JP2008018123A - Driving device for manual type movable shelf - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a driving device for manually movable shelves which periodically changes the reduction rate according to the rotational angle of an operation handle, reduces a load when a heavy movable shelf is moved, and can lightly be operated by a user in the rotational force transmitting mechanism which transmits the rotational force of the operation handle to a driving wheel. <P>SOLUTION: This driving device includes the rotational force transmitting mechanism 7. In the rotational force transmitting mechanism 7, a driving wheel and a single or a plurality of driven wheels are provided at positions corresponding to rails 2 at the lower end of the movable shelf 1, and the rotational force of an operating handle 6 which is provided at a central stage on the front surface of the movable shelf is transmitted to the driving wheel by the rotational force transmitting mechanism 7. The rotational force transmitting mechanism comprises a pair of rotary bodies 8 and 9 consisting of larger/small sprockets or a toothed pulley, and an endless cable body 10 consisting of a chain or a timing belt which is wound around both rotary bodies. The rotator 8 having a smaller diameter which is rotationally driven by the operating handle is formed into a non-circular shape, and at the same time, a slack preventing means 11 for preventing the slack of the endless cable body is provided. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a manual moving shelf drive device, and more specifically, driving a manually operated moving shelf in which a passage is formed between a moving shelf moved in a lateral direction by rotating an operation handle and an adjacent moving shelf. It relates to the device.

  Conventionally, a plurality of movable shelves having wheels that are driven to rotate manually are arranged so as to be movable along rails laid in a direction perpendicular to the entrance / exit surfaces, and the movement of the movable shelves There are various types of manual moving shelf devices in which a passage having a predetermined width is formed. Then, a user operates an operation handle provided on the front surface of each movable shelf, and a fixed force is arranged between predetermined movable shelves or at a side end portion by rotating a wheel through a drive transmission system with a rotational force of the operation handle. A passage is formed between the shelf and the movable shelf, and a user enters the passage, and articles such as books and files are taken in and out from the entrance / exit face facing the passage.

  In Patent Document 1, in a cart of a moving shelf, a rotating shaft of a wheel and a power shaft that is manually rotated are linked by a reduction mechanism, and a large-diameter sprocket is fixed to a front end portion of the power shaft. A small-diameter sprocket is linked to the drive shaft of the operation handle provided in the middle stage of the front panel of the moving shelf, a chain is wound around both sprockets, and the wheel is rotated in the same direction as the rotation by rotating the operation handle. It is structured to be moved. As described above, when transmitting the rotational force from the operation handle to the wheel, the operation handle can be lightly rotated by a several-stage reduction mechanism, but heavy objects such as books and parts are placed on the moving shelf. When stored, the operation handle becomes heavy. In particular, the movement of the moving shelf initially requires a relatively large force. The conventional torque transmission mechanism consisting of a sprocket and a chain always applies a constant load to the operation handle, but when the user rotates the operation handle, it is easy to apply force according to the rotation angle. In such a case, it may be difficult to enter periodically.

Here, when a small-diameter sprocket is fixed to the drive shaft of the operation handle, the rotational force of the wheels is directly transmitted to the operation handle. Therefore, when the moving shelf moves during inertia movement or due to an earthquake or the like, the operation handle Rotating, the reaction is transmitted to the user's hand, and unexpectedly collides with the body. Therefore, conventionally, as disclosed in Patent Document 2, the operation handle and the sprocket are linked by a clutch mechanism so that the rotational force starting from the wheel is not transmitted to the operation handle. Specifically, the clutch mechanism has a cam wheel fixed with a sprocket and a claw mounting disk fixed with an operation handle mounted coaxially so as to be independently rotatable, and 90 ° on the inner peripheral surface of the cylindrical portion of the cam wheel. In a state in which engaging portions are projected at intervals and the operation handle is suspended by its own weight, both the upper and lower sides of the claw mounting disk are symmetrical to each other so that one end of each claw is pivotally attached, and both claws are attached to the cam. It is the structure located in the cylindrical part of the car. Then, by rotating the operation handle, one of the suspended claws engages with the engaging portion closest to the rotation direction to rotate the cam wheel, that is, to rotate the sprocket. Then, while the rotational force is applied to the operation handle, the engagement between the claw and the engaging portion is maintained and the rotational force is transmitted to the sprocket. Further, when the hand is released from the operation handle at an arbitrary rotational position, the engagement between the claw and the engaging portion is released, and the operation handle is returned to the initial state where it is suspended by its own weight.
JP 2002-101973 A Japanese Utility Model Publication No. 56-150444

  When manually moving a heavy moving shelf by rotating the operation handle, ideally, in the rotational force transmission mechanism, when the load at the beginning of movement of the moving shelf is maximum, the reduction ratio is set so as to reduce the load. Maximize the speed reduction ratio even at a rotation angle where it is difficult to apply the force of the operating handle, and increase the speed reduction ratio when the rotation angle is easy to apply force or when the moving shelf is moving with inertial force. It is preferable that it can be adjusted to be small. However, with a mechanical torque transmission mechanism, it is impossible to set an ideal reduction ratio in all cases. Further, even if the user's physique is different, the rotation angle at which the force is easily applied to the operation handle and the force is difficult to be applied is different.

  Therefore, in view of the above-mentioned situation, the present invention intends to solve the problem that the rotational force transmission mechanism that transmits the rotational force of the operation handle to the drive wheels periodically changes the reduction ratio according to the rotation angle of the operation handle. It is possible to reduce the load when moving a heavy moving shelf, and to provide a manual moving shelf driving device that can be operated lightly by the user.

  In the present invention, in order to solve the above-described problem, a plurality of movable shelves are movably arranged along a plurality of rails, and adjacent movable shelves move relatively to each other so that a predetermined width is provided between them. A manually-operated movable shelf apparatus in which a passage is formed, wherein a driving wheel and one or a plurality of driven wheels are provided at positions corresponding to the rails at the lower end of the movable shelf, and the rotational force of the operation handle provided on the movable shelf is provided. A rotational force transmission mechanism for transmitting to the drive wheel, the rotational force transmission mechanism comprising a pair of rotating bodies comprising large and small sprockets or toothed pulleys, and an endless cord body comprising a chain or timing belt wound around both rotating bodies A small-sized rotating body that is rotationally driven by the operation handle is non-circular, and a manual moving shelf driving device is provided that includes a slack preventing means for preventing the endless cord from slackening. .

  And, when the bidirectional clutch mechanism is interposed between the shaft portion of the operation handle and the small-diameter rotating body, and the rotational force is applied to the operation handle in any direction, the bidirectional clutch mechanism is In cooperation, the rotational force of the operating handle is transmitted to the small-diameter rotating body (claim 2).

  Here, the small-diameter rotating body has a non-circular outer shape with a 180 ° period in the rotation direction, and the bidirectional clutch mechanism also realizes the linked state of the operation handle and the small-diameter rotating body with a 180 ° period in the rotation direction. It is preferable that the positional relationship with respect to the operation handle in the outer shape of the small-diameter rotating body is always constant in a state where the operating handle and the small-diameter rotating body are linked.

  The outer diameter of the small-diameter rotating body is more preferably an ellipse having a major axis and a minor axis (claim 4).

  Furthermore, it is more preferable that the angle α formed by the short diameter of the small-diameter rotating body is within ± 45 ° with respect to the direction of the operating handle in a state where the operating handle and the small-diameter rotating body are linked.

  The drive device for the manual moving shelf of the invention according to claim 1 as described above is a rotational force transmission mechanism that transmits the rotational force of the operation handle provided on the moving shelf to the driving wheel provided on the lower end of the moving shelf. A pair of rotating bodies consisting of large and small sprockets or toothed pulleys, and an endless cord consisting of a chain or timing belt wound around both rotating bodies, and a small-diameter rotating body that is rotationally driven by the operation handle is non-circular In addition, by adopting a configuration comprising a slack prevention means for preventing the endless cord from slackening, the speed reduction ratio can be changed periodically according to the rotation angle of the operation handle. Reduces the load when moving a heavy moving shelf by optimally setting the relative rotation angle when the small-diameter rotating body that is driven to rotate by the handle and the operation handle are linked. Then, it is to become as can be operated lightly by the user. Further, even when the small-diameter rotating body is made non-circular, the endless cord body is prevented from slacking by the slack preventing means, so that tooth skipping can be prevented between the rotating body and the endless cord body.

  According to claim 2, only when a bidirectional clutch mechanism is interposed between the shaft portion of the operation handle and the small-diameter rotating body and a rotational force is applied to the operation handle in any direction, Since the bidirectional clutch mechanism is linked to transmit the rotational force of the operation handle to the small-diameter rotating body, when the moving shelf is moving in inertia or when the moving shelf moves due to an earthquake or the like, the wheel is used as the starting point. Since the rotational force is not transmitted to the operation handle, the operation handle does not rotate unexpectedly.

  According to claim 3, since the outer shape of the small-diameter rotating body and the linked state of the operating handle and the small-diameter rotating body in the bidirectional clutch mechanism both have a 180 ° period in the rotational direction, The positional relationship with respect to the operating handle in the outer shape of the small-diameter rotating body can always be constant in the state of linkage with the small-diameter rotating body, so that when the user rotates the operating handle, the rotation angle is easy to apply force. A large rotational torque is generated, and a small rotational torque can be obtained at a rotational angle where it is difficult to apply force, and the user can operate lightly on average.

  According to the fourth aspect, since the outer diameter of the small-diameter rotating body is an ellipse having a major axis and a minor axis, the load during rotation of the operating handle is continuously changed at a cycle of 180 °, and operation without a sense of incongruity is possible. It is.

  According to the fifth aspect, the angle α formed by the short diameter of the small-diameter rotating body is within ± 45 ° with respect to the direction of the operating handle in the linked state of the operating handle and the small-diameter rotating body. A large rotational torque can be generated at the time of pushing down which is easy to put.

  Next, the present invention will be described in more detail based on the embodiments shown in the accompanying drawings. FIG. 1 is an overall perspective view of a manual moving shelf driving device according to the present invention, FIGS. 2 to 6 show the outline of the driving device, FIGS. 7 to 15 show details thereof, and reference numeral 1 in the drawing denotes a moving shelf. 2 is a rail, 3 is a passage, 4 is a driving wheel, 5 is a driven wheel, 6 is an operation handle, 7 is a rotational force transmission mechanism, 8 is a small-diameter rotating body, 9 is a large-diameter rotating body, 10 is an endless cord body, Reference numeral 11 denotes a slack preventing means, and 12 denotes a bidirectional clutch mechanism.

  First, the manual movement shelf according to the present invention is arranged such that a plurality of movement shelves 1 are movable along a plurality of rails 2,... A passage 3 having a predetermined width is formed between them. And the drive wheel 4 and the single or several driven wheel 5 are provided in the position corresponding to each rail 2, ... at the lower end of the movement shelf 1, and the rotational force of the operation handle 6 provided in the front middle stage of the movement shelf 1 is the said. A rotational force transmission mechanism 7 for transmitting to the drive wheel 4 is provided. The rotational force transmission mechanism 7 includes a pair of rotating bodies 8 and 9 including large and small sprockets or toothed pulleys, and a chain or timing belt wound around both rotating bodies. The small-diameter rotating body 8 that is rotationally driven by the operation handle 6 is non-circular, and includes a slack preventing means 11 for preventing the endless cord 10 from slacking. It is characterized by that. Here, the slack preventing means 11 employs a method of elastically applying tension to the endless cord body 10.

  More specifically, the movable shelf 1 is provided with a driving wheel 4 that is manually driven to rotate on a carriage 13 and a driven wheel 5 having the same diameter as the driving wheel 4, and a plurality of columns 14,. A storage unit 16 having a normal structure in which shelf plates 15 are held in multiple stages is provided, and a front panel 17 is provided at least on the front side of the storage unit 16. The operation handle 6 is provided in the middle of the front panel 17, the small-diameter rotating body 8 is connected to the shaft portion of the operating handle 6 via the bidirectional clutch mechanism 12, and the large-diameter rotating body 9 is It is provided at the front end of the carriage 13. Here, the bidirectional clutch mechanism 12, the small-diameter rotating body 8, and the large-diameter rotating body 9 are located on the back surface of the front panel 17. A power shaft 18 is fixed to the large-diameter rotating body 9, a rotating shaft 19 is fixed to the drive wheel 4, and the power shaft 18 and the rotating shaft 19 are not shown in the drawing composed of sprockets and chains having different numbers of teeth. They are linked by a speed reduction mechanism.

  Therefore, when the operation handle 6 is rotated, the power shaft 18 is rotated in the same rotation direction as the rotation direction of the operation handle 6 by the sprockets 8 and 9 and the chain 10, and the rotation shaft 19 is further rotated through a speed reduction mechanism. The drive wheels 4 rotate in the same rotational direction, and thus the movable shelf 1 moves in the same direction. That is, when the operation handle 6 is rotated clockwise, the movable shelf 1 moves rightward, and when the operation handle 6 is rotated counterclockwise, the movable shelf 1 moves leftward.

  In the present embodiment, the small-diameter rotating body 8 and the large-diameter rotating body 9 are composed of sprockets, and the endless cable body 10 is composed of a chain. Therefore, in the future, the small-diameter rotating body will be replaced with the sprocket 8 and the large-diameter rotating body. The sprocket 9 and the endless cord will be described as a chain 10. However, a toothed pulley may be used as the rotating body, and a timing belt may be used as the endless cord.

  Actually, the rotational force transmission mechanism 7 is configured by attaching parts other than the sprocket 9 to the support plate 20 attached to the support posts 14 on the front side of the movable shelf 1. Then, the mechanism portion is concealed by the front panel 17, and only the operation handle 6 is exposed to the front side. Here, when the depth of the accommodating portion 16 is wide, as shown in FIGS. 2 and 3, a support 14 is also provided between the support 14 on both sides, and the support plate 20 is positioned at both sides at the middle position. An upper end is attached to the horizontal rail 20A passed between the end struts 14 and 14, and a lower end is attached to the upper surface of the carriage 13, and the sprocket 9 is obeyed so that its power shaft 18 avoids the intermediate strut 14. It is provided close to the driving wheel 5 side. On the other hand, when the depth of the accommodating portion 16 is narrow, as shown in FIGS. 5 and 6, the upper portion of the support plate 20 is directly attached between the support columns 14 and 14 on both side ends, and the lower end portion is the same as described above. It attaches to the upper surface of the trolley | bogie 13, and the said sprocket 9 is provided in the left-right center part in this case. In any case, the front panel 17 is attached using the support columns 14 on both side ends so as to conceal the support plate 20 and the mechanism portion provided on the support plate 20.

  Next, details of each part will be further described. As shown in FIGS. 4 and 7 to 12, the operation handle 6 includes a bidirectional clutch mechanism 12 interposed between a shaft portion 21 and a sprocket 8 (small-diameter rotating body) of the support plate 20. The bidirectional clutch mechanism 12 is linked to transmit the rotational force of the operation handle 6 to the sprocket 8 only when the rotational force is applied to the operation handle 6 in any direction. ing.

  Specifically, a cam wheel 24 that fixes the sprocket 8 to a support shaft 23 that protrudes from a fixing plate 22 that is attached to the upper part of the support plate 20, and a claw mounting disk that is fixed to the shaft portion 21 of the operation handle 6. 25, are coaxially mounted so as to be independently rotatable, engaging portions 27, 27 are projected at 180 ° intervals on the inner peripheral surface of the cylindrical portion 26 of the cam wheel 24, and the operation handle 6 is suspended by its own weight. In this state, both ends of the claw mounting disk 25 are symmetrical on both sides of the upper part of the claw mounting disk 25, and one end of each claw 28, 28 is pivotally mounted, and both the claws 28, 28 are positioned in the cylindrical portion 26 of the cam wheel 24. It is.

  As shown in FIG. 9, one end of the claw 28, 28 is pivotally attached to both upper sides of the claw mounting disk 25 by horizontal pivots 29, 29, and the free end of each claw 28 is engaged with the engagement end. The stopper part 30 that stops against the stepped part of the part 27 and the roller 31 are provided so as to be able to rotate so as to protrude from both sides slightly to the base end side from the corresponding stopper part 30. The claw 28 that hangs down by its own weight on the pivot 29 has the shaft portion in which the roller 31 extends to the inner surface of the cylindrical portion 26 or the inside of the cylindrical portion 26 by the rotation of the claw mounting disk 25 accompanying the rotation of the operation handle 6. 21 is in sliding contact with the outer periphery of 21.

  Then, by rotating the operation handle 6, one of the suspended claws 28 engages with a stepped portion of the engaging portion 27 closest to the rotation direction to rotate the cam wheel 24, that is, to rotate the sprocket 8 To do. Then, while the rotational force is applied to the operation handle 6, the engagement between the claw 28 and the engaging portion 27 is maintained and the rotational force is transmitted to the sprocket 8. Further, when the hand is released from the operation handle 6 at an arbitrary rotational position, the engagement between the claw 28 and the engaging portion 27 is released, and the operation handle 6 returns to the initial state where the operation handle 6 is suspended by its own weight. .

  Here, the sprocket 8 (small-diameter rotating body) has a non-circular outer shape with a 180 ° period in the rotation direction, and the bidirectional clutch mechanism 12 also has a linkage state between the operation handle 6 and the sprocket 8 in the rotation direction. This is realized in a cycle, and the positional relationship of the outer shape of the sprocket 8 with respect to the operation handle 6 is always constant when the operation handle 6 and the sprocket 8 are linked. Specifically, the outer shape of the sprocket 8 is an ellipse having a major axis and a minor axis as shown in FIGS. 2, 5, 9, and 10. Further, as shown in FIGS. 9, 11 and 13, the bidirectional clutch mechanism 12 is formed such that the engaging portions 27, 27 of the cam wheel 24 are separated from each other by a rotation angle of 180 °. . As shown in FIG. 9, the engaging portions 27 and 27 of the cam wheel 24 are positioned in the direction of the long diameter of the sprocket 8. However, since the sprocket 8 and the cam wheel 24 are fixed, this positional relationship is constant. is there.

  When the chain 10 is wound around the sprockets 8 and 9, the slack preventing means 11 is circular, but the sprocket 8 is elliptical, so that the chain 10 is stretched or loosened with rotation. To do. When the chain 10 is loosened, tooth skipping occurs, or the chain 10 meanders and rubs the support plate 20 or the like to generate abnormal noise. For this reason, in order to keep the chain 10 always stretched, it is necessary to elastically apply tension to the middle part of the chain 10. As shown in FIGS. 2, 3, 5, and 6, the slack preventing means 11 of the present embodiment includes a sliding member 33 that is slidable in the lateral direction at both ends of a guide member 32 that is provided horizontally on the support plate 20. , 33, elastically urged by the compression coil springs 34 in the direction in which both sliding members 33, 33 protrude to the side, the chain 10 is spread outward by the sliding members 33, and tension is constantly applied. Yes. In addition, when using a toothed pulley and a timing belt, if the timing belt itself has elasticity, the slack by the non-circular sprocket 8 can be prevented. That is, the expansion / contraction function of the timing belt itself becomes the slack prevention means 11.

  13 and 14 show a mechanism in which the operation handle 6 and the sprocket 8 are linked via the bidirectional clutch mechanism 12. 13 (a) and 14 (a) and 14 (b) show a state in which the clutch mechanism is released and the operation handle 6 hangs down under its own weight. FIGS. The state is shown in which the claw 28 is rotated and the one claw 28 is engaged with the engaging portion 27 located on the lower side, and the clutch mechanism is linked. 14 shows a state in which the operation handle 6 is rotated counterclockwise so that the other claw 28 is engaged with the lower engaging portion 27. Here, as shown in FIG. 14, when the operation handle 6 and the sprocket 8 are linked, the angle α formed by the short diameter of the sprocket 8 with respect to the direction of the operation handle 6 is within ± 45 °. Is set.

  In addition, the rotation state of the sprocket 8 and the cam wheel 24 when the movable shelf 1 is stopped is random. Therefore, when the operation handle 6 is rotated in one direction in order to move the movable shelf 1 in the stopped state, the position where the claw 28 and the engaging portion 27 are engaged is also random. Therefore, it is impossible to set the operation handle 6 so as to start the movement by applying a driving force from the rotation angle at which the force is most easily applied.

  Normally, it can be seen that a certain rhythm exists when the user rotates the operation handle 6 to move the movable shelf 1. FIG. 15 shows the movement speed of the movable shelf 1 when the operation handle 6 is continuously rotated to the right unconsciously when the sprocket 8 is circular (conventional mechanism). ) Only. FIG. 15 (a) shows that when the operation handle 6 is pushed down from the upward state and turned sideways, the carriage is accelerated, moves by inertia until it exceeds the downward direction, and decelerates from the downward direction to the upward direction. When the handle 6 is rotated, a state where it is easy to apply force and a state where it is difficult to apply force appear alternately, and one rotation changes one cycle. On the other hand, in the case where the sprocket 8 is elliptical (invention mechanism), a motor with a torque meter is connected to the shaft portion 21 instead of the operation handle 6, and under the condition of a constant rotational speed (moving speed constant), FIG. 15B shows the change in the load on the motor drive unit over time. In FIG. 15B, the rotation angle in one rotation is shown by the direction of the operation handle 6, and the maximum and minimum of the load appear twice each rotation, that is, the maximum and minimum of the load appear every 180 °.

  15A, when the operating handle 6 is manually rotated, the load can be reduced by making the sprocket 8 oval when the operating handle 6 accelerates rightward. Recognize. During this acceleration, it is easy to apply a force to the operation handle 6. At this time, the load is reduced, and the handle operation becomes light even if the torque is increased and sufficient acceleration is performed. In addition, there is another rotation angle at which the load is minimized. This corresponds to a rotation angle at which the operation handle 6 is moved from the left lateral direction to the upward direction, and it is difficult to apply force to the operation handle 6. Since the load can be reduced, the handle operation is light and a sufficiently large torque can be generated even with a weak force.

  Therefore, in order to confirm the effect of the present invention, 20 users extracted at random were manually moved by a conventional moving shelf having a circular sprocket 8 and an inventive mechanism having an elliptical sprocket 8. Table 1 summarizes the evaluations after actually using the shelves. Here, the number of teeth of the conventional mechanism and the sprocket 8 of the machine is made to coincide. The evaluation has 5 levels, and the smaller the number, the lighter the handle operation was felt. As a result of Table 1, the evaluation of the conventional mechanism is concentrated on 3 and 4, whereas the table of the inventive mechanism is concentrated on 2 and 3, and the operation of the inventive mechanism is significantly lighter than the conventional machine. Results were obtained.

It is a whole perspective view of the manual type movement shelf concerning the present invention. It is a partial front view which shows the outline of the drive device of the manual type movement shelf of this invention. It is a cross-sectional view similarly. It is a longitudinal cross-sectional view similarly. It is a partial front view which shows the outline of the drive device of the manual type movement shelf where the depth width of a storage part is narrow. It is a cross-sectional view similarly. It is a fragmentary sectional view which shows the relationship between an operation handle, a sprocket, and a two-way clutch mechanism. It is a longitudinal section showing the relation between an operation handle, a sprocket, and a bidirectional clutch mechanism. It is the XX sectional view taken on the line of FIG. It is the YY sectional view taken on the line of FIG. It is a fragmentary perspective view which shows the relationship between the cam wheel of a bidirectional | two-way clutch mechanism, and a nail | claw. It is a perspective view which shows an elliptical sprocket. The operation principle of the two-way clutch mechanism is shown, (a) is a partial vertical cross-sectional view of the state where the operation handle and the sprocket are released, and (b) is a partial vertical cross-sectional view of the state where the operation handle and the sprocket are connected. is there. It is explanatory drawing which showed the principle of operation of the two-way clutch mechanism. The middle figure shows the state where the operation handle and the sprocket are released, the left figure shows the state where the operation handle and the sprocket are linked in the right rotation, and the right side. The figure shows a state where the operation handle and the sprocket are linked in the counterclockwise rotation. It is a graph which shows an experimental result, (a) is the measurement result of the bogie speed with respect to time when the operation handle is rotated using a circular sprocket, and (b) is used instead of the operation handle using an elliptical sprocket. It is the measurement result of the drive part load with respect to time when rotating at a fixed rotation speed with a motor.

Explanation of symbols

1 mobile shelf, 2 rails,
3 passages, 4 drive wheels,
5 driven wheel, 6 operation handle,
7 Rotational force transmission mechanism 8 Sprocket (small diameter rotating body),
9 Sprocket (large diameter rotating body), 10 chain (endless cord),
11 loosening prevention means, 12 bidirectional clutch mechanism,
13 trolleys, 14 struts,
15 shelves, 16 housing parts,
17 Front panel, 18 Power shaft,
19 rotating shaft, 20 support plate,
21 shaft part, 22 fixing plate,
23 spindles, 24 cam cars,
25 claw mounting disk, 26 cylindrical part,
27 engaging portions, 28 nails,
29 pivots, 30 stops,
31 rollers, 32 guide members,
33 sliding member, 34 compression coil spring.

Claims (5)

  A manually-operated mobile shelf device in which a plurality of movable shelves are movably arranged along a plurality of rails, and adjacent movable shelves move relatively to form a passage having a predetermined width therebetween. In addition, a driving wheel and one or more driven wheels are provided at a position corresponding to each rail at the lower end of the movable shelf, and a rotational force transmission mechanism that transmits the rotational force of the operation handle provided on the movable shelf to the driving wheel is provided. The rotational force transmission mechanism comprises a pair of rotating bodies consisting of large and small sprockets or toothed pulleys, and an endless cord body consisting of a chain or timing belt wound around both rotating bodies, and has a small diameter that is rotationally driven by the operation handle. A drive unit for a manual moving shelf, characterized in that the rotating body is non-circular and includes a slack preventing means for preventing the endless cord from slackening.   The bidirectional clutch mechanism is linked only when a bidirectional clutch mechanism is interposed between the shaft portion of the operating handle and the small-diameter rotating body and a rotational force is applied to the operating handle in either direction. The driving device for a manual moving shelf according to claim 1, wherein the rotational force of the operating handle is transmitted to the small-diameter rotating body.   The small-diameter rotator has a non-circular outer shape with a 180 ° cycle in the rotation direction, and the bidirectional clutch mechanism also realizes the linked state of the operation handle and the small-diameter rotator with a 180 ° cycle in the rotation direction. 3. The manual moving shelf driving device according to claim 2, wherein the positional relationship of the outer diameter of the small-diameter rotating body with respect to the operation handle is always constant in a state where the handle and the small-diameter rotating body are linked.   The external drive of the said small diameter rotary body is an ellipse which has a long diameter and a short diameter, The drive device of the manual type movement shelf in any one of Claims 1-3. 5. The drive of a manual movable shelf according to claim 4, wherein an angle α formed by the short diameter of the small-diameter rotating body with respect to the direction of the operating handle is within ± 45 ° in a state where the operating handle and the small-diameter rotating body are linked. apparatus.

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