermediate part) is supported so as to make it freely slidable by an inclined surface 11a of a latch 11 of the latch device 9, and the shuttle member 20 is interposed between the latch 11 and a drop door 2 during clamp actuation. And at the beginning of clamp actuation of the drop door 2 by the latch 11, first the intermediate member 20 is pressed against the inclined surface of the drop door 2 to generate large static friction between them, and while static friction between the inclined surface of the latch 11 and the intermediate member 20 is reduced by it, only the latch 11 is slid and pressed against the drop door 2 side to perform clamping. Therefore, friction between the latch 11 and the drop door 2 is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a closed-type kneading machine in which the kneaded material is discharged by opening and closing a drop door forming a part of a kneading chamber, and particularly, the drop door is pressed and clamped. The present invention relates to a latch device that ensures airtightness in a kneading chamber.

[0002]

2. Description of the Related Art A latch device 9 in a conventional kneading machine X for kneading rubber or the like is shown in FIG. 7 and will be described below. In FIG. 7, 1 is a kneading chamber of the closed kneading machine X, 2 is a drop door, 3 is a discharge port, 4 is a rotor, 11 is a latch of the latch device 9, 12 is a floating weight, and 14 is a supply port.

The kneading chamber 1 has a floating weight 12
And a door top 2a of the drop door 2 form a cylindrical closed space that is two circles whose cross-sections communicate laterally, and two rotating kneading rotors 4 are arranged in the cylindrical closed space. ing. Each of the kneading rotors 4 is supported by opening portions for supporting rotors on both end surfaces of the kneading chamber 1 (not shown) and is housed in the kneading chamber 1. The kneading rotor 4 rotates so as to sweep the inner wall of the kneading chamber 1. The kneading material is kneaded into the kneading chamber 1 when the floating weight 12 is moved up and down through the supply port 14 of the above-mentioned step.

The drop door 2 is a discharge port 3 extending in the axial direction of the kneading rotor 4 at the bottom of the kneading chamber 1 when kneading materials.
Is closed by the door top 2b so that the material can be kneaded by the kneading rotor 4, and after the material is kneaded, the material can be discharged by opening downward so as to rotate downward around the fulcrum 2c. The opening and closing of the drop door 2 is performed by a drop door control circuit of a hydraulic control device (not shown).

A latch 11 of the latch device 9 is movable (slides) with respect to the drop door 2 by a hydraulic cylinder 10 of the latch device 9. And the latch 11
Is pushed into the drop door 2 side by the hydraulic cylinder 10 and presses the inclined surface 11a against the inclined surface 2a of the drop door 2 so that the drop door 2 is pushed up to the kneading chamber 1 side and the inside of the kneading chamber 1 during material kneading After the material is kneaded, it is retracted from the drop door 2 side by the hydraulic cylinder 10 so that the drop door 2 can be opened (clamp release).

By the way, as described above, the clamp operation of the drop door 2 by the latch 11 of the latch device 9 is performed by directly contacting the inclined surfaces 11a and 2a, so that the drop door 2 is operated by the latch 11. At the final stage of clamping 2 (when the inclined surface 11a of the latch 11 abuts the inclined surface 2a of the drop door 2 almost entirely), small dynamic friction acts between the inclined surfaces 11a and 2a. At the beginning of the clamp (when the inclined surface 11a of the latch 11 starts to contact the inclined surface 2a of the drop door 2), each inclined surface 11
A large static friction acts between a and 2a.

Therefore, the drop door 2 by the latch 11
When the clamp operation of is repeated, each inclined surface 11
a and 2a are abraded by each friction generated, and the function of pushing up the drop door 23 to the kneading chamber 1 side to keep the airtightness inside the kneading chamber 1 is impaired, and the material kneaded in the kneading chamber 1 is damaged by the internal pressure. There was a risk of leakage to the outside. Therefore, it is necessary to replace or repair the worn latch 11 and the drop door 2 itself frequently and frequently. Further, as described above, in order to prevent the clamp operation from being stopped due to the large static friction generated between the inclined surfaces 11a and 2a during the clamp operation, it is necessary to increase the operation force for pressing the latch 11 against the drop door 2. As a result, there is a latch device 9 such as a hydraulic cylinder 10 for moving the latch 11 forward and backward.
Was getting bigger.

[0008]

In order to solve such a problem, as shown in FIG. 8, the drop door 2 is provided with a contact plate 16 which is replaceably attached by a bolt or the like, and the latch 11 is inclined. The one in which the surface 11a is brought into contact with the plate inclined surface 16a of the contact plate 16 to clamp the drop door 2 has been put into practical use. Instead of replacing the drop door 2 as a whole, only the worn contact plate 16 can be easily replaced. It is intended to be replaced with. In order to reduce the size of the latch device 9, the contact plate 16 of the latch 11 or the drop door 2 is covered with a sliding accelerator such as a coating or a lubricant so that the inclined surface 11a of the latch 11 and the contact plate 16 are covered. The friction coefficient with respect to the plate inclined surface 16a of each of the above-mentioned latches 11 is set to the drop door 2
Attempts have also been made to reduce the operating force applied to the.

However, in the structure shown in FIG. 8, when the clamp operation of the drop door 2 by the latch 11 is repeated, the sliding promoting materials of the latch 11 and the contact plate 16 are worn according to the frequency of the clamp operation. The friction between the inclined surface 11a of the latch 11 and the plate inclined surface 16a of the contact plate 16 tends to increase. In particular, since carbon or the like is used in the material to be kneaded in the kneading chamber 1, if the carbo or the like in the material is mixed with the above-mentioned sliding promoting material or other foreign matter is mixed, the clamp operation is rather performed. Latch in 11
The friction coefficient between the inclined surface 11a of the contact plate 16 and the plate inclined surface 16a of the contact plate 16 increases, and seizure or the like tends to occur, resulting in extremely shortened life. In the end, the contact plate 16 is provided to facilitate replacement. Also,
The contact plate 16 needs to be replaced frequently, and improvement has been demanded for reliably performing the clamp operation of the latch device 9.

The latch device in the closed kneading machine of the present invention is made to solve such a problem.
By reducing the wear of the latch and the drop door, it is possible to ensure the clamp operation while extending the life of the wear member and downsizing the latch device.

[0011]

In order to solve the above problems, in a latch device for a closed type kneading machine according to the present invention, in claim 1, an inclined surface of a drop door for discharging a material to be kneaded from a kneading chamber is touched. A latch device for a hermetic kneading machine, comprising: a latch formed with an inclined surface to be contacted, wherein the inclined surface of the latch is pressed against the inclined surface of the drop door to clamp the drop door. An intermediate member slidable in the inclination direction of each of these inclined surfaces is interposed between the door and the door. With this, at the beginning of the clamp operation of the drop door by the latch, first, the intermediate member is pressed against the inclined surface of the drop door, large static friction is generated between them, and the intermediate member is frictionally fixed to the drop door. Clamping can be performed by sliding only the latch and pressing it against the drop door while reducing static friction between the inclined surface of the latch and the intermediate member.

According to a second aspect of the present invention, in the first aspect, the intermediate member is urged in a pressing direction of the latch with respect to the drop door by elastic pressure means. By this, when the clamp of the drop door by the latch is released, by sliding the intermediate member in the pressing direction of the latch by the elastic force of the elastic pressure means, the sliding in the pushing direction of the latch is restored and the next time, It is possible to automatically prepare for the drop door clamp operation by the latch of.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION A latch device in a closed kneading machine according to the present invention will be described below with reference to the drawings. 1 is an enlarged view showing the configuration of a latch device in the hermetic kneading machine of the present invention, FIG. 2 is a view taken in the direction of arrow A in FIG. 1, and FIG.
FIG. 4 is an enlarged view for explaining the operation of the latch device in the hermetic kneader of the present invention, and FIG. 5 is an enlarged view of the configuration of another latch device in the hermetic kneader of the present invention. FIG. 6 is an enlarged view showing a modified example of the latch device in the hermetic kneading machine of the present invention. 1 to 4 of the present invention, the same reference numerals as those in FIGS. 7 and 8 of the prior art have the same configurations, and thus the description thereof will be omitted.

In FIG. 1, the latch device 9 in the hermetic kneading machine X of the present invention is an inclined surface 11 a of this latch 11.
A sliding shuttle member 20 (intermediate member) is slidably supported by the shuttle member 20, and the shuttle member 20 is interposed between the latch 11 and the drop door 2 during the clamp operation. Each friction (dynamic friction or static friction) generated with the drop door 2 is reduced.

The inclined surface 11a of the latch 11 is formed on the bottom of the concave portion 21 which opens at the tip thereof, and extends so as to project toward the drop door 2 toward the tip side. As shown in FIGS. 2 and 3, the recess 21 is formed with guide grooves 22 and 22 on both side surfaces 21a and 21b thereof, and the guide grooves 22 and 22 are parallel to the inclined surface 11a. It extends in the direction of inclination. Further, as shown in FIG. 2, a pair of regulating shaft portions 23, 23 extending toward the discharge port 3 side of the hermetic kneader X project from the inclined surface 11 a of the latch 11, and each regulating shaft portion 23. , 23 are arranged so as to be parallel to each other at a predetermined interval in a direction orthogonal to the inclination direction of the inclined surface 11a and to be parallel to each other.

As shown in FIGS. 2 and 3, the shuttle member 20 is formed in a convex shape in cross section having flanges 24, 24 which are fitted in the respective guide grooves 22, 22 formed in the recess 21 of the latch 11. And the inclined surface 11a of the latch 11
A pair of restricting elongated holes 25, 25 extending in parallel with each other in the direction of inclination are formed. Then, the shuttle member 20 connects the restriction elongated holes 25, 25 to the restriction shaft portions 2 respectively.
3 and 23 are loosely fitted and the collar portions 24 and 24 are fitted into the guide grooves 22 and 22, respectively, so that the slidable inclined surface 20b is brought into contact with the inclined surface 11a of the latch 11 and the slanted direction thereof. It is slidable on each of the restriction slots 25,
The sliding amount is regulated by the contact between 25 and the regulation shaft portions 23, 23. Also, the shuttle member 2
When 0 is slidably arranged in the recess 21 of the latch 11, as shown in FIG. 3, the inclined surface 20a on the upper end side thereof projects outward from the opening of the recess 21 and the inclined surface of the latch 11 It is made to incline parallel to 11a.

The drop door 2 is formed with an inclined surface 2a facing the shuttle member 20 arranged in the latch 11, and the inclined surface 2a is formed on the shuttle member 20.
0a, the slanted surface 11a of the latch 11 extends so as to be parallel.

When the latch 11 is advanced to the drop door 2 side by the hydraulic cylinder 10 in order to clamp the drop door 2, first, as shown in FIG. 4 (a), the inclined surface 20a of the shuttle member 20 is removed. Drop door 2
It contacts the inclined surface 2a of and is pressed. At this time, when the friction coefficient between the inclined surface 20a of the shuttle member 20 and the inclined surface 2a of the drop door 2 becomes abnormally large due to the pressing force of the latch 11 against the drop door 2, the shuttle member 20 causes the inclined surface 2a of the drop door 2 to move. Is fixed by friction.

Then, subsequently, in a state where the frictional fixing of the shuttle member 20 to the drop door 2 is maintained,
As shown in FIG. 4 (b), only the latch 11 is pressed against the drop door 2 side while sliding (sliding) on the sliding inclined surface 20 b of the shaft member 20.
The drop door 2 via the shuttle member 20 into the kneading chamber 1
It is pushed up to the side and strongly clamped (fixed by pressing). At this time, the latch 11 is provided with the restriction shaft portions 23,
It can be pushed into the drop door 2 side until 23 comes into contact with the restriction elongated holes 25, 25 of the shuttle member 20. That is, at the beginning of the clamp operation, the shuttle member 2
By pressing the inclined surface 20a of 0 against the inclined surface 2a of the drop door 2 and by frictionally fixing the shuttle member 20 to the drop door 2 by the large static friction generated between them.
The static friction between the latch 11 and the shuttle member 20 is reduced, and only the latch 11 is slid and pressed against the drop door 2 side to clamp the drop door 2.

Further, when the latch 11 is retracted by the hydraulic cylinder 10 to open the drop door 2 from the state where the clamp of the drop door 2 by the latch 11 is completed,
First, sliding occurs between the sliding inclined surface 20b of the shuttle member 20 frictionally fixed to the inclined surface 2a of the drop door 2 and the inclined surface 11a of the latch 11, so that only the latch 11 slides on the sliding inclined surface of the drop door 20. While sliding (sliding) on 20b, it is retracted so as to be pulled out from the drop door 2 side.

Then, subsequently, the latch 11 slides along the sliding inclined surface 20b of the shuttle member 20 and is retracted so as to be pulled out from the drop door 2 side, and the inclined surface 20a of the shuttle member 20 and the drop door 2 are retracted. Inclined surface 2a
When the static friction with (decreases below the pressing force acting on the latch 11 retracted by the hydraulic cylinder 10), the shuttle member 20 slides on the sloped surface 2a of the drop door 2 along with the latch 11 to slide the drop door. It is pulled out from the 2 side and retracted. As a result, the drop door 2 can be opened (clamp release). At this time, the latch 11 slides until the restriction shaft portions 23, 23 come into contact with the restriction elongated holes 25, 25 of the shuttle member 20 to prepare for the next clamp of the drop door 2 by the latch 11. .

As the latch device 9 in the closed kneading machine X, as shown in FIG. 1, the latch 11 is moved forward and backward (slide) to the drop door 2 by the expansion and contraction of the hydraulic cylinder 10 to clamp the drop door 2. Alternatively, as the other latch device 109, as shown in FIG. 5, the latch 11 connected to the link mechanism 30 provided on the cylinder rod 10A of the hydraulic cylinder 10 is provided around the fulcrum 30a. When the drop door 2 is rotated or turned, the inclined surface 20a of the shuttle member 20 arranged in the latch 11 is brought into contact with the inclined surface 2a of the drop door 2 to crank or drop the drop door 2. In the latch device 109, the latch 11, the shuttle member 20, and the drop door 2 may be the same as those shown in FIG. a) is performed similar operation to that shown in to FIG. 4 (c).

Further, in the latch devices 9 and 109 of the hermetic kneading machine X of the present invention, as shown in FIG. 6A, a spring serving as an elastic pressure means is provided between the shuttle member 20 and the recess 21 of the latch 11. It is preferable to use a member in which 30 is stretched so that the shuttle member 20 is biased (elastically pressed) in the direction in which the latch 11 is pushed by this spring force F (elastic force). With this configuration, when the clamp of the drop door 2 is released, the clamp member 20 is slid to the tip side of the latch 11 by the spring force F (elastic force) of the spring 30.
As shown in FIG. 3, the latch 11 is returned so that it can slide in the pushing direction with respect to the drop door 2, and the next latch 1
It is possible to automatically prepare for the clamp operation of the drop door 2 according to 1.

Further, in the latch devices 9 and 109 of the hermetic kneading machine X of the present invention, the inclined surface 1 of the latch 11 is used.
Although the structure in which the shaft member 20 is slidably supported by 1a has been shown, the present invention is not limited to this, and as shown in FIG. 6 (b), the shaft has the same structure as that shown in FIGS. The member 20 may be slidably supported on the inclined surface 2a of the drop door 2. In this case, the inclined surface 20a of the shuttle member 20 is latched by the latch 1 at the beginning of the clamp operation.
By pressing the shuttle member 20 against the inclined surface 11a of the first and frictionally fixing the shuttle member 20 to the latch 11 by the large static friction generated between them, the drop door 2 and the shuttle member 20
The static friction between and is reduced, and the latch 11 is slid together with the shuttle member 20 and pressed against the drop door 2 side to clamp the drop door 2.

[0025]

As described above, according to the latch device of the hermetic kneading machine of the present invention, in the first aspect, at the beginning of the clamp operation of the drop door by the latch, the intermediate member is first pressed against the inclined surface of the drop door. By generating a large static friction between them, the static friction between the inclined surface of the latch and the intermediate member can be reduced, and only the latch can be slid and pressed against the drop door to perform clamping. It will be possible. Therefore, while reducing the friction generated between the latch and the drop door, the latch can be pressed and clamped to the drop door side, wear of the latch and the drop door is reduced, and their life is improved, In addition, the latch device can be downsized while reducing the operation force for pressing the latch against the drop door. As a result, the drop door can be reliably clamped by the latch, the functional loss of the hermeticity of the kneading chamber due to the wear of the latch and the drop door can be eliminated, and the kneading in the kneading chamber can be reliably performed. Is possible.

According to claim 2, in addition to the effect of claim 1,
When the clamp of the drop door is released, sliding the intermediate member in the pressing direction of the latch by the elastic force of the elastic pressure means allows the sliding of the latch in the pushing direction to be restored, and the drop door by the next latch Can be automatically prepared for the clamp operation.

[Brief description of drawings]

FIG. 1 is an enlarged view showing a configuration of a latch device in a hermetic kneader of the present invention.

FIG. 2 is a view taken in the direction of arrow A in FIG. 1;

FIG. 3 is a sectional view taken along line BB of FIG. 2;

FIG. 4 is an enlarged view for explaining the operation of the latch device in the closed kneading machine of the present invention.

FIG. 5 is an enlarged view showing the configuration of another latch device in the closed kneading machine of the present invention.

FIG. 6 is an enlarged view showing a modified example of the latch device in the closed kneading machine of the present invention.

FIG. 7 is an overall cross-sectional view showing the structure of a conventional kneading machine of a hermetic type.

FIG. 8 is an enlarged view showing a configuration of a closed kneading machine according to a conventional technique.

[Explanation of symbols]

 1 kneading chamber 2 drop door 2a inclined surface 11 latch 11a inclined surface 20 shuttle member (intermediate member)

Continuing on the front page (72) Inventor Isao Takakura 2-3-1, Shinhama, Arai-machi, Takasago City, Hyogo Prefecture Inside Kobe Steel, Ltd. Takasago Works

Claims (2)

[Claims] 1. A latch having a slanted surface for contacting is formed on a slanted surface of a drop door for discharging a material to be kneaded from a kneading chamber, and the slanted surface of the latch is pressed against the slanted surface of the drop door. Thus, in the latch device in the hermetic kneader for clamping the drop door, an intermediate member slidable in the inclination direction of each of the inclined surfaces is interposed between the latch and the drop door. Latch device in a closed kneader. 2. The latch device for a hermetic kneading machine according to claim 1, wherein the intermediate member is biased in a pressing direction of the latch with respect to the drop door by an elastic pressure means.