Retractable hinge

Abstract

To provide a retractable hinge which disperses a load applied to a connection support part between a movable side member and a fixed side member, and which can be used for a heavy door without hindrance.SOLUTION: A retractable hinge 1 includes a fixed side member 2, a movable side member 3, and an upper part pivotally supporting member 4. The fixed side member 2 includes a lower part shaft receiving part 22 below a mounting part 21 to a fixed frame body 101, and a connection part 23 of the upper part pivotally supporting member 4 above the mounting part. The upper part pivotally supporting member 4 includes an upper part shaft receiving part 42 opposing to the lower part shaft receiving part 22, and is fastened to the fixed side member 2 by fitting a corresponding connection part 41 into the connection part 23. The movable side member 3 includes a lower part shaft 32 extending downward from a fastening part 31 to a door 102, and an upper part shaft 33 extending upward. The lower part shaft 32 is pivotally supported at the lower part shaft receiving part 22 and the upper part shaft 33 is pivotally supported at the upper part shaft receiving part 42 respectively. The connection support of the fixed side member 2 and the movable side member 3 is a both-end-support structure and its mechanical strength is high.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a detachable hinge that is fixed between the vertical end face on one side of a door and the front corner portion of a fixed frame body in commercial refrigerators, freezers, kitchen appliances, etc., and can detach the door from the fixed frame body as needed.

Background Art

[0002] As a hinge that includes a fixed-side member fixed to the front corner portion of a fixed frame body and a movable-side member fixed to the vertical end face on one side of a door, and can detach the door from the fixed frame body as needed, for example, what is described in Patent Document 1 is known. In this hinge, the fixed-side member fixed to the fixed frame body includes a support seat portion that projects from the lower side surface. This support seat portion has a vertical bearing hole, and a fixed cam body having a driving cam surface is fitted inside it. The movable-side member fixed to the door includes a vertical pivot that extends integrally downward, and this is inserted into the vertical bearing hole of the fixed-side member. The vertical pivot has a driven cam surface at the lower end, and this abuts against the driving cam surface. When the vertical pivot of the movable-side member rotates as the door rotates in the opening direction, the vertical pivot is pushed upward integrally with the door by the sliding of the two cam surfaces. The door automatically rotates to close by the two abutting cam surfaces and the weight of the door.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the conventional hinge described above, the movable member to which the weight of the door is applied is placed on the support seat portion of the fixed member, and the vertical pivot of the movable member is fitted into the vertical shaft hole of the fixed member, resulting in a cantilever support structure. In order to enable insertion and removal, the upper part of the movable member is not constrained and supported by the fixed member at all. Therefore, when the door is heavy and used over a long period of time, a large load is applied to the connection support portion between the movable member and the fixed member, causing the door to tilt due to deformation or causing damage to the members. Accordingly, an object of the present invention is to provide a detachable hinge for a corner portion that can remove the door from the fixed frame body as needed, disperse the load applied to the connection support portion between the movable member and the fixed member, and can be used without problems even for a heavy door, and can easily adjust the tilt of the door and the compression amount of the packing between the door and the frame body.

Means for Solving the Problems

[0005] In the following description, reference is made to the reference numerals in the accompanying drawings, but the present invention is not limited thereto. To solve the above problems, the detachable hinge 1 of the present invention includes a fixed-side member 2 fixed to the fixed frame 101, a movable-side member 3 fixed to the door 102 and pivotally supported at the lower part to be rotatable around a vertical axis with respect to the fixed-side member 2, an upper pivot member 4 detachably provided on the upper part of the fixed-side member 2 and pivotally supporting the upper part of the movable-side member 3 to be rotatable around a vertical axis with respect to the fixed-side member 2, and a spacer plate made of synthetic resin selectively inserted between the door and the movable-side member. The fixed-side member 2 includes an attachment portion 21 to the fixed frame 101, a lower bearing portion 22 provided at the lower part of the attachment portion 21, and a connection portion 23 provided at the upper part of the attachment portion 21. The attachment portion 21 is fixed to the vertical front surface of the fixed frame 101 along the back surface with a plurality of screws arranged vertically. The lower bearing portion 22 is provided to protrude forward from the lower part of the attachment portion 21 and has an upward vertical axis hole 22a. The connection portion 23 is provided at the upper part of the attachment portion 21 and is fixed by fitting the upper pivot member 4 vertically. The upper pivot member 4 includes a corresponding connection portion 41 connected to the connection portion 23 of the fixed-side member 2 and an upper bearing portion 42 facing the lower bearing portion 22 of the fixed-side member 2. The corresponding connection portion 41 is vertically fitted to the connection portion 23 of the fixed-side member 2 and fixed with a fixing screw 5. The upper bearing portion 42 has a downward vertical axis hole 42a facing the vertical axis hole 22a of the fixed-side member 2. The movable-side member 3 includes a fixing portion 31 fixed to the vertical side surface on the hanging side of the door 102, a lower shaft 32 extending downward from the fixing portion 31, and an upper shaft 33 extending upward. The lower shaft 32 is pivotally supported by the vertical axis hole 22a of the fixed-side member 2, and the upper shaft 33 is pivotally supported by the vertical axis hole 42a of the upper pivot member 4. The spacer plate 8 has the same outer edge shape overlapping the back surface 3a of the movable-side member 3 and has a notch portion 8a extending laterally from the side edge at a position corresponding to a plurality of screws 9 for fixing the fixing portion 31.

Effect of the Invention

[0006] In the plug-in hinge 1 of the present invention, a fixed-side member 2, a movable-side member 3, and an upper pivot member 4 are provided. The fixed-side member 2 includes a lower bearing portion 22 below an attachment portion 21 to a fixed frame body 101 and a connection portion 23 above for detachably fixing the upper pivot member 4. The upper pivot member 4 is fixed to the fixed-side member 2 and includes an upper bearing portion 42 facing the lower bearing portion 22. The movable-side member 3 includes a lower shaft 32 extending downward from a fixing portion 31 to a door 102 and an upper shaft 33 extending upward. Since the lower shaft 32 is pivotally supported by the lower bearing portion 22 and the upper shaft 33 is pivotally supported by the upper bearing portion 42, the connection support between the fixed-side member 2 and the movable-side member 3 has a double-supported structure, and the bending stress and shear stress caused by the weight of the door 102 are dispersed and received, so that the plug-in hinge 1 with improved mechanical strength can be obtained. The upper pivot member 4 can be easily assembled to the fixed-side member 2 by simply fitting it vertically into the connection portion 23 of the fixed-side member 2 and screwing it, so that the attachment and detachment operation of the door to the fixed-side member 2 is easy. After the fixed-side member 2 is attached to the fixed frame body 101, when the door 102 tilts over time, or when angle adjustment is required with respect to the fixed frame body 101 during installation of the door 102, the fixing screw 9 of the movable-side member 3 is slightly loosened to create a gap with the door 102, and a spacer plate 8 is inserted laterally here. Since the notch portion 8a receives the fixing screw 9, the spacer plate 8 overlaps the back surface of the movable-side member 3. By adjusting the number of spacer plates 8 inserted according to the tilt angle of the door and tightening the fixing screw 9 again, the angle adjustment of the door 102 is completed.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Mode for Carrying Out the Invention

[0008] Embodiments of the present invention will be described with reference to the drawings. The detachable hinge 1 includes a metal fixed-side member 2 fixed to a fixed frame body 101 such as a housing of a large refrigerator, a metal movable-side member 3 fixed to a door 102, a metal upper pivot member 4 detachably provided on the upper part of the fixed-side member 2, and a synthetic resin spacer plate 8 selectively inserted between the door 102 and the movable-side member 3. The detachable hinge 1 is mounted in a pair, one above the other, between the fixed frame body 101 and the door 102. The spacer plate 8 is selectively provided when necessary, and the figure shows a state in which the spacer plate 8 is mounted.

[0009] The movable-side member 3 is pivotally supported at the lower part so as to be rotatable about a vertical axis with respect to the fixed-side member 2. The upper pivot member 4 pivotally supports the upper part of the movable-side member 3 so as to be rotatable about a vertical axis with respect to the fixed-side member 2.

[0010] The fixed-side member 2 includes an attachment portion 21 to the fixed frame body 101, a lower bearing portion 22 provided at the lower part of this attachment portion 21, and a connection portion 23 provided at the upper part of the attachment portion 21.

[0011] The fixed-side member 2 is fixed to the vertical front surface of the fixed frame body 101 with three screws along the back surface at the attachment portion 21. The lower bearing portion 22 is provided so as to project forward from the lower part of the attachment portion 21 and has an upward vertical axis hole 22a. The connection portion 23 is provided at the upper part of the attachment portion 21 and fits the upper pivot member 4 in the vertical direction.

[0012] The upper pivot support member 4 includes a corresponding connection portion 41 connected to the connection portion 23 of the fixed-side member 2 and an upper bearing portion 42 facing the lower bearing portion 22 of the fixed-side member 2. The upper pivot support member 4 is fixed to the fixed-side member 2 in order to pivotally support the upper portion of the movable-side member 3 attached to the door 102. That is, after the upper pivot support member 4 fixes the fixed-side member 2 to the fixed frame 101 and the movable-side member 3 to the door 102 respectively, the lower shaft 32 of the movable-side member 3 is inserted into the vertical shaft hole 22a of the fixed-side member 2, and after the door 102 is supported by the fixed-side member 2, it is fixed to the fixed-side member 2.

[0013] The corresponding connection portion 41 is vertically fitted into the connection portion 23 of the fixed-side member 2 and fixed to the connection portion 23 with the fixing screw 5. The upper bearing portion 42 has a downward vertical shaft hole 42a facing the vertical shaft hole 22a of the fixed-side member 2.

[0014] The movable-side member 3 includes a fixing portion 31 fixed to the vertical side surface 102a on the hanging side of the door 102 with three screws 9, a lower shaft 32 extending downward from this fixing portion 31, and an upper shaft 33 extending upward. The lower shaft 32 is pivotally supported by the vertical shaft hole 22a of the fixed-side member 2, and the upper shaft 33 is pivotally supported by the vertical shaft hole 42a of the upper pivot support member 4.

[0015] The connection portion 23 of the fixed-side member 2 includes a receiving seat surface 231 forming the upper end surface of the attachment portion 21, a back plate portion 232 vertically extending upward along the front surface 101a of the fixed frame 101 from this receiving seat surface 231, and a fitting convex portion 233 extending upward along the back plate portion 232 from the receiving seat surface 231. The fitting convex portion 233 includes a pair of vertical engaging grooves 233a formed on the left and right side surfaces and a vertical screw hole 233b opening on the upper end surface.

[0016] As shown in Fig. 8, the corresponding connection portion 41 of the upper pivot support member 4 includes a fitting recess 411 for fitting the fitting convex portion 233, and a pair of opposed fitting ridges 411a formed inside the fitting recess 411 so as to fit into the engagement groove 233a. The vertical shaft hole 42a and the fitting recess 411 communicate with each other through a vertical slit 411b. The upper end of the fitting recess 411 is closed by a top plate portion 412 that abuts against the upper end of the fitting convex portion 233 (Fig. 7). The top plate portion 412 has a screw hole 412a corresponding to the screw hole 233b of the fitting convex portion 233. The upper pivot support member 4 is fixed to the connection portion 23 of the fixed side member 2 by a fixing screw 5 that is screwed into the screw hole 233b of the fitting convex portion 233 through the screw hole 412a from above the top plate portion 412.

[0017] A synthetic resin bearing collar 6 for inserting the upper shaft 33 is provided in the downward vertical shaft hole 42a of the upper pivot support member 4. The bearing collar 6 includes a bearing cylinder portion 61 and a screw receiving ring 6 connected to the bearing cylinder portion 61 by a rib 62.

[0018] The bearing cylinder portion 61 is fitted into the vertical shaft hole 42a so as to insert the upper shaft 33, and the rib 62 is fitted into the slit 411b. The screw receiving ring 63 is connected to the upper end portion of the rib 62, intervenes between the upper end of the fitting convex portion 233 and the top plate portion 412 of the fitting recess 411, and penetrates the fixing screw 5.

[0019] The attachment and detachment of the upper pivot support member 4 to and from the fixed side portion 2 can be easily performed only by attaching and detaching the fixing screw 5 and inserting and removing the connection portions 23 and 41 in the vertical direction. Therefore, the attachment and detachment of the door 102 can also be easily performed.

[0020] Since the lower shaft 32 is pivotally supported by the lower bearing portion 22 and the upper shaft 33 is pivotally supported by the upper bearing portion 42, the connection support between the fixed side member 2 and the movable side member 3 has a both-end supported structure, and the mechanical strength is improved as compared with the conventional cantilever structure.

[0021] In the illustrated embodiment, the lower shaft 32 has an inclined cam surface 32a at its lower end. Correspondingly, a synthetic resin cam member 7 having an inclined cam surface 72a corresponding to the inclined cam surface 32a of the lower shaft 32 is fitted into the upward vertical shaft hole 22a. The cam member 7 includes a cylindrical portion 71 for receiving the lower shaft 32 and a bottom portion 72 for closing the lower end of the cylindrical portion 71, and the inclined cam surface 72a is formed on the bottom portion 72. As the lower shaft 32 of the movable side member 3 rotates with the rotation of the door 102 in the opening direction, the lower shaft 32 is pushed upward integrally with the door 102 by the sliding of the two inclined cam surfaces 32a and 72a. The door 102 is automatically rotated to close by the two abutting cam surfaces 32a and 72a and the self-weight of the door 102.

[0022] Note that the present invention can also be applied to a hinge that does not have the above-described automatic closing structure.

[0023] The spacer plate 8 is selectively inserted between the door 102 and the movable side member 3 mainly in the lower hinge when the door 102 tilts over time after the fixed side member 2 is attached to the fixed frame 101, or when angle adjustment is required for the fixed frame 101 during the installation of the door 102.

[0024] The spacer plate 8 has the same outer edge shape as the back surface 3a of the movable side member 3 and has cutouts 8a extending laterally from the side edge at positions corresponding to a plurality of screws 9 for fixing the fixing portion 31. When installing, the fixing screw 9 of the movable side member 3 is slightly loosened to create a gap with the door 102, and the spacer plate 8 is inserted laterally here. Since the cutout 8a receives the fixing screw 9, the spacer plate 8 overlaps the back surface of the movable side member 3. By adjusting the number of spacer plates 8 inserted according to the tilt angle of the door 102 and tightening the fixing screw 9 again, the angle adjustment of the door 102 is completed.

Explanation of Reference Numerals

[0025] 1 Plug-and-play hinge 2 Fixed side member 21 Mounting portion 22 Lower bearing portion 22a Vertical shaft hole 23 Connection part 231 Receiving seat surface 232 Back panel part 233 Fitting convex part 233a Engaging groove 233b Screw hole 3 Movable side member 3a Back of the movable side member 31 Fixing part 32 Lower shaft 32a Inclined cam surface 33 Upper shaft 4 Upper pivot support member 41 Corresponding connection part 411 Fitting recess 411a Fitting ridge 411b Slit 412 Top plate part 412a Screw hole 42 Upper bearing part 42a Vertical shaft hole 5 Fixing screw 6 Bearing collar 61 Bearing cylinder part 62 Rib 63 Screw receiving ring 7 Cam member 71 Bearing cylinder part 72 Bottom part 72a Inclined cam surface 8 Spacer plate 8a Notch 9 Fixing screw 101 Fixed frame body 102 Door 102a Side surface of the door

Claims

1. a fixed-side member fixed to a fixed frame body, a movable-side member fixed to a door and pivotally supported at a lower portion thereof to be rotatable about a vertical axis with respect to the fixed-side member, an upper pivot member detachably provided on an upper portion of the fixed-side member and pivotally supporting an upper portion of the movable-side member to be rotatable about the vertical axis with respect to the fixed-side member, and a synthetic resin spacer plate selectively inserted between the door and the movable-side member, the fixed-side member includes an attachment portion fixed along a back surface to a vertical front surface of the fixed frame body, a lower bearing portion provided to protrude forward from a lower portion of the attachment portion and having an upward vertical axis hole, and a connection portion provided on an upper portion of the attachment portion for fitting and fixing the upper pivot member in a vertical direction, the upper pivot member includes a corresponding connection portion fitted in a vertical direction to a connection portion of the fixed-side member and fixed to the connection portion with a fixing screw, and an upper bearing portion having a downward vertical axis hole facing the vertical axis hole of the fixed-side member, the movable-side member includes a fixing portion fixed along a back surface to a vertical side surface on a hanging end side of the door with a plurality of screws arranged vertically, a lower shaft extending downward from the fixing portion and pivotally supported by a vertical axis hole of the fixed-side member, and an upper shaft extending upward from the attachment portion and pivotally supported by a vertical axis hole of the upper pivot member fixed to the fixed-side member, the spacer plate has the same outer edge shape overlapping a back surface of the fixing portion of the movable-side member, and includes notches extending laterally from a side edge at positions corresponding to the plurality of screws for fixing the fixing portion, and is characterized by a detachable hinge.

2. the connection portion of the fixed-side member includes a receiving seat surface forming an upper end surface of the attachment portion, a back plate portion vertically extending upward along a front surface of the fixed frame body from the receiving seat surface, and a fitting convex portion extending upward along the back plate portion from the receiving seat surface, the fitting convex portion includes a pair of vertical engaging grooves formed on left and right side surfaces and a vertical screw hole opening on an upper end surface. The corresponding connection part of the upper pivot support member includes a fitting recess for fitting the fitting convex part, a pair of opposed fitting ridges formed inside the fitting recess so as to fit into the engagement groove, and a top plate part having a screw hole corresponding to the screw hole of the fitting convex part and closing the upper end of the fitting recess so as to contact the upper end of the fitting convex part. The detachable hinge according to claim 1 is characterized in that it is provided so as to be fixable to the connection part of the fixed side member by the fixing screw screwed into the screw hole of the fitting convex part through the screw hole from above the top plate part.

3. The detachable hinge according to claim 1 is characterized in that a synthetic resin bearing collar for inserting the upper shaft is provided in the downward vertical shaft hole of the upper pivot support member.

4. A synthetic resin bearing collar for inserting the upper shaft is provided in the downward vertical shaft hole of the upper pivot support member, the downward vertical shaft hole and the fitting recess communicate with each other through a vertical slit, the bearing collar includes a bearing cylinder part for inserting the upper shaft, a rib extending from the bearing cylinder part and fitting into the slit, and a screw receiving ring provided at the upper end of the rib and interposed between the upper end of the fitting convex part and the top plate part of the fitting recess and allowing the fixing screw to pass through. The detachable hinge according to claim 2 is characterized by this.

5. the lower shaft has an inclined cam surface at the lower end, a synthetic resin cam member having an inclined cam surface that contacts the inclined cam surface of the lower shaft is provided in the upward vertical shaft hole, the cam member includes a cylinder part for receiving the lower shaft and a bottom part closing the lower end of the cylinder part, and the inclined cam surface is formed on the bottom part. The detachable hinge according to any one of claims 1 to 4 is characterized by this.

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