JP2007029535A - Sheet change bed - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet change bed, which saves time and effort of changing or washing a sheet and sanitary. <P>SOLUTION: A bed mat 1, a sheet supply roll 4 on which a long disposable sheet 16 is wound and which is installed close to the bed mat 1, a sheet feeding device detachably holding the front end of the disposable sheet 16 to allow the sheet to be drawn from the sheet supply roll 4 for covering the upper surface of the bed mat 1 and a cutting device 6 by which the pulled disposable sheet 16 is cut between the sheet supply roll 4 and the bed mat 1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a sheet exchange bed capable of automatically covering a bed mat with a new sheet.

In order to obtain a comfortable sleep, it is necessary to frequently change the sheets covering the bed mat and keep them clean. At present, bed sheets are generally exchanged manually.
However, because the bed mat is thick and heavy, it takes a lot of force to cover the top surface with a sheet and insert the periphery of the sheet under the bed mat, and many beds are installed like hospitals and hotels. It was hard work to spread the sheets in a state where they were stretched out so as not to have wrinkles.

Therefore, as a device for automatically changing sheets, a long sheet is wound around a supply roll, sheets are supplied from the supply roll one by one and laid on a bed mat, and used sheets are collected on a collection roll. An automatic sheet changing bed for rewinding has been proposed (see Patent Document 1 and Patent Document 2).
However, the used sheets that have been rewound on the collecting roll are left in close proximity to the bed until all the long sheets are used up, so that they are not very hygienic and they remain dirty for a long time. Therefore, it will be difficult to remove dirt even after washing.

Japanese Utility Model Publication No. 60-103363 Japanese Patent Publication No. 2-30247

  The problem to be solved by the present invention is that the upper surface of the bed mat can be automatically covered with a new disposable sheet, and it is possible to save the trouble of sheet replacement and washing. It is to provide a hygienic bed changing bed because it can be removed immediately from the vicinity.

  The sheet exchange bed of the present invention includes a bed mat, a long disposable sheet, and a sheet supply roll installed adjacent to the bed mat, and a tip of the disposable sheet wound around the sheet supply roll. A sheet pulling device that detachably grips and pulls the gripped disposable sheet from the sheet supply roll and covers the upper surface of the bed mat, and the disposable sheet drawn by the sheet pulling device, the sheet supply roll and the bed mat, And a cutting device for cutting between the two.

A fixed frame may be arranged around the bed mat so as to be movable up and down, and when the fixed frame descends, the peripheral portion of the disposable sheet covering the upper surface of the bed mat may be pressed and fixed with the fixed frame.
In this case, the sheet supply roll and the sheet drawer device are attached to the fixed frame, and when the fixed frame is raised, the disposable sheet drawn from the sheet supply roll by the sheet drawer device is higher than the upper surface of the bed mat. It is desirable to be in The cutting device may cut the disposable sheet after the fixed frame descends and presses the disposable sheet.
The sheet drawer device may have a pair of gripping portions that can grip both sides of the distal end portion of the disposable sheet and can slide in both directions of the bed mat in a direction crossing the sheet supply roll.

According to the first aspect of the present invention, since the bed mat is automatically covered with the sheet, labor required for the sheet replacement can be saved.
In addition, since the used cut sheets can be immediately removed from the vicinity of the bed, it is hygienic and does not require the labor of washing the used sheets.
According to the invention which concerns on Claim 2, the disposable sheet | seat which covers the upper surface of a bed mat can be tensioned and can be tensioned, and it can prevent that a disposable sheet | seat remove | deviates or loosens at the time of use.

According to the third aspect of the present invention, when the fixed frame is raised at the time of sheet replacement, the sheet supply roll and the sheet drawer device are also raised, so there is no fear that the disposable sheet drawn from the sheet supply roll will be caught on the bed mat.
According to the invention which concerns on Claim 4, it can cut | disconnect reliably in the state which pulled and tensioned the disposable sheet.
According to the invention which concerns on Claim 5, it is possible to grasp the both sides of a disposable sheet and to draw it to the exact position on a bed mat.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
As shown in FIGS. 1, 2, and 6, the sheet exchange bed according to the present invention includes a bed mat 1 and bases disposed on both sides of the bed mat 1 along the longitudinal direction (hereinafter referred to as the front-rear direction). The frame 2, the fixed frame 3 disposed so as to surround the periphery of the bed mat 1 above the base frame 2, and adjacent to the bed mat 1 are disposed on one end side in the longitudinal direction (hereinafter referred to as the front side). A sheet supply roll 4, a sheet drawer device 5 installed on each side of the bed mat 1 and attached to the fixed frame 3, and a cutting device 6 disposed between the bed mat 1 and the sheet supply roll 4. And a cover 7 disposed around the bed and covering the devices.

The bed mat 1 has the same structure as that used for an ordinary bed, and is installed on a bed base (not shown).
As shown in FIG. 2, the base frame 2 is slightly longer than the bed mat 1, and is disposed in a lower side portion of the bed mat 1 in parallel with the side surface of the bed mat 1.
As shown in FIG. 3, storage grooves 8 are formed on the upper surface of the base frame 2 along the front-rear direction, and ball screws 9 are stored in the storage grooves 8, respectively. The front end of each ball screw 9 is engaged with a drive ball screw 10 installed between the front ends of the base frame 2.

The central portion of the drive ball screw 10 is connected to the output shaft of the first motor 12 via the gear box 11, and when the first motor 12 is driven to rotate the drive ball screw 10, both sides engaged with the drive ball screw 10 are engaged. The ball screws 9 are rotated in opposite directions.
Further, a support base 13 is screwed into both ends of each ball screw 9, and when the ball screw 9 rotates, the front and rear support bases 13 move in opposite directions along the ball screw 9.
Further, as shown in FIGS. 2 and 8, the lower end of the swing arm 14 is pivotally attached to each support base 13, and one end of the support arm 14 ′ is pivotally attached to the intermediate portion of the swing arm 14. The other end of the support arm 14 ′ is pivotally attached to the end of the base frame 2.

The fixed frame 3 is a hollow frame in which a space having the same shape as the bed mat 1 is formed at the center. As shown in FIGS. 4 and 5, a sheet drawer device is provided inside each side of the fixed frame 3. 5 is stored.
As shown in FIGS. 2 and 8, the upper end of the swing arm 14 is pivotally attached to the front and rear sides of the lower end of the fixed frame 3, and the support base 13 in the base frame 2 moves in both directions along the ball screw 9. When moved, the swing arm 14 is raised and lowered, and as a result, the fixed frame 3 moves up and down.
When the fixed frame 3 is lowered to the lower limit position, the upper surface of the fixed frame 3 is lower than the upper surface of the bed mat 1, and when the fixed frame 3 is raised to the upper limit position, the sheet drawer device 5 housed in the fixed frame 3. Becomes higher than the upper surface of the bed mat 1.

The sheet supply roll 4 is rotatably mounted between brackets 15 provided on both sides of the front end of the fixed frame 3, and a long disposable sheet 16 is wound around the peripheral surface thereof.
The disposable sheet 16 is made of paper and has a width that is slightly wider than the distance between the sheet drawing devices 5 on both sides.
Further, when the disposable sheet 16 wound around the sheet supply roll 4 is used up, the sheet supply roll 4 can be removed from the bracket 15 and replaced with a new one.

As shown in FIGS. 4 and 5, the sheet drawer device 5 includes a gripping portion 17 that grips the distal end portion of the disposable sheet 16 and slides inside the fixed frame 3 in the front-rear direction.
The gripping portion 17 is composed of an upper piece 18 and a lower piece 19 whose rear end portions are axially attached. Upper rollers 20 are mounted on the rear and middle portions of both side surfaces of the upper piece 18, and lower rollers 21 are mounted on the rear and middle portions of both side surfaces of the lower piece 19, respectively.
The upper roller 20 and the lower roller 21 are slidably engaged with an inner surface of the fixed frame 3 in an upper guide groove 22 and a lower guide groove 23 formed along the front-rear direction.

In addition, pulleys 24 that are opposed to the front and rear are respectively installed on both sides of the fixed frame 3, and a belt 25 is wound between the front and rear pulleys 24. The rotation shaft of one pulley 24 is connected to the output shaft of the second motor 26 via gears 27 and 28. When the second motor 26 is driven, the pulley 24 rotates and the belt 25 rotates.
Further, the upper piece 18 of the gripping portion 17 is fixed to the lower surface of the belt 25, and when the belt 25 rotates forward and backward and the lower surface slides in the front-rear direction, the gripping portion 17 is located between the front and rear end portions of the fixed frame 3. Is supposed to move.
The second motor 26 is controlled by a limit switch or the like, and automatically operates when the first motor 12 stops. When the gripping portion 17 reaches the front end portion from the rear end portion of the fixed frame 3, the second motor 26 starts reverse rotation. When the gripping part 17 returns to the rear end part, it stops.

A front recess 29 is formed at the front of the bottom surface of the lower guide groove 23, and a rear recess 30 is formed at the rear.
The front recess 29 is slightly shorter than the distance between the front and rear lower rollers 21, and is formed at a distance from the front end of the lower guide groove 23. The cross-sectional shape is a so-called ship bottom shape in which both front and rear end portions are inclined. It has become.
Further, a switching device for switching the track of the lower roller 21 on the front side is installed above the front recess 29. The switching device includes a horizontal piece 31 that divides the front recess 29 from the lower guide groove 23 except for front and rear ends thereof, a front lid 32 that is rotatably attached to the front end of the horizontal piece 31, The rear lid 33 is pivotally attached to the rear end.

The front lid 32 is restricted from turning downward and can only turn upward, and is normally flush with the horizontal piece 31 to block the front end of the front recess 29.
The rear lid 33 is urged upward, and is normally rotated obliquely upward so that the rear end portion of the front recess 29 is opened.
The rear recess 30 is formed at the rear end of the lower guide groove 23 and is slightly longer than the distance between the front and rear lower rollers 21 and is inclined so that the front becomes deeper.

When the gripping portion 17 located at the rear end portion of the fixed frame 3 slides forward (towards the sheet supply roll 4) and approaches the front end portion of the fixed frame 3, first, the front lower roller 21 is inclined upward. After opening, it passes under the lid 33 and enters the inside of the front recessed portion 29, the front end portion of the lower piece 19 is lowered, and the front end portion of the gripping portion 17 is opened.
Next, the front lower roller 21 moves forward while pushing up the front lid 32 and escapes from the front recess 29, so that the front end of the lower piece 19 rises and the front end of the gripping portion 17 closes.
At this time, as shown in the right half of FIG. 4, the front end of the gripping part 17 protrudes from the front end of the fixed frame 3 and reaches the tip of the disposable sheet 16 wound around the sheet supply roll 4. This is gripped and closed. In addition, after the front lower roller 21 has escaped from the front recess 29, the front lid 32 is lowered again and returned to the horizontal state, and the rear lower roller 21 does not enter the front recess 29.

When the gripping portion 17 that grips the disposable sheet 16 starts to retract, the front lid 32 is restricted from rotating downward, so that the front lower roller 21 does not enter the front recess 29 and the front lid 32 and It passes over the horizontal piece 31 and further passes over it while pushing down the rear lid 33 and reaches the rear of the front recess 29.
Accordingly, the lower roller 21 on the front side does not fall below the lower roller 21 on the rear side. As a result, the front end portion of the lower piece 19 does not lower, and the grip portion 17 moves backward while holding the disposable sheet 16.

As shown in the left half of FIG. 4, when the gripping portion 17 reaches the rear end of the fixed frame 3, the lower roller 21 on the front and rear sides enters the rear recess 30. Since it is deep, the front lower roller 21 is positioned below the rear lower roller 21.
For this reason, the front end portion of the lower piece 19 is lowered, the gripping portion 17 is opened, and the distal end portion of the disposable sheet 16 is opened.

The cutting device 6 is installed between the bed mat 1 and the sheet supply roll 4 on the upper part of the support frame 34 disposed along the width direction (FIG. 2).
As shown in FIGS. 6 and 7, the cutting device 6 includes a driving pulley 35 and a driven pulley 36 installed on both sides of the upper portion of the support frame 34, and a belt 37 wound around the driving pulley 35 and the driven pulley 36. And a third motor 38 for driving the drive pulley 35, a slide base 39 fixed to the upper surface of the belt 37, a rotary blade 40 and a fourth motor 41 installed on the upper surface of the slide base 39.

The third motor 38 is installed below the drive pulley 35, and the drive pulley 35 and the third motor 38 are connected via the transmission belt 42. Therefore, when the third motor 38 is driven, the drive pulley 35 rotates. Then, the belt 37 wound around the drive pulley 35 and the driven pulley 36 rotates along the width direction of the bed, the slide table 39 fixed to the belt 37, the rotary blade 40 installed on the upper surface, and the fourth The motor 41 moves in the width direction.
Note that the rotation amount of the third motor 38 is controlled so that the slide base 39 is always positioned on the upper surface of the belt 37 and moves in the forward and reverse directions between one end and the other end in the width direction of the bed.

The rotary blade 40 is installed so that the disposable sheet 16 crosses the height of the intermediate portion of the rotary blade 40 when the fixed frame 3 is at the lower limit position.
Further, the rotary shaft of the rotary blade 40 extends in the front-rear direction, and the rotary shaft and the output shaft of the fourth motor 41 are connected by the timing belt 43 so that when the fourth motor 41 is driven, the rotary blade 40 rotates. It has become.
The fourth motor 41 is controlled to be driven only when the slide base 39 moves forward from one end to the other end in the width direction of the bed.

Hereinafter, a sheet laying process using the sheet exchange bed will be described.
As shown in FIG. 2, the sheet supply roll 4 around which the disposable sheet 16 is wound is installed between the left and right brackets 15 in a state where the fixed frame 3 is lowered. A distal end portion of the disposable sheet 16 wound around the sheet supply roll 4 is guided by a guide tool as appropriate and protrudes backward.
Next, when the first motor 12 is manually operated to rotate the drive ball screw 10, the left and right ball screws 9 rotate reversely and the front and rear support bases 13 approach the end of the base frame 2.

Then, as shown in FIG. 8, the support arm 14 ′ stands up to push up the swing arm 14, and as a result, the fixed frame 3, the sheet drawer device 5 attached to the fixed frame 3, and the sheet supply roll 4 rise. To do.
When the fixed frame 3 rises to the upper limit position and stops, the second motor 26 is automatically actuated to move the belt 25. As a result, the gripping portion 17 fixed to the belt 25 is moved to the rear end portion of the fixed frame 3. Moves forward and approaches the sheet supply roll 4. When the gripping portion 17 reaches the front end portion of the fixed frame 3, the lower piece 19 of the gripping portion 17 is once opened and then closed, and the top end portion of the disposable sheet 16 is gripped by the upper piece 18 and the lower piece 19.

Next, the second motor 26 rotates in the reverse direction, and the gripping part 17 moves backward while gripping the disposable sheet 16, and the disposable sheet 16 is pulled out from the sheet supply roll 4 as shown in FIG. Cover.
When the gripping portion 17 reaches the rear end portion of the fixed frame 3 and the upper portion of the bed mat 1 is completely covered with the disposable sheet 16 as shown in FIG. 10, the lower piece 19 is opened and the gripping portion 17 is moved to the disposable sheet. While opening the front-end | tip part of 16, the 2nd motor 26 stops.
Next, the first motor 12 rotates in the reverse direction when the fixed frame 3 is raised, the drive ball screw 10 rotates in the reverse direction, the left and right ball screws 9 rotate in the reverse direction, and the support base 13 moves away from the end of the base frame 2.

Then, as shown in FIG. 11, the support arm 14 ′ and the swing arm 14 are tilted, and the disposable sheet 16 stretched above the fixed frame 3, the sheet drawer device 5, the sheet supply roll 4, and the bed mat 1 is lowered. To do.
When the fixed frame 3 is lowered to the lower limit position, the first motor 12 stops and the bed mat 1 protrudes upward from the center portion of the fixed frame 3. Further, the peripheral portion of the disposable sheet 16 covering the upper surface of the bed mat 1 is pressed by the fixed frame 3 and pulled downward, and is fixed in a tensioned and tensioned state.

When the 1st motor 12 stops, the 3rd motor 38 and the 4th motor 41 operate | move, and as shown in FIG. 12, the slide stand 39, the rotary blade 40 installed in this, and the 4th motor 41 are the width directions of a bed. While moving from one end toward the other end, the rotary blade 40 rotates.
When the rotary blade 40 moves while rotating, the rotary blade 40 moves in the width direction across the lowered disposable sheet 16, so that the disposable sheet 16 is cut between the bed mat 1 and the sheet supply roll 4.
When the slide base 39 reaches the other end of the bed, the fourth motor 41 stops, the third motor 38 starts reverse rotation, and the slide base 39 moves in the reverse direction. When the slide base 39 returns to one end in the width direction of the bed again, the third motor 38 stops.

In addition, since the used disposable sheet 16 is separated from the long disposable sheet 16 wound around the sheet supply roll 4, it can be easily removed when the fixed frame 3 is raised.
Further, the mechanism for moving the fixed frame 3 up and down, the mechanism for moving the gripping part 17 to open and close, and the mechanism for moving the rotary blade 40 are not limited to the above-described embodiments, and conventionally known alternative techniques can also be used.

The perspective view of the bed which shows the Example of this invention. The perspective view in the state where the cover of the bed which shows the example of the present invention was removed. The perspective view of the base frame and support stand moving mechanism which concern on the Example of this invention. The side view of the sheet drawer apparatus which concerns on the Example of this invention. The principal part front view of the sheet drawer apparatus which concerns on the Example of this invention. The front view of the cutting device which concerns on the Example of this invention. The principal part perspective view of the cutting device which concerns on the Example of this invention. The perspective view at the time of the fixed frame raising of the bed which shows the Example of this invention. The perspective view in the middle of the sheet | seat drawer of the bed which shows the Example of this invention. The perspective view at the time of the end of sheet drawing of the bed which shows the Example of this invention. The perspective view at the time of the fixed frame fall of the bed which shows the Example of this invention. The perspective view at the time of the bed cutting device action | operation which shows the Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bed mat 2 Base frame 3 Fixed frame 4 Sheet supply roll 5 Sheet drawer device 6 Cutting device 7 Cover 8 Storage groove 9 Ball screw 10 Drive ball screw 11 Gear box 12 1st motor 13 Support base 14 Swing arm 14 'Support arm 15 Bracket 16 Disposable Sheet 17 Gripping part 18 Upper piece 19 Lower piece 20 Upper roller 21 Lower roller 22 Upper guide groove 23 Lower guide groove 24 Pulley 25 Belt 26 Second motor 27, 28 Gear 29 Front concave part 30 Rear concave part 31 Horizontal piece 32 Front cover 33 Rear lid 34 Support frame 35 Drive pulley 36 Driven pulley 37 Belt 38 Third motor 39 Slide base 40 Rotating blade 41 Fourth motor 42 Transmission belt 43 Timing belt

Claims (5)

  A bed mat and a long disposable sheet were wound around, and a sheet supply roll installed adjacent to the bed mat and a tip of the disposable sheet wound around the sheet supply roll were detachably gripped and gripped. A sheet pulling device that pulls out the disposable sheet from the sheet supply roll and covers the upper surface of the bed mat; and a cutting device that cuts the disposable sheet drawn by the sheet pulling device between the sheet supply roll and the bed mat. With sheets changing bed.   The bed change bed according to claim 1, wherein a fixed frame is arranged around the bed mat so as to be movable up and down, and the fixed frame presses and fixes the peripheral portion of the disposable sheet covering the upper surface of the bed mat downward when lowered. .   When the sheet supply roll and the sheet pulling device are attached to the fixed frame and the fixed frame is raised, the disposable sheet pulled out from the sheet supply roll by the sheet pulling device is higher than the upper surface of the bed mat. The sheet exchange bed according to claim 2.   The sheet cutting bed according to claim 2 or 3, wherein the cutting device cuts the disposable sheet after the fixed frame descends and presses the disposable sheet. The said sheet | seat drawer | drawing-out apparatus has a pair of holding part which can be slid in the direction which cross | intersects the said sheet supply roll in the both sides of the said bed mat while holding the both ends of the disposable sheet. Sheet replacement bed according to one of the above.

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