JPH03212214A - Automatically winding type cover - Google Patents

Abstract

PURPOSE:To ensure the smooth winding of a night cover when drawn out, and the slow winding thereof when stored, and prevent the damage of a fluorescent lamp, a thermostat or the like by supporting one end of a cover winding rod on a fixed member via a one-way type rotary damper for suppressing a winding speed via the application of braking effect on the winding force of a winding spring. CONSTITUTION:One end of a cover winding rod 22 is supported with a one-way type rotary damper 32. The rotary damper 32 does not cause viscous resistance to act in a night cover drawing direction. Consequently, a rotary shaft 33 smoothly rotates and the night cover 3 can be lightly drawn out. When the night cover is wound with the winding elastic force of a spring 27, the rotary shaft 33 rotates in a direction opposite to the aforesaid drawing direction. In this case, for the rotation of the shaft 33 in a rewinding direction, the rotary damper 32 causes the viscous resistance of material contained therein to act on the rotary shaft 33, thereby preventing the sudden rewinding rotation thereof. According to the aforesaid construction, the night cover 3 is gradually wound, and a trouble such as fluorescent lamp failure due to an impact can be prevented.

Description

Detailed Description of the Invention (a) Industrial Application Field The present invention is suitable for use in shielding the front opening of an open showcase for heat insulation or as a window curtain. Regarding automatic retractable covers.

(b) Conventional technology Many open showcases are equipped with a cover that is lowered over the front opening at night after closing to save energy during cooling operation, and also to prevent sunlight from entering the windows of houses while fishing on boats. Some rooms are equipped with curtains, etc. These covers and curtains are generally designed to be automatically rolled back and stored after the drawer is extended and used. The automatic winding type cover mechanism is disclosed in, for example, Japanese Utility Model Publication No. 61-6825. In other words, the winding core 1 fixedly supported on the case 10
4, the winding shaft 11 is rotatably supported around the winding shaft 11. A winding force is applied to the winding shaft 11 by a coiled spring 21 inserted between them. When the net 2 is stored, the winding shaft 11 automatically rotates to wind up the net 2 due to the elastic force of the spring 21 in the winding direction. It has become.

Further, FIGS. 2 to 6 show the structure of an automatic wind-up type cover called a night cover provided in the open showcase. That is, as shown in FIG. 2, during non-business hours at night or on holidays, the front opening 2 of the open showcase 1 is covered by a plurality of night covers 3 that are pulled down from the top. This allows the front opening 2
The air curtain of cold air that is formed is less affected by the temperature of the outside world, and the inside of the refrigerator can be maintained at a low temperature with a weak cooling operation, resulting in energy savings. FIG. 3 shows the external structure of the upper part of the open showcase while the tee 1 cover is being pulled out, and FIG. 4 shows the structure of the lower part of the open showcase viewed from inside. In each figure, the open showcase 1 has a cold air passage (not shown) formed in its main body part IA so as to surround the outside of the interior 4 of the refrigerator, and the air inside the refrigerator is sucked in from the lower part of the interior 4 of the refrigerator. The cold air passes through the cold air passage located behind the back plate 5 and the top plate 6, and is discharged downward from the outer and inner cold air discharge lowers and 8 provided at the front of the top plate 6, creating a double air curtain inside the refrigerator. It is formed in the front opening 2 of 4 and 3-.

Of course, an evaporator, a cold air circulation fan, etc. (not shown) are disposed in the cold air passage to circulate cold air. The night cover shown in figure 3 is made of a tingling and soft sheet-like film member, and is normally rolled up (during business hours) and stored in the night cover attachment part 10. At times such as 1), it is pulled out downward and its lower end is appropriately attached and fixed so as to cover the front opening 2.

A satchel 11 is attached to the lower end of the night cover 3,
It is provided with a locking part 13 with a hole 12 which also serves as a handle for pulling down. On the other hand, a handrail 15 is attached to the top of the lower front wall 14 of the open showcase main body part IA in the longitudinal direction, and the night cover 3 pulled down is fixed to the back side of the handrail 15. A protruding locking portion 16 for hooking the locking component 13 is provided. Reference numeral 17 denotes a fluorescent lamp for illuminating the interior of the refrigerator installed adjacent to and outside the night cover 3, and 18 denotes a cover for the fluorescent lamp. Further, in the front end portion 20 of the wall 19 of the upper body 4 near the fluorescent lamp 17, an electrical component storage area, such as an internal recess, is formed, and although not shown in the figure, there is a fluorescent lamp switch and a chamber temperature adjustment area. A thermostat knob etc. are provided. The night cover 3 described above is configured to be automatically rolled up when not in use (during non-business hours). The conventional structure will be explained with reference to FIGS. 5 and 6 showing the conventional structure. In each turn, the winding body 21 around which the night cover 3 is wound is closed and fixed to the hollow cylindrical cover winding frame 22 that fixes the upper end of the night cover 3, and to the openings at both ends of the cover winding frame 22. The left and right end covers 23 and 24, which are in a loose relationship with the left end cover 23, and the winding core 25, which is inserted halfway into the cover winding frame 22, and the winding core 25, which is inserted halfway into the cover winding frame 22, are It is wound around the outer periphery, and the right end is fixed to the outer surface of the winding core 25,
It consists of a winding spring 27 whose left end is locked in a locking groove 26 of the left end cover 23 to constantly urge the cover winding rod 22 to rotate in the winding direction. Therefore, the cover wrapping frame 2
2 is in a relationship of freely rotating with respect to the winding core 25.

Reference numeral 10 denotes a night cover attachment part to which the cover winding body 21 is attached and supported, and is fixed to the upper wall 19 of the main body with a suitable attachment part such as a screw. A square fixing hole 28 is provided in the left fixing wall 10A of the night cover attachment part 10.

A square fixing shaft 25A protruding from the left end of the winding core 25 of the winding body 21 is fitted into the fixing hole 28, and the screw 29
It is completely fixed to the left fixed wall 10A. On the other hand, a free shaft 30 is protruded from the right fixed wall 10B of the night cover attachment part 10, and a shaft hole 31 formed in the right end cover 24 of the winding body 21 is loosely engaged with the free shaft 30. Allows free rotation. Therefore, with this configuration, the cover winding frame 22
is mounted and supported on the night cover attachment part 10 via the left and right end covers 23 and 24 so as to be able to rotate freely relative to the winding core 25. Further, the night cover 3 whose upper end side is fixed to the cover winding frame 22 has a sash 11 on its lower end side, and a hole 12 is provided approximately in the center of the sash 11.
It has a bright locking part 13. Therefore, when closing the front opening 2 of the showcase main body IA, this locking part 13
is used as a handle to pull it downward with a force greater than that of the winding spring 27, and it is hooked onto the case side locking part 16 near the handrail 15 and stopped. When not in use, when the night cover is removed from the case side locking part 16, the night cover is automatically wound upward by the elasticity of the winding spring 27.

(c) Problems to be Solved by the Invention However, in the above-described conventional structure, first, if the force of the winding spring is weak, winding cannot be performed properly. In other words, if there is dew on the night cover, it will be difficult to wind it up, but it is necessary to adjust the force of the spring to be strong so that it can be rolled up in this situation. The adjustment is not done by changing springs with different elasticities, but by changing the rotational position of the fixed shaft and the left end cover of the winding rod, as shown in Figure 6, in other words, how many rotations are needed to fix it. Takes time and effort. Also, if the force of the winding spring is strong, the sash at the bottom of the night cover will suddenly pull up when storing the night cover after use.
It may damage the fluorescent light on the top of the case, or hit the fluorescent light switch or thermostat knob that is normally installed nearby.
This may lead to problems such as damage or misalignment of temperature settings. One way to prevent this problem is to slowly move the sash at the bottom of the night cover upwards to the attachment point without letting go of your hand, but this work is cumbersome and inefficient.

The present invention was developed in view of the above points, and the night cover is rolled up smoothly when pulled out and slowly rolled up when stored, making it easy to use and preventing damage to fluorescent lights, thermostats, etc. The purpose is to provide an excellent automatic winding type cover.

(d) Means for Solving the Problems The present invention provides a winding core that is horizontally supported and fixed to a fixed member;
A hollow cylindrical cover winding rod is rotatably supported around this winding core, and the upper end side is fixed to this cover winding rod and is extended by pulling out the lower end, and an appropriate fixing part is attached to the cover winding rod. An automatic winding type comprising a cover member that performs a shielding effect when locked to the cover member, and a winding spring that applies a biasing force in the winding direction to the cover mounting rod to automatically wind up the cover member. In the cover, one end of the cover winding rod is supported on the fixed member via a one-way rotary damper that applies a braking action to the winding process by the winding spring and suppresses the winding speed. It is something.

(E) Function One end of the cover wrapping rod has a bearing mechanism that rotates freely as in the past, but the other end has a one-way rotary damper between the end cover of the cover wrapping rod and a one-way rotary damper. The rotating shafts are fitted and connected, and both rotate together. Due to the viscous resistance of the substance sealed inside the rotary damper, the movement in one direction is slowed down, so when using the night cover, there is no viscous resistance and the night cover can be pulled out smoothly. Conversely, when storing, the viscous resistance of the rotary damper acts on the winding force of the spring, so the winding is slow.

(F) Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings. Note that parts that are the same or equivalent to the conventional configuration are indicated by the same numbers. FIG. 1 shows a sectional view of an automatic wind-up type night cover of the present invention incorporating a rotary damper. That is, in place of the free shaft 30 that freely rotatably supports the right end cover 24 of the cover wrapping rod 22 in the conventional art, a one-way rotary damper is used as a support structure.

32 is a rotating damper, which has a non-circular rotating shaft 33;
It has a structure that bears this rotating shaft 33, and the movement of the rotating shaft 33 can be slowed down by the viscous resistance of the substance sealed inside. In general, there are dampers that have viscous resistance in both left and right directions, and dampers that have viscous resistance in only one direction, but in the present invention, a one-way rotary damper 32 that has viscous resistance only in one side is used. Non-circular rotating shaft 33
By a connecting means such as fitting into the same non-circular fitting hole 34 formed in the right end cover 24 of the cover winding body 21,
The right end cover 24 and the rotating shaft 33 are configured to rotate together. The upper end of the night cover 3 is fixed to the circumferential surface of the cover wrapping rod 22, and the night cover 3
is wrapped around this cover wrapping rod 22.

With the above configuration, the sushi 1 of the night cover 3
1 by hand and pull it down, the rotary damper 32 does not apply viscous resistance in the pull-out direction, so the rotary shaft 33
rotates smoothly, the night cover 3 is pulled out 1 lightly, and its sash 11 is hooked on the case side locking part 16 to close the front opening 2 of the open showcase main body IA. When the next day's business hours arrive, the locking part 13 is removed from the case-side locking part 16 and the night cover 3 is wound up by the winding elastic force of the winding spring 27. The rotating shaft 33 rotates in the opposite direction to the previous drawing direction. At this time, with respect to the rotation in the unwinding direction, the rotary damper 32 applies the viscous resistance of the substance therein to the rotating shaft 33, thereby preventing sudden unwinding rotation. Therefore, the cover winding rod 22 also rotates slowly, and the night cover 3 is then slowly wound up into the stored state. As described above, the night cover 3 is rapidly wound up using only the winding spring, and the fluorescent lamps 17, etc. are
This will prevent problems such as damage caused by blows. Furthermore, when the night cover 3 is stored, all one has to do is remove the hook from the locking part 13 and then move the cover 11 - thereby saving time and effort.

(G) Effects of the Invention As described above, according to the present invention, in the automatic winding type cover, one end of the cover winding body is supported by a shaft so that it can rotate freely as in the conventional case, but the other end is Since it is supported via a one-way rotary damper that applies a braking force to rotation only in the winding direction, the winding speed can be suppressed compared to the conventional system using only a winding spring.

This prevents the tip end of the cover from rapidly returning to the vicinity of its attachment portion during winding. Therefore, when applied to a night cover for an open showcase, problems such as damage to the fluorescent lamp due to impact from the tip of the night cover can be prevented.

Further, by simply releasing the lock at the lower end of the cover, the cover is slowly rolled up and stored, making it easy to pull out and store the cover, making it easy to use.

[Brief explanation of drawings]

Fig. 1 is a sectional view of an automatic winding cover incorporating a one-way rotary damper according to the present invention, Fig. 2 is a perspective view of the open showcase with the night cover lowered, and Fig. 3 is an external perspective view of the open showcase with the night cover lowered. Figure 4 is a perspective view of the upper part of the open showcase when the night cover is being pulled down using the conventional take-up spring method; Figure 4 is a perspective view of the part that fixes the night cover being pulled down in the open showcase; FIG. 6 is a perspective view of an exploded structure of the automatic wind-up type night cover, and FIG. 6 is a sectional view of the same night cover. 1...Open showcase, 2...Front opening, 3
...Night cover, lO...Night cover mounting parts, 11...Sash, 16...Locking part, 21...
Cover winding body, 22...Cover winding rod, 23, 24
End cover, 25... Winding core, 25A... Fixed shaft, 2
7... Winding spring, 32... One-way rotary damper, 33... Rotating shaft. phrase i)

Claims (1)

[Claims] 1. A winding core supported and fixed horizontally on a fixed member, a hollow cylindrical cover winding rod rotatably supported around this winding core, and an upper end fixed to this cover winding rod. a cover member which is extended by pulling out its lower end and which performs a shielding action by being locked to a suitable fixed part; In the automatic winding type cover, which includes a winding spring that applies a biasing force, one end of the cover winding rod is applied with a braking action to the winding force of the winding spring to control the winding speed. An automatic roll-up type cover, characterized in that the cover is supported on the fixed member via a one-way rotary damper.