JP2004026498A - Winding-up and towing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a winding-up and towing machine liftable with a power by an auxiliary power input device fitted to a manual chain block, allowing a manpower load to be lowered, a working time to be shortened, and also a minute adjustment by manual operation to be performed with a furnished hand chain. <P>SOLUTION: This winding-up and towing machine comprises a transmission plate 16 engaged with the drive member 10 of the manual winding-up and towing machine and transmitting a power, a first input shaft 18 connected to the transmission plate 16 so that the power can be transmitted therebetween and engaged with a power means 26, and a second input shaft 21 connected to the first input shaft 18 through step-up gears 19a and 19b and engaged with the power means 26. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a manual chain block, and more particularly, to a manual chain block provided with an auxiliary power input unit.
[0002]
[Prior art]
BACKGROUND ART Conventionally, a manual chain block has been frequently used for lifting and lowering heavy objects. The manual chain block includes a chain block body, an upper hook provided at an upper end of the chain block body, a load chain hung on a load sheave of the chain block body, and a lower hook provided at a lower end of the load chain, Consists of a hand chain that is juxtaposed to the chain block body and hung on the hand wheel.The hand chain is pulled, the hand wheel is turned, the load chain is raised or lowered, and the heavy object suspended on the lower hook is raised and lowered. Things.
[0003]
However, the above-described conventional apparatus requires a large amount of human power during a high-load operation such as when performing a lifting operation of a heavy object, and also requires a long time operation when lifting and lowering a heavy object by long lifting. In addition, it is difficult to work continuously by one person, and it may be necessary to perform high-speed operation when there is no load.
[0004]
Therefore, as a means for reducing the load on the operator, a power coupling portion is provided on a rotating body that rotates the load sheave of the hoisting traction machine, and an electric driver is coupled to the power coupling portion, so that the power of the electric driver is reduced. For driving a hoisting traction machine, Japanese Patent Application Laid-Open No. H11-163,813 proposes a method for driving a hoisting traction machine.
[0005]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2000-212892 (FIG. 1 on page 5)
[0006]
[Problems to be solved by the invention]
However, the hoisting tractor described in the above-mentioned patent document only connects the electric screwdriver to the drive unit of the hoisting traction machine when the electric screwdriver is mounted on the hoisting traction machine. However, there is a concern that the electric screwdriver may be detached from the hoisting traction machine because the means for attaching the traction to the hoisting traction machine is not necessarily strong. In addition, when performing lifting and lowering operations of heavy loads, and when performing operations with no load, the hoisting and traction machine is driven at the same speed. However, it was not possible to shorten the time and make the lifting work more efficient. In addition, when the hoisting traction machine is moved up and down at a high speed using the external driving means, a case where the brake portion of the driving member is overheated occurs.
[0007]
According to the present invention, by mounting an auxiliary power unit on a manual chain block, it is possible to perform an ascending and descending operation by power, reduce a human load, shorten a working time, and also have a hand chain. The present invention provides a hoisting traction machine that can also adjust a minute lifting operation by manual operation, can prevent overheating of a handwheel brake unit when an auxiliary power device is mounted, and can easily and easily use the auxiliary power device. An object of the present invention is to provide a hoisting traction machine that can be securely fixed to the hoisting traction machine.
[0008]
[Means for Solving the Problems]
The present invention solves the above-described problems, and a transmission plate that engages with a handwheel of a hoisting traction machine and transmits power, and a transmission plate that is connected to the transmission plate so as to transmit power and engages with a power unit. The hoisting and traction machine includes a first input shaft, a second input shaft connected to the first input shaft via a speed-increasing gear, and detachably engaged with a power unit.
[0009]
According to the present invention, when performing lifting and lowering work of a heavy object, or when performing continuous lifting and lowering work for a long time, a power unit is attached to the first input shaft and automatic lifting and lowering is performed by a motor or the like. Thus, the work load can be reduced and the work time can be reduced. In addition, at the time of the no-load elevating operation, the power unit is mounted on the second input shaft, and the elevating operation is performed by a motor or the like. The time can be reduced, and the efficiency of the lifting operation can be increased.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
According to the first aspect of the present invention, a load sheave around which a load chain is wound, a hoisting traction machine main body including a handwheel for rotating the load sheave, and a power wheel engaged with the handwheel are provided. A transmission plate that transmits the power of the means to the handwheel, a first input shaft that is connected to the transmission plate so as to be capable of transmitting power, and is detachably engaged with the power unit, and via the first input shaft and the speed increasing gear. A hoisting and traction machine provided with a second input shaft which is connected and detachably engaged with the power means, and is used when performing lifting and lowering work of a heavy load or when performing long-term lifting and lowering work continuously. By mounting the power means on the first input shaft and performing automatic lifting and lowering by a motor or the like, the work load can be reduced and the working time can be reduced. Attached to the second input shaft , By performing the automatic lifting by a motor or the like, can save time, it is possible to perform efficient lifting work, has an action that can provide hoisting and pulling device which can fine elevation adjustment further manual.
[0011]
According to a second aspect of the present invention, the first input shaft, the second input shaft, and the speed increasing gear are mounted on a connection box, and the connection box is fixed to an end of a fixing bolt for fixing a main body frame of a hoisting and traction machine body. The connection box can be removed from the manual hoisting traction machine when working in places where it is difficult to supply power means, and can be used as a manual hoisting traction machine. It is light and has the effect of facilitating handling.
[0012]
The invention described in claim 3 is characterized in that the transmission plate and the handwheel are connected by a transmission shaft inserted into a fitting hole provided in the handwheel, and the driving plate is a driving member during the elevating operation. The handwheel shifts in the left-right direction, but since the transmission shaft is slidably fitted to the handwheel, the engagement between the handwheel and the transmission shaft is not affected. It has the function of enabling power transmission from the plate to the drive member.
[0013]
According to a fourth aspect of the present invention, the power unit has a locking piece projecting toward the connection box, and the connection box is provided near the end of the first input shaft and the second input shaft. Has a stopper that fits therein. When the power unit moves up and down, the power unit tries to rotate with the rotation of the motor, but this rotation is provided on the power unit. And a stopper.
[0014]
According to a fifth aspect of the present invention, there is provided a brake including a load sheave around which a load chain is wound, and a brake means, wherein the load sheave is rotated via the brake means and engages with the brake means on the inner surface. Surface, a handwheel having a wheel groove around the outer periphery of the handchain, a transmission plate engaged with the handwheel and transmitting the power of the power means to the handwheel, and a power transmission with the transmission plate. An input shaft connected to and detachably engaged with the power means; and a transmission shaft inserted into a fitting hole provided between the brake surface of the handwheel and the wheel groove, provided on the transmission plate. And the transmission plate for connecting the power transmission shaft with the wheel groove of the hand wheel, the outer diameter of the brake plate, and the wheel groove. Since the between, can be a through hole, it is easy to process and the hand wheel can size and weight.
[0015]
The invention according to claim 6 is provided with a load sheave around which a load chain is wound, a brake means provided inside, a handwheel for rotating the load sheave through the brake means, and engaging with the handwheel, A transmission plate for transmitting the power of the power means to the handwheel, an input shaft mounted on the connection box, connected to the transmission plate for power transmission, and detachably engaged with the power means; and a power means for the power means. It is characterized by comprising an air motor capable of reversing forward and reverse, and an air discharging means for cooling the brake means with air. By using an air motor as power means, the brake means can be cooled by the air. Therefore, it is possible to easily prevent the performance of the brake from lowering.
[0016]
The invention according to claim 7 is provided with a load sheave around which a load chain is wound, a brake means provided inside, a handwheel for rotating the load sheave via the brake means, and engaging with the handwheel, A transmission plate for transmitting the power of the power means to the handwheel, an input shaft mounted on the connection box, connected to the transmission plate for power transmission, and detachably engaged with the power means; and a power means for the power means. A power motor supporting frame, which is equipped with a power means, can be safely and easily attached to and detached from the connection box. Can be installed.
[0017]
The invention according to claim 8 is provided with a load sheave around which a load chain is wound, a brake means provided inside, a handwheel for rotating the load sheave via the brake means, and engaging with the handwheel, A transmission plate for transmitting the power of the power means mounted on the support frame to the handwheel, and an input shaft mounted on the connection box, connected to the transmission plate for power transmission, and detachably engaged with the power means. A fitting means provided on the support frame for fitting with a protruding member fixed to the connection box; a locking means comprising a retaining body for preventing the fitting means from being detached; and a power means for the power means And an air motor capable of reversing forward and backward, and air discharging means for cooling the brake means with the air of the air motor. The power means support frame fitted with a stage can be mounted safely and detachable easily connected box.
[0018]
According to a ninth aspect of the present invention, the air discharging means is an air hose communicating with an air motor, and a nozzle connected to the air hose and fixed to a connection box to cool an outer surface of the handwheel. It is possible to efficiently cool the handwheel including the brake plate with air discharged from the nozzle.
[0019]
The invention according to claim 10 is characterized in that the handwheel has an air supply hole for discharging air to the brake unit, and discharges air for cooling the outer surface of the handwheel from the air supply hole to the brake unit. By doing so, air can be sent directly to the brake unit, and the brake unit can be cooled efficiently.
[0020]
According to an eleventh aspect of the present invention, the locking means is a support bracket which is engaged with a power means side projection of a nozzle connected to the air hose. Rotation at the time of mounting the frame can be prevented, and the frame can be safely and easily mounted to the connection box.
[0021]
According to a twelfth aspect of the present invention, the locking means is a fitting member that fits into the power means side projection of the nozzle connected to the air hose. Rotation at the time of mounting the support frame is prevented, and the support frame can be safely and easily attached to and detached from the connection box.
[0022]
According to a thirteenth aspect of the present invention, the locking means engages with a fitting member that fits into the power means side projection of the nozzle connected to the air hose, and a retaining member fixed to the connection box. The power member support frame can be more securely and firmly attached to the connection box.
[0023]
The invention according to claim 14 is characterized in that the locking means has an L-shaped auxiliary bracket that comes into contact with the connection box, and prevents the power means support frame from rotating outward from the connection box. And it can be safely and easily attached to and detached from the connection box.
[0024]
The invention described in claim 15 is characterized in that the brake cooling air is exhaust air of the air motor, and by using exhaust air of the air motor, resource saving in brake cooling can be realized.
[0025]
[Embodiment 1]
An embodiment of the present invention will be described below with reference to FIGS. 1 is an enlarged front view showing a hoisting tractor according to Embodiment 1 of the present invention, FIG. 2 is a side view of a connecting box, and FIG. 3 is a state where the connecting box of the hoisting traction machine shown in FIG. 1 is removed. It is an enlarged front view shown. In the drawing, reference numeral 1 denotes a chain block main body as a hoisting traction machine, which includes a load sheave 2, a drive shaft 3 for driving the load sheave 2, a pair of main body frames 4 supporting the load sheave 2 and the drive shaft 3, and a main body frame 4. Fixing bolt 5 which is fixed and the tip of which penetrates cover 13 of drive device 9, load chain 6 wound around load sheave 2, upper hook 7 provided at the upper end of the chain block main body, and provided at the lower end of load chain 6 The lower hook 8 is provided. A driving device 9 drives the driving shaft 3 and is provided on one side of the main body frame 4 of the chain block main body 1. The driving device 9 includes a handwheel 10, which is a driving member screwed to an end of the driving shaft 3, a mechanical brake 11 for transmitting rotation of the handwheel 10 to the driving shaft 3 and preventing a suspended load from falling, The drive unit 9 is provided with a cover 13 having an opening 13 a having an inner diameter slightly larger than the outer diameter of the transmission plate 16 so that the transmission plate 16 can be inserted. Has been done. The handwheel 10 includes a wheel groove 10a for winding and holding the hand chain 12, a circular brake surface 10b abutting on the brake plate 30, and a fitting hole 10c penetrating through the handwheel 10. 3 is screwed so as to be able to advance and retreat. Reference numeral 14 denotes a power coupling device, which has a transmission plate 16 having a transmission shaft 15 fitted in a fitting hole 10c provided in the hand wheel 10, a transmission plate 16 and a speed increasing gear 19a spline-coupled, and a power means is fitted at a tip end. A first input shaft 18 having a mating portion 17; a second input shaft connected to the first input shaft 18 via a speed increasing gear 19b, spline-coupled to the speed increasing gear 19b, and having a power means fitting portion 20 at a tip end; The first input shaft 18, the second input shaft 21, and the speed increasing gears 19a, 19b are provided in a connection box 22 formed by a pair of frames 22a, 22b. The connection box 22 is detachably attached to the chain block main body 1 by screwing a connection nut 23 fitted in the connection box 22 to a fixing bolt 5 penetrating the cover 13 of the drive device 9. . Reference numeral 24 denotes a positioning member provided between the cover 13 and the frame 22a of the connection box 22, and has a length in contact with the outer end surface of the cover 13 so that the connection box 22 is securely fixed by the connection nut 23. Reference numeral 25 denotes an inverted U-shaped stopper which is provided near the first input shaft and the second input shaft of the frame 22b of the connection box 22 and in which a locking piece 27 provided on a power means 26 incorporating a motor fits. Reference numeral 29 denotes a brake receiver which is restricted by the step portion of the drive shaft 3 in the axial direction (leftward direction in FIG. 1) and is fitted so as to rotate integrally with the drive shaft 3, and 30 denotes a brake receiver 29 via a ratchet 31. A pair of ring-shaped brake plates 31 rotatably fitted to the gears are provided with teeth that engage with pawls (not shown) rotatably supported by pawl shafts 32, and are rotatable on brake receivers 29. It is a ratchet wheel fitted to the. 26 is a power means, 27 is a locking piece fitted to the above-mentioned inverted U-shaped stopper 25, 28 is a switch, and 37 is a power means fitted to the first input shaft 18 or the second input shaft 21 provided in the connection box 22. This is a power transmission unit that fits into the joints 17 and 20. The power unit 26, the locking piece 27, and the power transmission unit 37 constitute a power unit.
[0026]
Next, the operation of the hoisting and pulling machine according to the first embodiment will be described. When the load is moved up and down by the chain block, the power transmission part 37 of the power means 26 is fitted and mounted on the power means fitting part 17 of the first input shaft 18, and the power means 26 is mounted on the connecting device 14. The locking piece 27 provided on the power unit 26 is fitted to a stopper 25 provided on the connection box 22 to prevent the power unit 26 from rotating in the rotation direction of the power unit 26. When the switch 28 is turned on and a motor (not shown) is driven, the first input shaft 18 rotates, and the transmission plate 16 that is spline-coupled to the first input shaft 18 rotates, via the transmission shaft 15. By rotating the handwheel 10 and rotating the drive shaft 3 and the load sheave 2 via the mechanical brake 11, the load is lifted and lowered.
[0027]
Next, the detailed operation of the mechanical brake 11 will be described. When the load is to be hoisted, for example, clockwise rotation is transmitted to the handwheel 10, and the handwheel 10 is screwed with the drive shaft 3, so that the brake surface 10b moves forward in the left direction in FIG. Is pressed against the brake plate 30, so that the brake plate 30 and the ratchet wheel 31 can be tightened easily. Therefore, the brake plate 30 and the ratchet wheel 31 rotate together with the brake receiver 29 and the drive shaft, and rotate the load sheave 2 via the speed reducer. , Hoist the load. Note that the ratchet wheel 31 is held so as not to rotate in the load lowering direction by engagement with a pawl (not shown).
[0028]
On the other hand, when unloading the load, the handwheel 10 is rotated in the counterclockwise direction, whereby the handwheel 10 moves backward on the screwed drive shaft 3 to the right in FIG. The tightening of the surface 10b, the brake plate 30, the ratchet wheel 31, and the brake receiver 29 is released, and the load rotates the drive shaft via the load sheave 2 and the speed reducer in the lowering direction. 1 is pulled leftward, the above-described tightening force is generated again, and the lowering of the load is stopped. By this repetitive operation, the lowering is performed.
[0029]
As described above, at the time of unloading the load, the hand brake 10 is moved left and right on the screwed drive shaft by the action of the mechanical brake 11, but the transmission plate 16 and the hand wheel 10 have a certain length. Since the transmission shaft 15 is slidably fitted in the fitting hole of the handwheel 10 and linked, the transmission shaft 15 slides and absorbs the displacement of the handwheel 10 according to the length of the shaft, and the handwheel 10 , The power can be transmitted between the transmission plate 16 and the handwheel 10. Since the position of the fitting hole 10c in which the transmission shaft 15 is slidably fitted is between the wheel groove 10a of the hand wheel 10 and the outer diameter portion 10d of the brake surface, the functions of the brake surface 10b and the wheel groove 10a are provided. When the fitting hole 10c is provided on the side opposite to the brake surface 10b side of the handwheel 10, the through hole can be easily formed. Although it is necessary to increase the thickness, the embodiment of the present invention does not require the thickness, and has an effect of reducing the size and weight of the handwheel 10. In addition, at the time of high-speed lifting and lowering at the time of no load or the like, the power means 26 is fitted and mounted on the power means fitting portion 20 of the second input shaft 21, and the first input is performed from the second input shaft 21 via the speed increasing gear 19. By rotating the shaft 18, the load is moved up and down at a high speed by the same operation as in the above-described embodiment.
[0030]
In addition, when the luggage is lifted and lowered only by operating the hand chain 12, the power unit 26 is disconnected from the connecting device 14.
[0031]
[Embodiment 2]
Embodiment 2 of the present invention will be described with reference to FIGS.
[0032]
In the following description, the main body of the hoisting and traction machine is the same as that of Embodiment 1 except for the handwheel, and the description is omitted.
[0033]
In the present embodiment, an air motor capable of normal and reverse rotation is used as the power means 26.
[0034]
In the figure, reference numeral 33 denotes a support frame for supporting the air motor 26 as a power means, and a connecting portion to be connected to a connected portion 43 which communicates with a nozzle 41 provided in a connecting box 22 attached to a hoisting and pulling machine main body. 42. 34 is an air supply hose for supplying air to the air motor 26, 35 is an exhaust hose for discharging air exhausted from the air motor 26, and 37 is an air motor 26 from the air motor 26 via a power shaft 26a, a drive gear 26b, and a driven gear 26c. The power transmission unit that transmits power to the transmission plate 16 is fitted to the power means fitting portions 17 and 20 of the transmission plate 16 to transmit power to the transmission plate 16.
[0035]
The air motor 26 includes fins that rotate by compressed air. The air motor 26 of the present embodiment includes the air supply hose 34 including two air supply hoses 34a and 34b that rotate the fins in the forward and reverse directions, and the air supply hose 34 described above. An air exhaust hose 35 for exhausting air from the fin is provided.
[0036]
Further, in another air supply mode in the power means as shown in FIG. 15, the air supply hoses 34a and 34b have three-way check valves 55a and 55b for controlling air flow paths, respectively. Non-return valves 56a, 56b are provided at the connection portions of the air exhaust hose 35 with the 34a, 34b, respectively. Note that the three-way check valve is a valve that closes in one direction in the three-way flow path.
[0037]
When the air motor 26 is rotated forward, the air is supplied from the air supply hose 34a to the air motor 26 by the three-way check valve 55a, the air motor 26 is rotated forward, and the exhaust air is three-way reversed from the air supply hose 34b. The air is supplied to the air exhaust hose 35 via the stop valve 55b and the check valve 56b.
[0038]
On the other hand, when rotating the air motor 26 in the reverse direction, the air is supplied from the air supply hose 34b to the air motor 26 by the three-way check valve 55b, the air motor 26 is rotated in the reverse direction, and the exhaust air is supplied from the air supply hose 34a. The air is supplied to the air exhaust hose 35 via the three-way check valve 55a and the check valve 56a.
[0039]
The drive gear 26b and the driven gear 26c form a bevel gear mechanism. Reference numeral 38 denotes an L-shaped support bracket provided on the power means support frame 33, and a distal end of the L-shaped portion is fitted with a base end of a connected part 43 which is a power means side projection of a nozzle 41 described later. It has a bifurcated fitting portion 38a that fits. An auxiliary bracket 39 is provided on the power means support frame 33, is bent in an L shape, and has a bent end face attached to the frame 22b of the connection box 22. A power transmission section 40 is provided on the power means support frame 33. A bearing portion 41 for supporting the shaft 37 is fixed to the frame 22b of the connection box 22 and has an end for discharging air in opposition to an air supply hole 10e provided in the hand wheel 10 described later. 35 is a cooling nozzle communicating with 35. The air supply hole 10e is provided on the same arc as the fitting hole 10c in which the transmission shaft 15 is fitted, as shown in FIGS. 7 and 8, on the outer side in the circumferential direction of the brake surface 10b provided inside the hand wheel 10. ing. The air supply hole 10e can be a long hole as shown in FIG. 8 or a round hole as shown in FIG. 7, and if it is a round hole, it is easy to process and can be shared with the fitting hole 10c. It is suitable because it can be used. The cooling nozzle is fixed to the frame 22 b of the connection box 22, and a protruding portion protruding from the frame 22 b toward the power unit is engaged with a connecting portion 42 provided at an end of the air exhaust hose 35, and the air exhaust is performed. The connected portion 43 is connected to the hose 35. Since the connecting portion 42 and the connected portion 43 form a fluid coupling mechanism (coupler) as shown in FIG. 5, for example, it is suitable as a retaining member that can be easily attached and detached with one touch, and is a base end of the connected portion 43. The support bracket 38 fitted to the portion can be prevented from coming off.
[0040]
The attachment of the power means device of the present embodiment to the hoisting and traction machine main body and its operation will be described.
[0041]
Further, the support bracket 38 has been described as a two-pronged fitting portion 38, but a fitting hole for fitting with the connected portion 43 may be provided.
[0042]
The power means support frame 33 of the power means apparatus is brought closer to the connection box 22 side, and the power means transmission part 37 is fitted to the power means fitting part 17 or 20 of the input shaft 18 or 21, and at the same time, the air exhaust hose 35 The connecting portion 42 is connected to the connected portion 43 of the nozzle 41, the support bracket 38 is fitted to the base end of the connected portion 43 of the nozzle 41, and the power means device is fixed to the connection box 22. The auxiliary bracket 39 is attached to the frame 22b of the connection box 22 to prevent the power means support frame 33 from rotating outward.
[0043]
When the air motor 26 is driven by the compressed air supplied from the air supply hose 34, the input shaft 18 or 21 is rotated and transmitted via the power shaft 26a, the drive gear 26b, the driven gear 26c, and the power means transmission unit 37. The handwheel 10 is rotated by the plate 16. On the other hand, the exhaust air exhausted from the air motor 26 is discharged from the nozzle 41 toward the air supply hole 10 e of the hand wheel 10 to the outside surface of the hand wheel 10 via the air exhaust hose 35, and is discharged from the air supply hole 10 e. The discharged air cools the brake surface 10 of the handwheel 10.
[0044]
As described above, the power transmission part 37 provided on the power means support frame 33 is fitted to the power means fitting part 17 provided on the connection box 22, and the bifurcated fitting part 38 a of the support bracket 38 is fitted to the connection box 22. The power means support frame 33 is connected to the fixed nozzle 41 by fitting the base end of the connected portion 43 provided on the air motor 26 side and attaching the auxiliary bracket 39 to the frame 22 b of the connection box 22. The box 22 is securely mounted. That is, the power means support frame 33 is configured such that the power transmission section 37 is fitted to the power means fitting section 17 and the support bracket 38 is fitted to the base end of the connected part 42 of the nozzle 41 to thereby support the power means. Since the frame 33 can be prevented from rotating with respect to the connection box, and the auxiliary bracket 39 extending from the power means support frame 33 is brought into contact with the frame 22b of the connection box 22, the power means support frame 38 Are pivoted outward from the connection box 22 to prevent attachment and detachment.
[0045]
As shown in the figure, a bevel gear mechanism is employed for the drive gear 26b and the driven gear 26c to change the power transmission direction by 90 degrees, so that the power means 26 can be provided below the drive gear 26b. Since the width of the device can be reduced, operation can be performed even in a narrow place.
[0046]
The compressed air is used as a power means, and the exhaust air is cooled from the nozzle 41 through an air exhaust hose 35 to the outer surface of the handwheel 10, and the air is braked from an air supply hole 10 e provided in the handwheel 10. By supplying to the surface, the brake surface 10b of the handwheel 10 can be cooled.
[0047]
Further, since the power transmission plate 16 is formed in a cross shape as shown in FIG. 7, the air supply holes 10e provided in the handwheel 10 are not closed by the transmission plate 16, so that the air permeability of the air supply holes 10e is impaired. Thus, the cooling efficiency of the brake surface can be improved.
[0048]
As shown in FIGS. 7 and 8, the cover 13 is provided with openings 13b for passing the hand chain 12 on both sides of the cover 13, so that oil mist is mixed in the air. By connecting the connecting portion 42 of the air exhaust hose 35 to the connected portion 43b of the nozzle 41 provided on the opening 56 side, the oil mist-mixed air is easily discharged to the outside, and The entry of air can be prevented, and a decrease in brake performance due to oil mist can be prevented. In this case, the air supply hole 10e is closed.
[0049]
[Embodiment 3]
In the embodiment of the present invention, the power means side projection of the nozzle is directly fitted to the power means support frame, and the nozzle engaging means is different from that of the second embodiment. Same as form 2
Hereinafter, the present embodiment will be described with reference to FIGS. In the figure, a nozzle 41 is fixed to a frame 22b of a connection box 22, and a protruding portion of the nozzle 41 from the frame 22b toward the power unit 26 is a connected portion 43 which is a hollow protruding shaft, The support frame 33 is fitted in a fitting hole 33a, and has a retaining groove 43c at a distal end portion into which a locking body 46 described later is fitted. Further, the end of the connected portion 43 is engaged with the connecting portion 42 provided at the end of the air exhaust hose 35, and is connected to the air exhaust hose 35. The end of the connected portion 43 is a tapered portion 43d, and smoothly guides the fitting hole 33a and the locking body 46 when the power means support frame 33 is fitted into the nozzle 41. The locking body 46 has one end pivotally supported by a support shaft 47 provided on the power means support frame 33, and an operating lever 48 for opening and closing the locking body 46 at the other end. Further, a spring 50 is wound around the support shaft 47, and applies a biasing force to the locking body 46 to rotate downward. Reference numeral 49 denotes a stopper with which the end of the locking body 46 is engaged. 43a and 43b shown in FIG. 11 are connected portions of the nozzle, and 43b is provided on the opening 13b side of the cover 13 as described in the second embodiment, and discharges air containing oil mist to the outside. Used to make it easier.
[0050]
In the present embodiment, the connected portion 43, which is the protruding portion of the nozzle 41 on the power means side, is directly engaged with the power means support frame 33, so that the support bracket 38 in the second embodiment is unnecessary, and the power means support frame is not required. 33 can be securely fixed to the connection box 22 and the distal end of the connected portion 43 is locked by the locking body 46, whereby the connected state of the connected portion 43 and the fitting hole 33 is removed. Can be prevented.
[0051]
[Embodiment 4]
This embodiment is different from the third embodiment in that the connecting frame and the power means supporting frame are provided with fixing means for fixing both, but the other configuration is the same as that of the embodiment. Is omitted.
[0052]
Hereinafter, the present embodiment will be described with reference to FIGS. In the drawing, reference numeral 52 denotes a frame extending from the frame 22b of the connection box 22 to the power means side, and is a retaining member. Reference numeral 53 denotes a pair of frames extending from the power means support frame 33 toward the connection box 22 and sandwiching the retaining member 52, and is a locking member. The retaining member 52 has a concave portion 52a at the tip and a narrow portion 52b which is an opening at the end of the concave portion. The locking member 53 is slidably supported by the frame 52, and has a large diameter equal to the concave portion 52a. A locking pin 54 having a portion 54a and a small diameter portion 54b having the same diameter as the narrow width portion 52b is provided. When attaching the power means support frame 33 to the connection box 22, the small diameter portion 54 b of the retaining pin 54 is set between the frames of the locking member 53, and the locking member 53 is moved from the narrow width portion 52 b of the retaining member 52. The power means support frame 33 can be securely and firmly fixed to the connection box 22 by pushing into the concave portion 52a, sliding the locking pin 54, and fitting the large diameter portion 54a into the concave portion 52a. .
[0053]
【The invention's effect】
According to the present invention, when performing lifting and lowering work of a heavy object or performing lifting and lowering work for a long time, the power load is attached to the first input shaft and the automatic lifting and lowering by a motor or the like is performed, thereby reducing the work load. In addition, when performing a no-load elevating operation, a power means is attached to the second input shaft and the elevating / lowering operation is performed by a motor or the like. Work efficiency can be improved, and furthermore, the connection box having the first and second input shafts is detachably screwed to the handwheel, so that it can be used as a manual chain block alone. In addition, power is transmitted without being affected by the lateral displacement of the driving member during the elevating operation, and the rotation of the power unit can be prevented during the operation of the power unit.
[0054]
In addition, by using an air motor for the power means and cooling the brake part of the handwheel with exhaust air, it is possible to prevent the deterioration of the braking performance, and the power means can be safely and easily attached to and detached from the hoisting traction machine Has the effect that can be.
[Brief description of the drawings]
FIG. 1 is a front view showing a hoisting traction machine according to Embodiment 1 of the present invention.
FIG. 2 is a side view of a frame part of the connection box of FIG. 1;
FIG. 3 is an enlarged front view showing a state where a connection box of FIG. 1 is removed.
FIG. 4 is a front view showing a hoisting and traction machine according to Embodiment 2 of the present invention.
FIG. 5A is an enlarged side view of the connection box shown in FIG. 4; (B) is an enlarged view showing a connection portion between the nozzle and the air exhaust hose.
FIG. 6 is a front view showing a state where the support frame of FIG. 4 is separated.
FIG. 7 is a side view showing the handwheel and the transmission plate of FIG. 4;
FIG. 8 is a side view showing another embodiment of FIG. 7;
FIG. 9 is a front view showing a hoisting and pulling machine according to Embodiment 3 of the present invention.
FIG. 10 is a front view showing a state where the support frame of FIG. 9 is separated.
FIG. 11 is an enlarged side view of the connection box of FIG. 9;
FIG. 12 is a front view showing a hoisting and pulling machine according to Embodiment 4 of the present invention.
FIG. 13 is a front view showing a state where the support frame of FIG. 12 is separated.
FIG. 14 is an enlarged side view of the connection box of FIG.
FIG. 15 is an enlarged front view showing another form of air supply in the power means.
[Explanation of symbols]
1 Chain block body
2 Road sheave
3 Drive shaft
4 Body frame
5 Fixing bolt
6 Road chain
7 Upper hook
8 Lower hook
9 Drive
10 Handwheel
10a Wheel groove
10b brake surface
10c fitting hole
10d Brake surface outer diameter
10e Air supply hole
11 Mechanical brake
12 Hand chain
13 Cover
13a Cover opening
13b Opening (hand chain opening)
14 Connecting device
15 Transmission shaft
16 Transmission plate
17 Power means fitting part
18 1st input shaft
19a, 19b Speed-up gear
20 Power means fitting part
21 Second input shaft
22 Connecting box
22a frame
22b frame
23 Connecting nut
24 Positioning member
25 Stopper
26 Power means
26a Power shaft
26b drive gear
26c driven gear
27 Locking piece
28 switch
29 Brake receiver
30 brake plate
31 Claw Wheel
32 claw shaft
33 power means support frame
33a fitting hole
34 Air supply hose
35 Air exhaust hose
37 Power transmission unit
38 Support bracket
38a bifurcated fitting
39 Auxiliary bracket
40 Bearing
41 nozzle
42 Connection
43, 43a, 43b Connected parts
43c Retaining groove
43d taper part
45 Locking frame
46 Locking body
47 Support shaft
48 Operation lever
49 Stopper
50 spring
51 rib
52 Retainer
52a recess
52b narrow part
53 Locking member
54 Lock Pin
54a Large diameter part
54b small diameter part
55a, 55b Three-way check valve
56a, 56b check valve

Claims (15)

A load sheave around which a load chain is wound, a hoisting traction machine main body including a handwheel for rotating the load sheave, a transmission plate for engaging with the handwheel and transmitting power of a power unit to the handwheel; A first input shaft that is connected to the transmission plate so as to be capable of transmitting power and detachably engages with the power unit; and a first input shaft that is connected to the first input shaft via a speed increasing gear and is detachably engaged with the power unit. A hoisting and traction machine comprising a second input shaft that performs the following. The first input shaft, the second input shaft, and the speed increasing gear are mounted on a connection box, and the connection box is detachably screwed to an end of a fixing bolt for fixing a main body frame of the hoisting and traction machine main body. The hoisting traction machine according to claim 1, characterized in that: 3. The hoisting traction machine according to claim 1, wherein the transmission plate and the handwheel are connected by a transmission shaft inserted into a fitting hole provided in the handwheel. The power means has a locking piece protruding toward the connection box, and the connection box has a stopper near the end of the first input shaft and the second input shaft to which the locking piece fits. The hoisting traction machine according to claim 1, wherein: A load sheave around which the load chain is wound, and a brake means provided inside, the load sheave is rotated via the brake means, a brake surface engaging with the brake means is provided on an inner surface, and a hand chain is provided around the outer periphery. A handwheel having a rotating wheel groove, a transmission plate that engages with the handwheel and transmits the power of the power means to the handwheel, and is connected to the transmission plate so that power can be transmitted, and is detachably attached to the power means. The transmission plate is provided with an input shaft to be engaged and a transmission shaft inserted into a fitting hole provided between the brake surface of the handwheel and the wheel groove, and the transmission shaft connects the handwheel and the transmission plate. Hoisting traction machine. A load sheave around which a load chain is wound, a handwheel provided with brake means inside, and rotating the load sheave via the brake means; and engaging with the handwheel to transmit the power of the power means to the handwheel. A transmission plate, an input shaft mounted on the connection box, connected to the transmission plate so as to be capable of transmitting power, and detachably engaged with the power means, and a reversible air motor which is a power means of the power means. A hoisting traction machine comprising air discharging means for cooling the brake means with air. A load sheave on which a load chain is wound, a handwheel provided with brake means inside, and rotating the load sheave via the brake means, and a power means engaged with the handwheel and mounted on a support frame. A transmission plate for transmitting power to the handwheel, an input shaft mounted on the connection box, connected to the transmission plate for power transmission, and detachably engaged with power means, provided on the support frame; A hoisting and towing machine, comprising: a fitting means for fitting with a projecting member fixed to a box; and a locking means comprising a retaining body for preventing the fitting means from being detached. A load sheave on which a load chain is wound, a handwheel provided with brake means inside, and rotating the load sheave via the brake means, and a power means engaged with the handwheel and mounted on a support frame. A transmission plate for transmitting power to the handwheel, an input shaft mounted on the connection box, connected to the transmission plate for power transmission, and detachably engaged with power means, provided on the support frame; A fitting means for fitting with a projecting member fixed to the box, a locking means comprising a retaining body for preventing the fitting means from being detached, and a forward / reverse rotatable air motor which is a power means of the power means. A hoisting traction machine comprising an air discharging means for cooling the brake means with air from the air motor. 9. The air discharge means is an air hose communicating with an air motor, and a nozzle connected to the air hose and fixed to a connection box to cool an outer surface of the handwheel. Hoisting machine. The hoisting traction machine according to any one of claims 6, 8, and 9, wherein the handwheel has an air supply hole for discharging air to a brake unit. The hoisting traction machine according to claim 9 or 10, wherein the locking means is a support bracket that engages with a protruding portion of the nozzle connected to the air hose on the power means side. The hoisting traction machine according to claim 9 or 10, wherein the locking means is a fitting member that fits with a protruding portion of the nozzle connected to the air hose on the power means side. The locking means is a fitting member that fits into the power means side projection of the nozzle connected to the air hose, and a locking member that engages with a retaining member fixed to the connection box. The hoisting traction machine according to claim 9 or 10. The hoisting traction machine according to any one of claims 8 to 13, wherein the locking means has an L-shaped auxiliary bracket that comes into contact with the connection box. The hoisting traction machine according to claim 6, wherein the brake cooling air is exhaust air of the air motor.

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