JP2748668B2 - Article lifting equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to an article lifting apparatus for lifting or hanging heavy objects such as metal rods and pipes to predetermined positions.

[Conventional technology]

Conventionally, in the lifting or lifting process of a heavy material such as a rod or a pipe, a bendable long support such as a wire is wrapped around a lower side of the rod or the pipe, and the support is hung by a crane or the like. Is being done.

[Problems to be solved by the invention]

However, according to the above-mentioned conventional method, it is necessary to obtain a so-called staking operation of wrapping a wire or the like under the article, and the staking operation must be performed so that the article can be lifted in a well-balanced manner. If the balance is poor, there is a great danger that the lifted articles will fall off the support and be fatal.

Therefore, an object of the present invention is to provide an article lifting apparatus capable of safely performing sling processing on articles such as bars and pipes without manual operation.

[Means for solving the problem]

According to the present invention, in accordance with the object, a main frame, a pair of sub-frames provided on the main frame so as to be able to approach and separate from each other in a first direction along the main frame, and a second sub-frame crossing the first direction A pair of hanging arms provided on each of the sub-frames so as to be able to approach and separate from each other in a direction, and a non-bend back chain which is passed between the hanging arms of each pair and which enters and exits the arms with the approach and separation of the pair of arms. A bendable connecting member for connecting an end of each of the chains to a fixed position of the sub-frame, and supporting the chain so as not to bend even if it receives a load from above, and the hanging arm of the chain Chain support and guide means provided on each of the hanging arms for guiding in and out of the connecting member, and the connecting portion so as to prevent the connecting member from being loosened. A guide member on each of the hanging arms and a guide member disposed on each of the sub-frames and having both ends connected to the main frame between the pair of sub-frames and having a smaller diameter than the bendable and non-bend back chain. A sling member, a fulcrum member provided at the lower end of each hanging arm for bridging the respective slinging member along the non-bend back chain between a pair of hanging arms lower ends on the corresponding sub-frame, A slack removing device provided on the main frame for applying an elastic lifting force to the slewing member so as to stretch the slewing member over the fulcrum member between the support members, and a slack removing device for hanging the fulcrum member on the slewing member. And a fulcrum member driving device provided on the hanging arm for being disposed at one position or a second position to be removed. That there is provided an article lifting device.

(Operation)

According to the article lifting device of the present invention, articles such as bars and pipes are processed as follows.

First, initially, a fulcrum member at the lower end of each of the hanging arms is arranged at the first position, and each slinging member is bridged over a fulcrum member on a corresponding pair of hanging arms, and
The slack removing device resiliently pulls up and stretches between the fulcrum members along the non-bend back chain.

In this state, the main frame hung by a crane or the like is placed above the article that is slightly floated by the support member, and the sub-frame on the main frame is placed at both ends of the article. It is arranged further outside. In addition, the distance between the pair of hanging arms in each subframe is made larger than the width of the article.

In addition, although the sub-frame moves on the main frame and the hanging arm moves on the sub-frame, the positions of the fulcrum members on each of the hanging arms fluctuate. Since the elastic lifting force is always applied by the slack removing device, the slinging member is maintained in a state of being stretched between the fulcrum members on which the slinging member is hung.

Next, the whole is lowered in the above state, and the non-bend back chain and the slinging member passed between each pair of the hanging arms are arranged below the lower surface of the article. In this state, the pair of sub-frames are moved closer to each other along the main frame, and the chain and the slinging member are arranged below both ends of the article. Further, if necessary, the depending arms are brought closer together and placed near both sides of the article. When the whole is lifted by a crane or the like in this state, the article is supported and lifted on a non-bend back chain which is not bent by a load from above in a substantially original arrangement state.

The article thus lifted is transferred together with the article lifting device to another place or above a rack or the like, and is lowered onto the support member in the original or almost initially placed state.

After unloading the article, the pair of hanging arms are separated from each other as needed to separate the article, and then the pair of sub-arms are removed until the non-bend back chain and the slinging member come out of the article from below. Separate the frames from each other and prepare for the next operation.

The article suspended by the non-bend back chain,
When placed on the inner floor of a space with side walls and the like around it, such as a vehicle carrier, when the hanging arm or non-bend back chain is too large to be in the way, or when loading articles on a vehicle etc. When placing via a support member close to or lower than the height of the non-bend back chain, the article suspended by the non-bend back chain is temporarily suspended on the support member of the temporary storage place, and in that state, A fulcrum member is arranged at a second position, and the slewing member is removed from the fulcrum member, and then the hanging arm and the non-bend back chain escape outward from under the article while the slewing member remains under the article. Let it. In this state, by raising the main frame again, the article is lifted only by the sling member connected to the main frame. At this time, the slinging member is pulled down and stretched by the gravity of the article against the lifting force of the slack removing device.

After hanging the article thus lifted to a predetermined position, the sling member is removed from under the article. The sling member removed from the article in this way is again stretched over the fulcrum member in preparation for the next operation.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows the front of the article lifting device, and FIG. 2 shows one side of the device.

This article lifting device includes a main frame 1 extending in a first direction X, and a pair of sub-frames 2 and 2 provided on the frame.

The main frame 1 is provided with a pair of suspenders 11, 11 connected to a crane hook F by a wire W at the center thereof.

Each sub-frame 2 includes a frame 21 extending in a direction Y perpendicular to the first direction X and a frame 22 rising at the center of the frame 21. The rising frame 22 has four rotatable rollers 23 inside its upper end.

Two of the four rollers 23 are the main frame 1
And rolls along a laterally extending shelf on the side surface (the side surface shown in FIG. 1). The remaining two rollers 23 are the main frame 1
And can roll along a laterally overhanging shelf on that side. Thus, the sub-frames 2 can approach and separate from each other in the first direction X along the main frame 1.

The main frame 1 has driving means 3 for each sub-frame 2.
Is provided.

Each driving means 3 includes chain sprockets 31 and 32 rotatably provided in the main frame 1, a chain 33 wound around these sprockets, both ends of which are connected to the subframe rising portion 22, and an electric motor supported on the lower surface of the main frame. It comprises a motor 34 and a chain transmission 35 for transmitting the power of the motor to the sprocket 31. In each driving means 3, the chain 33 also moves in the forward (reverse) direction by the forward (reverse) operation of the motor, whereby the pair of sub-frames 2, 2 are driven to approach and separate.

A pair of hanging arms 4 is supported on a portion 21 of each subframe 2 extending in the Y direction perpendicular to the X direction. The arms 4 are slidably supported by the frame 21 so that they can approach and separate from each other along the Y-direction frame 21.

Further, each sub-frame 2 is provided with driving means 5 for driving the hanging arms 4, 4 so as to approach and separate from each other.

As can be seen from FIGS. 3 and 4, the driving means 5
A shaft 51 rotatably supported in the Y-direction frame 21 of the sub-frame 2, an electric motor 53 supported by the sub-frame 2, and a chain transmission 52 for transmitting the power of the motor to the shaft 51 are provided. The shaft 51 is provided with a right male screw 51a on one side and a left male screw 51b on the other side from the center. A right female screw portion 41a is provided at the upper end of one arm 4 and a left female screw portion 41b is provided at the upper end of the other arm 4. These female screw portions are provided at the male screw portions 51a and 51b, respectively. It is screwed.

Therefore, when the motor 53 in the driving device 5 rotates forward or reverse, the shaft 51 also rotates forward or reverse accordingly,
The pair of hanging arms 4, 4 operate to approach or move away from each other.

The article lifting device further includes a non-bend back chain 6 extended to each pair of hanging arms 4.

The non-bend back chain is a chain that can be bent only in one direction from a straightly extended state and cannot be bent in the opposite direction, and has a structure known per se. In this embodiment, a non-bend back chain having a structure as shown in FIG. 5 is employed. In the chain shown in FIG. 5, for example, when a load is applied downward from above and below section B while section A is sandwiched from above and below, the chain links of the chain cannot collide with each other and cannot be bent. Can be easily bent. Both ends of such a chain 6 are inserted into lower arms 4, 4 from the lower ends thereof. Chain support guide means 7 is provided at the lower end of each arm 4. Said means 7
Consists of upper and lower members 71 and 72 which can guide the chain so as to be able to enter and exit the arm 4 while bending the chain, and can also support the chain at the lower end of the arm from above and below and cantileverly support the chain.

The upper member 71 has an arcuate chain contact surface so that the chain 6 can bend and run, and the lower member 72 has a flat upper surface for receiving the chain.

In each of the hanging arms 4, a chain 8 as a bendable connecting member is connected to an end of the chain 6,
The chain 8 is guided by a guide sprocket 9 provided at the upper end of the hanging arm 4 to be moved in the Y-direction frame 21 of the sub-frame.
To the end of, and are connected there.

Therefore, when the pair of hanging arms 4 and 4 approach each other, both ends of the non-bend back chain 6
Enters, rises and is stored there. In this case, the guide sprocket 9 also moves together with the inside of the arm 4, so that the connecting member 8 does not loosen.

When the pair of arms 4 and 4 are separated from each other, the chain 6 goes out from the lower end of the arm 4. Accordingly, the non-bend back chain 6 always maintains a posture extending horizontally or almost horizontally between the lower ends of the pair of arms 4 and 4.

The apparatus of this embodiment also has two slinging ropes 20, 20, as shown in FIGS. Each rope 20 is at the height of the non-bend back chain 6 (in this example,
It is a rope with a diameter much smaller than about 50 mm)
1 and auxiliary parts 202, 202 connected to both ends thereof via hooks 203, 203. Auxiliary part 20 of each rope 20
2, 202 The upper end is suspended and connected to the main frame 1. In this example, the total length of each rope 20 is sufficiently longer than twice the height of the hanging arm 4.

Further, each rope 20 is suspended and connected to the slack removing device 30 on the main frame 1 via the hooks 203, 203, and the slinging portion 201 is provided with a corresponding pair of hanging arms 4,
4 It can be bridged over fulcrum members 40, 40 provided on the inner surface of the lower end.

The slack removing device 30 includes a pair of spring balancers 301, 301 suspended and connected to the main frame 1, and a wire 302 coming out of each balancer is connected to the hook 203. The wire 302 is constantly applied with a force of a winding spring (not shown) in the balancer 301 in a direction in which the wire 302 is wound into the balancer, and thereby, a rope wrapped around the fulcrum members 40, 40 at the lower end of the hanging arm. The sling part 201 is stretched along the non-bend back chain 6. Sling part 201
Are located between the upper and lower surface heights of the chain 6 in such a stretched state.

Each of the fulcrum members 40 is formed of an L-shaped rod, and is rotatably supported by a hanging arm.
A first position for hanging the slinging part 201, that is, a position a in which the bent tip part 401 faces downward, or a second position in which the hanging sled part 201 is removed, that is, a position in which the bent tip part 401 faces the other fulcrum member. b can be taken.

As shown in FIG. 3, the driving device 50 is provided on each of the hanging arms 4 and includes a spring (not shown) for constantly applying a force for rotating the member 40 from the first position to the second position, 4 rotatably supported at the upper end, and one end 501a
The lever 501 protrudes between the arms 4 and 4 and the other end 5 of the lever.
01b and a wire 502 connecting the member 40, usually, the member 40 is arranged at the first position by the gravity of the free end of the lever 501, and the lever end 501a is rotated upward by receiving an external force from below, When the wire 502 is loosened, the member 40 is arranged at the second position by the spring (not shown).

Next, a description will be given of a case where a plurality of bars 10 as shown by two-dot chain lines in FIGS. 1 and 2 are lifted or lowered from the suspended state to a fixed position by the article lifting device.

In the illustrated example, there are four bars 10 and they are supported by supporting members 101, 101 commonly called ringing, or slightly raised by supporting members in a rack (not shown).

First, initially, the slinging portion 201 of each rope 20 is stretched over a pair of fulcrum members 40, 40 at the lower end of the corresponding hanging arm, and is stretched by the slack removing device 30.

In order to lift the plurality of bars 10, as shown in FIG. 1, a pair of sub-frames 2, 2 are arranged at both ends of the main frame 1 by driving means 3, 3, and the main frame 1 is operated by a crane. As shown in FIG.
10 and a non-bend back chain 6 and a rope slinging portion 20 at the lower end of each pair of hanging arms.
The overall position of the article lifting device is adjusted so that 1 is disposed below the lower surface of the bar 10.

Next, the pair of sub-frames 2 and 2 are brought close to each other by the action of the driving means 3 and 3 so that each of the non-bend back chains 6 and the rope slinging section 201 are positioned below the end of the bar 10 as shown by a two-dot chain line in FIG. To the side.

Thereafter, as shown by a two-dot chain line in FIG. 2, the pair of hanging arms 4, 4 in each subframe are brought closer to each other as necessary, and the chain 6 passed between the arms 4, 4 is moved.
The bar 10 is set to the minimum length necessary for lifting. The approach operation of the pair of arms 4 in each sub-frame 2 can be performed by the arm driving means 5 as described above.

In adjusting the positions of the sub-frames 2 and 2 on the main frame 1 and the positions of the hanging arms 4 and 4 on each sub-frame 2, the position of the fulcrum member 40 on each hanging arm also fluctuates. The rope slinging portion 201 wrapped around the member, the rope 20 is always
Since it is elastically pulled upward at, the stretched state is maintained.

In this state, when the crane is operated to lift the entire article lifting device upward, both ends of the bar 10 are picked up by the non-bend back chains 6, 6, and the arrangement of the bar 10 is adjusted to the non-bend state. Since the bend back chain does not bend, the initial state is maintained. Therefore, there is no danger that the initial arrangement state of the bar 10 collapses to cause load collapse, or that the arrangement state collapses such that the left and right sides are narrow and the top and bottom are high in FIG. The bar 10 thus lifted
Is suspended on a support member prepared in another place or on a rack as it is.

After the bar 10 is suspended at the predetermined position in this manner, the paired arms 4, 4 are separated from each other as necessary, and the pair of sub-frames 2, 2 are separated from each other, so that the non-bend back chain 6 , 6 and rope slinging section 20
1, 201 is removed from the lower side of the bar 10. Thus, the article suspending device is raised again to prepare for the next operation.

When the articles hung by the non-bend back chains 6 and 6 are placed on the floor in a space having side walls and the like around the vehicle carrier or the like, when the hanging arm 4 or the non-bend back chain 6 is too large to be in the way. In addition, when loading articles on a vehicle or the like, when placing the articles via a support member close to or lower than the height of the non-bend back chain 6 for safety, the non-bend back chains 6, 6
Is temporarily suspended on the support member of the temporary storage place. In this case, use a sufficiently high support member,
After the article is placed on the support member, the entire apparatus is still lowered, whereby the lever end portion 501a of the fulcrum member driving device 50, 50 is pushed up from below by the article. As a result, each fulcrum member 40 assumes the second position by the action of a spring (not shown), and the sling 201 is released.

Thereafter, the non-bend back chains 6, 6 are caused to escape from the bottom of the article to the outside while leaving the sling portions 201, 201 under the article. In this state, by raising the main frame 1 again, the article W is lifted only by the ropes 20 and 20 connected to the main frame 1 as shown by a two-dot chain line in the lower part of FIG. At this time, the ropes 20, 20 are pulled down and stretched by the gravity of the article against the lifting force of the slack removing device 30.

After hanging the article thus lifted to a predetermined position, the ropes 20, 20 are removed from under the article. The ropes 20, 20 thus detached from the articles are again stretched around the fulcrum members 40, 40 in preparation for the next operation.

As described above, according to the above embodiment, the slinging process on the article can be performed safely without relying on humans.

The present invention is not limited to the above embodiments, but can be implemented in various other modes. For example, when the length of the wire 302 is sufficient in the slack removing device 30, each spring balancer 301 may be fixed to the frame 1, and the wire may be guided by a pulley provided on the frame. Further, instead of such a device, a device in which a weight is connected to the rope 20 via a rope or the like provided on the pulley provided on the frame 1 or a device in which a tension spring is connected to the rope 20 may be used.

Further, as the fulcrum member, a pin which can be protruded and retracted from the lower end side surface of the hanging arm 4 is employed, and as a driving means thereof, a spring which always projects the pin and a solenoid which retreats the pin against the spring are used. May be employed.

〔The invention's effect〕

ADVANTAGE OF THE INVENTION According to this invention, the article lifting apparatus which can perform the slinging process with respect to articles | goods, such as a bar material and a pipe | tube material, safely without manual operation can be provided.

[Brief description of the drawings]

1 is an overall front view, FIG. 2 is a side view, and FIG. 3 is a cross-sectional view of a part for explaining a pair of hanging arms, a driving device thereof, and a state in which a non-bend back chain enters and exits the arm. FIG. 4 is a partial cross-sectional view of the sub-frame, the hanging arm, and the peripheral portion thereof when viewed from the front side.
FIG. 5 is a side view of the non-bend back chain. DESCRIPTION OF SYMBOLS 1 ... Main frame 2 ... Sub-frame 4 ... Hanging arm 6 ... Non-bend back chain 7 ... Chain support and guide means 8 ... Connecting member 9 ... Guide sprocket 20 ... Rope 201 ... Sling section 202 ... … Auxiliary part 203… Hook 30… Loosening device 301… Spring balancer 302… Wire 40… Support member a… First position b… Second position 50 Drive device

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masayuki Nakazaki 3, Kashima-cho, Kashima-gun, Ibaraki Prefecture Inside Kashima Works, Sumitomo Metal Industries Co., Ltd. 15 (56) References JP-A-60-252584 (JP, A) JP-A-59-162581 (JP, U) JP-A-54-105469 (JP, U) Patent 2550180 (JP, B2)

Claims (1)

(57) [Claims] 1. A main frame, a pair of sub-frames provided on the main frame so as to be able to approach and separate from each other in a first direction along the main frame, and a pair of sub-frames in a second direction crossing the first direction. A pair of hanging arms provided on each of the sub-frames so as to be able to approach and separate from each other, a non-bend back chain which is passed between the hanging arms of each pair and which enters and exits the arms as the pair of arms approach and separates, A bendable connecting member for connecting the end of each chain to a fixed position of the sub-frame, and supporting the chain so that it does not bend even if it receives a load from above, and allowing the chain to enter and exit the hanging arm. Chain support and guide means provided on each of the hanging arms for guiding, and contacting the connecting member so as to prevent the connecting member from loosening. A guide member on the hanging arm, a sling member disposed on each of the sub-frames and having a smaller diameter than the non-bend back chain, with both ends connected to the main frame between the pair of sub-frames; A fulcrum member provided at the lower end of each hanging arm for bridging each slinging member between a pair of lowering arms on the subframe along the non-bend back chain, and hanging on the fulcrum member. A slack removing device provided on the main frame for applying an elastic lifting force to the sling member so that the sling member to be passed is stretched between the fulcrum members; and a first position for removing the fulcrum member from the fulcrum member. A fulcrum member driving device provided on the hanging arm for being disposed at the second position. Apparatus.