JPH0620430Y2 - Moving rack locking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a locking device for a moving shelf, and more specifically,
The present invention relates to a structure for holding a lock member in a locked position and an unlocked position.

(Prior Art) As is well known, in a shelf used as a storeroom, a rotary operation handle is rotated to transmit the rotation direction to, for example, a speed reduction mechanism, and rotationally drive a traveling wheel located at a final speed reduction stage of the speed reduction mechanism. There is a moving shelf that moves the shelf on the rail by doing.

In the above-mentioned moving rack, a locking device may be equipped so as not to run unintentionally. As a moving rack equipped with such a locking device,
There is a structure shown in FIGS. 5 to 9.

That is, FIG. 5 shows an appearance of the above-mentioned movable shelf, and the movable shelf 1 is mounted on the underframe 2 and a plurality of columns 3 fixed on the underframe 2 and between these columns 3. The shelf board 4 is provided.

A rotation operation handle 5 projects from a side surface of the movable shelf 1. The rotation operation handle 5 is rotated by an operator so as to be rotatable in the underframe 2 via a transmission mechanism (not shown). The traveling wheels (not shown) that are supported are rotationally driven to move the movable rack 1 on rails 6 laid on the floor. For this reason,
In the transmission mechanism described above, a speed reduction mechanism is used for the purpose of converting the rotational force from the rotary operation handle 5 into the moving force of the rack which is a heavy object. In addition, a large number of the above-mentioned movable shelves 1 are placed side by side on the rail 6, and a passage for work is formed only between necessary shelves, and the other shelves are placed in a dense state to effectively use a limited indoor space. You can do it.

On the other hand, the above-described rotary operation handle 5 is integrated with the boss 8 via the spokes 7, and the operation knob 9 is provided at the center of the boss 8 so as to be slidable therethrough in the thickness direction thereof. The operation knob 9 is connected to a lock device described later.

That is, as shown in FIG. 6, the locking device includes a pipe shaft 11 penetrating the side plate 10 of the movable shelf 1, a lock operating member 12 axially inserted in the pipe shaft 11, and the lock operating member.
The lock operation member 12 is moved by the movement of 12 in the axial direction described above.
And the drive wheel 13 which is set in the engaged and disengaged positions.

The above-described tube shaft 11 is rotatably supported via the bearings 15 and 16 between the side plate 10 and the inner wall 14 positioned inside the side plate with a space between the side plate 10 and one end in the axial direction, that is, ,
The above-mentioned boss 8 is fixed to the outer peripheral surface of the end portion projecting outward from the side plate 10, and the outer peripheral surface between the side plate 10 and the inner wall 14 in the axial direction is a sprocket as a drive wheel. A wheel 17 and a braking wheel 13 as a braking member are fixed.

Therefore, the rotation of the rotary operation handle 5 is transmitted to the sprocket wheel 17 and the braking wheel 13 via the tube shaft 11, and the rotation transmitted to the sprocket wheel 17 transmits power to the traveling wheels via a chain (not shown). It is transmitted to a deceleration mechanism (not shown) provided in the.

Further, the lock operation member 12 described above is composed of a shaft member slidably inserted along the axial direction of the tube shaft 11, and projects inward from the inner wall 14, in other words, in the back of the shelf. Part 12
A is once bent in a direction orthogonal to the above-mentioned tube axis 11 direction to have an L-shaped side view, and an arm portion 12A formed of this bent portion is formed. Further, a tip portion 12B of the arm portion 12A is formed.
It is folded back in the direction of the pipe axis 11 at a right angle to the inner wall 14 side, is inserted into a hole 14A formed in the inner wall 14 and faces the braking wheel 13.

As shown in FIG. 7, the braking wheel 13 described above is made up of a disk, and has a large number of notches along the circumferential direction at its peripheral portion.
13A are formed at equal intervals.

Therefore, the lock operating member 12 moves in the axial direction of the tube shaft 11 to move the tip end portion 12B into the notch 13A of the braking wheel 13 in the locked position and the unlocked position where the notch 13A is pulled out. It is designed to be selectively displaced.

In such a structure, the operation knob 9 is shown in FIG.
As shown by the solid line, when the state where the tip portion 12B of the lock operating member 12 is pulled out from the notch 13A of the braking wheel 13 by pushing it toward the side plate 10 is set, the sprocket wheel 17 is rotationally driven by the rotary operation of the rotary operation handle 5. It is possible to move the movable rack 1 through the rotation of the sprocket wheel 17. As described above, when the lock operating member 12 and the braking wheel 13 are in the disengaged state, the tip portion 12B of the lock operating member 12 is fitted into the hole 14A of the inner wall 14, so that the so-called rotation stop is performed. The rotation of the rotation operation handle 5 is not affected by the torque obtained from the weight of the lock operation member 12, and thus can be performed lightly.

On the other hand, by pulling out the operation knob 9 in the direction away from the side plate 10 as shown by the chain double-dashed line in FIG.
When the state in which the tip portion 12B of 12 is engaged with one of the notches 13A of the braking wheel 13 is set, the rotation of the braking wheel 13 is prevented by the lock operation member 12 which is in the non-rotatable state by the hole 14A of the inner wall 14. Be detained. Therefore, the sprocket wheel 17 that is substantially integrated with the braking wheel 13 and the reduction mechanism that receives the rotational force from the sprocket wheel 17 are locked, and the traveling of the movable rack 1 is prevented. Such a locking operation of the moving shelf 1 can be performed even when the moving shelf is to be stopped urgently. In that case, the locking operation member
Since 12 and the operation knob 9 integrated therewith are non-rotatably restrained, the traveling of the movable shelf can be stopped instantaneously.

Further, as another example of the above-mentioned lock structure, there is a structure shown in FIGS. 8 and 9.

The structure shown in FIG. 8 differs from the structure shown in FIG. 6 in that the brake wheel 18 substantially integrated with the pipe shaft 11 is located farther than the inner wall 14 and in the circumferential direction as shown in FIG. That is, the peripheral edge of the braking wheel 18 having a large number of notches 18A formed along it is bent.

Also in such a structure, as in the case described above, when the operating knob 9 is pulled out, the lock operating member 12 moves in the axial direction of the tube shaft 11 and its tip portion 12B is one of the notches 18A of the braking wheel 18. To lock the rotation of the sprocket wheel 17 to disable the traveling of the movable rack 1 (for example, Japanese Utility Model Publication No. 61-8735).

(Problems to be solved by the invention) By the way, in any of the structures of the above-described lock device, in any case, by pulling out or pushing in the operation knob 9, the tip portion 12B of the lock operation member 12 and the braking wheels 13, 18 are released. The lock position or the non-lock position with the notches 13A and 18A is set, but in setting both positions, it is necessary to slide the lock operating member 12 in the tube shaft 11. .

Therefore, a gap for allowing sliding is present between the inner peripheral surface of the pipe shaft 11 and the outer peripheral surface of the lock operating member 12, and the existence of this gap causes the following problems. Invite.

That is, even if the operation knob 9 integral with the lock operation member 12 is pushed to extract the tip portion 12B from the notch 13A of the braking wheel 13, the lock operation member 12 has a so-called rattling due to the above-mentioned gap, Due to the presence of the body, the tip portion 12B which is completely separated from the braking wheel 13 may come into contact with the braking wheel 13 again due to the vibration generated when the shelf is moved.

On the contrary to such a case, even if the operation knob 9 is pulled out and the tip portion 12B is engaged with the notch 13A of the braking wheel 13, if the operation knob 9 is inadvertently touched, the notch 13A
It may come off from.

Therefore, noise may be generated when the shelf is moved in the unlocked state, or the lock may be unlocked in the locked state.

Therefore, an object of the present invention is to reliably set a locked state and a non-locked state in view of the above-mentioned problems in the lock device, and prevent generation of noise during unnecessary unlocking and moving of the movable shelf. The purpose is to obtain a locking device for a moving shelf that can be

(Means for Solving the Problems) In order to achieve this object, the present invention provides a tube shaft rotatably supported on a side portion of a movable shelf, and a tube shaft integrally provided on the tube shaft for manual rotation operation. And a drive wheel that is integrally provided on the pipe shaft and that transmits the rotational driving force of the rotary operation handle to the traveling wheels to travel the moving shelf, and the pipe shaft. It is provided so as to penetrate in the direction, and can be reciprocated in the tube axis direction by manual operation at the rotation center of the rotation operation handle, but the end protruding from the rear end of the tube axis is bent. And a lock operation member that is non-rotatably provided by being inserted into the immovable portion and the pipe shaft. The lock operation member is engaged by the reciprocating motion of the lock operation member in the pipe axis direction. Take off the drive wheel It has a braking member that locks non-rotatably and that releases the constraint, and a tip that appears in the reciprocating path of the bending portion of the lock operating member, and this tip is the braking member and the lock operating member. It is proposed to provide a position holding member formed of an elastic body having a length that reaches the position of the bent portion when and are engaged.

(Operation) According to the present invention, when the state in which the lock operating member is engaged with the braking member is set, the tip of the position holding member elastically engages with a part of the peripheral surface of the arm portion of the lock operating member. Hold the locked position. On the other hand, when the lock operation member is moved from this state in the direction of releasing the engagement with the braking member, the tip of the position holding member is elastically deformed to allow the movement of the lock operation member and the peripheral surface of the arm portion. The unlocked position is held by elastically engaging a part of the peripheral surface opposite to the part.

(Embodiment) Hereinafter, the details of the embodiment of the present invention will be described with reference to FIGS. In addition, in the drawings from FIG. 1 onward, it is to be noted that the same components as those shown in FIGS. 6 to 7 are designated by the same reference numerals.

FIG. 1 is a local cross-sectional view in plan view for explaining a main part of a lock device according to an embodiment of the present invention.

In FIG. 1, the lock device according to the present embodiment is provided with a position holding member 20 formed of an elastic member having a tip protruding in the reciprocating path of the arm 12A of the lock operating member 12. I am trying.

That is, the position holding member 20 described above is composed of the case 20A having a space inside and the holding piece 20B located in the space of the case 20A.

The case 20A described above is fixed to the back surface of the inner wall 14 shown in FIG. 6, faces the arm portion 12A of the lock operating member 12, and is parallel to the reciprocating direction of this portion 12A, as shown in FIG. An opening 20A3 is formed by cutting an intersection of the side 20A1 that is formed with the side 20A2 that is perpendicular to the side 20A1 and is away from the inner surface of the inner wall 14 in the direction perpendicular to the side 20A1.

The cut length at each side forming the opening 20A3 serves as a portion that restricts the movement of the holding piece 20B described later,
In the case of the present embodiment, the cutting length on the side 20A1 side is such that when the lock operation member 12 is pushed in, the head portion of the holding piece 20B faces the inner wall 14 side of the bent portion 12A at the movement completion position, and the arm portion 12B.
The length is set so that A can be kept pressed in, and the side 2
The cut-out length on the 0A2 side is set so that the head of the holding piece 20B can be retracted to a position that does not hinder the movement of the bent portion 12A when the lock operating member 12 is pushed.

The holding piece 20B described above is composed of a leaf spring whose shape in plan view is an inverted S shape, and one of the heads of this S shape is projected from the opening 20A3 of the case 20A described above and the arm portion. 12A
The other head is located inside the case 20A and biases one head toward the inner wall 14 side.

This holding piece 20B is not fixed in the case 20A,
It is set so that it can move freely, and when the head protruding outward from the opening 20A3 is displaced by external force,
Within the size of the opening 20A3, it follows freely to cause so-called rattling, and when the extension connecting the heads abuts the edge of the opening and the movement is restricted, one's habit It can be bent by.

In FIG. 2, reference numeral 14B is a hole facing the case 20A side.
It shows a notch formed in the edge portion of 14A, and this notch 14B constitutes an escape portion for entering when the holding piece 20B bends toward the inner wall 14 side.

Since the present embodiment has the above-described structure, the operation knob 9
Is pulled away from the side plate 10, and when the so-called tip portion 12B of the lock operating member 12 is engaged with one of the notches 13A of the braking wheel 13, as shown in FIG. 3 (A),
The position holding member 20 includes a bent portion 12A of the head of the holding piece 20B.
It appears in the reciprocating motion path. Therefore, when the bent portion 12A tries to move in the direction in which the tip portion 12B is about to come out of the notch 13A of the braking wheel 13, the arm portion 12A moves to the holding piece 20A.
It interferes with B's head and is blocked from moving in that direction when no external force is applied to release this interference.

On the other hand, when the operating knob 9 is pushed in and the tip portion 12B of the lock operating member 12 comes out of the notch 13A of the braking wheel 13, the arm portion 12
A moves as shown in FIG. 3 (B). Therefore, the holding piece 20B of the position holding member 20 has its head portion interfered with the arm portion 12A, but at this time, an external force sufficient to cancel the interference is applied, so that it is pushed in the movement direction of the arm portion 12A. Is set to a state in which the movement of the arm 12A is not hindered until the arm 12A is displaced and comes into contact with the opening edge by using the cut length of the side 20A2 in the opening 20A3.

Immediately before the arm 12A completely moves, the above-mentioned holding piece 20B abuts on the opening edge and the displacement is interrupted, and thereafter, the holding piece 20B bends around the opening edge as a fulcrum and is bent from the arm 12A. Appear on the 12A round trip.

Therefore, the arm 12A that has completely moved is elastically engaged with the inner wall 14 side by the holding piece 20B and is prevented from moving to the inner wall 14 side.

The locking of the arm 12A by the holding piece 20B described above applies a force equal to or greater than the urging force of the holding piece 20B when the operation knob 9 is pulled out again, so that the case 20A of the position holding member 20 can be locked.
The holding piece 20B comes into contact with the opening edge on the side 20A1 side and is bent and released.

According to this embodiment, the holding piece 20 of the position holding member 20
B has a simple structure in which it can be fitted into the case 20A, and the number of parts can be reduced.

The head portion of the holding piece 20B described above is not limited to be formed by simply bending a leaf spring, and a rotatable roller may be attached to this portion. In this case,
The rubbing resistance between the holding piece and the arm 12A is reduced,
2A can be moved smoothly.

Further, as shown in FIG. 4 in place of the head, the roller support 30 having a roller 30A at the tip is used for the case 20A described above.
A structure may be adopted in which the roller 30A is inserted into the inside and is pushed by the spring 31 so that the roller 30A is exposed in the reciprocating path of the arm 12A.

As described above, according to the present invention, when the state in which the lock operating member is engaged with the braking member is set, the tip of the position holding member is elastically attached to a part of the peripheral surface of the arm portion of the lock operating member. To hold the locked position. On the other hand, when the lock operation member is moved from this state in the direction of releasing the engagement with the braking member, the tip of the position holding member is elastically deformed to allow the movement of the lock operation member and the peripheral surface of the arm portion. Since it holds the unlocked position by elastically engaging a part of the peripheral surface on the side opposite to the part, noise is generated due to rattling of the lock operating member during unnecessary unlocking and movement of the moving shelf. Can be prevented in advance. Further, since the position holding member is not always loaded by the weight of the lock operating member at the locked position and the unlocked position, the durability of the position holding member can be improved. Further, since the position holding member is disposed in the vicinity of the arm portion whose tip appears in the reciprocating path of the arm portion, that is, outside the mechanical portion of the lock device,
Maintenance such as disassembly can be easily performed.

[Brief description of drawings]

FIG. 1 is a schematic local sectional view showing an essential part of a locking device according to an embodiment of the present invention, FIG. 2 is a sectional view showing details of a position holding member used in the essential part shown in FIG. 1, and FIG. 1A is a cross-sectional view corresponding to FIG. 1 for explaining one mode of the main part shown in FIG. 1, and FIG. 3B is another cross-sectional view of the main part shown in FIG. 1 is a cross-sectional view corresponding to FIG. 1 for explanation, FIG. 4 is a local cross-sectional view corresponding to FIG. 1 for explaining a modification of the position holding member in the locking device shown in FIG. 1, and FIG. FIG. 6 is an external view showing an example of the shelf, FIG. 6 is a side sectional view showing an example of the lock mechanism of the shelf shown in FIG. 5, and FIG. 7 is a view in the direction of the line VII-VII in FIG. Sectional drawing, FIG. 8 is a side sectional view showing another example of the lock mechanism of the shelf shown in FIG. 5, and FIG. 9 is a sectional view taken along the line IX-IX in FIG. is there. 1 ... movable shelf, 5 ... rotation operation handle, 9 ... operation knob, 10 ... side plate, 11 ... pipe axis, 12 ... lock operation member, 12A ... arm part, 13 ... as a braking member Brake wheel, 20
…… Position holding member, 20A …… Case, 20A1, 20A2 …… Case side, 20A3 …… Opening, 20B …… Holding piece.

Claims (1)

[Scope of utility model registration request] 1. A tube shaft rotatably supported on a side portion of a movable shelf, a rotary operation handle integrally provided on the tube shaft and capable of being manually rotated, and an integrally provided on the tube shaft. And a drive wheel for transmitting the rotational drive force of the rotary operation handle to the traveling wheels to drive the movable shelf, and a pipe for axially penetrating the pipe shaft. It can reciprocate in the tube axis direction by manual operation at the center of rotation of the handle, and the portion protruding from the rear end of the tube axis is once bent in a direction orthogonal to the tube axis to form an arm section. Further, the tip end portion is folded back in the pipe axis direction, and the tip end portion is inserted into the immovable portion so as to be non-rotatable, and the lock operation member is provided integrally with the pipe shaft. Above the tube axis of the lock operation member The lock operation member is engaged and disengaged by the reciprocal movement in the opposite direction to restrain the drive wheel from rotating, and a braking member for releasing this restraint and a reciprocating path of the arm portion of the lock operation member are provided. At the locked position where the braking member and the lock operating member are engaged with each other, the distal end elastically engages a part of the peripheral surface of the arm portion, and the braking member and the lock are provided. A movement including a position holding member in which the distal end elastically engages with a part of a peripheral surface opposite to the part in the unlocked position where the engagement with the operation member is released. Shelf locking device.