Sealed handle device

Abstract

To prevent a handle lever from becoming hot by interrupting heat conduction even in a case of equipment whose in-casing temperature becomes high.SOLUTION: This device H includes a sealing handle h1 and a handle receiver h2, one of the sealing handle h1 and the handle receiver h2 being provided on a door side, the other being provided on a frame side around an opening of a casing, and is formed such that door is brought into pressure contact with the frame around the opening of the casing by engagement of a hook 2 of the sealing handle h1 and a hook receiving part 6 of the handle receiver h2, the sealing handle h1 having a handle lever 3 connected to one end of a rotary shaft 4 through a detachable connecting part 4j.SELECTED DRAWING: Figure 10

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, in kitchen equipment such as steam ovens and refrigerators, and medical equipment, etc., the airtightness of the door is required. Therefore, 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. 13 and 14, it is configured to include a sealing handle h81 and a handle receiver h82. As shown in FIG. 13, 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 respect to 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. 14, the handle receiver h82 has a mounting base 821 and a hook receiving 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, and by engaging the hook 812 of the sealing handle h81 with the hook receiving 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 15 shows an example of the use of this sealing handle device in equipment where a tight seal of the door is required. 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, among various types of equipment where airtightness of the door is required, in the case of appliances such as steam ovens, where the inside of the casing becomes extremely hot, the door is affected by the high temperature, and due to heat conduction, the sealing handle can become hot, meaning the handle lever can get hot. Therefore, it is necessary to ensure sufficient safety when opening and closing the door.

[0009] Furthermore, in this type of equipment, as long as the packing around the entire perimeter of the opening of the housing is new, the reaction force of the packing 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 with great pressure), maintaining the locked state of the door and keeping the handle lever horizontal. However, as the recovery ability of the reaction force decreases due to the deterioration of the packing over time, the strong engagement between the hook of the door handle and the hook receiving part of the handle receiver, i.e., the interlocking with great pressure, also decreases, and the handle lever in the locked position may no longer be able to withstand its own weight, causing the handle lever to droop and the hook to detach from the hook receiving part, potentially 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.

[0010] Furthermore, since door handles and handle receivers are manufactured from metal materials such as stainless steel, 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, which is undesirable.

[0011] The present invention solves these conventional problems and aims to prevent the handle lever from becoming hot even in equipment where the inside of the housing becomes hot by blocking heat conduction, and to reliably maintain the locked position of the handle lever and securely engage the hook and hook receiver even if the packing on the housing side deteriorates over time and the resilience of the reaction force decreases, 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]

[0012] To achieve the above objective, the present invention A sealing handle device comprising a sealing handle consisting of 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 one of the sealing handle or the handle receiver is provided on the door side and the other is provided on the frame side around the opening of the housing, and the door is pressed against the frame around the opening of the housing by the engagement of the hook of the sealing handle and the hook receiving portion of the handle receiver, The sealing handle is configured such that the handle lever is connected to one end of the rotating shaft via a detachable connector. The aforementioned detachable connecting part is The head, which has one end of the rotating shaft formed in a substantially cylindrical shape and has a locking recess on its outer surface, A connecting shaft is integrally formed with the handle lever and protrudes from the handle, A lock release ring comprising a lock ring mounting portion formed in a substantially cylindrical shape with one end open and having a circumferential recess on the inner peripheral edge of the opening at one end, and a connecting shaft insertion portion formed in a substantially cylindrical shape with the other end open and communicating with the lock ring mounting portion by a connecting shaft insertion portion, and having a finger grip portion on its outer peripheral surface, A locking member is provided on the locking ring, which is formed in a substantially cylindrical shape so as to be fitted onto the head and so as to be fitted onto the locking ring mounting portion of the release ring, and is provided on the circumferential surface so as to be retractable from the outer circumferential surface of the circumferential surface and normally so as to protrude from the outer circumferential surface of the circumferential surface, and is provided in relation to the release ring, such that a locking actuation portion is retracted into the outer circumferential surface of the circumferential surface by pressure from the inner circumferential surface of the locking ring mounting portion and is guided to protrude from the outer circumferential surface of the circumferential surface by the recess of the locking ring mounting portion, and a locking claw is provided so as to be retractable from the inner circumferential surface of the circumferential surface, and in conjunction with the retraction of the locking actuation portion into the outer circumferential surface of the circumferential surface, it protrudes from the inner circumferential surface of the circumferential surface and engages with the locking recess of the head, and in conjunction with the protrusion of the locking actuation portion from the outer circumferential surface of the circumferential surface, Equipped with, The lock ring is mounted within the lock ring mounting portion of the unlock ring, the connecting shaft of the handle lever is inserted through the connecting shaft insertion portion of the lock ring via a spring mechanism, biased in the direction opposite to the lock ring mounting portion, and the tip of the connecting shaft and the lock ring are connected. By fitting the lock ring within the release ring onto the head of the rotating shaft, the locking recess of the head and the locking claw of the lock ring are engaged, thereby connecting the rotating shaft and the handle lever. By pulling the release ring toward the handle lever against the biasing force of the spring, the engagement between the locking recess of the head and the locking claw of the lock ring is released, thereby separating the rotating shaft and the handle lever. This is the gist of it.

[0013] This sealed handle device also includes the following configuration: (1) The locking member has a locking actuation part which is a plate with a curved cross-section and a convex portion at one end of one face, and a locking claw which is a plate that extends from the other end of one face of the plate toward the front of that face in a substantially V-shape in cross-section, and the circumferential surface of the locking ring has a locking member mounting portion which is formed on the outer circumferential surface side of the circumferential surface so that the locking actuation part can be retracted with one end facing toward the connecting shaft insertion part and the other end facing toward the opposite direction and has an engaging portion of the convex portion at one end, and a locking claw mounting portion which is formed on the inner circumferential surface side of the circumferential surface so that the locking claw can be retracted and communicates with the locking actuation part mounting portion, and the locking member is attached to the locking member mounting portion which is formed so that the locking actuation part can be retracted, with the convex portion at one end acting as a fulcrum and the other end protruding from the locking actuation part mounting portion. (2) The handle lever is formed in a substantially T shape and consists of a grip that extends substantially in a straight line and a connecting shaft that extends perpendicularly from the center of the grip in the longitudinal direction. (3) The rotating shaft consists of a base-side rotating shaft portion rotatably arranged within the handle base and having its tip protruding from the front surface of the handle base, a hook-side rotating shaft portion that is concentrically connected to the base-side rotating shaft portion and has a hook, and a handle lever-side rotating shaft portion that is operably connected to the hook-side rotating shaft portion and forms a head that is fitted onto a detachable connecting portion. (4) 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, in a state in which the hook of the handle lever and the hook receiving portion of the handle receiver are engaged. In this case, it is preferable that the leaf spring has a flat pressing surface that can be pressed against the circumferential surface of the rotating shaft portion on the base side, and the circumferential surface of the rotating shaft portion on the base side has a flat pressure-receiving surface that receives the pressing surface of the leaf spring, and that the pressing surface of the leaf spring and the pressure-receiving surface of the rotating shaft portion on the base side 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 rotating shaft portion on the base side can contact the other at an angle in the direction of engagement between the sealing handle and the handle receiver. (5) Within the handle base, a leaf spring is provided around the rotation of the base-side rotating shaft portion so as to be able to be pressed against the circumferential surface of the base-side rotating shaft portion in a state in which the hook of the handle lever and the hook receiving portion of the handle receiver are not engaged, the leaf spring has a flat pressing surface so as to be able to 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 as to be able to contact each other in parallel, 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 in which the sealing handle and the handle receiver are not engaged. (6) 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. (7) 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 the hook contacts that the hook can guide the hook to the proper engagement position. (8) The base-side rotating shaft, the handle lever-side rotating shaft, and the hook-side rotating shaft each have an axial hole in their respective axes, and the base-side rotating shaft, the handle lever-side rotating shaft, and the hook-side rotating shaft are operably connected by a fixed shaft fixed between each of the axial holes, the axial hole of the hook-side rotating shaft is formed as an elongated hole toward the engagement end of the hook with the handle receiver, and the hook-side rotating shaft has a plurality of recesses or protrusions along the periphery of the elongated hole on each connecting surface of the hook-side rotating shaft with the base-side rotating shaft and the handle lever-side rotating shaft, and the hook-side of the base-side rotating shaft and the handle lever-side rotating shaft Each connecting surface with the 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 by adjusting the insertion position of the connecting shaft in the elongated hole that forms the shaft hole of the hook-side rotating shaft portion, the length between the connecting shaft and the locking end of the hook-side rotating shaft portion can be adjusted, and each connecting surface of the hook-side rotating shaft portion and each connecting surface of the base-side rotating shaft portion and the handle lever-side rotating shaft portion can be fixed by the engagement of their respective recesses and protrusions with each other, thereby enabling adjustment of the engagement position between the hook and the hook receiving portion. [Effects of the Invention]

[0014] According to the sealed handle device of the present invention, the handle lever is connected to one end of the rotating shaft via a detachable connecting part, and the handle lever can be arbitrarily attached to and detached from the rotating shaft. Therefore, by connecting the handle lever to the rotating shaft when opening and closing the door, and detaching the handle lever from the rotating shaft when not opening or closing the door, even in equipment where the inside of the housing becomes hot, heat conduction to the handle lever is blocked, the handle lever does not become hot, and the door can be safely opened and closed with the handle lever. In particular, as described above, this detachable connecting part comprises the head of the rotating shaft, the connecting shaft of the handle, a release ring having a lock ring mounting part and a connecting shaft insertion part, and a lock ring, the lock ring is mounted in the lock ring mounting part of the release ring, and the connecting shaft of the handle lever is connected to the connecting shaft insertion part of the lock ring with a coil spring The connecting shaft is inserted through the ring, biased in the opposite direction to the lock ring mounting portion, and the tip of the connecting shaft is connected to the lock ring. By fitting the lock ring inside the release ring onto the head of the rotating shaft, the locking recess of the head and the locking claw of the lock ring engage, connecting the rotating shaft and the handle lever. By pulling the release ring towards the handle lever against the biasing force of the coil spring, the engagement between the locking recess of the head and the locking claw of the lock ring is released, separating the rotating shaft and the handle lever. As a result, the handle lever can be connected to the rotating shaft with a single push, and the handle lever can be removed from the rotating shaft with a single touch, thus providing the unique and exceptional effect of the present invention, which allows the handle lever to be attached to and detached from the rotating shaft with extreme ease.

[0015] Furthermore, as described above, the sealing handle device of the present invention uses a leaf spring to maintain the engagement state between at least the hook and the hook receiver. Therefore, even if the packing on the housing side deteriorates over time and its ability to recover the reaction force decreases, the lock position of the handle lever is reliably maintained, ensuring that the hook and the hook receiver are securely engaged, thus providing a remarkable and unique effect of the present invention that allows the housing to be reliably sealed with the door.

[0016] Furthermore, in the sealed handle device of the present invention, as described above, 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, the present invention has a remarkable effect of preventing the generation of metal powder due to the rubbing between the hook and the hook receiving portion.

Brief Description of the Drawings

[0017] [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 front view, (c) 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, particularly the sealed handle and the detachable connection portion ((a) is a partial sectional side view, (b) is a partial sectional side view, (c) is a rear view) [Figure 5] Figure showing the configuration of the sealed handle device, particularly the lock ring ((a) is a front view, (b) is a side view [Figure 6] Figure showing the configuration of the sealed handle device, particularly the lock member (side view) [Figure 7] Figure showing the configuration of the sealed handle device, particularly the handle receiver (perspective view) <000​​​​​​​​​​​​​​​​This diagram shows the configuration of a conventional sealed handle device ((a) is a front view, (b) is a side cross-sectional view). [Figure 14] This diagram (perspective view) shows the configuration of the handle receiver in particular of the sealed handle device. [Figure 15] This figure shows an example of the use of the sealed handle device. [Modes for carrying out the invention]

[0018] Next, embodiments for carrying out this invention will be described with reference to the diagrams.

[0019] As shown in Figure 1, the sealing handle device H (hereinafter referred to as "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 pivot shaft 4, and a handle lever 3 for rotating the hook 2. The handle receiver h2 has a hook receiving portion 6 that can engage with the hook 2 of the sealing handle h1. Device H has this configuration, with either the sealing handle h1 or the handle receiver h2 provided on the door side and the other on the frame side around the opening of the housing, and the door is pressed 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.

[0020] Furthermore, in the sealing handle h1 of this device H, the handle lever 3 is connected to one end of the rotating shaft 4 via a detachable connecting part 4J, and can be detached from the rotating shaft 4.

[0021] As shown in Figure 1, the sealing handle h1 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.

[0022] 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. 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 11F 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 opened 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 side and the rear side. The rotating shaft 4 is rotatably inserted and positioned within this rotating shaft insertion hole 10 and protrudes from the front portion 1F of the handle base 1.

[0023] 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 11T 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 11T of the rotating shaft 4 (described later), and this forms the other stopper 112 that restricts the rotation range of the handle lever 3.

[0024] As shown in Figure 2, the rotating shaft 4 is cylindrical overall, with a rotating shaft mounting portion 41 at its base end that is rotatably attached to the rotating shaft insertion hole 10 of the handle base 1, a handle lever mounting portion 43 at its tip that is connected to the handle lever 3, and a hook mounting portion 42 in the middle where the hook 2 is provided.

[0025] As shown in Figure 4, the base end of the rotating shaft 4, i.e., the rotating shaft mounting portion 41, is a cylindrical block that can be inserted into the rotating shaft insertion hole 10 of the handle base 1 and rotate within the rotating shaft insertion hole 10. In this case, the rotating shaft mounting portion 41 is formed such that the front (tip) side is a small-diameter cylindrical shape that can be fitted into the small-diameter front side of the rotating shaft insertion hole 10, and the rear (rear end) side is a large-diameter cylindrical shape that can be fitted into the large-diameter rear side of the rotating shaft insertion hole 10. Thus, the rotating shaft mounting portion 41 is provided with a stepped surface 11G between the front and rear sides, and this stepped surface 41G is formed to be able to engage with the stepped surface 10G between the front and rear sides of the rotating shaft insertion hole 10. The rotating shaft mounting portion 41 is inserted into the rotating shaft insertion hole 10 of the handle base 1, and a backing plate or the like is attached to the back of the handle base 1 to hold it within the rotating shaft insertion hole 10 of the handle base 1. Furthermore, a projection 11T is provided on the circumferential surface of the rotating shaft mounting portion 41 to restrict the rotation range of the handle lever 3 and to restrict the rotation of the rotating shaft 4. In this case, the projection 11T is formed as a rectangular convex shape with a square cross-section on the outer circumferential surface of the large diameter rear side and protrudes radially outward from the rotating shaft mounting portion 41.

[0026] As shown in Figure 2, the tip of the rotating shaft 4, i.e., the handle lever mounting portion 43, is a rectangular tubular block that serves as a head 411, which is part of the detachable connecting portion 4J described later, and has a locking recess 410 on its outer circumference. In this case, the handle lever mounting portion 43 is formed as a rectangular tubular shape with a roughly regular hexagonal cross-section that is slightly smaller than the cross-section of the middle of the rotating shaft 4 and has rounded corners. On the outer circumference, the locking recess 410 is formed with a roughly U-shaped cross-section around the entire circumference, slightly towards the tip from the axial middle, and both sides of the bottom surface of the locking recess 410 are tapered so as to gradually widen from the inner circumference to the outer circumference. In this case, the tip of the outer circumference of the handle lever mounting portion 43 is formed with a roughly arc-shaped cross-section adjacent to the locking recess 410, and serves as a locking guide 4101, which is part of the detachable connecting portion 4J described later. A flange 43F protrudes from the rear of the handle lever mounting portion 43, and the stepped surface 43G is the contact surface of the detachable connecting portion 4J described later.

[0027] As shown in Figure 2, the middle of the rotating shaft 4 is a roughly cylindrical block shape, with a hook 2 protruding from its outer surface, forming a hook mounting portion 42. In this case, the middle of the rotating shaft 4 is formed in a roughly cylindrical shape, and as previously described, it is formed in a roughly cylindrical shape that is slightly larger in cross-section than the handle lever mounting portion 43 at the tip, and is connected to the flange 43F of the handle lever mounting portion 43. The hook 2 is integrally provided on the outer surface of the middle of this rotating shaft 4, and the entire thing is claw-shaped so that it can engage with the hook receiving portion 6 of the handle receiver h2. In this case, the hook 2 is a roughly rectangular plate in front view, protruding from the outer surface at a right angle to the axis of the rotating shaft 4 in the axial middle part of the rotating shaft 4, and is positioned between the handle base 1 and the handle lever 3 (see Figure 1(c)).

[0028] As shown in Figure 1(c), the handle lever 3 is formed in a roughly T-shape and consists of a grip 31 that extends in a roughly straight line and a connecting shaft 32 that extends perpendicularly from the center of the grip 31 in the longitudinal direction. The grip 31 has a central cylindrical portion 321 and an elongated plate-like portion 311 that extends symmetrically from the outer surface in a wing-like manner along the extension of its diameter, tapering in a plan view with a gradually narrowing width and exhibiting a semicircular tip in a front or rear view. The connecting shaft 32 has the aforementioned central cylindrical portion 321, a slightly smaller diameter extension cylindrical portion 322 extending from the tip of the central cylindrical portion 321, and a rectangular tube portion 323 (see Figure 4) that extends from the tip of the extension cylindrical portion 322 in a convex shape with a square cross-section, inscribed within the circular cross-section of the extension cylindrical portion 322. A screw hole 32S is cut into the tip surface of the rectangular tube portion 323, with the axis of the rectangular tube portion 323 and the extension cylindrical portion 322 being the axis of the rectangular tube portion 323. Furthermore, the extended cylindrical portion 322 of the connecting shaft 32 is provided with a spring support (step) that allows a spring member (coil spring) to be wound around it.

[0029] In the configuration of the sealing handle h1, the detachable connecting part 4J (see Figure 1(c)) comprises a head 411, a connecting shaft 32, a lock release ring 421, a lock ring 431, and a spring member 441.

[0030] As shown in Figure 2, the head 411 is formed in a substantially cylindrical shape at one end of the rotating shaft 4 and has a locking recess 410 on its outer circumferential surface. As previously described, in this case, the head 411 is provided on the handle lever mounting portion 43 at the tip of the rotating shaft 4. The head 411 is formed in a substantially regular hexagonal cross-section with rounded corners, slightly smaller than the cross-section of the middle of the rotating shaft 4, and the locking recess 410 is formed on the outer circumferential surface around the entire circumference, slightly towards the tip from the axial middle, with a substantially U-shaped cross-section, and both sides of the bottom surface of the locking recess 410 are tapered so as to gradually widen from the inner circumference to the outer circumference. Furthermore, adjacent to the locking recess 410, the tip of the outer circumferential surface of the head 411 is formed to protrude in a substantially arc-shaped cross-section, forming a locking guide 4101.

[0031] As shown in Figure 4, the connecting shaft 32 is integrally formed with the handle lever 3. In this case, the handle lever 3 is formed in a roughly T-shape as described above and consists of a grip 31 that extends in a roughly straight line and a connecting shaft 32 that extends perpendicularly from the center of the grip 31 in the longitudinal direction. The connecting shaft 32 has a central cylindrical portion 321, a slightly smaller diameter extended cylindrical portion 322 that extends from the tip of the central cylindrical portion 321, and a rectangular tube portion 323 that extends from the tip of the extended cylindrical portion 322 in a convex shape with a square cross-section, inscribed within the circular cross-section of the cylindrical portion. A screw hole 32S is cut into the tip surface with an opening at the axis of the rectangular tube portion 323.

[0032] As shown in Figure 4, the unlocking ring 421 is formed in a substantially cylindrical shape with one end open, and has a locking ring mounting portion 423 having a recess 422 in the circumferential direction on the inner peripheral edge of the opening at one end, and a connecting shaft insertion portion 426 formed in a substantially cylindrical shape with the other end open, communicating with the locking ring mounting portion 423 by a connecting shaft insertion portion 424, and having a finger grip portion 425 on its outer peripheral surface. In this case, the locking ring mounting portion 423 is formed in a cylindrical shape with a diameter slightly larger than the outer diameter of the locking ring 431 and a height approximately the same as or slightly higher than the height of the locking ring 431, so that the locking ring 431 described later can be fitted into it, and multiple small recesses 422 are formed in a horizontally elongated rectangular shape when viewed from the rear at equal intervals in the circumferential direction on the inner peripheral edge of the opening, in this case at 6 locations. The connecting shaft insertion portion 426 has a larger diameter at the other end, which is slightly larger than the outer diameter of the lock ring mounting portion 423. The space between this larger diameter portion and the lock ring mounting portion 423 is formed into a cylindrical shape with a circular cross-section that is narrowed into a curved concave shape in cross-section, and a cylindrical space with an inner diameter slightly larger than the connecting shaft 32 is formed in the center of this space, allowing the connecting shaft 32 to be inserted. This cylindrical space is connected to the lock ring mounting portion 423 by a connecting shaft insertion portion 424 formed between the connecting shaft insertion portion 426 and the lock ring mounting portion 423.

[0033] As shown in Figure 4, the lock ring 431 is formed in a substantially cylindrical shape so that it can be fitted onto the head 411 and the lock ring mounting portion 423 of the unlock ring 421 can be fitted onto it (outside), and a locking member 434 is disposed on its circumferential surface.

[0034] As shown in Figure 5, the lock ring 431 is formed in a substantially cylindrical shape. In this case, the outer and inner surfaces of the body are chamfered at six equally spaced locations, corresponding to the six recesses 422 on the inner surface of the lock ring mounting portion 423 of the unlocking ring 421, to form six flat surfaces, resulting in a substantially cylindrical shape with a substantially hexagonal cross-section overall. One end of the body has a connecting shaft connecting portion 432, and the other end has an opening 433 into which the head 411 can be inserted. In this case, a substantially square cross-section groove 4321 is formed in the center of one end of the body so as to be able to fit the square tube portion 323 at the tip of the connecting shaft 32, and a screw insertion hole 4320 is formed through the center of the groove so as to be able to communicate with the screw hole 32S of the connecting shaft 32. This screw insertion hole 4320 is gradually widened behind the groove 4321 to form a tapered shape and becomes a receiving portion 4322 for the screw head. In this way, inside the main body, the area from the periphery of the screw head receiving portion 4322 to the opening 433 at the other end becomes a cylindrical space with a roughly hexagonal cross-section that is fitted onto the head 411, and the opening 433 at the other end is roughly circular with a roughly hexagonal cross-section.

[0035] As shown in Figure 4, the locking member 434 is provided on the outer circumferential surface of the locking ring 431 so as to be retractable and normally able to protrude from the outer circumferential surface of the locking ring 431, and has a locking actuation part 4341 that is retracted into the outer circumferential surface of the locking ring 431 by pressure from the inner circumferential surface of the locking link mounting part 423 and guided to protrude from the outer circumferential surface of the locking ring 421 by a recess 422 of the locking link mounting part 423, and a locking claw 4342 that is provided on the inner circumferential surface of the locking ring 431 so as to be retractable, and in conjunction with the retraction of the locking actuation part 4341 into the outer circumferential surface of the locking ring 431, it protrudes from the inner circumferential surface of the locking ring 431 and engages with the locking recess 410 of the head 411, and in conjunction with the protrusion of the locking actuation part 4341 from the outer circumferential surface of the locking ring 431, it retracts into the inner circumferential surface of the locking ring 431 and disengages from the locking recess 410 of the head 411. In this case, a plurality of locking members 434 are provided on the outer circumferential surface of the locking ring 431.

[0036] In this case, as shown in Figure 6, the locking member 434 consists of a plate with a curved cross-section, the locking actuation part 4341 having a convex portion at one end of one face, and a locking claw 4342 which is a plate that extends from the other end of one face of the plate forming the locking actuation part 4341 toward the front of that face in a roughly V-shape in cross-section, so that the locking member 434 as a whole is formed in a roughly J-shape in cross-section. In this case, the tip of the roughly V-shaped cross-section extends toward one face of the locking actuation part 4341, and the tip is formed as a projection toward one face of the locking actuation part 4341. Six locking members 434 are used here. As shown in Figure 5, a locking member mounting portion 4310 is provided on the circumferential surface of the locking ring 431. The lock member mounting portion 4310 has a lock operating portion housing recess 431a formed on the outer circumferential surface side of the circumferential surface portion so as to be retractable for the lock operating portion 4341 of the lock member 434, with one end facing toward the connecting shaft insertion portion 426 and the other end facing toward the opposite direction, and having an engaging portion (groove) at one end for the convex portion of one end of the lock member 434, and a lock claw housing recess 431b formed on the inner circumferential surface side of the circumferential surface portion so as to be retractable for the lock claw 4342, communicating with the lock operating portion housing recess 431a. Here, the lock member mounting portion 4310 is provided at six equally spaced locations in the circumferential direction in the axial middle part of the circumferential surface portion. Thus, each of the six lock members 434 is attached to the lock member mounting portion 4310 with the lock operating portion 4341 engaging with the engaging portion of the lock operating portion housing recess 431a with the convex portion of one end as a fulcrum, and the other end protruding from the lock operating portion housing recess 431a.

[0037] As shown in Figure 4, the spring member 441 is used in the assembly of the detachable connecting part 4J to press and bias the connecting shaft 32 of the handle lever 3, which is fitted into the connecting shaft fitting part 426 of the lock ring release ring 421, in the direction of pulling it out from the opening of the connecting shaft fitting part 426. In this case, a coil spring (hereinafter referred to as coil spring 441) is used. This coil spring 441 is wound around the extended cylindrical part 322 of the connecting shaft 32 and is placed together with the connecting shaft 32 in the connecting shaft fitting part 426, so as to press and bias the connecting shaft 32 of the handle lever 3 in the direction of pulling it out from the opening of the connecting shaft fitting part 426.

[0038] The detachable connecting part 4J has the above configuration, as shown in Figure 4, the lock ring 431 is mounted in the lock ring mounting part 423 of the unlock ring 421, and the connecting shaft 32 of the handle lever 3 is inserted through the connecting shaft fitting part 426 of the lock ring 431 via a coil spring 441, biasing the connecting shaft 32 in the opposite direction to the lock ring mounting part 423, and the connecting shaft 32 and the lock ring 431 are assembled by connecting them with a screw S1.

[0039] In this case, the lock ring 431 is fitted into the lock ring mounting portion 423 with its respective hexagonal faces aligned. Upon installation of the lock ring 431, the locking actuation portions 4341 of each locking member 434 that protrude from the outer circumferential surface of the lock ring 431 are pressed against the inner circumferential surface of the lock ring mounting portion 423, causing them to retract into the outer circumferential surface of the lock ring 431. Simultaneously, the pressing of the locking actuation portions 4341 causes the locking claws 4342 of each locking member 434 to protrude from the inner circumferential surface of the lock ring 431.

[0040] Meanwhile, the connecting shaft 32 of the handle lever 3 is fitted into the connecting shaft fitting portion 426 of the lock ring 431 via a coil spring 441, and the rectangular tube portion 323 at the tip of the connecting shaft 32 is fitted into the substantially square cross-section groove 4321 at one end of the lock ring 431. This prevents the connecting shaft 32 from rotating within the connecting shaft fitting portion 426. In this state, a screw S1 is inserted from the lock ring mounting portion 423 side through the lock ring 431 into the screw insertion hole 4320 at one end of the lock ring 431 and fastened into the screw hole 32S of the connecting shaft 32. As the screw S1 is tightened, the screw head is fitted into the receiving portion 4322 at one end of the lock ring 431, completing the tightening of the screw S1, and the lock ring 431 and the connecting shaft 32 are connected and fixed within the lock release ring 421.

[0041] However, as shown in Figure 11, the lock ring release ring 421 is slidably positioned toward the handle lever 3 on the outer circumferential surface of the lock ring 431 and the connecting shaft 32. When the handle lever 3 is held in the hand, the lock release ring 421 can be pulled using, for example, the index and middle fingers. This pulling operation of the lock release ring 421 releases the locks of each locking member 434 of the lock ring 431. In other words, by sliding the lock ring release ring 421 toward the handle lever 3, each locking member 434 of the lock ring 431 faces the recesses 422 on the inner circumferential surface of the lock ring mounting portion 423 of the lock release ring 421, and the locking actuation portion 4341 can tilt toward the recesses 422 and protrude, that is, escape into the recesses 422. In conjunction with this, the locking claws 4342 can retract into the inner circumferential surface of the lock ring 431 and cease to function as a locking mechanism.

[0042] In this way, as shown in Figure 12, by fitting the lock ring 431 inside the release ring 421 onto the head 411 of the rotating shaft 4, the locking recess 410 of the head 411 and the locking claw 4342 of the lock ring 431 are engaged, connecting the rotating shaft 4 and the handle lever 3. As shown in Figure 11, by pulling the release ring 421 towards the handle lever 3 against the biasing force of the coil spring 441, the engagement between the locking recess 410 of the head 411 and the locking claw 4342 of the lock ring 431 is released, separating the rotating shaft 4 and the handle lever 3.

[0043] The handle receiver h2 for the sealing handle h1 is optional and may be either an L-shaped hook receiver that is attached to the housing or door as an add-on type as in the past, or a built-in type that is integrally formed with a part of the housing or door. However, in this device H, the add-on type handle receiver h2 is provided as a set with the sealing handle h1 described above.

[0044] As shown in Figures 1 and 2, the handle receiver h2 has a hook receiving portion 6 that can engage with the hook 2 of the sealing handle h1. Furthermore, an attachment A made of synthetic resin is laminated onto the surface of the hook receiving portion 6 that contacts the hook 2, so that the engagement between the hook receiving portion 6 and the hook 2 does not involve metal-to-metal contact. In addition, the attachment A has a guide surface a11G formed on the surface that contacts the hook 2, which guides the hook 2 to its proper engagement position, allowing for smooth engagement and disengagement between the hook receiving portion 6 and the hook 2.

[0045] As shown in Figures 1 and 2, the handle receiver h2 of this device H has a mounting base 5 and a hook receiver 6.

[0046] 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.

[0047] 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.

[0048] An attachment A made of synthetic resin is laminated and mounted on the handle receiver h2 to the surface of the hook receiver 6 that the hook 2 contacts. As shown in Figure 7, this attachment A has a locking surface covering portion a1 that can be attached to the locking surface of the hook 2 of the locking portion 62 of the hook receiver 6, and a support portion inner surface covering portion a2 that is continuous with the locking surface covering portion a1 and can be attached to the inner surface of the support portion 61, and these locking surface covering portion a1 and support portion inner surface covering portion a2 are formed integrally. As shown in Figure 8, the locking surface covering portion a1 consists of a flat plate portion a11 that covers the locking surface of the hook 2 of 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 all 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 all two sides of the support portion 61, and by having the screw S2 (see Figure 2) 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.

[0049] The device H has the above configuration, in which either 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, and the door is pressed 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.

[0050] Figures 10, 11, and 12 show examples 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.

[0051] 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.

[0052] Furthermore, if this equipment is a device such as a steam oven, where the inside of the casing becomes extremely hot, the door may be affected by the high temperature, and the sealing handle h1 may become hot due to heat conduction, meaning the handle lever 3 may become hot. Therefore, in order to safely open and close the door 9B, if the door 9B is to be kept closed, the handle lever 3 should be detached from the rotating shaft 4 of the handle base 1. In this case, as shown in Figure 11, by pulling the release ring 421 towards the handle lever 3 against the biasing force of the coil spring 441, the engagement between the locking recess 410 of the head 411 and the locking claw 4342 of the lock ring 431 is released, and at the same time, the handle lever 3 (and its connecting shaft 32) is pulled off the rotating shaft 4. In this way, the handle lever 3 can be detached with a single touch.

[0053] In this way, when opening the door 9B of this equipment, as shown in Figure 12, the handle lever 3 is held and the lock ring 431 inside the release ring 421 is fitted with a single push onto the head 411 of the rotating shaft 4 of the handle seat 1. This causes the locking recess 410 of the head 411 and the locking claw 4342 of the lock ring 431 to engage, connecting the rotating shaft 4 and the handle lever 3. Then, as shown in Figure 10(2), the handle lever 3 is rotated from a nearly horizontal locked position to a nearly vertical unlocked position. As a result, the hook 2 rotates from the hook receiving portion 6 of the handle receiver h2 and is smoothly released by the guide surface a11G (see Figure 8(b)) of the locking surface covering portion a1 of the attachment A (see Figures 7 and 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.

[0054] When the handle lever 3 is rotated to the nearly vertical unlocked position as shown in Figure 10(2), (see Figure 3) the rotation of the handle lever 3 in the same direction is restricted by the abutment engagement between the projection 11T of the rotating shaft mounting portion 41 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. From this state, the door 9B is pulled down. The door 9B can then be opened smoothly.

[0055] 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 8(b)) of the locking surface covering portion a1 of the attachment A (see Figure 7) 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.

[0056] 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 11T of the rotating shaft mounting portion 41 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 central hook engagement portion a110 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. With the hook 2 locked 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, 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. After closing the door 9B, the handle lever 3 may be detached from the rotating shaft 4 of the handle base 1 if necessary. In this case, as previously described (see Figure 11), the lock release ring 421 is pulled towards the handle lever 3 against the biasing force of the coil spring 441, thereby releasing the engagement between the locking recess 410 of the head 411 and the locking claw 4342 of the lock ring 431, and simultaneously detaching the handle lever 3 (and its connecting shaft 32) from the rotating shaft 4.

[0057] 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, so 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.

[0058] As explained above, in this device H, the sealing handle h1 has a handle lever 3 connected to one end of the rotating shaft 4 via a detachable connecting part 4J, and the handle lever 3 can be attached to and detached from the rotating shaft 4 as needed. By connecting the handle lever 3 to the rotating shaft 4 when opening and closing the door, and disconnecting the handle lever 3 from the rotating shaft 4 when not opening or closing the door, even in equipment where the inside of the housing becomes hot, heat conduction is blocked, the handle lever 3 does not become hot, and the door can be opened and closed safely with this handle lever 3.

[0059] In particular, as previously described, this detachable connecting part 4J comprises the head 411 of the rotating shaft 4, the connecting shaft 32 of the handle lever 3, the unlocking ring 421 having a lock ring mounting part 423 and a connecting shaft insertion part 426, and the lock ring 431. The lock ring 431 is mounted inside the lock ring mounting part 423 of the unlocking ring 421, and the connecting shaft 32 of the handle lever 3 is inserted through the connecting shaft insertion part 426 of the lock ring 431 via a coil spring 441, biasing the connecting shaft 32 in the opposite direction to the lock ring mounting part 423. The tip of the connecting shaft 32 and the lock ring 431 are fastened together with screws. By fitting the ring 431, the locking recess 410 of the head 411 and the locking claw 4342 of the lock ring 431 are engaged, connecting the rotating shaft 4 and the handle lever 3. By pulling the release ring 421 towards the handle lever 3 against the biasing force of the coil spring 441, the engagement between the locking recess 410 of the head 411 and the locking claw 4342 of the lock ring 431 is released, separating the rotating shaft 4 and the handle lever 3. As a result, the handle lever 3 can be connected to the rotating shaft 4 with a single push, and the handle lever 3 can be removed from the rotating shaft 4 with a single touch, making it extremely easy to attach and detach the handle lever 3 from the rotating shaft 4.

[0060] Furthermore, in this detachable connecting portion 4J, the locking member 434 consists of a plate with a curved cross-section, the locking actuation portion 4341 having a convex portion at one end of one face, and a plate with a roughly V-shaped cross-section extending from the other end of one face toward the front of that face. The circumferential surface of the locking ring 431 is provided with a locking member mounting portion 4310, which consists of a locking actuation portion housing recess 431a formed on the outer circumferential surface side of the circumferential surface so that the locking actuation portion 4341 can be retracted with one end facing the connecting shaft insertion portion 426 and the other end facing the opposite direction, and having a convex engaging portion at one end, and a locking claw housing recess 431b formed on the inner circumferential surface side of the circumferential surface so that the locking actuation portion 4341 can be retracted, communicating with the locking actuation portion housing recess 431a. The locking member 434 is attached to the locking member mounting portion 4310 by having one end of the locking actuation portion 4341 pivot on the convex portion of the locking actuation portion housing recess 431a, and the other end protruding from the locking actuation portion housing recess 431a. Since the locking member 434 is attached to the locking member mounting portion 4310 in this way, a reliable locking operation can be obtained with a simple structure with a small number of parts, and at the same time, it can contribute to cost reduction.

[0061] In this device H, the handle lever 3 is formed in a roughly T-shape and consists of a grip 31 that extends in a roughly straight line and a connecting shaft 32 that extends perpendicularly from the center of the grip 31 in the longitudinal direction. A detachable connecting part 4J is connected to this connecting shaft 32. As a result, the detachable connecting part 4J (lock ring mounting part 423) can be easily connected to the rotating shaft 4 (head 411) of the handle base 1 with a single push while holding the grip 31 in the hand. Also, while holding the grip 31 in the hand, the lock release ring 421 can be pulled with a single touch using, for example, two fingers such as the index finger and middle finger, and the detachable connecting part 4J can be easily removed from the rotating shaft 4.

[0062] In this device H, an attachment A made of synthetic resin is further laminated onto the surface of the hook receiving portion 6 of the handle receiver h2 that contacts the hook 2, thereby preventing the generation of metal powder due to friction between the hook 2 and the hook receiving portion 6. 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.

[0063] Furthermore, in this device H, the rotating shaft 4 may be a single, integrated unit, or it may consist of a combination of multiple segmented shafts. In this embodiment, the latter is adopted.

[0064] As shown in Figure 2, the rotating shaft 4 is rotatably positioned within the handle base 1, with its tip protruding from the front surface 1F of the handle base 1. It consists of a base-side rotating shaft portion 11 which forms the rotating shaft mounting portion 41 described above, a hook-side rotating shaft portion 21A which is concentrically connected to the base-side rotating shaft portion 11 and has a hook 2, forming the hook mounting portion 42 described above, and a handle lever-side rotating shaft portion 21B which is operably connected to the hook-side rotating shaft portion 21 and forms the handle lever mounting portion 43 described above, in other words, a head 411 which is fitted onto the detachable connecting portion 4J. Furthermore, this rotating shaft 4 has shaft holes 110, 20, and 30 at the axes of the base-side rotating shaft portion 11, the hook-side rotating shaft portion 21A of the hook 2, and the handle lever-side rotating shaft portion 21B, respectively. These base-side rotating shaft portion 11, hook-side rotating shaft portion 21A, and handle lever-side rotating shaft portion 21B are operated and integrated by a fixed shaft S3 that is inserted and fixed between the respective shaft holes 110, 20, and 30.

[0065] As shown in Figure 2, 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 hole 110 at its axis. The shaft hole 110 may be a through hole or a threaded hole. 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 has 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, as shown in Figure 9, the front end of the front side is formed in a roughly rounded square cylindrical shape with a cross-section that is inscribed within the front side's cross-sectional shape (circular cross-section) so as to be able to engage (fit) with the connecting surface 201 (groove 200A) of the hook 2 described later, and its front surface (the tip surface of the base-side rotating shaft portion 11) forms the connecting surface 101, and four convex portions 1011 are formed to protrude in a hemispherical shape at 90° intervals around the shaft hole 110 of this connecting surface 101.

[0066] Furthermore, as previously described (see Figure 3), a projection 11T is provided on the circumferential surface of the base-side rotating shaft portion 11 to restrict the rotation range of the handle lever 3. The projection 11T protrudes from the outer circumferential surface of the large-diameter rear side of the base-side rotating shaft portion 11. In this case, the projection 11T is integrally formed with a part of the outer circumferential surface of the rear side of the base-side rotating shaft portion 11, in a rectangular, convex shape with a square cross-section.

[0067] As shown in Figure 2, the handle lever side rotating shaft portion 21B is a roughly rectangular cylindrical block shape with a shaft hole 30 at its axis. This shaft hole 30 is a threaded hole, which opens at the center of the rear end face and extends from this rear end face to the vicinity of the front end face. In this case, the front end of the handle lever side rotating shaft portion 21B is formed as a head 411, which is slightly smaller than the rear end of the base side rotating shaft portion 11, with a roughly regular hexagonal cross-section and rounded corners. On the outer circumference, a locking recess 410 is formed around the entire circumference, slightly towards the front in the axial middle, with a roughly U-shaped cross-section, and both sides of the bottom surface of this locking recess 410 are tapered so as to gradually widen from the inner circumference to the outer circumference. In addition, adjacent to this locking recess 410, the tip of the outer circumference of the head 411 is formed to protrude in a roughly arc-shaped cross-section, and a locking guide 4101 is provided. The rear side of the handle lever side rotating shaft portion 21B is formed in a square cylindrical shape with a roughly rounded cross-section so as to be able to engage (fit) with the connecting surface 202 (groove 200B) of the hook 2, similar to the front end of the base side rotating shaft portion 11 (see Figure 9), via a circular flange 43F having approximately the same diameter as the rear side of the base side rotating shaft portion 11. The rear surface (rear end surface of the handle lever side rotating shaft portion 31) forms the connecting surface 301, and four convex portions 3011 are formed in a hemispherical shape protruding at 90° intervals around the shaft hole 30 of this connecting surface 301.

[0068] As shown in Figure 2, the hook-side rotating shaft portion 21A is a cylindrical block shape with an axial hole 20 at its axis. Both end faces form the connecting surfaces 201 and 202 with the base-side rotating shaft portion 11 and the handle lever rotating shaft portion 31, respectively. The engagement position of the hook-side rotating shaft portion 21 between the hook 2 and the hook receiving portion 6 can be adjusted. The axial hole 20 of the hook-side rotating shaft portion 21A is formed as an elongated hole that is long in the direction of the engagement end of the handle receiving portion h2 of the hook 2 with the hook receiving portion 6. Furthermore, multiple recesses 2010 (see Figure 9) are provided along the circumference of the axial hole 20 on both end faces of the hook-side rotating shaft portion 21, that is, on the connecting surfaces 201 and 202 with the base-side rotating shaft portion 11 and the handle lever rotating shaft portion 21B, respectively, and multiple protrusions 1011 and 3011 of the connecting surfaces 101 and 301 of the base-side rotating shaft portion 11 and the handle lever rotating shaft portion 21B with the hook-side rotating shaft portion 21A can selectively engage with each other. In this case, each recess 2010 is formed in a hemispherical shape. In this way, by adjusting the insertion position of the fixed shaft S3 in the elongated hole forming the shaft portion 20 of the hook 2, the length between the fixed shaft S3 and the locking end of the hook 2 can be adjusted. In accordance with the insertion position of the fixed shaft S3 in the shaft hole 20, the connecting surfaces 201, 202 of the hook-side rotating shaft portion 21A and the connecting surfaces 101, 301 of the base-side rotating shaft portion 11 and the handle lever-side rotating shaft portion 31 can be fixed by engagement with each of the aforementioned recesses 2010 (see Figure 6) and protrusions 1011, 3011 (see Figures 4 and 5), thereby allowing the engagement position between the hook 2 and the hook receiving portion 6 to be adjusted.

[0069] In this case, the shaft 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 21A 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 21A 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 21B.

[0070] A rectangular groove 200A with a rounded cross-section, slightly longer in the long axis direction of the shaft hole (elongated hole) 20 than the front end of the base-side rotating shaft portion 11, is formed at the center of the connecting surface 201 of the hook-side rotating shaft portion 21A with 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. An elongated hole, which serves as the shaft 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 shaft 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 shaft hole 20 and three in parallel on each side in the short direction. These recesses 2010 are formed in a hemispherical shape.

[0071] Furthermore, at the center of the connecting surface 202 of the hook-side rotating shaft portion 21A with the handle lever-side rotating shaft portion 21B, a rectangular groove 200B with a rounded cross-section, slightly longer in the longitudinal direction of the elongated hole than the front end of the handle lever-side rotating shaft portion 21B, is formed so that the front end of the handle lever-side rotating shaft portion 21B can be fitted into it, similar to the connecting surface 201 of the base-side rotating shaft portion 11. An elongated hole, which serves as the shaft hole 20, is provided at the center of the bottom surface of this groove 200B. And, similar to the connecting surface 201 of the base-side rotating shaft portion 11, a plurality of recesses 2010 are provided on the bottom surface of this groove 200B along the periphery of the shaft hole 20 so that a plurality of protrusions 3011, in this case four, of the handle lever-side rotating shaft portion 21B can selectively engage with it. In this case, the plurality of recesses 2010 are formed radially on the bottom surface of the groove 200B, one on each side in the longitudinal direction of the shaft hole 20 and three in parallel on each side in the short direction. These recesses 2010 are formed in a hemispherical shape.

[0072] A screw (hereinafter referred to as screw S3) is used as a fixed shaft S3 to connect the base-side rotating shaft portion 11, the handle lever-side rotating shaft portion 21B, and the hook-side rotating shaft portion 21A within the handle base 1. In this case, screw S3 is inserted through the shaft hole 110 of the base-side rotating shaft portion 11 within the handle base 1, and is tightened through the shaft hole 20 of the hook-side rotating shaft portion 21 into the shaft hole 30 of the handle lever-side rotating shaft portion 31, thereby connecting and fixing the entire rotating shaft 4.

[0073] In this manner, when one of the sealing handle h1 or the handle receiver h2 is attached to the frame side around the opening of the housing with mounting screws, and the other is attached to the door side with mounting screws, the engagement position between the hook 2 and the hook receiver 6 is adjusted as needed. That is, the hook 2 can be extended or retracted. In this case, the length between the screw S3 and the locking end of the hook 2 is adjusted by adjusting the insertion position of the screw S3 in the elongated hole forming the shaft portion 20 of the hook 2. Then, in accordance with the insertion position of the screw S3 in the shaft hole 20, the connecting surfaces 201, 202 of the hook-side rotating shaft portion 21A and the connecting surfaces 101, 301 of the base-side rotating shaft portion 11 and the handle lever-side rotating shaft portion 21B engage their respective recesses 2010 and protrusions 1011, 3011 with each other, and fix this state. In this case, the screw S3 is tightened into the shaft hole 30 of the handle lever-side rotating shaft portion 21B to fix the entire rotating shaft 4. More specifically, it is as follows. Please refer to Figure 9.

[0074] To extend the hook 2, as shown in Figure 9(2), the hook 2 can be extended by inserting the screw S3 into the elongated hole forming the shaft hole 20 of the hook 2 at the end of the hook 2 opposite to the claw 22. In line with the insertion position of the screw S3 in the shaft hole 20, the connecting surfaces 201, 202 of the hook-side rotating shaft portion 21A and the connecting surfaces 101, 301 of the base-side rotating shaft portion 11 and the handle lever-side rotating shaft portion 21B are engaged with each other's recesses 2011 and protrusions 1011, 3011. This state is then fixed by tightening the screw S3 into the shaft hole 30 of the handle lever-side rotating shaft portion 21B. To retract the hook 2, as shown in Figure 9(1), the hook 2 can be retracted by inserting the screw S3 into the elongated hole forming the shaft hole 20 of the hook 2 at the end of the hook 2 on the claw side. In line with the insertion position of the screw S3 in the shaft 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 21B are engaged with each other's recesses 2011 and protrusions 1011, 3011. This state is then fixed by tightening the screw S3 into the shaft hole 30 of the handle lever-side rotating shaft portion 21B. To extend the hook 2 to an intermediate position, the screw S3 is inserted midway through the elongated hole forming the shaft hole 20 of the hook 2. In line with the insertion position of the screw S3 in the shaft hole 20, the connecting surfaces 201 and 202 of the hook-side rotating shaft portion 21A and the connecting surfaces 101 and 301 of the base-side rotating shaft portion 11 and the handle lever-side rotating shaft portion 21B are engaged with each other's recesses 2010 and protrusions 1011 and 3011. This state is then fixed by tightening the screw S3 into the shaft hole 30 of the handle lever-side rotating shaft portion 21B.

[0075] Thus, the base-side rotating shaft portion 11 of the handle base 1, the handle lever-side rotating shaft portion 21B of the handle lever 3, and the hook-side rotating shaft portion 21 of the hook 2 each have shaft holes 110, 20, and 30, respectively, and the base-side rotating shaft portion 11, the handle lever-side rotating shaft portion 21B, and the hook-side rotating shaft portion 21A are operatedly connected by screws S3 inserted between the respective shaft holes 110, 20, and 30. Furthermore, the shaft hole 20 of the hook-side rotating shaft portion 21A is formed as an elongated hole that is long toward the engagement end direction of the handle receiver h2 of the hook 2, and the hook-side rotating shaft portion 21A has multiple recesses 2010 along the circumference of the shaft hole 20 on the respective connecting surfaces 201 and 202 between the hook-side rotating shaft portion 21A and the base-side rotating shaft portion 11 and the handle lever rotating shaft portion 21B. In contrast, the base-side rotating shaft portion 11 and the handle lever rotating shaft portion 21B have multiple protrusions 1011 and 3011 on their connecting surfaces 101 and 301 with the hook-side rotating shaft portion 21A, respectively, which are capable of selectively engaging with the multiple recesses 2010 on the connecting surfaces 201 and 202 of the hook-side rotating shaft portion 21A. By adjusting the insertion position of the screw S3 in the elongated hole forming the shaft hole 20 of the hook 2, the length between the screw S3 and the locking end of the hook 2 can be adjusted. In accordance with the insertion position of the screw S3 in the shaft hole 20, the connecting surfaces 201 and 202 of the hook-side rotating shaft portion 21A and the connecting surfaces 101 and 301 of the base-side rotating shaft portion 11 and the handle lever-side rotating shaft portion 21B can be fixed by engaging with each other's recesses 2010 and protrusions 1011 and 3011, 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.

[0076] Furthermore, in this device H, as shown in Figure 3, 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 at least in the engaged state between the hook 2 of the sealing handle h1 and the hook receiving portion 6 of the handle receiver h2, that is, in the engaged position between the hook 2 and the hook receiving portion 6. This leaf spring 7 maintains the engaged state between the hook 2 and the hook receiving portion 6.

[0077] Here, the handle base 1 is provided with a leaf spring mounting portion 113 for attaching a leaf spring 7. 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 front view and the rotating shaft insertion hole 10, with the ends of the leaf spring 7 engaging with it from the other side to the one side of the rectangular portion in front view. The leaf spring mounting portion 113 is formed in a substantially hook shape (substantially L-shaped cross-section).

[0078] 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 pressure surface support portions 72 on both sides thereof. The leaf spring 7 is attached by inserting the support portions 72 on both sides into both ends of the leaf spring mounting portion 113 of the handle base 1, that is, a roughly hook-shaped portion in 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 toward the rotation axis 4 of the handle lever 3 with its outer surface (the surface facing the rotation axis 4 of the handle lever 3) as the pressure surface 7P.

[0079] Furthermore, it is preferable that 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 114 (114A) that receives the pressing surface 7P of the leaf spring 7, and that the pressing surface 7P of the leaf spring and the pressure-receiving surface 114 (114A) of the base-side rotating shaft portion 11 are formed so that they can contact each other in parallel, or so that one of the pressing surface 7P of the leaf spring 7 and the pressure-receiving surface 114 of the base-side rotating shaft portion 11 can contact the other at an oblique angle in the engagement direction between the sealing handle h1 and the handle receiver h2.

[0080] 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. Here, it is preferable that 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 114 (114B) that receives the pressing surface 7P of the leaf spring 7, and that the pressing surface 7P of the leaf spring 7 and the pressure-receiving surface 114 (114B) of the base-side rotating shaft portion 11 are formed so that they can contact each other in parallel, or so that one of the pressing surface 7P of the leaf spring 7 and the pressure-receiving surface 114 (114B) of the base-side rotating shaft portion 11 can contact the other at an oblique angle in the non-engagement direction between the sealing handle h1 and the handle receiver h2.

[0081] In this case, the circumferential surface of the base-side rotating shaft portion 11 is provided with a pressurized surface 114 that can engage with the leaf spring 7 provided inside the handle base 1.

[0082] 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. 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 to one side rather than 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.

[0083] 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.

[0084] In this way, 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, allowing the housing to be reliably sealed 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 can contact the other at an oblique angle in the engagement direction between the sealing handle h1 and the handle receiver h2, thereby increasing the pressure applied to the circumferential surface of the base-side rotating shaft portion 11. This allows the lock position of the handle lever 3 and the engagement between the hook 2 and the hook receiver 6 to be held more securely, thereby allowing the housing to be more securely sealed by the door.

[0085] Furthermore, within the handle base 1, a leaf spring 7 is provided so as to be able to press 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 so as to be able to press 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, and 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 angle in the direction of non-engagement between the sealing handle h1 and the handle receiver h2. In this way, the pressure applied to the circumferential surface of the base-side rotating shaft portion 11 is increased, so that the unlocked position of the handle lever 3 and the disengagement of the hook 2 and the hook receiving portion 6 can be more reliably maintained. 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.

[0086] Therefore, as shown in Figure 10, when opening the door 9B of this equipment, if the handle lever 3 is rotated from a substantially horizontal locked position to a substantially vertical unlocked position, 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 comes into contact with 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 circumferential surface of the base-side rotating shaft portion 11 that is close to the projection 11I disengages from the pressurized surface 7P of the leaf spring 7, and the pressurized surface 7P of the leaf spring 7 engages with the arc-shaped surface 114C on the outer circumferential surface of the base-side rotating shaft portion 11, causing the pressurized surface portion 71 of the leaf spring 7 to be pushed up by the arc-shaped surface 114C. 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 11T 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 11T 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.

[0087] When closing door 9B, grip the handle lever 3 and push door 9B upward toward the front of housing 9A, fitting it into the recess 91 on the front of housing 9A. In this state (see Figure 10(2)), when the handle lever 3 is rotated from the unlocked position to the locked position, 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 11T on the outer circumference of the base-side rotating shaft portion 11 that is pressurized, 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. 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 11T of the base-side rotating shaft portion 11 and one of the stoppers 111. 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 pressure surface 7P of the leaf spring 7 of the leaf spring mounting portion 113 disengages from the pressure surface 7P of the leaf spring 7. The pressure surface 7P of the leaf spring 7 and one of the pressurized surfaces 114A on the outer circumference of the base-side rotating shaft portion 11, which is closer to the projection 11T, are pressed together and engage, so that the locked state of the hook 2 is securely maintained and the handle lever 3 is securely kept in the locked position. Therefore, the hook 2 and the handle lever 3 do not wobble or rattle. By locking the hook 2 into the hook receiving portion 6 in this manner, 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, 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. In particular, in this device H, the locked state of the hook 2, that is, the locked position of the handle lever 3, is maintained by the leaf spring 7, so even if the restorability of the reaction force decreases due to the deterioration of the packing 92 over time, the strong engagement between the hook 2 and the hook receiving portion 6, that is, the interlocking (pressing) due to great pressure is maintained, and the handle lever 3 in the locked position does not droop due to its own weight, or the handle lever 3 droops and the hook 2 comes off the hook receiving portion 6 and the door 9B opens, as in conventional devices.

[0088] 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.

[0089] Furthermore, in this embodiment, the hook-side rotating shaft portion 21 has multiple recesses 2010 along the circumference of the shaft 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 21B, and the connecting surfaces 101 and 301 of the base-side rotating shaft portion 11 and the handle lever rotating shaft portion 21B with the hook-side rotating shaft portion 21A 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 21A. However, conversely, the hook-side rotating shaft portion may have multiple protrusions along the circumference of the elongated hole on each connecting surface 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 with the hook-side 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]

[0090] 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 hole (through hole or threaded hole) 11G step surface 11T 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 hole (long hole) 200A groove 200B Groove 201 Connecting surface 202 Connecting surface 2010 Recess 21A Hook-side rotating shaft 22 claws 3. Handle lever 30 Shaft holes (screw holes) 301 Connecting surface 3011 Convex part 21B Handle lever side rotation shaft 31 Grip 311 Plate-like part 32 Connecting shaft 321 Central cylindrical part 322 Extended cylindrical section 323 Square tube part 32S threaded hole 4 rotation axes 41 Rotating shaft mounting section 41G Step surface 42 Hook attachment section 43 Handle lever mounting section 43F Flange 43G Step surface S3 Fixed shaft (screw) 4J Detachable connecting section 410 Locking recess 4101 Locking Guide 411 head 421 Unlock Ring 422 recess 423 Lock ring mounting section 424 Connecting shaft insertion section 425 Finger rest 426 Connecting shaft insertion part 431 Lock Ring 4310 Locking component mounting part 431a Recess for housing the locking mechanism 431b Locking claw storage recess 432 Connecting shaft connection part 4320 Screw insertion hole 4321 Groove 4322 Receiving part 441 Spring component (coil spring) S1 screw 433 Aperture 434 Locking component 4341 Locking mechanism 4342 Locking claw 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 S2 screw a21 flat 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 sealing handle consisting of 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 one of the sealing handle or the handle receiver is provided on the door side and the other is provided on the frame side around the opening of the housing, and the door is pressed against the frame around the opening of the housing by the engagement of the hook of the sealing handle and the hook receiving portion of the handle receiver, The sealing handle is configured such that the handle lever is connected to one end of the rotating shaft via a detachable connector. The aforementioned detachable connecting part is The head, which has one end of the rotating shaft formed in a substantially cylindrical shape and has a locking recess on its outer surface, A connecting shaft is integrally formed with the handle lever and protrudes from the handle, A lock release ring comprising a lock ring mounting portion formed in a substantially cylindrical shape with one end open and having a circumferential recess on the inner peripheral edge of the opening at one end, and a connecting shaft insertion portion formed in a substantially cylindrical shape with the other end open and communicating with the lock ring mounting portion by a connecting shaft insertion portion, and having a finger grip portion on its outer peripheral surface, A locking member is provided on the locking ring, which is formed in a substantially cylindrical shape so as to be fitted onto the head and so as to be fitted onto the locking ring mounting portion of the release ring, and is provided on the circumferential surface so as to be retractable from the outer circumferential surface of the circumferential surface and normally so as to protrude from the outer circumferential surface of the circumferential surface, and is provided in relation to the release ring, such that a locking actuation portion is retracted into the outer circumferential surface of the circumferential surface by pressure from the inner circumferential surface of the locking ring mounting portion and is guided to protrude from the outer circumferential surface of the circumferential surface by the recess of the locking ring mounting portion, and a locking claw is provided so as to be retractable from the inner circumferential surface of the circumferential surface, and in conjunction with the retraction of the locking actuation portion into the outer circumferential surface of the circumferential surface, it protrudes from the inner circumferential surface of the circumferential surface and engages with the locking recess of the head, and in conjunction with the protrusion of the locking actuation portion from the outer circumferential surface of the circumferential surface, Equipped with, The lock ring is mounted within the lock ring mounting portion of the unlock ring, the connecting shaft of the handle lever is inserted through the connecting shaft insertion portion of the lock ring via a spring mechanism, biased in the direction opposite to the lock ring mounting portion, and the tip of the connecting shaft and the lock ring are connected. By fitting the lock ring within the release ring onto the head of the rotating shaft, the locking recess of the head and the locking claw of the lock ring are engaged, thereby connecting the rotating shaft and the handle lever. By pulling the release ring toward the handle lever against the biasing force of the spring, the engagement between the locking recess of the head and the locking claw of the lock ring is released, thereby separating the rotating shaft and the handle lever. A sealed handle device characterized by the following features.

2. The locking member comprises a plate with a curved cross-section and a convex portion at one end of one face, and a locking claw extending from the other end of one face of the plate in a substantially V-shape in cross-section toward the front of that face, and the locking member mounting portion comprising a locking member mounting portion formed on the outer circumferential surface side of the circumferential surface, into which the locking member is retractable with one end facing the connecting shaft insertion portion and the other end facing the opposite direction, and having an engaging portion of the convex portion at one end, and a locking claw mounting portion formed on the inner circumferential surface side of the circumferential surface, communicating with the locking member mounting portion and into which the locking claw is retractable, and the locking member is attached to the locking member mounting portion as described in claim 1, wherein the locking member is engaged with the engaging portion of the locking member mounting portion recess with the convex portion at one end as a fulcrum, and the other end protrudes from the locking member mounting portion.

3. The handlebar device according to claim 1 or 2, wherein the handlebar lever is formed in a substantially T-shape and comprises a grip extending substantially in a straight line and a connecting shaft extending perpendicularly from the center of the grip in the longitudinal direction.

4. The handle device according to claim 1 or 2, comprising: a base-side rotating shaft portion rotatably arranged within the handle base and having its tip protruding from the front surface of the handle base; a hook-side rotating shaft portion concentrically connected to the base-side rotating shaft portion and having a hook; and a handle lever-side rotating shaft portion operably connected to the hook-side rotating shaft portion and forming a head that fits onto a detachable connecting portion.

5. The handle device according to claim 1 or 2, wherein a leaf spring is provided within the handle base 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 handle lever and the hook receiving portion of the handle receiver are engaged.

6. The handle device according to claim 5, wherein the leaf spring has a flat pressing surface that can be pressed against the circumferential surface of the rotating shaft portion on the base side, and the circumferential surface of the rotating shaft portion on the base side 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 rotating shaft portion on the base side 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 rotating shaft portion on the base side can contact the other at an angle in the engagement direction between the sealing handle and the handle receiver.

7. A sealing handle device according to claim 5, wherein a leaf spring is provided within the handle base so as to be able to press against the circumferential surface of the base-side rotating shaft portion in a state in which the hook of the handle lever and the hook receiving portion of the handle receiver are not engaged, the leaf spring has a flat pressing surface so as to be able to 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, and 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 in parallel, or so as to be able to contact the other at an angle in the direction in which the sealing handle and the handle receiver are not engaged.

8. The handle device according to claim 1 or 2, wherein an attachment made of synthetic resin is laminated and mounted on the surface of the hook receiving portion of the handle holder that contacts the hook.

9. The handle device according to claim 1 or 2, 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.

10. The base-side rotating shaft, the handle lever-side rotating shaft, and the hook-side rotating shaft each have shaft holes in their axes, and the base-side rotating shaft, the handle lever-side rotating shaft, and the hook-side rotating shaft are operably connected by a fixed shaft fixed between each of the shaft holes, the shaft hole of the hook-side rotating shaft is formed as an elongated hole toward the engagement end of the hook with the handle receiver, and the connection surfaces of the hook-side rotating shaft with the base-side rotating shaft and the handle lever-side rotating shaft have a plurality of recesses or protrusions along the periphery of the elongated hole, and the connection surfaces of the base-side rotating shaft and the handle lever-side rotating shaft with the hook-side rotating shaft The handle device according to claim 1 or 2, 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, and the length between the connecting shaft and the locking end of the hook-side rotating shaft portion can be adjusted by adjusting the insertion position of the connecting shaft in the elongated hole that forms the shaft hole of the hook-side rotating shaft portion, so that each connecting surface of the hook-side rotating shaft portion and each connecting surface of the base-side rotating shaft portion and the handle lever-side rotating shaft portion can be fixed by mutual engagement with the respective recesses and protrusions, thereby allowing the engagement position between the hook and the hook receiving portion to be adjusted.

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