JPS6065879A - Automatic door closing apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an automatic door-closing device for a door installed in a prefabricated low-temperature refrigerator, and more particularly to an automatic door-closing device that softens the impact of the door when the door is closed.

(b) Prior art Below, the automatic door closing device of Japanese Patent Publication No. 52-30920 (
(hereinafter referred to as a conventional example) will be explained.

The conventional example includes a mounting frame fixed to the upper end of the door, an L lever with one end of the short side pivoted to this mounting frame, a piston shaft mounted at the bending point of the L lever, and the lower end of the cylinder mounted. Each piston is rotatably attached to the frame, and is equipped with a dashpot, etc., which suppresses the piston downward by a spring provided in the cylinder, and when opening the door, the L lever is pressed by a hook grate attached to the wall frame. When the L lever is rotated against the spring, the axis of the bending point of the L lever connects the mounting frame with the two pivot points of the cylinder and the L lever - it is locked once it passes the dead center on the straight line. Also, when closing the door, rotate the L lever in the opposite direction using the hook plate just before the door closes.
When the axis of the lever bending point exceeds the dead center and returns due to the spring, this is an automatic door-closing device that applies a Darashi-hont, which slows down the closing speed of the door just before the door closes, making the door quiet. Can be closed.

However, as shown in Figure 1 (the automatic door closing device (1)
) is installed vertically to prevent oil leakage from inside the cylinder, considering durability, etc., and its installation position is at the upper end of R (3) provided in the prefabricated low temperature refrigerator (2). . Therefore, the fastening force at the bottom of the door is weak, and in order to strengthen this fastening force, it is necessary to provide, for example, a locking fitting (4) in the center of the door that is separate from the automatic door closing device (1). In addition, when the handle (4) is not formed on the locking metal fitting (4), an automatic door closing device (1) is installed in order to open the door from the outside.
), it was also necessary to attach the handle to the appropriate location on the door, and along with the installation of another locking metal fitting, the door installation work became extremely complicated and the number of parts increased, leading to an increase in manufacturing costs. . Furthermore, it is necessary to separately provide doors that require an automatic closing device and doors that do not, making it impossible to maintain consistency in manufacturing operations.

e-1 Purpose of the Invention The present invention not only significantly reduces the impact and impact noise when the door is closed, but also has an automatic door-closing device installed at an appropriate location such as the center of the side edge of the door to ensure the fastening of the door. It is possible to attach
The purpose is to reduce the number of parts and improve work efficiency by attaching a handle to the automatic door-closing device and eliminating other locking fittings, thereby reducing the overall manufacturing cost of assembled low-temperature refrigerators, etc. .

B) Structure of the Invention The present invention includes a main body fixed to a door that is formed in a side wall of a prefabricated low-temperature refrigerator to open and close the opening, and a main body that is attached to an appropriate position on the side wall facing the main body and locked with the main body. An automatic door-closing device that automatically closes the door when the door is closed, comprising: a main body provided with a suppression device and a handle; and a main body fixed at a suitable position around a side wall opening and abutting the main body at a tip. The automatic door-closing device is composed of a receiving bracket with a locking portion that is locked when the two parts come into contact with each other, and the automatic door-closing device can be installed in an appropriate position on the door to eliminate shock when the door is closed. In addition to ensuring the fastening of the door, other locking hardware is eliminated to reduce the number of parts and improve work efficiency when installing the door, reducing overall manufacturing costs for assembled low-temperature refrigerators, etc. It was planned.

(E) Example Hereinafter, an example of the present invention will be explained based on FIGS. 2 to 5. 1゜(2) is an assembly type low temperature construction constructed by connecting a plurality of heat insulating walls (2). In the warehouse, an opening (5) formed in the side wall (2a) is closed by a door (3) that can be opened and closed. (6), (
The force is provided by vertically moving members attached to the upper and lower parts of the -side edge of the door (3), and the vertically moving member (6), which engages with the force, is attached to the -side edge of the opening (5). Engagement members (8), (9
) is the mounting slot n(゛・ru. Also, Ql is the automatic door closing device according to the present invention (hereinafter referred to as the door closing device of the present invention), and the door (3
) and the main body (IOA) fixed to the side edge of the main body (IOA).
10A) and +I: I 1 I 1 I RO l agony \ 1 1 day 1 1 sea ridge power 1 term Nrr field 2 puller insult metal fittings (IOB). The main body (10A) has a rod 0z and a rod α that exert force in the extending direction, that is, in the direction indicated by the arrow in Fig. 4.
One end of 2 is formed into an abbreviated-shaped pressing device (14), which is a gas spring composed of a cylinder 03) inserted into the interior and injected with a gas such as nitrogen gas.
14j, that is, the tip of the rod a21, and one end, that is, the tip of one arm (15A), are rotatably locked by the rod pivot pin (16), and the other end, that is, the tip of the other arm (15A)
The arm lever 051 has a rotatable roller (2) made of, for example, hard resin attached to the tip abutment part of the arm lever 05) by means of a roller pivot pin (R), and one arm of the arm lever 05) (
15A) and the pressing device 04), and one end of the suppressing device α4), that is, the tip of the cylinder α3) and the approximate center of one arm (15A) of the arm lever 09 are connected to the cylinder pivot pin (17) and the arm lever pivot. A base (19A) is rotatably supported via a pin (18) and is attached to the outer side edge of the door (3).
) is fixed with screws (A)...... case member a9, and this case member (with screws (211 (2υ)
It consists of a handle fixed by a handle. or,
The receiving bracket (IOB) has a side wall (2a) in which an opening (5) is formed.
) is fixed to the support member (24) by screws (23), (23), and the bottom part (26 ) has a locking piece extending obliquely toward the door (3) 6)
The locking member (27) is formed with a locking member (27).

Hereinafter, the operation of the door closing device of the present invention will be explained.

When the closed door (3) is pulled open by the two handles, the roller ■ is held in the locking member (27) of the receiving bracket (JOB) and supports the arm lever pivot pin 08. As A, the arm lever (15) rotates as shown by the arrow while pushing the rod (12+) into the cylinder (131) against the pressure of the cylinder (13).As the arm lever (15) rotates, The rod pivot pin (16) also rotates in one direction, and the rod pivot pin (16) is attached to the dotted line (2!J) connecting the arm lever pivot pin (181) and the cylinder pivot pin (I7). When the point (29) is exceeded, the engagement member (27) of the interlocking bracket (IOB) and the roller (11) are disengaged and JjP (
31 is in an open state. In addition, when the arm lever (151) rotates, the rod pivot pin a6) crosses the dead center (29)y, and the roller...) comes off from the bracket (IOB), and the roller (151) comes off the end face of the door (3). (The machine stops when it comes into contact with 31.

Also, when closing the door (3) from the open state, the door (3)
The rotation of the roller (locking piece of the IOB)
26), the arm lever (151) rotates against the pressure of rod a2, which is the opposite to when opening the door (3), and the rod pivot pin (16) rotates to the other side, reaching the dead center. (29), the arm lever (15) automatically rotates by pushing the rod in the direction of the arrow, and the roller (8) of the main body (10A) is rotated automatically.
) enters the locking member (5), and ! (3) automatically rotates and is reliably closed by the pressure of the rod σ2 of the spring member (9).

Therefore, there is no need to forcefully press the door to close it like with a general latch, or to close the door while operating the engagement part of the latch, but simply press the door (3) lightly. The door (3) can be reliably closed by the pressing force along the pressing device 0, and the contact engagement between the roller (R) of the knife body (IOA) that closes the door (3) and the receiving metal fitting (IOEI) When this starts, the closing speed of the door (3) becomes extremely slow due to the pressure of the rod (12) caused by the rotation of the arm lever 09. For example, when the door (3) is closed by hand (
3) and the side wall (2a), injury to the hand can be reliably prevented. .

Furthermore, the stroke of the rod of the pressing device (14) is thick (rod pivot pin (L6) and arm lever pivot pin (18).
(If the distance between The tightening force can be applied to the center of the edge of the door (3).
The door (3
) can be prevented from twisting, drum-shaped, etc., and the entire door (3) can be held securely closed, M= (3)
(22 is the main body (10A)
Since it is fixed to the case (19) of the door (3), it is easy to open and close the door (3) from the handle I/C, and there is no need to attach a locking fitting or a handle to the door closing device of the present invention. It is possible to significantly reduce the number of fτB products and the installation work time, and it is possible to achieve a comprehensive reduction in manufacturing costs.

In addition, the automatic door-closing device of the present invention can be installed in one unit by standardizing the structure of the conventional locking metal fittings, and the door and locking metal fittings to which the automatic door-closing device of the present invention is attached can be removed. By making the door compatible with other doors, the manufacturing cost of the door can be reduced by -1-.

Incidentally, by providing the automatic door closing device according to the invention on the door of a general storage room or building, the same effects as in the above embodiment can be obtained.

Also, the pressing device α4)'a? Rod 02) and cylinder α3
) and attach cylinder α3 to rod pivot pin 0(j).
) is rotatably connected to the end of the cylinder pivot pin (17).
) The end of the rod (121) can be pivotally mounted to obtain the same effect as in the above embodiment.Furthermore, the same effect can be obtained by using a suppressing device that exerts a pressing force by the force of a spring or the like. In addition, by using another suppressing device that applies a force in the pulling direction to the suppressing device α4), the arm 1/bar housing 5) side light end of the other pressing device is connected to the arm lever a9. The end of the arm lever (15) on the rod pivot pin α6) side is rotatably connected to the appropriate position of the case member (L9), and other pressing devices Even if the handle is attached to the main body using the pulling force of the handle, the same effect as in the above embodiment can be obtained.

(f) Effects of the Invention The present invention includes a locking device fixed to a door and equipped with a suppression device, and a receiving metal fitting provided on a side wall that engages with a part of the main body when the door is struck, A handle is provided in advance on the main body of the automatic door-closing device that closes the door quietly and automatically by the force of the pressing device when the main body and the receiving metal fitting come into contact and engage with each other. , the automatic door closing device Z can be installed at the appropriate location on the door and side wall to ensure the fastening of the door, and other locking fittings are eliminated to reduce the number of parts and work time. It is possible to reduce overall manufacturing costs.

[Brief explanation of the drawing]

Fig. 1 shows a conventional example, Figs. 2 to 5 show an embodiment of the present invention, Fig. 1 is a partial perspective view of an assembly type low temperature refrigerator equipped with a conventional automatic door closing device, and Fig. 2 is a main A partial perspective view of a prefabricated low-temperature refrigerator equipped with an automatic door-closing device according to the invention, FIG. 3 is a front view of the automatic door-closing device main body when the door is opened, and FIG. 4 is the automatic door-closing device main body shown in FIG. 2. FIG. 5 is a cross-sectional view of the main parts of a prefabricated low-temperature refrigerator equipped with the same structure as FIG. 4 when the door is closed. (2)...Assembled low temperature storage, (2)...Insulating wall,
(3)...door, (5)...opening, ←Q...automatic door closing device, (10A)...main body, (IOB)...
Bracket, 04)...Press device, (15)...Arm lever, α9...Case member, 02...Handle,
06...Locking part.

Claims (1)

[Scope of Claims] 1. A main body equipped with a suppression device fixed to a door that freely opens and closes an opening formed in a side wall of a prefabricated low-temperature refrigerator constructed by connecting a plurality of heat-insulating wall bodies; , a receiving metal fitting fixed to a proper position on a side wall corresponding to the main body and engaging with a part of the main body, and when the door is closed, the main body and the receiving metal fitting come into contact with each other and the force of the suppressing device is applied. An automatic door-closing device for silently and automatically closing the door, wherein the main body includes a handle used for opening and closing the door. 2. The main body includes the suppressing device, an arm lever that is rotatably pivoted at a suitable position to one end of the suppressing device and has an abutment portion formed at an outer tip to engage with the receiving fitting, and the arm lever and The present invention is characterized by comprising a case member that covers the pressing device, supports the other end of the pressing device and the arm lever so that they can rotate at appropriate positions, is fixed to the handle car, and is fixed at appropriate positions around the outer surface of the door. An automatic door closing device according to claim 1.