JP2013159123A - Sprag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sprag appropriate for restricting a stopped vehicle, in particular, a cropper to be loaded on a cargo bed of a carrier vehicle so as to prevent the cropper from moving.SOLUTION: A sprag is comprised of a front stopper 1 and a rear stopper 2 which are placed on a cargo bed 41 of a lightweight truck. The front stopper 1 includes a front slope 11 to be fitted from a front side of a tire 31 of a cropper 3 to a circumferential surface of the tire 31, and the rear stopper 2 includes a rear slope 21 to be fitted from a rear side of the tire 31 of the cropper 3 to the circumferential surface of the tire 31. The front stopper 1 and the rear stopper 2 restrict a positional relation between the front slope 11 and the rear slope 21 through a hook 13 which can be engaged/disengaged freely from one stopper to the other, the tire 31 of which the circumferential surface is fitted to the front slope 11 and the rear slope 21 prevents the cargo bed 41 from coming in contact with ground.

Description

  The present invention relates to a wheel stopper suitable for restraining a stopped vehicle, particularly a cultivator, to be placed on a loading platform of a transport vehicle so as not to move.

  In order to restrain the stopped vehicle so as not to move, the wheel stopper (also called hand pawl, hand scotch or chock) for inserting a block between the tire and the ground of the stopped vehicle has various configurations or structures according to the stopped vehicle. Proposed. For example, as shown in Patent Document 1, as a ring stopper, there is a structure in which rubber blocks (stoppers) having right-angled triangles in a side view are attached to both ends of a connecting lever bent in a U shape in a plan view (Patent Document). 1. See FIG. 4. The block is a wedge shape with an acute corner inserted between the cultivator's tire and the ground, and the circumferential surface facing the tire or the ground is formed into a corrugated cross section so that it does not shift due to friction with the tire or the ground. Yes.

Japanese Utility Model Publication No. 02-097145

  Conventional wheel stops are used to restrain a stopped vehicle from moving on the ground. In this case, since the stopped vehicle is stopped, there is no possibility that an external force is applied to the wheel stopper, and there is no possibility that the wheel stopper is displaced from the tire. However, in the case of a stopped vehicle (for example, a cultivator mounted on the platform of a light truck) that is placed on the platform of the transport vehicle, the block inserted between the tire and the platform may be displaced due to the vibration of the transport vehicle. There is. In this regard, the wheel stopper disclosed in Patent Document 1 is such that the blocks sandwiching the front and rear of the tire are connected by a connecting lever, so there is no risk that the block will shift in the front and rear direction of the tire. The possibility that the block will shift in the left-right direction cannot be wiped out.

  As described above, the conventional wheel stopper is premised on use on the ground without vibration, and has a surface that is difficult to use for a stop vehicle placed on the loading platform of the transport vehicle. In particular, when the stopped vehicle to be mounted on the platform of the transport vehicle is a cultivator, it is usually configured to have a rotary on either the front or the rear of the tire, and the wheel stopper is removed during transport to move the cultivator back and forth. Or if it moves to the left and right, the rotary may be damaged, or the loading platform of the transport vehicle may be damaged by the rotary. Therefore, in order to develop a wheel stopper suitable for restraining a stationary vehicle, particularly a cultivator, which cannot be moved, placed on the platform of the transport vehicle, studies were made.

  What has been developed as a result of the study is a wheel stopper that restrains the stopped vehicle placed on the carrier platform of the transport vehicle so as not to move, and is composed of a front stop portion and a rear stop portion that are placed on the carrier platform of the transport vehicle. The front stop surface has a front inclined surface that is directed from the front of the tire of the stopped vehicle to the circumferential surface of the tire, and the rear stop portion has a rear inclined surface that is directed from the rear of the tire of the stopped vehicle to the circumferential surface of the tire. The front stop portion and the rear stop portion restrain the positional relationship between the front inclined surface and the rear inclined surface by a hook that can be released from one side to the other, and the peripheral surface is directed to the front inclined surface and the rear inclined surface. This is a wheel stopper that prevents the tire from contacting the carrier.

  The wheel stopper of the present invention is particularly preferably used when a stop vehicle (for example, a cultivator mounted on a light truck bed) that is placed on a carrier bed of a vibration transport vehicle is restrained so as not to move. It may be used when the stationary vehicle is placed on the ground and restrained so that it cannot move. Since the front inclined surface and the rear inclined surface are respectively directed to the peripheral surface with the same tire interposed therebetween, they face each other in a V shape in a side view. As long as it is addressed to the peripheral surface of the tire, the front inclined surface and the rear inclined surface may be a flat surface or a curved surface having a radius equal to or larger than the radius of the tire peripheral surface. When the front inclined surface and the rear inclined surface are flat surfaces, the respective inclination angles may be equal or different. When the front inclined surface and the rear inclined surface are curved surfaces, the respective radii may be equal or different.

  The wheel stopper of the present invention does not insert the front inclined surface and the rear inclined surface into the gap between the loading platform and the tire of the transport vehicle, but stops the vehicle between the front inclined surface and the rear inclined surface whose positional relationship is restricted by the hook. The tire is always pressed against the front inclined surface and the rear inclined surface so that the front inclined surface and the rear inclined surface are misaligned. Thus, the tire can be held without being stopped, and the rotation of the tire is prevented, that is, the stopped vehicle is restrained so as not to move. If the positional relationship between the front inclined surface and the rear inclined surface can be constrained, a single hook may be provided with a highly rigid member, but in order to hold the tire stably, a plurality of hooks must be provided apart from each other across the tire. Is desirable.

  The front stop portion and the rear stop portion may be configured separately for each of the left and right tires corresponding to the left and right tires of the stopped vehicle. However, it is desirable that the left and right tires can be constrained by the integrated front and rear inclined surfaces in order to prevent displacement of the front and rear inclined surfaces due to vibration. In this case, the front stop portion is longer than the distance between the left and right tires of the stopped vehicle and has a front inclined surface that is simultaneously addressed to the peripheral surfaces of the left and right tires. Longer to the left and right than the distance between the tires, has a rear inclined surface that is addressed simultaneously to the peripheral surfaces of the left and right tires, and is inclined forward by a pair of left and right hooks provided across both ends of the front inclined surface and the rear inclined surface It becomes the structure which restrains the positional relationship of a surface and a back inclined surface.

  Since the wheel stopper of the present invention fits the tire of the stopped vehicle between the front inclined surface and the rear inclined surface in which the positional relationship is constrained, the stopped vehicle placed on the loading platform of the transport vehicle is the front inclined surface or the rear inclined surface. It is necessary to overcome one of them. From this, it is preferable that the rear stop portion is provided with a rear guide path that contacts the cargo bed and reaches the rear inclined surface from the rear. When the stopped vehicle is placed on the loading platform of the transport vehicle, a bridge is bridged from the rear edge of the loading platform toward the ground. Therefore, it is preferable that the rear guide path has an inclined surface continuous to the bridge. Similarly, when the front stop is grounded to the loading platform and provided with a front guide path from the front to the front inclined surface, the stop vehicle placed on the loading platform of the transport vehicle gets over the front inclined surface, and the front inclined surface and the rear A tire can be fitted between the inclined surfaces.

  The wheel stopper of the present invention can restrain a stopped vehicle (for example, a cultivator mounted on a light truck bed) immovable on a carrier bed of a conveyance vehicle with vibration. This restrains the positional relationship between the front inclined surface and the rear inclined surface by the hook, fits the tire of the stop vehicle between the front inclined surface and the rear inclined surface, and prevents the tire from coming into contact with the loading platform. Under the weight of the stopped vehicle, the tire presses the circumferential surface against the front inclined surface and the rear inclined surface to prevent displacement of the front inclined surface and the rear inclined surface with respect to the tire so that the tire cannot be rotated and the front inclined surface and the rear This is due to the fact that it is held on an inclined surface.

  The front inclined surface and the rear inclined surface have a length that is addressed to the peripheral surfaces of the left and right tires at the same time, and further, by providing a pair of right and left hooks, the weight of the stopped vehicle is equally received from the left and right, and the load related to the hook is unevenly distributed. As long as the tire is fitted between the two, the relative positional relationship is less likely to be lost, and the positional deviation of the front inclined surface and the rear inclined surface with respect to the tire can be stably prevented. Fully demonstrate the ability to restrain immovability. The front guideway or the rear guideway makes it easy to fit tires between the front and rear inclined surfaces over the front or rear inclined surface, and when the stopped vehicle is a cultivator, the rotary is grounded and does not move. So that the rotary or loading platform is not damaged.

It is a perspective view showing an example of a ring stopper of the present invention. It is a perspective view showing the state which isolate | separated the front stop part and the rear stop part of this example. It is a side view showing the step which places a pawl on the loading platform of a light truck, and places a cultivator on the loading platform. It is a side view showing the step which advances the cultivator along the guide way of a back stop part. It is the side view showing the step which fitted the tire of the cultivator in the opposing space of the front slope of a front stop part, and the back slope of a back stop part. It is a side view showing the stage which grounded the rotary of the cultivator to the guide way of a back stop part. It is the side view showing the stage which removed the back stop part first in order to lower a cultivator from the loading platform of a light truck.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the ring stopper of the present invention is composed of a front stopper portion 1 and a rear stopper portion 2 connected by a hook 13. The hook 13 is a metal bar having a hook formed at the tip, and one hook is attached to each of the left side surface and the right side surface of the front inclined surface 11 of the front stopper 1 so as to be paired on the left and right sides. The hook 13 faces the rear stop 2 and the hook 13 is engaged with either the upper rear hook receiver 23 or the lower rear hook receiver 24 provided on the outer surface of the rear inclined surface 21 of the rear stopper 2 to The stopper 1 and the rear stopper 2 are connected, reversed, and the hook is engaged with the front hook receiver 14 to separate the front stopper 1 and the rear stopper 2 (see FIG. 2). The upper rear hook receiver 23 or the lower rear hook receiver 24 has a different position in the front-rear direction with respect to the hook 13, and the distance between the front inclined surface 11 and the rear inclined surface 21 can be increased by selectively engaging the hook 13. Adjust in two steps.

  The front stop 1 is a front inclined surface 11 which is a wooden plate which is longer than the distance between the left and right tires 31 of the cultivator 3 (stopped vehicle, see FIG. 3 and below) and is simultaneously addressed to the peripheral surfaces of the left and right tires 31. And a front connecting frame 123, which is a wooden square bar of the same length, is arranged in front of the front inclined surface 11 (left obliquely downward in FIG. 1) and is parallel to the front inclined surface 11, and the front inclined surface 11 and This is a substantially rectangular frame body in plan view formed by connecting the front inclined surface 11 and the front connection frame 123 by four front grounding frames 121 which are wooden square bars orthogonal to the front connection frame 123. The front stopper 1 that is a substantially rectangular frame in plan view is excellent in grounding stability. The front stop portion 1 of this example is entirely made of wood, but may be made of a resin member, a metal member, or a combination thereof.

  The front inclined surface 11 is stretched over the inclined rear end surfaces of the four front grounding frames 121, and has a downward slope toward the rear (in the diagonally upward right direction in FIG. 1). Further, the front connection frame 123 is stretched over the front upper ends of the four front ground frames 121 and is slightly higher than each wooden plate of the front lattice plane 122 that constitutes the front guide path 12. As a result, the front connection frame 123 integrates the four front grounding frames 121, and when the tire 31 gets over the front inclined surface 11 from the rear to the front due to the movement of the cultivator 3, the tire 31 It acts as a stopper at the front end of the front guide path 12 against.

  The front guide path 12 is a front lattice plane 122 configured by four front ground frames 121, each set of two left and right frames, and three wooden boards are laid across the front ground frames 121 of each pair at equal intervals. is there. The wheel stopper of this example moves the cultivator 3 from the rear end of the rear guide path 22 provided in the rear stop portion 2, and moves the tire 31 over the rear inclined surface 21 between the front inclined surface 11 and the rear inclined surface 21. Since it is fitted (see FIG. 5 described later), there is almost no case where the tire 31 rides on the front guide path 12. However, even in this case, in the case of the cultivator 3 having the rotary 32 in front of the tire 31, the rotary 32 is grounded and functions as a protective surface that does not damage the rotary 32 and the loading platform 41 of the light truck 4 (see FIG. 3 and subsequent figures). To do.

  The rear stop 2 is longer than the distance between the left and right tires 31 of the cultivator 3, and is located behind the rear inclined surface 21 and the rear inclined surface 21, which is a wooden board that is simultaneously addressed to the peripheral surfaces of the left and right tires 31. There is a wooden square bar (two on the inner side in the left-right direction) arranged in parallel with the rear inclined surface 21 and a rear connecting frame 223 which is a wooden square bar of the same length, and is orthogonal to the rear inclined surface 21 and the rear connecting frame 223. Alternatively, the frame is a substantially rectangular frame in plan view formed by connecting the rear inclined surface 21 and the rear connecting frame 223 by four rear grounding frames 221 that are wooden square bars and wooden boards (two on the left and right sides). . The rear stopper 2 which is a substantially rectangular frame in plan view is excellent in grounding stability. The back stop portion 2 of this example is entirely made of wood, but may be made of a resin member, a metal member, or a combination thereof.

  The rear inclined surface 21 is bridged over the inclined front end surfaces of the four rear ground frames 221 and has a downward slope toward the front. Further, the rear connection frame 223 is bridged over the vertical rear end surfaces of the four rear ground frames 221 and has a height equal to the rear end of the grid inclined surface 224 constituting the rear guide path 22. The rear connection frame 223 is integrated with four rear grounding frames 221, and the bridge 5 (see FIG. 3) hung on the rear end of the loading platform 41 of the light truck 4 and the rear guide path 22 are used for the cultivator. The third tire 31 is adjusted so as to continuously extend as a rolling surface.

  The rear guide path 22 is composed of four rear ground frames 221 on the left and right, and a rear lattice plane 222 constructed by laying six wooden boards on the flat portion of each group of the rear ground frames 221. Each set is composed of a grid inclined surface 224 formed by linking two wooden boards over the inclined portion of the rear ground frame 221 of each set. In this example, the rear guide path 22 guides the tire 31 of the cultivator 3 on the grid inclined surface 224 and the rear lattice plane 222 in this order until the tire 31 gets over the rear inclined surface 21. The rear grounding frame 221 on the outer side in the left-right direction vertically stands a wooden plate on the side of the wooden square bar, abuts the end surface of the wooden plate of the rear lattice plane 222 and the lattice inclined surface 224 on the wooden plate, And the wooden board which comprises the lattice inclined surface 224 is prevented from shifting | deviating to the left-right direction.

  The wheel stopper of this example moves the cultivator 3 from the rear end of the rear guide path 22 provided in the rear stop portion 2 to the front, and moves the tire 31 over the rear inclined surface 21 to the front inclined surface 11 and the rear inclined surface. (See Fig. 5 below). As described above, the rear guide path 22 guides the tire 31 of the cultivator 3 to the space between the front inclined surface 11 and the rear inclined surface 21, and also grounds the rotary 32 behind the tire 31 so that the rotary 32 or light truck can be grounded. 4 is used as a protective surface that does not damage the loading platform 41 (see FIG. 3 and subsequent figures) (see FIG. 6 below).

  The case where the cultivator 3 is placed on the loading platform 41 of the light truck 4 and restrained so as not to move using the wheel stopper of this example will be described. First, as a preparation stage, a rubber sheet 42 is laid on the loading platform 41 of the light truck 4, and the front stopper 1 and the rear stopper 2 connected by the hook 13 hooked to the lower rear hook receiver 24 are placed on the rubber sheet 42. Put it on (see Figure 3 and below). In the unlikely event that the cultivator 3 moves away from the wheel stopper, the rubber sheet 42 protects the loading platform 41 and also acts as a slip stopper for the front stopper 1 and the rear stopper 2, and the front stopper 1 and the rear stopper by vibration. The part 2 has a function of preventing the position 2 from being displaced on the cargo bed 41 as a unit.

  The cultivator 3 is moved toward the loading platform 41 while being pushed by an operator (not shown) by using the bridge 5 spanned from the ground to the loading platform 41 of the light truck 4 from the ground. As shown in FIG. 3, the cultivator 3 that has reached the loading platform 41 moves to the rear guide path 22 of the rear stop portion 2 arranged so as to be continuous with the bridge 5, and as shown in FIG. 4, (Not shown) advances the rear guide path 22 forward (FIG. 3 and below, leftward). At this time, since the rear guide path 22 of this example is provided with a grid inclined surface 224 on the rear side (FIG. 3 and below, rightward), it is easy to transfer the tire 31 of the cultivator 3 following the bridge 5.

  In the rear stop portion 2 of this example, the upper edge of the rear inclined surface 21 and the copying upper surface of the rear guide path 22 (virtual surface on which the planes of the wooden plates constituting the rear lattice surface 222 are aligned) are substantially the same height. Therefore, as shown in FIG. 5, the tire 31 of the cultivator 3 gets over the rear inclined surface 21 without difficulty and fits between the front inclined surface 11 and the rear inclined surface 21. At this time, the tire 31 that presses the circumferential surface tries to spread the front inclined surface 11 and the rear inclined surface 21 away from each other (the front inclined surface 11 forward and the rear inclined surface 21 rearward). Since the 1 and the rear stop 2 are connected by the hook 13, the front inclined surface 11 and the rear inclined surface 21 are not separated. In this manner, the tire 31 is held on the front inclined surface 11 and the rear inclined surface 21 without floating and grounding from the cargo bed 41 (in this example, the rubber sheet 42) by a gap Δ.

  After the tire 31 is dropped between the front stop 1 and the rear stop 2 in this way, when the operator leaves the cultivator 3, the rotary 32 is lowered and contacts the rear guide path 22 as seen in FIG. The wheel stopper of the present example constitutes the rear guide path 22 from the rear lattice plane 222 on which the wooden plates are arranged, so that the rotary 32 is supported away from the loading platform 41, and the blade of the rotary 32 is supported on the wooden plate. It also has a function of preventing the rotary 32 from being displaced from the rear guide path 22 by being bitten. Thus, the wheel stopper of this example holds the tire 31 by the front inclined surface 11 and the rear inclined surface 21, and further causes the rotary 32 to be engaged with the rear guide path 22 so that the cultivator 3 can be moved on the loading platform 41 of the light truck 4. Restrained to move.

  When the cultivator 3 is lowered from the loading platform 41, the cultivator 3 may be moved over the rear inclined surface 21 and moved rearward along the rear guide path 22 to be guided to the bridge 5 (see FIG. 3). However, as seen in FIG. 7, the hook 13 that connects the front stopper 1 and the rear stopper 2 is removed from the lower rear hook receiver 24 (see FIG. 6) of the rear stopper 2 and in front of the front stopper 1. It is no longer necessary to get over the rear inclined surface 21 by re-engaging the hook catch 14, releasing the connection of the front stop 1 and the rear stop 2, and removing the rear stop 2 from the loading platform 41 and then lowering the cultivator 3 backward. The cultivator 3 can be easily moved backward and guided to the bridge 5 (see FIG. 3).

1 Front stop
11 Front inclined surface
12 Front guideway
13 Hook
14 Front hook receiver 2 Rear stop
21 Rear inclined surface
22 Back guideway
23 Upper rear hook receiver
24 Lower hook receiver 3 Cultivator (stopped vehicle)
31 tires
32 Rotary 4 Light truck (Conveyor vehicle)
41 Loading platform
42 Rubber sheet 5 Bridge Δ Clearance

Claims (4)

A wheel stopper for restraining the stop vehicle placed on the carrier bed of the transport vehicle so as not to move,
Consists of a front stop and a back stop that are placed on the carrier bed,
The front stop portion has a front inclined surface addressed to the circumferential surface of the tire from the front of the tire of the stopped vehicle,
The rear stop portion has a rear inclined surface addressed to the circumferential surface of the tire from the rear of the tire of the stopped vehicle,
The front stop portion and the rear stop portion restrain the positional relationship between the front inclined surface and the rear inclined surface by a hook that can be released from one side to the other, and the peripheral surface is directed to the front inclined surface and the rear inclined surface. A wheel stopper that prevents the tire from contacting the ground. The front stop is longer to the left and right than the distance between the left and right tires of the stopped vehicle, and has a front inclined surface that is simultaneously addressed to the peripheral surfaces of the left and right tires,
The rear stop portion has a rear inclined surface that is longer to the left and right than the distance between the left and right tires of the stopped vehicle, and is simultaneously addressed to the peripheral surfaces of the left and right tires,
The wheel stopper according to claim 1, wherein the positional relationship between the front inclined surface and the rear inclined surface is constrained by a pair of left and right hooks sandwiching both ends of the front inclined surface and the rear inclined surface. The wheel stopper according to claim 1 or 2, wherein the rear stop portion is provided with a rear guide path that contacts the cargo bed and extends from the rear to the rear inclined surface. The wheel stopper according to any one of claims 1 to 3, wherein the front stop portion is provided with a front guide path that contacts the loading platform and reaches the front inclined surface from the front.

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