JP2007064291A - Lifting device for platform member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lifting device for a platform member which allows a reduction of dead space and prevents the dead space from being increased even if the lifting range of the platform member is enlarged. <P>SOLUTION: The device is equipped with a rotor 7 and a long member 18 wound around the rotor 7 and pulled out of both sides of the rotor. While maintaining the relationship that both sides of the long member 18 are converged in the rotor with respect to the rotation in one direction by the rotor 7 and released from the rotor 7 with respect to the rotation in the other direction and the effective length of the long member 18 is extended with the rotation of the rotor 7, the device is provided with a drive mechanism for rotating the rotor 7. In accordance with the expansion on an effective side of the long member 18, a platform member such as a shelf P linked to the long member 18 is lifted up/down. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a lifting device that moves up and down a base member such as a shelf board.

For example, there is a mounting table described in Patent Document 1 as a mechanism that can easily adjust the position of a shelf or a table up and down.
This mounting table makes the legs provided at the four corners of the table freely extendable. Specifically, each leg is composed of a shaft member provided with a spiral groove and a cylindrical member provided with a spiral groove that is opposed to the shaft member and meshes with the spiral groove of the shaft member. The leg is expanded and contracted by rotating the kana.
In addition, sprockets are provided on the rotating members of each leg, the sprockets are connected by a belt, and the members are rotated simultaneously by moving a handle attached to the belt.
If such a mounting table is used as, for example, a shelf board, the position of the shelf board can be adjusted while an object is placed on the shelf. Therefore, the position of the shelf board can be easily adjusted according to the height of the placed object.
JP 2000-297898 A

In the mounting table as described above, it is necessary to provide legs provided with a vertical mechanism below the four corners of the base member. Therefore, a dead space is created under the base member by the amount of four legs. Moreover, in order to increase the range of movement in the vertical direction, it is necessary to increase the length of the shaft member, and there is a problem that the dead space under the base member also increases.
Moreover, since the said leg can be expanded-contracted with a shaft member and a cylinder member, the leg of the state expanded / contracted most becomes the length of a shaft member or a cylinder member. That is, there is a problem that the base member cannot be lowered below the length of the shaft member or the cylindrical member, and the movement range is limited.

  An object of the present invention is to provide a lifting device for a base member in which the dead space is reduced and the dead space is not increased even when the lifting range of the base member is increased.

1st invention is equipped with the rotary body and the elongate member wound around this rotary body and pulled out from the both sides of the rotary body, and both sides of a long member rotate the said rotary body in one direction While converging on the body and maintaining the relationship that both sides of the long member are released from the rotating body with respect to rotation in the other direction, the effective length of the long member is expanded and contracted as the rotating body rotates The present invention is characterized in that a drive mechanism for rotating the rotating body is provided, and a base member such as a shelf plate linked to the long member is moved up and down according to the expansion and contraction on the effective side of the long member. Have.
The effective length of the long member is a portion of the long member that is drawn from the rotating body except for a portion wound around the rotating body.

The second invention is based on the first invention, and a through hole is formed in the rotating body so as to penetrate in a direction intersecting with the rotation axis of the rotating body, and a long member is passed through the through hole. The long member is characterized in that it is pulled out from both sides of the rotating body.

3rd invention presupposes the said 1st or 2nd invention, the base member which enabled vertical movement, the rotary body provided above this base member, and the elongate pulled out from the both sides of the rotary body A pair of guide rollers for guiding the member to the base member, and characterized in that both end portions of the long member are directly or indirectly connected to the base member.

  4th invention presupposes the said 1st or 2nd invention, provided the base member made to be able to move up and down, the rotary body attached rotatably to this base member, and the base member above, and A pair of fixing portions for fixing both ends of the long member pulled out from both sides of the rotating body and the base member, and the long member is guided between the rotating body and the fixing portion. It is characterized in that it has a pair of guide rollers.

  5th invention presupposes the said 3rd or 4th invention, and has the characteristics in the point which used either guide roller as said rotary body among said pair of guide rollers.

  6th invention presupposes the said 1st-5th invention, and the rotation mechanism of the said rotating body is allowed to rotate in the direction in which a long member converges, The direction which releases a long member The one-way clutch for restricting the rotation of the rotating body and the restriction releasing means for releasing the rotation restriction of the one-way clutch are provided.

  The seventh invention is based on the first to sixth inventions, and the base member is configured to drop by its own weight when the restriction release means releases the rotation restriction of the one-way clutch. It is characterized in that a damper is provided that regulates the rotational speed of the rotating body when falling.

  8th invention presupposes the said 6th or 7th invention, The said regulation cancellation means consists of a meshing clutch provided between the one-way clutch and the rotary body, and meshes it with this meshing clutch. A spring member that applies a spring force in the direction is provided, and the rotating body is configured to freely rotate when the meshing clutch is disengaged against the spring force of the spring member.

According to the first invention, since the base member is suspended by the long member, members such as legs that expand and contract become unnecessary, and the dead space can be reduced. In particular, since there is almost no dead space below the base member, the base member can be lowered to a low position. In addition, the dead space is not increased by increasing the elevation range of the base member.
In addition, with the configuration in which the long members are pulled out from both sides with respect to one rotating body, the long members on both sides can be simultaneously expanded and contracted by the rotation of one rotating body. Since two rotating bodies and drive mechanisms are not required to extend and contract the long members on both sides, further space saving can be achieved.
Furthermore, when the rotating body is rotated, the length of the long member drawn out in both directions of the rotating body changes by the same length, so that the base member does not tilt when it is rolled up or released. Thus, there is no need to adjust the balance of the long member in both directions.

According to the second invention, the left and right lengths of the long member can be easily adjusted even if the installation position of the rotating body is changed.
In the third invention, the base member is suspended at the tip portion of the long member, and the rotating body and the driving mechanism of the rotating body are provided at a different location from the base member. Only the weight works. Therefore, the strength of the long member can be reduced as compared with the case where the rotating member is provided on the base member.
In the fourth invention, since the rotating body is provided on the base member, when the handle is attached to the rotating body, the handle is located at the same position as the base member. Therefore, even when the raised position of the base member is high, the handle position is lowered and the handle operation is easy as compared with an apparatus in which a rotating body is provided above the base member.
According to the fifth aspect, the number of parts can be reduced.

In the sixth aspect of the invention, the one-way clutch can rotate the rotating body in the direction in which the base member is raised. However, since the rotation in the downward direction is restricted, the base member does not fall without permission. . Therefore, the base member can be stopped at an arbitrary position without performing a special operation in the process of raising the base member.
On the other hand, if the restriction of the one-way clutch is released, the base member can be dropped by its own weight. Therefore, it is not necessary to rotate the rotating body in order to lower the base member.

  According to the seventh aspect, when the rotation restriction of the one-way clutch is released and the base member is lowered by its own weight, the lowering speed can be made moderate. Therefore, it is possible to reduce the impact applied to the base member when descending. Therefore, there is no fear of dropping the placed object even if the table member is moved up and down while the object is placed on the table member.

  In the eighth invention, when the rotation restriction of the one-way clutch is released, the meshing clutch is pulled apart against the spring force of the spring member. If the force against the spring force is released, the rotation force is restored by the spring force. That is, even if no special operation is performed, the rotation restricted state can be surely achieved by the spring force. Therefore, the base member does not fall down without permission.

1 to 7 show a first embodiment of the present invention.
FIG. 1 is a front view of an elevating device that raises and lowers a shelf plate P as a base member, and FIG. 2 is a plan view.
As shown in FIGS. 1 and 2, the lifting device includes a lower frame 1 provided on a plane, an upper frame 3 provided above the lower frame 1, and guide posts 2 a provided between the upper and lower frames. , 2b, 2c, 2d.
The lower frame 1 is constituted by parallel frame members 1a and 1b provided on the front and rear on a plane, and a pair of frame members 1c and 1d which are orthogonal to and parallel to the frame members 1a and 1b. In FIG. 1, the upper side of the drawing is the front of the apparatus, and in FIG. 2, the lower side in the figure is the front of the apparatus.

Two guide columns 2a, 2b and 2c, 2d are erected on the frame members 1c, 1d, respectively, and frame members 4a, 4b parallel to the frame members 1c, 1d are attached to the upper ends thereof. Further, the upper frame 3 is mounted on the frame members 4a and 4b.
The upper frame 3 includes parallel frame members 3a and 3b provided at the front and rear and a pair of left and right frame members 3c and 3d provided between the frame members 3a and 3b. The frame members 3a and 3b are passed to the pair of frame members 4a and 4b and are parallel to the frame members 1a and 1b of the lower frame 1.
The pair of frame members 3c and 3d are provided on the center side of the frame members 4a and 4b.

Each of the frame member and the guide strut has a groove that is continuous in the axial direction on four surfaces in the longitudinal direction. In FIGS. 1 and 2, these end surfaces are indicated by broken-line squares. .
As shown in FIG. 2, a clutch box 5 is attached to the center of the front upper frame member 3a, and a damper 6 is attached to the center of the rear frame member 3b. A single rotating shaft 7 is linked to the clutch box 5 and the damper 6.
Further, a shaft 9 is projected from the clutch box 5 on the opposite side to the rotary shaft 7, and a handle 10 is attached to the shaft 9.
In FIG. 2, reference numeral 8 is a coupling member for connecting the rotating shaft 7 and the damper 6, and reference numeral 11 is an attachment member for attaching the damper 6 to the frame member 3b.

As shown in FIG. 3, the clutch box 5 includes a box main body 5a and a cover 5b. The box main body 5a includes a bearing 12 that supports the rotating shaft 7, and the cover 5b includes a shaft 9a. A bush 13 for supporting the
A first gear 14a is attached to the end of the rotating shaft 7 in the box body 5a. A second gear 14b meshing with the first gear 14a is opposed to the first gear 14a, and the end of the shaft 9 is attached to the second gear 14b.
The first gear 14a and the second gear 14b constitute the meshing clutch 14 of the present invention.

Further, a cylindrical stopper collar 15 is attached to the outer periphery of the shaft 9, and a coil spring 16 which is a spring member of the present invention is provided between the inner bottom surface of the stopper collar 15 and the second gear 14b. The coil spring 16 applies a spring force in the direction toward the first gear 14a to the second gear 14b. Therefore, in the normal state shown in FIG. 3, the second gear 14 b is pressed against the first gear 14 a by the spring force, and the two mesh with each other.
Therefore, if the handle 10 is pulled forward from the front of the apparatus against the spring force of the coil spring 16, the engagement clutch 14 can be disconnected, but if the handle 10 is released, the spring force of the coil spring 16 is released. Thus, the second gear 14b can return to the position of FIG. 3 to connect the meshing clutch 14.

  The outer bottom surface of the stopper collar 15 is in contact with a step portion 5c formed by the box body 5a and the cover 5b so that it does not move further to the cover 5b side. Therefore, when the handle 10 is pulled to disconnect the meshing gear, the moved second gear 14b collides with the opening end 15a of the stopper collar 15 and stops. The reason why the movement amount of the second gear 14b is regulated by the stopper collar 15 is to prevent the user from pulling the handle 10 more than necessary when the meshing clutch 14 is disconnected.

If there is no stopper collar 15 as described above and the handle 10 is pulled more than necessary, the amount of deflection of the coil spring 16 becomes very large. If the coil spring 16 is bent too much, the durability of the coil spring 16 may be deteriorated. However, if the stopper collar 15 is provided, there is no such concern.
Further, in order to disengage the meshing gear 14, if the handle 10 has to be pulled until the second gear 14b collides with the stopper collar 15, the user needs to pull the handle 10 when the handle 10 is pulled. There is also an advantage that it is easy to operate by knowing the amount.

Further, a one-way clutch 17 is provided in the cover 5b. There is a one-way clutch as described in Japanese Patent Application Laid-Open No. 2002-349608. The one-way clutch 17 allows only one direction of the relative rotation between the shaft 9 and the cover 5b, and the opposite direction. Is to regulate the rotation of the.
Specifically, an outer ring 17b is fixed to the cover 5b, and a needle 17c interposed between the outer ring 17b and the shaft 9 is provided. At the time of rotation in the one direction, the needle 17c rotates freely between the shaft 9 and the outer ring 17b, and allows relative rotation between the shaft 9 and the outer ring 17b. However, at the time of reverse rotation, the needle 17c bites into the gap formed by the shaft 9 and the outer ring 17b like a wedge to restrict the relative rotation of both.

As described above, in a state where the relative rotation between the shaft 9 and the outer ring 17b is restricted, the shaft 9 and the outer ring 17b are integrated with each other, so that the shaft 9 cannot be rotated with respect to the case 5b. In this embodiment, only the rotation of the shaft 9 rotating in the direction indicated by the arrow A is allowed. That is, the shaft 9 can be rotated in the arrow A direction by the handle 10, but cannot be rotated in the arrow B direction.
The damper 6 is a mechanism for imparting resistance when the rotating shaft 7 connected to the damper 6 rotates, and any principle may be used. In short, when the rotating shaft 7 rotates, a resistance force is exerted to slow down the rotation speed. However, the damper 6 used here is preferably a damper that exhibits a damper function only when the rotation direction of the rotary shaft 7 is in the direction of the arrow B and does not exhibit a damper function when rotated in the direction of the arrow A. .

Further, as shown in FIGS. 2 and 3, the rotary shaft 7 is formed with a pair of through holes 7a and 7a intersecting with the shaft, and the wire 18 which is a long member of the present invention is formed in the through hole 7a. It penetrates. As shown in FIG. 2, the through holes 7 a are formed at two positions on the front and rear sides of the rotary shaft 7, and the wires 18 are passed through the respective holes. However, since both the front and rear are the same configuration, only the front through hole 7a and the portion related thereto will be described here, and for the rear portion, the same reference numerals are given to the components corresponding to the front portion. Description is omitted.
The through holes 7a and 7b are not limited to two places. One place or three places or more may be used. However, it is desirable to provide the base member at a position where the base member can be supported in a balanced manner.

The wire 18 penetrating the through hole 7a is pulled out from the through hole 7a to the left and right sides, and the left side portion of the through hole 7a is hung on the guide roller 19a mounted on the left frame member 3c and guided downward. The right side portion of the wire 18 is hung on a guide roller 19b mounted on the right frame member 3d and guided downward.
Guide blocks 20 and 20 are respectively attached to the left and right ends of the wire 18 guided downward.

FIG. 4 is a view showing the right wire 18 and the guide block 20 fixed to the tip thereof. As shown in FIG. 4, the guide block 20 is formed with a through hole 21 penetrating in the vertical direction, and a rod-shaped member 22 connected to the wire 18 is passed through the through-hole 21, and a nut 22 a is connected to the lower end of the rod-shaped member 22. By fixing the guide block 20, the guide block 20 is fixed to the wire 18.
The guide block 20 is also fixed to the left end portion of the wire 18 in the same manner as in FIG.
In addition, the guide blocks 20 and 20 are attached to both ends of the wire 18 penetrated through the rear through hole formed in the rotating shaft 7 in the same manner as described above.

Further, as shown in FIGS. 4 and 1, each guide block 20 is formed with a U-shaped recess 20 a, and the shelf plate P is inserted into the recess 20 a of the four guide blocks 20. The shelf block is held by the guide block 20. The shelf plate P inserted into the recess 20a may be fixed to the guide block 20. However, if the shelf plate P is simply inserted into the recess 20a, the shelf plate P can be made detachable.
Further, as shown in FIG. 5, the guide block 20 is provided with a U-shaped concave portion 20b extending in the vertical direction on the opposite side to the concave portion 20a with the wire 18 as a boundary. 2c. Then, a screw member 23 is projected from the outer surface of the guide block 20 into the recess 20b, a guide member is provided at the tip of the screw member 23, and this is inserted into a recess extending in the axial direction of the guide column 2c.

4 and 5 show the right front guide column 2c and the members attached thereto, the guide blocks 20 are similarly attached to the other guide members 2a, 2b, and 2d, and these guides are also shown. The shelf board P is held by the block 20.
That is, the shelf plate P is suspended from both ends of the wire 18 that passes through the through hole 7 a of the rotating shaft 7 provided in the upper frame 1.

The procedure for moving the shelf board P up and down by the lifting device as described above will be described below.
In this lifting device, since the shelf board P is suspended by the wire 18, the shelf board P can be moved up and down by changing the length of the wire 18.
When the shelf P is raised by this device, the user rotates the handle 10 in the direction of arrow A. The rotation in the direction of arrow A is the rotation direction allowed by the one-way clutch 17. Further, as described above, the mesh clutch 14 is normally engaged by the spring force of the coil spring 16. Therefore, the rotation of the handle 10 is transmitted from the shaft 9 to the rotating shaft 7 via the meshing clutch 14, and the rotating shaft 7 rotates in the arrow A direction (FIG. 3).

When the rotary shaft 7 rotates in the direction of arrow A, as shown in FIGS. 6A, 6B and 6C, the rotary shaft 7 rotates from the state where the wire 18 in FIG. 6A is not wound. As shown in FIG. 6C, the wire 18 is wound around the rotating shaft 7 through the initial state shown in FIG.
Thus, when the wire 18 is wound around the rotating shaft 7, as shown in FIG. 7, the wires drawn out on both sides of the rotating shaft 7 converge toward the rotating shaft 7, and the effective length of the wire 18 is short. Become. If the wire 18 becomes short, the shelf board P will rise accordingly.

That is, in the wire 18, the distance from the portion drawn from the rotating shaft 7 to the shelf board P or the guide block 20 corresponds to the effective length of the long member of the present invention. And the said effective length is changed by winding the wire 18 around the rotating shaft 7, and making it converge, or releasing.
And the wire 18 wound by rotation of the rotating shaft 7 becomes the same quantity in the both-sides part of the rotating shaft 7. FIG. In other words, the effective length of the wire on both sides of the rotating shaft can be changed by the same amount without special adjustment.
When the rotation direction of the rotary shaft 7 is in the direction of arrow A, the damper 6 does not exhibit a damper function, so that the handle 10 can be easily rotated when the shelf board P is raised.

If the handle 10 is released while the handle P is raised to an arbitrary height by operating the handle 10 as described above, the weight of the shelf board P, the guide block 20, etc. acts on the wire 18 as it is. . Therefore, a force in the direction of unwinding the wound wire 18, that is, a force for rotating the rotation shaft 7 in the direction of arrow B (see FIGS. 6 and 7) acts on the rotation shaft 7.
However, the rotation in the B direction is a rotation direction regulated by the one-way clutch 17.
Therefore, the rotary shaft 7 is fixed by the one-way clutch 17 and the position of the shelf board P is fixed.

  On the other hand, when the shelf P is lowered, the handle 10 is pulled forward against the spring force of the coil spring 16 in the clutch box 5. When the handle 10 is pulled to disengage the second gear 14b from the first gear 14a, the linkage between the rotary shaft 7 and the one-way clutch 17 is disconnected (see FIG. 3). That is, the meshing clutch 14 composed of the first gear 14a and the second gear 14b is a restriction releasing means for releasing the rotation restriction of the present invention.

Thus, if the rotating shaft 7 is disconnected from the one-way clutch 17, the rotating shaft 7 rotates in the arrow B direction by its own weight such as the shelf board P. When the rotating shaft 7 rotates in the direction of arrow B, the wire 18 wound around the rotating shaft 7 is drawn out, and its effective length becomes longer. Therefore, the shelf board P descends by the amount of the wire 18 extending. When the handle 10 is returned to the original position and the second gear 14b and the first gear 14a are engaged with each other, the rotation of the rotary shaft 7 is stopped by the one-way clutch 17 and the position of the shelf board P can be fixed. Out.
In addition, during the rotation in the direction of arrow B, which is the direction in which the shelf P descends, the damper 6 exhibits a damper function, so that the rotation shaft 7 is slowly rotated and the shelf P does not fall abruptly. .

  Thus, the user can easily move the shelf board P up and down by operating the handle 10. In addition, when the shelf P is raised and lowered, the guide blocks 20 move up and down along the guide columns 2a, 2b, 2c, and 2d, so that the shelf P does not shake. Moreover, since the amount of expansion and contraction on both sides of the wire 18 can be made uniform, the shelf board P will not be inclined during elevation. Therefore, it is also possible to raise and lower the shelf board P with an object placed thereon.

In this lifting device, since the shelf board P is supported by the wire 18, it is not necessary to provide a leg at the lower part of the shelf board P as in the prior art. Therefore, the dead space below the shelf board P can be eliminated.
In the past, the shelf board could not be lowered below the length of the most contracted leg, but this is not the case with the lifting device of the present invention. Depending on the length of the wire, which is a long member, the lifting range can be increased, and there is no fear of increasing the dead space by increasing the lifting range.

The second embodiment shown in FIGS. 8 and 9 is different from the first embodiment in the mounting positions of the components shown in FIG. 3 such as the rotating shaft 7 and the clutch box 5, the handle 10, and the damper 6 connected thereto. FIG. 8 is a front view of the apparatus, and FIG. 9 is a plan view. In the first embodiment, the guide roller 19a provided on the frame member 3c is not used in the second embodiment, but other configurations are the same as those in the first embodiment.
In the description of the second embodiment, the same reference numerals are used for the same components as those in the first embodiment, but descriptions of the same components as those in the first embodiment are omitted.

In the second embodiment, by providing the rotating shaft 7 above the left frame member 3c, the function of the guide roller for guiding the wire 18 to the lower shelf plate P along the left guide columns 2a and 2b is as follows. The rotating shaft 7 is assumed to bear.
Thereby, in this 2nd Embodiment, it is not necessary to make the guide roller 19a and the rotating shaft 7 of 1st Embodiment into another component, and can reduce a number of parts compared with the case where these are used as another component. . Even if the rotation shaft 7 is provided at the right end, the same effect as in this embodiment can be obtained.

And the effect of the raising / lowering mechanism of the shelf board P by the apparatus of this 2nd Embodiment is completely the same as 1st Embodiment.
Further, the mounting position of the rotating shaft 7 on the upper frame 3 is not limited to the position of the first and second embodiments. If the rotating shaft 7 which is a rotating body is provided in the vicinity of the guide column as in the second embodiment, the rotating body and the guide roller can be used together, but if the wire can be guided to the shelf plate, the rotating body Can be installed anywhere.

In the devices of the first and second embodiments, the shelf board P is attached to the wire 18 via the guide block 20, but a guide hole is formed in the shelf board P and the guide column is inserted there. You may do it. In that case, although it is necessary to fix the edge part of the wire 18 to the shelf board P, the said guide block 20 can be abbreviate | omitted. However, if the shelf board P is inserted into the recess 20a of the guide block 20 as in the above embodiment, only the shelf board P can be removed from the lifting device. For example, when the height of the placement object is very high, not only the shelf board P is moved up and down, but also by removing the shelf board P, it is possible to reduce the number of steps of the shelf and place a taller object.
However, even in the case where the shelf plate P cannot be removed, if the shelf plate P is lowered to the floor surface, it can be the same as when the shelf is reduced by one step.

The third embodiment shown in FIGS. 10 and 11 is an apparatus in which the parts shown in FIG. is there. FIG. 10 is a front view of the apparatus, and FIG. 11 is a bottom view. In these drawings, the same reference numerals are used for the same components as those in the first and second embodiments.
As shown in FIGS. 10 and 11, the apparatus according to the third embodiment includes four guide columns 2a, 2b, 2c, and 2d that stand on a plane. These guide columns are provided on the lower frame 1 similar to the first embodiment shown in FIG. 1 although not shown here.
Further, the shelf board P in the third embodiment is made of sheet metal, and includes a side wall part 24 a that is folded around the flat part 24. The clutch box 5 is attached to the front side wall 24a, and the damper 6 is attached to the rear side wall 24a.

As in the other embodiments, a pair of through holes 7a and 7a are formed in the rotating shaft 7 connected between the clutch box 5 and the damper 6, and a wire 18 is passed through each of them.
Furthermore, four through holes 25 are formed in the plane portion 24 in order to pull out the end portions of the wires 18 to the upper side of the shelf plate P, and the wires 18 are connected to the through holes 25 in the vicinity of these through holes 25. Left and right guide rollers 26a and 26b are provided. The guide rollers 26a and 26b are screwed to an attachment portion 27 provided on the back surface of the flat surface portion 24, but the guide rollers 26a and 26b may be attached by any method.

Further, on the outer side of the guide roller 25 in the flat portion 24, a folded piece 24b is formed by cutting. The folded piece 24 b is folded back to the back side of the flat portion 24 to form a guide hole 28. Guide struts 2a, 2b, 2c, and 2d are inserted into the guide holes 28, respectively.
The guide struts 2a, 2b, 2c, and 2d inserted into the guide hole 28 are sandwiched between the pair of folded pieces 24b and 24b that are folded back to the back side when the guide hole 28 is formed. Thereby, the shelf board P comes to move up and down along the four guide columns 2a, 2b, 2c, and 2d.

On the other hand, a fixing member 29 is provided in the vicinity of the upper end of each guide column 2a, 2b, 2c, 2d, and both end portions of the wire 18 are connected to the fixing member 29 via connecting members 30a, 30b. ing. The fixing member 29 is a fixing portion of the present invention.
In FIG. 10, the connecting member 30 a of the left guide column 2 a and the connecting member 30 b of the right guide column 2 c are different in shape, but the difference in shape is that the connecting member 30 a is the length of the wire 18. This is because the connecting member 30b is not provided with an adjusting mechanism. However, the left and right connecting members may or may not have a length adjusting mechanism.

Such a lifting device of the third embodiment is also configured to suspend the shelf board P by the wire 18. And the procedure which raises / lowers the shelf board P using this raising / lowering apparatus is the same as above-mentioned other embodiment.
That is, if the handle 10 is rotated in the direction of arrow A, the rotating shaft 7 rotates, the wires 18 on both sides thereof are wound and converged, the wire length from the left connecting member 30a to the rotating shaft 7, The wire length from the right connecting member 30b to the rotating shaft 7 is reduced by the same amount. Thus, the shelf board P raises by the part for which the wire length became short.
When the handle 10 is released, the rotation of the rotary shaft 7 is stopped by the one-way clutch 17 (see FIG. 3) in the gear box 5, so that the shelf board P can be kept at a predetermined position.

On the other hand, if the handle 10 is pulled forward and the meshing clutch 14 shown in FIG. 3 is disconnected, the rotating shaft 7 rotates in the direction of arrow B due to its own weight such as the shelf plate P, and the wire 18 wound around the rotating shaft 7 is pulled. It releases, and the shelf length P descends as the effective length of the wire increases.
Further, when the shelf board P is lowered, the damper 6 functions to slow the descending speed of the shelf board P.
As described above, the lifting device for the base member of the third embodiment also functions in the same manner as in the first and second embodiments. And even if a dead space is small and the raising / lowering range of the shelf board P is enlarged, there exists a merit that a dead space does not become large.

  In the third embodiment, the guide holes 28 are directly formed on both sides of the shelf board P. However, using a separate guide member such as the guide block 20 of the first embodiment, It may be attached to the shelf board P. However, in this embodiment, since the rotating shaft 7 as a rotating body is fixed to the shelf plate P, the shelf plate P cannot be removed from the guide member in a state where the wire 18 is fixed to the fixed member 29.

The fourth embodiment shown in FIGS. 12 and 13 is an apparatus in which the parts shown in FIG. 3 such as the rotating shaft 7 and the clutch box 5, handle 10 and damper 6 connected thereto are provided at the left end of the shelf board P. 12 is a front view, and FIG. 13 is a bottom view.
And in this 4th Embodiment, instead of the left guide roller 26a toward 3rd Embodiment shown in FIG. 10, the wire 18 is guide | induced to the upper direction of the shelf board P with the rotating shaft 7. FIG. Although this point is different from the third embodiment, other configurations and operations are the same as those of the third embodiment.
Therefore, the lifting device of the fourth embodiment also has a small dead space, and even if the lifting range of the shelf board P is increased, the dead space does not increase.
Moreover, in the apparatus of 4th Embodiment, since the rotating shaft 7 bears the function of the left guide roller 26a, it is not necessary to make a guide roller and a rotating shaft into separate components, and these are made into separate components. Compared to the case, the number of parts can be reduced. Even if the rotation shaft is provided at the right end, the same effect as this embodiment can be obtained.

In the case where the rotating body is provided on the base member as in the third and fourth embodiments, the rotating body moves up and down as the base member is raised and lowered. Compared with the first and second embodiments provided, the handle can be operated at a lower position.
However, since the weight of the rotating body and the driving mechanism of the rotating body is added to the base member that moves up and down, the tension acting on the long member such as a wire is increased. Therefore, compared with the apparatus of the said 1st, 2nd embodiment, intensity | strength may be requested | required of an elongate member.

  In the first to fourth embodiments, the wire as the long member is passed through the through hole 7a formed in the rotating shaft 7 and pulled out to both sides, but the wire is rotated without forming the through hole 7a. On the shaft 7, two wires drawn out to both sides may be fixed separately. However, when using one end of a wire fixed to a rotary body, it is necessary to adjust the length of both wires so that a base member may keep horizontal. When using one wire 18 penetrating through one through-hole 7a as in the above embodiment, if the inclination is corrected with the shelf P suspended, the wire 18 passes through the through-hole 7a. The balance of the left and right of the wire 18 can be automatically adjusted by moving.

Moreover, in the said embodiment, although the rotating shaft 7 comprises the rotating body of this invention, as a rotating body, a roller different from the rotating shaft 7 etc. may be sufficient. The rotating body such as the roller may be provided around the rotating shaft directly connected to the driving mechanism, or may be provided at a location away from the rotating shaft so that the driving force is transmitted to the rotating body by a belt or the like. Good.
Further, the long member of the present invention is not limited to the wire as described above, and may be a belt or a chain.

In the first to fourth embodiments, the handle 10, the shaft 9, the meshing clutch 14, and the rotary shaft 7 constitute the drive mechanism of the present invention. As the drive mechanism, the rotary shaft 7 is rotated. If possible, the configuration is not limited to the above. For example, an electric motor may be used instead of the manual handle 10.
Moreover, in the said embodiment, although the four guide support | pillars 2a, 2b, 2c, 2d are provided so that the shelf board P may not shake at the time of raising / lowering of the shelf board P, a guide means is not restricted to a support | pillar. For example, when this device is applied to various structures and raising / lowering shelf boards in a storage case, the inner wall and the shelf board member side mesh with each other and form unevenness that continues in the height direction. However, the movement of the shelf board P may be guided using these irregularities. That is, the function of the guide column may be provided on an inner wall of a storage case or the like, or the structure column and the guide column may be used together.
Furthermore, the structure for supporting the rotating body is not limited to the above embodiment. For example, a ceiling board can be used in place of the upper frame 1.
On the other hand, the lifting device of the present invention having the upper and lower frame portions and the guide columns can be used as a shelf that can be lifted and lowered simply by unitizing them and storing them in a storage case.

In the above embodiment, the one-way clutch is used to stop the shelf board P at a predetermined position, but the stopper mechanism for preventing the shelf board P from falling is not limited to the one-way clutch. For example, when a mechanism for preventing the release of the wire 18 is provided by sandwiching the rotating shaft 7 together with the wound wire 18, or when the position of the shelf board P is determined, a fixing pin is inserted into the guide post and the shelf board P May be fixed directly.
Thus, if the rotation of the rotating body is stopped by a method other than the one-way clutch, a meshing clutch for attaching / detaching the connection between the one-way clutch and the rotating body becomes unnecessary.

In addition, when the base member such as the shelf board P is dropped by its own weight, the damper 6 may not be used if it is not necessary to slow down the dropping speed.
Even if the one-way clutch 17, the meshing clutch 14, and the damper 6 are not used, the object of the present invention of reducing the dead space can be achieved by suspending the base member with the long member.
And the raising / lowering apparatus of the base member of this invention can be utilized for various base members, such as the above shelf boards.

It is a front view of a 1st embodiment. It is a top view of a 1st embodiment. It is a fragmentary sectional view of the rotating body of 1st Embodiment, and a drive mechanism part. It is a front view for demonstrating attachment of the guide block of 1st Embodiment. It is the VV sectional view taken on the line of FIG. It is a schematic diagram for demonstrating the winding state of the wire around the rotating shaft of 1st Embodiment, and represents the state where the wire is not wound. It is a schematic diagram for demonstrating the winding state of the wire around the rotating shaft of 1st Embodiment, and represents the state which the rotating shaft started to rotate. It is a schematic diagram for demonstrating the winding state of the wire around the rotating shaft of 1st Embodiment, and represents the state in which the wire is wound. It is a top view for demonstrating winding of the wire of a 1st embodiment. It is a front view of 2nd Embodiment. It is a top view of a 2nd embodiment. It is a front view of 3rd Embodiment. It is a bottom view of a 3rd embodiment. It is a front view of 4th Embodiment. It is a bottom view of a 4th embodiment.

Explanation of symbols

P Shelf 6 Damper 7 Rotating shaft 7a Through hole 9 Shaft 10 Handle 14 Engagement clutch 16 Coil spring 17 One-way clutch 18 Wires 19a, 19b Guide rollers 26a, 26b Guide rollers 29 Fixing member

Claims (8)

  A rotating body, and a long member wound around the rotating body and pulled out from both sides of the rotating body, and both sides of the long member converge on the rotating body with respect to rotation in one direction of the rotating body, and the like. While maintaining the relationship that both sides of the long member are released from the rotating body with respect to rotation in the direction, the effective length of the long member is expanded and contracted as the rotating body rotates, while the rotating body is rotated. A lifting / lowering device for a base member, which is provided with a drive mechanism for moving the base member such as a shelf plate linked to the long member in accordance with expansion / contraction of the effective length of the long member.   The through-hole which penetrates in the direction which cross | intersects the rotating shaft of a rotary body is formed in the said rotary body, A long member is penetrated to this through-hole, The long member was pulled out from the both sides of the rotary body. The raising / lowering apparatus of the base member of description.   A base member that is movable up and down, a rotating body provided above the base member, and a pair of guide rollers that guide the long member drawn from both sides of the rotating body to the base member, the long member The lifting device for a base member according to claim 1 or 2, wherein both of the tip portions thereof are directly or indirectly connected to the base member.   A base member that can be moved up and down, a rotating body that is rotatably attached to the base member, and a tip member that is provided above the base member and that is extended from both sides of the rotating body, respectively. The stand according to claim 1, further comprising: a pair of fixing portions to be fixed; and a pair of guide rollers that are provided on the base member and are between the rotating body and the fixing portion and guide the long member. Member lifting device.   The raising / lowering device of the base member of Claim 3 or 4 which made any one guide roller among the said pair of guide rollers the said rotary body.   The driving mechanism of the rotating body allows the rotation of the rotating body in the direction in which the long member converges and restricts the rotation of the rotating body in the direction of releasing the long member, and the rotation of the one-way clutch. The raising / lowering apparatus of the base member of any one of Claims 1-5 provided with the regulation cancellation | release means which cancels | releases regulation.   The damper is provided with a damper for restricting the rotational speed of the rotating body when the base member is dropped while the base member is dropped by its own weight when the restriction restriction means releases the rotation restriction of the one-way clutch. The raising / lowering apparatus of the base member of any one of 1-6.   The deregulation means comprises a meshing clutch provided between the one-way clutch and the rotating body, and a spring member for applying a spring force in the direction of meshing the meshing clutch is provided. The spring force of the spring member The raising / lowering apparatus of the base member of Claim 6 or 7 made it the structure which the said rotary body rotates freely when the meshing clutch was disengaged against this.

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