JPH079987Y2 - Showcase door structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a structure of a hinge used for a door of a refrigerator, a freezer showcase, or the like.

(Prior Art) Ordinary doors are either hinged and have an automatic return device built into the door, or provided in the hinge device to easily open the door by applying a small force to the door. I am trying to close it.

As a hinge for a refrigerator or freezer showcase door,
For example, Japanese Utility Model Laid-Open No. 59-69384 includes a rotary shaft attached to a lower end surface of one end of a door and a fixed shaft attached to a door frame engaging with the rotary shaft. In the circumferential direction of the rotation center axis of, the automatic closing inclined portion that inclines upward from the lower position in sequence, the intermediate pawl protruding portion, the inclined or flat opening portion, and the stopper end portion. Are continuously provided, and on the other hand, around the bearing portion of the rotary shaft attached to the door, it moves between the automatic closing inclined portion, the intermediate claw protruding portion and the opening portion as the door rotates. A pawl is provided, and the pawl of the rotary shaft moves between the automatic closing inclined part, the intermediate pawl protruding part, and the opening part as the door rotates, thereby opening, maintaining the open, and stopping the door. Also disclosed is a door structure that allows for automatic closing.

(Problems to be solved by the invention) In the above technology, since the door is opened while the rotating shaft is raised along the automatic closing inclined portion of the fixed shaft attached to the lower end of the door, The gap between the door and the main unit side frame changes due to opening and closing, and the lead wire and ground wire that are installed at the top end of the door and inserted from the opening / closing pin are not only twisted but also broken due to vertical movement and the covering material. There is a concern that peeling may occur, and more complicated processing may be required due to the combination of parts having complicated shapes.

(Means for Solving Problems) The present invention has been made in view of the above-mentioned problems of the related art, and an object thereof is to maintain the opening and automatically close the door at a predetermined position with simple parts. The support shafts provided above and below one side end are pivotally supported via a hinge plate that is fixed to the body of the showcase, and the other side end is attached with a handle. A pair of fixing plates which are laterally separated from each other and vertically suspended from the lower surface of the lower hinge plate, and one end of which is fixed to a rotary shaft provided near the main body, and the other end of which sandwiches a sandwiching plate between the fixing plates. A rotatable arm plate, a compression coil spring disposed between the holding plate and one of the fixed plates that hang down to the rotation shaft side, and a hole formed at the center of the holding plate. A support rod for loosely inserting the coil spring into the cylinder and fixing both ends of the coil spring to the fixing plate. The present invention provides a door structure for a showcase, which is equipped with a pressing means consisting of, and further, a stopper for stopping the door at a predetermined opening position is provided upright on the side of the arm plate near the main body. It provides a door structure.

Embodiment An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is an assembled perspective view illustrating a main part of a door with a part cut away according to the present invention, FIG. 2 is a sectional view taken along the line AA of FIG. 1 showing opening and closing of the door, and FIG. 3 is a showcase. It is a perspective view which shows the whole.

For example, the door 2 of the frozen showcase 1 is composed of a metal door frame 3 on four sides, and a magnet-equipped packing 5 for adhering the main body 4 of the showcase 1 to the back surface of the frame is attached. A supporting shaft 6 is erected on the upper and lower end surfaces at one end of the frame, the supporting shaft is pivotally supported by hinge plates 7 and 7'fixed to the upper and lower parts of the main body 4, and a grip is provided at the other end. 8 is provided so that the handle can be gripped to open and close the swing around the support shaft 6.

As a function of automatically closing and maintaining the opening of the door, a pair of fixing plates 9 and 9'provided on the lower end surface of the door 2, that is, the lower surface of the door frame 3 so as to traverse the thickness direction of the door 2 and be separated downward. Between the coil spring 10 and one of the spring seats is fixed plate 9
And a clamping plate 11 for abutting and clamping the other, and a laterally long hole 12 bored in the center of the clamping plate and a coil spring.
A support rod 13 for loosely inserting the inside of the cylinder 10 and fixing both ends to the fixing plates 9 and 9'is provided. The support rod 13 is fixed by a bolt hole (not shown) at the center of the fixing plates 9 and 9 '. And a support rod 13 for cutting a screw (not shown) at both ends is inserted into the bolt hole, and a nut 14 is fastened to the protruding screw portion.

As the pressing means 18 , a rotatable pendant rotation shaft 15 is supported on the lower surface of the L-shaped hinge plate 7'which is screwed to the lower side of the main body 4 and is pivotally supported from the support shaft 6 toward the showcase main body 4 side. To
One end of the arm plate 16 is fixed, and the holding plate 11 is fixedly erected on the other end side of the arm plate.
And are connected integrally.

A plate-shaped stopper 17 is provided upright on the side of the arm plate 16 near the showcase body 4, and its mounting position is, for example, at a position where the door 2 is opened at 110 °. It is arranged so that the side edges of the fixed plate 9 provided near the side contact.

The operation of the present invention will be described below.

The door 2 is opened and closed centering on the support shaft 6, but the holding plate 11 is also driven integrally with the door 2 by the pair of fixed plates 9 and 9'and the support rods 13 fixed to the fixed plates 9 and 9 '. .

In the pursuit, the fixed plates 9 and 9'are centered on the support shaft 6,
Since the holding plate 11 rotates about the rotation shaft 15 with the arm plate 16 as the radius, the turning locus between the holding plate 11 and the fixed plates 9 and 9'is the opening of the door 2 as shown in FIG. The clamping plate 11 compresses the abutting coil spring 10, and if the grasping hand of the door is removed, the clamping force of the clamping plate 11 is pushed by the restoring force of the coil spring 10 and the door 2 is automatically closed.

The sandwiching plate 11 compresses the coil spring 10 to the shortest when the door 2 is opened, that is, at an opening position of 90 °, and the restoring force of the coil spring 10 with this as a boundary is when the opening position of the door 2 is less than 90 °. Has a function of closing the door 2, and a function of constantly opening the door 2 when it exceeds 90 °.

By using this action, for example, the opening angle of the door 2
At the position of 110 °, the fixed plate 9 rotating around an axis different from the axis for rotating the arm plate abuts the stopper 17 standing on the side of the arm plate 16 with a positional deviation. The abutment prevents the door 2 from further opening due to the restoring force of the coil spring 10, and the door maintains the state of being stopped by the restoring force of the stopper 17 and the coil spring 10.

The door 2 is closed automatically at an acute opening angle of 90 ° or less when the handle 8 is released, and the door frame 3 and the main body 4 are brought into close contact with each other by the packing 5 with a magnet.

When the door 2 is slightly opened and closed, there is a concern that the restoring force of the coil spring 10 is so small that the turning force in the closing direction is small and the door cannot be closed. If the coil spring 10 is attached in a compressed state in advance, it will be completely sealed and solved.

If one end of the coil spring 10 is connected to the rotary shaft 15 and the other end is connected to the fixing plate 9 ', the door 2 can be automatically closed by the pulling force generated when the door 2 is opened. Compared to the structure, the tensile force is unsuitable because the structure is unreasonable due to fear of fatigue fracture from the connecting portion due to repeated loading.

Although the present invention is mounted on the lower part of the showcase door, it may be mounted on the upper part and can be mounted on a partition door or the like.

(Effects of the Invention) The present invention automatically closes the door used for a showcase, etc. by the above-mentioned simple structure, and has a function of maintaining the opening of the door for reliable operation, and the simple structure reduces the manufacturing process. , The practical effect is extremely high.

[Brief description of drawings]

FIG. 1 is an assembled perspective view illustrating a main part of a door with a part cut away according to the present invention, FIG. 2 is a sectional view taken along the line AA of FIG. 1 showing opening and closing of the door, and FIG. 3 is a showcase. It is a perspective view which shows the whole. 1 ... Showcase, 2 ... Door, 4 ... Main body 6 ... Support shaft, 7, 7 '... Hinge plate, 9, 9' ... Fixed plate, 10 ... Coil spring 11 ... Clamp plate, 13 ... Support rod, 15 ... Rotation Axis, 16 ... arm plate,
17 ... Stopper 18 ... Pressing means

Claims (2)

[Scope of utility model registration request] 1. A lower end surface of a door in which a support shaft provided above and below one side end is pivotally supported via a hinge plate fixed to a main body of a showcase and a handle is attached to the other side end. A pair of fixing plates that are vertically separated from each other in the thickness direction of the door, and one end is fixed to a rotation shaft that is hung from the lower surface of the lower hinge plate and that is provided near the main body, and the other end side is between the fixing plates. A coil spring for compression is provided between a rotatable arm plate that vertically installs a sandwiching plate and one of the stationary plates that hangs down on the rotation shaft side, and the compression coil spring is provided at the center of the sandwiching plate. A door structure for a showcase, characterized in that a pressing means composed of a hole to be provided and a cylinder of the coil spring is loosely inserted and both ends thereof are fixed to the fixing plate. 2. The door structure for a showcase according to claim 1, wherein a stopper for stopping the door at a predetermined opening position is provided upright on the side of the arm plate near the main body.