JPS628512Y2 - - Google Patents

Description

[Detailed description of the invention] "Field of industrial application" This invention relates to crane test weights used in crane load tests.

"Conventional technology" Recently, with the rationalization of work, more and more business establishments are installing cranes, and safety management in terms of handling and maintenance has become more important. is required.

During these inspections and inspections, a load test is performed in which a constant load is applied to the crane using pre-measured weights.

When performing such a load test, it is preferable that a single weight be hung on the crane to meet the specified load. However, in reality, there are many different types of cranes, and the test load itself Since there are various types of weights, it is extremely rare to be able to conduct a test using a single weight.

Therefore, the test is carried out by combining multiple weights to create a weight suitable for the test load, and suspending these weights from the hook of a crane. Until now, no particular consideration has been given to the ease of handling when using multiple weights in combination (I can't find any literature), and for this reason, multiple weights have to be individually attached to the crane hook. Countermeasures have been taken, such as tying ropes to the area.

``The problem that the invention aims to solve'' However, with this approach, the ropes attached to each weight may rub against each other, causing damage to the ropes, or the ropes may be hung on each weight one by one. There are problems such as the work requires a lot of labor, and the need to prepare ropes of various lengths in advance to match the size of each weight, making it difficult to handle safety and workability. Efforts to improve this were eagerly awaited.

In addition, test weights are not normally used but are used only during testing, so they must be transported from the storage location to the testing location, and therefore consideration should be given to ease of transportation.

This idea was made in view of the above circumstances,
The purpose of this is that by simply stacking multiple weights, they can be engaged with each other so that they can be handled like a single weight, making it easier to hang ropes, and reducing the burden on the ropes. In addition, it can be easily and stably transported using a forklift, thereby significantly improving safety and workability during handling, and facilitating transportation. The purpose of the present invention is to provide a test weight for a crane, which enables the load test of a crane to be carried out smoothly.

"Means for solving problems" The crane test weight according to this invention is
This is a weight that is hung by a rope from the hook of the crane for load testing of the crane.The weight is approximately plate-shaped as a whole, and by varying the height dimension in the thickness direction of the weight, it is possible to measure the load on the crane. Several types of test weights with different weights were obtained, and each test weight had a convex portion formed in the center of its upper surface for engaging with the bottom of the other test weight, while At the center of the bottom surface, a ground plane is formed that slightly protrudes from the surrounding area, and at the center of this ground plane, a recess is formed to engage the convex part of another test weight, and the ground plane around this recess is formed. Two fork grooves are provided in parallel to each other, sandwiching the recessed portion, and penetrating to both ends of the ground plane, and a hanging part is formed protruding from the two opposing sides, and the hanging part of the hanging part is A rope hanging groove is formed in the base end, which is approximately U-shaped from the lower surface to both side surfaces, and has a curved chamfered corner portion extending from the lower surface to the side surfaces of the hanging portion.

"Function" The test weight according to the present invention has a generally plate-like shape as a whole, and several types of test weights with different weights can be obtained by simply changing the dimension in the height direction. By suitably combining several different types of test weights, it is possible to create a weight that matches the test load of the crane.Moreover, each test weight has a convex portion on its top surface and a convex portion on its bottom surface. Since each test weight is provided with a recess that engages with the protrusion of the test weight, if the combined test weights are stacked one after the other with the same orientation, the test weights that are in close contact with each other will have a recess that engages with the protrusion and recess. are engaged with each other to prevent the weights from slipping between each other.

In addition, during the work of stacking each test weight, it is conceivable that the worker may press the outer periphery of the test weight with his hand to adjust the position when lowering the test weight stacked on top.
Each test weight has a ground plane at the center of its bottom that protrudes from its surroundings, and a gap is formed between the stacked test weights at the periphery by the length of the protruding ground plane. Accidents such as getting your fingers caught on the bottom edge are also prevented, and test weights can be stacked safely and accurately.

After stacking multiple test weights as described above, you can hang multiple test weights by hanging a wire rope through the rope hanging groove formed on the hanging part of the lowest test weight. It can be lifted in a stable manner as if handling a single test weight, and by hanging the wire rope on the hook of a crane, a predetermined test load can be applied to the crane.

In this case, the work of hanging the wire rope in the rope hanging groove is extremely easy because it is only necessary to pass the wire rope under the hanging part and shift it toward the proximal end of the hanging part.

In addition, when each weight is stacked and lifted, the vertically extending portions of the rope hanging grooves of each weight (the portions formed on both sides of the base end of the lifting part) are aligned in a straight line with each other. The wire ropes enter these linearly aligned grooves, and each hanging part is held in place by the tension applied to the wire ropes, so the stacked weights simply form the above-mentioned protrusions and recesses. Not only does the engagement of the wire ropes prevent displacement, but the tension of the wire ropes also prevents mutual displacement and holds the wire firmly, preventing tilting and providing stability during lifting. This greatly improves operability and safety.

In addition, the rope hanging groove has a U-shape with curved chamfered corners extending from the lower surface to the side surface of the hanging part, and the wire rope hangs in the groove in a smoothly curved state, so that the wire rope hangs smoothly. There is less strain on the wire ropes, and damage and damage to the wire ropes can be prevented.Moreover, multiple weights can be hung at once, which reduces the number of wire ropes used and eliminates inconveniences such as wire ropes rubbing against each other. It can also be avoided.

In addition, when transporting each test weight from the storage location to the testing location, a forklift can be used because a fork groove is provided, and when the weights are stacked on top of each other, the above-mentioned protrusions and depressions can be removed. Since mutual slippage is prevented by engagement with the test weights, multiple test weights can be stacked and transported at once. It becomes possible to transport it in a stable condition.

"Example" Hereinafter, an example of the test weight according to this invention will be described based on FIGS. 1 to 3.

The test weight according to this invention is one in which a plurality of weights are simply stacked and engaged with each other so that they can be handled like a single weight. For simplicity, it is generally plate-shaped as a whole.

In addition, several types of test weights with different weights are combined to create the desired weight corresponding to the test load, but in this case, the various test weights with different weights are placed at a height in the thickness direction. The shapes of the parts related to mutual engagement of weights and rope hanging are the same except for the different dimensions, so the shape of each part will be explained using one example.

In FIGS. 1 to 3, the reference numeral 1 indicates a test weight of one embodiment.

The test weight 1 of this embodiment has a substantially rectangular parallelepiped shape by selecting a substantially rectangular shape in plan view. Alternatively, the shape of the portion involved in rope hanging may be a predetermined shape described later, and the shape in plan view is of course not limited to this one embodiment.

This test weight 1 is integrally formed of cast iron, and has a truncated quadrangular pyramid-shaped convex portion 3 formed in the center of its upper surface 2.

This convex part 3 is a part of the test weight 1 placed on top of another test weight 1 when stacked on top of it.
This is to prevent mutual misalignment by engaging the bottom of the

On the other hand, the center of the bottom surface 4a of the test weight 1 is slightly larger than the bottom surface 4a (a little larger than the thickness of a finger).
A protruding ground plane 4b is formed, and a recess 5 is formed in the center of this ground plane 4b.

This recess 5 is for engaging with the protrusion 3, and has a similar shape to the protrusion 3 and is slightly larger in size.

In the ground planes 4b on both sides of the recess 5, there are fork grooves 8, 8 for inserting two mutually parallel lift forks that penetrate from the front surface 6 toward the rear surface 7, when viewed from the front surface 6. They are placed symmetrically.

Furthermore, hanging parts 9 and 10 are formed in the center of the front surface 6 and the center of the rear surface 7 to project forward and backward, respectively.

The upper end surfaces 11, 12 of the suspension parts 9, 10 are on the same plane as the upper surface 2, and the lower end surfaces 13, 14 of the suspension parts 9, 10 are located above the bottom surface 4a. In addition, these hanging parts 9, 10 protruding in the front and rear
Rope hanging grooves 18, 18 each having a semi-circular cross-section are formed at the base end of each of the ropes so as to form a substantially U-shape from the lower surface to both side surfaces of the base end.

The left and right corners 20 on the bottom surface 4a side of these rope hanging grooves 18 are chamfered into curved surfaces. A rope damage prevention slope 21 formed into one continuous curved surface is provided near the intersection with the extension line of the rope.

Note that, as described above, by changing the height dimension of the test weight 1, test weights having different weights can be obtained.

A case in which a load test is performed using the crane test weight 1 having the structure as described above will be explained based on FIG. 4.

Four test weights 1a, 1 with different weights
By appropriately combining multiple weights from among b, 1c, and 1d, the total weight is made equal to the test load of the crane, and each test weight 1a, 1
B, 1c, and 1d are stacked in order with the orientation aligned and the weight decreasing toward the top.
Then, the protrusions 3 and recesses 5 of the test weights that are in close contact with each other engage with each other, and slipping between them is prevented.

In addition, during the work of stacking each test weight, it is conceivable that the worker may press the outer periphery of the test weight with his hand to adjust the position when lowering the test weight stacked on top.
Each of the test weights in the above embodiments has a bottom surface 4a.
Since the central ground plane 4b is formed to protrude beyond the width of a finger, a gap is formed at the periphery of the stacked test weights by the length of the protruding length of the ground plane 4b. Accidents such as pinching fingers are also prevented, and test weights can be stacked safely and accurately.

After stacking a plurality of test weights as described above, the wire ropes 22 can be hung in the rope hanging grooves 18 formed in the hanging parts 9 and 10 of the lowest test weight 1a. It is possible to lift several test weights in a stable state as if handling a single test weight, and by hanging the wire rope 22 on the crane hook, a predetermined test load can be applied to the crane. .

In the above-mentioned embodiment, since the lower end surfaces 13 and 14 of the hanging parts 9 and 10 are located above the bottom surface 4a, the lowest test weight 1a is placed directly on the flat ground. Even if the lifting parts 9 and 10 have a lower end surface and the ground, a gap is ensured, and the wire rope 22 can be easily hung from this gap into the rope hanging groove 18 provided at the base end. I can do it. In addition, in this case, the rope hanging groove 18
The work of hanging the wire rope 22 is to pass the wire rope 22 under the hanging parts 9 and 10,
This is extremely easy since it is only necessary to shift the hanging parts 9, 10 toward the base ends.

Furthermore, when the weights are stacked and lifted, the vertically extending portions of the rope hanging grooves 18 in each weight (the portions formed on both sides of the proximal ends of the lifting parts 9 and 10) are aligned with each other in a straight line. The positions of the stacked weights are aligned, and the wire ropes 22 enter the grooves aligned in a straight line, and the respective hanging parts 9 and 10 are held in place by the tension applied to the wire ropes 22, so that the stacked weights are , the displacement is not only prevented simply by the engagement between the convex portion 3 and the concave portion 5 described above, but also the wire rope 22
The tension prevents mutual displacement and holds firmly, preventing tilting and improving stability during lifting, improving operability.
Safety is greatly improved.

Further, the groove 18 has a semicircular cross section, and the corner portion 20 of the groove 18 and the vicinity where the groove 18 intersects with the upper end surface of the hanging parts 9 and 10 are formed in a curved shape. Since the wire rope 22 does not hit any angular parts, there is less stress on the wire rope 22, and it is possible to prevent the wire rope 22 from being damaged or damaged.Also, since the wire rope 22 can be hung all at once, the wire rope to be used By reducing the number of wire ropes, inconveniences such as mutual rubbing between wire ropes can be avoided.

Furthermore, in the above embodiment, the convex portion 3 and the concave portion 5
Because each has a truncated quadrangular pyramid shape, these engagements allow not only simple translational sliding but also
Rotational slippage in the horizontal plane is also prevented at the same time. However, the shapes of the convex portions 3 and the concave portions 5 are not limited to those in the embodiment described above, and other pyramidal shapes may also be considered. Moreover, since prevention of rotational slippage can also be achieved by the wire ropes 22 hung on each of the hanging parts 9 and 10, it is also possible to form the convex part 3 and the concave part 5 into a simple conical shape.

In addition, each test weight 1a, 1b, 1c, 1
d from the storage location to the testing location, a forklift can be used because the fork grooves 8, 8 are provided.Moreover, when the weights are stacked on each other, the above-mentioned convex portion 3 and concave portion 5 Since mutual slippage is prevented by engagement with the test weights, multiple test weights can be stacked and transported at once. It becomes possible to transport it in a stable condition.

"Effects of the invention" As explained above, the test weight according to the present invention has an almost plate-like shape as a whole, and there are several types of test weights that differ in weight just by changing the dimension in the height direction. By appropriately combining several types of test weights with different weights, it is possible to create a weight that matches the test load of the crane, and each test weight has a convex portion on its upper surface. and a concave part on the bottom that engages with the convex part of other test weights, so if the combined test weights are stacked one after the other with the same orientation, the test weights will be in close contact with each other. The convex portion and concave portion of the weights engage with each other to prevent the weights from slipping between each other.

In addition, during the work of stacking each test weight, it is conceivable that the worker may press the outer periphery of the test weight with his hand to adjust the position when lowering the test weight stacked on top.
Each test weight has a ground plane at the center of its bottom that protrudes from its surroundings, and a gap is formed between the stacked test weights at the periphery by the length of the protruding ground plane. Accidents such as getting your fingers caught on the bottom edge are also prevented, and test weights can be stacked safely and accurately.

After stacking multiple test weights as described above, you can hang multiple test weights by hanging a wire rope through the rope hanging groove formed on the hanging part of the lowest test weight. It can be lifted in a stable manner as if handling a single test weight, and by hanging the wire rope on the hook of a crane, a predetermined test load can be applied to the crane.

In this case, the work of hanging the wire rope in the rope hanging groove is extremely easy because it is only necessary to pass the wire rope under the hanging part and shift it toward the proximal end of the hanging part.

In addition, when each weight is stacked and lifted, the vertically extending portions of the rope hanging grooves of each weight (the portions formed on both sides of the base end of the lifting part) are aligned in a straight line with each other. The wire ropes enter these linearly aligned grooves, and each hanging part is held in place by the tension applied to the wire ropes, so the stacked weights simply form the above-mentioned protrusions and recesses. Not only does the engagement of the wire ropes prevent displacement, but the tension of the wire ropes also prevents mutual displacement and holds the wire firmly, preventing tilting and providing stability during lifting. This greatly improves operability and safety.

In addition, the rope hanging groove has a U-shape with curved chamfered corners extending from the lower surface to the side surface of the hanging part, and the wire rope hangs in the groove in a smoothly curved state, so that the wire rope hangs smoothly. There is less strain on the wire ropes, and damage and damage to the wire ropes can be prevented.Moreover, multiple weights can be hung at once, which reduces the number of wire ropes used and eliminates inconveniences such as wire ropes rubbing against each other. It can also be avoided.

In addition, when transporting each test weight from the storage location to the testing location, a forklift can be used because a fork groove is provided, and when the weights are stacked on top of each other, the above-mentioned protrusions and depressions can be removed. Since mutual slippage is prevented by engagement with the test weights, multiple test weights can be stacked and transported at once. It becomes possible to transport it in a stable condition.

[Brief explanation of the drawing]

Figures 1 to 4 show one embodiment of the present invention, in which Figure 1 is a plan view, Figure 2 is a front view, Figure 3 is a right side view, and Figure 4 is an explanatory diagram of a test weight stacked on top of another and hung from a crane. 1 ... Test weight, 1a, 1b, 1c, 1
d...test weight, 2...top surface, 3...convex portion, 4a...bottom surface, 4b...contact surface, 5...concave portion, 6...front surface, 7...rear surface, 8...fork groove, 9...suspension portion, 10...suspension portion, 18...rope hanging groove, 20...corner portion, 21...inclined portion to prevent rope damage.

Claims (1)

[Scope of utility model registration request] A test weight for a crane that is suspended by a rope from the hook of a crane for a load test of the crane, which is approximately plate-shaped as a whole and has a height dimension in the thickness direction of the crane that is different. , several types of test weights with different weights to be loaded on the crane were obtained, and each test weight had a convexity in the center of its top surface for engaging with the bottom of the other test weights. On the other hand, a ground plane is formed in the center of the bottom surface that protrudes slightly from the surrounding area, and a recess is formed in the center of this ground plane to engage with the convex part of the other test weight. 2 on the ground plane around the recess
Book fork grooves are provided between the recesses and parallel to each other and penetrating to both ends of the ground plane,
Furthermore, a hanging part is formed protruding from two opposing sides of the test weight, and the base end of the hanging part has a substantially U-shape extending from the lower surface to both sides. A test weight for a crane, characterized in that a rope hanging groove is formed with a curved chamfered corner section extending from the bottom surface to the side surface.