JP6958416B2 - Braking test device and braking test method - Google Patents

Description

The present invention relates to a braking test device and a braking test method.

Conventionally, a structure that moves on a rail fixed to the surface of various pedestals installed on the ground or indoors or outdoors (for example, the ceiling of a building) is fastened to the structure in order to prevent it from being moved by an external force. Braking force is generated by gripping the rail with a clamp to fix the structure. Since the braking force due to the clamp can be reduced due to wear of the member or the like, it becomes necessary to perform a braking test for evaluating the braking force due to the clamp. For example, a relatively large structure such as a crane or an unloader installed on a quay receives a relatively large external force by receiving wind. Therefore, there is a particular need to perform braking tests on relatively large structures.

For example, the braking test can be performed by using a device provided with a rod-shaped member capable of linearly moving in the extending direction and configured so that the rod-shaped member can be gripped by another member. For example, Patent Document 1 discloses a device including a slide shaft capable of reciprocating in the extending direction, and the slide shaft is configured to be pressed by a pad. When a braking test is performed using such a device, the braking test device becomes like the braking test device according to the comparative example described later. Specifically, a test rail is used as a rod-shaped member capable of linear motion, and the test rail is configured so that it can be gripped by a clamp subject to a braking test. As a result, depending on whether or not the test rail moves with respect to the clamp when a pressing force is applied to the test rail in the extending direction while the test rail is gripped by the clamp, the clamp is used. It can be determined whether or not the reference braking force is equal to or greater than the braking force corresponding to the pressing force.

Japanese Unexamined Patent Publication No. 58-34338

However, in the above braking test using a test rail capable of linear motion in the extending direction, it is difficult to bring the state around the clamp closer to the actual use state. For example, the braking test described above differs from the actual usage state in that the clamp is fastened to the high-rigidity base via the high-rigidity fastening portion. Further, for example, in the above braking test, the pressing force is applied to the test rail in the extending direction, which is different from the actual usage state. Further, for example, in the above braking test, the rail gripped by the clamp is a test rail, which is different from the actual usage state. Therefore, the upper limit of the braking force due to the clamp may differ between the above braking test and the actual usage state. Therefore, it may be difficult to accurately evaluate the braking force due to the clamp.

Therefore, the present invention has been made in view of the above problems, and an object of the present invention is a new and improved braking test device and braking capable of accurately evaluating the braking force due to the clamp. To provide a test method.

In order to solve the above problems, according to a certain viewpoint of the present invention, a rail, a structure moving on the rail, a clamp fastened to the structure, and a recess in a surface to which the rail is fixed are provided. Between the concave or convex convex portion, the pressing device that applies pressing force to the structure in the extending direction of the rail, and the side portion of the concave or convex portion and the pressing device. In a braking test for evaluating the braking force generated by gripping the rail by the clamp, the reaction force transmitting member for transmitting the reaction force of the pressing force to the concave portion or the convex portion is provided. Braking test equipment used is provided.

The braking test device may include a regulating member that regulates the fall of the reaction force transmitting member due to the reaction force of the pressing force.

Further, in order to solve the above problems, according to another viewpoint of the present invention, the rail, the structure moving on the rail, the clamp fastened to the structure, and the structure are described. A pressing device that applies a pressing force in the extending direction of the rail, and a reaction force transmitting member that is fixed to the rail and transmits the reaction force of the pressing force to the rail are provided, and the rail is gripped by the clamp. Provided is a braking test apparatus used for a braking test for evaluating the braking force generated thereby.

The braking test device may be provided between the pressing device and the structure, and may include a pressing pressure transmitting member that transmits the pressing force to the structure.

The pressing force transmitting member may be movable in the extending direction of the rail.

The braking test device may include a support member that movably supports the pressing force transmitting member in the extending direction of the rail.

The structure moves on a pair of rails arranged side by side at intervals, a clamp is provided for each of the pair of rails, and a pressing force transmitting member is provided between the pair of rails. An extending portion extending in the parallel direction of the rail and a protruding portion protruding from both ends of the extending portion toward the structure may be provided.

Further, in order to solve the above problems, according to another aspect of the present invention, between the concave portion recessed in the surface to which the rail is fixed or the side portion of the convex convex portion and the pressing device. By a preparatory step of providing a reaction force transmitting member for transmitting the reaction force of the pressing force applied by the pressing device to the concave portion or the convex portion to the structure moving on the rail, and a clamp fastened to the structure. A gripping step of gripping the rail with a predetermined gripping force, a pressing step of applying a reference pressing force to the structure in the extending direction of the rail by the pressing device, and gripping the rail by the clamp. Braking that evaluates the braking force, including a determination step of determining whether or not the braking force generated thereby is equal to or greater than the reference braking force according to whether or not the structure has moved on the rail. A braking test method for performing the test is provided.

Further, in order to solve the above problems, according to another viewpoint of the present invention, a reaction force transmitting member that transmits the reaction force of the pressing force applied by the pressing device to the structure moving on the rail to the rail is provided. A preparatory step of fixing to the rail, a gripping step of gripping the rail with a predetermined gripping force by a clamp fastened to the structure, and a reference in the extending direction of the rail with respect to the structure by the pressing device. The pressing step of applying the pressing force and whether or not the braking force generated by gripping the rail by the clamp is equal to or greater than the reference braking force, and whether or not the structure has moved on the rail. Provided is a braking test method for performing a braking test for evaluating the braking force, including a determination step for determining the braking force accordingly.

As described above, according to the present invention, it is possible to accurately evaluate the braking force due to the clamp.

It is a front view which shows an example of the schematic structure of the braking test apparatus which concerns on a comparative example. It is a front view which shows an example of the schematic structure of the braking test apparatus which concerns on 1st Embodiment of this invention. It is a top view which shows an example of the schematic structure of the braking test apparatus which concerns on the same embodiment. It is sectional drawing which shows an example of the internal structure of the clamp which concerns on the same embodiment. It is an enlarged front view which shows an example of the structure around the jack in the case where the braking test apparatus which concerns on this embodiment is further provided with a regulation member, a pressing force transmission member, and a support member. FIG. 5 is an enlarged front view showing an example of a configuration around a jack when the pressing force transmitting member shown in FIG. 5 is in sliding contact with a rail. It is a front view which shows an example of the schematic structure of the braking test apparatus which concerns on the 1st modification in the same embodiment. It is a top view which shows an example of the schematic structure of the braking test apparatus which concerns on the 1st modification in the same embodiment. It is a front view which shows an example of the schematic structure of the braking test apparatus which concerns on the 2nd modification in the same embodiment. It is a top view which shows an example of the schematic structure of the braking test apparatus which concerns on the 2nd modification in the same embodiment. It is a flowchart which shows an example of the process flow in the braking test method which performs the braking test using the braking test apparatus which concerns on the same embodiment. It is explanatory drawing for demonstrating the moment applied to the clamp in the braking test which concerns on the same embodiment. It is explanatory drawing for demonstrating the positional relationship between the braking surface of a clamp and a rail in the braking test which concerns on this embodiment. It is a top view which shows an example of the schematic structure of the braking test apparatus which concerns on 1st application example. It is an enlarged front view which shows an example of the structure around the jack in the braking test apparatus which concerns on 1st application example. It is a front view which shows an example of the schematic structure of the braking test apparatus which concerns on 2nd Embodiment of this invention. It is a top view which shows an example of the schematic structure of the braking test apparatus which concerns on the same embodiment. It is explanatory drawing for demonstrating another example of the method of fixing a reaction force transmission member to a rail. It is an enlarged front view which shows an example of the structure around the jack when the braking test apparatus which concerns on this embodiment is further provided with a push pressure transmission member and a support member. It is an enlarged front view which shows an example of the structure around the jack when the push pressure transmission member shown in FIG. 19 is in sliding contact with a rail. It is a front view which shows an example of the schematic structure of the braking test apparatus which concerns on the modification of the said embodiment. It is a top view which shows an example of the schematic structure of the braking test apparatus which concerns on the modification of the said embodiment. It is a top view which shows an example of the schematic structure of the braking test apparatus which concerns on the 2nd application example. It is an enlarged front view which shows an example of the structure around the jack in the braking test apparatus which concerns on the 2nd application example.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the present specification and the drawings, components having substantially the same functional configuration are designated by the same reference numerals, so that duplicate description will be omitted.

<1. Comparative example>
First, with reference to FIG. 1, the braking test device 9 according to the comparative example will be described prior to the description of the braking test device 1 according to the embodiment of the present invention.

The braking test device 9 is a device used for a braking test on a clamp that generates a braking force by gripping the rail in a state of being fastened to a structure moving on a rail fixed to the ground or the like. For example, the structure is a crane, an unloader, etc. provided on the quay, and the braking test device 9 is a clamp for fixing a relatively large structure (a crane, an unloader, etc. provided on the quay) to the rail. Used for braking tests.

FIG. 1 is a front view showing an example of a schematic configuration of a braking test device 9 according to a comparative example.

As shown in FIG. 1, the braking test device 9 includes, for example, a test rail 910, a base portion 920, a clamp 930 to be subjected to a braking test, a jack 960, a fastening portion 980, and a guide roller 990. ..

The test rail 910 is a rail simulating a rail used for moving a structure fixed by a clamp 930 in an actual use state. The test rail 910 extends in the horizontal direction and is linearly movable relative to the base 920 in the extending direction. Specifically, the test rail 910 is supported by a plurality of guide rollers 990 arranged side by side on the bottom of the base 920 at intervals in the horizontal direction so as to be linearly movable in the extending direction.

The clamp 930 is fastened to the base 920 on the test rail 910, and the test rail 910 is in a movable state with respect to the clamp. The clamp 930 includes, for example, a main body portion 931, a wheel 932, and a grip portion 933. The main body portion 931 is fastened to the base portion 920 via the fastening portion 980. Here, since the fastening portion 980 and the base portion 920 have high rigidity, the overall inclination of the clamp 930 is unlikely to change even when a moment is applied to the clamp 930. Wheels 932 are rollable on test rails 910. A plurality of wheels 932 are provided below the main body portion 931, and for example, a plurality of wheels 932 are arranged side by side in the extending direction of the test rail 910. The grip portion 933 can grip the test rail 910. The grip portions 933 are provided so as to project downward from the main body portion 931 and, for example, are provided in pairs facing each other in the width direction of the test rail 910 via the test rail 910. By driving such a grip portion 933, the test rail 910 is gripped by the grip portion 933 in the width direction.

The jack 960 is a device that applies a pressing force F9 to the test rail 910 in the extending direction. As the jack 960, for example, a hydraulically actuated jack is used. Specifically, the jack 960 is provided between the end portion of the test rail 910 and the base portion 920 so as to be expandable and contractible in the extending direction of the test rail 910. For example, one end of the jack 960 is fixed to the base 920, and the other end of the jack 960 faces the end of the test rail 910. The base 920 is fixed, for example, to the ground. As a result, the pressing force F9 is input from the other end of the jack 960 to the end of the test rail 910 as the jack 960 operates.

The braking test method for performing the braking test using the braking test device 9 according to the comparative example includes an installation step, a fastening step, a gripping step, a pressing step, and a determination step.

First, in the braking test method according to the comparative example, an installation step is performed. The installation process is a process of installing the clamp 930 on the test rail 910. Specifically, in the installation process, the clamp 930 is installed on the test rail 910 so that the wheels 932 of the clamp 930 are in contact with the test rail 910.

Next, the fastening process is performed. The fastening step is a step of fastening the clamp 930 to the base 920. Specifically, in the fastening step, the main body portion 931 of the clamp 930 is fastened to the high-rigidity base portion 920 via the high-rigidity fastening portion 980.

Next, a gripping step is performed. The gripping step is a step of gripping the test rail 910 with the clamp 930. Specifically, in the gripping step, the test rail 910 is gripped in the width direction by the gripping portion 933 of the clamp 930.

Next, a pressing step is performed. The pressing step is a step of applying a pressing force F9 to the test rail 910 in the extending direction by the jack 960. When a pressing force F9 is applied to the test rail 910 in the extending direction, a braking force is generated on the clamp 930. Here, the braking force required for the clamp 930 to prevent the crane from escaping is defined as the reference unit braking force, and the pressing force that causes the clamp 930 to generate the reference unit braking force is defined as the reference unit pressing force. Specifically, in the pressing step, the jack 960 applies a reference unit pressing force to the test rail 910 gripped by the clamp 930. If the test rail 910 does not move with respect to the clamp 930, it is determined that the braking force generated in the clamp 930 is equal to or greater than the reference unit braking force, and if the test rail 910 moves with respect to the clamp 930, it occurs in the clamp 930. It is determined that the braking force is smaller than the reference unit braking force.

Next, a determination step is performed. The determination step is a step of determining whether or not the braking force generated in the clamp 930 is equal to or greater than the reference unit braking force, depending on whether or not the test rail 910 has moved with respect to the clamp 930. For example, in the determination step, first, it is determined whether or not the test rail 910 has moved with respect to the clamp 930 when a reference unit pressing force is applied to the test rail 910 in the extending direction. Then, when it is determined that the test rail 910 does not move with respect to the clamp 930, it is determined that the braking force generated in the clamp 930 is equal to or greater than the reference unit braking force. On the other hand, when it is determined that the test rail 910 has moved with respect to the clamp 930, it is determined that the braking force generated in the clamp 930 is smaller than the reference unit braking force.

By the way, in the braking test using the braking test device 9 according to the comparative example, it is difficult to bring the state around the clamp 930 closer to the actual usage state.

Specifically, in the braking test according to the comparative example, the pressing force F9 is applied to the test rail 910 in the extending direction, unlike the actual usage state. When the pressing force F9 is applied to the test rail 910, the test rail 910 is pushed and a frictional force is applied to the grip portion 933 in the extending direction. Since the frictional force is applied to the grip portion 933 in the extending direction, no load is applied to the grip portion 933 in the rotational direction. Therefore, the clamp 930 is less likely to fall toward the test rail 910, which is different from the actual usage state.

Further, in the braking test according to the comparative example, the clamp 930 is fastened to the high-rigidity base portion 920 via the high-rigidity fastening portion 980, unlike the actual use state. Therefore, even if the frictional force is applied to the grip portion 933 in the extending direction, the clamp 930 is less likely to fall toward the test rail 910 because the base portion 920 has high rigidity. As will be described later, the area of the portion of the grip portion 933 that comes into contact with the test rail 910 can vary depending on the overall inclination of the clamp 930. When the entire clamp 930 is tilted, the contact area between the grip portion 933 and the test rail 910 is reduced, and the braking force is reduced. That is, if the overall inclination of the clamp 930 in the braking test is different from the overall inclination of the clamp 930 in the actual use state, the braking force also differs, and the evaluation accuracy of the braking test deteriorates. It is conceivable to improve the evaluation accuracy of the braking test by setting the rigidity of the fastening portion 980 to be the same as the actual usage state. However, it is difficult to set the rigidity of the fastening portion 980 to be equivalent to the actual usage state. This is because it is difficult to accurately derive the rigidity applied to the clamp because the rigidity of the fastening portion 980 and the rigidity of the connecting portion of the crane are added to the clamp in the actual used state. Therefore, in the braking test according to the comparative example, only the braking force under specific conditions assuming that the rigidity applied to the clamp is high rigidity can be evaluated, and the evaluation accuracy is low.

Further, in the braking test according to the comparative example, the rail gripped by the clamp 930 is the test rail 910, which is different from the actual use state. Here, characteristics such as the dimensions, shape, and corrosion state of the rail used for moving the structure in the actual use state may change with the passage of time. Therefore, the characteristics of the test rail 910 can differ from the rails used to move structures in actual use. Therefore, the upper limit of the braking force by the clamp 930 may differ due to the difference in the characteristics of the rail gripped by the clamp 930 between the braking test and the actual use state. For example, the upper limit of the braking force by the clamp 930 may be lowered by reducing the widthwise dimension of the rail due to the wear of the rail. Further, for example, the upper limit of the braking force by the clamp 930 can be changed by changing the shape of the surface of the rail due to the corrosion of the rail.

As described above, in the braking test using the braking test device 9 according to the comparative example, the upper limit of the braking force by the clamp 930 is different from the actual usage state because the surrounding state of the clamp 930 is different from the actual usage state. obtain. Therefore, it may be difficult to accurately evaluate the braking force of the clamp 930.

The structure fixed by the clamp 930 in an actual use state is relatively large and therefore relatively heavy. Therefore, when a braking test is performed by applying a pressing force to the structure in a state where the structure is fastened to the clamp 930 on the rail as in an actual use state, a relatively large pressing force is required. On the other hand, since the test rail 910 is lighter than the structure, the pressing force that needs to be generated can be reduced in the braking test using the braking test device 9 according to the comparative example. Against this background, conventionally, a braking test using the test rail 910 described with reference to a comparative example has been performed.

<2. First Embodiment>
Next, the braking test device 1 according to the first embodiment of the present invention will be described.

The braking test device 1 is a device used for a braking test on a clamp 30 that generates a braking force by gripping the rail 10 in a state of being fastened to a crane 20 moving on a rail 10 fixed to the ground G1. .. The clamp 30 is specifically fastened to the crane 20 via a fastening portion 80, which will be described later, in an actual use state. The crane 20 corresponds to an example of the structure according to the present invention, and the structure according to the present invention may be another structure such as an unloader provided on the quay. Further, the place where the structure is provided is not limited to the quay, and may be another place. Further, the surface on which the rail 10 is fixed is not limited to the ground G1, and may be, for example, the surface of various pedestals installed indoors or outdoors (for example, the ceiling of a building). In other words, the braking test device according to the present invention is not limited to the device used for the braking test as described above, and for example, grips the rail in a state of being fastened to a crane moving on a rail fixed to the ceiling. This may be a device used for a braking test on a clamp that generates a braking force.

[2-1. Brake test device configuration]
First, the configuration of the braking test device 1 according to the present embodiment will be described with reference to FIGS. 2 to 10.

FIG. 2 is a front view showing an example of a schematic configuration of the braking test device 1 according to the present embodiment. FIG. 3 is a top view showing an example of a schematic configuration of the braking test device 1 according to the present embodiment.

The braking test device 1 includes, for example, as shown in FIGS. 2 and 3, a rail 10, a crane 20, a clamp 30, an anchor hole 40, a jack 60, a reaction force transmitting member 70, and a fastening portion 80. And. In the braking test using the braking test device 1, the braking force generated by gripping the rail 10 by the clamp 30 is evaluated.

The rail 10 is fixed to the ground G1 and is used for moving the crane 20. Specifically, the rails 10 are arranged side by side at intervals.

The crane 20 is a structure for lifting and transporting cargo. Specifically, the crane 20 is provided on the quay and is used for loading and unloading cargo on a ship moored on the quay. The crane 20 includes, for example, a frame portion 21, wheels 22, a wheel cover 23, and an anchor plate 24.

The frame portion 21 is configured to include, for example, a plurality of columnar members joined to each other, and is provided between the pair of rails 10. A movable portion (not shown) including a hook or the like on which a wire connected to the cargo is hung is mounted on the upper portion of the frame portion 21.

The wheels 22 are rollable on the rail 10. A plurality of wheels 22 are provided below the frame portion 21 and are provided for each rail 10. For example, two wheels 22 are provided on each rail 10 on the side of the clamp 30 that is fastened to the clamp 30 of the crane 20 and on the opposite side thereof. The wheel 22 is covered by the wheel cover 23. The wheel cover 23 is fixed to the frame portion 21. For example, one wheel cover 23 is provided on each rail 10 on the clamp 30 side and the opposite side of the crane 20. Each wheel cover 23 covers, for example, two adjacent wheels 22.

The anchor plate 24 is a member that fixes the crane 20 by engaging with the anchor plate 24 while being inserted into the anchor hole 40. The anchor plate 24 projects downward from the frame portion 21 and is provided for each rail 10. For example, the anchor plate 24 is provided between the wheel cover 23 on the clamp 30 side and the wheel cover 23 on the opposite side to the clamp 30 side in the lower part of the frame portion 21 for each rail 10. Each anchor plate 24 is provided, for example, on the side of the lower part of the frame portion 21. The anchor plate 24 is movable in a direction intersecting the ground G1, and is inserted into the anchor hole 40, for example, when the crane 20 receives an external force larger than an external force having a magnitude corresponding to a reference pressing force described later. As a result, the crane 20 can be fixed even when it is difficult to fix the crane 20 only by the braking force of the clamp 30.

The clamp 30 is fastened to the crane 20 in a state where it can move on the rail 10. Specifically, the clamp 30 is provided for each rail 10. A plurality of clamps 30 may be provided for each rail 10. The clamp 30 includes, for example, a main body portion 31, wheels 32, and a grip portion 33.

The main body portion 31 is fastened to the crane 20 via the fastening portion 80. The fastening portion 80 includes, for example, a first connecting portion 81 connected to the crane 20 and a second connecting portion 82 connected to the clamp 30. Specifically, the first connecting portion 81 is connected to the wheel cover 23 on the clamp 30 side of the crane 20 at one end side. The other end of the first connecting portion 81 and the other end of the second connecting portion 82 are engaged with each other, so that the main body portion 31 is fastened to the crane 20. The rigidity of the first connecting portion 81 is lower than the rigidity of the connecting portion of the comparative example, and the wheels 32 of the clamp 30 are placed on the rail 10 to keep the height of the grip portion 33 with respect to the rail 10 constant. Therefore, when the pressing force F1 is applied to the clamp 30, the entire clamp 30 tends to tilt.

The wheels 32 are rollable on the rail 10. A plurality of wheels 32 are provided in the lower part of the main body portion 31, and for example, a plurality of wheels 32 are arranged side by side in the extending direction of the rail 10.

The grip portion 33 can grip the rail 10. The grip portions 33 project downward from the main body portion 31, and are provided in pairs facing each other via the rail 10 in the width direction of the rail 10, for example. By driving such a grip portion 33, the rail 10 is gripped by the grip portion 33 in the width direction.

Here, the internal configuration of the clamp 30 for realizing the grip of the rail 10 by the grip portion 33 will be described. FIG. 4 is a cross-sectional view showing an example of the internal configuration of the clamp 30 according to the present embodiment. Specifically, FIG. 4 is a cross-sectional view of an AA cross section that passes through the clamp 30 shown in FIG. 2 and intersects in the extending direction of the rail 10.

For example, the grip portion 33 is connected to the lower portion of the main body portion 31 via the shaft portion 34, and is rotatably provided around the shaft portion 34. On the rail 10 side of the grip portion 33 below the shaft portion 34, a braking surface 33a facing the side surface of the wide portion 11 projecting from both sides in the width direction at the upper portion of the rail 10 is provided. Further, the grip portion 33 is connected to one end side of the link 36 via the shaft portion 35 on the upper end side, and is rotatably provided around the shaft portion 35 relative to the link 36. Further, the pair of links 36 connected to each grip portion 33 are connected to each other via the shaft portion 37 on the other end side, and are provided rotatably around the shaft portion 37 relative to each other.

For example, a hydraulic cylinder (not shown) is provided inside the clamp 30, so that the shaft portion 37 can be pushed downward by the hydraulic cylinder. When the shaft portion 37 is pushed downward, the clamp 30 grips the rail with a predetermined gripping force. That is, as shown in FIG. 4, the state in which the rail 10 is not gripped is switched to the state in which the rail 10 is gripped. Specifically, when the rail 10 is gripped, the braking surface 33a of the gripping portion 33 comes into contact with the side surface of the wide portion 11 of the rail 10, and a braking force is applied between the braking surface 33a and the side surface of the wide portion 11. appear. The gripping force is determined by the reference braking force / (friction coefficient of the braking surface 33a × 2). The coefficient of friction of the braking surface 33a is about 0.25.

The anchor hole 40 is recessed in the ground G1. The anchor hole 40 corresponds to an example of the recess according to the present invention, which is recessed in the surface to which the rail 10 is fixed. As described above, the anchor hole 40 is a hole into which the anchor plate 24 of the crane 20 is inserted, and is used for fixing the crane 20 by the anchor plate 24. For example, the anchor holes 40 are provided close to each rail 10 on the outside of the pair of rails 10. Specifically, a plurality of anchor holes 40 are provided for each rail 10 at intervals in the extending direction of the rail 10. The inner diameter of the anchor hole 40 is, for example, larger in the lower part than in the upper part.

The jack 60 is a device that applies a pressing force F1 to the crane 20 in the extending direction of the rail 10. The jack 60 corresponds to an example of the pressing device according to the present invention. As the jack 60, for example, a hydraulically actuated jack is used. The jack 60 is provided for each rail 10, for example.

For example, the jack 60 is provided between the wheel cover 23 of the crane 20 and the reaction force transmitting member 70 so as to be expandable and contractible in the extending direction of the rail 10.

Specifically, one end of the jack 60 is fixed to the reaction force transmitting member 70, and the other end of the jack 60 faces the side end of the wheel cover 23 in the extending direction of the rail 10. As a result, the pressing force F1 is input from the other end of the jack 60 to the side end of the wheel cover 23 as the jack 60 operates. Therefore, the crane 20 receives the pressing force F1 from the jack 60. The crane 20 is provided with a load portion that receives the pressing force F1 from the jack 60, and in the present embodiment, the load portion is one end surface of the wheel cover 23.

The other end of the jack 60 faces, for example, the side end of the wheel cover 23 on the opposite side of the clamp 30 side with respect to the clamp 30 side, as shown in FIGS. 2 and 3. The other end of the jack 60 may face the side end of the wheel cover 23 on the opposite side of the clamp 30 side on the clamp 30 side. Further, the other end of the jack 60 may face the side end on the opposite side of the wheel cover 23 on the clamp 30 side with respect to the clamp 30 side. Further, the other end of the jack 60 may face the side end of the wheel cover 23 on the clamp 30 side on the clamp 30 side.

As described above, the position of the wheel cover 23 that receives the pressing force F1 in the crane 20 and the position where the pressing force F1 is input in the wheel cover 23 are not limited to the examples shown in FIGS. 2 and 3. The positional relationship between the jack 60, the reaction force transmission member 70, the anchor hole 40, and the crane 20 is the position of the wheel cover 23 that receives the pressing force F1 in the crane 20 and the position where the pressing force F1 is input in the wheel cover 23. It can be changed as appropriate according to. Further, the direction of the pressing force F1 input from the jack 60 to the wheel cover 23 may be the extending direction of the rail 10, and is not limited to the examples shown in FIGS. 2 and 3.

The reaction force transmission member 70 is provided between the inner portion 41 of the anchor hole 40 and the jack 60, and is a member that transmits the reaction force R1 of the pressing force F1 generated by the jack 60 to the anchor hole 40. The reaction force transmission member 70 is provided for each rail 10, for example.

For example, the reaction force transmitting member 70 is installed at the bottom of the anchor hole 40 so that the portion opposite to the side fixed to the jack 60 comes into contact with the inner portion 41 of the anchor hole 40. Therefore, the upper portion of the reaction force transmitting member 70 projects upward with respect to the ground G1. Specifically, the dimensions of the reaction force transmission member 70 are set so that the upper portion of the reaction force transmission member 70 projects to a position where it can face the side end portion of the wheel cover 23 that receives the pressing force F1. As a result, the jack 60 can be stretchably provided between the wheel cover 23 and the reaction force transmitting member 70 in the extending direction of the rail 10. Therefore, it is realized that the pressing force F1 is applied to the crane 20 in the extending direction of the rail 10.

As described above, the pressing force F1 generated by the jack 60 is input from the other end of the jack 60 to the side end of the wheel cover 23. On the other hand, the reaction force R1 of the pressing force F1 generated by the jack 60 is input to the reaction force transmitting member 70 from one end of the jack 60. Here, the reaction force R1 input to the reaction force transmission member 70 is obtained by abutting the portion of the reaction force transmission member 70 on the side opposite to the side fixed to the jack 60 with the inner portion 41 of the anchor hole 40. It is transmitted to the inner portion 41 of the anchor hole 40.

Here, in order to further improve the evaluation accuracy of the braking force by the clamp 30, other members other than the members shown in FIGS. 2 and 3 may be further provided around the jack 60 in the braking test device 1. .. FIG. 5 is an enlarged front view showing an example of the configuration around the jack 60 when the braking test device 1 according to the present embodiment is further provided with the regulating member 110, the pressing force transmitting member 120, and the supporting member 130. At least a part of the regulation member 110, the pressing force transmission member 120, and the support member 130 may be omitted from the configuration of the braking test device 1.

The regulating member 110 is a member that regulates the tilting of the reaction force transmitting member 70 due to the reaction force R1 of the pressing force F1. The regulating member 110 is provided for, for example, each reaction force transmitting member 70.

For example, the regulating member 110 is fixed on the ground G1 in a state of being in contact with a portion of the upper portion of the reaction force transmitting member 70 projecting upward with respect to the ground G1 and a portion opposite to the side fixed to the jack 60. NS.

As described above, the reaction force R1 of the pressing force F1 generated by the jack 60 is input to the reaction force transmitting member 70 from one end of the jack 60. Here, the portion of the reaction force transmitting member 70 to which the other end of the jack 60 is fixed is located above the portion of the reaction force transmitting member 70 that comes into contact with the inner portion 41 of the anchor hole 40. Therefore, when the reaction force R1 of the pressing force F1 is input to the reaction force transmission member 70, a moment around the portion of the reaction force transmission member 70 that comes into contact with the inner portion 41 is applied to the reaction force transmission member 70. Specifically, a moment in the direction in which the upper portion of the reaction force transmitting member 70 is tilted toward the ground G1 on the opposite side of the jack 60 side is applied to the reaction force transmitting member 70. Therefore, the reaction force of the pressing force F1 is caused by the regulating member 110 being fixed on the ground G1 in a state of being in contact with the portion of the upper portion of the reaction force transmitting member 70 which is opposite to the side fixed to the jack 60. The fall of the reaction force transmitting member 70 due to R1 is regulated.

The pressing force transmitting member 120 is provided between the jack 60 and the crane 20 and is a member that transmits the pressing force F1 to the crane 20. The pressing force transmitting member 120 is provided for each jack 60, for example.

Specifically, one end of the pressing force transmitting member 120 faces the other end of the jack 60, and the other end of the pressing force transmitting member 120 faces the side end of the wheel cover 23. As a result, the pressing force F1 generated by the jack 60 is input from the other end of the jack 60 to one end of the pressing force transmitting member 120, and is transmitted to the side end of the wheel cover 23 via the pressing force transmitting member 120. ..

The support member 130 is a member that movably supports the push pressure transmission member 120 in the extending direction of the rail 10. The support member 130 is provided, for example, for each push pressure transmission member 120.

For example, the support member 130 includes a sliding portion 131, a strut portion 132, and a top plate portion 133. The sliding portion 131 is in sliding contact with the rail 10 and can slide on the rail 10. The strut portion 132 is provided so as to project upward from the sliding portion 131, and for example, a plurality of strut portions 132 are provided. The top plate portion 133 is connected to the upper portion of the support column portion 132 and has an upper surface substantially parallel to the ground G1. For example, by fixing the pressing force transmitting member 120 on such a top plate portion 133, the pressing force transmitting member 120 is movably supported in the extending direction of the rail 10. As a result, the pressing force transmitting member 120 can move in the extending direction of the rail 10.

The member itself that transmits the pressing force F1 to the crane 20 may be in sliding contact with the rail 10. In that case, the support member 130 is omitted from the configuration of the braking test device 1. FIG. 6 is an enlarged front view showing an example of the configuration around the jack 60 in such a case. In the example shown in FIG. 6, the pressing force transmitting member 220 is provided between the jack 60 and the crane 20 and transmits the pressing force F1 to the crane 20.

The pressing force transmitting member 220 includes, for example, a sliding portion 221, a strut portion 222, and a transmitting portion 223. The sliding portion 221 is in sliding contact with the rail 10 and can slide on the rail 10. The strut portion 222 is provided so as to project upward from the sliding portion 221 and, for example, a plurality of strut portions 222 are provided. The transmission unit 223 is connected to the upper part of the support column 222. Further, one end of the transmission portion 223 faces the other end of the jack 60, and the other end of the transmission portion 223 faces the side end of the wheel cover 23. As a result, the pressing force transmitting member 220 can transmit the pressing force F1 to the crane 20. Further, since the sliding portion 221 can slide on the rail 10, the pressing force transmitting member 220 can move in the extending direction of the rail 10.

Here, various modifications of the present embodiment will be described.

FIG. 7 is a front view showing an example of a schematic configuration of the braking test device 2 according to the first modification of the present embodiment. FIG. 8 is a top view showing an example of a schematic configuration of the braking test device 2 according to the first modification of the present embodiment.

In the braking test device 2 according to the first modification, unlike the braking test device 1 described above, the jack 60 is placed between the anchor plate 24 of the crane 20 and the reaction force transmitting member 70 in the extending direction of the rail 10. It is provided so that it can be expanded and contracted.

Specifically, one end of the jack 60 is fixed to the reaction force transmitting member 70, and the other end of the jack 60 faces the side end of the anchor plate 24 in the extending direction of the rail 10. As a result, the pressing force F1 is input from the other end of the jack 60 to the side end of the anchor plate 24 as the jack 60 operates. Therefore, the crane 20 receives the pressing force F1 from the jack 60. The crane 20 of the braking test device 2 according to the first modification is provided with a load portion that receives the pressing force F1 from the jack 60. In the first modification, the load portion is one end surface of the anchor plate 24. Is.

The other end of the jack 60 faces, for example, the side end of the anchor plate 24 opposite to the clamp 30 side, as shown in FIGS. 7 and 8. The other end of the jack 60 may face the side end of the anchor plate 24 on the clamp 30 side. As described above, the position where the pressing force F1 is input on the anchor plate 24 is not limited to the examples shown in FIGS. 7 and 8. The positional relationship between the jack 60, the reaction force transmission member 70, the anchor hole 40, and the crane 20 can be appropriately changed according to the position where the pressing force F1 is input on the anchor plate 24. Further, the direction of the pressing force F1 input from the jack 60 to the anchor plate 24 may be the extending direction of the rail 10, and is not limited to the examples shown in FIGS. 7 and 8.

At least a part of the above-mentioned regulation member 110, pressing force transmission member 120, and support member 130 may be further provided around the jack 60 in the braking test device 2. When the pressing force transmitting member 120 is provided in the braking test device 2, one end of the pressing force transmitting member 120 faces the other end of the jack 60, and the other end of the pressing force transmitting member 120 is a side end of the anchor plate 24. Facing the part.

As described above with reference to the first modification, the portion where the pressing force F1 is input in the crane 20 is not particularly limited. For example, the pressing force F1 from the jack 60 may be input to a portion of the crane 20 other than the wheel cover 23 and the anchor plate 24. The positional relationship between the jack 60, the reaction force transmitting member 70, the anchor hole 40, and the crane 20 can be appropriately changed according to the position of the portion of the crane 20 where the pressing force F1 is input.

FIG. 9 is a front view showing an example of a schematic configuration of the braking test device 3 according to the second modification of the present embodiment. FIG. 10 is a top view showing an example of a schematic configuration of the braking test device 3 according to the second modification of the present embodiment.

The braking test device 3 according to the second modification is provided with an end stopper 50, unlike the braking test device 1 described above. Therefore, the anchor hole 40 may be omitted from the configuration of the braking test device 3. Further, the reaction force transmission member 70 is provided between the outer portion 51 of the end stopper 50 and the jack 60.

The end stopper 50 is projected on the ground G1. The end stopper 50 corresponds to an example of a convex portion according to the present invention, which is convexly provided on a surface on which the rail 10 is fixed. The end stopper 50 is a stopper for preventing the crane 20 from derailing from the end of the rail 10. For example, the end stopper 50 is provided at the end of each rail 10 so that the outer portion 51 intersects the rail 10.

The reaction force transmitting member 70 is in contact with the jack 60, and the other side of the reaction force transmitting member 70 is in contact with the outer portion 51 of the end stopper 50, so that the reaction force transmitting member 70 is in contact with the ground G1. Will be installed in. Here, the length of the end stopper 50 in the vertical direction may be shorter than the height of the side end portion of the wheel cover 23 that receives the pressing force F1 in the vertical direction with respect to the ground G1. In that case, the length of the reaction force transmitting member 70 in the vertical direction is longer than that of the end stopper 50. Therefore, the upper portion of the reaction force transmitting member 70 projects upward with respect to the upper surface of the end stopper 50. Specifically, the dimensions of the reaction force transmission member 70 are set so that the upper portion of the reaction force transmission member 70 projects to a position where it can face the side end portion of the wheel cover 23 that receives the pressing force F1. As a result, the jack 60 can be stretchably provided between the wheel cover 23 and the reaction force transmitting member 70 in the extending direction of the rail 10. Therefore, it is realized that the pressing force F1 is applied to the crane 20 in the extending direction of the rail 10.

The pressing force F1 generated by the jack 60 is input from the other end of the jack 60 to the side end of the wheel cover 23. On the other hand, the reaction force R1 of the pressing force F1 generated by the jack 60 is input to the reaction force transmitting member 70 from one end of the jack 60. Here, the reaction force R1 input to the reaction force transmission member 70 is caused by the portion of the reaction force transmission member 70 on the opposite side to the side fixed to the jack 60 coming into contact with the outer portion 51 of the end stopper 50. It is transmitted to the outer portion 51 of the end stopper 50.

The portion of the crane 20 where the pressing force F1 is input is not particularly limited. For example, the pressing force F1 from the jack 60 may be input to the side end portion of the frame portion 21 opposite to the clamp 30 side. Further, the positional relationship between the jack 60, the reaction force transmission member 70, the end stopper 50, and the crane 20 can be appropriately changed according to the position of the portion of the crane 20 where the pressing force F1 is input.

At least a part of the above-mentioned regulation member 110, pressing force transmission member 120, and support member 130 may be further provided around the jack 60 in the braking test device 3. When the braking test device 3 is provided with the regulating member 110, the regulating member 110 is, for example, with respect to the side fixed to the jack 60 in the upper portion of the reaction force transmitting member 70 projecting upward with respect to the upper surface of the end stopper 50. It may be fixed to the upper surface of the end stopper 50 in a state of being in contact with the opposite portion.

As described above with reference to the second modification, the object to which the reaction force R1 of the pressing force F1 generated by the jack 60 is transmitted is a concave or convex recessed in the surface to which the rail 10 is fixed. It is not particularly limited as long as it is a convex portion.

[2-2. Braking test]
Subsequently, a braking test using the braking test device 1 according to the present embodiment will be described with reference to FIGS. 11 to 13. In the braking test using the braking test device 1, the braking force generated by gripping the rail 10 by the clamp 30 is evaluated.

FIG. 11 is a flowchart showing an example of a processing flow in a braking test method for performing a braking test using the braking test device 1 according to the present embodiment. FIG. 12 is an explanatory diagram for explaining the moment M1 applied to the clamp 30 in the braking test according to the present embodiment. FIG. 13 is an explanatory diagram for explaining the positional relationship between the braking surface 33a of the clamp 30 and the rail 10 in the braking test according to the present embodiment.

The braking test method for performing the braking test using the braking test device 1 according to the present embodiment includes a fastening step, a gripping step, a pressing step, and a determination step. The fastening process, the gripping process, the pressing process, and the determination process correspond to steps S501, S503, S505, and steps S507 to S511 in the flowchart shown in FIG. 11, respectively.

First, in the braking test method according to the present embodiment, the fastening step is performed. The fastening step is a step of fastening the clamp 30 to the crane 20 (step S501). Specifically, in the fastening step, each main body 31 of the pair of clamps 30 is fastened to the crane 20 via the fastening portion 80.

Next, a gripping step is performed. The gripping step is a step of gripping the rail 10 by the clamp 30 (step S503). Specifically, in the gripping step, the rail 10 is gripped in the width direction by each gripping portion 33 of the pair of clamps 30 with a predetermined gripping force.

Next, a pressing step is performed. The pressing step is a step (step S505) of applying a pressing force to the crane 20 in the extending direction of the rail 10 by the jack 60. When a pressing force is applied to the crane 20 in the extending direction, a braking force is generated in the clamp 30. Here, the braking force required for the clamp 30 to prevent the crane 20 from escaping is used as the reference braking force, and the pressing force that causes the clamp 30 to generate the reference braking force is used as the reference pressing force. Specifically, in the pressing step, the jack 60 applies a reference pressing force to the crane 20 to which the clamp 30 is fastened. If the crane 20 does not move on the rail 10, it is determined that the braking force generated in the clamp 30 is equal to or greater than the reference braking force, and if the crane 20 moves on the rail 10, the braking force generated in the clamp 30 is greater than the reference braking force. Is also determined to be small. Therefore, in an actual use state, it is required that the crane 20 is fixed by the clamp 30 until the external force applied to the crane 20 becomes equal to or higher than the reference pressing force.

In the present embodiment, a preparatory step is performed in advance of the pressing step, and in the preparatory step, a reaction force transmitting member 70 is provided between the inner portion 41 of the anchor hole 40 and the jack 60. Thereby, in the pressing step, the pressing force F1 is applied to the crane 20 by the jack 60 in the extending direction of the rail 10.

Next, a determination step is performed. The determination step is a step (step) of determining whether or not the braking force generated by gripping the rail 10 by the clamp 30 is equal to or greater than the reference braking force, depending on whether or not the crane 20 has moved on the rail 10. S507 to S511). In the determination step, specifically, it is determined whether or not the braking force generated by the pair of clamps 30 is equal to or greater than the reference braking force. For example, in the determination step, first, it is determined whether or not the crane 20 has moved on the rail 10 when a reference pressing force is applied to the crane 20 in the extending direction of the rail 10 (step S507). Then, when it is determined that the crane 20 has not moved on the rail 10 (step S507 / NO), it is determined that the braking force generated in the clamp 30 is equal to or greater than the reference braking force (step S509). On the other hand, when it is determined that the crane 20 has moved on the rail 10 (step S507 / YES), it is determined that the braking force by the clamp 30 is smaller than the reference braking force (step S511). After step S509 or step S511, the process shown in FIG. 11 ends.

In the braking test using the braking test device 1 according to the present embodiment, the state around the clamp 30 can be brought closer to the actual usage state, for example, as compared with the above-mentioned comparative example.

Specifically, in the braking test according to the present embodiment, the pressing force F1 is applied to the crane 20 in the extending direction of the rail 10 as in the actual use state. Since the crane 20 receives the pressing force F1 from the jack 60, as shown in FIG. 12, the pressing force F1 transmitted to the clamp 30 via the fastening portion 80 acts on the portion of the clamp 30 above the rail 10. do. Since the portion where the clamp 30 receives the pressing force F1 is located above the gripping portion 33, when the clamp 30 receives the pressing force F1, a load is applied to the gripping portion 33 in the rotational direction to generate a moment. Therefore, a moment is applied to the clamp 30.

Further, in the braking test according to the present embodiment, the clamp 30 is fastened to the crane 20 via the fastening portion 80 as in the actual use state. Further, the rigidity of the fastening portion 80 is lower than the rigidity of the connecting portion of the comparative example, and the wheels 32 of the clamp 30 are placed on the rail 10 to keep the height of the grip portion 33 with respect to the rail 10 constant. Therefore, when the pressing force F1 is applied to the clamp 30, the entire clamp 30 tends to tilt. Therefore, as shown in FIG. 12, the clamp 30 collapses in the extending direction of the rail 10 when the moment M1 is applied, as in the actual use state. As a result, the positional relationship between the braking surface 33a of the clamp 30 and the rail 10 changes.

For example, when the jack 60 is not operating, the moment M1 is not applied to the clamp 30, so that the clamp 30 does not fall due to the moment M1. When the clamp 30 is not tilted, for example, as shown in FIG. 13, the entire surface of the braking surface 33a is in contact with the side surface of the rail 10. On the other hand, when the jack 60 is operating, the moment M1 is applied to the clamp 30, so that the clamp 30 collapses due to the moment M1. When the clamp 30 is tilted, for example, as shown in FIG. 13, when the clamp 30 is tilted, a state in which a part of the braking surface 33a is not in contact with the side surface of the rail 10 may occur. As described above, the area of the portion of the braking surface 33a that comes into contact with the side surface of the rail 10 decreases according to the overall inclination of the clamp 30. Thereby, the upper limit of the braking force by the clamp 30 can be changed.

As an example, as shown in Table 1 below showing examples of each dimension in FIG. 13, when the height H of the braking surface 33a is 30 mm and the width of the braking surface 33a is 250 mm, the clamp 30 When no fall occurs, the contact area S is 7500 mm ² . In such a case, when the clamp 30 is tilted and the inclination angle θ of the entire clamp with respect to the rail 10 becomes 2 °, as shown in Table 1 below, the decrease ΔS of the contact area is 1091 mm ^2. become. That is, the contact area is reduced by about 15%. When the entire clamp is tilted by 2 °, the vertical displacement ΔH on one end side of the braking surface 33a in the width direction is about 9 mm. Since there is an upper limit to the frictional force per contact area, the braking force decreases as the contact area decreases.

As described above, in the braking test using the braking test device 1 according to the present embodiment, the moment M1 is applied to the clamp 30 as in the actual use state, and the extending direction of the rail 10 of the clamp 30 by the moment M1. A fall occurs. Therefore, the overall inclination of the clamp 30 can be brought closer to the actual usage state. Therefore, it is possible to prevent the upper limit of the braking force due to the clamp 30 from being different due to the difference in the overall inclination of the clamp 30 between the braking test and the actual use state.

Further, in the braking test according to the present embodiment, the rail gripped by the clamp 30 is the rail 10 used for moving the crane 20, as in the actual use state. Therefore, the rails gripped by the clamp 30 match between the braking test and the actual operating conditions. Therefore, the upper limit of the braking force by the clamp 30 differs between the braking test and the actual use state due to the difference in characteristics such as the dimensions, shape, and corrosion state of the rail gripped by the clamp 30. Can be suppressed.

[2-3. Effect of braking test device]
Subsequently, the effect of the braking test device 1 according to the present embodiment will be described.

In the braking test device 1 according to the present embodiment, a reaction force transmitting member 70 for transmitting the reaction force R1 of the pressing force F1 by the jack 60 to the anchor hole 40 is provided between the inner portion 41 of the anchor hole 40 and the jack 60. Be done. Further, in the braking test device 1 according to the present embodiment, the jack 60 applies a pressing force F1 evenly to both sides of the crane 20. That is, the jack 60 can realize that the pressing force F1 is evenly applied to both sides of the crane 20 in the extending direction of the rail 10. Therefore, in the braking test using the braking test device 1 according to the present embodiment, the state around the clamp 30 can be brought closer to the actual usage state, for example, as compared with the above-mentioned comparative example.

Specifically, in the braking test according to the present embodiment, the pressing force F1 is applied to the crane 20 in the extending direction of the rail 10 as in the actual use state. Therefore, a moment M1 around a portion of the rail 10 gripped by the clamp 30 is applied to the clamp 30. Further, in the braking test according to the present embodiment, the pressing force F1 is evenly applied to both sides of the crane 20 as in the actual use state. Therefore, the pressing force F1 can be applied to the clamp 30 without generating a moment around the vertical direction of the crane 20 on the rail 10. Further, in the braking test according to the present embodiment, the clamp 30 is fastened to the crane 20 via the fastening portion 80 as in the actual use state. Therefore, the moment M1 causes the clamp 30 to fall in the extending direction of the rail 10. Therefore, it is possible to prevent the upper limit of the braking force due to the clamp 30 from being different due to the difference in the overall inclination of the clamp 30 between the braking test and the actual use state.

Further, in the braking test according to the present embodiment, the rail gripped by the clamp 30 is the rail 10 used for moving the crane 20, as in the actual use state. Therefore, the upper limit of the braking force by the clamp 30 differs between the braking test and the actual use state due to the difference in characteristics such as the dimensions, shape, and corrosion state of the rail gripped by the clamp 30. Can be suppressed. For example, both the braking test clamp 30 in the present embodiment and the braking test clamp 930 in the comparative example have a structure in which the clamps 30 and 930 amplify the gripping force by the lever force. Therefore, the gripping force of the gripping portions 33 and 933 of the clamps 30 and 930 differs depending on whether or not the rail 10 (test rail 910) is thinned. In the braking test of the comparative example, the test rail 910 is not the rail actually used. Therefore, if the side surface of the rail actually used is thinned, the braking test cannot be performed in the actual usage state, and the braking force should be accurately evaluated in the braking test of the comparative example. I can't. In addition, some of the grips 33 and 933 that come into contact with the rail may corrode. If the contact state of the grip portions 33 and 933 with respect to the rail is different from the actual use state, the braking force cannot be accurately evaluated. However, in the braking test of the present embodiment, since the contact state of the grip portion 33 with respect to the rail 10 is the actual usage state, the braking force can be evaluated correctly. In this embodiment, the reliability of the evaluation of the braking force is obtained from the point that this point can be reproduced.

As described above, in the braking test using the braking test device 1 according to the present embodiment, the state around the clamp 30 can be brought closer to the actual usage state, so that the upper limit of the braking force by the clamp 30 is the actual usage state. It is possible to suppress the difference from. Therefore, the braking force due to the clamp 30 can be evaluated with high accuracy.

As described with reference to the second modification, the object to which the reaction force R1 of the pressing force F1 generated by the jack 60 is transmitted via the reaction force transmitting member 70 is the surface to which the rail 10 is fixed. It may be a recessed concave portion or a convex convex portion, and may be, for example, an end stopper 50. Even in such a case, the same effect as that of the braking test device 1 described above can be obtained.

Here, if the jack 60 is provided between the crane 20 and the end stopper 50 without using the reaction force transmitting member 70, the pressing force F1 is appropriately applied to the crane 20 in the extending direction of the rail 10. It becomes difficult to do. Specifically, when the vertical length of the end stopper 50 is shorter than the vertical height of the portion of the crane 20 that receives the pressing force F1 with respect to the ground G1, the jack 60 expands and contracts in the extending direction of the rail 10. It becomes difficult to provide it freely. As a result, a component in the vertical direction can be generated in the pressing force F1 applied to the crane 20, so that the component in the extending direction of the rail 10 can be smaller than the intended size. Further, when the crane 20 is pushed and moved in the vertical direction, it may be difficult to stably apply the pushing pressure F1 to the crane 20.

On the other hand, by providing the reaction force transmitting member 70 between the outer portion 51 of the end stopper 50 and the jack 60, the jack 60 can be attached to the wheel cover 23 and the reaction force transmitting member regardless of the length of the end stopper 50 in the vertical direction. It can be flexibly provided between the rail 10 and the rail 10 in the extending direction. As a result, it is possible to appropriately apply the pressing force F1 to the crane 20 in the extending direction of the rail 10.

Further, the braking test device 1 may include a regulating member 110 that regulates the fall of the reaction force transmitting member 70 due to the reaction force R1 of the pressing force F1. As a result, the fall of the reaction force transmitting member 70 due to the reaction force R1 of the pressing force F1 is restricted, so that the jack 60 can be stably maintained in a state of being expandable and contractible in the extending direction of the rail 10. Therefore, the pressing force F1 can be appropriately applied to the crane 20 in the extending direction of the rail 10. Therefore, the evaluation accuracy of the braking force by the clamp 30 can be further improved.

Further, the braking test device 1 may be provided between the jack 60 and the crane 20 and may include a pressing force transmitting member 120 for transmitting the pressing force F1 to the crane 20. As a result, the pressing force F1 can be more stably applied to the crane 20 regardless of the positional relationship between the jack 60 and the crane 20 and the shape of the portion of the crane 20 that receives the pressing force F1. Therefore, the evaluation accuracy of the braking force by the clamp 30 can be further improved. For example, by matching the shape of the portion of the pressing force transmission member 120 on the crane 20 side with the shape of the portion of the crane 20 on the pressing force transmission member 120 side, stable application of the pressing force F1 to the crane 20 is realized. obtain.

Further, in the braking test device 1, the pressing force transmitting member 120 may be movable in the extending direction of the rail 10. As a result, the pressing force F1 can be appropriately applied to the crane 20 depending on the extending direction of the rail 10. Therefore, the evaluation accuracy of the braking force by the clamp 30 can be further improved.

Further, the braking test device 1 may include a support member 130 that movably supports the pressing force transmission member 120 in the extending direction of the rail 10. Thereby, the pressing force transmitting member 120 can be moved in the extending direction of the rail 10 regardless of the size and shape of the pressing force transmitting member 120.

<3. First application example>
Next, the braking test device 4 according to the first application example will be described with reference to FIGS. 14 and 15.

FIG. 14 is a top view showing an example of a schematic configuration of the braking test device 4 according to this application example.

In the braking test device 4 according to this application example, unlike the braking test device 1 described above, one jack 60 is provided for each pair of rails 10. Further, in the braking test device 4, a reaction force transmission member 140 is further provided between the inner portion 41 of the anchor hole 40 and the jack 60 in addition to the reaction force transmission member 70. Further, in the braking test device 4, a pressing force transmitting member 150 is provided between the jack 60 and the crane 20.

The jack 60 is provided between the pressing force transmitting member 150 and the reaction force transmitting member 140 so as to be expandable and contractible in the extending direction of the rail 10.

The reaction force transmission member 140 is provided between the jack 60 and the pair of reaction force transmission members 70 provided for each rail 10, and the reaction force R1 of the pressing force F1 generated by the jack 60 is transferred to the pair of reaction force transmission members 70. It is a member to transmit. For example, the reaction force transmission member 140 extends between the pair of reaction force transmission members 70 in the parallel direction of the rails 10. Both ends of the side surface 140a on one side along the extending direction of the reaction force transmitting member 140 are fixed to each reaction force transmitting member 70, respectively. Further, the side surface 140b on the other side along the extending direction of the reaction force transmitting member 140 is fixed to one end of the jack 60.

The reaction force transmission member 70 is provided between the inner portion 41 of the anchor hole 40 and the reaction force transmission member 140, and transmits the reaction force R1 transmitted via the reaction force transmission member 140 to the anchor hole 40. The reaction force transmitting member 70 is provided for each rail 10 as described above. For example, the reaction force transmission member 70 is installed at the bottom of the anchor hole 40 so that the portion opposite to the side fixed to the reaction force transmission member 140 comes into contact with the inner portion 41 of the anchor hole 40.

The pressing force transmitting member 150 is provided between the jack 60 and the crane 20 and is a member that transmits the pressing force F1 to the pair of wheel covers 23. Specifically, the pressing force transmitting member 150 includes an extending portion 151 and a protruding portion 152. The extending portion 151 extends between the pair of rails 10 in the parallel direction of the rails 10. For example, the side surface 151a on one side of the extending portion 151 along the extending direction faces the other end portion of the jack 60. The protruding portion 152 projects from both ends of the extending portion 151 toward the crane 20 side. For example, the projecting portion 152 projects from both ends of the side surface 151b on the other side along the extending direction of the extending portion 151 toward the crane 20 side. Further, the tip portions of the protruding portions 152 face each of the pair of wheel covers 23 arranged in the parallel direction of the rails 10.

As shown in FIG. 14, for example, the protruding portion 152 of the pressing force transmitting member 150 faces the side end portion on the opposite side of the clamp 30 side of the pair of wheel covers 23 on the opposite side to the clamp 30 side. do. The protruding portion 152 of the pressing force transmitting member 150 may face the side end portion on the clamp 30 side of the pair of wheel covers 23 on the opposite side to the clamp 30 side. Further, the protruding portion 152 of the pressing force transmitting member 150 may face the side end portion on the opposite side of the pair of wheel covers 23 on the clamp 30 side with respect to the clamp 30 side. Further, the protruding portion 152 of the pressing force transmitting member 150 may face the side end portion on the clamp 30 side of the pair of wheel covers 23 on the clamp 30 side.

As described above, the positions of the pair of wheel covers 23 that receive the pressing force F1 in the crane 20 and the positions where the pressing force F1 is input in the pair of wheel covers 23 are not limited to the example shown in FIG. The positional relationship between the jack 60, the reaction force transmission member 70, the reaction force transmission member 140, the push pressure transmission member 150, the anchor hole 40, and the crane 20 and the shape of each member are the pair of wheel covers that receive the push pressure F1. It can be appropriately changed depending on the position of the crane 20 of the 23 and the position where the pressing force F1 is input to the pair of wheel covers 23. Further, the direction of the pressing force F1 input to the pair of wheel covers 23 may be the extending direction of the rail 10, and is not limited to the example shown in FIG.

The pressing force F1 generated by the jack 60 is input to the pressing force transmitting member 150 from the other end of the jack 60, and is distributed and transmitted to each side end of the pair of wheel covers 23 via the pressing force transmitting member 150. NS. On the other hand, the reaction force R1 of the pressing force F1 generated by the jack 60 is input to the reaction force transmission member 140 from one end of the jack 60, and is distributed and transmitted to each reaction force transmission member 70 via the reaction force transmission member 140. NS. Here, the portion of the reaction force transmitting member 70 opposite to the side fixed to the reaction force transmitting member 140 comes into contact with the inner portion 41 of the anchor hole 40, so that the reaction force transmitting member 70 is distributed to each reaction force transmitting member 70. The transmitted reaction force R1 is transmitted to the inner portion 41 of each anchor hole 40. As described above, a plurality of reaction force transmitting members may be provided between the inner portion 41 of the anchor hole 40 and the jack 60. Even in that case, the reaction force R1 of the pressing force F1 is transmitted to the anchor hole 40 by the plurality of reaction force transmitting members.

In the braking test device 4 according to this application example, a pressing force transmitting member 150 is provided between the jack 60 and the crane 20. Further, the pressing force transmitting member 150 has an extending portion 151 extending in the parallel direction of the rails 10 between the pair of rails 10 and a protruding portion protruding from both ends of the extending portion 151 toward the crane 20 side. It is equipped with 152.

Here, when the pressing force F1 is individually applied to the crane 20 from the jacks 60 provided for each rail 10 without using the pressing force transmitting member 150, the force transmitted to both sides of the crane 20 is applied. It can be non-uniform.

On the other hand, in this application example, one jack 60 presses the center of the pressing force transmitting member 150, and the pressing force F1 is transmitted to both sides of the crane 20 via the pressing force transmitting member 150. Therefore, the pressing force F1 generated by one jack 60 can be uniformly distributed and transmitted to both sides of the crane 20. Therefore, it is possible to suppress the application of a moment around the vertical axis to the crane 20 due to the non-uniform force transmitted to both sides of the crane 20. Therefore, it is possible to prevent the application of the pressing force F1 to the crane 20 from becoming unstable due to the crane 20 being pushed and moved by such a moment. Therefore, according to this application example, the pressing force F1 can be more appropriately applied to the crane 20 in the extending direction of the rail 10. Therefore, the evaluation accuracy of the braking force by the clamp 30 can be further improved.

Similar to the braking test device 1 described above, a member other than the member shown in FIG. 14 is formed around the jack 60 in the braking test device 4 in order to further improve the evaluation accuracy of the braking force by the clamp 30. Further may be provided. FIG. 15 is an enlarged front view showing an example of the configuration around the jack 60 in the braking test device 4 according to the present application example.

The braking test device 4 may further include a regulating member 110 and a support member 130, as in the case of the braking test device 1 described above. At least a part of the regulation member 110 and the support member 130 may be omitted from the configuration of the braking test device 4. The pressing force transmitting member 150 can be movably supported by the supporting member 130 in the extending direction of the rail 10. The pressing force transmitting member 150 itself may be in sliding contact with the rail 10, and in that case, the supporting member 130 is omitted from the configuration of the braking test device 4.

Further, in the above, as a first application example, an example in which the portion of the crane 20 to which the pressing force F1 is transmitted is the wheel cover 23 has been described, but the portion of the crane 20 to which the pressing force F1 is transmitted is not particularly limited. .. For example, the portion of the crane 20 to which the pressing force F1 is transmitted may be the anchor plate 24.

Further, in the above, as a first application example, an example in which the reaction force R1 of the pressing force F1 generated by the jack 60 is transmitted to the anchor hole 40 has been described, but the target to which the reaction force R1 is transmitted is the rail. It is not particularly limited as long as it is a concave portion recessed or a convex convex portion on the surface to which the 10 is fixed. For example, the target to which the reaction force R1 is transmitted may be the end stopper 50.

<4. Second embodiment>
Next, the braking test device 5 according to the second embodiment of the present invention will be described.

Similar to the braking test device 1 described above, the braking test device 5 is a clamp 30 that generates a braking force by gripping the rail 10 while being fastened to the crane 20 moving on the rail 10 fixed to the ground G1. It is a device used for the braking test of. In the second embodiment as well, as in the first embodiment described above, the crane 20 is only an example of the structure according to the present invention, and the ground G1 is only an example of the surface on which the rail 10 is fixed. No.

[4-1. Brake test device configuration]
First, the configuration of the braking test device 5 according to the present embodiment will be described with reference to FIGS. 16 to 22.

FIG. 16 is a front view showing an example of a schematic configuration of the braking test device 5 according to the present embodiment. FIG. 17 is a top view showing an example of a schematic configuration of the braking test device 5 according to the present embodiment.

The braking test device 5 includes, for example, as shown in FIGS. 16 and 17, a rail 10, a crane 20, a clamp 30, a jack 60, a reaction force transmitting member 170, and a fastening portion 80. In the braking test using the braking test device 5, the braking force generated by gripping the rail 10 by the clamp 30 is evaluated as in the braking test device 1 described above.

In the braking test device 5 according to the second embodiment, unlike the braking test device 1 described above, the reaction force transmitting member 170 is fixed to the rail 10, and the reaction force R1 of the pressing force F1 generated by the jack 60 is transferred to the rail 10. introduce. Therefore, the concave portion such as the anchor hole 40 and the convex portion such as the end stopper 50 can be omitted from the configuration of the braking test device 5. The details of the components of the rail 10, the crane 20, and the clamp 30 and the positional relationship between the components are the same as those of the braking test device 1 described above, and thus the description thereof will be omitted.

As described above, the jack 60 is a device that applies a pressing force F1 to the crane 20 in the extending direction of the rail 10, and is provided for each rail 10, for example. Further, the jack 60 is provided between the wheel cover 23 of the crane 20 and the reaction force transmitting member 170 so as to be expandable and contractible in the extending direction of the rail 10.

Specifically, one end of the jack 60 is fixed to the reaction force transmitting member 170, and the other end of the jack 60 faces the side end of the wheel cover 23 in the extending direction of the rail 10. As a result, the pressing force F1 is input from the other end of the jack 60 to the side end of the wheel cover 23 as the jack 60 operates. Therefore, the crane 20 receives the pressing force F1 from the jack 60. The crane 20 is provided with a load portion that receives the pressing force F1 from the jack 60, and in the present embodiment, the load portion is one end surface of the wheel cover 23.

The other end of the jack 60 faces, for example, the side end of the wheel cover 23 on the opposite side of the clamp 30 side with respect to the clamp 30 side, as shown in FIGS. 16 and 17. The other end of the jack 60 may face the side end of the wheel cover 23 on the opposite side of the clamp 30 side on the clamp 30 side. Further, the other end of the jack 60 may face the side end on the opposite side of the wheel cover 23 on the clamp 30 side with respect to the clamp 30 side. Further, the other end of the jack 60 may face the side end of the wheel cover 23 on the clamp 30 side on the clamp 30 side.

As described above, the position of the wheel cover 23 that receives the pressing force F1 in the crane 20 and the position where the pressing force F1 is input in the wheel cover 23 are not limited to the examples shown in FIGS. 16 and 17. The positional relationship between the jack 60, the reaction force transmitting member 170, and the crane 20 is appropriately determined according to the position of the wheel cover 23 that receives the pressing force F1 in the crane 20 and the position where the pressing force F1 is input in the wheel cover 23. Can be changed. Further, the direction of the pressing force F1 input from the jack 60 to the wheel cover 23 may be the extending direction of the rail 10, and is not limited to the examples shown in FIGS. 16 and 17.

The reaction force transmission member 170 is a member that is fixed to the rail 10 and transmits the reaction force R1 of the pressing force F1 generated by the jack 60 to the rail 10. The reaction force transmission member 170 is provided for each rail 10, for example.

For example, the reaction force transmitting member 170 is fixed to the rail 10 by welding as shown in FIG. Specifically, the reaction force transmission member 170 is placed on the upper part of the rail 10, and the lower part of the reaction force transmission member 170 and the upper part of the rail 10 are fixed to each other by welding. In this case, after the braking test for the clamp 30 is completed, for example, the reaction force transmitting member 170 fixed to the rail 10 by welding is removed from the rail 10 to be restricted by the reaction force transmitting member 170. The crane 20 can be made movable in the direction. Further, for example, the crane 20 can be moved in the direction restricted by the reaction force transmission member 170 by partially replacing the portion of the rail 10 on which the reaction force transmission member 170 is fixed with a new rail. Can be.

The method of fixing the reaction force transmitting member 170 to the rail 10 is not limited to the above example. FIG. 18 is an explanatory diagram for explaining another example of the method of fixing the reaction force transmitting member 170 to the rail 10. For example, as shown in FIG. 18, a vise 180 may be used to fix the reaction force transmitting member 170 to the rail 10. Specifically, a pair of flange portions 170a projecting on both sides along the extending direction of the rail 10 are provided below the reaction force transmitting member 170, and each flange portion 170a and the rail 10 are provided with a pair of vices in the vertical direction. The reaction force transmitting member 170 can be fixed to the rail 10 by sandwiching and fixing the reaction force by 180. Further, for example, the reaction force transmission member 170 may be fixed to the rail 10 by screwing with bolts and nuts.

The reaction force transmitting member 170 is fixed to the rail 10 so that, for example, the outer portion 171 of the reaction force transmitting member 170 intersects the rail 10 and comes into contact with one end of the jack 60. Specifically, the dimensions of the reaction force transmission member 170 are set so that the upper portion of the reaction force transmission member 170 projects to a position where it can face the side end portion of the wheel cover 23 that receives the pressing force F1. As a result, the jack 60 can be stretchably provided between the wheel cover 23 and the reaction force transmitting member 170 in the extending direction of the rail 10. Therefore, it is realized that the pressing force F1 is applied to the crane 20 in the extending direction of the rail 10.

As described above, the pressing force F1 generated by the jack 60 is input from the other end of the jack 60 to the side end of the wheel cover 23. On the other hand, the reaction force R1 of the pressing force F1 generated by the jack 60 is input to the reaction force transmitting member 170 from one end of the jack 60. Here, since the reaction force transmission member 170 is fixed to the rail 10, the reaction force R1 input to the reaction force transmission member 170 is transmitted to the rail 10.

Here, in order to further improve the evaluation accuracy of the braking force by the clamp 30, other members other than the members shown in FIGS. 16 and 17 may be further provided around the jack 60 in the braking test device 5. .. FIG. 19 is an enlarged front view showing an example of the configuration around the jack 60 when the braking test device 5 according to the present embodiment is further provided with the pressing force transmitting member 120 and the supporting member 130. The support member 130 may be omitted from the configuration of the braking test device 5.

As described above, the pressing force transmitting member 120 is a member provided between the jack 60 and the crane 20 to transmit the pressing force F1 to the crane 20. The pressing force transmitting member 120 is provided for each jack 60, for example.

As described above, the support member 130 is a member that movably supports the pressing force transmission member 120 in the extending direction of the rail 10. The support member 130 is provided, for example, for each push pressure transmission member 120.

The member itself that transmits the pressing force F1 to the crane 20 may be in sliding contact with the rail 10. In that case, the support member 130 is omitted from the configuration of the braking test device 5. FIG. 20 is an enlarged front view showing an example of the configuration around the jack 60 in such a case. In the example shown in FIG. 20, the above-mentioned pressing force transmitting member 220 is used as a member provided between the jack 60 and the crane 20 and transmitting the pressing force F1 to the crane 20.

Here, a modification of the present embodiment will be described.

FIG. 21 is a front view showing an example of a schematic configuration of the braking test device 6 according to the modified example of the present embodiment. FIG. 22 is a top view showing an example of a schematic configuration of the braking test device 6 according to the modified example in the present embodiment.

In the braking test device 6 according to this modification, unlike the braking test device 5 described above, the jack 60 can expand and contract in the extending direction of the rail 10 between the anchor plate 24 of the crane 20 and the reaction force transmitting member 170. It is provided in.

Specifically, one end of the jack 60 is fixed to the reaction force transmitting member 170, and the other end of the jack 60 faces the side end of the anchor plate 24 in the extending direction of the rail 10. As a result, the pressing force F1 is input from the other end of the jack 60 to the side end of the anchor plate 24 as the jack 60 operates. Therefore, the crane 20 receives the pressing force F1 from the jack 60. The crane 20 of the braking test device 6 according to this modification is provided with a load portion that receives the pressing force F1 from the jack 60, and the load portion is one end surface of the anchor plate 24 in this modification.

The other end of the jack 60 faces, for example, the side end of the anchor plate 24 opposite to the clamp 30 side, as shown in FIGS. 21 and 22. The other end of the jack 60 may face the side end of the anchor plate 24 on the clamp 30 side. As described above, the position where the pressing force F1 is input on the anchor plate 24 is not limited to the examples shown in FIGS. 21 and 22. The positional relationship between the jack 60, the reaction force transmission member 170, and the crane 20 can be appropriately changed according to the position where the pressing force F1 is input on the anchor plate 24. Further, the direction of the pressing force F1 input from the jack 60 to the anchor plate 24 may be the extending direction of the rail 10, and is not limited to the examples shown in FIGS. 21 and 22.

The push pressure transmission member 120 described above may be further provided around the jack 60 in the braking test device 6, and a support member 130 may be additionally provided. When the pressing force transmitting member 120 is provided in the braking test device 6, one end of the pressing force transmitting member 120 faces the other end of the jack 60, and the other end of the pressing force transmitting member 120 is a side end of the anchor plate 24. Facing the part.

As described above with reference to this modification, the portion where the pressing force F1 is input in the crane 20 is not particularly limited. For example, the pressing force F1 from the jack 60 may be input to a portion of the crane 20 other than the wheel cover 23 and the anchor plate 24. The positional relationship between the jack 60, the reaction force transmission member 170, and the crane 20 can be appropriately changed according to the position of the portion of the crane 20 where the pressing force F1 is input.

[4-2. Braking test]
Subsequently, a braking test using the braking test device 5 according to the present embodiment will be described. In the braking test using the braking test device 5, the braking force generated by gripping the rail 10 by the clamp 30 is evaluated.

The braking test method for performing the braking test using the braking test device 5 according to the present embodiment includes a fastening step, a gripping step, a pressing step, and a determination step, similarly to the braking test method using the braking test device 1 described above. including. The details and order of each of the fastening step, the gripping step, the pressing step, and the determining step are the same as those described above with reference to the flowchart shown in FIG. 11, and thus the description thereof will be omitted.

In the braking test method using the braking test device 5 according to the second embodiment, unlike the braking test method using the braking test device 1 described above, the reaction force transmitting member 170 is attached to the rail 10 in the preparatory step performed in advance of the pressing step. It is fixed. Thereby, in the pressing step, the pressing force F1 is applied to the crane 20 by the jack 60 in the extending direction of the rail 10.

In the braking test using the braking test device 5 according to the present embodiment, as in the braking test using the braking test device 1 described above, for example, as compared with the comparative example described above, the state around the clamp 30 is actually changed. It can be brought closer to the state of use.

Specifically, in the braking test according to the present embodiment, the pressing force F1 is applied to the crane 20 in the extending direction of the rail 10 as in the actual use state, so that the clamp 30 has a rail. At No. 10, a moment M1 around a portion gripped by the clamp 30 is applied.

Further, in the braking test according to the present embodiment, as in the actual use state, the clamp 30 is fastened to the crane 20 via the fastening portion 80, so that the rail 10 of the clamp 30 is extended in the extending direction by the moment M1. Collapse occurs. As a result, the overall inclination of the clamp 30 can be brought closer to the actual use state. Therefore, the clamp 30 causes the overall inclination of the clamp 30 to differ between the braking test and the actual use state. It is possible to suppress the difference in the upper limit of the braking force.

Further, in the braking test according to the present embodiment, as in the actual usage state, the rail gripped by the clamp 30 is the rail 10 used for moving the crane 20, so that the braking test and the actual usage state are different. It is possible to prevent the upper limit of the braking force of the clamp 30 from being different due to the difference in characteristics such as the size, shape, and corrosion state of the rail gripped by the clamp 30.

[4-3. Effect of braking test device]
Subsequently, the effect of the braking test device 5 according to the present embodiment will be described.

In the braking test device 5 according to the present embodiment, the reaction force transmission member 170 that transmits the reaction force R1 of the pressing force F1 generated by the jack 60 to the rail 10 is fixed to the rail 10. Further, in the braking test device 5 according to the present embodiment, the jack 60 applies a pressing force F1 evenly to both sides of the crane 20. That is, the jack 60 can realize that the pressing force F1 is evenly applied to both sides of the crane 20 in the extending direction of the rail 10. Therefore, in the braking test using the braking test device 5 according to the present embodiment, similarly to the braking test using the braking test device 1 described above, for example, the state around the clamp 30 is compared with the comparative example described above. It can be brought closer to the actual usage state. Therefore, as in the braking test using the braking test device 1 described above, it is possible to prevent the upper limit of the braking force due to the clamp 30 from being different from the actual use state. Therefore, the braking force due to the clamp 30 can be evaluated with high accuracy. In particular, regarding the braking test using the braking test device 5, the braking test can be performed even when there are no recesses or protrusions on the surface to which the rail 10 is fixed around the crane 20.

Further, the braking test device 5 may be provided between the jack 60 and the crane 20 and may include a pressing force transmitting member 120 for transmitting the pressing force F1 to the crane 20. As a result, the pressing force F1 can be more stably applied to the crane 20 regardless of the positional relationship between the jack 60 and the crane 20 and the shape of the portion of the crane 20 that receives the pressing force F1. Therefore, the evaluation accuracy of the braking force by the clamp 30 can be further improved. For example, by matching the shape of the portion of the pressing force transmission member 120 on the crane 20 side with the shape of the portion of the crane 20 on the pressing force transmission member 120 side, stable application of the pressing force F1 to the crane 20 is realized. obtain.

Further, in the braking test device 5, the pressing force transmitting member 120 may be movable in the extending direction of the rail 10. As a result, the pressing force F1 can be appropriately applied to the crane 20 depending on the extending direction of the rail 10. Therefore, the evaluation accuracy of the braking force by the clamp 30 can be further improved.

Further, the braking test device 5 may include a support member 130 that movably supports the pressing force transmission member 120 in the extending direction of the rail 10. Thereby, the pressing force transmitting member 120 can be moved in the extending direction of the rail 10 regardless of the size and shape of the pressing force transmitting member 120.

<5. Second application example>
Next, the braking test device 7 according to the second application example will be described with reference to FIGS. 23 and 24.

FIG. 23 is a top view showing an example of a schematic configuration of the braking test device 7 according to this application example.

In the braking test device 7 according to the present application example, unlike the braking test device 5 described above, one jack 60 is provided for each pair of rails 10. Further, in the braking test device 7, a reaction force transmission member 140 is provided between the reaction force transmission member 170 and the jack 60. Further, in the braking test device 7, a pressing force transmitting member 150 is provided between the jack 60 and the crane 20.

The jack 60 is provided between the pressing force transmitting member 150 and the reaction force transmitting member 140 so as to be expandable and contractible in the extending direction of the rail 10.

The reaction force transmission member 140 is provided between the jack 60 and the pair of reaction force transmission members 170 provided for each rail 10, and the reaction force R1 of the pressing force F1 generated by the jack 60 is transferred to the pair of reaction force transmission members 170. It is a member to transmit. For example, the reaction force transmitting member 140 extends between the pair of reaction force transmitting members 170 in the parallel direction of the rails 10. Both ends of the side surface 140a on one side along the extending direction of the reaction force transmitting member 140 are fixed to each reaction force transmitting member 170, respectively. Further, the side surface 140b on the other side along the extending direction of the reaction force transmitting member 140 is fixed to one end of the jack 60.

The reaction force transmission member 170 is fixed to the rail 10 and transmits the reaction force R1 transmitted via the reaction force transmission member 140 to the rail 10. The reaction force transmitting member 170 is provided for each rail 10 as described above. For example, the reaction force transmission member 170 is fixed to the rail 10 so that the outer portion 171 of the reaction force transmission member 170 comes into contact with the side surface 140a on one side of the reaction force transmission member 140.

As described above, the pressing force transmitting member 150 is a member provided between the jack 60 and the crane 20 to transmit the pressing force F1 to the pair of wheel covers 23. Specifically, the pressing force transmitting member 150 includes an extending portion 151 and a protruding portion 152. For example, the side surface 151a on one side of the extending portion 151 along the extending direction faces the other end portion of the jack 60. Further, the tip portions of the protruding portions 152 face each of the pair of wheel covers 23 arranged in the parallel direction of the rails 10.

As shown in FIG. 23, for example, the protruding portion 152 of the pressing force transmitting member 150 faces the side end portion on the opposite side of the clamp 30 side of the pair of wheel covers 23 on the opposite side to the clamp 30 side. do. The protruding portion 152 of the pressing force transmitting member 150 may face the side end portion on the clamp 30 side of the pair of wheel covers 23 on the opposite side to the clamp 30 side. Further, the protruding portion 152 of the pressing force transmitting member 150 may face the side end portion on the opposite side of the pair of wheel covers 23 on the clamp 30 side with respect to the clamp 30 side. Further, the protruding portion 152 of the pressing force transmitting member 150 may face the side end portion on the clamp 30 side of the pair of wheel covers 23 on the clamp 30 side.

As described above, the positions of the pair of wheel covers 23 that receive the pressing force F1 in the crane 20 and the positions where the pressing force F1 is input in the pair of wheel covers 23 are not limited to the example shown in FIG. The positional relationship between the jack 60, the reaction force transmission member 170, the reaction force transmission member 140, the push pressure transmission member 150, and the crane 20 and the shape of each member are the crane 20 of the pair of wheel covers 23 that receive the push pressure F1. Can be appropriately changed depending on the position in the above position and the position where the pressing force F1 is input to the pair of wheel covers 23. Further, the direction of the pressing force F1 input to the pair of wheel covers 23 may be the extending direction of the rail 10, and is not limited to the example shown in FIG. 23.

The pressing force F1 generated by the jack 60 is input to the pressing force transmitting member 150 from the other end of the jack 60, and is distributed and transmitted to each side end of the pair of wheel covers 23 via the pressing force transmitting member 150. NS. On the other hand, the reaction force R1 of the pressing force F1 generated by the jack 60 is input to the reaction force transmission member 140 from one end of the jack 60, and is distributed and transmitted to each reaction force transmission member 170 via the reaction force transmission member 140. NS. Here, since the reaction force transmission member 170 is fixed to the rail 10, the reaction force R1 distributed and transmitted to each reaction force transmission member 170 is transmitted to the rail 10. As described above, a plurality of reaction force transmitting members may be provided between the rail 10 and the jack 60. Even in that case, the reaction force R1 of the pressing force F1 is transmitted to the rail 10 by the plurality of reaction force transmitting members.

In the braking test device 7 according to this application example, a pressing force transmitting member 150 is provided between the jack 60 and the crane 20. Further, the pressing force transmitting member 150 has an extending portion 151 extending in the parallel direction of the rails 10 between the pair of rails 10 and a protruding portion protruding from both ends of the extending portion 151 toward the crane 20 side. It is equipped with 152. As a result, similarly to the braking test device 4 described above, it is possible to prevent the crane 20 from becoming unstable when the pressing force F1 is applied to the crane 20 due to being pushed and moved by the moment around the vertical axis. .. Therefore, according to this application example, the pressing force F1 can be more appropriately applied to the crane 20 in the extending direction of the rail 10. Therefore, the evaluation accuracy of the braking force by the clamp 30 can be further improved.

Similar to the braking test device 5 described above, a member other than the member shown in FIG. 23 is formed around the jack 60 in the braking test device 7 in order to further improve the evaluation accuracy of the braking force by the clamp 30. Further may be provided. FIG. 24 is an enlarged front view showing an example of the configuration around the jack 60 in the braking test device 7 according to the present application example.

The braking test device 7 may further include, for example, a support member 130. The pressing force transmitting member 150 can be movably supported by the supporting member 130 in the extending direction of the rail 10. The pressing force transmitting member 150 itself may be in sliding contact with the rail 10, and in that case, the supporting member 130 is omitted from the configuration of the braking test device 7.

Further, in the above, as a second application example, an example in which the portion of the crane 20 to which the pressing force F1 is transmitted is the wheel cover 23 has been described, but the portion of the crane 20 to which the pressing force F1 is transmitted is not particularly limited. .. For example, the portion of the crane 20 to which the pressing force F1 is transmitted may be the anchor plate 24.

<6. Conclusion>
As described above, according to the braking test device 1 according to the first embodiment, the reaction force R1 of the pressing force F1 by the jack 60 is formed between the inner portion 41 of the anchor hole 40 and the jack 60. A reaction force transmitting member 70 for transmitting to is provided. As a result, it is realized that the jack 60 applies a pressing force F1 to the crane 20 in the extending direction of the rail 10. Therefore, in the braking test using the braking test device 1 according to the first embodiment, the state around the clamp 30 can be brought closer to the actual usage state, for example, as compared with the above-mentioned comparative example. Therefore, it is possible to prevent the upper limit of the braking force due to the clamp 30 from being different from the actual usage state. Therefore, the braking force due to the clamp 30 can be evaluated with high accuracy.

Further, according to the braking test device 5 according to the second embodiment, the reaction force transmission member 170 that transmits the reaction force R1 of the pressing force F1 generated by the jack 60 to the rail 10 is fixed to the rail 10. As a result, it is realized that the jack 60 applies a pressing force F1 to the crane 20 in the extending direction of the rail 10. Therefore, in the braking test using the braking test device 5 according to the second embodiment, as in the braking test using the braking test device 1 according to the first embodiment, for example, in comparison with the above-mentioned comparative example, The state around the clamp 30 can be brought closer to the actual usage state. Therefore, it is possible to prevent the upper limit of the braking force due to the clamp 30 from being different from the actual usage state. Therefore, the braking force due to the clamp 30 can be evaluated with high accuracy. In particular, regarding the braking test using the braking test device 5, the braking test can be performed even when there are no recesses or protrusions on the surface to which the rail 10 is fixed around the crane 20.

Although the preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited to these examples. It is clear that a person having ordinary knowledge in the field of technology to which the present invention belongs can come up with various modifications or applications within the scope of the technical ideas described in the claims. , These are also naturally understood to belong to the technical scope of the present invention.

1,2,3,4,5,6,7 Braking test device 10 Rail 20 Crane 21 Frame part 22 Wheel 23 Wheel cover 24 Anchor plate 30 Clamp 31 Main body part 32 Wheel 33 Grip part 40 Anchor hole 50 End stopper 60 Jack 70 , 140, 170 Reaction force transmission member 80 Fastening part 110 Regulator member 120, 220, 150 Push pressure transmission member 130 Support member

Claims (9)

With rails
A structure that moves on the rail and
With the clamp fastened to the structure
A recessed recess or a convex protrusion on the surface to which the rail is fixed,
A pressing device that applies pressing force to the structure in the extending direction of the rail, and
A reaction force transmitting member provided between the side portion of the concave portion or the convex portion and the pressing device and transmitting the reaction force of the pressing force to the concave portion or the convex portion.
With
A braking test device used for a braking test for evaluating a braking force generated when the rail is gripped by the clamp. A regulating member for regulating the fall of the reaction force transmitting member due to the reaction force of the pressing force is provided.
The braking test apparatus according to claim 1. With rails
A structure that moves on the rail and
With the clamp fastened to the structure
A pressing device that applies pressing force to the structure in the extending direction of the rail, and
A reaction force transmission member fixed to the rail and transmitting the reaction force of the pressing force to the rail,
With
A braking test device used for a braking test for evaluating a braking force generated when the rail is gripped by the clamp. A pressing force transmitting member provided between the pressing device and the structure and transmitting the pressing force to the structure is provided.
The braking test apparatus according to any one of claims 1 to 3. The pressing force transmitting member can move in the extending direction of the rail.
The braking test apparatus according to claim 4. A support member that movably supports the push pressure transmission member in the extending direction of the rail is provided.
The braking test apparatus according to claim 5. The structure moves on a pair of rails arranged side by side at intervals.
The clamp is provided for each of the pair of rails.
The pressing force transmitting member includes an extending portion extending in the parallel direction of the rails between the pair of rails, and a protruding portion protruding from both ends of the extending portion toward the structure. Prepare, prepare
The braking test apparatus according to any one of claims 4 to 6. The reaction of the pressing force applied by the pressing device to the structure moving on the rail between the side portion of the concave portion or the convex convex portion recessed in the surface to which the rail is fixed and the pressing device. A preparatory step of providing a reaction force transmitting member for transmitting a force to the concave portion or the convex portion, and
A gripping step of gripping the rail with a predetermined gripping force by a clamp fastened to the structure.
A pressing step of applying a reference pressing force to the structure in the extending direction of the rail by the pressing device.
A determination step of determining whether or not the braking force generated by gripping the rail by the clamp is equal to or greater than the reference braking force, depending on whether or not the structure has moved on the rail.
Including
A braking test method for performing a braking test for evaluating the braking force. A preparatory step of fixing a reaction force transmitting member that transmits the reaction force of the pressing force applied to the structure moving on the rail by the pressing device to the rail, and
A gripping step of gripping the rail with a predetermined gripping force by a clamp fastened to the structure.
A pressing step of applying a reference pressing force to the structure in the extending direction of the rail by the pressing device.
A determination step of determining whether or not the braking force generated by gripping the rail by the clamp is equal to or greater than the reference braking force, depending on whether or not the structure has moved on the rail.
Including
A braking test method for performing a braking test for evaluating the braking force.

Images