JPH04272088A - Clamping type hanger tool - Google Patents

Abstract

PURPOSE:To contrive space saving by ensuring a minimum space only required where a chuck arm can be safey lifted in no relation to a degree of chuck dimension between rows, when a workpiece is piled up in a plurality of rows in multiple steps, in the case of a clamping hanger tool by which the block- shaped workpiece can be chucked and unchucked by repeating lift operation in a hanging up condition. CONSTITUTION:Upper/lower part hanging frames 1, 2 are connected by an up/down guide mechanism 3 and a gravitational force detect circulating interframe variable connecting mechanism 11. Arm main parts 51, 51, 51, 51 of almost reverse L shape of a pair of clamping arms 5, 5 are inserted so as to pass each other in tubular horizontal guides 21, 21, 21, 21 provided in the lower part hanging frame 2. Three members of the upper/lower hanging frames 1, 2 and the clamping arm 5 are connected by a link mechanism 6 to open/close the clamping arms 5, 5 by swiveling the link mechanism 6 according to relatively approaching and contour moving of the upper/lower part hanging frames 1, 2.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is capable of expanding and contracting the chuck dimensions of a pair of clamping arms by repeatedly moving up and down in a suspended state, and can be used for concrete drainage basins, U-shaped drainage blocks, retaining walls of national highways and rivers. This invention relates to a clamping type hanger that can chuck and unchuck a block or other block-shaped heavy workpiece, and thereby handle it.

0002

2. Description of the Related Art A conventional clamping tool of this type is disclosed in, for example, Japanese Utility Model Publication No. 16935/1983. Further, as related technology, there is Japanese Utility Model Publication No. 57-6462.

0003

[Problem to be solved by the invention] Utility Model Publication No. 57-6462
The device dimensions in the clamping direction are constant regardless of the size of the chuck, so when lifting block-shaped heavy objects with small chuck dimensions and stacking them in multiple rows or tiers,
The slide rod that protrudes outward from the chuck gets in the way,
Large gaps had to be left between the rows, and a large stockyard was required. Utility Model Publication No. 57-6462 cannot directly clamp a block-like heavy object. In addition, Publication of Utility Model No. 57-6462 and Publication of Utility Model No. 57-6462 relate to a gravity-sensing type variable-length interframe connection mechanism, which may cause malfunctions if subjected to vibrations or hung diagonally. I was worried about sex.

The present invention has been devised in view of the above-mentioned points, and the device dimensions in the clamping direction change in accordance with the size of the chuck, and block-shaped heavy objects are lifted and stacked in multiple rows and stages. The purpose of the present invention is to provide a clamping type hanger that can realize a significant space saving compared to the conventional one by simply securing the minimum gap between the rows in which the chuck claws can move up and down safely.

[0005]

[Means for Solving the Problems] In the present invention, an upper suspension frame 1 and a lower suspension frame 2 are engaged with each other so as to be able to approach and separate in the vertical direction by a vertical guide mechanism 3, and a variable connection between frames of a gravity sensing circulation type is provided. A work w connected by a mechanism 4 and located below the lower hanging frame 2
A pair of clamping arms 5, 5 that clamp the upper suspension frame 1, the lower suspension frame 2, and the pair of clamping arms 5, 5 are engaged with and guided by the lower suspension frame 2 so as to be able to move toward and away from the lower suspension frame 2 in the horizontal direction. A link mechanism 6 for opening and closing the required clamping arm, which is provided to link the three parts, swings as the upper suspension frame 1 and lower suspension frame 2 move closer to each other and move away from each other, so that the above-mentioned pair of The frame-to-frame variable coupling mechanism 4 allows the engagement member 4b to circulate when the upper suspension frame 1 and the lower suspension frame 2 alternately approach and separate from each other. In the clamping type suspension device configured to circulate through the guide passage 4c and engage and lock when the upper suspension frame 1 and the lower suspension frame 2 approach each other as required to maintain the connection length small, the pair of clamping arms 5, 5 is all
It has a plurality of arm main parts 51, 51 spaced apart from each other by a predetermined distance, each having a substantially inverted L-shape in shape when viewed from a direction perpendicular to the clamping direction, and the plurality of arm main parts 51, 51 are connected to upper and lower cross beam members. A chuck pad 54 is attached to the lower cross beam member 53 which is integrally connected by 52 and 53, and the horizontal part 51a of the arm main part 51 of one clamping arm 5 and the horizontal part of the arm main part 51 of the other clamping arm 5. 51a are a plurality of rectangular cylindrical horizontal guides 21 provided on the lower hanging frame 2 so as to pass each other;
21, 21, 21, a clamp type hanger is provided which is characterized by being inserted through and guided by a corresponding cylindrical guide.

[0006]

[Operation] The upper hanging frame 1 and the lower hanging frame 2 are brought close to each other as required, and the engaging member 4b of the inter-frame variable connection mechanism 4
If the upper suspension frame 1 is to be kept in a state where it is engaged and locked in the circulation guide passage 4c and the connection length is kept small, and the upper suspension frame 1 is to be lifted by a lifting machine such as a crane using a wire, the pair of clamping arms 5, 5 are The link mechanism 6 lifts the lower suspension frame 2 in the unzipped state, and the weight of the lower suspension frame 2 is carried by the upper suspension frame 1 via the frame-to-frame variable connection mechanism 4. When the clamping type lifting tool is lowered onto the workpiece w so that the pair of clamping arms 5, 5 are suspended on both sides of the workpiece w, and the lower suspension frame 2 is placed on the workpiece w, the frame The engagement lock of the engagement member 4b of the variable coupling mechanism 4 with respect to the circulation guide passage 4c is released, and the upper suspension frame 1 and the lower suspension frame 2 are brought into the closest position. Next, when the clamping type lifting tool is lifted, the inter-frame variable connection mechanism 4 is in the disengaged state, so at the initial stage of lifting, the upper hanging frame 1 is separated from the lower hanging frame 2, and this As the link mechanism 6 swings, the pair of clamping arms 5, 5 narrow the distance between them, and the chuck pad 54 comes into contact with the side surface of the workpiece, and the moment amplification action of the linkage mechanism 6 causes the workpiece w to be chucked. When the chuck is performed, the separation movement of the upper suspension frame 1 with respect to the lower suspension frame 2 is stopped, and the work w is lifted. The lifting load is applied when the horizontal part 51a of the arm main part 51 penetrates the rectangular cylindrical horizontal guide 21.
Since it is guided, it is transmitted from the clamping arm 5 to the lower suspension frame 2, and further transmitted from the lower suspension frame 2 to the upper suspension frame 1 via the link mechanism 6, and then to the upper suspension frame 1 via the inter-frame variable connection mechanism 4. It will never be conveyed. Then, if you hang the clamping type hanger at another desired position and continue to hang it even when the work w touches the ground, the upper hanging frame 1 will come close to the lower hanging frame 2. Due to the swinging of the link mechanism 6 operating at this time, the pair of clamping arms 5, 5 widen the distance between them and release the chuck on the workpiece w. When the clamping type lifting tool is lifted again, the engaging member 4b of the frame-to-frame variable coupling mechanism 4 engages and locks the circulation guide passage 4c to maintain the connection length small, and the link mechanism 6 connects the pair of clamping arms. 5, 5 remain open at a wide interval corresponding to the unzipped state.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the clamping type hanger of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 3, in this clamping type hanging tool, an upper hanging frame 1 and a lower hanging frame 2 are engaged with each other so as to be able to approach and separate in the vertical direction by a vertical guide mechanism 3, and a gravity sensing circulation type. A pair of clamping arms 5, 5 that are connected by a variable inter-frame coupling mechanism 4 and clamp a workpiece w positioned below the lower hanging frame 2.
is engaged with and guided by the lower suspension frame 2 so as to be able to approach and separate from it in the horizontal direction, and the upper suspension frame 1 and the lower suspension frame 2
A link mechanism 6 for opening and closing the required clamping arms is provided to link the pair of clamping arms 5, 5.
The pair of clamping arms 5, 5 can be opened and closed by swinging as the upper suspension frame 1 and lower suspension frame 2 move toward and away from each other.

The upper suspension frame 1 has two horizontal members 1a and 1b made of channel steel as main components, and a cylinder core provided with the horizontal members 1a and 1b at three positions, at both ends and in the center, is vertically arranged. Outer cylinders 3a and 4a made of elongated rectangular cylinders
, 3a are welded and fixed to these so as to sandwich them, and is elongated in a direction perpendicular to the chuck direction. The central part of the horizontal rectangular tube 1c extending in the horizontal direction different from the cross members 1a, 1b by 90 degrees is connected by a connecting mechanism 1d, and furthermore, the horizontal rectangular tubes 1c, 1c on the left and right outside of the cross members 1a, 1b are connected to each other by a connecting mechanism 1d. Hanging fittings 1e with eyes in four corresponding locations,
1e, 1e, 1e are fixed by welding. The upper hanging frame 1 is lifted by inserting the fork claws F of a forklift into the two horizontal rectangular tubes 1c, 1c (Fig. 6).
), wire ropes are slung over the four hooked hanging fittings 1e, 1e, 1e, 1e and lifted up using a lifting machine such as a crane (Fig. 9). As shown in FIG. 8, the coupling mechanism 1d includes a box-shaped housing 101 provided between the cross members 1a and 1b, in which a rubber plate 102 is housed, and a square bracket 103 provided from a horizontal square tube 1c is housed. A pin 104 is inserted into a pin hole (not shown) drilled in the housing 101 and a long hole (not shown) drilled in the square bracket 103, and the horizontal square tube 1c is moved vertically by several mm.
The horizontal square tube 1c is pivoted with play in the housing 1.
01, the rubber plate 102 serves as a cushion.

As shown in FIG. 7, the lower hanging frame 2 includes four cylindrical horizontal guides 21, 21, which are made up of four rectangular tubes, two on each side, two of which are closely aligned on one side.
21, 21 and inner cylindrical horizontal guides 21, 21 on both sides.
A vertical tube 24 supported by brackets 23, 23 consisting of two square tubes that integrally connect the center portion between the cross beams 22, 22 and a vertical tube 24
and a workpiece abutment rod 25 which is housed in the vertical tube 24 from the lower end and is extendable and retractable downward by adjusting the pin connection position. And outer cylindrical horizontal guides 21, 21 on both sides.
Inner cylinders 3b, 3b made of rectangular cylinders with vertically extending cylinder cores fixed upright at the center of the upper surface are slidably fitted into outer cylinders 3a, 3a provided from the upper suspension frame 1. The outer cylinders 3a, 3a and the inner cylinders 3b, 3b constitute a vertical guide mechanism 3 that mutually guides the upper suspension frame 1 and the lower suspension frame 2 vertically.

As shown in FIG. 10, the gravity sensing circulation type inter-frame variable coupling mechanism 4 includes an outer cylinder 4a, a cam 4d forming a circulation guide passage 4c provided inside the outer cylinder 4a,
4e, and a vertical cylinder 2 whose upper part is housed in the outer cylinder 4a from below.
4, a hook 4b which is an engaging member provided from the upper end of the hook 4b;
It has a spring 4f that biases the hook 4b to one side. The circulation guide passage 4c includes a bent portion 4c' and a stepped portion 4 for preventing reverse circulation.
The frame-to-frame variable connection mechanism 4 is configured such that when the upper suspension frame 1 and the lower suspension frame 2 alternately approach and separate from each other, the hook 4b connects to the circulation guide passage. can be circulated through the circulation guide passage by the joint action of the guiding action of the spring 4c and the biasing action of the spring 4f;
In addition, when the upper suspension frame 1 and the lower suspension frame 2 are located at the concave bent portion 4c' of the circulation guide passage 4c when the upper suspension frame 1 and the lower suspension frame 2 are approaching each other as required, and when attempting to separate the upper suspension frame 1 and the lower suspension frame 2 from each other, the upper suspension frame 1 and the lower suspension frame 2 are located at the bent portion 4c'. It is a gravity-sensing circulation type mechanism that can be engaged and locked to keep the connection length small. More specifically, in the frame-to-frame variable coupling mechanism 4, the hook 4b is attached to a recessed bent portion of the circulation guide passage 4c.
When the vertical cylinder 24 is lowered relative to the outer cylinder 4a at position c' (when the upper suspension frame 1 is lifted)
, the hook 4b engages and locks the bent portion 4c' to shorten the connection length and keep the upper hanging frame 1 and the lower hanging frame 2 close to each other. Therefore, the weight of the lower suspension frame 2 is carried by the upper suspension frame 1 via the inter-frame variable coupling mechanism 4. When the vertical tube 24 rises relative to the outer tube 4a (even after the lower suspension frame 2 stops lowering due to contact with the ground or being placed on the workpiece w, the upper suspension frame 1 is lifted up and supported and lowered). When the operation is continued by a slight stroke), the hook 4b moves in the direction of the arrow a while being biased to one side by the bias of the spring 4f. Next, when the vertical tube 24 descends relative to the outer tube 4a again, the hook 4b descends in the direction of arrow b to lengthen the connection length to ensure separation of the upper suspension frame 1 and the lower suspension frame 2. However, at this time, the weight of the lower suspension frame 2 is not carried by the upper suspension frame 1 via the inter-frame variable connection mechanism 4, but is carried by the upper suspension frame 1 via the link mechanism 6. Subsequently, when the vertical cylinder 24 rises again relative to the outer cylinder 4a (when lowering it), the hook 4b abuts against the reverse circulation prevention step 4c'' and the circulation guide path is moved as shown by arrow c. 4c, and the vertical tube 24
When it descends relative to the outer cylinder 4a again, it moves in the direction of arrow d, and the hook 4b is positioned again at the bent portion 4c'. In this manner, the hook 4b detects gravity and moves in a circular manner to alternately engage and disengage, thereby varying the connection length. In addition, the gravity-sensing circulation type inter-frame variable connection mechanism 4
As a result, the reliability of operation will be lower than that of this embodiment, but the mechanism shown in drawings 6 and 7 of Publication of Utility Model Publication No. 57-6482 or the mechanism shown in Figures 6 and 7 of Publication of Utility Model Publication No. 55-169.
This does not preclude the adoption of the mechanism shown in FIG. 2 of Publication No. 35.

The pair of clamping arms 5, 5 each have a hollow substantially inverted L shape when viewed from a direction perpendicular to the clamping direction.
It has a plurality of arm main parts 51, 51 in the shape of a letter, separated by a required interval, and the plurality of arm main parts 51, 51 are connected to a cross member 52 on the same length between the arm main parts 51, 51. A chuck pad 5 made of urethane rubber is integrally welded with a lower cross member 53 that extends in a direction perpendicular to the chuck direction than the main parts 51, 51.
4 is attached, and the arm main part 5 of one clamping arm 5, 5 is attached.
A plurality of cylindrical horizontal guides 2 are provided on the lower hanging frame 2 so that the horizontal portions 51a of the first and second gripping arms 5 and the horizontal portions 51a of the arm main portions 51 and 51 of the other clamping arms 5 and 5 pass each other.
1, 21, 21, 21, corresponding cylindrical horizontal guide 2
1 (Fig. 5, Fig. 7).

As shown in FIG. 4, the clamping arm opening/closing link mechanism 6 connects the clamping arm 5 on one side so as to link the upper suspension frame 1, the lower suspension frame 2, and the clamping arm 5. It consists of a total of four sets including two sets of a swing link 6a, a swing fulcrum bracket 6b, a lifting bracket 6c, and an adjustment link 6d, and the bent portion of the swing link 6a can swing around the swing fulcrum bracket 6b as a fulcrum. , a lifting bracket 6c connected with a pin to a long hole bored at the end of a horizontal portion 6a' of a swing link 6a passed in the chuck direction between the upper suspension frame 1 and the lower suspension frame 2 is attached to the horizontal The end of the section 6a' is raised, and the swing link 6a
A hanging portion 6a'' of the lower suspension frame 2 is connected by a pin 6e to an adjustment link 6d which is lowered to one side of the lower suspension frame 2 and linked to the cross beam member 52 on the clamping arm 5.Adjustment link 6d
The pin holes 6d' are opened at appropriate pitches, extend parallel to the horizontal part 51a of the arm main part 51, and are passed through the slits 26 opened in the crossbeam 22 of the lower suspension frame 2. and the lower hanging frame 2 are suspended. Therefore, the link mechanism 6 causes the pair of clamping arms 5, 5 to approach each other when the upper suspension frame 1 and lower suspension frame 2 are separated, and also causes the pair of clamping arms 5, 5 to approach each other when the upper suspension frame 1 and lower suspension frame 2 approach each other. 5,5 may be spaced apart. Then, by passing the link pin 6e through the pin hole 6d' selected as desired in the adjustment link 6d, the chuck dimensions (dimension between the chuck pads) of the pair of clamping arms 5, 5 are made to correspond to the chucked dimensions of the workpiece. obtain.

Next, the operation of the embodiment having the above configuration will be explained. The clamping type hanger of this embodiment is shown in Fig. 9.
The work w is chucked and chucked in the operating order of ■-■-■-■-■. In the state (2) shown in FIG. 10, the upper suspension frame 1 and the lower suspension frame 2 are brought close to each other as required, and the engagement member 4b of the inter-frame variable coupling mechanism 4 engages and locks with the bent portion 4c' of the circulation guide passage 4c, resulting in the connection length being extended. The pair of clamping arms 5, 5 are opened to the unzipped state by the clamping arm opening/closing link mechanism 6, and the upper suspension frame 1 is lifted by a wire using a lifting machine such as a crane. A pair of clamping arms 5
, 5 are lowered onto the workpiece w so as to hang down on both sides of the workpiece w, which is a block-shaped heavy object. (2) shows a state in which the lower hanging frame 2 is placed on the workpiece w, and in FIG. is released, and the upper suspension frame 1 and the lower suspension frame 2 are closest to each other, which is the position shown by the solid line. ① means that when the clamping type lifting tool is lifted, the inter-frame variable connection mechanism 4 is in the disengaged state, so at the beginning of lifting, the upper hanging frame 1 is separated from the lower hanging frame 2; Due to the swinging of the link mechanism 6 operating at this time,
The distance between the pair of clamping arms 5, 5 is narrowed, and the chuck pad 54 comes into contact with the side surface of the workpiece, thereby chucking the workpiece w. In (2), the chuck is performed and the separation movement of the upper suspension frame 1 with respect to the lower suspension frame 2 is stopped;
This is the state in which the work w has been lifted. Since the horizontal portion 51a of the main arm portion 51 is inserted into and guided by the rectangular cylindrical horizontal guide 21, the lifting load is transmitted from the clamping arm 5 to the lower suspension frame 2, and further from the lower suspension frame 2 to the link mechanism 6. is transmitted to the upper suspension frame 1 via. (2) shows the chucked state at the moment when the workpiece w touches the ground after the clamping hanger is lowered at another desired position. (2) is a state in which the wire is still slightly loosened due to continued hanging. At this time, the upper suspension frame 1 approaches the lower suspension frame 2, and due to the swinging of the link mechanism 6 operating at this time, the pair of clamping arms 5
, 5 widen the interval and release the chuck on the work w. (2) is the engaging member 4b of the frame-to-frame variable coupling mechanism 4 in FIG.
engages and locks into the circulation guide passage 4c to keep the connection length small, and the pair of clamping arms 5, 5 remain open to a wide distance corresponding to the chuck release state by the link mechanism 6.

In order to chuck workpieces w of different sizes, it is necessary to change the link point of the link mechanism 6 with respect to the clamping arm 5, and to do so, the link pin 6e is removed and another required pin hole 6d' of the adjustment link 6d is moved. The pair of clamping arms 5, 5 are set so that the widened dimension between the chuck pads is larger than the workpiece dimension, and the narrowed width dimension between the chuckpads is smaller than the workpiece dimension. As a result, when the chuck size is large, the horizontal portion 51a of the arm main portion 51 of the clamping arm 5 moves out of the rectangular cylindrical horizontal guide 21.
1. In this case, the arm main parts 5 on both sides
Since the horizontal portions 51a, 51a of No. 1 and 51 move past each other, a large chuck size can be ensured. Further, when the chuck size is small, the horizontal portion 51a of the arm main portion 51 is adjusted with respect to the rectangular cylindrical horizontal guide 21 in a direction in which it is deeply fitted into the rectangular cylindrical horizontal guide 21. In this case, structurally,
The size of the upper suspension frame 1 and the lower suspension frame 2 in the chuck direction is smaller than the minimum chuck dimension, and the upper suspension frame 1 and the lower suspension frame 2 protrude outward in the chuck direction than the clamping arm 5. Never. The required minimum width of the stock space in the chuck direction is the width of the pair of clamping arms 5, 5, regardless of the size of the chuck.
It is sufficient if it can be ensured that the outer dimension of the arm is slightly larger than the outer dimension of the arm when the chuck is released.

[0015]

As explained above, according to the clamping type lifting device of the present invention, the dimensions of the device in the clamping direction change according to the size of the chuck, and it is possible to lift block-shaped heavy objects.
When stacking multiple rows or tiers, it is sufficient to ensure a minimum gap between the rows that allows the chuck arm to move up and down safely, regardless of the size of the chuck, resulting in significant space savings compared to conventional methods.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view of a clamp-type hanger according to an embodiment of the present invention.

FIG. 2 is a plan view of FIG. 1.

FIG. 3 is a side view of FIG. 1.

FIG. 4 is a cross-sectional view taken along IV-IV in FIG. 1;

FIG. 5 is a cross-sectional view taken along line V-V in FIG. 1.

FIG. 6 is a sectional view taken along line VI-VI in FIG. 1, showing a state where the device is lifted up by a forklift.

FIG. 7 is a plan view in FIG. 1.

FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. 1;

FIG. 9 is an operation process diagram.

FIG. 10 is an enlarged sectional view of main parts.

[Explanation of symbols]

w Workpiece 1 Upper hanging frame 2 Lower hanging frame 21 Cylindrical horizontal guide 3 Vertical guide mechanism 4 Inter-frame variable connection mechanism 4a Engagement member 4b Circulation guide passage 5 Holding arm 51 Arm main part 51a Horizontal part 52 Cross beam member 53 Cross beam Material 54 Chuck pad 6 Link mechanism

Claims (1)

[Scope of Claims] [Claim 1] An upper suspension frame and a lower suspension frame are engaged with each other so as to be able to approach and separate in the vertical direction by a vertical guide mechanism, and are connected by a gravity-sensing circulation type frame-to-frame variable connection mechanism, A pair of clamping arms that clamp a workpiece positioned below the lower suspension frame are engaged with and guided by the lower suspension frame so as to be able to approach and separate from the lower suspension frame in the horizontal direction, and the upper suspension frame, the lower suspension frame, and the pair of A required link mechanism for opening and closing the clamping arm, which is provided to link the three clamping arms, swings as the upper suspension frame and the lower suspension frame move toward each other relative to each other. The inter-frame variable connection mechanism is configured to be able to open and close the clamping arm of the frame, and when the upper suspension frame and the lower suspension frame alternately approach and separate from each other, The engaged member circulates through a circulation guide path provided from the other of the hanging frame or the lower hanging frame, and is engaged and locked when the upper hanging frame and the lower hanging frame approach each other as required, thereby maintaining the connection length small. In the configured clamping type hanger, each of the pair of clamping arms has a plurality of arm main parts spaced apart from each other by a predetermined distance, each of which has a substantially inverted L-shape when viewed from a direction perpendicular to the clamping direction; The plurality of arm main parts are integrally connected by upper and lower cross beam members, and a chuck pad is attached to the lower cross member, and the horizontal part of the arm main part of one clamping arm and the arm main part of the other clamping arm are connected together. A clamping type suspension tool, characterized in that the horizontal portions of the horizontal portions are inserted into and guided by corresponding rectangular cylindrical horizontal guides among a plurality of cylindrical guides provided on the lower suspension frame so as to pass each other. 2. The inter-frame variable coupling mechanism is a hook in which the engaging member is biased to one side by a spring,
When the upper suspension frame and the lower suspension frame are alternately approached and separated from each other, the hook can circulate through the circulation guide passage through the joint action of the guiding action of the circulation guide passage and the biasing action of a spring, and When the upper suspension frame and the lower suspension frame approach each other as required, if the upper suspension frame and the lower suspension frame are located at a concave bend in the circulation guide passage and attempt to separate the upper suspension frame and the lower suspension frame relative to each other, the upper suspension frame and the lower suspension frame are engaged and locked at the bend to reduce the connection length. The clamp-type hanger according to claim 1, characterized in that it is configured to be kept small.