JPH047396Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Purpose of the invention] (Field of industrial application) The present invention is mainly applied to the front opening of a large rectangular pressure vessel such as a high-pressure steam sterilizer used in hospitals. The present invention relates to a square door tightening device for a pressure vessel for tightening a square door that can be opened and closed in a sealed state.

(Prior Art) Conventionally, although not shown, a radiation bar type, an eye bolt type, a clutch lever type, etc. have been adopted as door tightening devices for this type of pressure vessel, but each of these methods has its advantages and disadvantages. It was hot. In other words, the radiation rod type and eyebolt type are mechanically the most reliable methods, but they require a large number of radiation rods, eyebolts, and their tightening handles, and are extremely complex in structure. It is difficult to automate and the tightening operation must be done manually, and there is no problem if the container is relatively small, but if the square door becomes large (for large pressure vessels), the radiation rod will become longer and the strength will increase. There were some flaws that I couldn't stand. Further, in the case of the clutch type, although the pressure vessel has a circular cross section, that is, it can be applied to a round door, it is not suitable for tightening the square door of a rectangular cross-section container, which is the object of the present invention.

Therefore, a lever type has recently been proposed to improve the problems of the above-mentioned conventional methods. As shown in Japanese Unexamined Patent Publication No. 60-222666, a plurality of rotary levers are disposed at intervals on the outer periphery of the front opening of the pressure vessel on all four sides via flanges. Further, screws for individually driving each of these rotary levers via rods are attached to the back side of the flange, and a transmission mechanism for operating these screws in synchronization and a motor with a speed reducer as its driving source are provided. The configuration is as follows.

When the square door is closed, the motor rotates, and the rotational force is transmitted to multiple screws on each of the four sides, top, bottom, left, and right, through the transmission mechanism, and each screw operates, individually passing through the rod each time. Rotate the moving lever 90 degrees while pulling it backwards.
The pivot levers then engage the front surfaces of the upper, lower, left, and right edges of the corner door to press the corner door against the opening of the container and tighten it to maintain a sealed state. Note that, due to the reverse rotation of the motor, each rotating lever rotates in the opposite direction to the above and separates from the corner door, thereby allowing the corner door to be opened and closed.

(Problems to be solved by the invention) By the way, with the lever type described above, the corner door can be automatically tightened by motor drive, and the drawbacks of the conventional method can be overcome.However, as mentioned above, the opening A plurality of rotating levers and their drive screws are installed on the outside of the four sides of the top, bottom, right, left, and right sides, and a transmission mechanism (countershaft, coupling, bevel gear, spur gear, etc. linked to the motor) is installed to operate each screw around the lever. Furthermore, it is necessary to provide support brackets and adjustment screws to assist the movement of each rotating lever. Therefore, the number of parts is very large and the configuration is complex, and the installation of each component and mutual assembly and adjustment are troublesome, and maintenance is difficult.
There was a problem with the lack of practicality.

This invention was developed in view of the above circumstances, and has a large number of parts and is very easy to assemble and maintain, while also being highly practical in that it can automatically and easily tighten large square doors. The purpose of the present invention is to provide a square door tightening device for a pressure vessel.

[Structure of the idea]

(Means for solving the problem) In order to achieve the above-mentioned purpose, each lid tightening device for a pressure vessel of the present invention has flanges protruding from the outer periphery of the top, bottom, left and right sides of the front opening of the pressure vessel. A long clutch bar is disposed to be slidably engaged with the left and right flanges along the longitudinal direction thereof, and each clutch bar has a plurality of presser claws arranged at equal intervals on the inner periphery side. Hydraulic cylinders are provided on the upper, lower, left and right outer peripheries of the container, respectively, and are connected to the upper, lower, left and right outer peripheries of the container, respectively, for reciprocating the upper, lower, left and right clutch bars by a predetermined stroke by extending and contracting them individually using hydraulic pressure. A common hydraulic power unit for synchronously extending and retracting each hydraulic cylinder is disposed outside the container, and on each side of the corner door there are hydraulic cylinders that drive the upper, lower, left and right clutch bars when the corner door is closed. A plurality of engaging claws are provided protruding from the outer circumferential side at equal intervals, and the engaging claws engage with the back side of each of the holding claws when moved to one side by The structure is characterized in that at least one of the square doors is formed as an inclined surface, and when they engage with each other, a pressing force for pressing the square door against the opening of the pressure vessel is obtained.

(Function) With the above configuration, when the square door is in the closed state, the upper, lower, left, and right hydraulic cylinders are supplied with oil from the hydraulic power unit via the hydraulic pipe and operate synchronously, and the four upper, lower, left, and right hydraulic cylinders are connected to each other. Slide the clutch bar in one direction along the flange. As a result, the plurality of presser claws of each of the clutch bars engage with the front side of the plurality of engagement claws on the four sides of the top, bottom, left and right sides of the corner door in the closed state, so that the two claws overlap each other. Since at least one of the engaging surfaces of is an inclined surface,
As the engagement depth of both claws increases, the presser claw generates a force that presses the engagement claw backward, and the square door is tightly held in the opening of the pressure vessel in a sealed state via the gasket. become. In addition, when the corner door is tightened, the upper, lower, left, and right hydraulic cylinders are switched and refueled from the hydraulic power unit and operate in the opposite direction to slide the four clutch bars (up, down, left, and right) in the other direction. The individual presser claws disengage from the front surface of the engaging claws on the four sides of the top, bottom, right, left, and right of the corner door and retreat, and the force pressing the corner door against the opening of the pressure vessel is released. Doors can be opened and closed again.

(Example) An example of the present invention will be described below with reference to the drawings.
First, Fig. 1 shows a front view, and Fig. 2 shows a side view with a part cut away. It is a single-opening square door that closes.

The pressure vessel 1 includes a square box-shaped container body 3 with an open front surface to form the opening 1a;
It is composed of a plurality of reinforcing ribs 4 fixedly attached to the outer periphery (top, bottom, left and right) and the back surface, and is composed of the floor surface A inside the building (see Figure 2) and the inner bottom surface 3a of the container body 3.
The base 5 is buried under the floor so that the height is approximately the same.
It is placed on top and fixed.

Here, a thick-walled flange 6 is fixed and protruded in the shape of a rectangular frame that surrounds the entire circumference on the outer periphery of the front opening 1a of the pressure vessel 1 on all four sides. Engagement guide grooves 6a are formed along the longitudinal direction on the front and rear surfaces, respectively. A long clutch bar 7 is disposed on each of the upper, lower, left, and right sides of the flange 6 so as to be fitted thereinto. Each of these four clutch bars 7 has a substantially U-shaped cross section as shown in FIG. The left and right pieces are slidably guided and engaged in the longitudinal direction. Further, each of the clutch bars 7 is provided with a plurality of presser pawls 8 which protrude inwardly from the front side edge in a tooth shape and are arranged in rows at equal intervals.

Furthermore, one hydraulic cylinder 9 is disposed on the upper, lower, left, and right outer peripheries of the container body 3 of the pressure vessel 1 along the vicinity of the back surface of each of the upper, lower, left, and right pieces of the flange 6. Each of these hydraulic cylinders 9 is of a double-acting type in which each of the upper, lower, left, and right clutch bars 7 is individually reciprocated by a predetermined stroke by the expansion and contraction movement of a piston rod by hydraulic pressure, and as shown in FIGS. 3 and 5, the base end of each cylinder is 9a is the container main body 3
is connected to the outer peripheral surface of the bracket 10 via a bracket 10,
A piston rod tip end 9b that moves telescopically is connected to the back surface of the clutch bar 7 at the relevant position via a bracket 11.

These four hydraulic cylinders 9 (top, bottom, left and right) are connected to a hydraulic power unit, which is a common drive source, installed at a suitable location outside the pressure vessel 1 via hydraulic pipes (not shown), although chambers at both ends of the cylinders are not shown in the figure. . This hydraulic power unit is an oil tank/hydraulic pump. It is equipped with an electromagnetic valve, a control valve for adjusting the flow rate for speed control, etc., and is equipped with door closing detectors (not shown) (disposed at the four corners around the front opening 1a of the pressure vessel 1 to detect the closed state of the corner door 2). A signal from a limit switch, etc.) causes all of the hydraulic cylinders 9 to extend and contract in the same direction in synchronization.

On the other hand, the corner door 2 has grooves 2a on the top, bottom, left and right sides of the back surface, into which a gasket 12 is fitted over the entire circumference, and when the square door 2 is closed, the gasket 12 It is adapted to come into contact with the front surface around the opening 1a of No. 1. Further, on each of the top, bottom, left and right sides of this corner door 2, a plurality of engagement claws 13 protruding outward in the shape of teeth like the presser claws 8 are arranged in rows at equal intervals. Matching claw 13
When the square door 2 is in the closed state, the upper, lower, left and right clutch bars 7 are moved in one direction by hydraulic cylinder drive, so that they engage with the back side of each of the presser claws 8 and are pressed down. As shown in FIG. 6, these engaging claws 13 and presser claws 8 are wedge-shaped and face each other, and their mutual engaging surfaces 13a and 8a are both sloped surfaces, and when they engage with each other, the corner door 2 to the opening 1a of the pressure vessel 1.

As shown in FIGS. 1 and 2, the square door 2 is supported by an opening/closing support mechanism 14 so that it can be opened and closed in a single-opening manner. That is, the opening/closing support mechanism 14 includes a pair of upper and lower brackets 15 protruding forward from one side outer surface of the container body 3 of the pressure vessel 1, and a bearing 1 at each front end of the upper and lower brackets 15.
6, and one support shaft 17 is attached to this upper and lower bearing 16.
are fitted rotatably, and this vertical support shaft 1
7 and a pair of upper and lower hinge arms 18.
are provided protrudingly, and the square door 2 is attached and supported at the tips of these upper and lower hinge arms 18. Further, this opening/closing support mechanism 14 has a function of supporting the opening/closing rotation of the square door 2 and also has a lifting function by itself. That is, when the corner door 2 is closed to the front opening 1a of the pressure vessel 1, the lower end of the corner door 2 (the engaging claw 13 on the lower end side
) must be located at a lower position than the floor A mentioned above. In other words, even if the corner door 2 is rotated horizontally from the closed state at the same height, the floor surface A is in the way and cannot be opened. For this purpose, the lifting hydraulic cylinder 20 is connected directly below the vertical support shaft 17 of the opening/closing support mechanism 14 via the push-up rod 19, and a half-open detector (not shown) is connected to the vertical support shaft 17 of the opening/closing support mechanism 14. The square door 2 is expanded and contracted in response to a signal from a limit switch (such as a limit switch that detects the arrival of the door), and the support shaft 17 and the hinge arm 18 are moved up and down within a predetermined range via a push-up rod 19.

The operation of the above configuration will now be explained. First, when the square door 2 is manually rotated via the opening/closing support mechanism 14 and closed at the front opening 1a of the pressure vessel 1 as shown in FIGS. 1 and 2, the door closing detector detects this. , This signal causes the hydraulic power unit to operate and supply oil to the upper, lower, left, and right hydraulic cylinders 9 via the hydraulic pipe, and this causes each of the hydraulic cylinders 9 to
are expanded synchronously. Each hydraulic cylinder 9
Due to the extension movement of the piston rod, the four clutch bars 7 connected to the piston rod are connected to the flange 6.
is made to slide in one direction along. As a result, the plurality of presser claws 8 of each of the clutch bars 7 engage with the front side of the plurality of engagement claws 13 on the four sides of the top, bottom, left and right sides of the corner door 2 in the closed state so as to overlap with each other. In this case, since the mutually engaging surfaces 8a and 13a of both claws 8 and 13 are sloped surfaces, as the engagement depth of both claws becomes deeper, the presser claw 8 pushes the engaging claw 13 backward. Generates a pressing force,
The square door 2 is now tightly and tightly held at the opening 1a of the pressure vessel 1 via the gasket 12.

In this state, an automatic control device such as a limit switch (not shown) is activated and sterilization of the contents in the pressure vessel 1 is automatically started. When the sterilization work is completed, the upper, lower, left, and right hydraulic cylinders 9 are switched in the opposite direction from the hydraulic power unit and retracted in the opposite direction by an automatic or manual command, and the four upper, lower, left, and right clutch bars 7 are all synchronized. By sliding in the other direction, the plurality of presser claws 8 are separated from the front surfaces of the plurality of engagement claws 13 on the upper, lower, left, and right sides of the corner door 2 and retreated. This releases the force pressing the square door 2 against the opening 1a of the pressure vessel 1, allowing it to open and close.

In addition, in order to easily take out the sterilized contents, the sterilized items are loaded onto a trolley, and the gap between the end of the floor surface A and the opening side end of the pressure vessel 1 is kept as small as possible so that the sterilized contents can be loaded onto a trolley and carried in and out together with the trolley. are doing. Then, raise the corner door 2 above the floor A and open it wide. The way to release it is to open the corner door 2 a little, then the half-open detector is activated, and in response to this signal, the lifting hydraulic cylinder 20 is pushed up, so that the lower end of the corner door 2 is slightly lower than the floor A. The entire corner door 2 is raised until it becomes high, and in this state, if the corner door 2 is pulled and rotated, it can be fully opened and the contents can be taken out. In addition, when the corner door 2 is rotated to close after carrying in the next sterilized item, the half-open detector is activated just before the corner door 2 closes to the opening 1a, and upon receiving this signal, the The hydraulic cylinder 20 releases the push-up force, and the square door 2 descends to a height that is just right for the opening 1a. If the square door 2 is pushed in this state, it will be in the closed state where it joins to the opening 1a. The upper, lower, left, and right hydraulic cylinders 9 are activated to perform a tightening operation in the same manner as described above.

It should be noted that the present invention is not limited to the above-mentioned embodiments; for example, although the corner door 2 is partially opened and closed manually, full automation is also possible using various limit switches and controllers. Further, although the engaging surfaces 8a and 13a of both the presser pawl 8 of the clutch bar 7 and the engaging pawl 13 of the square door 2 are both sloped surfaces, it is also possible to make only one of them sloped. Various other changes may be made without departing from the gist of the present invention.

[Effect of idea]

Since the present invention has been developed as described above, the number of parts is significantly reduced, the assembly configuration and maintenance are very simple, and the pressure vessel has great practicality because it can automatically tighten a large square door easily and reliably. This is a corner door tightening device.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a front view, Fig. 2 is a partially cutaway side view, Fig. 3 is an enlarged plan view of the main part, and Fig. 4 is a front view of the main part. Figure 5 is a sectional view of the same essential parts, and Figure 6 is a - of Figure 4.
It is a sectional view along a line. DESCRIPTION OF SYMBOLS 1... Pressure vessel, 1a... Opening, 2... Square door, 3... Container body, 6... Flange, 7... Clutch bar, 8... Presser claw, 8a... Engaging surface, 9
... Hydraulic cylinder, 12 ... Packing, 13 ...
Engaging claw, 13a... engaging surface, 14... opening/closing support mechanism.

Claims (1)

[Scope of utility model registration request] In a square door tightening device for a pressure vessel that seals a square door that can be opened and closed on the front opening of a pressure vessel used for sterilization etc. using a gasket, the four sides of the top, bottom, right and left of the front opening of the pressure vessel are used. A flange is provided protruding from the outer periphery, and elongated clutch bars are arranged to be slidably engaged with the upper, lower, left, and right flanges along the longitudinal direction thereof, and each of the clutch bars is provided with a plurality of presser claws. Hydraulic cylinders are provided on the upper, lower, left, right, and outer peripheries of the container, respectively, and are arranged at equal intervals so as to protrude toward the inner periphery, and each of which causes the upper, lower, left, and right clutch bars to reciprocate by a predetermined stroke by an expansion and contraction action using hydraulic pressure. A common hydraulic power unit is installed outside the container, which is connected to each of these hydraulic cylinders by a hydraulic pipe and causes the hydraulic cylinders to extend and contract in synchronization.On the other hand, on each of the top, bottom, right, left, and right sides of the corner door, there are installed a common hydraulic power unit that is connected to each of the hydraulic cylinders by a hydraulic pipe and allows the cylinders to expand and contract in synchronization. When the upper, lower, left, and right clutch bars are moved in one direction by hydraulic cylinder drive, a plurality of engaging claws are provided protruding from the outer circumferential side at equal intervals to engage with the back side of each of the presser claws, and A corner of a pressure vessel characterized in that at least one of the engaging surfaces of the mating claw and the presser claw is an inclined surface, and the mutual engagement provides a pressing force to press the corner door against the opening of the pressure vessel. Door tightening device.