JP2550180B2 - Article lifting device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an article hoisting device for hoisting or hoisting a heavy object such as a rod or tube made of metal or the like to a predetermined position.

[Conventional technology]

Conventionally, this type of device is designed so that a bendable long support such as a wire is passed under the article such as a bar or a tube to be hoisted or hung, and the article can be hoisted. It is configured.

For example, Japanese Utility Model Publication No. 63-20701 teaches the following device. That is, two pairs of hanging arms for lifting articles are provided on the main horizontal beam that can be lifted and moved by hanging with a crane, etc., so that mutual spacing can be adjusted. A back chain is housed, and the chain in one of the hanging arms is extended from the lower end of the arm while being supported by a chain guide shoe provided at the lower end of the arm so as not to bend. Pass it under the article to be lifted, connect the tip of the chain thus extended to the lower end of the other hanging arm with a pin, and then release the chain guide shoe so that the chain can be bent downward. By lifting the pair of hanging arms, the article is lifted, moved, and lowered to the desired location, and then the To release the binding pin to accommodate pull back the chain.

In addition, Japanese Utility Model Laid-Open No. 63-154585 discloses that a pair of hanging arms for lifting articles are provided on a main frame that can be lifted and moved by a crane or the like so that mutual intervals can be adjusted. A flexible support member such as a rope or a chain is stretched over the section, the support member is passed under the article to be lifted, and in that state, the pair of hanging arms is lifted to lift and move the article. I teach you a device that can be lowered to the place. In each pair of hanging arms, the distance between the hanging arms is adjusted when hoisting the article. At that time, the length of the supporting member portion passed between the lower end portions of the arms is also a rope length that is stretched to prevent the portions from slackening. Adjusted by adjusting device.

[Problems to be Solved by the Invention]

However, according to the conventional device described in Japanese Utility Model Publication No. 63-20701, when the arranged article is lifted,
Due to the load of the article being applied to the non-bend back chain and the weight of the chain itself, the chain bends so as to project downward, and in the conventional device disclosed in Japanese Utility Model Laid-Open No. 63-154585, the rope is also used. Although the article support member portion between the hanging arms is always stretched by the length adjusting device, in reality, the article support member which is originally flexible is projected downward by receiving the load of the article to be lifted. Therefore, in any conventional device, the chain bends downward so that the article group receives the lifting force of the chain, rope, etc. from the initial arrangement state and the width is narrow and the height is narrow. The size of the product may be in a collapsed state such that the size of the product may become large or may easily occur, resulting in a load collapse. There is a problem that it is difficult to reproduce the arrangement.

Further, when hanging a group of articles that have been lifted up onto a rack, the group of articles can be easily placed on the rack in a state where the horizontal width is narrow and the height is high, and the vertical pitch of the rack is minimized for storage. There is a problem that it becomes difficult to improve the ability.

Further, the lower end of each hanging arm receives a large moment when the article is lifted and easily falls toward the article side, which may collide with the article and damage it.

Further, in the device described in the above Japanese Utility Model Publication No. 63-20701,
In the work of pin-connecting the tip of the chain to the other hanging arm through the non-bend back chain under the article, the chain connecting work is not always always reliable, and the lifting work is time-consuming. In addition, there is a need for a chain drive device for retracting and accommodating the chain in the hanging arm, which increases the weight of the entire device.

Therefore, the present invention is capable of hoisting a group of articles such as rods and pipes in the original arrangement state, and hoisting them to another place or an article support rack in the original arrangement state, and the work is conventionally performed. An object of the present invention is to provide a device for hoisting articles which is simpler, more reliable and safer than the device and is easy to handle.

[Means for solving the problem]

According to the above object, the present invention provides 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 that crosses the first direction. The pair of hanging arms provided on each of the sub-frames so as to be able to approach and separate from each other in the direction, and the bending prevention mutual contact portions of the adjacent chain links are directed downward, and are passed between the lower ends of the pair of hanging arms. A non-bend back chain that is arranged and is capable of moving in and out of the anti-hanging arm as the anti-hanging arm approaches and separates, and the non-bend back chains that are placed in each of the hanging arms and have their upper ends connected to the subframe provided with the hanging arm. And a lower end of the bendable arm connected to the end of the non-bend back chain, and the upper end of each of the hanging arms. The bendable connecting member is provided in contact with the bendable connecting member of the hanging arm, and moves with the hanging arm as the anti-hanging arm approaches and separates, while allowing the bendable connecting member to move in and out of the non-bend back chain. A slack prevention guide member that is stretched so as to prevent slack is provided, and each of the hanging arms has a lower end portion that horizontally extends the portion of the chain that extends into the space between the hanging arm and the pair of hanging arms. (EN) An article hoisting device characterized by comprising chain support guide means for sandwiching and supporting the chain from above and below to hold the chain in a straight line and guiding the chain in and out of the arm.

According to the article hoisting device of the present invention, a group of articles such as rods and tubes is hoisted as follows.

That is, the main frame hung by a crane or the like is arranged above the article group, and the subframes on the main frame are arranged further outside than both ends of the article group. Further, the distance between the pair of hanging arms in each subframe is set larger than the width of the article group. In this state, the whole is lowered and passed between each pair of hanging arms,
The non-bend back chain, which is held in a horizontal linear posture by the chain support guide means at the lower end of each arm, is arranged below the lower surface of the article group. In that state, the pair of sub-frames are brought close to each other along the main frame, and the chains are arranged below both ends of the article group. Further, if necessary, the hanging arms are brought closer to each other and are arranged near both sides of the article group. When the whole is hoisted with a crane etc. in this state, the article group of the non-bend back chain whose both ends are supported by the chain support guide means so as not to bend under the load from above while maintaining a straight posture It is supported and hoisted in the almost initially arranged state above.

The article group thus hung up is moved together with the article hoisting device to another place or above a rack or the like, and is dropped there in the initially arranged state or almost the originally arranged state.

After lowering the article group, the hanging arms of each pair are separated from each other so as to separate from the article group as needed, and then the pair of sub-subseries is released until the non-bend back chain is released from the lower side of the article group to the outside. The frames are separated from each other to prepare for the next work.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

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

The article lifting device includes a main frame 1 extending in the 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 the direction Y perpendicular to the first direction X and a frame 22 standing upright in the center of the frame 21. The rising frame 22 has four rotatable rollers 23 inside the upper end thereof.

Two of the four rollers 23 are the main frame 1
It is arranged on one side surface (side surface shown in FIG. 1) and rolls along a shelf portion that projects laterally of the side surface. The remaining two rollers 23 are the main frame 1
Is disposed on the other side surface of the side surface of the side surface of the side surface, and can roll along a shelf portion that laterally extends on the side surface. Thus, the subframes 2 can move toward and away from each other in the first direction X along the mainframe 1.

The drive means 3 of each sub-frame 2 is provided in the main frame 1.
Is provided.

Each drive means 3 is provided with a chain sprocket 31, 32 rotatably provided in the main frame 1, a chain 33 wound around these sprockets and having both ends connected to the sub-frame 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 is moved in the forward (reverse) direction by the normal rotation (reverse rotation) of the motor 34, whereby the pair of sub-frames 2, 2 are driven toward and away from each other.

A pair of hanging arms 4 and 4 is supported on a portion 21 of each subframe 2 extending in the Y direction which is perpendicular to the X direction. Both arms 4 and 4 are slidably supported by the frame 21 so that they can move toward and away 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 move toward and away from each other.

The driving means 5 is, as can be seen from FIGS. 3 and 4,
The sub-frame 2 includes a shaft 51 rotatably supported in the Y-direction frame 21, 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. A right male screw 51a is engraved on one side of the shaft 51 and a left male screw 51b is engraved on the opposite side of the shaft 51. A right female screw portion 41a is provided on the upper end portion of one arm 4, and a left female screw 41b is provided on the upper end portion of the other arm 4, and these female screw portions are screwed onto the male screw portions 51a and 51b, respectively. I am fit.

Therefore, when the motor 53 in the drive device 5 is rotated normally or reversely, the shaft 51 also rotates normally or reversely,
The pair of hanging arms 4 and 4 operate so as to approach or separate from each other.

The article lifting device further includes a non-bend back chain 6 passed over the pair of hanging arms 4, 4.

This non-bend back chain is a chain that can be bent only in one direction from a linearly extended state and cannot be bent in the opposite direction, and has a structure already known per se. In this embodiment, a non-bend back chain having a structure as shown in FIG. 5 is adopted. In the chain of FIG. 5, for example, when a load is applied from the top to the bottom on the B part while the A part is clamped from above and below, the chain links of the chain cannot collide with each other and cannot bend, but in the C direction. Can be bent easily. In such a chain 6, the bending preventing mutual abutting portions of the adjacent chain links are directed downward as shown in FIG. 5 and are arranged between the arms, and both ends thereof are lower ends of the pair of hanging arms 4 and 4. Part is inserted into the arm. Chain support guide means 7 is provided at the lower end of each arm 4. The means 7 is composed of upper and lower members 71, 72 that guide the chain so that it can be moved in and out of the arm 4 while being bent, and at the same time, can clamp the chain from above and below and cantilever it at the lower end of the arm. ing.

The upper member 71 has a chain contact surface formed in an arc surface so that the chain 61 can be bent and run, and the lower member 72 has a flat upper surface for receiving the chain.

A non-bend back chain 6 is attached to each hanging arm 4 in the Y-direction frame of the subframe 2 supporting the arm.
A bendable connecting member 8 for connecting to 21 is arranged.
The connecting member may be a rope or the like, but a chain 8 is adopted here. The lower end of the chain 8 is the hanging arm 4
The Y-direction frame 21 is connected to the end of the non-bend back chain 6 that is inserted inside and the upper end is the above-mentioned Y-direction frame 21.
Is connected to the end of.

A slack preventing guide member 9 for the chain 8 is provided on the upper part of each hanging arm 4. The slack prevention guide member 9
Is here a guide sprocket 9, said chain 8
The intermediate portion is wound around a part of the guide sprocket 9, and thus the sprocket 9 is provided on the hanging arm 4 so as to be in contact with the chain 8.

Therefore, when the pair of hanging arms 4 and 4 are brought close to each other, both ends of the non-bend back chain 6 are moved to the arms 4 and 4.
Enters the inside of the building, rises, and is stored there. At this time, as the arm 4 moves inward, the guide sprocket 9 also moves in the same direction, and the sprocket is kept in contact with the chain 8 so that the chain is stretched while preventing its slack. Move to guide. Therefore,
The chain 8 does not loosen.

When the pair of arms 4 and 4 are separated from each other, the non-band back chain 6 goes out from the lower end of the arm 4, but at this time, as the hanging arm 4 moves outward, the guide sprocket 9 also moves in the same direction. As a result, the chain 8 connecting the non-bend back chain 6 to the sub-frame 2 is guided and moved in the opposite direction to the above while maintaining the tensioned state in contact with the sprocket 9. Bend back chain 6 is arm 4
You can get out from the bottom edge. Since the non-bend backing 6 is supported from above and below by the members 71 and 72 constituting the chain support guide means at the lower end portions of the arms 4 and 4, respectively, the pair of arms 4 and 4 is always provided.
Maintain a horizontal or nearly horizontal stretch between the lower ends of the.

Next, a description will be given of a case where a plurality of bar members 10 as indicated by a two-dot chain line in FIGS. 1 and 2 are hoisted or lowered from the hoisted state to a fixed position by the article hoisting device.

In the illustrated example, there are four rods 10, which are supported in a slightly raised state by support members 101, 101 commonly referred to as ringgit or by a support member in a rack (not shown).

To suspend the plurality of bars 10, a pair of subframes 2 and 2 are arranged at both ends of the mainframe 1 by driving means 3 and 3 as shown in FIG. 1, and the mainframe 1 is operated by operating a crane. As shown in Fig. 1
The overall position of the article lifting device is adjusted so that the non-bend back chain 6 at the lower end of each pair of hanging arms is arranged above the lower surface of the bar 10 while being arranged above the lower part of the bar 10.

Then, the pair of sub-frames 2 and 2 are brought close to each other by the action of the driving means 3 and 3, and the respective non-bend back chains 6 are arranged below the ends of the bar 10 as shown by the chain double-dashed line in FIG.

Then, as shown by the chain double-dashed line in FIG. 2, the pair of hanging arms 4 and 4 in each subframe are brought closer to each other as necessary, and the chain 6 passed between the arms 4 and 4 is moved.
Set the length of to the minimum required to lift the bar 10. The approaching operation of the pair of arms 4, 4 in each sub-frame 2 can be performed by the arm driving means 5 as described above.

Now, when the crane is operated in such a state to lift the entire article lifting device upward, both ends of the bar 10 are scooped by the non-bend back chains 6, 6 and the bar 10 is placed in the non-bend state. Since the back chain does not bend, it is maintained in its original state. Further, there is no possibility that the arms 4 and 4 fall inward and collide with the bar.
Therefore, there is no possibility that the initial arrangement state of the bar member 10 collapses and the load collapses, or the arrangement state collapses so that the horizontal direction is narrow and the vertical direction is high in FIG. The rod 10 thus hung is hung as it is on a support member prepared in another place or on a rack.

After suspending the bar member 10 at a predetermined position in this manner, the paired arms 4, 4 are separated from each other as necessary, and the pair of subframes 2, 2 are separated from each other to form the non-bend back chain 6 , 6 from the bottom of the bar 10.
Thus, the article suspension device is lifted again to prepare for the next work.

According to the apparatus of the embodiment described above, no special chain drive device for feeding the non-bend back chain 6 out of the hanging arm 4 or pulling it back into the arm is required. It is easy to handle.

〔The invention's effect〕

According to the present invention, a group of articles such as rods and pipes can be hoisted in the initial arrangement state, and can be hung down to another place or an article support rack in the original arrangement state, and the work is conventionally performed. It is possible to provide an article lifting device cormorant that is simpler, more reliable, and safer than the device and is easy to handle.

[Brief description of drawings]

FIG. 1 is a front view of the whole, FIG. 2 is a side view, and FIG. 3 is a sectional view for explaining a pair of hanging arms, a drive device thereof, and a state of putting in and out of a non-bend back chain arm, and the like. The figure shows a partial cross-section of the sub-frame, the hanging arm and its peripheral portion when viewed from the front side, and FIG. 5 is a side view of the non-bend back chain. 1 ... Main frame 2 ... Sub frame 4 ... Suspending arm 6 ... Non-bend back chain 7 ... Chain support guide means 8 ... Connecting member 9 ... Guide sprocket

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Takeshi Ogawa Takeshi Ogawa No. 3 Hikari, Oshima, Kashima-machi, Kashima-gun, Ibaraki Pref. Sumitomo Metal Industries Co., Ltd. Kashima Steel Works (56) Reference JP 53-7066 (JP, A) JP 53-126663 (JP, A) JP 63-154585 (JP, U) JP 63 -20701 (JP, Y2)

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 to each other in a second direction crossing the first direction. A pair of hanging arms provided in each of the subframes so that they can approach and separate from each other, and bending prevention mutual contact portions of adjacent chain links are directed downward and are arranged between the lower ends of the pair of hanging arms. A non-bend back chain that can move in and out of the anti-hanging arm as the anti-hanging arm approaches and separates, and the non-bend back chains are arranged in each of the hanging arms, the upper end of which is connected to the subframe provided with the hanging arm and the lower end of which is connected. A bendable connecting member connected to an end of the non-bend back chain, which is inserted into the hanging arms, and the hanging arms above the hanging arms. Is provided in contact with the bendable connecting member, and moves with the hanging arm as the counter hanging arm approaches and separates, and prevents the bendable connecting member from loosening while allowing the non-bend back chain to move in and out. And a slack prevention guide member that is stretched to guide the
At the lower end portion of each hanging arm, the chain is sandwiched and supported from above and below in order to horizontally hold the portion of the chain that is passed in the space between the hanging arm and the hanging arm that forms a pair with the hanging arm. An article hoisting device, comprising: chain support guide means for guiding the movement of a chain into and out of the arm.