JPH0719221U - Moving rack handle device - Google Patents

Abstract

(57) [Abstract] [Purpose] By cooperating the clutch mechanism and the lock mechanism with the clutch sprocket mounted on the handle shaft,
It is an object of the present invention to provide a handle device that can be downsized and can be easily and reliably locked. [Structure] A lock knob 20a is provided at one end and a lock operation member 21 is provided at the other end, and is fixed to a support shaft 54 and a lock shaft 20 that is arranged parallel to the handle shaft 2 and movable in the axial direction. The lock bracket rotating shaft 22 on the unit frame 55
The lock operation member 21 is rotatably attached by a, and the lock operation member 21 is moved by the movement of the lock shaft 20 in the axial direction.
When the lock metal fitting 22 is formed on the front end portion of the lock metal fitting 22 and is in the laid down status, it engages with the teeth of the clutch sprocket 3. In this case, the handle device of the movable shelf is provided with the lock teeth 23 that disengage the lock teeth 23 in the upright state.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a handle device for a moving shelf, and particularly, by cooperating a clutch mechanism and a lock mechanism with a clutch sprocket mounted on a handle shaft, the device can be downsized, and the lock operation can be performed easily and reliably. It is related to the handle device to be obtained.

[0002]

[Prior art]

 In the handle device of the movable rack, for example, as disclosed in Japanese Utility Model Publication No. 4-45437, when a clutch sprocket is fixed to the drive shaft and a driving force is applied to the handle grip, the clutch sprocket is engaged and the clutch is engaged. A clutch mechanism that disengages the clutch and causes the handle to hang down by its own weight when it is turned on and released from the handle grip, and a hole with a constant pitch is provided along the periphery of the disk fixed to the drive shaft. A lock mechanism for locking or unlocking the rotation of the drive shaft by interlocking the round stopper pin with a stopper handle (lock knob) provided at a position different from the drive shaft. A chain is wound around the driving sprocket fixed to the drive shaft and the driven sprocket to transmit power from the driven shaft to the axle.

[0003]

[Problems to be solved by the device]

 In the conventional handle device for a movable rack described above, the drive shaft has the clutch sprocket that constitutes the clutch mechanism and the disk with the hole that constitutes the lock mechanism that are fixed axially apart from each other. However, there was a drawback that the device could not be downsized. Also, when the lock mechanism that locks the rotation of the drive shaft is activated, the stopper pin axial center may deviate from the hole position of the holed disk depending on the position where the shelf is moved. In such a case, it is necessary to re-apply the driving force to the handle grip and slightly move the shelves to align the positions, which causes a troublesome locking operation. Furthermore, since the lock knob is mounted on the decorative cover within the rotation range of the handle arm at a position different from the handle shaft, if the lock operation is performed while the moving shelf is moving, the clutch will be disengaged. If it is insufficient, there is a safety problem that the handle rotates and hits the hand during the lock operation, resulting in injury, and improvement in design has been desired.

An object of the present invention is to solve the above-mentioned problems of the prior art, to reduce the size of the device, and to provide a handle device for a movable shelf that can perform a locking operation easily and reliably. To do.

[0005]

[Means for Solving the Problems]

 As a means for achieving the above-mentioned object, according to the present invention, the ratchet 15 is engaged with the clutch sprocket 3 attached to the handle shaft 2 by the rotation of the handle 10, and the rotational driving force from the drive sprocket 4 is applied. In a handle device of a movable rack that transmits to a drive wheel 70 via a power transmission mechanism, a lock knob 20a is provided at one end and a lock operation member 21 is provided at the other end, and the handle is moved in parallel with the handle shaft 2 in the axial direction. The lock shaft 20 is rotatably mounted on a unit frame 55 fixed to the support beam 54 by a lock metal fitting rotating shaft 22a, and the lock operating member 21 is moved by moving the lock shaft 20 in the axial direction. It is formed on the front end portion of the lock metal fitting 22 and the lock metal fitting 22 which is rotated by acting on the lock metal fitting 22 and is in a standing state or a fallen state. A handle device for a movable rack, characterized in that it is provided with a lock tooth 23 that engages with the teeth of the clutch sprocket 3 when the tool 22 is in the lying state and releases the engagement when the tool 22 is in the standing state. It is a proposal.

[0006]

[Action]

 By the above means, the clutch sprocket functions together with both the clutch mechanism and the lock mechanism. That is, the clutch mechanism engages the ratchet with the clutch sprocket, transmits the rotational drive force of the handle from the drive sprocket to the drive wheels via the transmission mechanism, and the lock mechanism operates by operating the lock shaft. The lock fitting is rotated so that the lock fitting is in a fallen state so that the lock teeth formed on the front end portion of the lock fitting are engaged with the teeth of the clutch sprocket.

[0007]

【Example】

 Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 3 is a side sectional view of a handle type movable rack 50 provided with the handle device 1 according to the present invention, and FIG. 4 is a front view thereof. The shelf 51 is fixed between the columns 52 at the four corners, and the columns 52 are supported by the carriage frame 53. The handle device 1 is fixed to a support beam 54 attached to a column 52.

FIG. 1 is a side sectional view of the handle device 1, and FIG. 2 is a front view of the handle device 1 with the decorative cover removed. A unit frame 55 is fixed to the support beam 54, and one end of the handle shaft 2 is fixed to the unit frame 55. A clutch sprocket 3 and a drive sprocket 4 which are integrally formed apart from each other in the axial direction are rotatably attached to the handle shaft 2 via a bearing 5. A collar 6 is fitted to the other end of the handle shaft 2 adjacent to the clutch sprocket 3, and a base end portion 7a of a handle arm 7 constituting a handle 10 is rotatably attached via a bearing 8. By fixing the other end (shaft end) of the handle shaft 2 with a nut 9, axial movement of the drive sprocket 4, the clutch sprocket 3, the collar 6 and the handle arm 7 is prevented.

In the handle 10, the handle arm 7 is covered with a handle cover 11, and a grip 12 is attached to the extreme end of the handle arm 7. When not operated, the grip 12 rotates toward the handle arm 7 side and can be folded. A ratchet rotating shaft 13 is rotatably attached to the base end 7a side of the handle arm 7, and a ratchet link 14 forming a ratchet 15 is fixed to the shaft end of the ratchet rotating shaft 13. The ratchet link 14 is formed in the shape of an isosceles triangle (FIG. 2), and the engaging shafts 14a and 14b are attached to both corners of the lower side. The meshing shafts 14a and 14b mesh with the clutch sprocket 3 by the rotation operation of the handle 10 and transmit the rotational force to the drive sprocket 4 to form a clutch mechanism. Reference numeral 16 is a makeup cover.

As shown in FIGS. 3 and 4, an intermediate shaft 61 having a first sprocket 57 at one end and a second sprocket 59 at the other end is supported by a bearing 63 on the carriage frame 53. ing. A chain 65 is wound around the drive sprocket 4 and the first sprocket 57, and the power of the drive sprocket 4 is transmitted to the second sprocket 59 coaxial with the first sprocket 57. Then, a chain 69 is laid between the second sprocket 59 and the third sprocket 67 which is rotatably supported by the carriage frame 53, and is connected to the third sprocket 67 by a shaft (not shown). The drive wheel 70 is rotated to run on the rail 71. As shown in FIG. 2, the drive sprocket 4 and the chain 65 wound around the first sprocket 57 include an adjusting sprocket 73 pivotally supported by the take-up fitting 72 and a screw rod 74 attached to the unit frame 55. The take-up 75, that is, a tensioner, is provided to extend and retract the screw rod 74 to move the adjusting sprocket 73 and properly maintain the tension of the chain 65.

Next, a lock mechanism that prevents the movement of the shelves when the movable shelves are stopped will be described. As shown in FIGS. 1 and 2, the handle shaft 2 is provided with a lock shaft 20 that is movable in the axial direction in parallel with the handle shaft 2. Even if the lock shaft 20 is provided at a position different from the handle shaft 2, the object of the present invention can be substantially achieved. However, in the present embodiment, the hole 2a is formed in the axial direction of the handle shaft 2, and the hole 2a is formed. A lock shaft 20 having a lock knob 20a at one end penetrates through 2a and is axially mounted so as to be movable in the axial direction. The other end of the lock shaft 20 has a stretched plate-like lock operation member 21 fixed to the support beam 54 side. The lock operation member 21 is preferably bent in a hook shape with its upper end portion 21a facing the side where the clutch sprocket 3 is disposed.

On the other hand, the lock fitting 22 is rotatably attached to the unit frame 55 by the lock fitting rotating shaft 22 a, and the upper end 21 a of the lock operating member 21 is attached to the inner surface 22 b of the front end of the lock fitting 22. Is facing. When the lock knob 20a is pulled toward the front, the upper end 21a of the lock operating member 21 pushes the inner surface 22b of the front end of the lock fitting 22 so that the lock fitting 22 falls toward the side where the clutch sprocket 3 is disposed. Rotate. In the present embodiment, two lock teeth 23 are formed at the front end of the lock fitting 22, and when the lock fitting 20a is rotated so as to fall down by the operation of the lock knob 20a, the lock teeth 23 are engaged with the clutch. The positional relationship is such that it engages with the teeth of the vehicle sprocket 4. The unit frame 55 is provided with a notch 55a so as not to interfere with the rotation of the lock fitting 22.

The operation of the handle device for the movable rack having the above structure will be described. First, the clutch mechanism will be described. Referring to FIGS. 1, 2 and 5, when the shelf is stopped, the handle 10 has the meshing shafts 14a and 14b of the ratchet link 14 of the clutch sprocket 3. Since it is away from the teeth, it automatically falls down as shown in FIG. 5 (a). When the handle 10 is rotated in the clockwise direction, for example, in the clockwise direction (the same applies when rotated in the counterclockwise direction), the ratchet 15 causes the rotation angle of the handle 10 due to its own weight. In order to maintain the drooping state irrelevantly, when the handle 10 is rotated by about 90 °, as shown in FIG. 5B, the engagement shaft 14a of the ratchet link 14 has the teeth of the sprocket 3 for the clutch. Then, when the handle 10 is continuously rotated, the drive sprocket 4 integrated with the clutch sprocket 3 is rotationally driven as shown in FIG. Rotate the drive wheels through and move the shelves.

When the rotating operation of the handle 10 is stopped in the middle of the operation and the hand is released, the handle 10 produces a rotational force in the left direction in the figure due to its own weight as shown in FIG. The meshing shaft 14a is automatically disengaged from the teeth of the clutch sprocket 3 and rotates counterclockwise to return to the stopped state of FIG.

Next, a lock mechanism for preventing the movement of the shelf will be described. In the stopped state of the movable shelf, that is, in the state in which the shelf can be freely moved, as shown in FIG. 1, the handle 10 hangs by its own weight, the lock knob 20a is pushed in, and the lock operation member 21 is supported by the support beam. At a position close to 54, the lock fitting 22 is in an upright state.

When the lock knob 20a is grasped and the lock shaft 20 is pulled out to bring it into the locked state, the lock operating member 21 starts to move to the right in FIG. 1, and its upper end portion 21a is first locked. It contacts the inner surface 22b of the front end portion of 22. This state is shown in FIG. Next, the upper end portion 21a of the lock operating member 21 pushes the inner surface 22b of the front end portion of the lock fitting 22, and the lock fitting 22 is moved toward the clutch sprocket 3 installation side as shown in FIG. 6 (b). Incline. The lock fitting 22 further rotates by its own weight so as to incline in the fall direction, and as shown in FIGS. 6C and 7, the lock teeth 23 at the front end portion of the lock fitting 22 are locked from above from the sprocket for the clutch. Engage with 3 teeth. Therefore, the braking force is applied to the clutch sprocket 3, that is, the drive sprocket 4 integrated with the sprocket 3. In this case, even if another movable rack collides and the clutch sprocket 3 starts to rotate due to the rotational force applied thereto, the lock metal fitting 22 with which the lock teeth 23 are engaged has the notch 55a in the unit frame 55. Abutting against and preventing further lateral movement.

To release this locked state, the lock knob 20a is pushed in from the positions shown in FIGS. 6 (c) and 7. The operating state is shown in FIG. When the lock knob 20a is pushed in, the upper end 21a of the lock operation member 21 abuts the inner surface 22c of the rear end of the lock fitting 22 through the lock shaft 20 as shown in FIG. 8 (a). The lock teeth 23 at the front end of the lock fitting 22 are disengaged from the teeth of the clutch sprocket 3 as shown in FIG. Further, when the lock knob 20a is completely pushed in, the lock fitting 22 rotates in the standing direction, hits the supporting beam 54, stops, and returns to the state of FIG.

In the unlocked state in which the lock knob 20a is pushed in and the lock fitting 22 is erected, the center of gravity M of the lock fitting 22 is set so that the lock fitting rotating shaft 22a moves as shown in FIG. 6 (a). As a reference, the clutch sprocket 3 is located on the side opposite to the side where the clutch sprocket 3 is provided, that is, on the side of the support beam 54. When the lock knob 20a is pulled out and the lock fitting 22 is rotated and tilted toward the side where the clutch sprocket 3 is disposed as shown in FIG. 6B, the center of gravity M of the lock fitting 22 is changed to the lock rotation shaft 22a. Based on the above, the lock sprocket 3 is moved to the side where the clutch sprocket 3 is disposed, and the lock fitting 22 falls down due to its own weight, and becomes the fallen state shown in FIG. 6C.

With the above-described configuration, the lock metal fitting 22 in the upright state as shown in FIG. 6A falls to the installation side of the clutch sprocket 3 even though the lock operation is not performed. It is possible to prevent a situation in which the lock is caused. If it is desired to further prevent the lock fitting 22 from falling, a magnet 25 for attracting the lock fitting 22 and the support beam 54 may be provided between the upper back surface of the lock fitting 22 and the support beam 54. On the other hand, by the locking operation, the lock metal fitting 22 in the state shown in FIG. 6 (b) rotates so as to fall down due to its own weight, and the lock tooth 23 at the front end thereof becomes as shown in FIG. 6 (c). The lock teeth 23 mesh with the teeth of the clutch sprocket 3.

In FIGS. 9 and 10, when the lock fitting 22 is rotated to be in the lying state, the lock teeth 23 are not located between the teeth of the clutch sprocket 3 but are placed on the teeth. It shows a state in which the lock state cannot be realized because the engagement is not possible. Even in the case of such a poor meshing, in the present invention, when a slight impact is applied to the moving rack in the traveling direction of the drive wheels 70, the clutch sprocket 3 is slightly rotated, which causes the locking teeth. 23 and the meshing position coincides with each other, and the engagement becomes possible.

[0021]

[Effect of device]

 According to the present invention having the above structure, the ratchet is engaged with the clutch sprocket mounted on the handle shaft, and the clutch drive mechanism transmits the rotational drive force of the handle from the drive sprocket to the drive wheel via the transmission mechanism. The lock shaft is arranged parallel to the handle shaft and movable in the axial direction, and the lock teeth formed on the front end of the lock bracket that is rotatably attached to the unit frame by the lock bracket rotation shaft has the clutch teeth. Since the clutch mechanism is configured to cooperate with the lock sprocket by the clutch sprocket, the lock mechanism is configured to engage with the teeth of the vehicle sprocket and maintain a locked state. Since the disk with holes is unnecessary, the device can be made thinner in the axial direction, and the device can be downsized.

Further, since the lock teeth formed on the front end of the rotatable lock fitting are made to act on the clutch sprocket from above to be locked, the lock operation can be performed easily and surely as compared with the conventional device. You can For example, in the past, when the stopper pin axis was misaligned with the hole position of a holed disk and it was not possible to insert it, the drive force was applied again to the handle grip and the operation of slightly moving the shelves was repeated to perform alignment again. There was a problem that it took time to lock and check the lock.However, in the present invention, when the lock teeth are not properly meshed with the clutch sprocket, the rack is manually impacted and other movable racks are moved. If there is any movement on the shelf to be locked due to the collision, the clutch sprocket will rotate and the locking teeth will engage the clutch sprocket under its own weight and will automatically be in the locked state. This eliminates the need for re-lock operation, saves time and effort for lock operation, and ensures safety without performing lock confirmation operation. Therefore, it is possible to save the time for moving and moving the shelves and improve the work efficiency.

Then, when the center of gravity of the lock fitting is located on the side opposite to the clutch sprocket disposition side with respect to the rotation axis of the lock fitting when the lock fitting is in the upright state, the lock fitting is locked. It is possible to prevent the lock fitting from tipping over to the side where the clutch sprocket is arranged even if the lock operation is not performed in the upright state. In this case, if a magnet is provided between the upper portion of the lock fitting and the supporting beam, the fall prevention of the lock fitting can be further enhanced.

Further, if the lock shaft is configured to be mounted in a hole bored in the axial direction of the handle shaft, for example, the lock operation can be performed while the shelf is moving with the clutch disengaged insufficiently. Even if the handle rotates when it is turned, there is no risk of the handle hitting the hand during the lock operation, and the lock knob is concentric with the handle shaft, giving a good appearance. If the lock operation is performed during high-speed rotation of the moving shelf, the lock teeth are repelled from the teeth of the clutch sprocket, the lock metal fittings are erected by reaction, and the lock is released, resulting in damage to the lock mechanism. Can be prevented.

In addition, since the take-up, which has been separately attached conventionally, is attached to the unit frame and integrated with the handle device, the assembling work is simplified and the cost is reduced.

[Brief description of drawings]

FIG. 1 is a side sectional view of a handle device for a movable shelf according to the present invention.

FIG. 2 is a front view of the handle device of FIG. 1 with a decorative cover removed.

FIG. 3 is a front view of a mobile shelf equipped with a handle device according to the present invention.

FIG. 4 is a side sectional view of a movable rack equipped with a handle device according to the present invention.

FIG. 5 is an operation explanatory view of the clutch mechanism of the handle device according to the present invention.

6 (a), (b) and (c) are side sectional views for explaining the operation of the lock mechanism of the handle device according to the present invention.

FIG. 7 is a front view of FIG. 6 (c).

8A and 8B are side sectional views for explaining the operation of the lock release mechanism of the handle device according to the present invention.

FIG. 9 is a side sectional view showing a state where lock teeth are not located between the teeth of the clutch sprocket and cannot be engaged in the lock mechanism of the handle device according to the present invention.

10 is a front view of FIG. 9. FIG.

[Explanation of symbols]

 1 ... Handle device 2 ... Handle shaft 2a ... Hole 3 ... Clutch sprocket 4 ... Driving sprocket 6 ... Collar 7 ... Handle arm 9 ... Nut 10 ... Handle 15 ... Ratchet 20 ... Lock shaft 20a ... Lock knob 21 ... Lock operation member 22 ... Lock metal fitting 22a ... Lock metal fitting rotating shaft 23 ... Lock tooth 50 ... Handle type movable shelf 51 ... Shelf 52 ... Strut 53 ... Truck frame 54 ... Support beam 55 ... Unit frame 55a ... Notch 70 ... Drive wheel 74 ... Screw rod 75 ... Take up

Claims (4)

[Scope of utility model registration request] 1. A handle device for a movable rack, wherein a ratchet is engaged with a clutch sprocket mounted on a handle shaft by the rotation of the handle, and the rotational drive force is transmitted from the drive sprocket to a drive wheel via a transmission mechanism. Has a lock knob at one end and a lock operation member at the other end,
The lock shaft is arranged parallel to the handle shaft and is movable in the axial direction, and it is rotatably attached to the unit frame fixed to the support beam by the lock metal fitting rotating shaft, and is locked by moving the lock shaft in the axial direction. The operating member acts on the lock fitting to rotate it, and the lock fitting that is in the upright position or the fall position and the front end of the lock fitting are formed on the teeth of the clutch sprocket when the lock fitting is in the fall position. A handle device for a movable shelf, comprising: locking teeth that engage with each other and release the engagement when in an upright state. 2. The handle device for a movable rack according to claim 1, wherein the lock shaft is mounted in a hole bored in the axial direction of the handle shaft. 3. The center of gravity of the lock fitting is located on the opposite side of the clutch sprocket mounting side with respect to the lock fitting rotating shaft when the lock fitting is in the upright state. Item 3. A handle device for a movable shelf according to item 2. 4. The handle device for a movable rack according to claim 3, wherein a magnet for maintaining the lock fitting in an upright state is provided between the upper portion of the lock fitting and the support beam.