Stand-type stopper and transport cart

Abstract

To provide a stand type stopper and a conveying truck which improve safety by virtue of compact design and can reduce a manufacturing cost owing to small number of components.SOLUTION: A stand type stopper includes: a connection part 6; a stand 5 having a pair of leg parts 50, 50 which are freely rotatably supported by a first rotary shaft 1 provided between lateral parts 60, 60 and a tip part 51 which connects them, and connecting the tip part 51 and a grounding part 54 opposite to each other; and a stand lock member 7 enabling the stand 5 to get into a standing state and freely rotatably supported by a second rotary shaft 2 provided between the lateral parts 60, 60 of the connection part 6, can be abutted onto the first rotary shaft 1 from below upon rotation of the stand 5 by a first elastomer 3 which connects the connection part 6 and the stand 5, can be brought into pressure contact with the stand 5 by a second elastomer 4 which connects the connection part 6 and the stand lock member 7, and can freely select the standing state or a horizontal state by the stand lock member 7 being brought into pressure contact with or separated from the stand 5.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a stand-type stopper that can be placed on a road surface to fix a transport vehicle, and to a transport vehicle for which the stopper is suitable. [Background technology]

[0002] A conventional stand mechanism for a cart disclosed in Patent Document 1 below has a hand support 4 attached to the rear end of a cart that can travel on front wheels 5b and rear wheels 5a, and a stand 18 that can lift the rear wheels is rotatably attached to the rear end. A locking mechanism is also attached to the stand mechanism and is supported by the stand 18. When the cart is stopped, the tension of the lock spring 38 keeps the locking hole 35 and the protruding rod 18b in a stopped state and locked, and when the pedal 30 is stepped on, the locking between the locking hole 35 and the protruding rod 18b is released, allowing the cart to travel.

[0003] Furthermore, the floor lock disclosed in Patent Document 2 below is a floor lock in which the stand portion 3 extends when the lock pedal lever 4 is operated, and the stand portion 3 is displaced in the shortening direction when the lock release pedal lever 5 is operated. The stroke of the lock release pedal lever 5 is made small, and the lock pedal lever 4 is formed in a roughly L-shape so that it does not intersect with the lock pedal lever 4 when the lock release pedal lever 5 is operated, preventing fingers or objects from being pinched tightly when the lock is released. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-195250 [Patent Document 2] Japanese Patent Application Laid-Open No. 2011-5958 Summary of the Invention [Problem to be solved by the invention]

[0005] The stand mechanism of Patent Document 1 has a large number of parts and is expensive to manufacture. Furthermore, because it has guide members attached to both sides of the dolly, it cannot be attached to a dolly if the width of the dolly and the width of the guide members differ. Furthermore, it is neither lightweight nor compact, and safety is an issue if the lock spring 38 or the claw 33 is located on the outside of the dolly.

[0006] The floor lock in Patent Document 2 is lighter and more compact than the stand mechanism in Patent Document 1, but the large number of parts makes it expensive to manufacture. Furthermore, the complex mechanism makes it difficult to maintain. Furthermore, when attached to a transport vehicle, the short distance to the ground surface can cause it to get caught on uneven surfaces while in motion, or the diameter of the wheels attached to the transport vehicle can prevent it from making contact with the ground, making it ineffective. These are issues that need to be resolved.

[0007] Therefore, the object of the present invention is to provide a stand-type stopper and a transport cart that are compact and safe, can be placed on the road surface to secure the transport cart, have a reduced number of parts to reduce manufacturing costs, and can be easily used on various transport carts. [Means for solving the problem]

[0008] As a means for solving the above problem, the invention described in claim 1 comprises a connecting portion 6, a stand (5) that is rotatably supported by a first rotation shaft (1) provided between side portions (60), (60) of the connecting portion (6) and that connects a tip portion (51) and a ground portion (54) facing each other; The second rotary shaft 2 is rotatably supported by the side portions 60, 60 of the connecting portion 6. The stand 5 is brought into an upright state. The tip 51 of the stand 7 is pressed against the notch 71 formed as shown in FIG. Possible Na Stand locking member 7 and Equipped with The connecting portion 6 and The aforementioned Stand 5 and The first elastic body 3 that connects However, Stand 5 ofThe connecting portion 6 is configured to be able to contact the first rotating shaft 1 from below when rotating. The aforementioned Stand locking member 7 and The second elastic body 4 connects The stand lock member 7 Can be pressure welded to stand 5 It is considered a state, The stand lock member 7 The tip portion 51 of the stand 5 is fitted into the notch portion 71 formed in the Pressure welding By doing so, the stand 5 can be maintained in an upright state, and the tip 51 of the stand 5 can be separation By doing When the stand 5 is in the upright state from Horizontal position to have a structure that can transition to It is characterized by being configured

[0009] In the invention described in claim 2, when the stand 5 having a pair of legs 50, 50 arranged on the left and right and a tip portion 51 connecting the pair of legs 50, 50 is rotated around the first rotation axis 1, the first elastic body 3 is extended, and the tip portion 51 of the stand 5 and the stand locking member 7 come into contact with each other, while the second elastic body 4 is extended, and the stand locking member 7 is rotated around the second rotation axis 2; When the tip end 51 of the stand 5 passes over the dead point P of the stand locking member 7, the stand 5 is brought into an upright state, and the stand locking member 7 presses against the tip end 51 of the stand 5, thereby maintaining the stand 5 in an upright state. The stand-type stopper described in claim 1 is characterized in that the stand 5 can be freely moved to a horizontal position by rotating the stand locking member 7 around the second rotation axis 2 from the upright state of the stand 5 and moving it away from the stand 5.

[0010] The invention described in claim 3 is a stand-type stopper described in claim 1 or 2, characterized in that the stand locking member 7, the first elastic body 3, and the second elastic body 4 are provided between a pair of legs 50, 50 of the stand 5.

[0011] The invention as set forth in claim 4 is a transporting cart 9A (9B) characterized by comprising the stand-type stopper as set forth in any one of claims 1 to 3. [Effects of the Invention]

[0012] The stand-type stopper of the present invention allows the stand to be placed in an upright or horizontal position using only the stand locking member, reducing the number of parts and achieving lower manufacturing costs. Furthermore, the simplified stopper mechanism improves maintainability, and its compact size means it does not protrude beyond the transport vehicle, contributing to improved safety. Furthermore, by slightly lifting the rear of the transport cart, this stand-type stopper can prevent the transport cart from moving or allow it to move, regardless of the diameter of the wheels of the transport cart, and can also prevent the transport cart from moving or allow it to move even if the transport cart has crawlers instead of wheels. In addition, the height from the road surface is sufficient, allowing the transport vehicle to move smoothly without getting caught on uneven surfaces compared to conventional products. Also, the elastic body between the pair of legs improves safety compared to conventional products. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 1 is a perspective view showing a stand-type stopper of the present invention. [Figure 2] FIG. 2 is an exploded perspective view of the stand-type stopper of FIG. 1. [Figure 3] 1A is a plan view of the stand-type stopper, FIG. 1B is a front view of the same, FIG. 1C is a bottom view of the same, FIG. 1D is a left side view of the same, and FIG. 1E is a right side view of the same. [Figure 4] 10(A) to 10(D) are front views showing the transition of the stand-type stopper from a horizontal state to an upright state. [Figure 5] 1A is an explanatory diagram of a stand-type stopper in an upright position, and FIG. 1B is an explanatory diagram showing the transition of the same stopper to a horizontal position. [Figure 6] FIG. 10 is a perspective view showing an embodiment (upright state) in which a stand-type stopper is applied to a caster-type transport platform. [Figure 7]7A is an explanatory diagram showing a horizontal state of the stand-type stopper of the caster-type transport platform vehicle of FIG. 6, and FIG. 7B is an explanatory diagram showing the stand-type stopper in an upright state. [Figure 8] FIG. 10 is a perspective view showing an embodiment (standing state) in which a stand-type stopper is applied to a crawler-type transport vehicle. [Figure 9] 9(A) is an explanatory diagram showing a horizontal state of the stand-type stopper of the crawler transport vehicle of FIG. 8, and FIG. 9(B) is an explanatory diagram showing the stand-type stopper in an upright state. DETAILED DESCRIPTION OF THE INVENTION

[0014] The stand-type stopper and the transport cart of the present invention will be described below with reference to the drawings. This stand-type stopper is preferably attached to the transporting carriages 9A, 9B as shown in Figures 6 to 9, and is used to fix the transporting carriages 9A, 9B that are placed on the road surface as needed. 1 to 3, the stand-type stopper is composed of a connecting part 6, a stand 5, a stand locking member 7, a first elastic body 3 (tension spring), a second elastic body 4 (tension spring), a bolt 10 and a nut 11 that form the first rotating shaft 1, and a bolt 20 and a nut 21 that form the second rotating shaft 2. The connecting part 6, the stand 5, and the stand locking member 7 are preferably made of metal, but non-metallic materials such as synthetic resin or ceramic can also be selected depending on the application.

[0015] The connecting portion 6 is formed by a horizontal portion 66 having two forward elongated holes 65, 65 into which the front portion (left side in FIG. 2 ) of a stand-locking member 7 (described later) is inserted from above, a pair of vertical side portions 60, 60 disposed on the left and right of the horizontal portion 66, and angled rising portions 64 rising upward at the front and rear of the side portions 60, 60. A gap 67 for rotatably supporting the stand-locking member 7 is provided between the horizontal portion 66, the pair of side portions 60, 60, and the rear rising portions 64, 64. A hole 61 through which the first rotating shaft 1 (bolt 10) is inserted is provided below each side portion 60, and a hole 62 through which the second rotating shaft 2 (bolt 20) is inserted is provided above the hole 61. In other words, the second rotating shaft 2 is located above the first rotating shaft 1. Further, a hole 63 is provided below the center of the rear rising portion 64, into which a fixing bolt 8 for fixing the upper ends of the elastic bodies 3, 4 is attached.

[0016] The stand 5 is made up of a pair of legs 50, 50 rotatably supported by a first rotation shaft 1 provided between the side portions 60, 60 of the connecting portion 6 and spaced apart in the left-right direction, a tip portion 51 connecting the pair of legs 50, 50 at the front, a ground portion 54 connecting the pair of legs 50, 50 at the rear, and a flat connecting portion 52 having a hole 53 formed therein to reinforce the stand 5 and to allow rotation around the first rotation shaft 1. In other words, the tip portion 51 and the ground portion 54 of the stand 5 are connected opposite each other. Although the legs 50, 50 of the stand 5 are Z-shaped when viewed from the front (see FIG. 4), they do not necessarily have to be Z-shaped and may be, for example, shaped like an eight. Furthermore, the legs 50, the grounding portion 54, the tip portion 51 and the connecting portion 52 of the stand 5 are joined by welding, but the four may also be formed as a single unit.

[0017] The stand locking member 7 can place the stand 5 in an upright position and is rotatably supported by a second rotation shaft 2 provided between the side portions 60 of the connecting portion 6. In this embodiment, a pair of side portions 73, 73 having an overall mountain-like shape have holes 70 formed in the approximate centers thereof, and a notch 71 is formed on the inside of a vertical portion 74 hanging down at the front of each side portion 73. While the notch 71 is formed as a rectangular recess, it may also be an arc-shaped recess that matches the tip portion 51 of the stand 5, or it can fulfill its role of preventing the stand 5 from being in a horizontal position even without the notch 71. In addition, a release portion 72 with an inclined surface is formed at the rear of the stand locking member 7, spanning the lower ends of the pair of side portions 73, 73.

[0018] Thus, in a state in which the vertical portion 74 and the release portion 72 of the stand-locking member 7 are inserted from above into and cover the elongated hole portion 65 and the gap portion 67 of the connecting portion 6, a bolt 20 forming the second rotation axis 2 is inserted through the hole portion 70 of the stand-locking member 7 and the upper hole portion 62 of the connecting portion 6, which is at the same horizontal position as the hole portion 70, and fixed with a nut 21. On the other hand, the stand 5 arranged below the stand-locking member 7 has a bolt 10 forming the first rotation axis 1 inserted through a sleeve 12 into the lower hole portion 61 of the connecting portion 6, which is at the same horizontal position as the hole portion 53, and is also fixed with a nut 11 via a sleeve 12 on the opposite side. The first elastic body 3, which is made of a relatively long tension spring, has its upper end attached to the fixing bolt 8 of the connecting part 6, and its lower end attached to the inner end of the tip part 51 of the stand 5 (see FIG. 3B). Next, the second elastic body 4, which is made of a relatively short tension spring, has its upper end attached to the outer end of the fixing bolt 8 of the connecting part 6 (see FIG. 4), and its lower end attached to the inner end of the release part 52 of the stand lock member 7. In addition, the second elastic body 4 may have one end attached to the inner end of the fixing bolt 8 and the other end attached to a flat portion extending across the front upper end portions of the pair of side portions 73, 73, and may be configured to be able to constantly abut against the second rotating shaft 2 from below.

[0019] Therefore, the stand locking member 7, the first elastic body 3, and the second elastic body 4 are present between the pair of legs 50, 50 of the stand 5, thereby achieving compactness and ensuring safety. The first elastic body 3, which connects the connecting part 6 and the stand 5 and is biased so that the stand 5 is always in a horizontal position, allows the stand 5 to abut against the first rotation shaft 1 from below when the stand 5 rotates, and the second elastic body 4, which connects the connecting part 6 and the stand locking member 7, biases the stand 5 so that it can be pressed against it, causing the stand locking member 7 to be pressed against or separated from the stand 5, allowing the stand 5 to be freely in an upright or horizontal position.

[0020] The transition of the stand 5 from the horizontal state to the upright state will be described in detail with reference to FIG. The stand 5 shown in Fig. 4A is rotated around the first rotation axis 1 (clockwise) so that the first elastic body 3 extends. As a result, the tip 51 of the stand 5 abuts against the stand locking member 7 (Fig. 4B). The stand 5 further rotates around the first rotation axis 1 in the direction in which the first elastic body 3 extends, and the first elastic body 3 abuts against the first rotation axis 1 from below. At the same time, while the tip 51 of the stand 5 abuts against the stand locking member 7, the stand locking member 7 is pushed by the stand 5 and rotates around the second rotation axis 2 (clockwise) in the direction in which the second elastic body 4 extends. Eventually, as shown in Fig. 4C, the stand locking member 7 reaches dead point P, and when the tip 51 of the stand 5 passes over dead point P, the contraction force of the second elastic body 4 causes the stand locking member 7 to rotate around the second rotation axis 2 (counterclockwise) in the direction in which the second elastic body 4 contracts, and the stand 5 enters an upright state as shown in Fig. 4D. At this time, the tip 51 of the stand 5 presses against the notch 71 of the stand locking member 7, making the upright state of the stand 5 even more secure.

[0021] When the stand 5 is to be changed from an upright state to a horizontal state, as shown in FIG. 5A , even if the stand 5 is rotated around the first rotation axis 1 (counterclockwise) in direction K to change the stand 5 to a horizontal state, the stand-locking member 7 does not separate from the stand 5, and the notched portion 71 of the stand-locking member 7 bites into and presses against the tip 51 of the stand 5, so the stand 5 continues to maintain the upright state. This is because the second elastic body 4 has not fully contracted, and the contractile force in the direction indicated by the symbol S (counterclockwise) in FIG. 5A allows the stand-locking member 7 to bite into or press against the tip 51 of the stand 5. In other words, the stand-locking member 7 assumes a position that prevents the stand 5 from becoming horizontal, thereby preventing the stand 5 from transitioning from an upright state to a horizontal state. Therefore, in order to change the stand 5 from an upright state to a horizontal state, the stand-locking member 7 must be moved away from the stand 5 so that it is not blocked by the stand-locking member 7.

[0022] That is, to prevent the stand-locking member 7 from blocking the rotation of the stand 5, an external force F is applied to the release portion 72 of the stand-locking member 7 as shown in FIG. 5B . Then, the stand-locking member 7 rotates around the second rotation axis 2 (counterclockwise) in a direction T away from the stand 5 while the second elastic body 4 expands. Then, since the stand-locking member 7 is no longer in pressure contact with the tip 51 of the stand 5, the compressive force of the first elastic body 3 causes the stand 5 to rotate around the first rotation axis 1 in a direction that makes the stand 5 horizontal, transitioning from an upright state to a horizontal state. Meanwhile, when the external force F is removed, the contraction force of the second elastic body 4 causes the stand-locking member 7 to rotate around the second rotation axis 2 in a direction that contracts the second elastic body 4.

[0023] 6 to 9 show transporting carriages 9A, 9B equipped with the stand-type stopper described above, and by attaching the stopper to such transporting carriages 9A, 9B, it serves as a stopper for the transporting carriages 9A, 9B. In addition, the transporting carriage can be either the transporting carriage 9A with casters 90 shown in Fig. 6 or the transporting carriage 9B with crawlers 93 shown in Fig. 8, and can be used regardless of the diameter of the casters 90. In this embodiment, the stand-type stopper and the transport carts 9A and 9B are fixed to each other by bolting to the top plate 91 of the transport carts 9A and 9B or by using mounting brackets 92 to the transport cart bodies 9A and 9B, but they may also be joined by welding. The transport vehicles 9A and 9B can travel when the stand 5 shown in Figures 7A and 9A is in a horizontal state. On the other hand, when the stand 5 shown in Figures 7B and 9B is in an upright state, the ground contact portion 54 of the stand 5 touches the road surface G and the rear parts of the transport vehicles 9A and 9B are slightly raised, so that the two rear wheels of the casters 90 or the rear parts of the crawlers 93 do not touch the ground, thereby fixing the transport vehicles 9A and 9B and preventing the transport vehicles 9A and 9B from traveling. The stand-type stoppers described above can be attached to the transport vehicles 9A and 9B later, and there is no need to separately install stopper mechanisms for the casters 90 and crawlers 93.

[0024] Although the embodiments have been described above based on the drawings, it should be emphasized that the present invention is not limited to the illustrated examples, and includes the range of design modifications and application variations that would normally be made by a person skilled in the art, provided that they do not deviate from the technical concept of the present invention. [Explanation of symbols]

[0025] 1 First rotation axis 10 volts 11 Nut 12 sleeves 2 Second rotation axis 20 volts 21 Nut 3 First Elastic Body 4 Second Elastic Body 5 Stand 50 Legs 51 Tip 53 Hole 54 Grounding part 6 Connecting part 60 Side 63 Hole 65 Long hole part 66 Horizontal section 67 Cavity 7 Stand locking member 71 Notch 72 Release section 73 Side 74 Vertical section 8 Fixing bolts P Dead point 9A, 9B transport cart

Claims

1. A connecting portion; a stand that is rotatably supported by a first rotation shaft provided between the side portions of the connecting portion and that connects the tip portion and the ground portion in opposing positions; a stand locking member that is rotatably supported by a second rotation shaft provided between the side portions of the connecting portion, and that can press a tip end of the stand into a notch formed in the stand to keep the stand in an upright state; a first elastic body connecting the connecting portion and the stand is configured to be able to contact the first rotation shaft from below when the stand rotates, and a second elastic body connecting the connecting portion and the stand locking member makes the stand locking member able to be pressed against the stand; A stand-type stopper characterized by being configured to have a structure that allows the stand to be maintained in an upright state by pressing the tip of the stand against the notch formed in the stand lock member, and to have a structure that allows the stand to transition from the upright state to a horizontal state by moving the tip of the stand away from the notch.

2. When the stand, which has a pair of legs arranged on the left and right and a tip portion connecting the pair of legs, is rotated around the first rotation axis, the first elastic body is stretched, and the tip portion of the stand and the stand locking member come into contact with each other, while the second elastic body is stretched, and the stand locking member is rotated around the second rotation axis, When the tip of the stand passes over the dead point of the stand locking member, the stand is brought into an upright state, and the stand locking member is pressed against the tip of the stand, thereby maintaining the upright state of the stand; 2. The stand-type stopper according to claim 1, wherein the stand can be freely moved to a horizontal position by rotating the stand locking member about the second rotation axis from the upright position of the stand to move it away from the stand.

3. 3. The stand-type stopper according to claim 1, wherein the stand locking member, the first elastic body, and the second elastic body are provided between a pair of legs of the stand.

4. A transport vehicle comprising the stand-type stopper according to any one of claims 1 to 3.

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