JP4528530B2 - Manual moving shelf device - Google Patents

Description

  The present invention relates to a manual moving shelf apparatus in which a moving shelf is moved by manually rotating an operation handle.

  As a conventional manual moving shelf device of this type, the operation handle protruding outward from the side wall of the moving shelf is linked to the wheels of the moving shelf via a clutch and transmission means that can be switched between a meshing state and a non-meshing state. In this clutch engagement state, a manual moving shelf device that can move the moving shelf by rotating the operation handle by rotating the operation handle is already known (see, for example, Patent Document 1). .

In the clutch described in Patent Document 1, a toothed disk (clutch disk) having a plurality of teeth is fixed to a rotation shaft that pivotally supports the rotation base of the operation handle. On the side, a pair of hook arms having hooks that can mesh with teeth are arranged at symmetrical positions. When the operation handle is rotated, the hook arm is tilted by its own weight, meshed with the toothed disk, and the rotation of the operation handle is transmitted to the wheel to move the movable shelf.
Japanese Utility Model Publication No. 60-6261

However, the clutch described in Patent Document 1 has a time lag until the hook arm is rotated by its own weight and the hook arm is tilted by its own weight and meshed with the toothed disk. It is necessary to idle the operation handle to a certain extent before it starts to move. For this reason, not only does the movement operation take time, but when the operation handle is quickly turned, the hook arm opens to the outside due to the centrifugal force, and a so-called idling phenomenon that does not engage with the toothed disk occurs.
If the number of teeth of the toothed disk is increased as much as possible, the meshing of the hook arm becomes faster and the time lag as described above can be reduced. As a result, there is a problem that the diameter and weight of the operation handle are increased.

  In view of the above problems of the prior art, the present invention reduces the time lag from the start of turning the operation handle until the movable shelf starts to move, and even if the operation handle is turned quickly, it does not fluctuate. In addition, an object of the present invention is to provide a manual moving shelf device that can reduce the diameter of the clutch disk.

According to the present invention, the above problem is solved as follows.
(1) An operation handle attached to a side wall of a moving shelf so as to rotate about a horizontal rotation axis is linked to a wheel of the moving shelf via a clutch and a transmission means, and the operation handle is rotated. In the manual type moving shelf apparatus in which the wheel is rotated to move the moving shelf, the clutch is rotatably supported by a rotating shaft, linked to the wheel, and a base portion in the circumferential direction on the inner periphery The width of the tip gradually becomes larger than the width of the clutch, the clutch disk having teeth whose both meshing surfaces are inclined symmetrically, and the rotation base of the operation handle are swingably attached, and the operation handle is rotated. And a pair of hook arms meshing with the teeth of the clutch disk.

(2) In the above item (1), of the pair of hook arms, the hook arm on the opposite side of the hook arm meshing with the teeth of the clutch disk is restrained so as not to mesh with the teeth. Means are provided.

(3) In the above item (1) or (2), the restraining means is a rotation base portion of the operation handle and is swingably attached between both hook arms. The engaging projection is formed on the notch portion of the hook arm opposite to the hook arm that meshes with the teeth of the clutch disk when the operation handle rotates. Are engaged to restrain the hook arm in a non-engagement state.

(4) In any of the above items (1) to (3), a surface on the same side as the rotation direction of the rotation base of the operation handle is an engagement surface that meshes with the teeth of the clutch disk at the tip of the hook arm. And the nail | claw which made the surface on the opposite side to a rotation direction into the inclined surface which does not mesh | engage with this tooth | gear is provided.

(5) In any one of the above items (1) to (4), the centering portion of the operation handle can swing between a storage position substantially parallel to the operation handle and a protruding position protruding forward. An operation knob is provided.

(1) According to the first aspect of the present invention, the clutch is constituted by the clutch disk having teeth on the inner periphery and the pair of hook arms that mesh with the teeth of the clutch disk when the operation handle is rotated. So, if the centrifugal force acts on the hook arm when the operation handle rotates, the hook arm inevitably operates to mesh with the teeth, so that even if the operation handle is rotated quickly, there is no occurrence of a meshing error such as idling. Moreover, since the centrifugal force acts to engage the hook arm with the teeth, a reliable clutch operation is performed.

  In addition, since the teeth of the clutch disk are arranged outside the hook arm, the number of teeth can be increased without increasing the diameter of the clutch disk. As a result, when the operation handle is turned, the hook arm immediately meshes with the teeth. The time lag from when the operation handle is turned to when the movable shelf starts to move can be almost eliminated.

(2) According to the second aspect of the present invention, since the restraining means for restraining the hook arm on the side opposite to the hook arm meshing with the teeth of the clutch disk so as to be unable to mesh is provided, both hook arms Double meshing can be prevented, and the operation handle can be prevented from rotating when the moving shelf moves quickly due to inertia.

(3) According to the invention described in claim 3, the restraining arm is swingably mounted between the hook arms so that the engaging protrusion engages with the notched portion of the non-meshing hook arm when the operation handle rotates. As a result, the hook arms that are not meshed can be reliably restrained to the non-meshing state by this engagement.

(4) According to the invention described in claim 4, at the tip of the hook arm, the surface on the rotation direction side is an engagement surface that meshes with the teeth of the clutch disk, and the surface on the opposite side to the rotation direction is not inclined with the teeth. Since the claw is provided as a surface, even when the moving shelf moves faster than the operation handle, it is possible to avoid the teeth of the clutch disk sliding on the inclined surface and the operation handle being rotated around the hook arm. .

(5) An operation knob that swings between a storage position that is substantially parallel to the operation handle and a protruding position that protrudes forward is provided at the upper end of the operation handle. Ordinarily, by folding in a parallel position, it is possible to prevent a person or an object from colliding with the operation knob.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of an embodiment of a manual movable shelf apparatus according to the present invention. On the rail (1), three movable shelves (2) and one fixed shelf (3) are arranged in parallel, and three of the movable shelves (2) have their side walls (2a ) Can be moved left and right on the rail (1) by rotating the operation handle (4) provided in the left or right direction.

  On the top of each movable shelf (2), a fall prevention rail (5) is stretched, and each movable shelf (2) has a ring (not shown) provided on the top for preventing the fall ( 5), it is possible to prevent overturning especially when moving to a stop state. The stored item (6) is placed on each shelf plate (7) of the movable shelf (2).

  Inside the movable shelf (2), a sprocket (8) is pivotally fitted on a rotating shaft (14) (see FIG. 2 and subsequent figures) attached to the rotation center of the operation handle (4). 8) and two sprockets (9) coaxial with the wheel (not shown) on the rail (1), a chain (10) is wound around. Therefore, when the sprocket (8) is rotated, the torque is transmitted to the sprocket (9) through the chain (10), and the wheel on the rail (1) rotates to travel the movable shelf (2). The sprockets (8), (9) and the chain (10) form transmission means for transmitting the rotational force of the operation handle (4) to the wheels.

2 is a longitudinal side view showing the internal mechanism of the operation handle (4) shown in FIG. 1, and FIG. 3 is a sectional view taken along line III-III in FIG.
The operation handle (4) is provided with a pair of left and right operation arms (4b) on the upper part of a disk-shaped rotation base (4a). The rotation base (4a) is moved to a movable shelf via a bearing (11). It is rotatably attached to the side wall (2a) of (2). A knob (4d) is swingably attached to the upper end of the operation arm (4b) via a shaft (4c) .When not in use, it is parallel to the operation arm (4b). It is housed inside (housing position) and is projected to a projecting position indicated by a chain line in FIG.

  A clutch base (12) is fixed to the back surface of the rotation base (4a) via a set screw (13). A rotation shaft (14) whose axis coincides with the rotation center of the rotation base (4a) is fixed to the center of the clutch base (12). A pair of hook arms (16A) having pawls (17) that can be rotated about an axis (15) projecting from an eccentric portion of the clutch base (12) and mesh with teeth (20) described later. (16B) is disposed at a symmetrical position with respect to the center line (L) of the operation handle (4) orthogonal to the rotation axis (14). The claw (17) has a surface on the same side as the rotation direction of the rotation base (4a) as an engagement surface (17a) and a surface opposite to the rotation direction as an inclined surface (17b). The inner end edge of each hook arm (16A) (16B) is in contact with the stopper (18) protruding from the clutch base (12) so that it does not move further to the rotating shaft (14) side. .

The sprocket ( 8 ) described above is attached to the outer periphery of the tip of the rotating shaft (14) via a bearing (19). A clutch disk (21) having a plurality of teeth (20) formed on the inner periphery is fixed to the outer periphery of the boss portion (8a) of the sprocket (8). Each tooth (20) is formed such that the width of the tip gradually becomes larger than the width of the base portion in the circumferential direction, and both meshing surfaces are inclined symmetrically.

  The hook arms (16A) and (16B) have a notch (22) at the inner edge near the shaft (15). Between the hook arms (16A) and (16B), a restraining arm (24) is pivotally attached to the clutch base (12) with a shaft (23) at a portion closer to the rotation shaft (14) than its center of gravity. The restraining arm (24) is arranged so that the lower end portion, that is, the protruding portions (24a) formed on the left and right of the end portion on the rotating shaft (14) side face the notch portion (22).

  A weight (25) is embedded in the rotation base (4a). Because of this weight (24), the center of gravity of the operation handle (4) is below the rotation axis (14) in FIG. In the non-engagement state where the hooks (16A) and (16B) are not engaged with the teeth (20) and located on the opposite side to the operation arm (4b) with respect to (14), the operation arm (4b) It is supposed to be located.

4 is a cross-sectional view of the main part when the operating handle is slightly rotated counterclockwise from the state shown in FIG.
If the operation handle (4) is turned counterclockwise as shown by the arrow (26), the left hook arm (16A) swings clockwise around the shaft (15) as indicated by the arrow (27) due to its own weight and inertia. As a result, the engagement surface (17a) of the claw (17) of the left hook arm (16A) meshes with the teeth (20) of the clutch disk (21), and the clutch is engaged. The restraining arm (24) swings counterclockwise around the axis (23) due to its own weight and inertia, so that the right protrusion (24b) of the restraining arm (24) becomes the right hook arm (16B). The right hook arm (16B) is blocked by engaging with the notch (22). For this reason, the right hook arm (16B) and the teeth (20) do not mesh with each other, thereby preventing double meshing.

  Due to inertia, the moving shelf (2) may move faster than the rotational speed of the operating handle (4), or the moving shelf (2) may continue to move even if the operating handle (4) stops rotating. In this case, the clutch disk (21) continues to rotate in the direction of the arrow (26) while the rotation of the clutch base (12) to which the hook arms (16A) (16B) are attached is stopped. At this time, the inclined surface (17b) formed on the rear end edge of the claw (17) of the hook arm (16A) in which the teeth (20) of the clutch disk (21) are engaged is pushed, and the hook arm (16A) The shaft (15) is pivoted in the opposite direction to the arrow (27) to disengage from the teeth (20). Since the non-meshing hook arm (16B) is restrained by the restraining arm (22) in the non-meshing state, the clutch disk (21) can rotate freely, and the operating handle (4) has a rotational force. Is not transmitted.

  If the counterclockwise rotation of the operation handle (4) is continued, the left hook arm (16A) will continue to engage with the teeth (20) again, so that the clutch disk (21) is similar to the operation handle (4) with an arrow ( Rotate counterclockwise as shown in 26).

  When the operation handle (4) is rotated clockwise from the state of FIG. 4, the clutch base (12) rotates clockwise, and the inclined surface (17b) of the claw (17) of the left hook arm (16A) While overcoming the tooth (20) and the right hook arm (16B) is rotated while being restrained by the restraining arm (24), the state shown in FIG. 3, ie, the hook arms (16A) and (16B) are disengaged, The restraining arm (24) returns to an upright and unconstrained state. When the operation handle (4) is rotated clockwise from the state shown in FIG. 3, the operation opposite to that shown in FIG. 4 is performed, that is, the right hook arm (16B) meshes with the teeth (20) and the left hook arm ( The clutch disk (21) rotates clockwise while 16A) is restrained by the restraining arm (24).

  The present invention is not limited only to the above-described embodiments, and various modifications are possible. For example, the clutch disk (21) may have a configuration in which teeth are provided on the inner surface of the rim portion of the wheel instead of the configuration in which the teeth (20) are attached to the disc. Further, the operation handle (4) may be a circular handle without the operation arm (4a).

It is a perspective view of one embodiment of the present invention. Similarly, it is a vertical side view of an operation handle and a clutch part. Similarly, it is the III-III sectional view taken on the line of FIG. Similarly, it is sectional drawing when an operation handle is rotated.

Explanation of symbols

(1) Rail
(2) Moving shelf
(2a) Side wall
(3) Fixed shelf
(4) Operation handle
(4a) Rotation base
(4b) Operation arm
(4c) axis
(4d) Knob
(5) Fall prevention rail
(6) Items stored
(7) Shelf board
(8) Sprocket
(9) Sprocket
(10) Chain
(11) Bearing
(12) Clutch base
(13) Set screw
(14) Rotating shaft
(15) axis
(16A) (16B) Hook arm
(17) Nail
(17a) Engagement surface
(17b) Inclined surface
(18) Stopper
(19) Bearing
(20) Teeth
(21) Clutch disc
(22) Notch
(23) Axis
(24) Restraint arm
(24a) Projection
(25) Weight
(26) Arrow
(27) Arrow

Claims (5)

An operation handle attached to a side wall of the moving shelf so as to rotate about a horizontal rotation axis is linked to a wheel of the moving shelf via a clutch and transmission means, and the wheel is moved by rotating the operation handle. In the manual type moving shelf device that rotates and moves the moving shelf,
The clutch is rotatably supported on a rotating shaft, linked to the wheel, and the tip width is gradually larger than the width of the base in the circumferential direction on the inner periphery, and both meshing surfaces are symmetrically inclined. And a pair of hook arms that are swingably attached to the rotation base of the operation handle and mesh with the teeth of the clutch disc when the operation handle is rotated. Features a manual moving shelf device.   A restraining means is provided for restraining a hook arm on the opposite side of the pair of hook arms that is engaged with the teeth of the clutch disk so that the hook arms cannot be engaged with the teeth. Item 2. The manual moving shelf apparatus according to Item 1.   The restraining means is a rotation base portion of the operation handle and is swingably attached between the both hook arms, and an engagement protrusion that engages with a notch portion formed on the hook arm at the end on the rotating shaft side. When the operating handle rotates, the engaging projection engages with the notch portion of the hook arm opposite to the hook arm that meshes with the teeth of the clutch disk, and the hook arm is brought into the non-engaged state. The manual moving shelf apparatus according to claim 1 or 2, characterized in that it is restrained.   At the tip of the hook arm, the surface on the same side as the rotation direction of the rotation base of the operation handle is used as an engagement surface that meshes with the teeth of the clutch disk, and the surface opposite to the rotation direction is inclined so as not to mesh with the teeth. The manual moving shelf apparatus according to any one of claims 1 to 3, wherein a claw as a surface is provided. 5. An operation knob that is swingable between a retracted position that is substantially parallel to the operation handle and a protruding position that protrudes forward is provided at an eccentric portion of the operation handle. The manual moving shelf apparatus according to the above.

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