JP6684083B2 - Sealing safety handle - Google Patents

Description

  The present invention relates to a sealing safety handle that is attached to a door that seals an entrance / exit of a storage such as a commercial refrigerator or a prefabricated refrigerator / freezer, and is used for closing and locking the door. The present invention relates to a sealing safety handle of a type that is disengaged from a receiving portion on the side and the engagement between the latch and the receiving portion is released by operating a push rod in the refrigerator.

  In general, large-scale storages such as commercial refrigerators and prefabricated refrigerators and refrigerators are designed to be opened and closed by operating an operation handle outside the storage, which has a door that seals the loading / unloading port. In addition, in this type of storage, since the worker enters and exits the storage through the access port and stores the stored items in and out, in case the door is closed while the worker is working in the storage, The door can be opened by operating the push rod inside. A door lock handle device used for such a door has been proposed in Patent Document 1 and the like.

  The door lock handle device of Patent Document 1 is proposed by the applicant of the present application. As shown in FIGS. 20 and 21, this device is connected to a device body 91 mounted on the door by a pivot. The operation handle 92, the latch 93 mounted on the device body 91 so as to be able to move forward and backward, the operation lever 94 which is connected to the inside of the device body 91 by a pivot and is pushed by the operation handle 92 to slide the latch 93 backward. A reset lever 96, which is connected to the inside of the apparatus body 91 by a pivot and drives the operating lever 94 when pushed by the inside push bar 95, and a reset lever 96 that is fixed to the apparatus body 91 and disengages from the latch 93. To the rotor 980. A lock plate 97 for stopping the lock and a lock cam 981 for releasing the engagement between the lock plate 97 and the latch 93 are attached to the rotor 980. The lock 98 attached to the lock lever 98 rotates the reset lever 96 with the inside push rod 95 to release the engagement between the lock plate 97 and the latch 93. The rotation of the operating lever 94 linked to the reset lever 96 causes the latch to rotate. 93 is slid backward.

Japanese Utility Model Publication No. 60-70157

However, the conventional door lock handle device has the following problems.
(1) In this device, as shown in FIG. 21, the operating lever 94 is engaged with the latch 93, and the operating lever 94 is turned by the turning operation of the operating handle 92 to slide the latch 93 backward. However, in this case, the actuating lever 94 is composed of a pair of plates, and the reset lever 96 is arranged between these plates to be engaged with the latch 93. Since there is no room for reinforcement such as increasing the thickness of the plate, it is impossible to increase the strength of the operating lever 94 which is repeatedly abuttingly engaged with the latch 93.
(2) In this device, as shown in FIG. 21, the reset lever 96 is connected to the pivot of the operation handle 92, is rotated when pushed by the inside push rod 95, and pushes the lock plate 97 at the tip. While the engagement between the lock plate 97 and the latch 93 is released, the operating lever 94 is rotated at the rear end, and the rotation of the operating lever 94 causes the latch 93 to slide backward. Since the lever 96 is composed of a pair of plates and is arranged between the pair of plates forming the operation lever 94 as described above, there is no room for reinforcement such as increasing the thickness of each plate of the reset lever 96 due to this structure. In addition, the reset lever 96 is formed with an arc-shaped elongated hole, through which (another) pivot inserted through (between both side surfaces of) the operation handle 92 is inserted. Therefore, an amount corresponding to the elongated hole, the strength is low, it can not be achieved for an increase in the intensity of the reset lever 96. In addition, the reset cover 96 is formed with an arc-shaped elongated hole, and the (other) pivot inserted through the operation handle 92 is inserted through the elongated hole, which complicates the structure.
(3) In this device, as shown in FIG. 21, a pair of plates forming the operating lever 94, and a pair of plates forming the reset lever 96 between these plates are attached to the pivot shaft of the operation handle 92, respectively, and mutually. Since the operation lever 94 and the reset lever 96 are closely arranged in parallel, the operation lever 94 and the reset lever 96 easily rattle.

  The present invention solves such a conventional problem. In this type of handle, the operating lever, the reset lever are reinforced, and the operating handle, the operating lever, and the reset lever have a simple structure to provide an operating lever. The purpose of the present invention is to attach the reset lever without rattling, and thereby to ensure the forward and backward movement of the latch by the operation handle can be carried out reliably and smoothly.

In order to achieve the above object, the present invention provides
It is attached to one end of the front side of the door that seals the entrance of the storage and it is fixed to the side edge of the entrance of the storage, the latch is disengaged by the handle operation outside the storage, and the push rod inside the storage. A sealing safety handle of a type in which the engagement between the latch and the receiving portion is released by an operation,
The whole is formed in a long box shape and has a latch mounting portion having an opening at one end surface at one end side, a handle mounting portion having an opening from the front middle portion to the other end surface at the other end side, the latch mounting portion and the handle mounting A lock unit mounting portion having an opening at the front between the lock unit mounting portion and a lock plate mounting portion facing the lock unit mounting portion, the push bar insertion portion facing the handle mounting portion, A main body case attached to the door with the opening facing the receiving portion on the storage side,
It has a claw portion at one end and a locking groove on the other end side of the back surface, is arranged in the latch mounting portion so as to be able to move forward and backward in both ends of the main body case, and as a normal state of the latch mounting portion by a spring member. A latch that is biased toward the opening so that the claw portion projects from the opening;
The handle has a hook and an actuating lever accommodating portion at one end side, and the hook and the other end of the latch are engageable with each other so that the one end side is connected to the handle attaching portion via a handle rotation shaft. An operation handle which is rotatably and rotatably mounted in the opening, and rotates the hook toward the other end of the handle mounting portion by a rotation operation from the handle mounting portion in a standing direction to drive the latch backward.
A locking portion is provided at one end, and the locking portion and the other end of the latch are rotatably attached to the handle rotation shaft of the handle mounting portion so that the other end of the latch is engageable, and one end side is the operation of the operation handle. The lever is accommodated in the lever accommodating portion in a detachable manner, and the other end extends to the push rod insertion portion, and the hook of the operating handle and the locking portion are moved toward the other end of the handle mounting portion by rotating the operating handle in the upright direction. To drive the latch backward, and the other end receives a pressure from the back side of the main body case in the front direction to move the locking part from the actuating lever storage part to the other end direction of the handle mounting part. An actuating lever that is pivoted away to drive the latch backwards independently of the hook of the operation handle;
The lock plate attachment portion is attached to the lock plate attachment portion so as to be tiltable between the lock plate attachment portion and the latch groove, and is normally engaged with the latch groove of the latch by a spring means to restrict the retreat of the latch. Lock plate,
The lock unit is inserted into the lock unit mounting portion and a key hole is exposed in the opening on the front of the main body case, and the lock unit is of a type in which the rotor is rotated by the operation of the key inserted into the key hole, and the lock unit is connected to the rotor. By the unlocking operation of the lock unit, the lock plate is press-engaged with the lock plate mounting portion to release the engagement between the lock plate and the other end of the latch, and the lock unit is locked. A lock cam for releasing the pressure engagement with the lock plate and engaging the lock plate with the locking groove of the latch by the urging force of the spring means,
It has a pressing portion at one end and a pressing operation portion at the other end, and is parallel to the handle rotating shaft at the other end side of the operating lever than the handle rotating shaft of the handle mounting portion at the intermediate portion of the operating lever. Is rotatably mounted via a shaft disposed on the lock plate, the pressing portion is disposed on the lock plate, and the pressing operation portion is provided between the push rod insertion portion and the other end of the operation lever. The other end receives a pressure in the front direction from the back side of the main body case, and the other end of the operation lever is pressed and rotated by the pressing operation part, and the lock plate is locked by the pressing part. A reset lever that pushes and tilts to the mounting part,
A push rod that is inserted into the push rod insertion portion from the back side of the door through the door, and pushes the pressing operation portion of the reset lever from the back surface of the body case to the front direction.
Equipped with
By rotating the operation handle outside the refrigerator in the upright direction, the latch is retracted by the hook of the operation handle and the engaging portion of the operating lever to disengage the latch from the receiving portion,
By pressing the push rod in the refrigerator, the lock lever and the other end of the latch are disengaged by the reset lever, and the actuating lever is pivoted away from the actuating lever housing portion of the operation handle. Driving the latch backward by the locking portion of the operating lever,
That is the summary.
The handle is preferably embodied as follows.
(1) The hook of the operation handle is formed at the center in the width direction at one end on the back surface of the operation handle, and the operation lever housing portion of the operation handle has the operation lever fitted on both sides of the hook at one end on the back surface of the operation handle. The operating lever is formed in a matable groove shape, and the operating lever includes a pair of lever members and is housed in the operating lever housing portion.
(2) The hook of the operation handle is formed in a substantially hook shape, and the operation lever is formed in a substantially V shape as a whole, and the locking portion is formed in a hook shape substantially the same as the hook of the operation handle to reset. The lever is formed in a substantially V shape as a whole, the pressing portion is formed in a substantially natter shape, and the pressing operation portion is formed in a substantially wing shape.
(3) The latch mounting portion of the main body case is erected upright in the middle of the latch in the longitudinal direction at the installation position of the latch so as to face the opening of the main body case and to hold the end of the coil spring. A second spring retainer member having a substantially flat plate-like first spring retainer member and a substantially semicircular holding portion that is provided in parallel with the spring retainer member and is capable of retaining the periphery of the end side of the coil spring. The latch has a pair of frames, one end side of which is formed into a claw shape with a U-shaped cross section and is connected to the main body section, which forms the outer shape of the entire latch, and one end side of each frame of the main body section. It is fitted and fixed in a U-shaped cross section, and is installed between a claw member that forms a claw part of a latch and the other end of each frame of the main body part, and is engaged with a hook of an operation handle and a locking part of an operating lever. Has a latch shaft that forms the other end of the latch A recess is formed on a surface of the pawl member facing the other end of the latch so that the end of the coil spring can be fitted to the latch, and the latch is installed in the latch mounting portion. A double coil spring, in which a coil spring having a small diameter is incorporated into the spring, has one end fitted in the recess of the pawl member, and the other end of the other end of the latch mounting portion provided by the first spring pressing member. The periphery is pressed by the second spring pressing member and is arranged between the claw member and the first spring pressing member.

  According to the safety handle of the present invention, the actuating lever is provided with the locking portion at one end and is rotatably attached to the handle rotating shaft of the handle mounting portion so that the one end side can be detached from the actuating lever accommodating portion of the operation handle. Store the other end, extend the other end to the push rod insertion part, and rotate the operating handle in the upright direction to rotate the latch part together with the hook of the operating handle toward the other end of the handle mounting part to drive the latch backwards. When the end is pressed from the back side of the body case to the front side, the locking part is detached from the actuating lever storage part toward the other end of the handle mounting part and rotated, and the latch is driven backwards independently from the hook of the operation handle. The reset lever is provided with a pressing part at one end and a pressing actuating part at the other end, and is parallel to the handle rotation axis on the other end side of the operation lever than the pivot of the handle attachment part at the intermediate part of the operation lever. It is rotatably attached via the shaft provided, the pressing portion is arranged on the lock plate, the pressing operating portion is arranged between the push rod insertion portion and the other end of the operating lever, and the main body case is arranged at the other end. When the pressure actuating portion presses and pivots the other end of the actuating lever from the back side of the actuating side, and the pushing part tilts the lock plate to the lock plate mounting portion, the actuating lever is moved. It can be reinforced by the hook of the operating handle, and this structure also allows the actuating levers to be placed in parallel on both sides of the hook of the operating handle and the reset lever in the same row as the operating handle, in this way This allows you to secure a sufficient space for the reset lever and increase the thickness of the reset lever to reinforce it. A special structure unique to the present invention in which the operation lever and the reset lever can be attached without rattling with a simple structure between the levers, and thereby the latch can be reliably advanced and retracted by the operation handle. Has a great effect.

The figure which shows the structure of the safety handle for sealing which concerns on one Embodiment of this invention ((a) is a front view, (b) is plane sectional drawing, (c) is a rear view) The figure which shows especially the structure of the case of the same safety handle ((a) is a front view (b) is a top view (c) is a rear view) The figure which shows especially the structure of an attachment base of the same safety handle ((a) is a front view, (b) is a top view, (c) is a plane sectional view) Diagram showing the structure of the groove and cap of the safety handle, especially the case (cross section) The figure which shows the structure of the bearing of the same safety handle especially the case (cross section) A view (cross-sectional view) showing the structure of the bearing of the safety handle, particularly the bearing of the case and the handle rotating shaft of the operation handle. A view showing the structure of the bearing of the safety handle, especially the bearing of the case and the handle rotating shaft of the operation handle (exploded perspective view) The figure which shows the structure of the bearing especially of the same safety handle ((a) is a front view (b) is a top view (c) is a rear view (d) is a left end view) The figure which shows especially the structure of the operation handle of the same safety handle ((a) is a front view, (b) is a top view, (c) is a plane sectional view, (d) is a rear view) The figure which shows especially the structure of the operating lever of the same safety handle (plan view) The figure which shows especially the structure of a lock plate of the same safety handle ((a) is a front view (b) is a top view) The figure which shows especially the structure of the lock cam of the same safety handle (cross section) The figure which shows especially the structure of the reset lever of the same safety handle ((a) is a top view (b) is a front view) The figure which shows the example of attachment to the door of the storage of the same safety handle (plan sectional view) Diagram showing the operation of the safety handle (plan sectional view) Diagram showing the operation of the safety handle (plan sectional view) Diagram showing the operation of the safety handle (plan sectional view) Diagram showing the operation of the safety handle (plan sectional view) Diagram showing the operation of the safety handle (plan sectional view) The figure which shows the structure of the conventional lock handle device for doors (front view). The figure which shows the internal structure of the lock handle device for doors (plan sectional drawing)

  Next, a mode for carrying out the present invention will be described with reference to the drawings. FIG. 1 shows a sealing safety handle handle (hereinafter simply referred to as a safety handle).

As shown in FIG. 1, the safety handle H is attached to one end on the front pivot side of a door that seals the entrance / exit of a large storage such as a commercial refrigerator or a prefabricated refrigerator / freezer, in this case, the left end, and the entrance / exit of the storage. It is of a type in which the latch is engaged and disengaged by the handle operation outside the refrigerator to the receiving portion fixed to the left edge portion of the container, and the engagement between the latch and the receiving portion is released by operating the push rod inside the container. The operating lever 5 in the main body case 1 is attached to one end side of the case 1, in this case, the left end side, and the claw portion 22 is arranged to be retractable from the opening 11 of the one end surface of the main body case 1, in this case, the left end surface. , A latch 2 operatively connected to a latch drive mechanism D including a reset lever 6, a lock unit 7, and a lock plate 8 and the other end side of the main body case 1, in this case, the right end side from the front middle portion to the other end surface. In this case, the operation handle 3 that is rotatably and rotatably mounted via the handle rotation shaft 32 in the opening 13 formed to the right end surface and is operatively connected to the latch drive mechanism D in the main body case 1, and the main body case 1. And a push rod 4 (see FIG. 14) which is inserted into a push rod insertion portion 19 formed to face the front opening 13 on the back surface of the main body 1 and is operatively connected to the latch drive mechanism D in the main body case 1. .

The main body case 1 is made of an aluminum alloy, and as shown in FIGS. 2 and 3, a case 10 that forms the front surface of the main body case 1 and the peripheral surfaces (upper side surface, left end surface, lower side surface, right end surface). , An aluminum alloy, and a mounting base 17 that forms the back surface of the main body case 1, and is formed into a horizontally long box shape as a whole. One end side, in this case, the left end side is on one end face, in this case, the left end face. The latch mounting portion 12 having the opening portion 11, the other end side, in this case, the right end side is the vertical middle of the front, and the handle mounting portion 14 having the opening 13 from the middle portion in the horizontal direction to the other end surface, in this case, the right end surface, the latch A lock unit mounting portion 16 having an opening 15 in the front is provided between the mounting portion 12 and the handle mounting portion 14, and a lock plate is mounted on a mounting base 17 on the rear surface so as to face the lock unit mounting portion 16. 18, the push rod insertion portion 19 to face the handle mounting portion 14 are respectively provided.
In this case, as shown in FIG. 2, the case 10 has a substantially isosceles trapezoidal basic shape in a cross section at right angles to the forward / backward direction of the latch 2, and both upper and lower side surfaces spread from the front side toward the rear side. In addition, between the front surface and each peripheral surface (upper side surface, left end surface, lower side surface, right end surface) and between the front peripheral surfaces (upper side surface, left end surface, lower side surface, right end surface) are curved. Further, the upper and lower side surfaces are tapered on the left end side so that the width gradually narrows toward the left end surface, thereby forming a substantially streamlined shape as a whole. The rear surface of the case 10 has a substantially boat-shaped opening 100.
Further, grooves 101 are formed in a substantially U shape from the outer surface side to the inner surface side of each side surface at substantially right angles to the back surface at both left and right end sides of the upper and lower side surfaces inclined toward the end of the case 10, respectively. A mounting screw insertion hole 102 for mounting the case 10 (that is, the safety handle H) to the door is formed in the inner surface of the groove 101, and each groove 101 has a cap 107 that is an integral surface with each side surface. (See FIG. 1 (a)) is detachably attached by the engagement of the groove-side locking portion and the cap-side locked portion. In this case, on the opposite side of each groove 101 on the upper and lower side surfaces of the case 10, that is, on the inner surface of the case 10, as shown in FIG. 2C, a columnar shape having a substantially U-shaped cross-section is formed so as to surround each groove 101. mounting boss 103 formed are provided, these mounting bosses 103 are respectively extended to the rear opening 100 of the case 10, the mounting screw insertion holes 102 of the inner side surface case back through the mounting boss 10 3 Opened at 100. Further, as shown in FIG. 4, the groove-side engaging portion of each groove 101 has a convex portion 105 protruding to an opening edge portion of the groove 101 on the side of the mounting screw insertion hole 102 and an inner portion having a substantially U-shaped cross section. A slit 106 is formed substantially in the center of the circumferential surface in the circumferential direction from the front side to the back side of the body case 1, and the locked portion on the cap side is the mounting screw insertion portion 102 side of the groove 101 of the cap 107. Is formed in the front surface half of the end corresponding to the groove, and the convex portion 105 of the groove side locking portion can be fitted therein, and the rear surface half of the end, and the groove side engagement is formed. A locking end 111 having a convex portion 110 that can be engaged inside the convex portion 105 of the stopper portion, and a groove side locking at a position facing the front end portion of the slit 106 of the groove 101 on the back surface of the cap 107. The inner surface of the edge of the slit 106 at the tip of the slit In this case, the locking claw 113 having a claw 112 engageable with the inner surface of the edge of the front end of the slit 106, and the inner side of the locking end 111 on the rear surface of the cap 107 have a substantially U-shaped cross section inside the groove 101. It is composed of a pair of support portions 114 that are in contact with the peripheral surface and support the cap 107 on the groove 101. Accordingly, each cap 107 supports the cap 107 on the groove 101 by abutting the pair of supporting portions 114 of the cap 107 on the inner peripheral surface of the groove 101, and at the same time, the concave portion 109 and the convex portion of the locking end 111 of the cap 107. By engaging the portion 110 with the convex portion 105 of the groove 101, and inserting and pushing the locking claw 113 of the cap 107 into the slit 106 of the groove 101, the claw 112 at the tip of the locking claw 113 becomes the slit of the groove 101. The outer surface of the end edge portion of 106 is passed over and engaged with the inner surface of the end edge portion, and the engagement of the locking claw 113 and the edge portion of the slit 106 causes the surface of each cap 107 in each groove 101. The case 10 is fitted and fixed so as to be substantially flush with each side surface.
In addition, as shown in FIG. 2B, the case 10 has a circular padlock latch hole 104 at the other end of the upper and lower sides, in this case, at the right end in the vicinity of the front edge. The operation handle 3 can be locked with a padlock by inserting a padlock latch together with the operation handle 3 described later.
Further, as shown in FIG. 2C, a mounting boss 115 having a screw hole for fixing the mounting base 17 fitted in the opening 100 on the rear surface of the case 10 is also formed inside the case 10. . In this case, the mounting boss 115 is formed on the center of the inner surface of the right end surface and on the left end of the inner surface of both upper and lower surfaces.
Further, in the main body case 1, as shown in FIG. 2C, in the latch mounting portion 12, the opening 11 of the main body case 1 is provided at the middle position in the longitudinal direction of the latch 2 at the installation position of the normal latch 2. As shown in FIG. 3 (a), a substantially flat plate-shaped first spring pressing member 116 that is erected to face each other and that can press the ends of the coil springs is installed in parallel with the spring pressing member 116. And a second spring retainer member 117 having a substantially semicircular holding portion capable of retaining the periphery of the end of the coil spring. In this case, the first spring pressing member 116 is substantially flat plate-shaped and is erected on the inner surface of the front surface of the case 10 toward the back surface, and the second spring pressing member 117 is substantially flat plate-shaped and has a substantially semicircular holding portion at its tip. It is provided and is erected on the mounting base 17 toward the front of the case 10.
Further, in the main body case 1, on the left end side of the opening 13 formed from the central portion of the front surface of the case 10 to the right end surface, on the inner side surfaces on the upper and lower sides of the opening 13, respectively, as shown in FIG. Bearings 118 are formed. In this case, the bearing 118 is installed on the inner surfaces of the upper and lower sides of the opening 13 and has a recess 119 formed in a substantially U-shaped cross section having a depth substantially the same as the diameter of the handle rotating shaft 32, and installed over the recess 119. The plate 123 is fixed by a mounting screw. Further, in this case, as shown in FIG. 6, the recesses 119 are formed between the upper and lower edge portions of the opening 13 and the upper and lower side surfaces of the case 10 without piercing the respective side surfaces. From the side, a large diameter portion 120 that is slightly larger than the diameter of the handle rotating shaft 32, a medium diameter portion 122 that is substantially the same as or slightly larger than the diameter of the handle rotating shaft 32, a small diameter portion 121 that is smaller than the diameter of the handle rotating shaft 32, and a handle rotation. A medium-diameter portion 122 that is substantially the same as or slightly larger than the diameter of the shaft 32 is formed, and the small-diameter portion 121 between the medium-diameter portion 122 and the medium-diameter portion 122 serves as a projecting reinforcing portion.
On the other hand, as shown in FIG. 3, the mounting base 17 is composed of a substantially boat-shaped plate that can be fitted into the rear opening 100 of the case 10, and is attached to the case 10 to be the inner surface. The installation surface of the latch 2 is formed, and the lock plate attachment portion 18 is formed in a concave shape having substantially the same outer shape as the lock plate 8 so that the lock plate 8 can be fitted in an intermediate portion including a position facing the lock unit attachment portion 16 of the case 10. A push rod insertion portion 19 is formed in a circular shape on the right end side of the mounting base 17 so as to face the handle mounting portion 14. Further, the upper and lower sides of the mounting base 17 can be fitted with the ends of the respective mounting bosses 103 at the positions corresponding to the respective mounting bosses 103 formed on the inner surface of the case 10 of the respective grooves 101 of the case 10. Substantially U-shaped cutouts 124 are formed, and mounting screw insertion holes 125 are formed through the upper and lower side portions and the right end portion at positions facing the respective mounting bosses 115 formed on the inner surface of the case 10.
In this manner, the main body case 1 is assembled with the latch 2, each member constituting the latch drive mechanism D, which will be described later, the operation handle 3, and the push rod 4, and the attachment base 17 is attached to the opening 100 on the back surface of the case 10. In this case, the mounting base 17 is fitted into the opening 100 on the rear surface of the case 10 by fitting the respective mounting bosses 103 on the inner surface of the case 10 into the respective notches 124, and the mounting screw s1 is inserted into the respective mounting screw insertion holes of the mounting base 17. It is inserted through 125, is fastened to the screw holes of each mounting boss 115 on the inner surface of the case 10, and is fixed to the back surface of the case 10.

In FIG. 1, the latch 2 is formed of polyacetal resin and stainless steel, has a claw portion 22 at one end, in this case, the left end, and has a locking groove 23 on the other end side of the back surface, in this case, the right end side of the back surface. And is arranged in the latch mounting portion 12 so as to be able to move forward and backward in both end directions of the main body case 1, and is normally urged toward the opening 11 of the latch mounting portion 12 by the spring member so that the claw portion 22 is opened. 11 is projected.
In this case, as shown in FIG. 8, the latch 2 is made of stainless steel, and is composed of a pair of frames 21 which are connected at the left end side thereof with a C-shaped cross section and are connected to each other, and form the outer shape of the entire latch 2. The main body portion 20 and the polyacetal resin, which are fitted and fixed in the U-shaped cross-section on the left end side of each frame 21 of the main body portion 20, are formed of stainless steel, and the pawl member 221 forming the pawl portion 22 of the latch 2. The main body 20 is provided between the other ends of the respective frames 21, and is constituted by a hook 31 of the operation handle 3 and a latch shaft 24 forming the right end of the latch 2 engaged with the locking portion 52 of the operating lever 5.
Each of the pair of frames 21 forming the main body portion 20 has one end formed in a blade shape of a knife, a protrusion 211 on the inner surface at the left end, a convex portion 212 cut out for crimping on the rear side edge portion at the left end, and a right end portion. Between the latch shaft insertion hole 213, a pair of upper and lower side surface frames 21a having a locking groove 23 on the right side rear side edge portion, and between the upper and lower side surface frames 21a in a predetermined range from the left end of the upper and lower side surface frames 21a. The upper and lower side surface frames 21a are connected to each other, and the intermediate frame 21b has a protruding piece 214 cut and raised for caulking at a position slightly left of the caulking convex portion 212 described above. . The claw member 221 is formed of polyacetal resin, and has a cross-section knife blade shape that can be fitted in a range surrounded by the upper and lower side surface frames 21a and the intermediate frame 21b from the left end of the pair of frames 21 to the caulking protruding piece 214. A block 215, which is engageable with the left end of the intermediate frame 21b of the main body portion 20 at the left end of the front surface, grooves 216 engageable with the respective protrusions 211 of the main body portion 20 on the upper and lower side surfaces, Grooves 217 engageable with the respective crimping convex portions 212 of the main body portion 20 on both the upper and lower edges on the right end side, and the end of the coil spring on the right end surface (the surface of the pawl member 221 facing toward the other end of the latch 2). A circular recess 218 into which the parts can be fitted and a recess 219 that can be engaged with the caulking projection 214 of the main body 20 are further provided on the bottom surface of the recess 218. The latch shaft 24 is a pin made of stainless steel.
In the latch 2, the claw member 221 is fitted into the left end side of the main body part 20 by engaging the respective protrusions 211 of the main body part 20 and the respective grooves 216 of the claw member 221, and is used for caulking the upper and lower side surface frames 21a. The respective convex portions 212 and the protruding pieces 214 of the intermediate frame 21b are fixed by being caulked in the respective grooves 217 and the concave portions 219 of the claw members 221, and the latch shaft 24 is provided between the latch shaft insertion holes 213 at the right end of the main body portion 20. Both ends of the latch shaft 24 are crimped and rotatably bridged.
Thus, as shown in FIG. 1, the latch 2 is installed in the latch mounting portion 12 so as to be capable of advancing and retreating in the left and right end directions of the body case 1, and as a spring member of the latch 2, a coil spring 25L having a large diameter and a coil having a small diameter are used. The double coil spring 25 in which the spring 25S is incorporated is fitted at the left end into the recess 218 of the claw member 221, and the right end is surrounded by the first spring pressing member 116 of the latch mounting portion 12 so that the periphery of the left end is latched. The second coil spring 25 is pressed by the second spring pressing member 117 and is disposed between the claw member 221 and the first spring pressing member 116. The double coil spring 25 normally serves as the opening of the latch mounting portion 12. By being biased toward 11, the claw portion 22 is projected from the opening 11.

In FIG. 1, the operation handle 3 is made of an aluminum alloy, and has a hook 31 (see FIG. 9) and an actuating lever housing on one end side of the back surface, in this case, on the end side (left end side in the drawing) on the pivot side. The left end side is connected to the handle mounting portion 14 via the handle rotating shaft 32 so that the hook 31 and the latch shaft 24 of the latch 2 can be engaged with each other, and the hook 31 and the latch shaft 24 are undulated in the opening 13 of the handle mounting portion 14. The hook 31 is mounted so that it can be rotated from the handle mounting portion 14 in the upright direction to rotate the hook 31 toward the right end of the handle mounting portion 14 to drive the latch 2 backward.
In this case, as shown in FIG. 9, the operation handle 3 has a handle lever 3a whose left end portion can be fitted into the opening 13 of the handle attachment portion 14, and the handle attachment portion 14 which is continuous with the right end portion of the handle lever 3a. The handle grip 3b extends from the opening 13 to the outside, and the front faces of the handle lever 3a and the handle grip 3b are integrally curved with the front face of the case 10. Further, the back surface of the handle lever 3a is formed in a groove shape by protruding both upper and lower side pieces 311 along the upper and lower side edges in a flat plate shape. The upper and lower both side pieces 311 are a small piece portion 311S having a small protruding length from the left end to the vicinity of the pivot portion, and a substantially rectangular large piece portion 311L having a large protruding length on the right end side. A shaft insertion portion 310 for inserting the handle rotation shaft 32 is formed in each small piece portion 311S.
The hook 31 is formed at the left end of the rear surface of the operation handle 3 in the widthwise center, that is, between the small piece portions 311S of the upper and lower pieces, and protrudes substantially like a hook. The operation lever storage portion 30 of the operation handle 3 has the left end of the rear surface of the operation handle 3. The actuating levers 5 are formed in groove shapes on the upper and lower sides of the hook 31 so that they can be fitted, that is, between the hook 31 and the small piece portions 311S of the upper and lower side pieces 311. In addition, the shaft insertion portion 310 for passing the handle rotation shaft 32 is provided at a position serving as a rotation center of the hook 31 in each small piece portion 311S.
Further, the other end of the handle lever 3a of the operation handle 3, in this case, the right end, is formed at the right end of the upper and lower side surfaces of the case 10 at a position close to the edge on the front side. A hole 33 that communicates with is circularly formed, and with the operation handle 3 lying down in the opening 13 of the handle mounting portion 14, these holes 104 and 33 are communicated with each other so that a padlock latch can be inserted. There is. Thereby, the operation handle 3 can be locked with a padlock.
In the operation handle 3, however, the operation lever 5 described later is stored in the operation lever storage portion 30, and the hook 31 is penetrated together with the operation lever 5 between the small piece portions 311S of the upper and lower left side pieces 311 on the left end side and the handle rotation shaft 32. (See FIG. 1), and as shown in FIG. 7, the handle rotation shaft 32 is supported by bearings 118 formed on the inner side surfaces on both sides of the opening 13 on the left end side of the opening 13 in the front of the main body case 1. Then, the main body case 1 is mounted in the opening 13. In this case, as shown in FIG. 6, the handle rotating shaft 32 has small-diameter portions 321 on both end sides, and the both end sides are inserted into the substantially U-shaped recess 119 of the bearing 118, so that the small-diameter portion 321 on both end sides is inserted. The inner portion is fitted into the large diameter portion 120 and the medium diameter portion 122 of the recess 119, the small diameter portion 321 is engaged with the small diameter portion 121, that is, the protruding reinforcing portion 121, and the outer portion of the small diameter portion 321 is the middle diameter. The part 122 is fitted. Then, in this state, as shown in FIG. 7, the plate 123 is installed so as to straddle the recess 119 and is fixed by the mounting screw.

In FIG. 1, the operating lever 5 forming a part of the latch drive mechanism D is formed of stainless steel and has a locking portion 52 at one end, in this case, the left end, and the locking portion 52 and the latch shaft 24 of the latch 2. Is rotatably attached to the handle rotation shaft 32 of the handle mounting portion 14, the left end side is detachably stored in the operation lever storage portion 30 of the operation handle 3, and the right end extends to the push rod insertion portion 19. By rotating the operation handle 3 in the upright direction, the locking portion 52 together with the hook 31 of the operation handle 3 is rotated toward the right end of the handle mounting portion 14 to drive the latch 2 backward, and the rear side of the body case 1 is moved to the right end. When the latching portion 52 is detached from the actuating lever storage portion 30 toward the right end of the handle mounting portion 14 in response to a pressing force in the front direction, the latch 2 is driven backwards independently of the hook 31 of the operation handle 3. To.
In this case, as shown in FIG. 10, the operating lever 5 is composed of a pair of lever members 51, each lever member 51 is formed in a generally V-shape, and a locking portion 52 is provided at the left end of the operating handle 3. It is formed in the same shape as 31. Then, a shaft insertion portion 50 for passing the handle rotation shaft 32 is provided at a position which is the rotation center of the locking portion 52 at the left end of each lever member 51. The operating lever 5 has a shaft 53 for mounting the reset lever 6 in parallel with the handle rotating shaft 32 between the positions of the lever mounting members 14 on the right end side of the handle rotating shaft 32 in the middle of the lever members 51. Erected.
Therefore, as shown in FIG. 1, the operating lever 5 is housed by inserting the left end side of each lever member 51 into the operating lever housing portion 30 of the operating handle 3 and storing the operating handle 3 in the shaft inserting portion 50 as described above. The handle rotating shaft 32 is inserted through the push rod inserting portion 19 of the mounting base 17 along the inside of each small piece 311S of the upper and lower pieces 311 on the rear surface of the handle lever 3a of the operation handle 3 (see FIG. 9). Be postponed. As a result, the operating lever 5 is reinforced by the hook 31 of the operation handle 3 and is mounted in the operating lever housing portion 30 without rattling.

In FIG. 1, the lock plate 8 forming a part of the latch drive mechanism D is made of stainless steel, and the lock plate mounting portion 18 of the mounting base 17 has the lock plate mounting portion 18 and the locking groove 23 on the back surface of the latch 2. It is mounted so as to be tiltable between the two, and is normally engaged with the locking groove 23 of the latch 2 by the spring means 54 to restrict the backward movement of the latch 2.
In this case, as shown in FIG. 11, the lock plate 8 has a rectangular fixed portion 81 having a flat plate shape as a whole and a mounting screw insertion hole 80 at the right end, and extends obliquely to the left from the fixed portion 81 in the front direction. The movable portion 82 has a projecting portion 821 that vertically protrudes to the left end side, and a pressure receiving portion 84 that extends to the left side of the movable portion 82 via a bent portion 83 in the front direction. The pressure receiving portion 84 is the movable portion 82.
The guide piece 841 is formed in a substantially pentagonal shape smaller than the above, and extends obliquely in the back direction at the upper oblique edge.
Then, as shown in FIG. 1, the lock plate 8 is installed in the lock plate mounting portion 18, and the coil spring 85 is interposed as a spring means between the pressure receiving portion 84 and the lock plate mounting portion 18, and the fixing portion 81. Is fixed by a mounting screw, the upper and lower protruding portions 821 (see FIG. 11) of the movable portion 82 are engaged with the locking grooves 23 of the latch 2 in the main body case 1, and the pressure receiving portion 84 (see FIG. 11) is formed. It is arranged to face the lock unit mounting portion 16.

In FIG. 1, the lock unit 7 forming a part of the latch drive mechanism D is inserted into the lock unit mounting portion 16 to expose a key hole 70 in the opening 15 in the front of the main body case 1, and a key K to be inserted into the key hole 70. The lock cam 72 is connected to the tip of the rotor 71 of the lock unit 7 in a form of rotating the rotor 71 by the operation of the lock unit 7 and the lock cam 72 presses the lock plate 8 against the lock plate mounting portion 18 by the unlocking operation of the lock unit 7. Then, the lock plate 8 and the locking groove 12 of the latch 2 are disengaged from each other, and the locking operation of the lock unit 7 releases the pressure engagement of the lock cam 72 to the lock plate 8 so that the lock plate 8 is coiled. The latching groove 23 of the latch 2 is engaged by the biasing force of the spring 85.
In this case, the lock unit 7 is a so-called cylinder lock. As shown in FIG. 12, the lock cam 72 has a cylindrical portion 721 having a mounting screw insertion hole at one end, in this case, an end portion facing the front side, and the other end edge portion of the cylindrical portion 721, in this case, on the back side. An arcuate cam portion 722 that extends in a circular arc shape from a part of the directed edge portion and one side edge portion, in this case, a side edge portion corresponding to the guide piece 841 of the lock plate 8 is formed in a spiral shape. Become. In this lock cam 72, the cylindrical portion 721 is concentrically arranged at the end of the rotor 71 of the lock unit 7, and is fixed by a mounting screw that is passed through the mounting screw insertion hole.
As shown in FIG. 1, the lock unit 7 is inserted and fixed in the lock unit mounting portion 16 so that the key hole 70 is exposed on the front surface of the main body case 1, and the lock cam 72 is located inside the main body case 1. The arcuate cam portion 722 is arranged to face the lock plate 8 so as to be engageable between the edge portion of the guide piece 841 of the lock plate 8 and the pressure receiving portion 84.

In FIG. 1, the reset lever 6 which is a part of the latch drive mechanism D is formed of stainless steel, and has a pressing portion 611 at one end, in this case, the left end, and a pressing operation portion 612 at the other end, in this case, the right end. And is rotatably attached at an intermediate portion of the operating lever 5 to the right end side of the operating lever 5 with respect to the handle rotating shaft 32 of the handle mounting portion 14 via a shaft 53 arranged in parallel with the handle rotating shaft 32. Then, the pressing portion 611 is arranged on the lock plate 8, the pressing operating portion 612 is arranged between the push rod insertion portion 19 and the right end of the operating lever 5, and the rear surface of the main body case 1 is attached to the pressing operating portion 612 at the right end. In response to the pressing force from the side in the front direction, the pressing operation part 612 presses and rotates the right end of the operation lever 5, and the pressing part 611 presses and tilts the lock plate 8 to the lock plate mounting part 18. .
In this case, the reset lever 6 is formed by stacking a pair of lever members 61. The entire lever member 61 is formed in a substantially V shape, the pressing portion 611 is formed in a substantially natter shape, and the pressing operation portion 612 is formed in a substantially wing shape, and protrudes in the vertical direction. Then, a shaft insertion portion 613 for inserting the shaft 53 is formed at a position serving as a rotation center of the reset lever 6 at an edge portion on the front side of the intermediate portion of each lever member 61.
Therefore, as shown in FIG. 1, the reset lever 6 is arranged between the upper and lower side pieces 311 (see FIG. 9) on the rear surface of the handle lever 3a of the operation handle 3 and is actuated by the shaft insertion portion 613 of each lever member 61. A shaft 53 that extends in parallel with the handle rotation shaft 32 is inserted between the intermediate portions of the lever members 51 of the lever 5, and the pressing operation portion 612 allows the right end of the operation lever 5 to be pressed and rotated. The lock plate 8 is attached to the lock plate attachment portion 18 so as to be capable of being pushed and tilted. Since the operating lever 5 is housed in the operating lever housing portion 30 of the operation handle 3, it is possible to secure a sufficient space for disposing the reset lever 6 on the rear surface of the operation handle 3, and thus the reset lever 6 is The thickness can be increased and can be reinforced, and it can be attached to the shaft 53 of the operating lever 5 via the spacer ring without rattling, and the operation handle 3, the operating lever 5, and the reset lever 6 can have a simple structure. You can

As shown in FIG. 14, the push rod 4 is inserted into the push rod insertion portion 19 from the back side of the door D through the door D, and the push operating portion 612 of the reset lever 6 is incorporated so as to be able to push from the back side of the main body case 1 to the front direction. Be done.
In this case, the push rod 4 includes a shaft 41 and a push knob 42 detachably attached to the base end of the shaft 41. The shaft 41 passes through a push rod insertion portion D0 formed from the back side to the front side of the door D, the distal end is disposed in the push rod insertion portion 19 of the mounting base 17, and the base end side is a stroke required for the operation of the latch drive mechanism D. The predetermined length that has been secured is projected into the storage F, and the pressing knob 42 is arranged in the storage F.
Then, when the push rod 4 pushes the push knob 42 in the storage F to move the shaft 41 toward the outside of the door D by a predetermined stroke, the tip of the shaft 41 pushes the push operating portion 612 of the reset lever 6, and the push operation is performed. The operating portion 612 is configured to press and rotate the right end of the operating lever 5, and the pressing portion 611 is configured to press and tilt the lock plate 8 to the lock plate mounting portion 18.

  In this way, the safety handle H prevents the operation handle 3 outside the refrigerator from resisting the biasing force of the coil spring 25 while the lock unit 8 releases the engagement between the lock plate 8 and the locking groove 23 of the latch 2. Then, the latch 2 is driven backward by the hook 31 of the operation handle 3 and the locking portion 52 of the actuating lever 5 by rotating in the upright direction, and the latch 2 is disengaged from the receiving portion B and locked by the lock unit 7. Even when the plate 8 and the locking groove 23 of the latch 2 are engaged, the reset lever 6 releases the engagement of the lock plate 8 and the locking groove 23 of the latch 2 by pressing the push rod 4 in the refrigerator. At the same time, the operating lever 5 is rotated away from the operating lever housing portion 30 of the operation handle 3, and the latch 2 of the operating lever 5 drives the latch 2 backward.

FIG. 14 shows an example of how the safety handle H is attached to the door D.
As shown in FIG. 14, a receiving portion B having a substantially L-shaped cross section is fixed to a predetermined position at one side edge portion of the inlet / outlet opening F0 on the front of the storage F, and the safety handle H is The latch 2 is attached to the receiving portion B so as to be engaged with the receiving portion B at a predetermined position on the front end of the door D that opens and closes the loading / unloading opening F0.
In this case, first, the cap 107 is removed from the grooves 101 on the upper and lower side surfaces of the main body case 1, and the push rod 4 is pulled out from the mounting base 17 (see FIG. 1). When removing the cap 107, insert the tip of a flat-blade screwdriver between the locking end 111 of the cap 107 and the convex portion 105 of the groove 101, and lift the cap 107 with this tip to move the cap 107 into the groove 101. Can be easily removed (see Figure 4). Subsequently, the attachment base 17 is brought into contact with the latch 2 toward the receiving portion B at a predetermined position of the door D, the push rod insertion hole D0 of the door D and the push rod insertion portion 19 of the attachment base 17 are aligned, and the door D of the door D is attached. The push rod 4 is passed through the push rod insertion hole D0 from the back side, and the tip of the push rod 4 is arranged in the push rod insertion portion 19 of the mounting base 17. Next, the mounting screws are passed through the respective mounting screw insertion holes 102 that are exposed to the outside from the respective grooves 101 on the upper and lower sides of the body case 1, and the mounting screws are tightened and fixed to the screw fastening portions on the door D side (FIG. 1). reference). As a result, the latch 2 that normally projects from the left end opening 11 of the main body case 1 is engaged with the receiving portion B on the storage F side. Then, the cap 107 is mounted in each groove 101 of the main body case 1 by the engagement between the groove-side locking portion and the cap-side locked portion. In this case, the pair of supporting portions 114 on the back surface of the cap 107 are brought into contact with the inner peripheral surface of the groove 101 to support the groove 101, and the concave portion 109 and the convex portion 110 of the locking end 111 of the cap 107 and the convex portion of the groove 101 are supported. By engaging with the groove portion 105 and inserting the locking claw 113 of the cap 107 into the slit 106 of the groove 101 and pushing the same, the claw 112 at the tip of the locking claw 113 of the end edge of the slit 106 of the groove 101 is inserted. It rides over the outer surface and engages the inner surface of this edge (see FIG. 4). As a result, the grooves 101 of the body case 1 do not appear on the upper and lower side surfaces of the body case 1 together with the mounting screws. Further, since the handle rotating shaft 32 of the operation handle 3 is supported by the bearing 118 inside the case 10, the handle rotating shaft 32 is not exposed on both side surfaces of the main body case 1. Moreover, the main body case 1 has a substantially isosceles trapezoidal basic shape in a cross section perpendicular to the advancing / retreating direction of the latch 2 of the case 10, and both upper and lower side surfaces are divergent from the front side to the rear side, and the front side is wide. A curved surface is formed between each of the surrounding surfaces and each of the surrounding surfaces of the front surface, and further, the left end side of each of the upper and lower side surfaces is tapered so as to gradually narrow toward the left end surface. Since the operation handle 3 is substantially streamlined as a whole and is integrally fitted to the front surface of the streamlined main body case 1, the design effect of the whole is excellent, and the main body case 1 Dust is hard to collect on the surface of the, and even when it is wiped and cleaned, there are very few obstacles and it is easy to clean.

15 to 19 show specific examples of use of this safety handle.
As shown in FIG. 15, the access port F0 of the storage F is normally closed by the door D, and this state is held by the safety handle H. That is, the latch 2 is normally urged by the spring member 25 toward the opening 11 of the latch mounting portion 112, and the claw portion 22 at the left end of the latch 2 is projected from the opening 11 and engaged with the receiving portion B. . In this case, since the spring member 25 is a double coil spring, a sufficient biasing force can be obtained and the latch 2 and the receiving portion B can be reliably and stably engaged. Then, in this state, the lock plate 8 of the lock plate mounting portion 18 in the main body case 1 is tilted in the latch 2 direction from the lock plate mounting portion 18 by the biasing force of the spring means 85 and engages with the locking groove 23 of the latch 2. When the lock unit 7 is locked, only the arcuate cam portion 722 of the lock cam 72 comes into contact with the edge portion of the guide piece 841 of the lock plate 8 to lock the latch 2 by restricting the backward drive. The engagement between and the receiving portion B is maintained. That is, the operation handle 3 is pulled up from the handle mounting portion 14 of the main body case 1 and rotated to rotate the hook 31 engaged with the latch shaft 24 of the latch 2 together with the locking portion 52 of the operating lever 5, Even if the latch 2 is to be retracted toward the right end of the latch mounting portion 12, the lock plate 8 is engaged with the locking groove 23 of the latch 2 and the movement of the latch 2 in the backward direction is restricted. The engagement with the receiving portion B cannot be released. Therefore, the door D cannot be opened unless the lock of the lock control unit 7 is unlocked by the key.
As described above, the safety case H is provided at the right end of the upper and lower side surfaces of the case 10 close to the front edge and at the right end of the handle lever 3a of the operation handle 3 for latching a padlock. Holes are formed in a circular shape, and these holes are communicated with each other in a state in which the operation handle 3 is laid down in the opening 13 of the handle mounting portion 14, so that a padlock latch can be passed through these holes to lock. You can
Then, since the door F0 of the storage F is opened, when the door D is opened, the key K is inserted into the key hole 70 of the lock unit 7 and the rotor 71 is turned in the unlocking direction as shown in FIG. The arcuate cam portion 722 of the lock cam 72 is rotated from the guide piece 841 at the tip of the lock plate 8 toward the pressure receiving portion 84 to press and engage the pressure receiving portion 84, and the entire lock plate 8 is attached to the lock plate mounting portion 18. It is pushed and tilted to be disengaged from the locking groove 23 on the back surface of the latch 2. This releases the restriction on the backward drive of the latch 2. Then, as shown in FIG. 17, by pulling up and rotating the operation handle 3 from the handle mounting portion 14 of the main body case 1, the hook 31 of the operation handle 3 engaged with the latch shaft 24 and the operation lever 5 are engaged. Both the locking portions 52 are rotated toward the right end of the handle mounting portion 14, the latch 2 is driven backward by the latch mounting portion 12, and the engagement between the latch 2 and the receiving portion B is released. As it is, the operation handle 3 is used to pull the door D to open the access port F0 of the storage F. The operation of the latch drive mechanism D by the series of operations of the operation handle 3 is surely and smoothly performed by the reinforcement of the operation lever 5 and the reliable attachment without rattling. Further, when the operation handle 3 is operated, even if a load is applied to the handle rotation shaft 32 and a force for expanding the main body case 1 to the bearing 118 is applied, each small diameter portion 121 of the bearing 118 and the handle rotation shaft 32. Engagement of 32 with the projecting reinforcing portion 321 (see FIG. 6) reduces the force and protects the main body case 1.
When closing the door D, on the contrary, the door D is pushed by using the operation handle 3 to close the loading / unloading port F0 of the storage F, and the operation handle 3 is rotated by the urging force of the spring member 25. By returning to the mounting portion 14, both the hook 31 of the operation handle 3 and the locking portion of the operating lever 5 are rotated toward the left end direction of the handle mounting portion 14, so that the latch 2 is driven forward by the latch mounting portion 12 and the latch 2 is latched. 2 and the receiving part B are engaged. Then, by rotating the key of the lock unit 7 in the locking direction, the arcuate cam portion 722 of the lock cam 72 is rotated from the pressure receiving portion 84 at the tip of the lock plate 8 toward the guide piece 841 to press and engage the pressure receiving portion 84. While unlocking, the entire lock plate 8 is pushed and tilted from the lock plate mounting portion 18 toward the latch 2 by the spring means 85, and is engaged with the locking groove 23 on the back surface of the latch 2. As a result, the backward drive of the latch 2 is restricted and the latch 2 is locked.
Further, since the worker enters and exits the storage F through the access port F0 and stores the stored items, if the door D is closed and locked while the worker is working in the storage F, It is sufficient to push the push rod 4 inside. That is, as shown in FIGS. 18 and 19, when the push knob 42 of the push rod 4 arranged in the refrigerator is pushed to push the push rod 4 toward the outside of the refrigerator by a predetermined stroke, the tip of the shaft 41 in the body case 1. Presses the pressing operation part 612 of the reset lever 6 to rotate the reset lever 6 to the operation lever 5 side, and the pressing part 611 of the reset lever 6 presses and tilts the lock plate 8 to the lock plate mounting part 18 and resets. The pressing operation portion 612 of the lever 6 presses and rotates the right end of the operation lever 5. As a result, while the lock unit 7 remains in the locked state, the lock plate 8 is pushed and tilted by the lock plate mounting portion 18 to be disengaged from the locking groove 23 on the back surface of the latch 2, and the restriction of the backward drive of the latch 2 is released. It At the same time, the operating lever 5 engaged with the latch shaft 24 is detached from the operating lever housing portion 30 of the operating handle 3 toward the right end of the handle mounting portion 14 in a state where the operating handle 3 is laid down in the handle mounting portion 14. When the latch 2 is moved, the latch 2 is driven backward by the latch mounting portion 12, and the engagement between the latch 2 and the receiving portion B is released. If the door D is pushed by using the push knob 42 of the push rod 4 as it is, the door D is opened and the loading / unloading port F0 of the storage F is opened. The operation of the latch drive mechanism D by the operation of the push rod 4 is reliably and smoothly performed by the reinforcement of the operation lever 5 and the reset lever 6 and the reliable attachment without rattling. Therefore, the worker can safely escape from the storage F.

As described above, according to this safety handle H, it is attached to the left end side of the main body case 1, the claw portion 22 is arranged so as to be retractable from the opening 11 on the left end surface of the main body case 1, and the operation inside the main body case 1 is performed. A latch 2 that is operatively connected to a latch drive mechanism D including a lever 5, a reset lever 6, a lock unit 7, and a lock plate 8, and an opening 13 formed on the right end side of the main body case 1 from the middle portion of the front surface to the left end surface. An operation handle 3 which is rotatably mounted via a handle rotation shaft 32 and is operatively connected to a latch drive mechanism D in the main body case 1, and a mounting base 17 on the rear surface of the main body case 1 which faces the opening 13 on the front surface. And a push rod 4 that is operatively connected to the latch drive mechanism D in the main body case 1 and that is inserted into the push rod insertion portion 19 that is formed. By rotating the operation handle 3 outside the refrigerator in the upright direction, the latch 2 is driven backward by the hook 31 of the operation handle 3 and the locking portion 52 of the operating lever 5 to be disengaged from the receiving portion B, Even when the lock unit 7 is locked by pushing the push rod 4 in the refrigerator, the engagement between the lock plate 8 and the locking groove 23 of the latch 2 is released via the reset lever 6, and the operating lever 5 is operated. Since the latch 2 of the storage lever F is rotated away from the operation lever storage portion 30 and the latch 2 is driven backward by the locking portion 52 of the operation lever 5, the door D of the storage F can be opened and closed normally. In addition, the closed door D can be opened in the storage F in the locked state, and when the worker is trapped in the storage F, the operator can safely escape from the storage F.
Further, in this safety handle H, in particular, the operating lever 5 has the engaging portion 52 at the left end, is rotatably attached to the handle rotating shaft 32 of the handle mounting portion 14, and the operating handle 3 is operated at the left end side. It is detachably accommodated in the lever accommodating portion 30, the right end is extended to the push rod insertion portion 19, and the hook 31 of the operation handle 3 as well as the locking portion 52 of the handle attachment portion 14 is rotated by the operation of rotating the operation handle 3 in the upright direction. When the latch 2 is rotated backward to drive the latch 2 backward, and the right end of the actuating lever 5 is pressed from the back side of the main body case 1 in the front direction, the locking portion 52 is moved from the actuating lever storage portion 30. The handle mounting portion 14 is disengaged and rotated toward the right end to drive the latch 2 backwards independently of the hook 31 of the operation handle 3, and the reset lever 6 is pressed to the left end. 611 and a pressing operation portion 612 at the right end, and is arranged in the middle portion of the operation lever 5 on the right end side of the operation lever 5 with respect to the handle rotation shaft 32 of the handle mounting portion 14 in parallel with the handle rotation shaft 32. It is rotatably attached via the shaft 53, and the pressing portion 611 is arranged on the lock plate 8 and the pressing operating portion 612 is arranged between the push rod insertion portion 19 and the right end of the operating lever 5, and When the operating portion 612 receives a pressure in the front direction from the back side of the body case 1, the pressing operating portion 612 presses and rotates the right end of the operating lever 5, and the pressing portion 6122 moves the lock plate 8 to the lock plate mounting portion 18. Since the operating lever 5 is housed in the operating lever housing portion 30 of the operating handle 3 and is normally driven together with the hook 31 of the operating handle 3, the operating lever 5 is pushed and tilted. The operating lever 5 can be reinforced by the hooks 31 of the operation handle 3 and can be installed in the operating lever housing portion 30 without rattling, and the operating lever 5 can be installed in the operating lever housing portion 30 of the operating handle 3. By being stored, a sufficient space for disposing the reset lever 6 on the rear surface of the operation handle 3 can be ensured, whereby the reset lever 6 can be increased in thickness and reinforced, and the axis of the operation lever 5 can be increased. It can be attached to 53 via a spacer ring without rattling, and a simple structure can be provided between the operation handle 3, the operating lever 5, and the reset lever 6. With such a structure, the forward / backward drive of the latch 2 by the turning operation of the operation handle 3 and the pushing operation of the push rod 4 can be reliably and smoothly performed.

Further, the safety handle H has the following advantages.
(1) The hook 31 of the operation handle 3 is formed in the widthwise center at the left end of the back surface of the operation handle 3, and the operation lever housing portion 30 of the operation handle 3 has the operation levers on both sides of the hook 31 at the left end of the operation handle 3 back surface. Since the operation lever 5 is formed in a groove shape into which the operation lever 5 is formed, and the operation lever 5 includes a pair of lever members 51 and is housed in the operation lever housing portion 30, the operation lever 5 is fixed by the hook 31 of the operation handle 3. The operation lever 5 can be sufficiently reinforced, and the operation lever 5 can be easily and surely mounted in the operation lever housing portion 30 without rattling.
(2) The hook 31 of the operation handle 3 is formed in a substantially hook shape, and the operating lever 5 is formed in a substantially V shape as a whole, and the locking portion 52 is substantially the same hook shape as the hook 31 of the operation handle 3. The reset lever 6 is formed in a generally V shape, the pressing portion 611 is formed in a substantially natter shape, and the pressing operation portion 612 is formed in a substantially wing shape, so that the operation lever 5 is operated. The reset lever 6 can be more easily and surely mounted in the lever housing portion 30 without rattling, and the reset lever 6 can be mounted to the operating lever 5 in the same row as the back surface of the operation handle 3 more easily and securely without rattling. be able to.
(3) The latch mounting portion 12 of the main body case 1 is erected upright in the middle of the latch 2 in the longitudinal direction at the installation position of the latch 2 so as to face the opening 11 of the main body case 1, and the end portion of the coil spring. The first spring pressing member 116 having a substantially flat plate shape capable of pressing the spring, and the holding portion having a substantially semicircular shape that is arranged in parallel near the spring pressing member 116 and can press the periphery of the end side of the coil spring. The latch 2 has a second spring pressing member 117, and the latch 2 is composed of a pair of frames 21 formed on the left end side in a U-shaped cross section and connected to each other. The operation handle is installed between the claw member 221 which is fixed to the left end side of each frame 21 of the main body 20 on the left side of the frame 21 and forms the claw 22 of the latch 2 and the right end of each frame 21 of the main body 20. 3, hook 31, actuation The latch shaft 24 that forms the other end of the latch 2 that is engaged with the locking portion 52 of the bar 5 is provided, and the end of the coil spring can be fitted to the surface of the pawl member 221 that faces the right end of the latch 2. A recess 218 is formed, the latch 2 is installed in the latch mounting portion 12, and a double coil spring 25 in which a small diameter coil spring 25S is incorporated into a large diameter coil spring 25L as a spring member of the latch 2 has one end. The right end is fitted into the recess 218 of the claw member 221, and the right end is pressed by the first spring pressing member 116 in the latch mounting portion 12, and the periphery of the right end is pressed by the second spring pressing member 117, so that the claw member 221 and the first Since the double coil spring 25 is disposed between the latch 2 and the latch mounting portion 12, it is possible to stably install the double coil spring 25 on the same axis as the latch 2. Come, can protrude by a sufficient biasing force to the latch 2 to the outside of the latch mounting portion 12.

  Further, according to the safety handle H, the main body case 1 has a substantially isosceles trapezoidal basic shape in a cross section perpendicular to the advancing / retreating direction of the latch 2, and the both side surfaces are diverged toward the rear side from the front side. Further, since the front surface and each surface around the front surface and the respective surfaces around the front surface are formed in a curved shape to have a substantially streamlined shape as a whole, the design of the body case 1 can be improved. In addition, dust is unlikely to collect on the surface of the main body case 1, and cleaning can be facilitated.

Further, the safety handle H has the following advantages.
(1) A substantially U-shaped groove 101 is formed on each of both end sides of the divergent side of the main body case 1 at a right angle to the back surface, and a mounting screw insertion hole 102 is formed on the inner surface of each groove 101. Since the cap 107 that is provided and forms an integral surface with each side surface in each groove 101 is detachably mounted by the engagement of the groove-side locking portion and the cap-side locked portion, the conventional configuration By eliminating the wing-shaped mounting part and exposing the mounting screw from the surface of the main body case 1, the design of the main body case 1 can be improved, and dust can be prevented from adhering to the mounting screw. It is possible to make it easier to clean by making it difficult to collect dust on the surface of the main body case 1 and usually wiping the main body case 1 together with the cap 107.
Further, in this case, the groove-side locking portion is formed in the main body case at a substantially central portion of the inner peripheral surface having a substantially U-shaped cross section and the convex portion 105 protruding to the opening edge portion of the groove 101 on the side of the mounting screw insertion portion 102. 1 has a slit 106 formed from the front side to the back side, and the locked portion on the cap side is on the front surface side of the end portion of the groove 101 of the cap 107 corresponding to the mounting screw insertion portion 102 side. The recessed portion 109 is formed so that the convex portion 105 of the groove-side engaging portion can be fitted therein, and is formed on the back surface side of the end portion, and can be engaged with the inside of the convex portion 105 of the groove-side engaging portion. Locking end 111 composed of a convex portion 110 and a claw projectingly provided in the center of the back surface of the cap 107 so as to be inserted into the slit 106 of the locking portion on the groove side and engageable with the inner surface of the edge portion of the slit 106 at the tip. The locking claw 113 having the groove 112 and the groove 10 on the side of the locking end 111 on the back surface of the cap 107. Has a supporting portion 114 for supporting the cap 107 on the groove 101, and the supporting portion 114 on the back surface of the cap 107 is brought into contact with the inner peripheral surface of the groove 101. Supported on the groove 101 by engaging the concave portion 109 and the convex portion 110 of the locking end 111 of the cap 107 with the convex portion 105 of the groove 101, and the locking claw 113 of the cap 107 to the slit 106 of the groove 101. By inserting and pushing, the claw 112 at the tip of the locking claw 113 rides over the outer surface of the end edge portion of the slit 106 of the groove 101 and engages with the inner surface of this end edge portion, whereby the cap 107 is grooved. Since it is attached to 101, the cap 107 can be attached with one touch. On the contrary, by inserting the tip of a minus driver between the locking end 111 of the cap 107 and the convex portion 105 of the groove 101 and lifting the cap 107 with this tip, the cap 107 can be easily removed from the groove 11. You can
(2) In the operation handle H, the handle rotation shaft 32 is passed on the left end side, and the handle rotation shaft 32 is on the left end side of the opening 13 formed from the central portion of the front surface of the main body case 1 to the right end and on both sides of the opening 13. A bearing 118 including a recess 119 formed in a substantially U-shaped cross section having a depth substantially the same as the diameter of the handle rotating shaft 32 on the inner surface, and a plate 123 installed over the recess 119 and fixed by a mounting screw. Since the handle rotation shaft 32 is mounted on the opening 13 of the main body case 1 and is not exposed on both side surfaces of the main body case 1, the design of the main body case 1 can be improved. At the same time, dust is unlikely to collect on the surface of the main body case 1, and cleaning can be facilitated.
Further, in this case, the handle rotating shaft 32 has the small diameter portions 321 on both ends thereof, and the bearing 118 has the concave portions 119 between the upper and lower edge portions of the opening 13 and the upper and lower side surfaces of the case 10. A large-diameter portion 120 that is formed without punching the side surface and that is slightly larger than the diameter of the handle rotation shaft 32 from the opening 13 side, a medium-diameter portion 122 that is substantially the same as or slightly larger than the diameter of the handle rotation shaft 32, and a handle rotation shaft. A small diameter portion 121 smaller than the diameter of 32 and a medium diameter portion 122 that is substantially the same as or slightly larger than the diameter of the handle rotating shaft 32 are formed, and the small diameter portion 121 between the middle diameter portion 122 and the middle diameter portion 122 projects. The handle rotating shaft 32 has both end sides inserted into the substantially U-shaped recess 119 of the bearing 118, and the inner portions of the small diameter portions 321 on both end sides are the large diameter portion 120 and the medium diameter portion of the recess 119. Fitted to the part 122 The small-diameter portion 321 is engaged with the small-diameter portion 121, that is, the projecting reinforcing portion 121, the outer portion of the small-diameter portion 321 is fitted into the medium-diameter portion 122, and is fixed on the recess 119 with a mounting screw. Since it is held by the plate 123, even if a strong load is applied to the handle rotation shaft 32 during operation of the operation handle 3 and a force that expands the main body case 1 outward acts on the bearing 118, each protrusion of the bearing 118 By engaging the reinforcing portion 121 and the small diameter portion 321 of the handle rotating shaft 32, the force can be reduced and the main body case 1 can be protected.

  In this embodiment, the basic shape of the cross section of the main body case 1 in the direction perpendicular to the advancing / retreating direction of the latch 2 of the case 10 is a substantially isosceles trapezoid, but it may be an unequal trapezoid. It may be formed in a substantially D shape, and even in this case, the same operational effect as that of the above-described embodiment can be obtained.

F Storage F0 Inlet / outlet B Receiving part D Door D0 Push rod insertion part H Sealing safety handle 1 Main body case 10 Case 11 Opening 12 Latch mounting part 13 Opening 14 Handle mounting part 15 Opening 16 Lock unit mounting part 17 Mounting base 18 Lock plate Mounting part 19 Push bar insertion part 100 Opening 101 Groove 102 Mounting screw insertion hole 103 Mounting boss 104 Hole 105 Convex part 106 Slit 107 Cap 109 Recess 110 Convex part 111 Locking end 112 Claw 113 Locking claw 114 Support part 115 Mounting boss 116 First spring retainer member 117 Second spring retainer member 118 Bearing 119 Recessed portion 120 Large diameter portion 121 Small diameter portion (protruding reinforcement portion)
122 Medium Diameter Part 123 Plate 124 Notch 125 Mounting Screw Insertion Hole 2 Latch 20 Main Body 21 Frame 21a Side Frame 211 Convex 212 Convex 213 Convex 213 Latch Shaft Insertion Hole 21b Intermediate Frame 214 Projecting Piece 215 Projecting 216 Groove 217 Groove 218 Recess 219 Recess 22 Claw 221 Claw member 23 Locking groove 24 Latch shaft 25 Coil spring (spring member)
25L Coil Spring 25S Coil Spring 3 Operation Handle 3a Handle Lever 3b Handle Grip 30 Actuator Lever Storage 31 Hook 310 Shaft Insertion 311 Upper and Lower Both Sides 311S Small Piece 311L Large Piece 32 Handle Rotation Shaft 321 Small Diameter 33 Hole 4 Push Rod 41 Shaft 42 Pushing knob D Latch drive mechanism 5 Actuating lever 50 Shaft inserting portion 51 Lever member 52 Locking portion 53 Shaft 6 Reset lever 61 Lever member 611 Pushing portion 612 Pushing operating portion 613 Shaft inserting portion 7 Lock unit 70 Keyhole 71 Rotor 72 Lock cam 721 Cylindrical Part 722 Arc-shaped cam part K key 8 Lock plate 80 Mounting screw insertion hole 81 Fixed part 82 Movable part 821 Overhanging part 83 Bending part 84 Pressure receiving part 841 Guide piece 85 Coil spring (spring means)

Claims (4)

It is attached to one end of the front side of the door that seals the entrance of the storage and it is fixed to the side edge of the entrance of the storage, the latch is disengaged by the handle operation outside the storage, and the push rod inside the storage. A sealing safety handle of a type in which the engagement between the latch and the receiving portion is released by an operation,
The whole is formed in a long box shape and has a latch mounting portion having an opening at one end surface at one end side, a handle mounting portion having an opening from the front middle portion to the other end surface at the other end side, the latch mounting portion and the handle mounting A lock unit mounting portion having an opening at the front between the lock unit mounting portion and a lock plate mounting portion facing the lock unit mounting portion, the push bar insertion portion facing the handle mounting portion, A main body case attached to the door with the opening facing the receiving portion on the storage side,
It has a claw portion at one end and a locking groove on the other end side of the back surface, is arranged in the latch mounting portion so as to be able to move forward and backward in both ends of the main body case, and as a normal state of the latch mounting portion by a spring member. A latch that is biased toward the opening so that the claw portion projects from the opening;
The handle has a hook and an actuating lever accommodating portion at one end side, and the hook and the other end of the latch are engageable with each other so that the one end side is connected to the handle attaching portion via a handle rotation shaft. An operation handle which is rotatably and rotatably mounted in the opening, and rotates the hook toward the other end of the handle mounting portion by a rotation operation from the handle mounting portion in a standing direction to drive the latch backward.
A locking portion is provided at one end, and the locking portion and the other end of the latch are rotatably attached to the handle rotation shaft of the handle mounting portion so that the other end of the latch is engageable, and one end side is the operation of the operation handle. The lever is accommodated in the lever accommodating portion in a detachable manner, and the other end extends to the push rod insertion portion, and the hook of the operating handle and the locking portion are moved toward the other end of the handle mounting portion by rotating the operating handle in the upright direction. To drive the latch backward, and the other end receives a pressure from the back side of the main body case in the front direction to move the locking part from the actuating lever storage part to the other end direction of the handle mounting part. An actuating lever that is pivoted away to drive the latch backwards independently of the hook of the operation handle;
The lock plate attachment portion is attached to the lock plate attachment portion so as to be tiltable between the lock plate attachment portion and the latch groove, and is normally engaged with the latch groove of the latch by a spring means to restrict the retreat of the latch. Lock plate,
The lock unit is inserted into the lock unit mounting portion and a key hole is exposed in the opening on the front of the main body case, and the lock unit is of a type in which the rotor is rotated by the operation of the key inserted into the key hole, and the lock unit is connected to the rotor. By the unlocking operation of the lock unit, the lock plate is press-engaged with the lock plate mounting portion to release the engagement between the lock plate and the other end of the latch, and the lock unit is locked. A lock cam for releasing the pressure engagement with the lock plate and engaging the lock plate with the locking groove of the latch by the urging force of the spring means,
It has a pressing portion at one end and a pressing operation portion at the other end, and is parallel to the handle rotating shaft at the other end side of the operating lever than the handle rotating shaft of the handle mounting portion at the intermediate portion of the operating lever. Is rotatably mounted via a shaft disposed on the lock plate, the pressing portion is disposed on the lock plate, and the pressing operation portion is provided between the push rod insertion portion and the other end of the operation lever. The other end receives a pressure in the front direction from the back side of the main body case, and the other end of the operation lever is pressed and rotated by the pressing operation part, and the lock plate is locked by the pressing part. A reset lever that pushes and tilts to the mounting part,
A push rod that is inserted into the push rod insertion portion from the back side of the door through the door, and pushes the pressing operation portion of the reset lever from the back surface of the body case to the front direction.
Equipped with
By rotating the operation handle outside the refrigerator in the upright direction, the latch is retracted by the hook of the operation handle and the engaging portion of the operating lever to disengage the latch from the receiving portion,
By pressing the push rod in the refrigerator, the lock lever and the other end of the latch are disengaged by the reset lever, and the actuating lever is pivoted away from the actuating lever housing portion of the operation handle. Driving the latch backward by the locking portion of the operating lever,
A safety handle for sealing that is characterized.   The hook of the operation handle is formed at the center in the width direction at one end of the back surface of the operation handle, and the operation lever housing portion of the operation handle can fit the operation levers on both sides of the hook at one end of the operation handle back surface. The safety handle for sealing according to claim 1, wherein the safety lever is formed in a groove shape, and the operating lever includes a pair of lever members and is housed in the operating lever housing portion.   The hook of the operation handle is formed in a substantially hook shape, the operating lever is formed in a substantially V shape as a whole, and the locking portion is formed in a hook shape substantially the same as the hook of the operation handle. The sealing safety handle according to claim 1 or 2, wherein the whole is formed in a substantially V shape, the pressing portion is formed in a substantially natter shape, and the pressing operation portion is formed in a substantially wing shape.   The latch mounting portion of the main body case is a substantially flat plate-like member that is erected upright in the longitudinal middle portion of the latch so as to face the opening of the main body case at the normal latch installation position and can hold the end of the coil spring. A first spring holding member and a second spring holding member which is provided in parallel with the spring holding member and has a substantially semicircular holding portion capable of holding the periphery of the end portion side of the coil spring. The latch is composed of a pair of frames which are connected to each other by forming one end into a claw shape with a U-shaped cross section, and the main body forming the outer shape of the entire latch, and a U-shaped cross section on one end side of each frame of the main body. A latch member that is fitted and fixed inside and that is provided between the other end of each frame of the main body portion and the claw member that forms the claw portion of the latch, and that is engaged with the hook of the operation handle and the locking portion of the operating lever. And a latch shaft forming an end, A recess is formed on the surface of the member facing the other end of the latch so that the end of the coil spring can be fitted, the latch is installed in the latch mounting portion, and a coil spring having a large diameter is used as a spring member of the latch. A double coil spring incorporating a small diameter coil spring is fitted at one end into the concave portion of the pawl member, and the other end is surrounded by the first spring pressing member in the latch mounting portion to surround the other end. The sealing safety handle according to any one of claims 1 to 3, which is pressed by the second spring pressing member and is arranged between the claw member and the first spring pressing member.

Images