JPH0545243Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a clutch device for a manually operated movable shelf.

[Conventional technology]

As shown in Utility Model Publication No. 1-30099, for example, a clutch device for a manual movable shelf has a clutch sprocket fixed to a drive shaft, and a clutch pendulum suspended from each end of an arm integrated with the drive shaft. By biting the pin with the clutch pendulum into the teeth of the clutch sprocket, the driving force of the handle is transmitted to the drive sprocket, and when you release your hand from the handle, the handle rotates under its own weight, hanging down. At the same time, the pin of the clutch pendulum will come off the teeth of the clutch sprocket.

[The problem that the idea aims to solve]

In the above clutch device, when the handle is released after the shelf has been moved, the handle rotates freely and returns to the hanging state, but at this time, the pins of the clutch pendulum hit the teeth of the clutch sprocket one after another, causing a clicking sound. There is a problem that noise is generated due to contact between metals.

Therefore, the technical object of this invention is to provide a clutch device that does not generate such noise.

[Means to solve the problem]

In order to solve the above problem, this device engages when a driving force is applied to the handle grip to transmit the driving force, and when the handle grip is released, the handle droops under its own weight and disengages. In a clutch device for an old manual movable shelf, a clutch sprocket is fixed to the drive shaft, and a handle facing the sprocket and a clutch pendulum facing the other side of the handle are fitted so that they can rotate freely. , the handle is provided with a V-shaped groove, and the clutch pendulum is provided with an elongated hole, the groove of the V-shaped groove is on the outside of the clutch sprocket, and both ends thereof are in the grooves of the teeth of the clutch sprocket. The elongated hole has a length extending from the trough of the V-shaped groove to the trough of the teeth of the sprocket, and the elongated hole has a length that extends from the valley of the V-shaped groove to the valley of the teeth of the sprocket, and each of the slots has a length that extends from the valley of the V-shaped groove to the valley of the teeth of the sprocket, respectively. It has a structure in which it is fitted into a V-shaped groove and a long hole so that it can move freely.

[Effect]

When the handle is in the hanging position, the clutch pin fits into the valley of the V-shaped groove and the lower end of the slot, disengages from the teeth of the clutch sprocket, and the clutch is in the disengaged position. When the handle is rotated to either the right or left, the clutch pin approaches the teeth of the clutch sprocket along one inclined groove of the V-shaped groove and the long hole of the clutch pendulum, and at a predetermined rotation angle, the clutch pin approaches the sprocket. It bites into the teeth and clutches.

The handle and clutch pendulum rotate together to rotate the drive sprocket through the clutch sprocket and drive shaft.

If you let go of the handle when it is in a high position,
The handle does not return to its hanging state due to its own weight, and at this time the clutch pin disengages from the teeth of the clutch sprocket along the V-shaped groove and the long hole of the clutch pendulum, and the clutch is disengaged. Since the clutch pin moves to the valley of the V-shaped groove, it returns to its original position without hitting the teeth of the sprocket.

〔Example〕

FIG. 1 shows the appearance of the drive unit 2 in the movable shelf 1. As shown in FIG. The drive unit 2 is composed of a clutch device 3, a drive sprocket 4, a chain 5, a tensioner 6, a driven sprocket 7, a driven shaft 24, an axle 25, a stopper 9, etc.

The clutch device 3 fixes a clutch sprocket 11 to a drive shaft 10 as shown in FIGS. 2 and 3, and also has a handle 12 facing the sprocket 11 so as to be freely rotatable on the drive shaft 10. Furthermore, a clutch pendulum 14 is fitted onto the other side of the handle 12 via a spacer 13 so as to be freely rotatable. handle 12
is covered with a cover 15, and a handle grip 16 is attached to the lower end.

A V-shaped groove 17 is formed in the handle 12. V
The valley portion of the shaped groove 17 is located on the outside of the teeth of the sprocket 11, but the inclined grooves on both sides gradually approach the sprocket 11 side and reach the valley portion of the tooth at a distance of two tooth pitches. have

Further, a long hole 18 is formed in the clutch pendulum 14. The long axis of this long hole 18 is the sprocket 1.
1, its lower end matches the trough of the V-shaped groove 17, and its upper end has a length that matches the trough of the teeth of the sprocket 11.

In addition, the above-mentioned handle 12 and clutch pendulum 14
A clutch pin 19 is interposed with a sufficient margin between the two. The clutch pin 19 has pins protruding from both sides of the collar, and the pins on both sides are freely inserted into the V-shaped groove 17 and the elongated hole 18, respectively.

The stopper 9 has holes 21 of a constant pitch provided along the periphery of a disk 20 fixed to the drive shaft 10, and a stopper pin 22 that fits into the holes 21 is provided on the stopper handle 23.

Further, FIG. 4 is a plan view of the movable shelf 1, showing how driving force is transmitted from the driven shaft 24 to the axle 25.

In the above-mentioned movable shelf 1, in the normal state, the handle 12 and the clutch pendulum 14 are in a hanging state, and the clutch pin 19 is present at a portion where the valley of the V-shaped groove 17 and the lower end of the elongated hole 18 coincide,
The clutch is in a severed state. Therefore, in this state, the movable shelf 1 is in a state where it can be freely moved.
However, when the stopper pin 22 is inserted into the hole 21 of the disc 20 by operating the stopper handle 23, it is locked and the movable shelf 1 does not move.

When the handle 12 is rotated clockwise or counterclockwise with the stopper 9 unlocked, as the rotation angle increases, the clutch pin 19 moves into one inclined groove of the V-shaped groove 17 and inside the elongated hole 18 toward its upper end. At the same time, the clutch pendulum 14 touches the clutch pin 19.
It rotates as it is pulled by.

As the rotation angle of the handle 12 increases, the clutch pin 19 is guided by the slope of the V-shaped groove 17 and the elongated hole 18, as shown in FIG.
The handle 12 and clutch sprocket 11 are connected via the pin 19, and the clutch is in the engaged state (Fig. 7 a to c).
reference).

When the clutch is engaged, the drive shaft 10, drive sprocket 4, chain 5, driven shaft 24 and axle 25
The wheel 8 is rotated through the steps.

When the hand is released from the handle grip 16 at a predetermined position, the handle 12 rotates under its own weight and falls to its original hanging state. At this time, when the handle 12 is rotated by a certain angle from the upright position, the clutch pin 19 is guided by the slope of the V-shaped groove 17 and the long hole 18, and moves toward the outer end of the long hole 18, as shown in FIG.
The clutch pin 19 separates from the tooth (Fig. 8 a-c)
reference). Therefore, when the handlebar 12 falls down, the clutch pin 19 is attached to the sprocket 1.
It never hits the 1st tooth.

When the clutch pin 19 comes out from between the teeth, the clutch is disengaged and the drive shaft 10 becomes free.

[Effect of idea]

As described above, this invention allows the clutch pin to be placed in a free state between the V-shaped groove of the handle and the elongated hole of the clutch pendulum. It can be moved away from the sprocket teeth, thereby eliminating noise caused by metal contact.

[Brief explanation of the drawing]

Fig. 1 is a front view of the embodiment, Fig. 2 is a partially enlarged front view of the same, Fig. 3 is a vertical sectional side view of the same, Fig. 4 is a plan view of the same, and Figs. 5 and 6 are operation. A front view of the state, FIGS. 7a to 7c are explanatory views of the action when the clutch is engaged, and FIGS. 8a to c are explanatory views of the action when the clutch is disengaged. DESCRIPTION OF SYMBOLS 1...Moving shelf, 2...Drive unit, 3...Clutch device, 4...Drive sprocket, 5...Chain, 6...Tensioner, 7...Driven sprocket, 8...Wheel, 9...Stopper , 10
... Drive shaft, 11 ... Clutch sprocket, 1
2... Handle, 13... Spacer, 14... Clutch pendulum, 15... Cover, 16... Handle grip, 17... V-shaped groove, 18... Long hole, 19
...clutch pin, 20...disc, 21...hole,
22... Stopper pin, 23... Stopper handle, 24... Driven shaft, 25... Axle.

Claims (1)

[Scope of utility model registration request] In a clutch device for a manual movable shelf, which engages when a driving force is applied to the handle grip and transmits the driving force, and when the handle grip is released, the handle droops under its own weight and disengages. A clutch sprocket is fixed to the drive shaft, and a handle facing the sprocket and a clutch pendulum facing the other side of the handle are fitted so that they can rotate freely.
A V-shaped groove is provided in the above-mentioned handle, and a long hole is provided in the clutch pendulum. The elongated hole has a length that reaches from the valley of the V-shaped groove to the valley of the tooth of the sprocket, and the long hole has a length that reaches from the valley of the V-shaped groove to the valley of the tooth of the sprocket, and both ends of the clutch pin interposed between the handle and the clutch pendulum are connected to the V-shaped groove. A clutch device for a manual movable shelf characterized by being fitted into a shaped groove and a slot so that it can be moved freely.