JP2603594B2 - Manual hoisting / traction device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manual hoisting / traction device,
More specifically, the present invention relates to a manual hoisting / traction device mainly provided with a manual operating member and a transmission mechanism having a mechanical brake for transmitting a driving operation of the operating member to a drive shaft, and mainly used for belt loading.

[0002]

2. Description of the Related Art Conventionally, a belt buckling machine having a mechanical brake has been proposed as shown in Japanese Utility Model Laid-Open No. 2-150166, and a lever-type hoisting and traction device. Also, in a manual hoist having a handwheel, a transmission mechanism having a mechanical brake is used between a drive member and a manual operation member such as an operation lever or a handwheel.

[0003] Therefore, when the belt is pulled by the manual operation member to be driven to tighten the load, or the load chain for locking the load is pulled or rolled up, the loaded state or the load is pulled or rolled up. The state is maintained by the action of the mechanical brake, and these operations are performed by the action of the mechanical brake when releasing the load, releasing the traction of the load, or unloading the load. It can be done gradually.

[0004]

However, even if a mechanical brake is provided as described above, if vibration is applied while the cargo is being fastened, for example, a load loaded on a truck bed of a lorry can be removed. When vibration is applied from the automobile in the state of being packed, or when sand or rainwater is present between a lining plate constituting a mechanical brake and a reverse rotation preventing gear, a driven member or a driving member facing the lining plate. When the mechanical brake loosens carelessly, such as when the mechanical brake enters, or when the claw axis of the reverse rotation preventing claw that constitutes the mechanical brake is deformed or the frame is deformed, the load is tightened or the load is pulled. There was a risk that the condition would loosen or the loaded luggage would slip down.

[0005] It is an object of the present invention to provide a safety device that does not loosen the tightly packed state or the towed state of the load, or prevent the rolled-up load from slipping even if the mechanical brake is loosened. It is intended to provide a high manual hoisting / traction device.

[0006]

According to the first aspect of the present invention,
The apparatus body 1, a drive shaft 6 rotatably supported by the apparatus body 1, a manual operation member for driving the drive shaft 6, and a mechanical brake for transmitting the drive operation of the operation member to the drive shaft 6. In the manual hoisting and traction device provided with a transmission mechanism 12 having a lock gear 11, a lock gear 40 is provided on the drive shaft 6 so as to be relatively non-rotatable with the drive shaft 6. A lock claw 42 is provided to engage with the lock shaft 40 to prevent the drive shaft 6 from rotating on the rewind side.

Further, according to the present invention, a driving member 58 screwed to the driving shaft 6 and interlocking with an operating member, a driven disk 56 coupled to the driving shaft 6, and the driving member
Between the driven disk 58 and the driven disk 56 ,
The driven disk 56 in the mechanical brake 51 constituted by the ratchet wheel 57 with which the
The lock gear 40 is provided on the outer peripheral portion of the lock member, and the lock claw 42 is arranged in parallel with the reverse rotation prevention claw 59 .

According to a fourth aspect of the present invention, the operating lever 10 is formed by a part of arms 10a and 10b and a continuous grip 10c which connects the arms 10a and 10b. Mechanical brake 1 between one of the arm portions 10a and 10b on one side in the axial direction of
1 and a lock body 41 having a lock gear 40 and a second drive member 44 interlocking with the operation lever 10 are provided on the other side in the axial direction of the drive shaft 6 so as to be relatively non-rotatable. A lock claw 41 that engages with the lock gear 40 is provided on a side plate of the apparatus main body 1 located on the other axial side of the drive shaft 6.

According to a fifth aspect of the present invention, the lock body 41 and the second driving member 44 are provided integrally. Further, a sixth aspect of the present invention provides the operating lever 10 with a pair of arms. Parts 10a, 10b and these arm parts 10a, 1
0b is formed by a grip portion 10c for connecting the drive shaft 6 to both sides in the axial direction of the drive shaft 6 and the arm portions 10a and 10c.
b, there are provided transmission mechanisms 12, 52 having mechanical brakes 11, 51, respectively.
52, the lock gear 40 is provided on the outer peripheral portion of the driven disk 56 in at least one of the transmission mechanisms.

[0010]

According to the first aspect of the present invention, the drive shaft is provided with the lock gear which is coupled to the drive shaft so as to be unable to rotate relative to the drive shaft, and the apparatus main body is provided with the lock claw which is engaged with the lock gear. Therefore, even if the mechanical brake 11 is inadvertently loosened, the drive shaft 6 can be locked by the engagement of the lock claw 42 with the lock gear 40. Loosen,
This prevents the rolled-up luggage from slipping.

Further, according to the second aspect of the present invention, a lock gear 40 is provided on an outer peripheral portion of the driven disk 56 constituting the mechanical brake 51 , and the lock gear 40 is provided.
Since the lock pawls 42 engaging with the lock gears are arranged in parallel with the reverse rotation preventing pawls 59, it is not necessary to provide a lock body having a lock gear, and the components constituting the mechanical brake 51 can be used. The drive shaft 6 can be locked with a small increase in the number of points.

According to the third aspect of the present invention, the belt can be wound, and a manual winding having a drive shaft 6 serving as a belt winding shaft and an operation lever 10 for driving the drive shaft 6 is provided. In the traction device, on one axial side of the drive shaft 6,
The transmission mechanism 12 having the mechanical brake 11 is
Further, a lock body 41 having a lock gear 40 is provided on the other side, and the lock claw 42 is provided on the side plate 1b located on the other side of the drive shaft 6, so that when the load is fastened by the drive rotation of the drive shaft 6, The tightening state includes a braking action by a mechanical brake 11 provided on one side of the drive shaft 6 in the axial direction,
The locking action of the lock claw 42 provided on the other side can be maintained by the engagement with the lock gear 40, so that the tightened state can be effectively maintained and the mechanical brake 1 can be maintained.
Even if 1 is loosened, it is possible to effectively prevent the loosened state of the load and the collapse of the load.

According to the fourth aspect of the present invention, the operating lever 10 is provided with a pair of arm portions 10a and 10b and a grip portion 1.
0c, and a lock body 41 and a second drive member 44 interlocked with the operation lever 10 are provided on the other axial side of the drive shaft 6, so that the grip portion 10c is used to tighten the load. When driving the operation lever 10 by grasping it,
This operating drive force can be transmitted to the drive shaft 6 from both axial sides of the drive shaft 6, so that the arm portions 10a, 10a of the operation lever 10 can be operated even when the load of loading is large.
0b can be prevented from being deformed, and the rigidity of the operation lever 10 can be reduced as compared with a structure in which the driving force is transmitted from one of the arms 10a and 10b. is there.

According to the fifth aspect of the present invention, since the lock body 41 and the drive member 44 are integrated, the length of the drive shaft 6 can be shortened. In other words, the lateral width of the apparatus main body 1 is reduced. Since it is possible to reduce the size, it is possible to reduce the size while obtaining the operation according to the third aspect of the present invention.

Further, in the invention according to claim 6, the operation lever is provided.
10 is a pair of arm portions 10a and 10b and grip portion 10
c, and a mechanical brake 1 is provided between both sides of the drive shaft 6 in the axial direction and each of the arm portions 10a and 10b.
1 and 51, and the lock gear 40 is provided on at least one of the transmission mechanisms 12 and 52 on the outer periphery of the driven disk 56 of at least one of the transmission mechanisms. Can be transmitted to the drive shaft 6 from both axial sides of the drive shaft 6,
Therefore, even when the load of loading is large, the operation lever
10 can be prevented from being deformed, the stiffness of these arms 10a, 10b can be kept low, and the packing state can be reduced by the mechanical brakes 11, 51 of the two transmission mechanisms 12, 52. It can be held effectively by the braking action, and one mechanical brake 11
Or, even if 51 is relaxed, the packed state can be maintained by the other mechanical brake 51 or 11, and both mechanical brakes
Even if the keys 11 and 51 are loosened, the locked state by the locking action of the lock claw 42 engaged with the lock gear 40 can be maintained in the closed state, and the collapse of the load can be prevented, so that a safer device can be provided.

However, since the lock gear 40 is formed by using the driven disk 56 constituting a mechanical brake, the increase in the number of parts can be reduced and the drive shaft 6 can be locked.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The manual hoisting and traction device shown in FIGS. 1 to 3 is a belt squeezing machine, which has a pair of side plates 1a and 1b opposed to each other at a predetermined interval. 1b
And a frame-shaped apparatus main body 1 which is connected by a fixed rod 2 to be described later and a connecting shaft 4 into which a collar 4a serving also as a pivot shaft of the reverse prevention claw 3 is fitted. A drive shaft 6 serving as a belt take-up shaft for winding the first belt 5 is rotatably provided, and the first belt 5 is fixed to the drive shaft 6 by a fixing structure described later, while the other side of the main body 1 is provided. To
A winding body 9 of a belt length adjusting mechanism 8 for fixing the second belt 7 so that the length can be adjusted together with the fixing rod 2 is provided, and an operation lever 10 for driving the driving shaft 6 is supported on the driving shaft 6. A transmission mechanism 12 having a mechanical brake 11 is provided between the operation lever 10 and the drive shaft 6.

The drive shaft 6 is rotatably supported by the main body 1 and has both axial ends projecting outward from the side plates 1a and 1b of the main body 1 as shown in FIGS. The lever 10 is rotatably supported on its protruding shaft portion. One of the protruding shaft portions has a driven disk 13 constituting a mechanical brake 11 and a support portion 15 of a ratchet wheel 14 for braking and a gear on the outer periphery. Part 16
A screw shaft portion 17 for screwing the driving member 16 having a and a small-diameter screw shaft portion 19 for screwing the nut 18 are provided.

The operating lever 10 comprises a pair of arms 10a, 10b and a grip 10c for connecting the free ends of the arms 10a, 10b. The arm portion 10b of the lever 10 is rotatably supported on the protruding shaft portion to prevent the lever from being pulled out by a retaining ring 20, and the supporting portion 15 of the protruding shaft portion protruding from the side plate 1a has a ratchet for braking. The wheel 14 is rotatably supported, and the driving member 16 is screwed to the screw shaft portion 17.
The other arm portion 10a of the operation lever 10 is rotatably supported on the boss portion 16b, and the drive member 16 and the arm are connected via a washer 21 by screwing the nut 18 to the small-diameter screw shaft portion 19. The part 10a is prevented from falling out.

The space between the driven disk 13 and the ratchet wheel 14 and the ratchet wheel 14
Lining plates 22 and 23 between the
The one end of the connecting shaft 4 connected to the main body 1 is provided with the reverse rotation preventing claw 3 which is removably engaged with the ratchet wheel 14 to provide a spring 24. The ratchet wheel 1
4 and the operating lever 10 is provided with a feed pawl 2 which can be disengaged from the gear portion 16a of the driving member 16 as shown in FIG.
5a and a return claw 25b.
a transmission claw 25 having a neutral position holding portion 25c at an intermediate portion of b
Is swingably provided via the pivot shaft 26.

A push body 2 engaging with the transmission claw 25 is provided on one arm 10a of the operation lever 10.
7 and spring 28 and these pressing bodies 27 and spring 2
8 and a holding cylinder 29 for holding the transmission claw 25.
Of the claw 25a,
Position holding that holds the transmission claw 25 at three positions: a neutral position in which none of the gears 25b is engaged with the gear portion 16a, a forward rotation position in which the feed claw 25a is engaged, and a reverse rotation position in which the return claw 25b is engaged. A mechanism 30 is provided.

In the above configuration, the driven disk 13, the ratchet wheel 14, and the anti-reverse pawl 3
And a drive mechanism for forming a mechanical brake 11 by the drive member 16 and the lining plates 22 and 23, and transmitting the power by the swing operation of the operation lever 10 to the drive shaft 6 by the mechanical brake 11 and the transmission claw 25. The drive shaft 6 is moved in the winding direction of the first belt 5 by operating the operation lever 10 by engaging a feed claw 25a of the transmission claw 25 with the gear portion 16a. The operation lever 1 can be rotated forward and the load can be fastened, and the return lever 25b of the transmission claw 25 is engaged with the gear portion 16a.
With the operation 0, the drive shaft 6 is reversed in the rewinding direction of the first belt 5, and the unpacking can be performed.

In the above configuration, with the nut 18 tightened, the drive member 16 can be moved between the washer 21 and the drive member 16 by a predetermined amount in the axial direction. A gap is provided, and the mechanical brake 11 can be operated or released by the axial movement of the driving member 16 due to the gap.

In the first embodiment shown in FIGS. 1 to 3, in the belt loader constructed as described above, the side plate 1b and the operating lever 10 at the projecting shaft portion of the drive shaft 6 projecting from the side plate 1b. A lock body 41 having a lock gear 40 which is coupled to the drive shaft 6 so as to be relatively non-rotatable is provided between the first arm portion 10b and the connection portion which supports the reverse rotation preventing claw 3 on one axial side. On the other axial side of the shaft 4, the lock gear 4 is attached to a protruding shaft portion protruding from the side plate 1 b.
The lock pawl 42 is provided to engage with the lock shaft 0 to prevent the drive shaft 6 from rotating on the rewind side.

More specifically, the lock body 41 is non-rotatably connected to the projecting shaft portion of the drive shaft 6 by spline connection or keying. The lock claw 42 is connected to the connection shaft 4. Are mounted on the protruding shaft portion so as to be rotatable at an engagement position for engaging with the lock gear 40 and a disengagement position for disengaging from the lock gear 40.

That is, as shown in FIG. 4, the protruding shaft portion of the connecting shaft 4 is constituted by a large-diameter shaft portion 4b and a screw shaft portion 4c. The lock claw 42 is constituted by a claw portion 42a that engages with the lock gear 40, and an operation portion 42b that engages and disengages the claw portion 42a with the lock gear 40. Lock claw 42 and large diameter shaft 4b
A detent mechanism 43 including a ball 43a, a spring 43b, and two engagement portions 43c and 43d is provided between the lock claw 40 and the engagement position (solid line position in FIG. 5) and the disengagement position (FIG. 5). (Chain position).

Instead of the detent mechanism 43, a spring similar to the reverse rotation preventing claw 3 may be used to urge the claw portion 42a of the lock claw 42 to always engage with the lock gear 40.

With the above construction, when the load is tightened by operating the operation lever 10, the locked state is maintained by the operation of the mechanical brake 11, and the lock claw 42 is The drive shaft 6 can also be locked by engaging with the lock gear 40. Therefore, even if the mechanical-canary brake 11 is inadvertently loosened, the drive shaft 6 is locked by locking. The state does not loosen, and the problem that the load collapses can be eliminated.

When unpacking, the lock claw 42
Is released from the lock gear 40, the operation can be performed gradually under the operation of the mechanical brake 11, and a sudden unloading does not occur.

In the embodiment shown in FIGS. 1 to 3, the first belt 5 is fixed to the drive shaft 6, and the length of the second belt 7 can be adjusted by a belt length adjusting mechanism 8. The first belt 5
The structure for fixing to the drive shaft 6 and the belt length adjusting mechanism 8 will be described.

First, the fixing structure of the first belt 5 will be described. The intermediate shaft portion of the drive shaft 6 located between the side plates 1a and 1b is provided with a notch 31 as shown in FIGS. A pressing body 32 having a circular outer peripheral surface concentric with the drive shaft 6 is provided, and the pressing body 32 is fitted into the notch 31 so that the notch 31 can be fitted into the notch 31. As shown in FIG. 6, the first belt 5 is sandwiched between the notch 31 and the pressing body 32 by screwing a mounting bolt 34 into a screw hole 33 provided in the portion 31. 5 is fixed.

That is, the first belt 5 is provided at its free end side,
As shown in FIG. 1, for example, a hook 35 is provided to be hooked on an engaging portion provided on a truck bed, and insertion holes 36, 36 for the bolts 34 are provided on the base end side at predetermined intervals in the length direction.
The base end side is provided with the notch 31 as shown in FIG.
The pressing shaft 32 is fitted into the notch 31 in a state where the drive shafts 6 are wound up and the insertion holes 36 are aligned with each other, and the mounting bolts 3 are inserted into the screw holes 33 from the insertion holes 36.
4, the pressing body 32 is fixed to the drive shaft 6, and the first belt 5 is fixed to the drive shaft 6.

Next, the belt length adjusting mechanism 8 will be described.
The adjusting mechanism 8 includes the fixed rod 2 provided on the other side in the length direction of the main body 1, and a winding mechanism that is provided inside the fixed rod 2, that is, on the drive shaft side and winds the base end side of the second belt 7. It is composed of the body 9 and the winding compensating pin 39 .

That is, the second belt 7 is provided with a hook 37 on the distal end side, as in the first belt 5 as shown in FIG. The length can be adjusted by being wound and can be fixed at the adjustment position. In the embodiment shown in FIGS. 1 to 3, the winding body 9 is not rotatable and the body 1 is not rotatable. It is provided so as to be slidable in the longitudinal direction.

That is, the winding body 9 has a circular peripheral surface around which the second belt 7 is wound at an intermediate portion in the longitudinal direction, and the radial center of the peripheral surface with respect to the fixed rod 2 as shown in FIG. Is mounted so as to be located above the main body 1 in the width direction. At both ends in the length direction, a non-circular boss portion 9a having both sides cut in the radial direction is provided, and the side plates 1a and 1b are provided with An elongated sliding hole 38 for receiving the boss 9a is provided, and the winding body 9 is not rotatable with respect to the main body 1 and is slidably supported back and forth within the range of the sliding hole 38. You do it.

In the second belt 7, the load side 7b at the base end is introduced from below the fixed rod 2 and the winding body 9 as shown in FIG. Involvement,
After passing between the winding body 9 and the fixed rod 2, it is attached so as to be drawn out from between the fixed rod 2 and the winding compensating pin 39, and tension is applied to the load side 7 b of the second belt 7. When a force is applied, the winding body 9 slides in the direction of the fixed rod 2, that is, forward (to the left in FIG. 1), and this sliding intervenes between the winding body 9 and the fixed rod 2. Second belt 7
Is clamped and fixed between the winding body 9 and the fixed rod 2. In addition, the winding body 9 is manually slid in the direction away from the fixed rod 2, that is, to the right in FIG. In this state, the length of the second belt 7 on the load side can be lengthened or shortened by pulling the free end side 7a or the load side 7b provided with the hook 37 in this state. The wrapping body 9 can be slid by grasping and operating the boss 9a. As shown in FIGS. 2 and 3, the slidable body 9 can be slid on both sides (or one side) in the longitudinal direction. The operation can be easily performed by providing the operation unit 9b.

Next, the operation of the belt loader constructed as described above will be described. First, when using the first belt 5
The hook 35 of the second belt 7 is hooked on a hook portion of a bed of a truck loaded with loads, for example. In this case, the load side 7b of the second belt 7, that is, the side on which the hooks 37 are provided is pulled out to lengthen the entire length of the belt, and the hooks 37 are hooked on the hooks in a state of being hanged over the load. After hooking on the hook portion, the free end side 7a of the second belt 7 is pulled while the winding body 9 is manually slid backward, and the length of the load side 7b is adjusted to loosen. The belts 5 and 7 are tensioned to a predetermined tension. At this time, a load hardly acts on the load side 7b of the second belt 7 until a predetermined degree of tension is reached, so that the length adjustment work by pulling the free end side 7a can be easily performed.

After the tension is adjusted to the predetermined tension as described above, the sliding operation of the winding body 9 is released.
By this opening, the winding body 9 moves to the fixed rod 2 side, and the second belt 7 is fixed. After that,
The operating lever 10 is repeatedly reciprocated between a forward movement position shown by a solid line in FIG. 1 and a backward movement position located in a counterclockwise direction from the forward movement position, and the power by the operation lever 10 is driven from the transmission claw 25. The driving member 16 is transmitted to the member 16.
The ratchet wheel 14 and the driven disk 13 are integrated, the drive shaft 6 is rotated in the forward direction, the first belt 5 is wound around the drive shaft 6, and the length of the first belt 5 is adjusted. The packing is done.

That is, at the time of loading, the feed claw 25a of the transmission claw 25 is moved from the neutral position shown in FIG.
a, the driving member 16 is driven to rotate clockwise by the clockwise swing of the operating lever 10 in FIG. 1 by this engagement, and the driving member 16 is driven by the rotation by the rotation. The driving member 16 is integrated with the ratchet wheel 14 and the driven disk 13 by screwing in the direction of the disk 13, and the power transmitted to the driving member 16 is transmitted to the driving shaft 6 via the driven disk 13, and The first belt 5 is wound up by rotating the shaft 6 in the forward direction (clockwise direction in FIG. 1), and the first belt 5 is pulled by this winding to tighten the load.

When the packing is performed as described above, the base end of the first belt 5 is fixed to the winding shaft 6, and the length of the second belt 7 is adjusted by the belt length adjusting mechanism. After the belts 5 and 7 are given a desired tension in advance, the first belt 5 is wound up by the operation of the winding shaft 6 so as to fasten the load. The winding amount of the first belt 5 can be reduced, and
Since the base end of the belt 5 is fixed and the first belt 5 is wound in a single layer, an increase in the winding diameter can be reduced. That is, the increase in the winding diameter with respect to the winding amount can be reduced, and therefore, the winding of the first belt 5 by the drive shaft 6 can be sufficiently performed, and the packing can be reliably performed.

In order to release the tightened state as described above, the return claw 25b of the transmission claw 25 is engaged with the gear portion 16a, and the operating lever 10 is repeatedly reciprocated. It is done by. That is, the swinging of the operation lever 10 in the counterclockwise direction in FIG. 1 causes the driving member 16 to rotate in the counterclockwise direction, and the rotation causes the driving member 16 to retreat in the direction away from the driven disk 13. The drive member 16
And the ratchet wheel 14 and the driven disk 13 are unified. As a result, the drive shaft 6 rotates in the reverse direction by the amount of unscrewing of the drive member 16, and the first Pull out the belt 5, each belt 5,7
To relax. Therefore, the loading is released by repeating this operation, and the release of the loading is gradually performed in accordance with the operation of the lever 10 by the action of the mechanical brake 11. The tension is released instantaneously, preventing the collapse of the cargo. The reverse rotation preventing claw 3 is provided with an operation portion 3a on the back side. The engagement of the reverse rotation prevention claw 3 with the ratchet wheel 14 by the operation of the operation portion 3a is released, so that the mechanical brake 11 is released. The drive shaft 6 can be freely rotated irrespective of the operation, so that quick release of the load can be performed.

Further, at the time of unloading performed as described above, the first belt 5 is fixed to the drive shaft 6 even if the first belt 5 is rewound more than the winding amount of the first belt 5 by the drive shaft 6. Further, since the second belt 7 is fixed by the belt length adjusting mechanism 8 in a state where a load is applied, the adjustment side belt wound around the drive shaft as in the conventional example is moved from the slit of the drive shaft. It wo n’t break out, so
Even if the load collapses at that stage, further load collapse can be prevented, and the trouble of re-inserting the belt that has slipped out into the slit as in the conventional example can be eliminated.

In the embodiment described above, the lock body 41 is connected to the projecting shaft of the drive shaft 6. However, as in the second embodiment shown in FIG. 8, the projecting length of the projecting shaft is increased. And a second interlocked with the lock body 41 and the operation lever 10.
May be connected to each other so that they cannot rotate relative to each other.

In this case, like the first embodiment shown in FIGS. 1 to 5, the arm 10b of the lever 10 is provided on one arm portion 10b.
A transmission claw 45 capable of engaging and disengaging from the gear portion 44a of the second drive member 44 is provided via the pivot 26 so as to be swingable.

The transmission claw 45 is provided with a feed claw, a return claw, and a neutral position holding portion 45c similarly to the transmission claw 25 in the first embodiment described above, and the transmission claw 45 is provided on the arm portion 10b. 3 of the neutral position, forward rotation position and reverse rotation position
The position holding mechanism 46 for holding the position is provided.
This position holding mechanism 46 is formed by a pressing body 47, a spring 48, and a holding cylinder 49, as in the first embodiment. Therefore, according to the above configuration, the operation lever 10
Is operated to drive the drive shaft 6 in the winding direction, the driving force by the operation of the lever 10 is applied to both the transmission mechanism 12 and the second drive member 44 provided in one axial direction of the drive shaft 6. Is transmitted to the drive shaft 6, so that even if the load of loading is large, the loading can be performed without deforming the arms 10a and 10b. As a result,
This eliminates the need to increase the rigidity of the arms 10a and 10b.

When the lock body 41 and the second drive member 44 are provided on the projecting shaft portion of the drive shaft 6 as described above, they may be provided separately as shown in FIG. You can also. In the second embodiment shown in FIG. 8, the lock pawl 4 is provided between the lock pawl 42 and the side plate 1b.
2 is provided with a spring 64 for urging the lock gear 2 to always engage the lock gear 40. When the spring 64 is used, the detent mechanism 43 is unnecessary as in the first embodiment, and the structure is simplified accordingly. However, when the load is released, the lock claw 42 is disengaged against the spring 64 in the disengagement direction. Need to operate.

Further, the first and second embodiments described above
Although the description has been given of the belt loader in which the mechanical brake 11 is provided on one end side of the drive shaft 6 in the axial direction, the mechanical brake 11 may be provided on both ends of the drive shaft 6 in the axial direction as shown in FIG. .

In the third embodiment shown in FIG. 9, both ends of the drive shaft 6 in the axial direction are protruded outward from the side plates 1a and 1b, and one of the protruding shaft portions is the same as that of the first embodiment. A transmission mechanism 12 having a similar mechanical brake 11 is provided, and a transmission mechanism 52 having a mechanical brake 51 described below is provided on the other protruding shaft portion.

That is, as in the first embodiment, the projecting shaft portion at one axial end of the drive shaft 6 has a driven disk 13, a support portion 15, a screw shaft portion 17 having a right-hand thread, and a small-diameter screw shaft portion 19, as in the first embodiment.
, A rotatable brake ratchet wheel 14 is supported on the support portion 15, a driving member 16 is screwed on the screw shaft portion 17, and an arm of the operation lever 10 is mounted on a boss portion 16 b of the driving member 16. At one end in the axial direction of the connecting shaft 4 connected to the main body 1, a reverse rotation preventing claw 3 that engages with the ratchet wheel 14 to prevent the ratchet wheel 14 from rotating reversely while supporting the portion 10 a rotatably. At the same time, lining plates 22 and 23 are provided on both sides of the ratchet wheel 14 so that the arm portion 10 of the operation lever 10 is provided.
a, a transmission claw 25 is provided via the pivot 26 so as to be swingable, and a transmission mechanism 12 having the mechanical brake 11 is provided.
Is composed.

On the other hand, a projecting shaft portion at the other end in the axial direction of the drive shaft 6 has a spline portion 53 and a left-handed screw shaft portion 54 in which the screw directions of the screw shaft portion 17 are reversed, and a small-diameter screw shaft. A shaft 55 is provided, and the spline 53 is spline-coupled to a driven disk 56 having a cylindrical boss 56a on one side in the axial direction and having the lock gear 40 provided on the outer periphery.
A ratchet wheel 57 for brake is rotatably supported on a cylindrical boss portion 56a of the driven disk 56, and a third driving member 58 having a gear portion 58a on the screw shaft portion 54 is provided.
And the arm 10b of the operating lever 10 is rotatably supported on the boss 58b of the driving member 58, and the gear 57a of the ratchet wheel 57 is mounted on the other axial end of the connecting shaft 4. A reverse rotation preventing claw 59 for preventing the ratchet wheel 57 from rotating in the reverse direction and a lock claw 42 for engaging the lock gear 40 of the driven disk 56 and preventing the drive shaft 6 from rotating in the reverse direction. Lining plates 60 and 61 are provided on both sides of the ratchet wheel 57, and a transmission claw 62 is provided on the arm portion 10b of the operation lever 10 so as to be swingable via the pivot shaft 26. A transmission mechanism 52 having 51 is constituted.

The lock claw 42 is basically the same as that of the first embodiment shown in FIG. 3, and is provided so as to face the lock gear 40 provided on the driven disk 56.
The reverse rotation preventing claw 59 is also a mechanical brake in the transmission mechanism 12 provided in the first embodiment and at one axial end of the drive shaft 6.
The ratchet wheel 57 is basically the same as the reverse rotation preventing claw 3 of the key 11, and is provided outside the driven disk 56.
Is provided so as to face the gear portion 57a.

In the third embodiment, a detent mechanism similar to that of the first embodiment is provided between the lock claw 42 and the large-diameter shaft portion 4c of the connecting shaft 4, although not shown. The transmission claw 62 has a feed claw, a return claw, and a neutral position holding portion 62c, and can be held by the position holding mechanism 30 at three positions: a neutral position, a forward rotation position, and a reverse rotation position.

In FIG. 9, the same parts as those in FIGS. 1 to 3 are denoted by the same reference numerals.

According to the third embodiment, the grip 10
c, the power generated by swinging the operation lever 10 is transferred from the grip 10c to the arms 10a, 10a.
b can be transmitted to the mechanical brake 11 on one end of the winding shaft and the mechanical brake 11 on the other end, and the drive shaft 6 can be driven via these mechanical brakes 11;
The first belt 5 can be wound around the drive shaft 6. Therefore, at the time of loading as in the first embodiment of FIGS.
The drive shaft 6 can be locked, and mechanical brakes 11,
51 can be expected to maintain the tightness even if both of them are relaxed, but when the tightness is performed by the swinging operation of the operation lever 10, the power generated by the swinging operation of the operating lever 10 is applied to both sides of the drive shaft 6 in the axial direction. From the drive shaft 6. As a result, even when the load on the load is large, the load can be locked without deforming the arm portions 10a and 10b of the operation lever 10, and the rigidity of the operation lever 10 does not need to be particularly increased.

In the third embodiment, the driven disk 5
Since the lock gear 40 is provided in 6, the lock body having the lock gear does not need to be specially provided, and the number of parts can be reduced accordingly. Therefore, by applying this configuration to the embodiment shown in FIGS. 1 to 3 and 8, that is, the lock gear 40 is provided on the outer periphery of the driven disk 56, and the lock claw 42 is provided in parallel with the reverse rotation prevention claw 3. By doing so, the number of parts can be reduced.

In the third embodiment shown in FIG. 9, a large number of axially extending ridges or serrations (not shown) are formed on the outer peripheral surface between the side plates 1a and 1b of the winding body 9. A non-slip projection 9c is provided to prevent the second belt 7 from slipping relative to the winding body 9 when the second belt 7 is clamped and fixed, and the side plates 1a and 1b have Folded pieces 1c, 1 facing inward from each other on the bottom side
d is provided integrally. Further, in the third embodiment, the driven disk 56 is provided separately from the drive shaft 6 and is spline-coupled. This is in consideration of the assemblability of the drive shaft 6 to the side plates 1a and 1b. In the case of a divided structure around the drive shaft 6, the mechanical brake 11 in the first and second embodiments of FIGS. 1 to 3 and FIG. 8, and the drive in the third embodiment of FIGS. When the lock gear 40 is provided on the driven disk 13 of the mechanical brake 11 provided at one axial end of the shaft 6, the driven disk 13 can be integrated with the drive shaft 6.

Further, instead of providing the lock gear 40 on the driven disk 56 in the second embodiment, FIGS.
A lock body having a lock gear as described above may be provided and interposed, for example, inside the driven disk 56, that is, on the side of the side plate 1b, and may be connected to the drive shaft 6 so as not to rotate relatively. In the above-described embodiments, the belt loader is a belt loader. However, the present invention is also applicable to a lever-type hoisting tractor and a manual hoisting tractor having a handwheel used for hand operation such as fume pipe work. it can.

[0058]

According to the first aspect of the present invention, the driving shaft 6
Is provided with the lock gear 40 that is not rotatable relative to the drive shaft 6 and the lock claw 42 that engages with the lock gear 40 is provided on the apparatus main body 1.
Even if 1 or 51 is inadvertently loosened, the drive shaft 6 can be locked by the engagement of the lock claw 42 with the lock gear 40, so that the tightened state or the towed state of the load is loosened, or the load is lifted. You can prevent your luggage from slipping down.

[0059] In the invention of claim 2, wherein the mechanical vibration - key 5 1 lock gear 40 is provided on the outer periphery of the driven disc 56 constituting the reverse rotation preventing claw locking pawl 42 that engages with the lock gear 40 Because it was juxtaposed with 59 ,
Exceptionally without the need to provide a lock body having a lock gear, the mechanical vibration - key 5 1 can be configured by using components constituting the, thus, an increase in the number of components less the drive shaft 6
Can be locked.

According to the third aspect of the present invention, the belt can be wound, and a manual winding having a drive shaft 6 serving as a belt winding shaft and an operation lever 10 for driving the drive shaft 6 is provided. In the traction device, on one axial side of the drive shaft 6,
The transmission mechanism 12 having the mechanical brake 11 is
Further, a lock body 41 having a lock gear 40 is provided on the other side, and the lock claw 42 is provided on the side plate 1b located on the other side of the drive shaft 6, so that when the load is fastened by the drive rotation of the drive shaft 6, The tightened state includes a braking action by a mechanical brake 11 provided on both axial sides of the drive shaft 6,
The locking action by the engagement of the lock claw 42 with the lock gear 40 can be maintained, so that the locked state can be effectively maintained and the mechanical brake 11 can be loosened even if the mechanical brake 11 becomes loose. It is possible to effectively prevent the state from loosening and the collapse of the load.

According to the fourth aspect of the present invention, the operating lever 10 is connected to the pair of arms 10a and 10b and the grip 1
0c, and a lock body 41 and a second drive member 44 interlocked with the operation lever 10 are provided on the other axial side of the drive shaft 6, so that the grip portion 10c is used when tightening the load. When driving the operation lever 10 by grasping it,
This operating drive force can be transmitted to the drive shaft 6 from both axial sides of the drive shaft 6, so that the arm portions 10a, 10a of the operation lever 10 can be operated even when the load of loading is large.
0b can be prevented from being deformed, and the rigidity of the operation lever 10 can be reduced as compared with a structure in which the driving force is transmitted from one of the arms 10a and 10b. is there.

According to the fifth aspect of the present invention, since the lock body 41 and the driving member 44 are integrated, the axial length of the driving shaft 6 can be shortened. In other words, the lateral width of the apparatus main body 1 is reduced. Since it is possible to reduce the size, it is possible to reduce the size while obtaining the operation according to the third aspect of the present invention.

According to the sixth aspect of the present invention, the operation lever is provided.
10 is a pair of arm portions 10a and 10b and grip portion 10
c, and a mechanical brake 1 is provided between both sides of the drive shaft 6 in the axial direction and each of the arm portions 10a and 10b.
1 and 51, and the lock gear 40 is provided on at least one of the transmission mechanisms 12 and 52 on the outer periphery of the driven disk 56 of at least one of the transmission mechanisms. Can be transmitted to the drive shaft 6 from both axial sides of the drive shaft 6,
Therefore, even when the load of loading is large, the operation lever
10 can be prevented from being deformed, the stiffness of these arms 10a, 10b can be kept low, and the packing state can be reduced by the mechanical brakes 11, 51 of the two transmission mechanisms 12, 52. It can be held effectively by the braking action, and one mechanical brake 11
Or, even if 51 is relaxed, the packed state can be maintained by the other mechanical brake 51 or 11, and both mechanical brakes
Even if the keys 11 and 51 are loosened, the locked state by the locking action of the lock claw 42 engaged with the lock gear 40 can be maintained in the closed state, and the collapse of the load can be prevented, so that a safer device can be provided.

However, since the lock gear 40 is formed by using the driven disk 56 constituting a mechanical brake, the increase in the number of parts can be reduced and the drive shaft 6 can be locked.

[Brief description of the drawings]

FIG. 1 is a side view showing a first embodiment of the device of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is an enlarged cross-sectional plan view illustrating a cross section of a drive shaft, a transmission claw, and a position holding mechanism.

FIG. 4 is an enlarged partial cross-sectional view showing a cross section of a lock claw and a lock body.

FIG. 5 is a sectional view taken along line XX in FIG. 4;

FIG. 6 is a longitudinal sectional view showing a state in which a first belt is fixed to a drive shaft.

FIG. 7 is an exploded perspective view of a drive shaft.

FIG. 8 is an enlarged sectional plan view showing a second embodiment and corresponding to FIG. 3;

FIG. 9 is an enlarged sectional plan view showing a third embodiment and corresponding to FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Device main body 1a, 1b Side plate 6 Drive shaft 10 Operation lever 10a Arm part 10b Arm part 10c Grip part 11,51 Mechanical brake 12,52 Transmission mechanism 13,56 Driven disk 14,57 Brake ratchet wheel 16 Drive member 40 Lock gear 41 Lock body 42 Lock claw 44 Second drive member

Claims (6)

(57) [Claims] An apparatus body (1), a drive shaft (6) rotatably supported by the apparatus body (1), a manual operation member for driving and operating the drive shaft (6), and driving of the operation member In a manual hoisting and traction device having a transmission mechanism (12) or (52) having a mechanical brake (11) for transmitting an operation to the drive shaft (6), A lock gear (40) coupled to the drive shaft (6) so as to be relatively non-rotatable, and engaged with the lock gear (40) on the apparatus main body (1) to rotate the drive shaft (6) on the rewind side. A manual hoisting and towing device characterized by having a lock claw (42) for preventing the lifting. 2. A transmission mechanism (5 2) is screwed to the drive shaft (6), a drive member linked to the operation member (58), a driven disk coupled to the drive shaft (6) (56) And a ratchet wheel ( 57 ) interposed between the drive member ( 58 ) and the driven disk ( 56 ) and engaged with a reverse rotation preventing claw ( 59 ) to constitute a mechanical brake ( 51 ). A lock gear (40) is provided on an outer peripheral portion of the driven disk ( 56 ), and the reverse rotation preventing claw ( 5 ) is provided.
9. The manual hoisting and traction device according to claim 1, wherein the locking claw is arranged side by side. 3. An apparatus body (1) having a pair of side plates (1a) (1b), and side plates (1a) (1) of the apparatus body (1).
b) is rotatably supported by the belt, and enables the belt to be wound, and a drive shaft (6) serving as a belt winding shaft; an operation lever (10) for driving and operating the drive shaft (6); −
A manual hoisting / traction device comprising a transmission mechanism (12) having a mechanical brake (11) for transmitting the drive operation of (10) to the drive shaft (6); Is provided on one axial side of the drive shaft (6), and a lock body (41) having a lock gear (40) is provided on the other axial side of the drive shaft (6) so as to be relatively non-rotatable. ), The side plate (1a) located on the other side in the axial direction is provided with a lock claw (42) that engages with the lock gear (40) and prevents rotation of the drive shaft (6) on the belt rewind side. A manual hoisting and traction device characterized by the following: 4. An operation lever (10) includes a pair of arms (10a) (10b) and these arms (10a) (1).
0b) and a grip portion (10c) for connecting the arm portion (10a) on one axial side of the drive shaft (6).
A mechanical brake (1
A transmission mechanism (12) having 1) is provided. On the other axial side of the drive shaft (6), a lock body (41) having a lock gear (40) and a lock mechanism (10) interlocked with an operation lever (10) are provided. 2
The drive gear (44) is provided so as to be relatively non-rotatable, and engages with the lock gear (40) on a side plate (1b) of the apparatus body (1) located on the other axial side of the drive shaft (6). 4. The manual hoisting and towing device according to claim 3, further comprising a locking claw (42). 5. A lock body (41) and a second drive member (4).
The manual hoisting and traction device according to claim 4, wherein (4) and (4) are provided integrally. 6. The operation lever (10) includes a pair of arm portions (10a) (10b) and these arm portions (10a) (1).
0b) and a grip portion (10c) for connecting the drive shaft (6) in the axial direction and the arm portions (10).
a) (10b) and mechanical brake (1)
1) A transmission mechanism (12) (52) having (51) is provided, and a lock gear (40) is provided on the outer peripheral portion of the driven disk (56) in at least one of these transmission mechanisms (21) (52). 4. The manual hoisting and traction device according to claim 3, further comprising: