JPH0581702B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a lid opening device for an underfloor storage, which is mainly used as a lid for opening and closing tatami mats, and more specifically, to an opening device for opening the lid of an underfloor storage, which is mainly used as a lid for opening and closing tatami mats. The present invention relates to a technique for improving the impact resistance and assemblability of a structure for lifting the lid while preventing the structure from getting in the way when the lid is closed, etc., and for reducing costs.

[Background Art] Conventionally, Japanese-style underfloor storage has been proposed in which the opening of the underfloor storage main body is opened and closed using a tatami mat as a lid. The problem is that it requires a lot of effort. A possible solution to this problem is to forcibly lift the lid to a certain height using a forced lifting means such as a push-up bar, thereby making subsequent lifting of the lid easier. In such forced lifting means, the forced lifting means remains elevated even after the lid is lifted, which obstructs the storage and removal of items, and also requires an operation to lower the forced lifting means when closing the lid. , there is also a problem of poor operability. In addition, the forced lifting means employs a mechanical means that decelerates the high-speed rotational output of the motor using a reduction mechanism that combines many reduction gears, and mechanical means that uses many reduction gears can easily be damaged by impact. There were problems such as gears being chipped, resulting in low impact resistance, and assembly being time-consuming and costly.

[Object of the Invention] The present invention has been made in view of these problems, and its purpose is to forcibly drive and lift a heavy lid at the beginning of its opening, thereby making it easier to open the lid. However, this forced lifting structure does not get in the way, making it easy to store and take out items, and close the lid easily. In particular, it is an object of the present invention to provide an underfloor storage lid opening device that has improved impact resistance and ease of assembly, and can reduce costs.

[Disclosure of the Invention] The underfloor storage lid opening device of the present invention includes a lid 2 that is rotated to open and close at an opening of an underfloor storage main body 1.
A forced lifting means 3 is provided to lift and rotate the lid to a certain height at the beginning of opening, and when the lid 2 lifted by the forced lifting means 3 is lifted higher than the forced lifting position, the lid for the forced lifting means 3 is provided. A lid load detection means 4 is provided to detect the disappearance of the load of the lid 2, and the lid load detection means 4 detects when the lid 2 is forcibly lifted by the means 3.
In the underfloor storage lid opening device, the underfloor storage lid opening device is provided with a return means 5 that lifts the push-up bar 6 of the forced lifting means 3 and sinks it to the standby position based on the detection result that the load disappears. It is characterized by being composed of a pump 51, an air bag 52 that is inflated by the air pumped by the air pump 51, and a push-up rod 6 that is pushed up by the inflated air bag 52. By having this configuration, the above object has been achieved. In other words, when the lid 2 starts to open, the forced lifting means 3 lifts the lid 2 to a certain height.
Although the lid load detection means 4 can be easily opened even if the lid is
By providing a return means 5 that lifts the push-up bar 6 of the forced lifting means 3 and sinks it to the standby position based on the detection result that the load of the lid 2 on the forced lifting means 3 has disappeared, the forced lifting means 3 When the lid 2 which has been lifted up to a certain height is lifted above that height, the push-up bar 6 of the forced lifting means 3 can be lifted and returned to the standby position based on the detection result by the lid load detection means 4, and the lid 2 can be lifted up to a standby position in this way. By returning the push-up bar 6 to its original position when it is wide open, it is possible to easily store and take out items in and out of the underfloor storage without the push-up bar 6 getting in the way. 2
can be easily closed without returning the push-up rod 6. In addition to this advantage, especially in the present invention, the forced lifting means 3 is equipped with an air pump 51, By constructing the air bag 52 that is inflated by the air that is released and the push-up rod 6 that is pushed up by the inflated air bag 52, problems caused by using a mechanical reduction mechanism that combines a large number of gears as in the past can be avoided. Since the expansion force of the air bag 52, which is inflated by feeding pressurized air, is used, there are no problems such as gear chipping, and the cushioning effect of the air bag 52 greatly increases impact resistance. Moreover, since the air bag 52 whose shape is deformable is used without the need for assembling using a large number of gears, the assemblability can be improved and costs can be reduced.

Embodiments of the present invention will be described in detail below based on the drawings.

A tatami T serving as a lid 2 that is rotatably opened and closed at an opening b having an opening area of one tatami of the underfloor storage main body 1
At the end on the rotation center side, the first link 44 is rotatably supported at both ends between the support body 10 attached to the lid 2 side and the support box 11 attached to the underfloor storage main body 1 side. They are connected and constructed. One end of a second link 45, which is longer than the first link 44, is pivotally connected to the lid 2 on the rotation tip side of the pivot connection point a of the first link 44. Connect the other end of the second link 45 to the underfloor storage main body 1
It is slidably connected to a horizontally long elongated hole s formed in the roller 12 via a roller 12. The connecting link mechanism 8 is installed in the first
The link 44 and the second link 45 are pivotally connected to each other so as to be rotatable. As the connection link mechanism 8, the second
A link 8a whose one end is pivotally connected in the middle of the link 45, and a first link which is integral with the first link 44
Extending link 8b extending from the end of link 44
The extension link 8b and the link 8a are rotatably connected.
The configuration of the connection link 8 can be modified in various ways.

According to such a configuration, the end of the second link 45, which is longer than the first link 44, is slidably connected to the horizontally elongated hole s formed on the underfloor storage main body 1 side. A connecting link mechanism 8 is connected to the first link 44 to cause the loose end 7 of the second link 45 to move toward the rotation center of the elongated hole s as the first link 44 rises and swings. By pivotably connecting the second link 45, it is possible to open the closed lid 2 as shown in FIGS. 3a, b, and c.
As shown in FIG. 4, as the first link 44 rotates upright, the loose end 7 of the second link 45, which is longer than the first link 44, moves along the long hole s to the center of rotation. The second link 45 travels to the side and the second link 45 due to this travel
By the rising rotation of the lid 2, the lid 2 is lifted substantially parallel in the initial stage of lifting, thereby avoiding the edge of the lid 2 from being strongly rubbed against the edge of the opening b, and preventing damage to the lid 2 during opening and closing. There is no such thing. The connecting link mechanism 8 suppresses swinging of the long second link 45 and allows the opened lid 2 to be stably held without shaking.

A gas spring 13 as an example of the holding means 9 is interposed between the support body 10 of the lid 2 and the support box 11 of the underfloor storage main body 1, and the lifting and rotation of the lid 2 is controlled by a light force. The opening/closing rotation position can be maintained so that the opening/closing rotation position can be maintained. Such a gas spring 13 seals high-pressure gas in a cylinder tube 14, movably inserts a piston (not shown), connects a piston rod 15 to the piston, and opens and closes a valve formed on the piston. Therefore, the gas pressure in the gas chamber on the bottom side pushes up the piston rod 15 to lightly lift the lid 2, and by applying a downward force above a certain level, the piston rod 15 can be inserted into the cylinder tube 14 and the lid 2 can be lightly pushed down. This is how it was done. A well-known gas spring 13 is used. The valve operation of the piston is preferably linked to the lifting and pressing down of the lid 2.

In the embodiment, a gas spring is used as the holding means 9, but it goes without saying that other structures may be used.

In the above configuration, the present invention provides a forced lifting means 3 that lifts and rotates the tatami mat T serving as the lid 2 to a certain height at the beginning of opening. Lift the lid 2 to a certain height, and
Even if the lid 2 is heavy, the subsequent opening operation can be performed easily.Furthermore, in the present invention, the lid 2 that has been lifted to a certain height by the forced lifting means 3 is lifted by the forced lifting means 3. 3, the push-up bar 6 of the forced lifting means 3 automatically descends to the lifting standby position, and the push-up bar 6 of the forced lifting means 3 is automatically lowered to the lifting standby position, and the push-up bar 6 of the forced lifting means 3 is automatically lowered to the lifting standby position, and the push-up bar 6 of the forced lifting means 3 is automatically lowered to the lifting standby position, and the push-up bar 6 of the forced lifting means 3 is automatically lowered to the lifting standby position. The rod 6 does not get in the way and there is no need to return the push-up rod 6 when closing the lid 2. In addition, in the present invention, as the forced lifting means 3, pressurized air is used. By using an air bag 52 that is inflated by pressure feeding, the air bag 52 exhibits a buffering function and greatly increases impact resistance, and also improves ease of assembly and reduces costs. The specific configuration will be explained in detail below.

FIG. 5 shows a detailed view of the forcible lifting means 3, in which the forced lifting means 3 is attached to the upper edge of the opening b on the side opposite to the center of rotation of the lid 2. The casing 16 of the forced lifting means 3 is composed of a back plate 17 and a casing main body 18 having a substantially U-shaped cross section.
Opening edge 5 of a bag-shaped air bag 52 with an open bottom at
The air bag 52 is opened and attached to the bottom of the casing main body 18 by pressing the air bag 2a in an airtight manner. A piston 20 having a smaller diameter than the inner diameter of the casing 16 is brought into contact with the approximate center of the upper piece 52b of the air bag 52 from above, and a piston retainer 21 is disposed inside the air bag 52 so as to face the piston 20. The air bag 52 and the piston 20 are connected by connecting the piston 20 and the piston retainer 21 with screws or the like. The lower end of the push-up rod 6 is inserted and connected to the piston 20 with a rubber plate 22 in between, and the upper part of the push-up rod 6 is slidably inserted into an insertion hole 23 formed in the casing main body 18 via a bearing flange 24. are combined. A through hole 27 is formed in the bottom piece 25 of the casing main body 18 and extends from the outside of the casing main body 18 to the inside of the air bag 52 via a pipe joint 26 . pipe joint 2
6 is connected to a pipe 37 from an air pump 51 arranged outside the underfloor storage main body 1.
However, by operating the air pump 51,
Pressure air from the air pump 51 is transferred to the air bag 52.
The air bag 52 is inflated with the pressurized air, the piston 20 and the push-up rod 6 fixed to the piston 20 are raised, and the push-up rod 6 raises the tatami T serving as the lid 2 above the floor level L. It is designed so that it can be lifted up to a certain height (approximately 10cm).

The push-up rod 6 is formed into a hollow pipe shape.
The lower end opening 28 communicates with a communication hole 29 formed in the piston 20, the air bag 52, and the piston retainer 21, so that a part of the air introduced into the air bag 52 is also forced into the push-up rod 6. It is designed so that A slide hole 31 is provided at the top of the push-up bar 6.
is penetrated through the slide hole 31, and an air release valve body 32 is slidably inserted into the slide hole 31 while keeping it airtight. A pipe-shaped spring receiver 30 is provided inside the push-up rod 6.
A coiled spring 33 is interposed between the spring receiver 30 and the air release valve body 32, and the air release valve body 32 is urged to protrude outward from the slide hole 31 to release the air. The valve body 32 is made to protrude above the upper end of the push-up rod 6. Air release valve body 3
An exhaust hole 34 is formed laterally through the push-up bar 6 portion on which the air release valve body 32 slides. The exhaust hole 34 can be opened by the air release valve body 32 which is pushed inward of the push-up rod 6 against the spring 33 under the load of the tatami mat T serving as the lid 2. I have made it possible. A return spring 36 is interposed between the lower flange 35 of the push-up rod 6 and the upper piece of the casing main body 18. After the lid 2 is forcibly lifted up to a certain height above the floor level L by the push-up bar 6, when the lid 2 is greatly lifted to a certain height, the lid 2 separates from the upper end of the push-up bar 6. Along with this, the air release valve body 32 , which is biased by the spring 33 , slides in the slide hole 31 to open the exhaust hole 34 , and the air inside the air bag 52 is discharged from the exhaust hole 34 . The air is also discharged, the inflation force of the air bag 52 is released, and the push-up bar 6 is automatically lowered by the return spring 36, so that the push-up bar 6 becomes an obstacle when storing and removing articles from the underfloor storage main body 1. without becoming
Further, when the lid 2 is returned and the underfloor storage is closed, the push-up bar 6 is arranged so as not to get in the way.

Note that the operation of the air pump 51 may be stopped in conjunction with the air release valve body 32 protruding from the push-up rod 6. The air release valve element 32, which detects that the load of the lid 2 on the push-up rod 6 is removed, and the spring 33, which biases the air release valve element upwardly, are collectively referred to as the lid load detection means 4.

[Effects of the Invention] In summary, the present invention allows the forced lifting means to lift the lid to a certain height when the lid begins to open, so even if the lid is heavy, such as a tatami mat, the opening operation can be performed easily. Based on the detection result that the load of the lid on the forced lifting means is eliminated by the lid load detection means, a return means is provided which raises the push-up bar of the forced lifting means and sinks it to the standby position. When the lid is lifted to a higher height, the push-up bar of the forced lifting means can be lifted and returned to the standby position based on the detection result by the lid load detection means. Since the push-up bar can be returned to its original position, it is possible to easily store and take out items from the underfloor storage without the push-up bar getting in the way, and the lid can also be closed by returning the push-up bar to its original position. In addition to this advantage, especially in the present invention, the forced lifting means includes an air pump, an air bag inflated by air pumped by the air pump, and an inflated Since it is composed of a push-up rod that is pushed up by an air bag, it avoids the problems caused by using a mechanical reduction mechanism that combines many gears as in the past, and utilizes the expansion force of the air bag that is inflated by feeding pressurized air. Therefore, there are no problems such as gear chipping, the shock resistance can be greatly improved due to the buffer function, and there is no need to assemble using multiple gears, making it possible to eliminate air bags that change their shape. Since it is used, it is possible to improve the ease of assembly, and there is an advantage that the overall cost can be significantly reduced.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of an embodiment of the present invention, FIG. 2 is a schematic front view of the same switching device, and FIG.
Figures a, b, c and 4 are explanatory diagrams for explaining the action of the above, Figure 5 is a front sectional view of the forced lifting means of the same, Figure 6 is a side sectional view of the same, and Figures 7 a and b. 8 is a sectional view showing the action of the air release valve body same as above.
Figures a and b are schematic perspective views showing the return state of the push-up bar in the above forcible lifting means, broken perspective views of the same air bag, and Figures 8c and d show the protruding state of the push-up bar in the above forcible lift means. 1 is a schematic perspective view showing the air bag shown above, and a cutaway perspective view of the same air bag as above, in which 1 is an underfloor storage main body, 2 is a lid, 3 is a forced lifting means, 4 is a lid load detection means, 5 is a return means, 6 is a push-up bar, 51 is an air pump, and 52 is an air bag.

Claims (1)

[Scope of Claims] 1. Forced lifting means is provided for lifting and rotating the lid, which is rotated to open and close at the opening of the underfloor storage main body, to a certain height at the beginning of opening, and the lid lifted by the forced lifting means is provided. Lid load detection means is provided for detecting the loss of the load on the lid relative to the forced lifting means when the lid is lifted higher than its forced lifting position, and the lid load detection means detects the loss of the load on the lid relative to the forced lifting means. In the underfloor storage lid opening device, which is provided with a return means for lifting the push-up bar of the forced lifting means and sinking it to the standby position based on An underfloor storage lid opening device comprising an air bag that is inflated by the air and a push-up rod that is pushed up by the inflated air bag. 2. The return means communicates between the air bag and the inside of the hollow push-up rod, is attached to the push-up rod in a protruding manner via a spring, and closes the exhaust hole when the load of the lid is applied. 2. The underfloor storage lid opening device according to claim 1, further comprising an air release valve element that opens the exhaust hole when the load on the lid is removed.