JPS60178196A - Traction winding device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a traction hoisting device.

Conventional traction hoisting devices are equipped with an idle mechanism that disengages the pinion and intermediate driven gear when no load is applied so that the chain can be quickly adjusted to a predetermined length. If the idling mechanism is operated incorrectly while the operating handle of the traction hoisting device is being swung to hoist and rewind, the load sheave will be able to rotate freely and there is a danger that the lifted object may fall. there were. Furthermore, depending on the situation at the work site, a falling rock may unexpectedly hit the switching lever of the operating handle, causing it to return to the neutral position while the worker is operating the handle with force. There was also an accident where he was caught unexpectedly and hit his knee, resulting in an injury.

An object of the present invention is to provide a towing and hoisting device having a safety mechanism that prevents the occurrence of such dangerous accidents.

The present invention will be explained based on the illustrated embodiment.

In Figures 1 and 2, I is the operating handle;
i, t housing, 4 is the base of handle 1 (=J
A chain: 3G is mounted on the 7-l sorb in the housing 2, and a knock is attached to one end. The switching lever 26 is raised several times in a protruding manner, and a safety lever 37 is also provided in a protruding shape near it (= J number J. Specifically, in FIG. 2, the switching lever 26 is in the unwinding position D, and when the handle 1 is swung, the chain 36 is rewound.

However, ζ, °ζ, 3 in FIG. 3 is a 1'1-dosorb, and the chain 36 is suspended, and the load sorb 3 is moved through the drive shaft 4 and the +Wi wheel mechanism 11 by the swinging motion of the handle l. Rotate and drive. For more details, see Handle 1
The swinging motion is transmitted and converted into the rotational motion of the drive wheel 6 via the ratchet mechanism 5. The driving wheel 6 is screwed onto a driven wheel 7, and as the driving wheel 6 rotates, the driving wheel 6 moves relative to the driven wheel 7 in its axial direction. At the second position U, the driving wheel 6 rotates to the left and is connected to the driven wheel 7 via the brake linings 8, 8 and the windmill 9, and the rotational force is transmitted to the driven wheel 7. do. Further, at the rewinding position D, the driving wheel 6 does not rotate in the right direction B, but the driven wheel 7 also rotates following the driving wheel 6 due to the unwinding load of one hexagram on the load sorb 3. The driven wheel 7 is slidably spline-fitted to the drive shaft 4, and is driven by the driven wheel 7! Il]4 can move relative to each other in its axial direction, and rotate integrally with it.

A pinion 10 is fixed to the tip of the drive shaft 4, and the pinion 10 is interlocked and connected to a gear mechanism 11 connected to the load sheave 3 (not shown) so as to be able to engage and disengage. When the pinion 10 and the float mechanism 11 are in mesh, the rotational movement of the drive shaft 4 is transmitted to the load sheave 3 via the gear mechanism 11, and the load sheave 3 drives the winding U or the unwinding D. becomes possible. Further, when the pinion 10 and the gear mechanism 11 are in a disengaged state, the rotational movement of the drive shaft 4 is transmitted to the load sheave 3, and the load sheave 3 is in a reverse rotation state. That is, I'), the drive shaft 4 and the pinion lO can move freely in the shaft horn direction as a unit, and when they move in the direction of arrow B, the pinion 10 is disengaged from the gear mechanism 11, and +: + - 1: The sheave 3 is in a state of separation Φr, and the spring 3) is connected to this pinion IO.
and drive 11id+4 in the direction of the arrow, i.e. 111:”
In the direction of the 4 conjunction, a bullet is fired (one group is fired).

The ratchet mechanism 5, as shown in FIGS. 3, 4, and 5, consists of a gear 17 and a pair of left and right pawls 18 and 19.

The tooth 17 is loosely fitted onto the driven wheel 7 and is fixed to the driving wheel 6 by a plurality of bolts 16 .

In addition, the claw pieces 1B and 19 are attached to the handle 1 with a claw support shaft 20.2.
The left claw pieces 18 are arranged opposite to each other so as to be swingable through the
is for winding, which engages the gear 7 as shown by the solid line in Figure 5 during winding (), and the right claw piece 19 engages the gear 17, as shown by the phantom line in Figure 5, at the time of rewinding. It is for use.

Both pawl pieces 18, 19 are always resiliently biased in the direction of detachment from the gear 17 by 6 inches 422, 23 respectively. The engagement and disengagement between these claw pieces 18 and 19 and the gear 17 is controlled by a cam 24 fixed to a cam shaft 25 that is completely separate from the claw support shafts 20 and 21.

That is, as shown in FIG. 4, when the cam 24 is in the neutral N position, both claw pieces 18 and 19 are both resilient members 22 and 23.
The gear 17 is in a disengaged state due to the elastic force of the gear 17, and even if the handle 1 is swung, the gear 17 does not rotate in either the winding direction F or the unwinding direction G.

Further, as shown by the solid line in FIG. 5, when the cam 24 is in the winding U position, the winding claw piece 18 is in an engaged state by the cam 24 against the resilient force of the resilient member 22. On the other hand, the rewinding claw piece 19 is in a detached state due to the elastic force of the elastic member 23. When the handle 1 is rocked, only the rocking force of the handle 1 in the hoisting direction F is transmitted to the gear 17 via the hoisting pawl 18, so that the gear 17 and the drive wheel 6 are The load sheave 3 rotates in the hoisting direction F, thereby driving the load sheave 3 to hoist in the manner described above.

On the other hand, as shown by the imaginary line in FIG. 5, when the cam 24 is at the rewinding position D, the winding claw piece 18 is in the detached state due to the elastic force of the springing part 22, and the winding claw piece 18 19 is cam 24
Due to this, he is forced into a state of restraint. Therefore, when the hand row is swung, the oscillating force of the handle 1 in the rewinding direction G is transmitted to the gear I7 via the rewinding pawl 19.
+: r −1; Sheave 3 rotates in the opposite direction.

The camshaft 25 protrudes to the outside of the handle l, and the switching lever 26 is fixed to the protrusion of the camshaft 25, and the switching lever 26 can be moved between FIG. 1, FIG. 2, and an intermediate position therebetween. By changing the position, the cam 24 and the pawls J-'i' 18 and 19 are controlled to rotate to the winding, unwinding, and neutral positions as shown in FIGS. 4 and 5. Note that 27 is a positioning mechanism for the cam 24, and the mechanism 27 is composed of a protrusion 28 and a resilient member 29.

Reference numeral 13 denotes a pawl piece pivotably mounted on the housing 2, and the pawl piece 13 engages with a heavy weight 9 interposed between the driving wheel 6 and the driven wheel 7 to hoist the mold wheel 9. Prevents rotation in the direction +L
L, driven wheel 7 that descends during hoisting, and finally l: J -IX
When the sheave 3 is prevented from reversing, the rotational force of the driven wheel 7 is prevented from acting directly on the driving wheel 6 during rewinding.

12 is an idling mechanism for operating the load sheave 3 into an idling state, and the idling mechanism 12 consists of a cam member 14 fixed to the rear end of the driven wheel 7 and 1! & Consists of an operating wheel 15 which is rotatably fitted onto the end portion and engages with the cam and surface of the cam portion +Jf14.

Therefore, when the operating wheel 15 is rotated in one direction from the meshed state of the pinion 10 and the gear mechanism 11, the operating wheel 15
is moved in the right direction B by the action of the cam surface of the cam member 14 as shown in the imaginary line in FIG. In this way, the load sheave 3 becomes in an idle rotation state with respect to the drive shaft 4. Furthermore, if the operating wheel 15 is operated in the opposite direction to the above, the load sheave 3 is moved to the left direction A by the action of the spring 38. , the pinion 10 and the gear mechanism 11 are brought into mesh again, and the idle rotation state of the load sheave 3 is released.In other words, the load sheave 3 and the drive shaft 4 are interlocked.

However, as shown in Figures 6 to 9 of C1, the drive 4i+
A locking portion 30 is indirectly provided on b 4, and in the illustrated example, an outer flange portion 31 is formed on the operating wheel 15 that is mounted on the drive shaft 4 to prevent relative movement in the axial direction. Then, the outer surface of the collar (flange part:) 1 is used as a locking part 30.Then, the outer collar can be freely engaged and detached from the safety harness (7 collar + lx part:) 0. The safety lever shaft 32 is protruded from the handle l near the switching lever 2 (1), and the safety lever shaft 32 is fixed to protrude from the handle l, and the elastic part JA33 is interposed. A safety lever 37 is pivotably attached to this shaft 32, and is prevented from coming off with a nand 34 or the like.

More specifically, the safety lever 37 is bent into a 7-shape as shown in FIG. Correspondingly,
Movement of the operating wheel 15 and drive shaft 4 in the right direction B is prevented. Moreover, the safety lever 37 has a flat regulation part 39,
The regulating portion 39 corresponds to the outer surface of the handle 1 and the ilZ line, and is formed on the side facing the curved convex portion 44 of the switching lever 26-X1. Further, an upper contact portion 40 is provided in an upright manner at right angles to the flat plate-like restriction portion 39 so as to be easily operated by a person with a finger.

On the other hand, the switching lever 26 has a concave curved portion 41 on the left and right side edges,
41 and a flat plate-like regulating portion 42 parallel to the outer surface of the handle 1, and a knob portion 4 protruding from the plate-shaped regulating portion 41 (to be picked by a person with fingers).
3, and as is clear from FIG. 7, the flat regulating portion 39 of the safety lever 37 and the flat regulating portion 42 of the switching lever 26 are arranged on almost the same plane. When they swing, they come into contact with each other to restrict their movements.

That is, only when the switching lever 26 is in the neutral N position, the safety lever 37 swings from the imaginary line in FIG. The shapes of both flat plate-like regulating portions 39 and 42 are determined with this in mind. In other words, the shape is determined so that the curved convex portion 44 of the safety lever 37 can swing without colliding with the substantially arc-shaped concave curved portion 41 of the switching lever 26 at the neutral N position. By this rocking, the locking piece 35 of the safety lever 37 is completely locked into the locking portion 3 of the operating wheel 15.
The operating wheel 15 is free to move in the axial direction away from the outer surface. On the other hand, if the switching lever 26 is switched to the lower U position as shown in FIG. 11 to approach and move the safety lever 37 to arrow P.
Even if it is pushed in the direction with a finger, it swings slightly as shown by the imaginary line in the figure, and the engagement state between the locking piece 35 and the locking portion 30 is maintained. Also, as shown in FIG.
When the switching lever 26 is switched to VT, the curved convex portion 44 of the safety lever 37 approaches the protrusion 46 near the tip of the regulating portion 42 of the switching lever 26 with a small gap, and the safety lever 37
Even if you press with your finger in the direction of arrow P, the 4ji4
Because of the movement, the locking piece 35 still corresponds to the outer surface of the locking portion 30, and the engaged state is maintained.

In this manner, the operating wheel weight 5 can be pulled out in the direction of arrow B while pressing the safety lever 37 with a finger in the direction of arrow P only when the switching lever 26 is in the neutral N position as shown in FIG. 1O. The resilient member 33 is always illuminated with a strong light (; Thus, the axial width M of the outer flange portion 31 is set to be larger than the amount of movement of the drive shaft 4 and the operating wheel 15 in the directions of arrows A and B, so that the axial width M of the outer flange portion 31 is set to be larger than the amount of movement of the drive shaft 4 and the operating wheel 15 in the directions of arrows A and B, so that the axial width M of the outer flange portion 31 is pulled out in the direction of arrow B. In this case, the locking piece 35 of the safety lever 370 rides on the outer flange 31 of the operating wheel 15 having a large width M.
It maintains a swinging posture close to the solid line in FIG. 10, and therefore, in this state, it is prevented from holding the switching lever 26 by hand and forcibly swinging it from the neutral N position to the winding tJ position and the rewinding D position. There is. 12+1 When the locking piece 35 comes into contact with and rides on a protrusion 47 attached to the drive shaft 4, such as the outer peripheral surface of the outer flange 31, in an idle rotation state, the switching lever 2
Assuming that 6 cannot be switched to the winding U position or the winding D position,
This effectively prevents a gear breakage accident due to large rotational torque acting when the pinion 10 and gear mechanism 11 are in a half-engaged state.

In the illustrated embodiment, the locking portion 30 is provided on the operating wheel 15, but it is also preferable to attach another member to the drive shaft 4 and form the locking portion 30 thereon. It is also possible to form the locking portion 30 directly on the shaft 4 itself. Further, the shapes of the safety lever 37 and the switching lever 26 are freely deformable, and can be determined completely freely, such as by reversing the concave and convex portions, as long as they have a shape that restricts mutual rocking as described above. In addition, the switching lever 26 can be mounted on the pawl support shaft 20, 21, and the pawl piece 1B.

19 and the claw support shaft 20.21 can also be used as singular people.

In addition, the protruding portion 47 may be provided on the drive shaft 4 in close contact with the operating wheel 1.
It is also preferable to provide parts other than 5.

As described in detail, the operation handle l is provided with a switching lever 26 protruding from the operating handle l for switching between the winding-L-hanging U, rewinding 1] and neutral N positions, and the drive shaft 4 A locking portion 3o is provided directly or indirectly on the locking portion 3o.
A safety lever 37, which can be freely engaged and detached from the N position, is provided protruding from the handle l, and the switching lever 26 and the safety lever 37 are disposed close to each other, so that the switching lever 26 is in the neutral N position. The switching lever 26 and the safety lever 37 are constructed in a shape that allows them to come into contact with and separate from each other, so that the safety lever 37 can swing in the direction of disengaging from and disengaging from the locking portion 30. The safety lever 37 is placed in the negative position 11 by the generating member 33:
It explodes in the direction of locking the part 3o (・1 group -J and -
When the drive shaft 4 is moved in its axial direction and pulled out in the direction to disengage the 1:1-dosozo 3 drive pinion 01, the safety lever 37 comes into contact with the protrusion 47 attached to the drive shaft 4, Since the towing and hoisting device is configured to prevent the switching lever 26 from swinging from the neutral N position to the hoisting U or rewinding D position, it is possible to effectively achieve the intended purpose. Unless the pinion 1o of the drive shaft 4 is disengaged and turned into an idle state unless you swing it with your fingers while being aware of the 37, it is possible to prevent the accident of the lifted object from falling unexpectedly. At the rewinding position D, the safety lever 37 cannot be disengaged from the locking portion 3o, thereby further improving safety.

Moreover, when the pinion 1o is pulled out in the axial direction and the pinion 10 is in a half-engaged state, the switching lever 26 is wound up -U
Since the structure does not allow switching to the D position or the unwinding position, it is possible to prevent to a limited extent an accident in which the surface pressure of the pinion 10 on the gear mechanism 11 is extremely increased and the gear mechanism 11 is damaged. Furthermore, depending on the situation at the work site, a falling rock or the like may collide with the switching lever 26 and cause the hoist U to return to the neutral N position, or when the handle 1 is rocked in a narrow space, the switching lever 26 may become a protruding object.
If the handle 6 unexpectedly collides and returns from the hoist U position to the neutral N position, the worker may be caught unawares and fall from a height while swinging the handle l with all his might. However, the safety lever 37 prevents objects such as falling rocks from colliding with the switching lever 26, or preventing protruding objects from colliding with the switching lever 26.
This has the great effect of preventing collisions with vehicle 6 and effectively preventing the above-mentioned serious accidents.

[Brief explanation of drawings]

FIG. 1 is a front view of an embodiment of the present invention in a rolled up state;
Fig. 2 is a front view of the unwinding state, Fig. 3 is an enlarged side view partially cut away, Fig. 4 is a front view of main parts in the neutral position, and Fig. 5
The figure is a front view of the same in the winding or unwinding position, Figure 6 is a cross-sectional side view of the main part, Figure 7 is a simplified explanatory diagram explaining the positional relationship between the safety lever and the switching lever, and Figure 8 is the main part in the winding state. FIG. 9 is a front view of the main part in the rewound state, and FIG. 1O is a front view of the main part in the neutral state. U...winding up, D...winding back), N...
Neutral, l...handle, 3...rotosorb, 4.
... Drive shaft, 10... Binion, 26... Switching lever, 30... Locking part, 33... Resilient member, 37...
-Safety lever, 47... protrusion. Patent Applicant: Hetch Co., Ltd. Figure 1, Figure 2, Figure 4, Figure 5, Figure 81: Figure 9

Claims (1)

[Claims] 1.1 The entertainment handle 1 is provided with a protruding switching collar 26 for switching between the winding U, rewinding D, and neutral N positions, and the drive shaft 4 is further provided with a locking portion directly or indirectly. 30
and a safety lever 3 that can be freely engaged and detached from the locking part 30.
7 is provided in a protruding manner on the handle 1, and the switching lever 26 and the safety lever 37 are disposed close to each other, so that the locking portion 3 of the safety lever 37 is engaged only when the switching lever 26 is in the neutral N position. The J-bar 26 and the safety lever 37 are configured to be able to swing in the direction of disengaging and disengaging from the engagement of 〇-1, and the safety lever 37 is constructed in a shape that allows them to come into contact with and separate from each other. 37 is locked in the locking IL, ij++30 (one force is applied), and the drive shaft 4 is moved in the axial direction and pulled out in the direction to disengage the rotary sheave 3 drive pinion IO, the above-mentioned safety is achieved. The lever 37 is configured to come into contact with the protrusion 47 of the drive shaft 4 (=J) to prevent the switching lever 26 from swinging from the neutral N position to the winding U or rewinding D position. A traction hoisting device featuring: