Trolley stop device

Abstract

The present invention provides a trolley stopping device that can easily temporarily restrict the movement of a trolley when suspending luggage from it. [Solution] The trolley 20 includes a tire 22 having a main body portion 22a and an axis 22b that contact the rail, and a frame 21 into which the axis is fitted and which surrounds the outside of the tire. The trolley 20 is provided with a circular member 30 that is coupled to the main body portion between the frame and the main body portion and rotates together with it, and a stopper member 40 that is hollow and substantially cylindrical with a tapered tip and has two substantially cylindrical elongated holes in the columnar direction at opposing positions on its side surface. The circular member has 4 to 20 circular insertion holes 31 that are evenly spaced along the inside of its outer edge, and the stopper member has through pins 43 that pass through the two elongated holes and have both ends protruding from the side surface of the stopper member, and a biasing member that is located inside the stopper member and provided between the tip of the stopper member and the through pins to bias the through pins toward the rear end of the elongated holes, and the through pins are held outside the frame.

Description

Technical Field

[0001] The present invention relates to a device for stopping and holding the movement of a trolley installed at a construction site for transporting goods such as materials.

Background Art

[0002] At a construction site, a trolley may be used to lift and move goods such as materials. At that time, trolley rails are assembled using, for example, aluminum H-shaped steel (see, for example, Patent Document 1). FIG. 4 is a side view of a general trolley. H-shaped steel is used as the trolley rail 110, and the H-shaped steel has flanges 110a and 110b arranged vertically, and the carriage 120 of the trolley 100 is installed so as to rest on the upper surface of the upper flange 110a. The goods are hung on a suspension member 130 connected to the carriage 120 and suspended in the space below the trolley rail 110.

[0003] When using such a trolley 100, since the weight of the goods to be lifted is large, it is desirable that the tires 125 contacting the trolley rail 110 have a structure that can rotate as smoothly as possible. However, if it is made too smooth, the trolley 100 will move when lifting the goods, resulting in the drawback that it becomes difficult to safely lift the goods.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In view of such circumstances, an object of the present invention is to provide a trolley stopping device that can temporarily stop the movement of a trolley when lifting goods.

Means for Solving the Problems

[0006] The trolley stopping device of this invention is provided on a trolley that comprises a tire having a main body portion and an axle that contact the rail, and a frame into which the axle is fitted and which surrounds the outside of the tire, and has a circular member that is coupled to the main body portion and rotates together with it between the frame and the main body portion, and a stopper member that is hollow and substantially cylindrical in shape with a tapered tip and has two substantially cylindrical elongated holes in the columnar direction at opposing positions on its side, the circular member has 4 to 20 circular insertion holes at equal intervals along the inside of its outer edge, and the stopper member has through pins that pass through the two elongated holes and have both ends protruding from the side of the stopper member, and stopper The component includes a biasing member located inside the member and positioned between the tip of the stopper member and the through-pin, which biases the through-pin toward the rear end of the elongated hole. The through-pin, which protrudes from the side of the stopper member, is held outside the frame. The frame is provided with a notch so that when the through-pin is brought into contact with the tip of the elongated hole in resistance to the biasing force of the biasing member, the stopper member can rotate around the through-pin until it is perpendicular to the frame. When the tip of the stopper member is pointed perpendicular to the frame and a biasing force is applied by the biasing member, the stopper member pierces through the notch and one of the insertion holes from its tip, thereby preventing the rotation of the circular member.

[0007] Here, it is preferable that the biasing member be a compression coil spring, and that the circular member be a guide member that prevents the trolley from coming off the rail. [Effects of the Invention]

[0008] According to this invention, by inserting the stopper member into the insertion hole of the circular member, the rotation of the circular member can be easily suppressed, thereby enabling the trolley to be stopped. Furthermore, by using the circular member as a guide member for the trolley, the trolley can be safely stopped with a simple structure. [Brief explanation of the drawing]

[0009] [Figure 1] This is a trolley positioned on rails, where (a) is a perspective view and (b) is a perspective view showing the trolley's stopping device with the frame omitted. [Figure 2] This is a trolley, where (a) is a simplified side view and (b) is a simplified side view with the frame omitted to visualize the trolley's stopping device. [Figure 3] This is a diagram illustrating the mechanism of the trolley's stopping device. [Figure 4] This is a side view of a typical trolley. [Modes for carrying out the invention]

[0010] This invention relates to a trolley stopping device installed on a trolley that travels on rails carrying materials and other cargo at a construction site, and which prevents movement when the cargo is suspended. Embodiments of this invention will be described below with reference to the attached drawings.

[0011] Figure 1 shows a trolley positioned on rails, where (a) is a perspective view and (b) is a perspective view showing the trolley's stopping device with the frame omitted. Figure 2 also shows a trolley, where (a) is a simplified side view and (b) is a simplified side view showing the trolley's stopping device with the frame omitted. Furthermore, Figure 3 is a diagram illustrating the mechanism of the trolley's stopping device.

[0012] The trolley 20 consists of a tire 22, a frame 21, and a suspension member 25. The tire 22 has a main body portion 22a that contacts the rail 50 and an axis 22b, the axis 22b being fitted into the frame 21. The frame 21 surrounds the outside of the tire 22. The suspension member 25 shown in Figures 1 and 2 has a cantilever structure, but it is not limited to a cantilever structure; any member that connects from the outside of the frame 21 to the underside of the rail 50 and can suspend a load from the underside of the rail 50 is acceptable. A shaft to which the suspension member 25 is connected is provided inside the frame 21.

[0013] The trolley stopping device 10 is a device installed on such a trolley 20, and has an insertion hole 31 in a circular member 30 that rotates together with the tire 22, and by inserting a substantially cylindrical stopper member 40 through the insertion hole 31, the rotation of the circular member 30 and the tire 22 is suppressed, and the trolley 20 is stopped.

[0014] Specifically, the circular member 30 is a member that connects to the main body portion 22a between the frame 21 and the main body portion 22a of the tire 22 and rotates together with the tire 22. The stopper member 40 is a hollow, approximately cylindrical member with a tapered tip 41, and has two approximately cylindrical elongated holes 42 at opposing positions on its side surface, running in the direction of a column.

[0015] Furthermore, the circular member 30 is provided with four to twenty circular insertion holes 31 at equal intervals along the inside of its outer edge. The size of the insertion holes 31 should be large enough for the tip 41 of the stopper member 40 to pass through, and they may be through holes or blind holes. Also, since the circular member 30 rotates, it is not predetermined which insertion hole 31 the stopper member 40 will pass through, so it is preferable that all the insertion holes 31 be the same size and that multiple holes be made along the inside of the edge of the circular member 30. However, if there are only about two holes, it is difficult to insert the stopper member 40 in one go, so it is preferable to have four or more, and if the insertion holes 31 are provided along the outer edge with almost no gaps, there will be approximately 20 holes. Therefore, the number of insertion holes 31 should be four to twenty.

[0016] Furthermore, the stopper member 40 includes a through-pin 43 that passes through the two elongated holes 42 and has both ends protruding from the side surface of the stopper member 40, and a biasing member 44 located inside the stopper member 40 and between the tip 41 of the stopper member 40 and the through-pin 43. This biasing member 44 can basically be a compression coil spring, but it may be other than a compression coil spring as long as it biases the through-pin 43 toward the rear end of the elongated hole 42.

[0017] Note that the through-pin 43 protruding from the side surface of the stopper member 40 is held by the frame 21 outside the frame 21. When the through-pin 43 is abutted against the tip side of the long hole 42 against the biasing force of the biasing member 44, the stopper member 40 can rotate about the through-pin 43 until it becomes perpendicular to the frame 21. Specifically, when the stopper member 40 is rotated about the through-pin 43, a notch 21a may be provided at a position where the vicinity of the tip 41 passes to avoid the vicinity of the tip 41 from abutting against the frame 21.

[0018] Next, the mechanism of the trolley's stopping device 10 will be described using FIG. 3. FIG. 3(a) shows the normal state in which the trolley 20 can travel. The stopper member 40 is outside the frame 21 with the tip 41 facing upward. In FIGS. 1 and 2, the stopping device 10 on the left side of the figure is in this state. At this time, since the through-pin 43 is biased toward the rear end side of the long hole 42 by the biasing member 44, even if an attempt is made to rotate the stopper member 40, the tip 41 does not pass through the notch 21a, so the stopper member 40 cannot rotate.

[0019] In FIG. 3(b), by pulling the rear end side of the stopper member 40 downward from the state of FIG. 3(a), the through-pin 43 is abutted against the tip side of the long hole 42 against the biasing force of the biasing member 44.

[0020] In FIG. 3(c), the stopper member 40 is rotated about the through-pin 43 from the state of FIG. 3(b) so that the tip 41 faces perpendicular to the frame 21. At this time, the tip 41 of the stopper member 40 passes through the notch 21a so as not to hit the frame 21.

[0021] Thus, in Fig. 3(d), when the stopper member 40 is released from the state where the tip 41 of the stopper member 40 is directed perpendicular to the frame 21 and the biasing force by the biasing member 44 is applied, the stopper member 40 comes to rest in a state where it penetrates through either the notch 21a or one of the insertion holes 31 from the tip 41. Then, since the circular member 30 is locked by the stopper member 40, the rotation of the tire 22 can be suppressed. Note that the stop device 10 on the right side in Figs. 1 and 2 shows a state where the rotation of the tire 22 is suppressed.

[0022] In addition, since the circular member 30 is coupled to the main body portion 22a of the tire 22, it can also function as a guide member that suppresses the trolley 20 from coming off the rail 50.

[0023] With a trolley stop device as described above, by penetrating the stopper member through the insertion hole of the circular member, the rotation of the circular member can be easily suppressed, and thereby the trolley can be easily stopped. Thus, work can be safely performed when suspending a load from the suspension member.

Explanation of Reference Numerals

[0024] 10 Stop device 20 Trolley 21 Frame 21a Notch 22 Tire 22a Main body portion 22b Axle center 25 Suspension member 30 Circular member 31 Insertion hole 40 Stopper member 41 Tip 42 Long hole 43 Through pin 44 Biasing member 50 Rail

Claims

1. A trolley comprising a tire having a main body portion and an axle that contact the rail, and a frame into which the axle is fitted and which surrounds the outside of the tire, is provided with The frame and the main body portion have a circular member that is connected to the main body portion and rotates together with it, and a stopper member that is hollow and has a tapered tip and a substantially cylindrical shape, with two substantially cylindrical elongated holes in the columnar direction at opposing positions on its side, The circular member is provided with four to twenty circular insertion holes at equal intervals along the inner side of its outer edge. The stopper member comprises a through pin that passes through the two elongated holes and has both ends protruding from the side surface of the stopper member, and a biasing member located inside the stopper member and provided between the tip of the stopper member and the through pin, which biases the through pin toward the rear end of the elongated hole. The through pin protruding from the side surface of the stopper member is held outside the frame, and the frame is provided with a notch so that when the through pin is brought into contact with the tip side of the elongated hole in resistance to the biasing force of the biasing member, the stopper member can rotate around the through pin until it is perpendicular to the frame. A trolley stopping device characterized in that when the tip of the stopper member is pointed perpendicular to the frame and a biasing force is applied by the biasing member, the stopper member pierces the notch and one of the insertion holes from its tip, thereby suppressing the rotation of the circular member.

2. The trolley stopping device according to claim 1, characterized in that the biasing member is a compression coil spring.

3. The trolley stopping device according to claim 1, characterized in that the circular member functions as a guide member to prevent the trolley from coming off the rail.

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