Sealed handle device

Abstract

To surely seal a casing with a door by surely holding at least a lock position of a handle lever and surely engaging a hook and a hook receiving portion.SOLUTION: A device H includes a leaf spring 7 around the rotation of a pedestal-side rotation shaft portion 11 within a handle pedestal 1 so as to be able to press against a circumferential surface of the pedestal-side rotation shaft 11, at least in an engaged state of a hook 2 of a sealing handle h1 and a hook receiving portion 6 of a handle receiver h2, The leaf spring 7 maintains the engaged state between the hook 2 and the hook receiving portion 6.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a sealing handle device that seals a housing by bringing a door into close contact with a frame around an opening of the housing.

Background Art

[0002] Conventionally, there are refrigerators, kitchen equipment, medical equipment, etc. that require airtightness of the door. In such equipment, a sealing handle device that seals the housing by bringing the door into close contact with a frame around the opening of the housing is used.

[0003] This type of sealing handle device is disclosed in, for example, Patent Document 1, and generally, as shown in FIGS. 11 and 12, it includes a sealing handle h81 and a handle receiver h82. As shown in FIG. 11, the sealing handle h81 has a handle pedestal 811, a hook 812 rotatably connected to the handle pedestal 811 via a rotating shaft 810, and a handle lever 813 for rotating the hook 812. In this sealing handle h81, the rotating shaft 810 is rotatably disposed within the handle pedestal 811, and its tip is a pedestal-side rotating shaft portion a protruding from the front surface of the handle pedestal 811, a handle lever-side rotating shaft portion b protruding coaxially with the pedestal-side rotating shaft portion a on the handle lever 813, and a hook-side rotating shaft portion c provided on the hook 812 and operatively connected between the pedestal-side rotating shaft portion a and the handle lever-side rotating shaft portion b. As shown in FIG. 12, the handle receiver h82 has a mounting base 821 and a hook receiver portion 822 protruding substantially L-shaped from the mounting base 821 and receiving the hook 812 of the sealing handle h81. In this way, one of the sealing handle h81 or the handle receiver h82 is attached to the frame side around the opening of the housing by a mounting screw, and the other is attached to the door side by a mounting screw. By engaging the hook 812 of the sealing handle h81 with the hook receiver portion 822 of the handle receiver h82, the door is brought into close contact with the frame around the opening of the housing to seal the opening of the housing.

[0004] Figure 13 shows an example of the use of this sealing handle device in equipment where a tight seal is required for the door. In this example, the housing 9A is box-shaped, with a rectangular recess 91 formed on its front, and a rectangular opening 90 formed on the back surface of this recess 91. A packing 92 is provided along the entire periphery of the opening 90 within the front recess 91. In this case, the area outside the recess 91 on the front of the housing 9A forms the frame of the housing 9A to which either a sealing handle h81 or a handle receiver h82 is attached. The door 9B is rectangular in shape and formed to a thickness corresponding to the depth of the recess 91 so as to be fittable into the recess 91 on the front of the housing 9A. The door 9B is mounted so as to be rotatable vertically toward the front of the housing 9A via a pair of hinges 93 between the lower front of the door 9B and the lower front frame of the housing 9A.

[0005] In this setup, a sealing handle h81 is mounted on the upper center of the front of door 9B, and a handle receiver h82 is mounted on the upper center of the front frame of housing 9A. In this case, the sealing handle h81 is positioned horizontally, with a handle base 811 mounted to the upper center of the front of door 9B by mounting screws, and the handle lever 813 is positioned on the upper center of the front of door 9B, with the length of the handle lever 813 oriented parallel to the upper edge of door 9B, and the hook 812 protruding above the upper edge of door 9B approximately perpendicular to the upper edge of door 9B in a locked position, and the length of the handle lever 813 oriented perpendicular to the upper edge of door 9B, and the hook 812 retracting below the upper edge of door 9B approximately parallel to the upper edge of door 9B in an unlocked position. The handle receiver h82 is positioned horizontally, with the mounting base 821 attached to the upper center of the front frame of the housing 9A by mounting screws, and the hook receiver 822 is positioned at the upper center of the front frame of the housing 9A, with its roughly L-shaped tip pointing downwards, so that the hook 812 of the door 9B's sealing handle h81 can be engaged and disengaged.

[0006] In this way, when opening the door 9B of this equipment, the handle lever 813 is grasped and rotated from a nearly horizontal locked position to a nearly vertical unlocked position to disengage the hook 812 from the hook receiving portion 822 of the handle receiver h82, and the door 9B is pulled down. When closing the door 9B, the handle lever 813 is grasped and the door 9B is pushed upward toward the front of the housing 9A and fitted into the recess 91 on the front of the housing 9A. In this state, the handle lever 813 is rotated from the unlocked position to the locked position to engage the hook 812 with the hook receiving portion 822 of the frame of the housing 9A. By engaging the hook 812 with the hook receiving portion 822 in this way, the door 9B is further pushed into the recess 91, and the pressure of the door 9B compresses the packing 92 around the entire periphery of the opening 90 of the housing 9A, and (due to the reaction force of the packing 92) the opening 90 of the housing 9A is completely sealed, and this sealed state is maintained. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Patent Publication No. 2014-098240 [Overview of the Initiative] [Problems that the invention aims to solve]

[0008] Incidentally, with such doors, as long as the gasket around the entire perimeter of the opening of the housing is new, the reaction force of the gasket acts to try to open the door, and the hook of the door handle attached to the door and the hook receiving part of the handle receiver attached to the housing engage strongly with each other (in other words, they interlock (press against each other) with great pressure), thus maintaining the locked state of the door and keeping the handle lever in a horizontal position. However, as the packing deteriorates over time, the resilience of the reaction force decreases, which also reduces the strong engagement between the hook of the door handle and the hook receiving part of the handle receiver, i.e., the interlocking (pressing) under great pressure. This causes the handle lever in the locked position to be unable to withstand its own weight, causing it to droop. If the handle lever droops too far, the hook can detach from the hook receiving part, causing the door to open. In conventional sealed handle devices of this type, a corrugated washer or the like is interposed between the base-side rotating shaft and the hook-side rotating shaft to maintain the horizontal position of the handle lever in the locked position. However, due to repeated rotation of the handle lever, this washer is repeatedly deformed and loosens over time, making the same problems as described above unavoidable.

[0009] Furthermore, since door handles and handle receivers are manufactured from metal materials such as stainless steel, there is an undesirable problem in that the metal hook and the metal hook receiver rub against each other each time the door is opened and closed, generating metal dust between the hook and the hook receiver.

[0010] The present invention solves these conventional problems and aims to reliably hold the handle lever in the locked position in this type of sealing handle device, thereby reliably engaging the hook and the hook receiver, and thereby reliably sealing the housing with the door, and also to prevent the generation of metal powder due to friction between the hook and the hook receiver. [Means for solving the problem]

[0011] To achieve the above objective, the present invention A sealing handle device comprising a handle base, a hook rotatably connected to the handle base via a pivot shaft, and a handle lever for rotating the hook, and a handle receiver having a hook receiving portion that can engage with the hook of the sealing handle, wherein the pivot shaft is rotatably disposed within the handle base and its tip protrudes from the front surface of the handle base, a handle lever side pivot shaft portion protrudes coaxially from the handle lever relative to the base side pivot shaft portion, and a hook side pivot shaft portion provided on the hook and operably connected between the base side pivot shaft portion and the handle lever side pivot shaft portion, wherein one of the sealing handle or the handle receiver is attached to the door side and the other is attached to the frame side around the opening of the housing, and the engagement of the hook of the sealing handle and the hook receiving portion of the handle receiver causes the door to be brought into close contact with the frame around the opening of the housing and seals the opening of the housing, Within the handle base, a leaf spring is provided so as to be able to press against the circumferential surface of the base-side rotating shaft portion around the rotation of the base-side rotating shaft portion, at least in a state where the hook of the sealing handle and the hook receiving portion of the handle receiver are engaged. The leaf spring has a flat pressing surface that can be pressed against the circumferential surface of the base-side rotating shaft portion, and the circumferential surface of the base-side rotating shaft portion has a flat pressure-receiving surface that receives the pressing surface of the leaf spring, and the pressing surface of the leaf spring and the pressure-receiving surface of the base-side rotating shaft portion are formed such that one of the pressing surface of the leaf spring and the pressure-receiving surface of the base-side rotating shaft portion can contact the other at an oblique angle in the engagement direction between the sealing handle and the handle receiver. The leaf spring maintains the engaged state between the hook and the hook receiving portion. This is the gist of it.

[0012] This sealing handle device also preferably has the following configuration: (1 ) Within the handle base, a leaf spring is provided around the rotation of the base-side rotating shaft portion, and in a state where the hook of the sealing handle and the hook receiving portion of the handle receiver are not engaged, so as to be able to press against the circumferential surface of the base-side rotating shaft portion. The leaf spring has a flat pressing surface that can press against the circumferential surface of the base-side rotating shaft portion, and the circumferential surface of the base-side rotating shaft portion has a flat pressure-receiving surface that receives the pressing surface of the leaf spring. The pressing surface of the leaf spring and the pressure-receiving surface of the base-side rotating shaft portion are formed so as to be able to contact each other parallel to each other, or so as to be able to have one of the pressing surface of the leaf spring and the pressure-receiving surface of the base-side rotating shaft portion contact the other at an angle in the direction of non-engagement between the sealing handle and the handle receiver. ( 2 An attachment made of synthetic resin is laminated and mounted on the surface of the hook receiving part of the handle receiver where the hook makes contact. ( 3 An attachment made of synthetic resin is laminated and mounted on the surface of the hook receiving portion of the handle receiver that the hook contacts, and a guide surface is formed on the surface of the attachment that contacts the hook, which is capable of guiding the hook to the hook to its proper engagement position. ( 4 The handle base has a rotating shaft on the base side, the handle lever has a rotating shaft on the handle lever side, and the hook has a rotating shaft on the hook side, each having a shaft insertion hole at its axis, the rotating shaft on the base side, the rotating shaft on the handle lever side, and the rotating shaft on the hook side are operably connected by a connecting shaft inserted between each of the shaft insertion holes, the shaft insertion hole on the hook side of the rotating shaft is formed as an elongated hole that is long toward the engagement end of the hook with respect to the hook receiving part of the handle receiving part, and the rotating shaft on the hook side and the rotating shaft on the base side and the handle lever side Each connecting surface with the rotating shaft portion has a plurality of recesses or protrusions along the periphery of the elongated hole, and the base-side rotating shaft portion and the handle lever side Each connecting surface of the rotating shaft portion with the hook-side rotating shaft portion has a plurality of protrusions or recesses that can selectively engage with the plurality of recesses or protrusions on each connecting surface of the hook-side rotating shaft portion, and the hook is inserted through the shaft hole By adjusting the insertion position of the connecting shaft in the elongated hole, the engagement between the connecting shaft and the hook is achieved. If The length between the ends is adjustable, and the connecting shaft is positioned within the elongated hole so that the connecting surfaces of the hook-side rotating shaft, the base-side rotating shaft, and the handle lever-side rotating shaft can be fixed together by the engagement of their respective recesses and protrusions, thereby allowing the engagement position between the hook and the hook receiving portion to be adjusted. [Effects of the Invention]

[0013] According to the sealed handle device of the present invention, with the above configuration, the leaf spring is used to hold at least the engaged state between the hook and the hook receiving portion. Therefore, at least the handle lever is securely held in the locked position to ensure the engagement between the hook and the hook receiving portion, thereby achieving the unique and remarkable effect of the present invention that the door can securely seal the housing. In this sealing handle device, the leaf spring has a flat pressing surface that can be pressed against the circumferential surface of the rotating shaft on the base side, and the circumferential surface of the rotating shaft on the base side has a flat pressure-receiving surface that receives the pressing surface of the leaf spring. The pressing surface of the leaf spring and the pressure-receiving surface of the rotating shaft on the base side are formed so that one of them contacts the other at an angle in the direction of engagement between the sealing handle and the handle receiver. This increases the pressure applied to the circumferential surface of the rotating shaft on the base side, which can more reliably hold the handle lever in the locked position and the engagement between the hook and the hook receiver, thereby providing the advantage of more reliably sealing the housing with the door. In addition, in the sealed handle device of the present invention, an attachment made of synthetic resin is laminated and attached to the surface where the hook of the hook receiving portion of the handle receiver contacts. Therefore, it has the remarkable and unique effect of the present invention that the generation of metal powder due to the rubbing between the hook and the hook receiving portion can be prevented.

Brief Description of the Drawings

[0014] [Figure 1] Figure showing the appearance of the sealed handle device according to an embodiment of the present invention ((a) is a plan view, (b) is a front view, (c) is a side view) [Figure 2] Figure showing the configuration of the sealed handle device ((a) is a plan sectional view, (b) is a side sectional view) [Figure 3] Figure showing the configuration of the sealed handle device (rear view) [Figure 4] Figure showing the configuration of the sealed handle device, especially the configuration of the pedestal side rotation shaft portion ((a) is a rear view, (b) is a side view) [Figure 5] Figure showing the configuration of the sealed handle device, especially the configuration of the handle lever and the handle lever side rotation shaft portion ((a) is a side view, (b) is a rear view) [Figure 6] Figure showing the configuration of the sealed handle device, especially the configuration of the hook and the hook side rotation shaft portion ((a) is a rear view, (b) is a side view, (c) is a side sectional view) [Figure 7] Figure showing the length adjustment function of the hook of the sealed handle device ((a) is the state where the hook is shortened, (b) is the state where the hook is lengthened) [Figure 8] Figure showing the configuration of the handle receiver of the sealed handle device (perspective view) [Figure 9]This figure shows the configuration of the attachment used in the handle receiver of the sealed handle device ((a) is a perspective view, (b) is a side view). [Figure 10] The diagram shows an example of the use of the sealed handle device ((1-1) is a front view, (1-2) is a side cross-sectional view, and (2) is a partially abbreviated front view). [Figure 11] This diagram shows the configuration of a conventional sealed handle device ((a) is a front view, (b) is a side cross-sectional view). [Figure 12] This diagram (perspective view) shows the configuration of the handle receiver in particular of the sealed handle device. [Figure 13] The diagram shows an example of the use of the sealed handle device ((1-1) is a front view, (1-2) is a side cross-sectional view, and (2) is a partially abbreviated front view). [Modes for carrying out the invention]

[0015] Next, embodiments for carrying out this invention will be described with reference to the figures. Figures 1, 2, and 3 show the overall configuration of the sealing handle device. Figures 4 to 9 show the configuration of the main parts of the sealing handle device, respectively.

[0016] As shown in Figure 1, the sealing handle device H (hereinafter referred to as "this device H") is configured to include a sealing handle h1 and a handle receiver h2. The sealing handle h1 consists of a handle base 1, a hook 2 rotatably connected to the handle base 1 via a rotating shaft 4, and a handle lever 3 for rotating the hook 2. The rotating shaft 4, as shown in Figure 2, is rotatably arranged within the handle base 1 and consists of a base-side rotating shaft portion 11 whose tip protrudes from the front surface of the handle base 1, a handle lever-side rotating shaft portion 31 that protrudes coaxially with respect to the base-side rotating shaft portion 11 on the handle lever 3, and a hook-side rotating shaft portion 21 provided on the hook 2 and operably connected between the base-side rotating shaft portion 11 and the handle lever-side rotating shaft portion 31. As shown in Figures 1 and 2, the handle receiver h2 has a hook receiver portion 6 that can engage with the hook 2 of the sealing handle h1. Thus, the device H employs a system in which one of the sealing handle h1 or the handle receiver h2 is attached to the door side, and the other is attached to the frame side around the opening of the housing, and the door is pressed tightly against the frame around the opening of the housing by the engagement of the hook 2 of the sealing handle h1 and the hook receiving portion 6 of the handle receiver h2, thereby sealing the opening of the housing.

[0017] In this device H, in particular, as shown in Figure 2, a leaf spring 7 is provided within the handle base 1 around the rotation of the base-side rotating shaft portion 11 so as to be able to press against the circumferential surface of the base-side rotating shaft portion 11 while the hook 2 of the sealing handle h1 and the hook receiving portion 6 of the handle receiver h2 are engaged. This leaf spring 7 maintains the engaged state between the hook 2 and the hook receiving portion 6. Furthermore, in this device H, a leaf spring 7 is provided within the handle base 1 around the rotation of the base-side rotating shaft portion 11, and is capable of being pressed against the circumferential surface of the base-side rotating shaft portion 11 when the hook 2 of the sealing handle h1 and the hook receiving portion 6 of the handle receiver h2 are not engaged. This leaf spring 7 maintains the unengaged state between the hook 2 and the hook receiving portion 6.

[0018] As previously described, the sealing handle h1 of this device H comprises a handle base 1, a hook 2, and a handle lever 3, and the hook 2 and handle lever 3 are operably connected to the handle base 1 via a rotating shaft 4.

[0019] As shown in Figure 2, the handle base 1 is a plate having a rotating shaft insertion hole 10 through which the rotating shaft 4 can be inserted. In this case, the handle base 1 is formed in a shallow case shape with the entire rear surface open, and consists of a front part 1F and a surrounding circumferential surface part 1S. As shown in Figure 1, the front part 1F is a composite shape consisting of a roughly rectangular and a roughly trapezoidal shape when viewed from the front, more specifically, a roughly rectangular part and a trapezoidal part that extends from one side with gradually decreasing length, and as a whole it has a hexagonal shape. The front part 11 is a roughly cylindrical shape in which the center of the rectangular part when viewed from the front protrudes slightly above the surrounding surface, and the tip surface (hereinafter referred to as the central surface) is formed flat, and the rotating shaft insertion hole 10 is formed in the center of this central surface. The surfaces around the central surface of the front part 1F (around the cylindrical shape) are tapered toward the circumferential surface part 1S which has 6 sides. In this case, the circumferential surface portion 1S consists of six side portions, each of which is roughly trapezoidal or rectangular in side view, and the entire circumference is tapered, gradually increasing in diameter. The rotating shaft insertion hole 10 is circularly opened on the central surface, that is, the central cylindrical end surface of the handle base 1. Furthermore, as shown in Figure 2, this rotating shaft insertion hole 10 is formed in a cylindrical shape inside the central cylindrical shape of the handle base 1, with the front side being smaller in diameter and the rear side being larger in diameter, and a stepped surface 10G is provided between the front and rear sides. The base-side rotating shaft portion 11, which forms part of the rotating shaft 4, is rotatably inserted and arranged within this rotating shaft insertion hole 10. This base-side rotating shaft portion 11 will be described later.

[0020] As shown in Figure 1, the handle base 1 is provided with a plurality of screw insertion holes S0 for mounting screws. In this case, on the front portion 1F, a total of three screw insertion holes S0 are formed, one at each end of the rectangular portion in front view and one in the center of the trapezoidal portion in front view. As shown in Figure 3, these screw insertion holes S0 are formed as boss holes inside the handle base 1. Of these boss holes, a part of the outer surface of the boss of the boss hole provided in the trapezoidal portion in front view engages with the projection 11I of the rotating shaft 4 (described later) to form one stopper 111 that restricts the rotation range of the handle lever 3. In addition, a protrusion is formed at a predetermined position in the longitudinal middle of the rectangular portion of the front portion 1F, opposite to the side with the trapezoidal portion in front view, so that it can engage with the projection 11I of the rotating shaft 4 (described later), and this forms the other stopper 112 that restricts the rotation range of the handle lever 3.

[0021] The handle base 1 is also provided with a leaf spring mounting portion 113 for attaching a leaf spring 7, which will be described later, as shown in Figure 3. In this case, the leaf spring mounting portion 113 is formed inside the front portion 1F, between one of the boss holes at both ends of the rectangular portion of the front portion 1F in a front view—in this case, the boss hole facing the pivot end of the handle lever 3 described later—and the rotating shaft insertion hole 10, and is close to the rotational trajectory of the pivot end of the handle lever 3, extending from the other side of the rectangular portion in a front view toward one side, so that both ends of the leaf spring 7 can engage with it.

[0022] The leaf spring 7 used in this device H has a pressure surface 7P that can be pressed against the circumferential surface of the rotation axis 4 of the handle lever 3. In this case, the leaf spring 7 is made of a metal material such as stainless steel, has a U-shaped cross-section, and consists of a central pressure surface portion 71 and support portions 72 on both sides thereof. A leaf spring 7 with a C-shaped cross-section is also available and can be used selectively as appropriate. In this leaf spring 7, the support portions 72 on both sides are inserted into both ends of the leaf spring mounting portion 113 of the handle base 1, that is, the portion with a roughly hook-shaped cross-section that extends from one side to the other side of the rectangular portion when viewed from the front, and the central pressure surface portion 71 is positioned so that its outer surface (the surface facing the pivot point of the handle lever 3) is the pressure surface 7P, and it faces the rotational trajectory of the end of the handle lever 3 on the pivot point side.

[0023] As shown in Figure 2, the hook 2 has a hook-side rotating shaft portion 21 at one end that forms part of the rotating shaft 4, and a claw 22 at the other end that can engage with the hook receiving portion 6 of the handle receiving portion h2. The hook-side rotating shaft portion 21 is formed in a cylindrical shape and has a rotating shaft insertion hole 20 at its axis. This hook-side rotating shaft portion 21 will be described later. The claw 22 is a plate that extends integrally from a part of the circumferential surface of the hook-side rotating shaft portion 21. In this case, it is roughly rectangular in front view and is formed to a predetermined size and thickness, along with the size and thickness of the hook receiving portion of the handle receiving portion h2.

[0024] As shown in Figures 1 and 2, the handle lever 3 has a handle lever-side rotating shaft portion 31 at one end that forms part of the rotating shaft 4, and a grip 32 at the other end. The handle lever-side rotating shaft portion 31 is formed in a cylindrical shape and has a shaft insertion hole 30 at its center. This handle lever-side rotating shaft portion 31 will be described later. The grip 32 is a plate that extends integrally from a part of the circumferential surface of the handle lever-side rotating shaft portion 31, and in this case, it is formed in a roughly elongated rectangle in front view to a predetermined size and thickness. The front and back surfaces of the grip 32 are partially given the required radius.

[0025] As shown in Figure 2, the rotating shaft 4 consists of a base-side rotating shaft portion 11 rotatably arranged within the handle base 1, with its tip protruding from the front surface 1F of the handle base 1; a handle lever-side rotating shaft portion 31 that protrudes coaxially from the base-side rotating shaft portion 11 on the handle lever 3; and a hook-side rotating shaft portion 21 provided on the hook 2 and operably connected between the base-side rotating shaft portion 11 and the handle lever-side rotating shaft portion 31. The base-side rotating shaft portion 11 of the handle base 1, the handle lever-side rotating shaft portion 31 of the handle lever 3, and the hook-side rotating shaft portion 21 of the hook 2 have shaft insertion holes 10, 20, and 30 on their axes, and these base-side rotating shaft portion 11, handle lever-side rotating shaft portion 31, and hook-side rotating shaft portion 21 are operably connected by a connecting shaft B inserted between the respective shaft insertion holes 10, 20, and 30.

[0026] Furthermore, as shown in Figure 6, the shaft insertion hole 20 of the hook-side rotating shaft portion 21 is formed as an elongated hole 20 that is long in the direction of the engagement end of the handle receiver h2 of the hook 2 with respect to the hook receiver portion 6, and the base-side rotating shaft portion 11 of the hook-side rotating shaft portion 21 and the handle lever side Each connecting surface 201, 202 with the rotating shaft portion 31 has a plurality of recesses 2010 along the periphery of the elongated hole 20, as shown in Figures 4 and 5, the base-side rotating shaft portion 11 and the handle lever side The connecting surfaces 101 and 301 of the rotating shaft portion 31 with the hook-side rotating shaft portion 21 have multiple protrusions 1011 and 3011, respectively, which can selectively engage with multiple recesses 2010 on the connecting surfaces 201 and 202 of the hook-side rotating shaft portion 21. In this way, as shown in Figure 7, the insertion position of the connecting shaft B is adjusted in the elongated hole 20 that forms the shaft insertion hole 20 of the hook 2, thereby adjusting the relationship between the connecting shaft B and the hook 2. If The length between the ends is adjustable, and the connecting shaft B in the elongated hole 20 is positioned to be inserted through the connecting shaft. The connecting surfaces 201 and 202 of the hook-side rotating shaft portion 21 and the connecting surfaces 101 and 301 of the base-side rotating shaft portion 11 and the handle lever-side rotating shaft portion 31 are fixed together by engagement with their respective recesses 2010 (see Figure 6) and protrusions 1011 and 3011 (see Figures 4 and 5), thereby allowing the engagement position between the hook 2 and the hook receiving portion 6 to be adjusted.

[0027] As shown in Figure 4, the base-side rotating shaft portion 11 is made of a cylindrical block that can be inserted into and positioned in the rotating shaft insertion hole 10 of the handle base 1 and can rotate within the rotating shaft insertion hole 10, and has a shaft insertion hole 110 at its axis. In this case, the base-side rotating shaft portion 11 is formed such that the front end of the front portion protrudes from the opening in the central surface of the handle base 1 and can be fitted into the small-diameter front portion of the rotating shaft insertion hole 10, and the rear portion is formed such that it can be fitted into the large-diameter rear portion of the rotating shaft insertion hole 10. Thus, the base-side rotating shaft portion 11 is provided with a stepped surface 11G between the front and rear portions, and this stepped surface 11G is formed to be able to engage with the stepped surface 10G between the front and rear portions of the rotating shaft insertion hole 10. Furthermore, in this base-side rotating shaft portion 11, the front end portion on the front side is formed as a roughly rounded square in cross-section that is inscribed within the front cross-sectional shape (circular cross-section) so that it can engage (fit) with the connecting surface 201 (groove 200A) of the hook 2 described later, and four protrusions 1011 are formed at 90° intervals around the shaft insertion hole 110 on its front surface (the tip surface of the base-side rotating shaft portion 11). In this case, these protrusions 1011 are formed in a hemispherical shape.

[0028] The circumferential surface of the base-side rotating shaft portion 11 further includes a projection 11I for restricting the rotation range of the handle lever 3, and a pressurized surface that can engage with a leaf spring 7, described later, provided inside the handle base 1. 114 is established.

[0029] The projection 11I is formed protruding from the outer circumferential surface of the large-diameter rear side of the base-side rotating shaft portion 11. In this case, the projection 11I is integrally formed as a convex rectangular parallelepiped shape on a part of the outer circumferential surface of the rear side of the base-side rotating shaft portion 11.

[0030] The pressure-receiving surface 114 is a flat surface on the circumferential surface of the base-side rotating shaft portion 11 that receives the pressure surface 7P of the leaf spring 7, which will be described later. In addition, two pressure-receiving surfaces 114 are provided on the circumferential surface of the base-side rotating shaft portion 11. In this case, each pressure-receiving surface 114A and 114B is formed on a part of the large-diameter rear outer circumferential surface of the base-side rotating shaft portion 11, approximately opposite the projection 11I (slightly shifted to one side rather than being directly opposite), with an arc-shaped surface 114C formed parallel to this outer circumferential surface and slightly smaller in diameter than this outer circumferential surface, and tapered flat surfaces are formed on both sides of this arc-shaped surface 114C. Each pressurized surface 114A, 114B may be formed so as to be parallel to each other and in contact with the pressurized surface 7P of the leaf spring 7. In this case, one of the pressurized surfaces 114A, 114B of the base-side rotating shaft portion 11 is formed at an angle so as to be able to contact the other at an angle in the engagement direction between the sealing handle h1 and the handle receiver h2, with respect to the other, and the space between the outer peripheral surface of the rear side of the base-side rotating shaft portion 11 gradually widens slightly from both sides of the arc-shaped surface 114C. Thus, one pressurized surface 114A, which is closer to the projection 11I, is formed so as to be able to maintain the engaged state between the hook 2 and the hook receiver portion 6, that is, for locking the sealing handle h1 and the handle receiver h2, and the other pressurized surface 114B, which is further from the projection 11I, is formed so as to be able to maintain the disengaged state between the hook 2 and the hook receiver portion 6, that is, for unlocking the sealing handle h1 and the handle receiver h2.

[0031] As shown in Figure 5, the handle lever side rotating shaft portion 31 is a cylindrical block shape with a shaft insertion hole 30 at its axis. In this case, the handle lever side rotating shaft portion 31 is formed as a cylindrical shape with substantially the same diameter as or slightly larger than the rear side of the base side rotating shaft portion 11. The front end of this handle lever side rotating shaft portion 31 is formed to be substantially the same size and shape as the front end of the base side rotating shaft portion 11. That is, the front end is formed as a substantially rounded square in cross-section that is inscribed within the cross-sectional shape (circular) of the handle lever side rotating shaft portion 31 so as to be able to engage (fit) with the connecting surface 202 (groove 200B) of the hook 2 described later, and four protrusions 3011 are formed at 90° intervals around the shaft insertion hole 30 on its front surface (tip surface of the handle lever side rotating shaft portion 31). In this case, these protrusions 3011 are formed in a hemispherical shape. The shaft insertion hole 30 is cylindrical in shape with the same diameter as the front side of the shaft insertion hole 10 of the base-side rotating shaft portion 11, and is formed as a threaded hole 30 by cutting threads on its inner circumferential surface.

[0032] As shown in Figure 6, the hook-side rotating shaft portion 21 is a cylindrical block shape with a shaft insertion hole 20 at its axis. In this case, the shaft insertion hole 20 of the hook-side rotating shaft portion 21 is formed as an elongated hole 20 that is long in the direction of the engagement end of the handle receiver h2 of the hook 2 with respect to the hook receiver portion 6, so that the hook-side rotating shaft portion 21 is formed as a cylindrical shape with an elliptical cross-section. One of the front and rear surfaces of this hook-side rotating shaft portion 21 is the connecting surface 201 of the base-side rotating shaft portion 11, and the other is the connecting surface 202 of the handle lever-side rotating shaft portion 31.

[0033] A rectangular groove 200A with rounded corners in cross-section is formed at the center of the connecting surface 201 of the hook-side rotating shaft portion 21 to the base-side rotating shaft portion 11, so that the front end of the base-side rotating shaft portion 11 can be fitted into it. The groove 200A has a rectangular groove 200A that is slightly longer in the major axis direction of the elongated hole 20 than the front end of the base-side rotating shaft portion 11. An elongated hole 20, which serves as a shaft insertion hole 20, is provided at the center of the bottom surface of this groove 200A. Multiple recesses 2010 are provided on the bottom surface of this groove 200A along the periphery of the elongated hole 20 so that multiple, in this case, four protrusions 1011 of the base-side rotating shaft portion 11 can selectively engage with them. In this case, the multiple recesses 2010 are formed radially on the bottom surface of the groove 200A, one on each side in the longitudinal direction of the elongated hole 20 and three in parallel on each side in the short direction. These recesses 2010 are formed in a semicircular cross-section.

[0034] Furthermore, at the center of the connecting surface 202 of the hook-side rotating shaft portion 21 with the handle lever-side rotating shaft portion 31, a rectangular groove 200B with rounded corners in cross-section is formed, similar to the connecting surface 201 of the base-side rotating shaft portion 11, so that the front end of the handle lever-side rotating shaft portion 31 can be fitted into it. The groove 200B has a long hole 20, which serves as a shaft insertion hole 20, at the center of its bottom surface. Then, similar to the connecting surface 201 of the base-side rotating shaft portion 11, multiple recesses 2010 are provided on the bottom surface of the groove 200B along the periphery of the long hole 20, so that multiple, in this case, four, protrusions 3011 of the handle lever-side rotating shaft portion 31 can selectively engage with them. In this case, the multiple recesses 2010 are formed radially on the bottom surface of the groove 200B, one on each side in the longitudinal direction of the long hole 20 and three in parallel on each side in the short direction. These recesses 2010 are formed in a semicircular cross-section.

[0035] As shown in Figure 2, a bolt B is used as the connecting shaft B to connect the base-side rotating shaft portion 11, the handle lever-side rotating shaft portion 31, and the hook-side rotating shaft portion 21 within the handle base 1. In this case, the bolt B is inserted through the shaft insertion hole 110 of the base-side rotating shaft portion 11 within the handle base, and then tightened through the shaft insertion hole 20 of the hook-side rotating shaft portion 21 into the screw hole 30 of the handle lever-side rotating shaft portion 31, thereby connecting and fixing the entire rotating shaft 4.

[0036] As shown in Figures 1, 2, and 8, the handle receiver h2 of this device H has a mounting base 5 and a hook receiver 6.

[0037] The mounting base 5 consists of a plate substantially similar to that of the handle base 1. In this case, the mounting base 5 is formed in a shallow case shape with the entire rear surface open, and consists of a front portion 5F and a surrounding circumferential portion 5S. The front portion 5F is a composite shape consisting of a substantially rectangular and a substantially trapezoidal shape when viewed from the front, more specifically, a substantially rectangular portion and a trapezoidal portion that gradually decreases in length from one side, and as a whole it exhibits a hexagonal shape. The front portion 5F is also tapered from its center toward the circumferential portion 5S, which consists of six sides. In this case, the circumferential portion 5S consists of six side portions, each of which is substantially trapezoidal or substantially rectangular when viewed from the side. The mounting base 5 is provided with a plurality of screw insertion holes S0 for mounting screws. In this case, in the front portion 5F, three screw insertion holes S0 are formed in total, at both ends of the rectangular portion when viewed from the front and in the center of the trapezoidal portion when viewed from the front. These screw insertion holes S0 are formed as boss holes inside the mounting base 5.

[0038] The hook receiving portion 6 is integrally provided in the center of the mounting base 5. In this case, the hook receiving portion 6 is formed in a substantially L-shape in cross-section and consists of a support portion 61 that extends perpendicularly in a substantially square shape from the center of the mounting base 5 and a locking portion 62 that extends from the tip of the support portion 61 toward the other side of the substantially rectangular portion of the mounting base 5 when viewed from the front. A screw hole 610 is provided in the support portion 61 at a predetermined height in the center in the width direction.

[0039] An attachment A made of synthetic resin is laminated and attached to the handle receiver h2 on the surface of the hook receiver 6 that the hook 2 contacts. As shown in Figure 9, this attachment A has a locking surface covering portion a1 that can be attached to the locking surface of the hook 2 on the locking portion 62 of the hook receiver 6, and a support portion inner surface covering portion a2 that can be attached to the inner surface of the support portion 61, which is continuous with the locking surface, and these locking surface covering portion a1 and support portion inner surface covering portion a2 are formed integrally. The locking surface covering portion a1 consists of a flat plate portion a11 that covers the locking surface of the hook 2 on the locking portion 62 of the hook receiver 6, and three side portions a12 that rise from the three side edges of the flat plate portion a11 and surround the three sides of the locking portion 62. The locking surface covering portion a1 also has a guide surface a11G formed on the surface that the hook 2 contacts that can guide the hook 2 to the correct engagement position of the hook 2. In this case, the guide surface a11G is formed in the center of the surface of the locking surface covering a1 that receives the hook 2, with a hook engagement portion a110 formed in a concave shape with a substantially inverted U-shaped cross-section into which the hook 2 can be fitted, and both sides of the hook engagement portion a110 are formed in a convex shape with a substantially U-shaped cross-section, with hook guide portions a111 on both sides that guide the hook 2 to the hook engagement portion a110. The inner surface covering portion a2 of the support portion consists of a flat plate portion a21 that covers the inner surface of the support portion 61 of the hook receiving portion 6, and two side portions a22 that rise from the two side edges of the flat plate portion a21 and surround the two sides of the support portion 61. The inner surface covering portion a2 of the support portion is provided with a screw insertion hole a20 at a predetermined height in the center in the width direction so as to be able to communicate with the screw hole 610 of the support portion 61. In this way, attachment a is attached to the hook receiving portion 6 by having the locking surface covering portion a1 attached to the locking surface of the hook 2 of the locking portion 62 of the hook receiving portion 6, including the three sides of the locking portion 62, and by having the inner surface covering portion a2 attached to the inner surface of the support portion 61 of the hook receiving portion 6, including the two sides of the support portion 61, and by having the screw S passed through the screw insertion hole a20 of the inner surface covering portion a2 and tightened into the screw hole 610 of the support portion 61.

[0040] In this manner, one of the sealing handle h1 or the handle receiver h2 is attached to the frame side around the opening of the housing by mounting screws, and the other is attached to the door side by mounting screws. Furthermore, during this attachment, the engagement position between the hook 2 and the hook receiver 6 can be adjusted as needed. In this case, the length between the connecting shaft B and the locking end of the hook 2 is adjusted by adjusting the insertion position of the connecting shaft B in the elongated hole 20 that forms the shaft insertion portion 20 of the hook 2. Then, in accordance with the insertion position of the connecting shaft B in the elongated hole 20, the connecting surfaces 201, 202 of the hook-side rotating shaft portion 21 and the connecting surfaces 101, 301 of the base-side rotating shaft portion 11 and the handle lever-side rotating shaft portion 31 engage their respective recesses 2010 and protrusions 1011, 3011 with each other, and fix this state. In this case, the bolt B of the connecting shaft B is tightened into the screw hole 30 of the handle lever-side rotating shaft portion 31 to fix the entire rotating shaft 4.

[0041] Furthermore, the leaf spring 7, positioned around the rotation of the base-side rotating shaft 11 within the handle base 1, maintains the locked state (engaged state) between the hook 2 of the sealing handle h1 and the hook receiving portion 6 of the handle receiver h2, thereby pressing the door tightly against the frame around the opening of the housing and sealing the opening of the housing. Additionally, the leaf spring 7 maintains the unlocked state (unengaged state) between the hook 2 of the sealing handle h1 and the hook receiving portion 6 of the handle receiver h2, so that the hook 2 does not interfere with the opening and closing of the door, allowing the door to be opened and closed smoothly.

[0042] Figure 10 shows an example of the use of this device H in equipment where airtightness of the door is required. In this example as well, the equipment housing 9A is box-shaped, with a rectangular recess 91 formed on its front, and a rectangular opening 90 formed on the back surface of this recess 91. A packing 92 is provided along the entire periphery of the opening 90 within this front recess 91. In this case, the area outside the recess 91 on the front of the housing 9 forms the frame of the housing 9 to which either a sealing handle h1 or a handle receiver 2 is attached. The door 9B is rectangular in shape so as to be fitted into the recess 91 on the front of the housing 9A, and is formed to a thickness corresponding to the depth of the recess 91. This door 9B is mounted so as to be rotatable vertically toward the front of the housing 9A via a pair of hinges 93 between the lower front of the door 9B and the lower front frame of the housing 9A.

[0043] In this setup, a sealing handle h1 is attached to the upper center of the front of door 9B, and a handle receiver h2 is attached to the upper center of the front frame of housing 9A. In this case, the sealing handle h1 is positioned horizontally, with the handle base 1 attached to the upper center of the front of door 9B by mounting screws, and the handle lever 3 is rotatably positioned between a locked position, where the length of the handle lever 3 is oriented parallel to the upper edge of door 9B as shown in Figure 10(2), and the hook 2 protrudes above the upper edge of door 9B approximately perpendicular to the upper edge of door 9B, and an unlocked position, where the length of the handle lever 3 is oriented perpendicular to the upper edge of door 9B, and the hook 2 is retracted below the upper edge of door 9B approximately parallel to the upper edge of door 9B. The handle receiver h2 is positioned horizontally, with the mounting base 5 attached to the upper center of the front frame of the housing 9A by mounting screws, and the hook receiver 6 is positioned at the upper center of the front frame of the housing 9A, with its roughly L-shaped tip pointing downwards, so that the hook 2 of the door 9B's sealing handle h1 can be engaged with and disengaged from the hook receiver 6.

[0044] Furthermore, the engagement position between the hook 2 and the hook receiving portion 6 can be adjusted as needed. In other words, the hook 2 can be extended or retracted. The adjustment is as described above, and more specifically, it is as follows. Please refer to Figure 7. To extend the hook 2, as shown in Figure 7(b), the bolt B is inserted into the end of the hook 2 opposite to the claw 22 within the elongated hole 20 that forms the shaft insertion hole 20 of the hook 2. In line with the insertion position of the bolt B within the elongated hole 20, the connecting surfaces 201, 202 of the hook-side rotating shaft portion 21 and the connecting surfaces 101, 301 of the base-side rotating shaft portion 11 and the handle lever-side rotating shaft portion 31 are engaged with their respective recesses 2011 (see Figure 6) and protrusions 1011 (see Figure 4) and 3011 (see Figure 5). This state is then fixed by tightening the bolt B into the threaded hole 30 of the handle lever-side rotating shaft portion 31. To retract the hook 2, as shown in Figure 7(a), the hook 2 can be retracted by inserting the bolt B into the end of the hook 2 on the claw side within the elongated hole 20 that forms the shaft insertion hole 20 of the hook 2. In line with the insertion position of the bolt B within the elongated hole 20, the connecting surfaces 201, 202 of the hook-side rotating shaft portion 21 and the connecting surfaces 101, 301 of the base-side rotating shaft portion 11 and the handle lever-side rotating shaft portion 31 are engaged with their respective recesses 2011 (see Figure 6) and protrusions 1011 (see Figure 4) and 3011 (see Figure 5). This state is then fixed by tightening the bolt B into the screw hole 30 of the handle lever-side rotating shaft portion 31. To extend hook 1 to an intermediate position, bolt B is inserted midway through the elongated hole 20 forming the shaft insertion hole 20 of hook 2, thereby extending hook 2 to an intermediate position. In line with the insertion position of bolt B in the elongated hole 20, the connecting surfaces 201 and 202 of the hook-side rotating shaft portion 21 and the connecting surfaces 101 and 301 of the base-side rotating shaft portion 11 and the handle lever-side rotating shaft portion 31 are engaged with each other's recesses 2010 and protrusions 1011 and 3011, and this state is fixed by tightening bolt B into the screw hole 30 of the handle lever-side rotating shaft portion 31.

[0045] In this way, when opening the door 9B of this equipment, as shown in Figure 10(1-1), the handle lever 3 is grasped, and as shown in Figure 10(2), the handle lever 3 is rotated from a substantially horizontal locked position to a substantially vertical unlocked position. As a result, the hook 2 rotates away from the hook receiving portion 6 of the handle receiver h2, and is smoothly released by the guide surface a11G (see Figure 9(b)) of the locking surface covering portion a1 of the attachment A (see Figure 8) attached to the hook receiving portion 6, that is, guided from the central hook engaging portion a110 to the hook guide portion a111 on one side thereof. Simultaneously, within the handle base 1, (see Figure 3) the base-side rotating shaft portion 11 rotates in the same direction as the handle lever 3, contacting the pressurized surface 7P of the leaf spring 7 of the leaf spring mounting portion 113. One of the pressurized surfaces 114A on the outer circumference of the base-side rotating shaft portion 11, which is close to the projection 11I, disengages from the pressurized surface 7P of the leaf spring 7. The pressurized surface 7P of the leaf spring 7 engages with the arc-shaped surface 114C on the outer circumference of the base-side rotating shaft portion 11, and the pressurized surface portion 71 of the leaf spring 7 is pushed up by the arc-shaped surface 114C.

[0046] Then, as shown in Figure 10(2), when the handle lever 3 is rotated to the nearly vertical unlocked position, (see Figure 3) the rotation of the handle lever 3 in the same direction is restricted by the abutment engagement between the projection 11I of the base-side rotating shaft portion 11 and the other stopper 112. At the same time, the hook 2 is completely disengaged from the hook receiving portion 6 of the handle receiver h2, and the hook 2 is retracted into the unlocked position below the upper edge of the door 9B, roughly parallel to the upper edge of the door 9B. At the same time, within the handle base 1 (see Figure 3), the base-side rotating shaft portion 11 rotates in the same direction as the handle lever 3, and the arc-shaped surface 114C that was pressed against the pressurized surface 7P of the leaf spring 7 of the leaf spring mounting portion 113 disengages from the pressurized surface 7P of the leaf spring 7. The pressurized surface 7P of the leaf spring 7 and the other pressurized surface 114B, which is farther away from the projection 11I on the outer circumference of the base-side rotating shaft portion 11, are pressed together and engaged, so that the unlocked state of the hook 2 is securely maintained and the handle lever 3 is securely maintained in the unlocked position. Therefore, the hook 2 and the handle lever 3 do not wobble or rattle. From this state, the door 9B is pulled down. The door 9B can be opened smoothly.

[0047] To close the door 9B, grip the handle lever 3 and push the door 9B upward toward the front of the housing 9A, fitting it into the recess 91 on the front of the housing 9A. In this state (see Figure 10(2)), rotate the handle lever 3 from the unlocked position toward the locked position. This causes the hook 2 to rotate from the upper edge of the door 9B toward the locked position above the upper edge of the door 9B, i.e., toward the hook receiving portion 6. The hook 2 is then smoothly engaged by the guide surface a11G (see Figure 9(b)) of the locking surface covering portion a1 of the attachment A (see Figure 8) attached to the hook receiving portion 6, that is, guided from one hook guide portion a111 on one side toward the central hook engaging portion 110. Simultaneously, within the handle base 1, (see Figure 3) the base-side rotating shaft portion 11 rotates in the same direction as the handle lever 3 and contacts the pressurized surface 7P of the leaf spring 7 of the leaf spring mounting portion 113. The other pressurized surface 114B, which is farther from the projection 11I on the outer circumference of the base-side rotating shaft portion 11 that is being pressed, disengages from the pressurized surface 7P of the leaf spring 7. The pressurized surface 7P of the leaf spring 7 and the arc-shaped surface 114C on the outer circumference of the base-side rotating shaft portion 11 engage, and the pressurized surface portion 71 of the leaf spring 7 is pushed up by the arc-shaped surface 114C.

[0048] Then, when the handle lever 3 is rotated to a nearly horizontal locked position (see Figure 3), the rotation of the handle lever 3 in the same direction is restricted by the abutment engagement between the projection 11I of the base-side rotating shaft portion 11 and one of the stoppers 111. At the same time, there is a click sensation due to the engagement between the hook 2 and the hook engagement portion a110 in the center of the attachment A of the hook receiving portion 6, and the hook 2 protrudes to the upper locked position above the upper edge of the door 9B and is completely locked to the hook receiving portion 6 of the handle receiver h2 via the attachment A. At the same time, within the handle base 1 (see Figure 3), the base-side rotating shaft portion 11 rotates in the same direction as the handle lever 3, and the arc-shaped surface 114C that is pressed against the pressurized surface 7P of the leaf spring 7 of the leaf spring mounting portion 113 disengages from the pressurized surface 7P of the leaf spring 7. The pressurized surface 7P of the leaf spring 7 and one of the pressurized surfaces 114A that is close to the projection 11I on the outer circumference of the base-side rotating shaft portion 11 are pressed together and engaged, so that the locked state of the hook 2 is securely maintained and the handle lever 3 is securely maintained in the locked position. Therefore, the hook 2 and the handle lever 3 do not wobble or rattle. By locking the hook 2 to the hook receiving portion 6 in this way, the door 9B is further pushed into the recess 91, and this pressure from the door 9B compresses the packing 92 around the entire periphery of the opening 90 of the housing 9A, so that (due to the reaction force of the packing 92) the opening 90 of the housing 9A is completely sealed and this sealed state is maintained. In this device H, the locked state of the hook 2 and the locked position of the handle lever 3 are maintained by the leaf spring 7. Therefore, even if the restorative properties of the reaction force decrease due to the deterioration of the packing 92 over time, the strong engagement between the hook 2 and the hook receiving part 6, that is, the interlocking (pressing) due to great pressure, is maintained. This prevents the handle lever 3 from drooping due to its own weight in the locked position, or from the handle lever 3 sagging and the hook 2 from disengaging from the hook receiving part 6, causing the door 9B to open.

[0049] Furthermore, each time the door 9B is opened and closed, the hook 2 and the hook receiving part 6 are repeatedly engaged and disengaged by operating the handle lever 3. However, in this device H, an attachment A made of synthetic resin is laminated and mounted on the hook receiving part 6. Therefore, unlike conventional devices where metal materials rub against each other, no metal powder is generated between the hook 2 and the hook receiving part 6.

[0050] As described above, according to the device H, a leaf spring 7 is provided within the handle base 1 around the rotation of the base-side rotating shaft 11 so as to be able to press against the circumferential surface of the base-side rotating shaft 11 in a state where the hook 2 of the sealing handle h1 and the hook receiving portion 6 of the handle receiver h2 are engaged. This leaf spring 7 maintains the engaged state between the hook 2 and the hook receiving portion 6, thereby reliably holding the locked position of the handle lever 3 and reliably engaging the hook 2 and the hook receiving portion 6, thereby reliably sealing the housing with the door. In this case, the leaf spring 7 has a flat pressing surface 7P that can be pressed against the circumferential surface of the base-side rotating shaft portion 11, and the circumferential surface of the base-side rotating shaft portion 11 has a flat pressure-receiving surface 114A that receives the pressing surface 7P of the leaf spring 7. The pressing surface 7P of the leaf spring 7 and the pressure-receiving surface 114A of the base-side rotating shaft portion 11 are formed such that one of them contacts the other at an angle in the engagement direction between the sealing handle h1 and the handle receiver h2. This increases the pressure applied to the circumferential surface of the base-side rotating shaft portion 11, making it possible to more reliably maintain the locked position of the handle lever 3 and the engagement between the hook 2 and the hook receiver 6, thereby allowing the housing to be more reliably sealed by the door.

[0051] Furthermore, in this device H, a leaf spring 7 is provided within the handle base 1 around the rotation of the base-side rotating shaft portion 11, and is capable of being pressed against the circumferential surface of the base-side rotating shaft portion 11 when the hook 2 of the sealing handle h1 and the hook receiving portion 6 of the handle receiver h2 are not engaged. Similarly, the leaf spring 7 has a flat pressing surface 7P that can be pressed against the circumferential surface of the base-side rotating shaft portion 11, and the circumferential surface of the base-side rotating shaft portion 11 has a flat pressure-receiving surface 114B that receives the pressing surface 7P of the leaf spring 7. The pressing surface 7P of the leaf spring 7 and the pressure-receiving surface 114B of the base-side rotating shaft portion 11 are formed so that one of them can contact the other at an oblique angle in the direction of non-engagement between the sealing handle h1 and the handle receiver h2. This increases the pressure applied to the circumferential surface of the base-side rotating shaft portion 11, making it possible to more reliably hold the handle lever 3 in the unlocked position and the hook 2 and hook receiving portion 6 disengaged. As a result, the hook 2 does not interfere with the opening and closing of the door, and the door can be opened and closed reliably.

[0052] Device H also has the following advantages: (1) Since an attachment A made of synthetic resin is laminated onto the surface of the hook receiving portion 6 of the handle receiver h2 that the hook 2 contacts, the generation of metal powder due to friction between the hook 2 and the hook receiving portion 6 can be prevented. In this case, a guide surface a11G is formed on the surface of attachment A that contacts the hook 2, which is capable of guiding the hook 2 to its proper engagement position. This allows the hook 2 and the hook receiving portion 6 to engage and disengage smoothly and reliably. (2) The base-side rotating shaft portion 11 of the handle base 1, the handle lever-side rotating shaft portion 31 of the handle lever 3, and the hook-side rotating shaft portion 21 of the hook 2 each have shaft insertion holes 110, 20, and 30, respectively, and the base-side rotating shaft portion 11, the handle lever-side rotating shaft portion 31, and the hook-side rotating shaft portion 21 are operationally connected by a connecting shaft B inserted between the respective shaft insertion holes 110, 20, and 30. The shaft insertion hole 20 of the hook-side rotating shaft portion 21 is formed as an elongated hole 20 that is long toward the engagement end direction of the handle receiver h2 of the hook 2, and the hook-side rotating shaft portion 21 has a plurality of recesses 2010 along the periphery of the elongated hole 20 on the respective connecting surfaces 201 and 202 between the hook-side rotating shaft portion 21 and the base-side rotating shaft portion 11 and the handle lever rotating shaft portion 31. In contrast, the base-side rotating shaft portion 11 and the handle lever rotating shaft portion 31 have multiple protrusions 1011 and 3011 on their connecting surfaces 101 and 301 with the hook-side rotating shaft portion 21, respectively, which can selectively engage with multiple recesses 2010 on the connecting surfaces 201 and 202 of the hook-side rotating shaft portion 11. By adjusting the insertion position of the connecting shaft B in the elongated hole 20 that forms the shaft insertion hole 20 of the hook 2, the length between the connecting shaft 3 and the locking end of the hook 2 can be adjusted. In accordance with the insertion position of the connecting shaft B in the elongated hole 20, the connecting surfaces 201 and 202 of the hook-side rotating shaft portion 21 and the connecting surfaces 101 and 301 of the base-side rotating shaft portion 11 and the handle lever-side rotating shaft portion 31 can be fixed by the engagement of their respective recesses 2010 and protrusions 1011 and 3011 with each other, thereby adjusting the engagement position between the hook 2 and the hook receiving portion 6. This allows the length of the hook 2 to be adjusted, and the hook 2 and the hook receiving portion 6 to be engaged at the optimal engagement position.

[0053] In this embodiment, the pressing surface 7P of the leaf spring 7 and one of the pressured surfaces 114A of the base-side rotating shaft portion 11 are formed so that one of them contacts the other at an angle in the direction of engagement between the sealing handle h1 and the handle receiver h2. However, the pressing surface of the leaf spring and the pressured surface of the base-side rotating shaft portion may be formed so that they contact each other parallel to each other. Even in this case, the pressing force on the circumferential surface of the base-side rotating shaft portion is slightly lower than in the above embodiment, but it is possible to achieve generally the same effects as in the above embodiment. Similarly, the pressing surface 7P of the leaf spring 7 and the other pressed surface 114B of the base-side rotating shaft portion 11 are formed such that one of them can contact the other at an oblique angle in the non-engaging direction between the sealing handle h1 and the handle receiver h2. However, the pressing surface of the leaf spring and the other pressed surface of the base-side rotating shaft portion may be formed to contact each other parallel to each other. Even in this case, the pressure applied to the circumferential surface of the base-side rotating shaft portion is slightly lower than in the above embodiment, but it is possible to achieve generally the same effects as in the above embodiment.

[0054] Furthermore, in this embodiment, the hook-side rotating shaft portion 21 has multiple recesses 2010 along the periphery of the elongated hole 20 on the respective connecting surfaces 201 and 202 between the base-side rotating shaft portion 11 and the handle lever rotating shaft portion 31, and the connecting surfaces 101 and 301 of the base-side rotating shaft portion 11 and the handle lever rotating shaft portion 31 have multiple protrusions 1011 and 3011, respectively, that can selectively engage with the multiple recesses 2010 on the respective connecting surfaces 201 and 202 of the hook-side rotating shaft portion 21. However, conversely, the hook-side rotating shaft portion may have multiple protrusions along the periphery of the elongated hole on each connecting surface 201 and 202 between the base-side rotating shaft portion and the handle lever rotating shaft portion, and the connecting surfaces of the base-side rotating shaft portion and the handle lever rotating shaft portion may each have multiple recesses that can selectively engage with the multiple protrusions on each connecting surface of the hook-side rotating shaft portion. Even in this way, the same effects and advantages as in the above embodiment can be achieved. [Explanation of Symbols]

[0055] H Sealed handle device (this device) h1 Sealing handle 1. Handle base 1F front section 10G step surface S0 Screw insertion hole 1S peripheral part 10 Rotating shaft insertion holes 101 Connecting surface 1011 Convex part 11. Base-side rotating shaft 110 Shaft insertion hole 11G step surface 11I protrusion 111 One-sided stopper 112 The other stopper 113 Leaf spring mounting section 114 Pressurized surface 114A Pressurized surface 114B Pressurized surface 114C Arc-shaped surface 2 hooks 20 Shaft insertion hole (long hole) 200A groove 200B Groove 201 Connecting surface 202 Connecting surface 2010 Recess 21 Hook-side rotating shaft 22 claws 3. Handle lever 30. Through-hole (screw hole) 301 Connecting surface 3011 Convex part 31. Rotation shaft on the handle lever side 32 Grip 4 rotation axes B. Connecting shaft (bolt) h2 Handle receiver 5. Mounting base 5F front section 5S peripheral part S0 Screw insertion hole 6. Hook receiving section 61 Support part 610 threaded holes 62 Locking part A Attachment a1 Locking surface covering part a11 Flat part a11G Guide surface a110 Hook engagement part a111 Hook guide section a12 3 side part a2 Inner surface covering of support part a20 Screw insertion hole S screw a21 flat plate part a22 2 side part 7. Leaf spring 7P Pressure surface 71 Pressure surface 72 Support part 9A enclosure 90 aperture 91 Recess 92 Packing 9B Door 93 Hinge

Claims

1. A sealing handle device comprising a handle base, a hook rotatably connected to the handle base via a pivot shaft, and a handle lever for rotating the hook, and a handle receiver having a hook receiving portion that can engage with the hook of the sealing handle, wherein the pivot shaft is rotatably disposed within the handle base and its tip protrudes from the front surface of the handle base, a handle lever side pivot shaft portion protrudes coaxially from the handle lever relative to the base side pivot shaft portion, and a hook side pivot shaft portion provided on the hook and operably connected between the base side pivot shaft portion and the handle lever side pivot shaft portion, wherein one of the sealing handle or the handle receiver is attached to the door side and the other is attached to the frame side around the opening of the housing, and the engagement of the hook of the sealing handle and the hook receiving portion of the handle receiver causes the door to be brought into close contact with the frame around the opening of the housing and seals the opening of the housing, Within the handle base, a leaf spring is provided so as to be able to press against the circumferential surface of the base-side rotating shaft portion around the rotation of the base-side rotating shaft portion, at least in a state where the hook of the sealing handle and the hook receiving portion of the handle receiver are engaged. The leaf spring has a flat pressing surface that can be pressed against the circumferential surface of the base-side rotating shaft portion, and the circumferential surface of the base-side rotating shaft portion has a flat pressure-receiving surface that receives the pressing surface of the leaf spring, and the pressing surface of the leaf spring and the pressure-receiving surface of the base-side rotating shaft portion are formed such that one of the pressing surface of the leaf spring and the pressure-receiving surface of the base-side rotating shaft portion can contact the other at an oblique angle in the engagement direction between the sealing handle and the handle receiver. The leaf spring maintains the engaged state between the hook and the hook receiving portion. A sealed handle device characterized by the following features.

2. A sealing handle device according to Claim 1, wherein a leaf spring is provided within the handle base around the rotation of the base-side rotating shaft portion, and in a state where the hook of the sealing handle and the hook receiving portion of the handle receiver are not engaged, the leaf spring has a flat pressing surface that can be pressed against the circumferential surface of the base-side rotating shaft portion, and the circumferential surface of the base-side rotating shaft portion has a flat pressure-receiving surface that receives the pressing surface of the leaf spring, and the pressing surface of the leaf spring and the pressure-receiving surface of the base-side rotating shaft portion are formed so that they can contact each other in parallel, or so that one of the pressing surface of the leaf spring and the pressure-receiving surface of the base-side rotating shaft portion can contact the other at an angle in the direction of non-engagement between the sealing handle and the handle receiver.

3. The sealed handle device according to claim 1, wherein an attachment made of synthetic resin is laminated and mounted on the surface of the hook receiving portion of the handle receiver that contacts the hook.

4. The sealed handle device according to claim 1, wherein an attachment made of synthetic resin is laminated and mounted on the surface of the hook receiving portion of the handle receiver that contacts the hook, and a guide surface capable of engaging and guiding the hook to the regular engagement position of the hook is formed on the surface of the attachment that contacts the hook.

5. The base-side rotating shaft portion of the handle base, the handle lever-side rotating shaft portion of the handle lever, and the hook-side rotating shaft portion of the hook each have shaft insertion holes in their axes, the base-side rotating shaft portion, the handle lever-side rotating shaft portion, and the hook-side rotating shaft portion are operably connected by a connecting shaft inserted between the respective shaft insertion holes, the shaft insertion hole of the hook-side rotating shaft portion is formed as an elongated hole toward the engagement end direction of the hook receiving portion of the handle receiving portion of the handle receiving portion of the hook, and the hook-side rotating shaft portion has a plurality of recesses or protrusions along the periphery of the elongated hole on each connecting surface of the hook-side rotating shaft portion with the base-side rotating shaft portion and the handle lever-side rotating shaft portion, and the base-side rotating shaft portion and the handle lever-side rotating shaft portion The sealing handle device according to claim 1, wherein each connecting surface of the hook-side rotating shaft portion has a plurality of protrusions or recesses that can selectively engage with the plurality of recesses or protrusions on each connecting surface of the hook-side rotating shaft portion, and the length between the connecting shaft and the engaging end of the hook can be adjusted by adjusting the insertion position of the connecting shaft in the elongated hole that forms the shaft insertion hole of the hook, and each connecting surface of the hook-side rotating shaft portion, the base-side rotating shaft portion and the handle lever-side rotating shaft portion can be fixed by mutual engagement of the respective recesses and protrusions in accordance with the insertion position of the connecting shaft in the elongated hole, thereby enabling adjustment of the engagement position between the hook and the hook receiving portion.

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