JPH0759473B2 - Electric chain block - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an electric chain block mainly used for suspending a chain on both sides in the length direction of an object to be suspended and performing both suspension operations.

(Prior Art) Conventionally, as this kind of electric chain block, lower hooks are provided on both sides in the length direction of a load chain that is hung on a load sheave, and these hooks are locked to both sides of a suspended object. It has already been known that the hanging inclination angle can be changed while rotating the load sheave so that the object to be hung is in both hanging states.

(Problems to be Solved by the Invention) In the electric chain block described above, however, it is possible to change the hanging inclination angle of the suspended object by rotating the load sheave. Since the lifting and lowering operations cannot be performed in both suspension positions, a separate electric chain block for lifting and lowering is required to perform the lifting and lowering operation of the object to be suspended.

As a result, two electric chain blocks equipped with a pair of side plates, one load sheave and a drive motor are used, and one electric chain block is used to suspend the hanging inclination angle of the suspended object. The number of parts can be reduced, the structure can be simplified, the weight can be reduced, and the cost can be reduced as compared with the case where the other electric chain block is used to raise and lower in both suspension states.

The present invention has been made in view of the above problems, and an object thereof is to be able to change a hanging inclination angle of an object to be hung and also to perform a lifting operation at the same time. It is possible to reduce the weight of the product and to provide it at a low price.

(Means for Solving the Problems) In order to achieve the above object, in the present invention, a pair of left and right side plates (1) (1) and a hanging portion (2a) of a load chain (3) are provided. And a pair of load sheaves (2) (2) having shaft portions (2b) (2b) protruding outward from both ends of the hanging portion (2a) and arranged between the side plates (1) (1). 2) and a drive motor (7) arranged on the outer side of the side plate (1), and each shaft portion (2b) (2b) of the load sheave (2) (2) is provided with The side plates (1) and (1) are rotatably supported, and the load sheaves (2) and (2) are interlockingly connected to the drive motors (7) so as to be independently driven. It is a thing.

(Operation) A load chain (3) having a suspender (F) is hung on each of the load sheaves (2) (2), and the suspenders (F) (F) of these load chains (3) (3) are suspended. ) On both sides of the suspended object, and the load sheaves (2) (2)
By rotating independently, while the suspended object is in both suspension posture, change of the suspension inclination angle,
The operation of raising and lowering the suspended object can be performed at the same time.

(Embodiment) The electric chain block shown in FIG. 1 and FIG. 2 has a pair of side plates (1) (1) which are arranged facing each other at a predetermined interval on the left and right, and a load chain (3). ) Has a hanging portion (2a) and shaft portions (2b) (2b) protruding outward from both ends of the hanging portion (2a), and each side plate (1)
(1) A pair of load sheaves (2) (2) placed between
And a drive motor (7) arranged on the outer side of the side plate (1), the load sheave (2)
The shaft portions (2b) and (2b) of (2) are rotatably supported in parallel on both sides in the width direction at the central portion between the side plates (1) and (1), and the load sheaves (2) are also supported. A chain presser (4) having a presser groove (4a) of the load chain (3) hooked on each load sheave (2) is disposed on the outer peripheral portion of the chain presser (4). The chains (3) are guided along the outer periphery of the load sheaves (2) by the holding groove (4a).

Further, support plates (5) and (5) are arranged on both outer sides of the side plates (1) and (1) at predetermined intervals so as to face each other, and the outside of each of the plates (5) is arranged. Motors (7) capable of driving the load sheave (2) in the forward and reverse directions by attaching covers (6) (6) to the respective sides, and driving the load sheave (2) inside the covers (6).
And a motor brake (8) are arranged, a reduction gear mechanism (9) is interposed between each side plate (1) and each support plate (5), and each reduction gear mechanism ( The rotation power of each motor (6) is
Each of them is independently transmitted to each of the load sheaves (2).

The reduction gear mechanism (9) includes a first gear (9a) provided at a shaft end of a motor shaft (7a) extending from the motor (7) inward of the support plate (5), and an intermediate shaft (9b). ) A second gear (9c) supported on the first gear (9a) and meshing with the first gear (9a).
And a third gear (9d) formed on the intermediate shaft (9b),
It is provided on the shaft of the load sheave (2) and is composed of a fourth gear (9e) which meshes with the third gear (9d).

In the above embodiment, two motors (7) and (7) are used to drive the load sheaves (2) and (2), respectively, but in the present invention, one motor (7) is used. Alternatively, the rotational power of the motor (7) may be individually and independently transmitted to each of the load sheaves (2). In the embodiment of FIGS. 1 and 2, the hook side chain (3) of the chain presser (4)
The lower part of the chain presser (4) is cut out so that the presser groove (4a) of the chain presser (4) covers only the upper half of the load sheave (2). A pair of laterally-extending limit levers (10) are arranged at the parts so as to face the side plates (1), and at the central parts of these limit levers (10),
A limit shaft (11) having a rectangular cross section is inserted and fixed, and an end of the limit shaft (11) is attached to the outside of the support plate (5). The limit switch (12) is linked.

Further, elongated holes (10a) (10b) are formed on both sides of the limit shaft (11) in the limit lever (10) in the lateral direction, and the chain (3) is formed in each of the elongated holes (10a) (10b). ) The first manipulator (13) that guides the hook side through
And movably supports a second operating element (14) for guiding the free end side of the chain (3) through the upper end of the first operating element (13) and the holding groove (4a). ), Which has a guide hole (15a) for the chain (3) between the chain guide (1) and the opening (4b) opened on the lower end side.
5) is interposed so as to follow the movement of the first operator (13).

Each of the chain guides (15) has a pair of support plates (16) facing the side plates (1) fixed to the lower side of the chain presser (4), and is oblique to the support plate (16). An elongated hole (16a) extending upward is formed, and the elongated hole (16a) is movably supported.

Further, the first operating element (13) is formed by two first and second constituent members (13A) and (13B), and the first member (13A) is shown in FIGS. 4 and 5. As shown, the overall appearance is formed into a substantially rectangular shape, and shaft portions (13a) (13a) that are inserted into the elongated holes (10a) of the limit levers (10) are integrally provided at the outer peripheral facing portions thereof. , A plurality of locking step portions (13b) are provided at the outer peripheral portion in the lengthwise intermediate portion, while the cylindrical hole (13
c) is opened, and a cross-shaped guide hole (13d) through which the chain (3) is inserted is opened from the cylindrical hole (13c) to the other side.

On the other hand, as shown in FIGS. 6 and 7, the second component member (13B) is provided with a large-diameter flange portion (13e) having a rectangular shape on one side in the length direction. ) To the first member (13
The locking step (13f) facing each locking step (13b) of (A) is formed, and at the other side in the length direction of the collar (13e),
A tubular portion (13g) that can be inserted into the tubular hole (13c) of the first member (13A) is formed, and the first portion is provided inside the tubular portion (13g).
A guide hole (13h) of the chain (3) similar to the guide hole (13d) formed in the member (13A) is formed.

Then, as shown in FIG. 8, the first component (13
The tubular portion (13g) of the second component member (13B) is movably inserted into the tubular hole (13c) of (A), and each locking step portion (13b) of the first member (13A) and the A bolt (13i) is inserted between each locking step (13f) of the second member (13B), and each locking step (13b) is provided at the outer peripheral portion of each bolt (13i). By inserting the spring (13j) between the (13f), the second member is inserted into the first member (13A).
While the member (13B) is movably supported, the guide holes (13d) (13h) provided in the members (13A) (13B) are provided.
Match the cross shape of each of the guide holes (13d)
The chain (3) is inserted and guided between (13h).

Further, the second operating element (14) has a generally rectangular outer appearance, and has a shaft portion (14a) which is inserted into the elongated hole (10b) of the limit lever (10) at an outer peripheral facing portion thereof. In addition to being integrally provided, a cross-shaped guide hole for guiding the chain (3) through the inside is provided.

Further, the first operator (13) and the chain retainer (4)
The chain guide (15) is interposed between the lower end opening (4b) of the chain guide (1).
As is clear from FIG. 9, 5) has a cross-shaped guide hole (15a) for guiding the chain (3) formed inside the shaft center, and has a support plate (16) at the outer peripheral facing portion. A shaft portion (15b) that can be inserted into the long hole (16a) is integrally provided. Incidentally, (17) in FIG. 3 is a chain bucket for accommodating the load chain (3) on the unloaded side, and (18)
Is an operation switch for controlling each motor (7).

Suspended object (A) using the above electric chain block
As shown in Fig. 3,
A suspending tool (hereinafter, referred to as a lower hook) (F) such as a lower hook provided at a tip of each load chain (3) extending from each of the load sheaves (2) (F) is a length of the suspended object (A). The motors (7) are engaged with each other in the vertical direction when the suspended object (A) is moved up and down in the horizontal position (a), as shown by the solid line in the figure. ), The load sheaves (2) are simultaneously driven to rotate, and the suspended object (A) is passed through the chains (3).
Both sides of the are moved up and down over the same length. Also, the suspended object (A) that is hung on both sides in the horizontal posture (a).
Is changed to the inclination posture of (b) indicated by the phantom line in the figure, the load sheave (2) on the one side is stopped and only the load sheave (2) on the other side is rotationally driven to With the load chain (3) suspended on the load sheave (2), one side in the length direction of the suspended object (A) is raised upward. As described above, when the suspended object (A) is tilted and is lifted to the position (C) shown by the phantom line in the figure, the suspended object (A) is held in the inclined position. As it is, the load sheaves (2) are simultaneously driven to rotate, and the both sides of the suspended object (A) are raised over the same length via the respective chains (3).

Further, when changing the suspended object (A) suspended on the horizontal posture (a) to the inclined posture (d) at the same height, the load sheaves (2) and (2) are simultaneously moved. That is, the load sheave (2) on one side is rotationally driven in the winding direction, and the load sheave (2) on the other side is rotationally driven in the winding direction.

In the embodiment shown in FIG. 1 and FIG. 2 during such double-hanging work, the chain presser (4) is shaped so as to cover only the upper half of the load sheave (2) and the lower part of the presser groove (4a). The side is open, and the first operating element (13) disposed on the movement locus of the chain (3) at the lower side of the holding groove (4a) is the first movable element. And the second member (13A) (13B), and the chain guide (15) is provided between each operator (13) and the lower end opening (4b) of the holding groove (4a). Is installed,
Since the inclination allowable angle of the chain (3) can be set to a large value, it is possible to easily carry out both hanging work and horizontal pulling work, and to use the chain (3) with a large tilt. In this case, the operating element (12) moves in the length direction of the limit lever (10) together with the chain (3), so that the malfunction of the limit switch (12) can be reliably prevented. The manipulator (1
Since the chain (3) passing between 3) and the chain presser (4) is guided by the chain guide (15) that follows the operating element (13), the chain (3) is operated by the operating element (3). The chain (3) can be smoothly guided without being clogged between the 13) and the chain presser (4).

Further, in the embodiment of FIG. 1, two upper hooks (17) (17) are supported facing each other on the upper side in the middle of each side plate (1), and these respective hooks (17) are supported. Although the electric chain block can be stably fixed via the above, one of the hooks (17) can be supported at the central portion of each of the side plates (1), and further, A connecting fitting or the like may be used instead of the hooks (17) to directly fix the electric chain block to the trolley or the like.

(Effects of the Invention) As described above, in the electric chain block of the present invention, each load sheave (2) (2) can be independently driven to rotate in the winding direction or the winding direction, and each load sheave can be driven. Since (2) can be rotationally driven at the same time, the suspended object can be a double suspension system and the suspending inclination angle of this suspended object can be changed, and each load sheave can be rotationally driven simultaneously. The suspended object can be lifted and lowered. Therefore, two electric chain blocks equipped with a pair of side plates, one load sheave and a drive motor are used,
The number of parts can be reduced compared to the case where the hanging inclination angle of the object to be hung is changed by one electric chain block and the lifting angle is changed by the other electric chain block. Thus, the structure can be simplified, the weight can be reduced, and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a front sectional view showing an essential part of an electric chain block according to the present invention, FIG. 2 is a plane sectional view of the same part, and FIG. 3 is a drawing showing a usage state of the electric chain block in a simplified manner.
FIG. 4 is an enlarged front view of a first component member constituting the first operating element, FIG. 5 is a half sectional view of the same, FIG. 6 is an enlarged front view of the same second component member, and FIG. Figures and 8 show the first and second
FIG. 9 is a half sectional view showing the assembled state of the constituent members, and FIG. 9 is an enlarged sectional view of the chain guide. (1) …… Side plate (2) …… Load sheave (3) …… Load chain (7) …… Motor

Claims (1)

[Claims] 1. A pair of left and right side plates (1) (1), a hanging portion (2a) of a load chain (3) and both ends of the hanging portion (2a) project outward. Shaft (2b)
(2b), a pair of load sheaves (2) and (2) disposed between the side plates (1) and (1), and a drive motor disposed on the outer side of the side plates (1). (7), the shaft portions (2b) and (2b) of the load sheaves (2) and (2) are rotatably supported by the side plates (1) and (1), and the load sheaves ( 2) An electric chain block in which (2) and (2) are interlockingly connected so as to be independently driven.