JP2011156797A - Kneader with floating weight elevating/lowering guide apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a kneader with a floating weight elevating/lowering guide apparatus, the kneader enabling a floating weight to be smoothly elevated and lowered by regulating the inclination of a ram shaft and being easily disassembled. <P>SOLUTION: The kneader with the floating weight elevating/lowering guide apparatus includes the floating weight 18 which is elevated and lowered and serves as a pressing member of a kneading chamber 10 in a kneading machine, the ram shaft 36 connected to the floating weight 18 and extending to the elevating/lowering direction, a top beam 34 orthogonally connected to the upper end of the ram shaft 36, piston rods 32 of a pair of hydraulic cylinders 30 which are respectively connected to both end parts of the top bean 34 and a pair of guide rods 50 which are provided to be erected in the machine body of the kneading machine and guides the top beam 34 which is elevated and lowered. The piston rod 32 and the top beam 34 are connected to each other with a pin. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a kneader equipped with a floating weight lifting guide device that moves up and down while guiding a floating weight in a sealed kneader, and more particularly, a hopper into which a floating material connected to a hydraulic cylinder is charged with a material to be kneaded. The present invention relates to a kneader equipped with a floating weight raising / lowering guide device capable of smoothly raising and lowering a floating weight when raising and lowering the inside.

In a sealed kneader, kneading is performed while acting a weight (floating weight) on a material to be kneaded in a kneading chamber. In such a sealed kneader, the floating weight is raised. After the material to be kneaded is put into the kneading chamber in this state, a floating weight lifting mechanism is provided for lowering the floating weight and performing kneading.
As a mechanism for raising and lowering the floating weight, a mechanism using a pneumatic cylinder is conventionally known (Patent Document 1). However, a mechanism using a pneumatic cylinder releases a large amount of air when the floating weight is raised and lowered. There are problems such as large energy loss.

In order to solve this problem, a sealed kneader using a hydraulic cylinder instead of a pneumatic cylinder mechanism has been proposed (Patent Document 2).
However, since the proposed kneader has a structure in which the floating weight is raised and lowered by raising and lowering one hydraulic cylinder arranged immediately above the kneading chamber, if there is oil leakage from the cylinder, it will be in the kneading chamber. In addition to the possibility of entering, there is still room for improvement in that it has a complicated structure in which air cylinders are juxtaposed around the hydraulic cylinder, and costs for maintenance are also increased.

On the other hand, there has also been proposed a weight device for a sealed kneader in which the above problem is solved by disposing no hydraulic cylinder directly above the kneading chamber (Patent Document 3).
FIG. 5A is a front view showing a main part of the weight device, and FIG. 5B is an enlarged view of a connecting portion between the connecting beam and the piston rod. The weight device includes a floating weight 106 that is lifted and lowered toward a kneading chamber of a kneading machine body, a stem 113 that is connected to the floating weight 106 and extends in the raising and lowering direction of the floating weight 106, A connecting beam 114 that is integrated at the upper end and forms a T-shape with the stem 113, and both ends of the connecting beam 114 that are equidistant from the center of the stem 113, are arranged parallel to the floating weight 106. And a pair of hydraulic cylinders 115 fixed to the kneading machine main body, and the stem 113 is slidably guided by a guide bush 112 mounted on the kneading machine main body with a gap. The hydraulic cylinder 115 is connected to the center of the stem 113. The connecting means 130 disposed at both ends of the connecting beam 114 that are equidistant from each other allows movement beyond the gap of the guide bush 112 only in the horizontal direction orthogonal to the direction in which the stem 113 extends, to allow the connecting beam 114 to move. Connected to both ends.

  The connecting means 130 used here is similarly cylindrical and liquid in the stepped portion of the stepped hole 133 (134, 135) of the cylindrical first connecting member 131 fixed to both ends of the connecting beam 114. The rod 119 tip of the pressure cylinder 115 is configured to be engaged with the flange 138 of the second connecting member 132 inserted and fixed. A tubular gap 139 is formed between both cylindrical portions, and the first connecting member 131 is The second connecting member 132 is slid (shifted) in the horizontal direction.

That is, this weight device uses a hydraulic cylinder 115 and a connecting beam (top beam) to form a clearance t ₁ between the stem 113 of the guide bush 112 fitted in the central cylindrical portion 116A of the lid body 116 that closes the upper end of the hopper 111. ) By making it larger than the gap T between 114 and the connecting means 130, the connecting beam 114 and the stem 113 are forcibly kept in a T-shaped shape even when the hydraulic cylinders 115 are operated without being synchronized. By doing so, the stem 113 does not tilt, and the guide member is prevented from being abnormally worn. Further, the horizontal movement of the connecting beam 114 or each hydraulic cylinder 115 prevents each hydraulic cylinder 115 from moving or damages to the components of each hydraulic cylinder 115 to prevent each hydraulic pressure from being generated. It is said that the cylinder can be operated smoothly.

However, since the structure of the connecting portion between the connecting beam 114 and the hydraulic cylinder 115 is complicated as described above, it takes time to disassemble the weight device of this sealed kneader for repair or maintenance. Therefore, there is a problem that the cost is still high and repairs are time consuming.
In actuality, when the grease accommodated between the first and second connecting means 131 and 132 decreases, the floating weight 106 moves in the horizontal direction, so that the sliding portion is worn, and the stem 113 is inclined. In extreme cases, the stem 113 may be broken. Even if the grease does not decrease, wear occurs in the sliding portion, and the same problem may occur if the wear progresses.

JP-A-57-7238 JP 63-17008 A Japanese Patent Laid-Open No. 10-211161

  The present invention has been made to solve the above-mentioned conventional problems, and its purpose is to reliably regulate the inclination of a shaft member (ram shaft) in a sealed kneader using a hydraulic cylinder. The floating weight can be moved up and down smoothly, and it is easy to disassemble and reduce the maintenance cost.

  The present invention includes a floating weight that serves as a pressing member for a kneading chamber that is raised and lowered in a kneading machine, a shaft member that is connected to the floating weight and extends in the raising and lowering direction, and a central portion that is orthogonally connected to the upper end of the shaft member. A pair of hydraulic cylinders connected to both ends of the top beam, and a pair of guide members for guiding the top beam that is erected and lifted up and down on the body of the kneader. The hydraulic cylinder drive unit and the top beam are connected by a pin. The kneading machine includes a floating weight lifting guide device.

  According to the present invention, the floating weight can be smoothly raised and lowered by regulating the inclination of the ram shaft. Therefore, the maintenance cost can be reduced without causing problems such as breakage of the ram shaft and because it is easy to disassemble.

FIG. 1A is a front view of a floating weight lifting guide device of a kneader according to the present embodiment, and FIG. 1B is a side view thereof. It is a top view of the floating weight raising / lowering guide apparatus of the kneading machine of this embodiment, and is a figure which sees through a top beam with a top plate. It is the enlarged view which expanded and showed the vicinity of the support plate of FIG. It is an enlarged view of the connection part of the top beam and biston rod in FIG. It is a front view which shows the principal part of the conventional weight apparatus. It is an enlarged view of the connection part of the connecting beam of FIG. 5A and a piston rod.

One embodiment of a kneader equipped with a floating weight lifting guide device of the present invention will be described with reference to the accompanying drawings.
FIG. 1A is a front view of a floating weight lifting guide device of a kneader according to the present embodiment, FIG. 1B is a side view thereof, and FIG. 2 is a plan view thereof.
In FIG. 1A, the floating weight raising / lowering guide device of the kneading machine 1 has a chamber 12 provided with a kneading chamber 10 for kneading the material to be kneaded at a lower portion and a material to be kneaded of rubber material in a hopper 14 following the kneading chamber 10. A charging unit 16 for charging, a floating weight 18 for holding the kneaded material after being charged and sitting on the upper portion of the kneading chamber 10 to suppress the kneaded material being kneaded, and for discharging the kneaded material to be kneaded at the lower portion of the kneading chamber 10 And a drop door (not shown) for closing the discharge port 20.

At the introduction port for introducing the material to be kneaded introduced into the introduction unit 16 of the hopper 14, there is a front door 22 for closing the introduction port and an opening / closing drive device 24 for the front door comprising a piston / cylinder mechanism, for example. It is attached between the front door 22 and the chamber 12 as shown.
In FIG. 1B, the upper end of a piston rod 32, which is a drive unit connected to a pair of right and left hydraulic cylinders, here, a vertically moving piston of a hydraulic cylinder 30, is attached to a top beam 34. The floating weight 18 is attached to the lower end of a ram shaft 36 that is a shaft member that is attached to the center of the top beam 34 and extends in the up-and-down direction, and the top beam 34 and the ram shaft are connected by the piston rod 32 of a pair of hydraulic cylinders 30. It goes up and down via 36.

  The upper portion of the hydraulic cylinder 30 is attached to a support plate 40 provided below the top beam 34, and the lower portion thereof may be free or attached to the lower support plate. The support plate 40 is provided with a through hole 45 (FIG. 3) through which the ram shaft 36 penetrates at the center thereof, and a through hole 47 (FIG. 3) through which the ram shaft 36 similarly penetrates at the upper surface of the center plate. A lid 46 of the hopper 14 is attached.

In FIG. 1B, a guide member that extends through the through hole 35 of the top beam 34 to the left and right outer sides of the mounting position of the lid 46 of the support plate 40 and serves as a guide when the top beam 34 moves up and down. For example, a guide rod 50 is erected, and an upper end portion of the guide rod 50 is fixed to the top plate 52.
The top plate 52 is supported by a pair of support columns 54 erected on the outside of the support plate 40 in the vicinity of the erected position of the guide rod 50.

  FIG. 2 is an enlarged plan view of the floating weight raising / lowering guide device of the kneading machine 1 according to the present embodiment, in which the top beam 34 is shown in a transparent manner together with the top plate 52. A pair of support | pillar 54 is arrange | positioned in the position close | similar to the diagonal of the top plate 52 like illustration. A head portion (ram head) 38 of the ram shaft 36 is provided at the center of the top beam 34 disposed so as to intersect with a line connecting the pair of support columns 54, and a pair of guide rods 50 are provided on the left and right sides thereof. However, the piston rod 32 connected with the top beam 34 is further arranged in a straight line from the upper left to the lower right in the left and right outer sides.

FIG. 3 is an enlarged view showing the vicinity of the support plate 40 in FIG. 1 in an enlarged manner.
As shown in the figure, a through hole 45 through which the ram shaft 36 penetrates is provided at the center of the support plate 40, and a through hole through which the ram shaft 36 penetrates through the lid 46 on the upper surface of the center. 47 is provided. In addition, guide bushes 45 a and 47 a each having an inner peripheral surface serving as a guide surface of the ram shaft 36 are disposed in the respective through holes 45 and 47. The pair of guide rods 50 are inserted into mounting holes 41 provided in the support plate 40 and fixed upright by mounting brackets 43.

  A guide bush 35a is disposed in the through hole 35 of the top beam 34 as well as the above-described guide bush, and the connection between the top beam 34 and the piston rod 32 is a pin connection that can be connected and released by attaching and detaching the pin. For example, as shown in FIG. 4, it is preferable to have a structure in which a clevis 33 provided on the top beam side and a connecting piece 37 provided on the piston rod 32 side are coupled by a pin 39. By adopting such a configuration, the pins 39 can be easily connected and separated by attaching and detaching them. This structure is the same even if the piston rod 32 side is a clevis and the top beam 34 side is a connecting piece.

Next, the operation of the floating weight lifting guide device described above will be described.
Prior to kneading a material to be kneaded such as a rubber material, first, a drop door (not shown) is attached to the outlet 20 of the kneading chamber 10 in FIG. 1, and a piston (not shown) of the hydraulic cylinder 30 is provided by a hydraulic system (not shown). The pressurized oil is introduced into the lower cylinder chamber and the oil is discharged from the upper chamber of the piston, thereby raising the piston, and hence the piston rod 32 integrally connected to the piston.
When the piston rod 32 moves up, the connecting piece 37 on the piston rod 32 side, the top beam 34 connected by the clevis 33 and the pin 39 is guided by the guide rod 50 and moves up smoothly.

  When the top beam 34 is raised, the ram shaft 36 integrally connected thereto is lifted upward through the support plate 40 and the through hole 47 of the lid body 46 and is attached to the lower end of the ram shaft 36. 18 is lifted up to a predetermined standby position and stopped at that position.

  In this state, when the material to be kneaded is charged into the hopper 14 from the charging unit 16, the material to be kneaded is dropped into the kneading chamber 10, and then the reverse process is performed to obtain the floating weight 18. Then, it is seated on the upper part of the kneading chamber 10 as a presser for the kneaded material. Thereafter, kneading of the rubber material as the material to be kneaded is performed by a pair of rotors (not shown) in the kneading chamber 10 that are reversely rotated, and when the kneading is completed, the drop door (not shown) is removed and the kneaded material is dropped from the discharge port 20. And take it out.

  It is ideal that the pair of cylinder / piston mechanisms are operated in synchronism in raising and lowering the floating weight 18, but in actuality, there are cases in which they are slightly out of synchronism. In this case, if the guide rod 50 is not provided, the top beam 34 is slightly inclined, and the inclination causes the ram shaft 36 penetrating the support plate 40 and the lid body 46 to be relatively largely inclined. Occasionally, the guide bushes 45a and 47a may be broken and may be broken in extreme cases.

In contrast, in the present embodiment, the pair of guide rods 50 are provided, and the guide rods 50 guide the elevation of the top beam 34, so that the operations of the pair of cylinder / piston mechanisms are not synchronized and the piston rods 32 are not synchronized. When the top beam 34 is tilted slightly, the guide rod 50 slides against the guide bush 35a in the through hole 35 of the top beam 34, so that the guide rod 50 absorbs bending stress, and However, the cylinder also swings from side to side, but the top beam 34, and thus the ram shaft 36, does not tilt significantly.
In addition, since the guide rod 50 supports the top beam 34, the weight of the top beam 34 does not act only on the ram shaft 36.
Therefore, the ram shaft 36 does not hit the guide bushes 45a and 47a of the support plate 40 and the through holes 45 and 47 of the lid body 46 during the raising and lowering, and the bending stress does not act.

  In the present embodiment, the joint between the top beam 34 and the piston rod 32 is joined by a clevis and a pin. Therefore, when disassembling for maintenance or repair, the pin may be simply pulled out. In the weight device described in Patent Document 3, it can be disassembled much more easily than when the first and second connecting means that form a cylindrical shape engaged with each other at the stepped portions are removed. is there.

In the present embodiment, as shown in FIG. 3, the head portion (ram head) of the ram shaft 36, the pair of guide rods 50, and the piston rod 32 connected to the top beam 34 are arranged in a straight line. It is easy to manufacture and the positional accuracy of each other is improved.
In the above embodiment, the cylinder is fixed and the piston rod is used as the drive unit. However, it is also possible to fix the piston rod and raise and lower the cylinder to use the drive unit.

  DESCRIPTION OF SYMBOLS 10 ... Kneading chamber, 12 ... Chamber, 14 ... Hopper, 16 ... Input part, 18 ... Floating weight, 20 ... Discharge port, 22 ... Front door, 24 ... Open / close drive device for front door, 30 ... hydraulic cylinder, 32 ... piston rod, 33 ... clevis, 34 ... top beam, 35 ... through hole, 36 ... ram shaft, 37 ... connecting piece, 39 ... pin, 40 ... support plate, 41 ... mounting hole, 43 ... mounting bracket, 45 ... through hole, 46 ... lid, 47 ..Through hole, 50 ... guide rod, 52 ... top plate, 54 ... post.

Claims (4)

A floating weight that serves as a pressing member for a kneading chamber that is raised and lowered in the kneader, a shaft member that is connected to the floating weight and extends in the raising and lowering direction, and a top beam that is orthogonally connected to the upper end of the shaft member at the center. And a pair of hydraulic cylinder driving parts respectively connected to both ends of the top beam, and a pair of guide members for guiding the top beam erecting up and down on the body of the kneader,
A kneading machine provided with a floating weight lifting guide device, wherein the drive part of the hydraulic cylinder and the top beam are connected by a pin. In a kneader provided with the floating weight lifting guide device according to claim 1,
A kneading machine equipped with a floating weight lifting guide device characterized in that a connection between the driving part of the hydraulic cylinder and the top beam is a clevis structure composed of a clevis and a pin. In a kneader equipped with the floating weight lifting guide device according to claim 1 or 2,
The hydraulic cylinder is attached to a support plate attached to the body of the kneading machine, the guide member is erected inside the hydraulic cylinder attachment portion of the support plate, and A kneading machine provided with a floating weight lifting guide device, wherein a through-hole through which a shaft member passes is provided. In the kneader provided with the floating weight lifting guide device according to any one of claims 1 to 3,
A kneading machine provided with a floating weight lifting guide device, wherein the upper end portion of the guide member is fixed to a top plate supported by a column fixed to the machine body.

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