JP5139879B2 - Dehydrator - Google Patents

Description

  The present invention is a laundry in which laundry containing moisture such as clothes and linen after washing is put into a basket, and the laundry is compressed from above and dehydrated by a pressure body attached to the tip of a piston rod of a hydraulic cylinder. The present invention relates to a squeeze type dehydrator.

As for the technology applied to the conventional squeezing dehydrator, as disclosed in Patent Document 1, it has a hydraulic or hydraulic cylinder as the squeezing means, and the end of the piston rod of the hydraulic cylinder is on the periphery. A circular press plate fitted with a guide ring is fixed, and a pressure body such as a membrane or an elastic body filled with liquid is attached to the press plate, and the upper and lower surfaces are surrounded by a mesh belt for conveyance below. Lattice deck with a large number of drainage holes, suspended concentrically with the press plate so that it can be raised and lowered, and placed at the lower end position on the transfer mesh belt to store the laundry, and the upper end In the position, a configuration is known in which a bottomless basket is provided that allows dehydrated laundry (cake) to be moved to a downstream process.
Further, Patent Document 1 proposes that a plurality of guide rings are fitted in the groove on the side surface of the press plate to increase the effect of preventing the contact surface from being scratched, peeled off, and fused due to contact between the press plate outer surface and the basket inner surface. Has been made.

Patent Document 2 is different in detail structure from Patent Document 1, but when the diaphragm (pressurizing body) is attached to the piston body (press plate), the fixing ridge part integrated with the diaphragm is tightened with a tightening ring. As a structure, the outer diameter of the tightening ring is smaller than the inner dimension of the filling frame (basket) by (x) (the symbol in the drawing of Patent Document 2 is displayed in parentheses. The same applies hereinafter). It is effective to increase the size (u) of the collar portion of the diaphragm in a free state with respect to the filling frame. Further, when water is pumped into the intermediate chamber between the piston body and the diaphragm during pressing (pressurization), the diaphragm causes the annular gap between the piston body and the filling frame to be in a sealed state upward. ing.
Japanese Utility Model Publication No. 62-189087 (FIG. 5) JP 61-247500 A (FIGS. 11-13)

  According to Patent Document 1, since the attachment portion of the guide ring to the press plate is separated upward from the boundary of the attachment portion of the pressurizing body, the shoulder portion of the pressurizing body that is an elastic body is pressed at the time of pressurization by high pressure. It cannot be prevented that it bites into the annular gap between the plate and the basket. Due to the deformation due to the bite, there is a possibility that the life of the pressure body is short, and there is a problem of extending the life of the pressure body.

  Even in Patent Document 2, it is impossible to prevent the root of the ridge for fixing the diaphragm from biting into the annular gap between the tightening ring and the filling frame at the time of pressing, and there is a possibility that the life of the diaphragm is short due to deformation due to this biting. There was a problem of prolonging the lifespan.

The present invention solves the above problems by the following means.
(1) The dehydrator of the first means removes moisture by squeezing laundry such as washed clothes put into the basket by a pressurizing body attached to a press plate that moves up and down and enclosed with liquid. In the dehydrator for dewatering, on the outer peripheral side of the ring for fixing the pressurizing body fitted on the outer peripheral side of the press plate between the press plate and the outer peripheral portion of the press plate or the outer peripheral portion of the ring To prevent damage to the contact surface due to contact with the inner peripheral portion of the basket, the guide ring is fitted in the outer peripheral groove of the ring or the press plate, and is close to the boundary with the pressurizing body. A backup ring is fitted into the outer peripheral groove of the ring, and the shoulder of the boundary between the pressure body and the ring is prevented from biting into the annular gap between the ring and the basket when the pressure body is pressurized. The features.
(2) In the dehydrator of the second means, in the dehydrator of the first means, the guide ring is not provided on the ring or the press plate, and the backup ring is provided to the place where the guide ring is provided. A wide backup ring that extends upward and also functions as the guide ring is used.

The invention according to claim 1 is the outer peripheral side of the ring for fixing the pressurizing body fitted on the outer peripheral side of the press plate between the press plate and the outer peripheral portion of the press plate or the outer periphery of the ring. In order to prevent damage to the contact surface due to contact between the portion and the inner peripheral portion of the basket, it approached the boundary portion with the pressurizing body below the guide ring fitted in the outer peripheral groove of the ring or press plate. Since the backup ring is provided in the outer circumferential groove of the ring configured at the position, the shoulder of the boundary between the pressure body and the ring bites into the annular gap between the ring and the basket when the pressure body pressurizes. The effect is suppressed, and the higher the pressure applied by the pressure body, the greater the effect.
In addition to the above-described effect, the invention according to claim 2 does not provide the guide ring on the ring or the press plate, and extends the backup ring upward to a position where the guide ring is provided. Since it is a wide backup ring that also functions as a guide ring, in addition to the function of preventing biting into the annular gap of the shoulder portion of the pressure member, the wide width has the effect of significantly increasing the life as a guide ring function.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In addition, constituent elements in the following embodiments include those that can be easily assumed by a party or those that are substantially the same.

(First embodiment)
A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a side sectional view showing a state before pressing of a dehydrator to which the present invention is applied. FIG. 2 is an enlarged cross-sectional view of a part A in FIG. 1 and shows a structure of the backup ring of the dehydrator according to the first embodiment of the present invention.

  In FIG. 1, reference numeral 35 denotes a lower frame, which is installed on the floor surface. Reference numeral 36 denotes an upper frame, which is fixed to the lower frame 35 with a plurality of pillars 37 disposed thereon. 38 is a deck as a lattice member fixed to the lower frame 35, 39 is a deck plate which is a porous plate fixed to the deck 38, 40 is a porous mesh or mesh-like wide mesh belt for transporting water. Reference numeral 41 denotes a roll for driving the mesh belt 40.

  Reference numeral 42 denotes a basket whose lower half is a perforated plate formed in a cylindrical shape and has a drainage property, and is raised and lowered by a lifting device (not shown), and 43 is an opening for laundry that is an opening formed in the upper part of the basket 42 , 44 is a guide fixed to the basket 42 and engages with the pillar 37, 47 is a hydraulic cylinder fixed to the upper frame 36, 48 is a hydraulic device including an oil tank and a hydraulic circuit for the hydraulic cylinder 47, and 49 is a hydraulic device. A hydraulic pump for 48, 50 a drive motor for the pump 49, and 51 a piston rod for the hydraulic cylinder 47 are shown.

Reference numeral 52 denotes a press plate, which is fixed to the piston rod 51. 53 is a pressurizing body that is an elastic film that closes the opening with the press plate 52 and encloses water, 54 is a water supply port mounted on the press plate 52, 55 is an air vent mounted on the press plate 52, 56 Is a liquid such as water sealed between the press plate 52 and the pressure member 53.
Further, 58 is a continuous water washing machine arranged before the dehydration process, 59 is a discharge conveyor arranged after the dehydration process and connected to the dryer in the direction of arrow B, 60 is clothes to be dehydrated or a set of them It is the laundry that is the body.

In FIG. 2, 65 is a metal ring that attaches the pressure body 53 to the press plate 52, and has a structure in which the convex portion 53B of the upper end portion of the pressure body 53 is hooked by the concave portion 65A as shown in FIG. The pressure body 53 is fixed to the press plate 52 with bolts 69. The mounting surface between the press plate 52 and the ring 65 is liquid-tightly sealed with an O-ring (not shown). 57 is a guide ring made of hard polyurethane rubber or the like for preventing the outer peripheral surface of the press plate 52 or the ring 65 from coming into contact with the inner peripheral surface of the basket 42 and scratching, peeling, or fusing. The ring 65 is fitted into the upper annular groove 65B at the upper outer periphery side.
66 is a backup ring made of ultra-high molecular weight polyethylene or the like for preventing the shoulder 53A of the pressurizing body 53 from biting into the annular gap between the outer peripheral surface of the ring 65 and the inner peripheral surface of the basket 42 during pressurization. As shown in the drawing, the ring 65 is fitted into the lower annular groove 65C at the lower outer peripheral side.
The outer diameter of the backup ring 66 is substantially the same as the outer diameter of the guide ring 57, and the annular gap with the inner diameter of the basket 42 is 1 mm or less.
In the present embodiment, the guide ring 57 is provided in the outer circumferential groove of the ring 65, but may be provided in the outer circumferential groove of the press plate 52.

Next, the operation of the dehydrator according to this embodiment will be described.
First, when the dehydrator is in the state shown in FIG. 1, that is, in a state where the mesh belt 40 is stopped, the basket 42 is in the lowered position, and the piston rod 51 is in the raised position, It is thrown into. At this time, excess rinsing water contained in the laundry 60 is squeezed out by gravity and flows out as drained water through the mesh belt 40, the deck plate 39, and the deck 38.
Next, when the hydraulic device 48 is activated in response to the closing completion signal from the continuous water washer 58, the piston rod 51 is lowered by the hydraulic cylinder 47 and attached to the press plate 52 fixed to the tip of the piston rod 51. The pressed body 53 pressurizes the laundry 60.

  At this time, since the sealed liquid 56 is contained in the pressurizing body 53, the laundry 60 receives a uniform pressure from the pressurizing body 53 and is uniform if the laundry 60 is uniformly placed in the basket 42. Dehydration is performed. Usually, the laundry 60 is not always put uniformly in the basket 42, and in this case, the press plate 52 receives a horizontal component force in addition to a vertical force for pressurization. Therefore, a part of the outer peripheral surface of the metallic press plate 52 may come into contact with a part of the inner peripheral surface of the metal basket 42, but the press plate 52 and the basket 42 are guided by a guide ring 57 made of polyurethane rubber or the like. Avoid metal contact.

Since the pressurizing body 53 is an elastic body, it tends to escape to a location where the pressure is weak when pressurizing with a high pressure. In particular, the shoulder 53A of the pressurizing body 53 tries to bite into the annular gap between the lower part of the outer peripheral surface of the ring 65 and the inner peripheral surface of the basket 42, and the shoulder is formed by the backup ring 66 provided at the lower part of the outer peripheral part of the ring 65. Biting of the portion 53A into the annular gap can be greatly suppressed.
The annular gap between the outer peripheral surface of the backup ring 66 and the inner peripheral surface of the basket 42 is set to 1 mm or less in consideration of manufacturing errors.

(Second Embodiment)
A second embodiment of the present invention will be described with reference to FIG. FIG. 3 is an enlarged cross-sectional view showing a backup ring structure of a dehydrator according to the second embodiment of the present invention, and corresponds to FIG.

In FIG. 3, 67 is a metal ring for attaching the pressurizing body 53 to the press plate 52, and has a structure in which a convex portion 53B at the upper end of the pressurizing body 53 is hooked by a concave portion 67A as shown in FIG. The pressure body 53 is fixed to the press plate 52 with bolts 69. The mounting surface of the press plate 52 and the ring 67 is liquid-tightly sealed with an O-ring (not shown).
68, so that the shoulder 53A of the pressing body 53 does not bite into the annular gap between the outer peripheral surface of the ring 67 and the inner peripheral surface of the basket 42 during pressurization, and the outer peripheral surface of the press plate 52 or the ring 67. Is a backup ring made of ultra-high molecular weight polyethylene or the like to prevent the contact surface from being scratched, peeled off, or fused by contacting the inner peripheral surface of the basket 42, as shown in FIG. It is fitted in an annular groove 67B extending from the upper part to the lower part.
The annular gap between the outer diameter of the backup ring 68 and the inner diameter of the basket 42 is configured to be 1 mm or less.

Next, the operation of the dehydrator according to the second embodiment will be described, but the description overlapping with the description of the first embodiment will be omitted.
When the press plate 52 is subjected to a horizontal component force during pressurization, metal contact between the press plate 52 and the basket 42 can be avoided by the backup ring 68 made of ultrahigh molecular weight polyethylene or the like.
Further, the shoulder 53A of the pressurizing body 53 tries to bite into the annular gap between the lower portion of the outer peripheral surface of the ring 67 and the inner peripheral surface of the basket 42 when being pressurized by high pressure, but is fitted into the outer peripheral portion of the ring 67. The backup ring 68 can significantly suppress the biting of the shoulder 53A into the annular gap.
That is, the backup ring 68 can perform both a conventional guide ring function and a function of suppressing the shoulder portion 53A of the pressurizing body 53 from biting into the annular gap between the ring 67 and the basket 42 during pressurization. The life of the guide ring can be extended due to its wide width.
The annular gap between the outer diameter of the backup ring 68 and the inner diameter of the basket 42 is set to 1 mm or less in consideration of manufacturing errors.

It is side surface sectional drawing which shows the state before pressing of the dehydrator concerning the 1st Embodiment of this invention. It is the A section expanded sectional view of Drawing 1, and is a figure showing the backup ring structure of the dehydrator concerning the 1st embodiment of the present invention. It is an expanded sectional view which shows the backup ring structure of the dehydrator concerning the 2nd Embodiment of this invention, and is equivalent to FIG.

Explanation of symbols

42 ... Basket,
51 ... Piston rod,
52 ... press plate,
53 ... Pressurized body,
56 ... (enclosed) liquid,
57 ... Guide ring,
60 ... Laundry,
65, 67 ... ring,
65B ... upper annular groove,
65C ... Lower annular groove,
66, 68 ... backup ring,
67B ... Annular groove

Claims (2)

  In a dehydrator that dehydrates laundry such as washed clothes put into a basket by pressing with a pressurizing body that is attached to a press plate that moves up and down and encloses liquid, the outer peripheral side of the press plate A contact surface on the outer peripheral side of the ring that fixes the pressurizing body fitted between the press plate and the outer peripheral portion of the press plate or the outer peripheral portion of the ring and the inner peripheral portion of the basket. In order to prevent damage to the ring, the pressure is applied to the outer circumferential groove of the ring, which is configured below the guide ring fitted in the outer circumferential groove of the ring or the press plate and close to the boundary with the pressure member. A dehydrator comprising a back-up ring that suppresses a shoulder at a boundary portion of the body with the ring from biting into an annular gap between the ring and the basket when pressed by the pressurizing body.   2. The dehydrator according to claim 1, wherein the guide ring is not provided on the ring or the press plate, and the backup ring is extended upward to a position where the guide ring is provided, and also functions as the guide ring. A dehydrator characterized by a wide backup ring.

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