JPS62136494A - Coil lifter - Google Patents

Abstract

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

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to hooks for lanes used to carry various coils such as steel plate coils and printing paper webs into and out of warehouses, ships, etc. This invention relates to a coil lifter that is used by hanging the coil lifter.

[Background of the invention]

Conventionally, a widely used coil lifter is provided with a hook 63 on the top surface of a frame 61 that is hooked to a hook 62 of a crane, as shown in FIG. A pair of tongues 70 and 71 are supported by a link mechanism consisting of ゜69, and this tongue 7
0.71 is provided with claws 72 and 73 that are inserted into the center hole 10a of the coil 10 from the left and right, and the tongs 70°7
1, it has a structure in which both sides of the coil 10 are sandwiched and suspended.

[Problem that the invention seeks to solve]

However, in the structure of the conventional coil lifter described above, the claws are fixed, so if the distance between the coil to be lifted and an obstacle such as another coil or the wall of a warehouse or hold is small, the claws may interfere with the coil. There was a problem that the lifting work became impossible and the amount of cargo was reduced. Furthermore, since each coil is suspended and transported one by one, there is a problem of poor efficiency.

SUMMARY OF THE INVENTION An object of the present invention is to solve these problems and provide a coil lifter whose claws can be swung or lifted up and down, and which can hold a plurality of coils at the same time.

[Means for solving problems]

In the coil lifter of the present invention, a parallel link mechanism is provided on a support frame suspended by a crane, and a plurality of pairs of tong means for simultaneously lifting a plurality of objects to be transported are rotatably attached to the other end of the parallel link mechanism. The tongs are equipped with claws that can be rotated or raised and lowered at the tips of the tongs.

According to the above configuration, when suspending a plurality of coils, the tong means is rotated in accordance with the number of coils to be hoisted to increase the distance between the claws of the tongs to be greater than the coil diameter, and the tongs of the tongs used are Rotate or undulate it and lock it to the coil. A crane is then operated to lift the coil and transport it to the designated location.

〔Example〕

The present invention will be described below based on embodiments shown in the drawings.

FIG. 1 is a partially sectional front view of a coil lifter suspending a coil, and FIG. 2 is a side view taken in the direction of the arrow ▪ in FIG. 1.

The coil lifter 1 has an upper frame 2 and a lower frame 3.
, a parallel link mechanism 4, a tong 5, a tong rotation mechanism 6, a pawl 8, and a pawl elevation mechanism 9. In FIGS. 1 and 2, 10 is a coil of the transported object. .

The upper frame 2 has a pair of opposing upright parts 2a.

2b, and a connecting portion 2d that connects the upright portions 2a and 2b, forming a U-shape.

A latching shaft 11, which is an example of a latching portion, is fixed to the upper part of 2b, perpendicular to the upright portions 2a, 2b and latched to a hook 62 shown in FIG.

A connecting shaft 12 is fitted into the connecting portion 2d of the upper frame 2 while being restricted from moving in the axial direction, and a support frame 13 is pivotally attached to the connecting shaft 12 by a pivot 13a, which projects downward from the connecting portion 2d. There is. Further, a speed change gear 14 is fixed to a connecting shaft 12 that protrudes upward from the connecting portion 2d, and the speed change gear 14 is connected to a motor gear (not shown) that is fixed to a rotating shaft of a traveling motor 15 that is fixed to the upper frame 2. ) is engaged.

An opening/closing motor 16 is fixed to the support frame 13, and an opening/closing spindle 17, which is a screw rod that rotates in conjunction with the opening/closing motor 16, has an upper nut 18 fixed to the upper part of the lower frame 3 and an upper nut 18 fixed to the upper part of the lower frame 3. Lower nut 19 serving as a lower link support member provided below
are each screwed on.

One end of the pair of parallel link mechanisms 4A, 4B is pivotally connected to the lower frame 3, and each of the parallel link mechanisms 4A, 4B includes an upper link 20A, 20B, an intermediate link 2LA,
21B.

The other end of the parallel link mechanisms 4A and 4B is a seat 22A.

It is pivoted to 22B. Intermediate link 21A.

One end of lower links 24A, 24B is connected and pivoted to the other end of 21B, and the lower link 24A.

The other end of 24B is pivotally connected to the lower nut 19.

Tong frames 26A and 26B are fixed to the lower ends of the upper links 2OA and 20B, respectively, and in FIG.
Only shown. As shown in FIG.
At both left and right ends of A, there are 1. Second elevation tongs 5A, 5
B is pivotally mounted, and the first. second elevation tongs 5A,
A first fixing tong 5C is fixed to the middle part of the tong frame 5B so as to be perpendicular to the lower surface of the tong frame 26A.

A guide 31 having the same cross-section as the fixing tongue 5c is slidably inserted into the fixing tongue 5C.
1st. Second elevation tongs 5A.

One end of the elevation links 33A, 33B is pivotally connected to a collar 32 fixed to the lower part of the collar 5B, and the other ends of the elevation links 33A and 33B are respectively pivotally connected.

An elevation motor 35 is fixed to the support frame 13, and when the elevation motor 35 rotates, a drive mechanism 36 causes the first. Second elevation tongs 5A.

5B can rotate about 90' around the pivot point P of the tongue frame 26A while sliding the guide 31 along the first fixed tongue 5c.

The tong rotation mechanism 6 is provided in each of the tongs 5A, 5B, and 5C, and as shown in FIGS.
8 and an intermediate linking body 39.

It consists of a tongue rotating lever 40 and a moder cylinder 3.
The reciprocating motion of the tongs 8 operates a tong rotation lever 4o fixed to the upper end of each tong via an intermediate link 39, thereby rotating each tong along the axis.

A horizontal shaft 43 is fitted into the tip of each of the tongs 5A, 5B, and 5C with its movement in the axial direction restricted.

At the tip of the horizontal shaft 43 is a swinging claw 8A, a? 3. sc are fixed respectively. Each swing claw 8A, 8B.

8C is set so that its center of gravity is located below the axis of the horizontal shaft 43. In addition, each swing claw 8A, 8B, 8
G is provided with a claw locking sensor 45, respectively.

Also on the left upper link 20B in FIG.

As mentioned above, the tong frame 26B is fixed, and the 3rd and 4th elevating and elevating tongs 5D and 5E are pivotally attached to both left and right ends of the tong frame 26B. A second fixed tong 5F is fixed to an intermediate portion of the fourth elevating and elevating tongs 5D and 5E so as to be orthogonal to the lower surface of the tong frame 26B.

Third. The fourth elevating and elevating tongs 5D and 5E are the same as the aforementioned first. Similar to the second elevating tongs 5A and 5B, the tong frame 26
It is designed to be able to rotate approximately 90@ around the pivot point P of B.

Third. Elevation winders 8D, 8E are provided at the tips of the fourth elevating and elevating tongs 5D, 5E and the second fixed tongs 5F.

8Fs are each pivotally connected. The claw elevation mechanism 9 is.

Each tongue 5D, 5E, 5F is provided with
As shown in FIGS. 1 and 5, a mode in which the rotation of the elevating motor 46 is converted into reciprocating motion via the universal joint 48, the elevating spindle 50, which is a screw rod, and the nut 51 screwed onto the elevating spindle 50. A cylinder 52 is pivotally attached to each tongue 5D, 5E, 5F.

The tip of the piston 53 of the model cylinder 52 is tilted 8
It is pivotally mounted in the middle of D, 8E, and 8F.

Further, as shown in FIG. 1, an operating plate 55 is movably provided on the side of each tong, and when the coil 10 is clamped, the operating plate 55 is pressed, and its movement causes a limit switch (not shown) to be activated. for example, to illuminate an indicator light (not shown) that confirms a correct grasping motion.

Next, the operation of the embodiment of the present invention will be explained.

Connect the hanging shaft 11 of the upper frame 2 to the hook 6 of the overhead crane.
2 to suspend the coil lifter 1, and then operate an overhead crane to move the coil lifter 1 above the coil 10.

When the opening/closing motor 16 is driven, the opening/closing spindle 17 rotates, and the lower frame 3 and lower nut 19
moves, and the distance between the tongs 5 facing each other via each link is arbitrarily set.

Here, if the distance between the coil 10 to be lifted and another coil 1o or an obstacle such as a warehouse wall is smaller than the length of the claw 8 and larger than the width of the tongs 5, the tong rotation mechanism 6 is operated. The tongs 5A, 5B, and 5C are rotated by 90 degrees, and the swing claws 8A, 8B, and 8C are positioned parallel to the longitudinal direction of the coil 10. At the same time, the claw elevating mechanism 9 is operated to elevate the elevating winds 8D, 8E, and 8F onto the axes of the tongues 5D, 5E, and 5F. If there are no other obstacles, it goes without saying that the work can be done with the winter melon protruding horizontally toward the coil 10 and facing each other.

With the distance between the tongs 5 set to match the length of the coil 10 in this manner, the coil lifter 1 is lowered and stopped when the claw 8 of the tongs 5 substantially coincides with the center hole 10a of the coil 10. If the claws 8 are facing each other,
The opening/closing motor 16 is operated to move the lower frame 3 and the lower nut 19 upward, and the tongs 5 are moved inward while the claws 8 are held in the horizontal direction, so that the coil 10 is held between the tongs 5 and the claws 8. . In this case, the swinging claws 8A, 8B
, 8C are set below the center of rotation and the axis of the horizontal shaft 43, so each swing claw is reliably held in a fixed direction, and the locking state with the coil 10 is good.

On the other hand, the swing claws 8A, 8B, and 8G are parallel to the longitudinal direction of the coil 10, and the elevation claws 8D, 8E, and 8F are in the tongs 5D,
If they are located in the axial direction of 5E and 5F,
Operate the tong rotation mechanism 6 to rotate the tongs 5A, 5B, and 5G.
90'' in the opposite direction to the above, and the elevation mechanism 9
is operated to rotate the elevating claws 8D, 8E, and 8F in the opposite direction to that described above, and cause them to protrude horizontally toward the coil 1o.

After the center hole 10a of the coil 10 is supported by the winter melon 8 in this manner, the opposing tongs 5 are drawn inward by the aforementioned operation. At this time, a limit switch detects the clamping state of both end surfaces of the coil 10 via the operation plate 55, and when it is detected that the coil 10 is securely clamped, the opening/closing motor 16 stops. Further, when the claw locking sensor 45 detects that the claw 8 is securely locked in the center hole 10a of the coil 1o, the crane motor operates to lift the coil lifter 1 and transport it to another location. can be stacked.

By the way, the claw 8 of the tongs 5 and the center hole 10a of the coil 1o
If it is desired to align with the coil 10 or change the direction of the lifted coil 10, this can be easily done by rotating the travel motor 15.

Furthermore, when lifting three coils 10, the winter melon 8 is locked in the center hole 10a of the coil 10 as shown in FIG. 6, but when lifting two coils 10, the central swinging claw 8C and the elevation claw 8F to the center hole 1 of the coil 1o.
Do not let it lock at 0a. In addition, when lifting only one coil 10, as shown in FIG.
Lock it at ゜a.

In addition, if the weights of the coils 1o to be lifted are different, the lower frame 3 is different from the upper frame 2, and the support frame 1
3, the upper frame 2 swings about the pivot 13a, as shown by the broken line in FIG. 2, and the coil 1o is balanced.

In the embodiment, a maximum of three coils 10 are suspended, but it is also possible to adopt a structure in which the number of suspended coils 1o can be further increased.

〔Effect of the invention〕

As described above, according to the present invention, a plurality of pairs of tongs are provided, and a plurality of coils can be suspended by horizontal swinging and vertical elevation of the claws attached to the tips of the tongs, thereby facilitating cargo handling work. efficiency is improved. In addition, since the lower frame is pivotally connected to the upper frame via the support frame, it is possible to always maintain balance even when suspending multiple coils with different loads.
The center of gravity of the swing claw is set below the swing center, and the swing claw is always held in a fixed position, so the locking state with the coil is good, and a stable hanging state is always maintained, making it easy to work. Safety is maintained.

[Brief explanation of drawings]

Figures 1 to 8 relate to embodiments of the present invention; Figure 1 is a partially sectional front view of a coil lifter in which a coil lifter is suspended, and Figure 2 is viewed from the ■-■ arrow in Figure 1. 3 is an enlarged view showing the tong rotation mechanism in FIG. 2, FIG. 4 is a side view taken in the direction of the ■ arrow in FIG. 3, and FIG. 5 is an enlarged view showing the claw elevation mechanism in FIG. Figures 6 to 8 show the relationship between the coils and the claws. Figure 6 is a plan view when three coils are suspended, and Figure 7 is a plan view when two coils are suspended. FIG. 8 is a plan view of one coil suspended, and FIG. 9 is a front view of a conventional coil lifter. 1...Coil lifter, 2...Upper frame, 4
...Parallel link mechanism, 5 (5A, 58.5C, 5
0,5E,5F)...Tongs, 6...
・Tong rotation mechanism, 8 (8A, 8B, 8C, 8D, 8
E, 8F)...Claw, 9...Claw elevation mechanism, 1
1...Latching shaft, which is an example of a hanging part, 12
...Connection shaft 13...Support frame, 19...
Lower link support, lower nut serving as member, 62...
It's a hook. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] A parallel link mechanism is provided on a support frame suspended by a crane, and a plurality of pairs of tong means for simultaneously suspending a plurality of objects to be transported are rotatably attached to the other end of the parallel link mechanism,
A coil lifter characterized in that the tip of the tong is provided with a rotatable or undulating claw.