JP2502168Y2 - Heavy load transfer device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a moving device for heavy objects which has a small width dimension and can be used even in a narrow place.

[Conventional technology]

A conventional moving device for heavy objects is, for example, one shown in FIG. This moving device 1 is installed on the jack receiving beam 2 and tries to hoist the lower heavy object W by a push jack 4 via a PC screw steel rod 3 as a hoisting material (or a tensioning material). . As a configuration, the cylinder 4a of the push jack 4 is attached to the lower beam 5, and the upper end of the piston 4b is attached to the upper beam 6. A pair of screw steel rods 3 penetrates the jack receiving beam 2 and the lower beam 5 and the upper beam 6 installed thereon. Reference numeral 7 is a lower fixing nut, and 8 is an upper fixing nut, both of which are screwed into the threaded steel rod 3. Reference numeral 9 is a joint coupler for adding or detaching one threaded steel rod 3 having a length of 4 to 6 m.

Now, as shown in FIG. 8, when the apparatus 1 is stopped (see FIG. 8A), the lower fixing nut 7 is fixed to the lower beam 5 to prevent the screw steel rod 3 from falling. . Further, since the push jack 4 is in the returning state and no hydraulic pressure is applied to the hydraulic hose P ₁ , its height is the lowest.
(P ₁ and P ₂ are hydraulic hoses, and the hydraulic pressure acts alternately. When the hydraulic pressure is applied to the cylinder 4 via P ₁ , the piston 4 b is pushed out, and when the hydraulic pressure is applied to P ₂ , the piston 4 b is inside the cylinder 4. Next, when the screw steel rod 3 is fixed to the upper beam 6 by the upper fixing nut 8, the hydraulic pressure is applied to the push jack 4 when the screw steel rod 3 is raised (see FIG. 2B). When actuated and the piston 4b is pushed out, the screw steel rod 3
Is pulled up with the upper beam 6. Further, at this time, in order to prevent the screw steel rod 3 from dropping due to a failure of the jack 4 and to carry out the next lifting, the lower fixing nut 7 raised together with the screw steel rod 3 is immediately fastened to the lower beam 5. Next, when returning the stroke of the push jack 4 (see FIG. 6C),
Although the upper beam 6 is also lowered together with the piston 4b and the height of the jack 4 is minimized, the upper fixing nut 8 is still raised together with the threaded steel rod 3, so it is lowered and tightened to the upper beam 6. . This returns to the initial state shown in FIG. 8 (a), and the threaded steel rod 3 corresponds to one stroke of the jack 4,
It has risen. By repeating the stroke of the jack 4 in this manner, a heavy object is lifted to a predetermined height.

[Problems to be solved by the device]

However, in the moving device as described above, the cylinder end of the push jack is attached to the lower beam, and the fixing nut of the threaded steel rod must be attached to the outside of the cylinder end. The length and area of the upper beams need to be large enough to attach them.
Therefore, the width of the entire device becomes large, and a space margin for installing the device is required, so that there is a problem that the use is limited at a construction site where many members are present in a complicated manner. In addition, since the fixing nut must always be tightened manually or automatically during the ascent, the operation becomes complicated. Furthermore, since the length of the threaded steel rod is limited to a certain length, it is necessary to add or remove it depending on the lift, and the hanging material (tensile material) is not flexible like PC cables. However, there was a problem that the load could not be slanted.

The present invention has been made in view of such a conventional problem, and an object thereof is to solve the above problems by providing a fixed pressure support plate on the piston side of the jack.

[Means for solving the problem]

In order to solve the above-mentioned object, this invention uses a plurality of steel wires as tension members, and in a device for moving a heavy object by a single jack, a fixed pressure plate for supporting the jack is provided on the piston side of the jack, Guide members are provided on both sides of the fixed pressure support plate in parallel with the operation direction of the jack, and sliding pressure plates that are guided and moved by the guide member according to the advance / retreat of the piston are provided at the cylinder side end of the jack. The steel wire penetrates the fixed pressure bearing plate and the sliding pressure bearing plate and is arranged on the outer peripheral portion of the jack in parallel with the operating direction of the jack, and at the penetration position of each steel wire of the fixed pressure bearing plate and the sliding pressure bearing plate, The heavy weight moving device is provided with a fixing mechanism having conical holes for sandwiching and fixing a penetrating steel wire and locking pieces on opposite sides of the heavy weight.

[Action]

Since this invention is configured as described above, since the fixed pressure bearing plate is provided on the piston side of the jack, the outer diameter of the cylinder and the piston diameter are smaller than those when the fixed pressure bearing plate (lower beam) is provided on the cylinder side. The fixing mechanism and the sliding bearing plate can be made small by narrowing the interval between the plurality of steel wires provided in parallel with the fixing mechanism corresponding to the difference. Therefore, the width of the moving device is remarkably smaller than that of the conventional example, and it can be used in a narrow place in many cases.

〔Example〕

The invention will be described below with reference to the drawings. Fig. 1 ~
FIG. 6 is a diagram showing an embodiment according to the present invention.

FIG. 1 is a schematic view of an embodiment in which a heavy object W is hoisted in the vertical direction, and shows an example in which the device 10 is installed on the strong beam 2 at the work site. is there. Second
(A), (b), (c), (d) is sectional drawing which shows the AA cross section, BB cross section, CC cross section, and DD cross section in FIG. 1, respectively.

First, the structure will be described. 13 is the cylinder side of the jack,
Reference numeral 14 indicates a piston of this jack. The tip of the piston 14 is formed into a spherical surface, and the device 10 is installed on the beam 2.
It comes into contact with a spherical seat 15a provided at the center of the fixed pressure bearing plate 15. Guide bars 17 as guide members are provided on both sides of the fixed pressure support plate 15, and guide plates 20 are fixed to the upper ends thereof. Reference numeral 16 is a slide bearing plate attached to the cylinder side end surface of the jack, which can slide up and down in the guide bar 17 according to the advance and retreat of the piston 14 (Fig. 2 (b)). . S ₁ and S ₂ are steel wires (strands) arranged in parallel along the outer periphery of the jack 13 as a set of two, each of which penetrates the fixed bearing plate 15 and the sliding bearing plate 16. At the same time, it penetrates through the fixing mechanisms 18 and 19 provided on both bearing plates, and the lower end is hooked on the heavy object W.

The fixing mechanism 19 is provided on the fixed pressure support plate 19 so as to surround the spherical seat 15a (FIG. 2 (d)), and the fixing mechanism 18 is attached to the sliding pressure support plate 16 at the same intervals. (Fig. 2 (b)). These fixing mechanisms are all third
As shown in the drawing as a cross-sectional view, it has the same structure, and a through hole 18b (19b) of the strand S and a conical hole 18c (19c) continuous with the through hole 18b (19b) are formed in the center of the main body 18a (or 19a). In the conical hole 18c, a hooking piece 21 obtained by dividing a cone into a plurality of pieces is inserted around the strand S in a free state. When the strand S is raised, the hooking piece 21 has a hooking piece 21 of the main body 18a (1
9a) is a disc-shaped pressing plate that prevents it from protruding from the main body 18a and bolts 23
It is installed in. Further, the hooking piece 21 cannot restrain the strand S when the strand S moves relatively upward with respect to the main body 18a (19a), and clamps the strand S when the strand S relatively moves downward. Conical hole 18
Since it falls into c, the frictional hooking force of the hooking piece 21 against the strand S increases according to the magnitude of the downward pulling force of the strand S, and the hooking piece 21 brakes the strand S to move it. To stop.

FIG. 4 shows an example in which the fixing mechanisms 18 and 19 are integrally formed with a fixed pressure bearing plate or a sliding pressure bearing plate, and FIG. 4A shows a cross section thereof. As shown in FIG. 4 (b), the pressing plate 24 is formed in an annular shape having an outer diameter substantially the same as that of the bearing plate 15, but the operation is the same as the above-mentioned configuration.

Also, in this embodiment, the strands S are S ₁ and S ₁ , S ₂ and S
_{Although two} sets are made as shown in FIG. 2 (FIG. 2 (c)), the present invention does not limit the number of steel wires (strands) forming one set to two.

Further, the feature of the above configuration is that since the fixed pressure plate 19 receives the piston 14 of the jack, the distance between the strands S ₁ and S ₂ can be reduced to the outer diameter of the cylinder 13, and the moving device 10 The width can be made significantly smaller than that of the conventional example.

 Next, the lifting operation will be described.

Initially, the jack should be unloaded and its overall length minimized. Next, when hydraulic pressure is supplied to the pressure port of this jack, the piston 14 is pushed out, so that the sliding pressure plate is pushed.
16 is guided by the guide bar 17 and tries to rise. The relationship between the fixing mechanism 18 on the sliding pressure support plate 16 and the strand S at this time is that the strand S is pulled downward relative to the main body 18a, as already described in detail in FIG. Thereby, the strand S is gripped by the hooking piece 21. On the other hand, in the fixing mechanism 19 of the fixed pressure support plate 15,
In FIG. 3, since the strand S is in a rising state, it is in a free state with respect to the hooking piece 21 and is not hooked. Therefore, the strand S is held by the fixing mechanism 18 while holding the heavy object W, and moves up by one stroke of the jack.
The jack operates for one stroke and then stops, and when the hydraulic pressure is switched to the piston return side of the cylinder 13, the piston 14 starts returning. At this time, the strand S suspends the heavy object W in the fixing mechanism 19 and is pulled downward so that it is braked and grasped by the hooking piece 21.

On the other hand, in the fixing mechanism 18 of the sliding pressure support plate 16, only the main body 18a descends in FIG. 3, so that the strand S has a relatively rising relationship, and the strand S is the hooking piece 21.
Be free to. Therefore, the heavy object W maintains the position where it is lifted by one stroke of the jack, and the jack is initially in an unloaded state, and its total length is minimized. Then, when the jack again supplies the hydraulic pressure to the side for pushing out the piston, the heavy object W is further raised by one stroke in the same manner as described above.

By repeating the above operation, the heavy object W can be lifted to the required height.

FIG. 5 and FIG. 6 are schematic views showing an embodiment in the case of horizontally pulling a heavy object, and the same parts as those in the above-mentioned embodiment are designated by the same reference numerals, and the duplicated description thereof will be omitted.

In this moving device, as the pressure bearing plates 15 and 16 in the above-described embodiment, the one shown in FIG. 4 in which the fixing mechanism is integrally configured is used. A member corresponding to a fixed pressure plate is referred to as an anchor head 25, a member corresponding to a sliding pressure plate is referred to as a pooling head 26, and a fixing mechanism is referred to as grippers 19 and 18.

FIG. 5 is a diagram showing a situation in which the pushing side of the jack is pressed to extend the piston 14, the gripper 18 of the pooling head 26 grips the cable (strand) S, and the heavy object W is moved rightward in the figure by one stroke. Is. At this time, the lower gripper 19 does not hook the cable S.

FIG. 6 shows the piston when the return side of the jack is pressed next.
When the length of 14 is reduced, the lower gripper 19 is connected to the cable S
, The upper gripper 18 does not hook the cable S, and at this time, the heavy object stops moving.

 The subsequent operation is the same as that of the above-mentioned embodiment.

[Effect of device]

As described above, according to the present invention, since the fixed pressure bearing plate is provided on the piston side, as compared with the case where the fixed pressure bearing plate is provided on the cylinder side, the fixing mechanism is provided on the inner side by the amount that the piston diameter is smaller than the cylinder diameter. The fixed pressure plate and the sliding pressure plate can be made smaller by narrowing the interval between the plurality of steel wires arranged in parallel with each other. Therefore, the width of the moving device can be reduced, and the moving device can be used even in a narrow place. Furthermore, since there is no need to add or remove tension members (suspension members) as in the conventional example, there is an advantage that the work is greatly simplified.

[Brief description of drawings]

FIG. 1 is a schematic diagram of an embodiment in the case of lifting a heavy object in the vertical direction, and FIGS. 2 (a), (b), (c), and (d) are A-A cross sections and B in FIG. 1, respectively. -B cross section, CC cross section, D-
D sectional view, FIG. 3 is a sectional view of the fixing mechanism, FIG. 4 (a) is a sectional view of a member in which the fixing mechanism and a pressure plate are integrally formed, and FIG. 4 (b) is the same figure (a). FIG. 5, FIG. 6 and FIG. 6 are schematic diagrams of the embodiment of the moving device for horizontal pulling and explanation of the action, FIG. 7 is a schematic diagram of a conventional example, and FIGS. 8 (a), 8 (b), ( c)
FIG. 6 is a diagram showing a work order of a conventional example. S: Steel wire (strand, cable), W: Heavy object,
3,13 …… Jack, cylinder side, 14 …… Piston, 5,15
...... Fixed pressure plate, 6,16 …… Sliding pressure plate, 7,17 …… Guide member (guide bar), 8,18,9,19 …… Fixing mechanism, gripper.

Claims (1)

(57) [Scope of utility model registration request] 1. A device for moving a heavy object by a single jack, using a plurality of steel wires as tension members, wherein a fixed pressure plate for supporting the jack is provided on the piston side of the jack. Guide members are provided on both sides parallel to the operating direction of the jack, and at the cylinder side end of the jack there is a slide pressure plate that is guided and moved by the guide member according to the advance and retreat of the piston. The pressure plate and the sliding pressure bearing plate are penetrated and are arranged on the outer peripheral portion of the jack in parallel with the operation direction of the jack. And a fixing device having a conical hole for holding and fixing a penetrating steel wire and a locking piece on the opposite side.