JPS641416Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a closing device for a sliding door of a commercial refrigerator.

Conventional sliding double doors of commercial refrigerators have elastic sealing members on the mating surfaces and are large in mass, so the inertia of sliding when closing the doors causes them to rebound after the mating surfaces of both doors collide. However, it is difficult to obtain a normal closed state with one closing operation, and the sealing member is likely to be damaged. This also applies to sliding single-opening doors.

In view of these conventional problems, the present invention has been developed to provide a closing device for a refrigerator sliding door, which is configured to prevent the door from bouncing back when the door is closed and to obtain a normal closed state with a single closing operation. The purpose is to provide

A feature of the present invention to achieve this purpose is a sliding door closing device installed in the entrance frame to open and close the entrance of the refrigerator, and is fixed to either the entrance frame or the door. An engagement member is provided on the other side of the stopper, and the engagement member includes an abutment portion that comes into contact with the first contact surface of the fixed stopper when the door is closed, and a contact portion that comes into contact with the first contact surface of the fixed stopper when the door is closed. A regulating portion that can come into contact with a second abutting surface opposite to the first abutting surface is provided, and the engaging member has an abutting portion that can come into contact with a fixed stopper, and a regulating portion that can come into contact with a fixed stopper. A pressure member is provided so as to be changeable between a pre-engagement position in which it is retracted and a post-engagement position in which the abutment part is retracted from the fixed stopper and the regulating part abuts, and which presses against each position. The point is that it is

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the whole front of a commercial refrigerator 1. A rectangular entrance frame 3 provided on the wall of the refrigerator 1 forms an entrance 4, and an upper member 3a of the entrance frame 3 is arranged on the left and right sides. A rail 5 is bolted to the front surface of the upper member 3a, and a driven sprocket 6 and a driving sprocket 7 are provided at the left and right ends of the upper member 3a, and a chain 8 is wound between them. A motor 9 for driving a drive sprocket 7 is provided at the right end of the upper member 3a.

In FIGS. 1 to 3, reference numeral 11 denotes a pair of left and right sliding doors, which are formed approximately symmetrically on the left and right except for the lock fittings 12, and a set of two wheels 13 are provided at two places on the left and right of the upper part. The wheels 13 are rotatably engaged on the rails 5 and support the door 11 in a hanging manner. One of the doors 11 is connected to the upper side of the chain 8, and the other is connected to the lower side of the chain 8, and the doors 11 are moved oppositely as the chain 8 is moved by the motor 9.

An L-shaped support stand 14 is fixed to the top surface of the door 11 via bolts 15 so that its position can be adjusted in the front and back direction, and a derailment prevention plate 16 is attached to the back side of this support stand 14.
is fixed and can be adjusted vertically. Nut 1 18 passes through the support base 14 and the derailment prevention plate 16.
The bolt fixed by 7 rotatably supports the wheel 13 via a bearing, and the vertical position can be adjusted with respect to the support base 14.
Although the relative position is fixed, it may be adjustable.

The wheel derailment prevention plate 16 is formed in an L-shape and goes around the underside of the rail 5 on which the wheels 13 roll, so that even if the door 11 is lifted upward, the derailment prevention plate 16 will not touch the rail 5. By hitting the wheel 1
3 does not come off the rail 5.

Although the rail 5 is not shown, the distance between the rail 5 and the upper member 3a is slightly narrower at the center than at both left and right ends, and seal members 19 are provided on three sides of the door 11 excluding the mating surface 11a. and entrance frame 3 are door 11
The door 11 is configured to be in close contact with each other when closed to more reliably maintain airtightness inside the refrigerator 1, and this also makes it easier to open and close the door 11.

An elastic seal member 2 is provided on the mating surface 11a of each door 11.
1, and a guide rail 22 and a lower seal member 23 are provided on the lower surface 11b.
The guide rail 22 is provided along the lower edge of the door 11, and has two sets of front and rear horizontal rollers 26 supported on the floor 24 via a mounting plate 25 so as to be rotatable around a vertical axis.
It is inserted between them, and is guided by four horizontal rollers 26 so as to move linearly in the opening/closing direction. Since the four horizontal rollers 26 are located in front of the lower part of the side member 3b of the entrance frame 3, there is no problem in taking articles into and out of the refrigerator 1.

The lower sealing member 23 has four sealing tongue pieces 2.
7, the lower edge of this lower sealing member 23 is in slidable contact with the floor 24, and seals the lower part of the door 11. A heater cord (not shown) is wired to the insertion hole 28 formed in the lower seal member 23 to prevent the inside of the refrigerator 1 from freezing more than necessary. This heater cord is for floor 2
It may be buried within 4.

The main part of the closing device 31 of the present invention is provided on the top of each door 11, and 32 is its support plate.
This support plate 32 fits into the two bolts 18 and is secured by nuts 17 and 33,
The left and right positions can be adjusted freely. A notch 34 is formed in the support plate 32, and an engaging member 35 is pivotally supported above the notch 34 by a bolt shaft 36.

The engaging member 35 is a substantially U-shaped plate having a contact portion 37 and a regulating portion 38 arranged at a substantially right angle at both ends thereof, and a link 39 is pivotally connected to the intermediate portion by a bolt 40 .

The link 39 passes through a hole 41 in the side wall 32a bent forward of the support plate 32, and a coil spring 43 is fitted between the side wall 32a and a double nut 42 screwed onto the pivot point side. 4
3 (pressing member), the link 39 is always pressed toward the pivot point. The double nut 42 can adjust the elastic force of the coil spring 43.

The engagement member 35 is formed with a first stopper surface 45 and a second stopper surface 46, and can come into contact with the upper wall 32b bent forward of the support plate 32. As shown by the imaginary line in the diagram, the first stopper surface 45 is in contact with the upper wall 32b in the pre-engagement position A, and as shown in the solid line, the second stopper surface 46 is in contact with the upper wall 32b in the pre-engagement position A. The coil spring 43 is rotatable between the engagement member 35 and the position B.
is unstablely switched when changing its position between the pre-engagement position A and the post-engagement position B, so that it is pressed against the upper wall 32b at each position A and B, and the position is reliably maintained. Although the coil spring 43 is used as a compression spring, it can also be configured to be used as a tension spring in order to unstably switch the engagement member 35.

47 is a fixed stopper fixed to the front surface of the rail 5 via a bolt 48 so that the left and right position can be freely adjusted;
It is formed of a letter-shaped plate, one side 47a of which is located on the locus of movement of the engagement member 35 and can move in and out of the notch 34, and a cushioning member 49 made of rubber or the like is provided on the surface facing the engagement member 35. is fixed to form a first contact surface 50, and the opposite surface is a second contact surface 5.
1. A buffer may also be fixed to this second contact surface 51 side.

The hole 52 into which the bolt 48 of the fixed stopper 47 is inserted is an elongated hole in the left and right direction, and the elongated holes 52 are formed in pairs, two on the left and right, and two pairs are formed vertically symmetrically with respect to the vertical center. It can be applied to both the left and right doors 11.

A cover 53 is fixed to the upper member 3a via a support arm 54, and covers the front side of the rail 5, the closing device 31, etc.

Next, the operation of the closure device 31 will be explained.

When each door 11 is closed from the open state by the drive of the motor 9, the engagement member 35 is in the pre-engagement position A shown by the imaginary line in FIG. 37 comes into contact with the first contact surface 50 of the fixed stopper 47, and the engagement member 35 rotates against the elastic force of the coil spring 43 so that the contact portion 37 is retracted to the solid line position due to this contact. moved, regulation part 3
8 goes around to the fixed stopper 47 side and becomes position B after engagement.

Each door 11 is stopped when the support plate 32 comes into contact with the first abutment surface 50 of the fixed stopper 47, and the seal members 21 of both doors 11 come into contact to seal the entrance 4. At this time, if both doors 11 rebound after the collision due to the sliding inertia of the doors 11, the regulating portion 38
comes into contact with the second contact surface 51 of the fixed stopper 47,
The engagement member 35 attempts to rotate from the post-engagement position B to the pre-engagement position A against the coil spring 43. However, since this rebound force is sufficiently small, the engaging member 3
5 only slightly rotated, and the door 1 bounced back.
1 is pushed back in the closing direction by the coil spring 43, and the fixed stopper 4 is fixed by the support plate 32 and the regulating part 38.
7, and the door 11 can be completely closed.

The door 11 is opened from the closed state by driving the motor 9, and the regulating part 3 is attached to the fixed stopper 47.
8 is in contact with the door 1 against the coil spring 43.
1 moves and is released while changing the position of the engagement member 35 from the post-engagement position B to the pre-engagement position A.

Incidentally, the present invention can be similarly applied even if the refrigerator 1 is a single-opening type or the door 11 is a manual type. Furthermore, the same effect can be obtained by attaching the support plate 32 having the engaging member 35 to the rail 5 and attaching the fixed stopper 47 to the door 11.

According to the present invention described in detail above, the fixed stopper 47 contacts the contact portion 37 of the engagement member 35 immediately before the door 11 closes, and resists the elastic force to prevent the engagement member 35 from closing.
Since the position of the engagement member 35 is changed from the pre-engagement position A to the post-engagement position B, a buffer can be provided when the door 11 is closed, and even if the door 11 bounces back from the closed position, the engagement member 35 in the post-engagement position B can be moved. Since the regulating part 38 and the fixed stopper 47 come into contact with each other, the rebound is prevented as if pushed back, and the normal closing state is finally achieved. Since there is no large shock, damage to the sealing member 21 is reduced, and once the A normal closed state is obtained by the closing action.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a partially cutaway front view of a refrigerator to which the present invention is applied, and FIG.
The figure is an explanatory longitudinal cross-sectional view of the refrigerator, and FIG. 3 is a front view of the present invention. 1... Refrigerator, 3... Entrance frame, 4... Entrance, 5
... Rail, 11 ... Door, 21 ... Elastic sealing member, 31 ... Closing device, 32 ... Support plate, 35 ...
...Engagement member, 37...Abutment part, 38...Restriction part,
43...Coil spring, 47...Fixed stopper, 5
0...First contact surface, 51...Second contact surface, A...
Pre-engagement position, B...Post-engagement position.

Claims (1)

[Scope of utility model registration request] This is a closing device for a sliding door 11 provided on an entrance frame 3 to open and close an entrance 4 of a refrigerator 1, and a fixed stopper 47 is provided on either the entrance frame 3 or the door 11.
An engaging member 35 is provided on the other side, and the engaging member 35 has a contact portion 37 that contacts the first contact surface 50 of the fixed stopper 47 when the door 11 is closed, and a contact portion 37 that contacts the first contact surface 50 of the fixed stopper 47 when the door 11 is closed. At times, a regulating portion 38 that can come into contact with a second abutting surface 51 of the fixed stopper 47 opposite to the first abutting surface 50 is provided, and the engaging member 35 is Contact part 3
7 can make contact and the regulating part 38 is retracted, and the contact part 37 is in contact with the fixed stopper 47.
Closing of a sliding door of a refrigerator, characterized in that the sliding door of the refrigerator is provided so as to be retractable to a post-engagement position B where the regulating part 38 abuts, and a pressing member 43 that presses against each position. Device.