JP2011143769A - Dolly - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dolly for promptly and easily executing operation of switching a swing arm between a navigation position in which a wheel is positioned above a bottom and a carriage position in which the wheel is positioned under the bottom. <P>SOLUTION: The swing arm 13 set and retained at the navigation position by fitting a first stopper pin 21 in fitting holes 12d, 12e, 12f for navigation is switched to the carriage position by pressing in the tip end of the first stopper pin against the biasing force of a spring to remove the pin from the fitting hole for navigation, and swinging the swing arm to a position in which the tip end of the second stopper pin 22 is fitted in the fitting hole 12g for carriage. In the same way, the tip end of the second stopper pin is pressed in against the biasing force of the spring to remove the pin from the fitting hole for carriage, and the swing arm is swung to a position in which the tip end of the first stopper pin is fitted in the fitting hole for navigation to switch the swing arm set and retained at the carriage position to the navigation position. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a dolly used for moving a hull on land.

  As one type of dolly, Japanese Patent Application Laid-Open No. 2007-196805 discloses a base bracket that is detachably attached to the hull, and a base end that is swingable in the vertical direction with the base bracket attached to the hull. A dolly having a swing arm and a wheel rotatably attached to the tip of the swing arm is disclosed.

In the conventional dolly, the first pin is fixed to the base bracket and the hook is attached to the swing arm in order to set and hold the swing arm at the navigation position where the wheel is located above the ship bottom. The swing arm is set and held at the navigation position by locking the hook to the first pin.
Also, in order to set and hold the swing arm at the transport position where the wheel is located below the ship bottom, the second pin is fixed to the swing arm, the engagement groove is formed at the lower end of the base bracket, and the second pin is engaged. The swing arm is set and held at the navigation position by engaging with the groove.

JP 2007-196805 A

  In the conventional dolly, when the swing arm is set and held at the navigation position, the hook is operated, and when the swing arm is set and held at the transport position, the second pin must be engaged with the engagement groove. In order to switch between the navigation position and the transport position, different operation members must be operated, which is troublesome.

  Further, since the base bracket is provided with the first pin and the engaging groove and the swing arm is provided with the hook and the second pin, the structure of the base bracket and the swing arm is complicated, and thus the manufacturing cost is increased.

In view of such problems, the present invention provides a dolly that can quickly and easily perform an operation of switching a swing arm between a navigation position in which a wheel is located above the ship bottom and a transport position in which the wheel is located below the ship bottom. For the purpose.
Another object of the present invention is to provide a dolly that has a simple structure and can reduce manufacturing costs.

The invention according to claim 1 includes a base bracket that is detachably attached to the hull, a swing arm that has a base end attached to the base bracket so as to be swingable in a vertical direction with the base bracket attached to the hull, and a swing A dolly with a wheel rotatably attached to the tip of the arm,
The stopper pin is assembled to the base end of the swing arm so that it can advance and retract, and the tip of the stopper pin is urged by a spring so that it protrudes from the side of the swing arm.
The front end of the stopper pin is fitted to the base bracket, the navigation arm for setting and holding the swing arm at a navigation position where the wheel is located above the ship bottom, and the front end of the stopper pin are fitted. In combination, the swing arm is formed with a transport fitting hole for setting and holding the swing arm at a transport position below the ship bottom.

  According to a second aspect of the present invention, in the dolly according to the first aspect, the stopper pin for navigation in which the stopper pin is fitted in the fitting hole for navigation, and the transportation stopper in which the stopper pin is fitted in the fitting hole for transportation. The pin consists of two types of stopper pins, and the distance from the pivot to which the swing arm is swingably assembled to the base bracket to the transport stopper pin is set larger than the distance from the pivot to the navigation stopper pin. .

  According to a third aspect of the present invention, in the dolly according to the second aspect, the distance from the pivot to which the swing arm is swingably assembled to the base bracket and the transport stopper pin is set to the distance from the pivot to the navigation stopper pin. It is characterized by being set to 2 times or more.

  According to a fourth aspect of the present invention, in the dolly according to the first, second, or third aspect, the base bracket is formed in a groove shape having a bottom surface and both side surfaces, and the navigation fitting holes are formed on both side surfaces of the base bracket. And a transporting fitting hole is formed, and tip portions at both ends of the stopper pin are fitted into both the sailing fitting holes or both the transporting fitting holes.

  The invention according to claim 5 is the dolly according to claim 1, further comprising a base plate fixed to the hull, wherein the lower end portion of the base bracket is detachably locked to the base plate, and the upper end portion of the base bracket is It is characterized by being detachably fixed to the hull with bolts.

According to the dolly according to the first aspect of the present invention, the tip of the stopper pin is used to switch the swing arm in which the stopper pin is fitted in the navigation fitting hole and set and held at the navigation position to the transport position. Is pushed against the urging force of the spring and removed from the navigation fitting hole. Then, the swing arm is swung to a position where the tip end portion of the stopper pin is fitted into the carrying fitting hole.
Similarly, to switch the swing arm where the stopper pin is fitted into the carrying fitting hole and set and held at the carrying position to the navigation position, push the tip of the stopper pin against the biasing force of the spring. Remove from the carrying hole. Then, the swing arm is swung to a position where the tip of the stopper pin is fitted into the navigation fitting hole.
According to the present invention, it is possible to easily switch between the navigation position and the transport position by pushing the tip of the stopper pin and swinging the swing arm.

According to the second and third aspects of the invention, when the swing arm is set at the transport position, the wheel is grounded and the hull is moved, a large reaction force is generated from the road surface at the base end of the swing arm. Acting to cause bending. On the other hand, when the swing arm is in the navigation position, no reaction force from the road surface acts on the base end of the swing arm.
When the swing arm is in the transport position and the hull is moved, if the deflection generated at the base end of the swing arm is large, the tip of the stopper pin may be disengaged from the transport fitting hole. According to the invention described in the above, the distance between the pivot and the stopper pin for transportation is larger than the distance between the pivot and the stopper pin for navigation, and preferably set twice or more, so that the deflection of the base end of the swing arm can be suppressed, It can prevent that the front-end | tip part of the stopper pin for conveyance remove | deviates from the fitting hole for conveyance.

  According to the invention described in claim 4, since both ends of the stopper pin are fitted in the navigation fitting hole or the carrying fitting hole, respectively, the swing arm can be firmly set and held at the navigation position or the carrying position.

  According to the fifth aspect of the present invention, the dolly can be attached to the hull simply by locking the lower end of the base bracket to the base plate and tightening the base bracket to the hull with bolts. It becomes easy.

It is a perspective view which shows the inflatable boat provided with the dolly based on one Example of this invention. It is a side view which shows the state which has the swing arm of the dolly in a navigation position. It is a side view which shows the state which has the swing arm of the dolly in a conveyance position. It is a perspective view which shows the base bracket of the dolly. It is a side view which shows the base bracket of the dolly. It is sectional drawing which shows the stopper pin of the dolly.

  An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an inflatable boat 100 equipped with a dolly 10 according to an embodiment of the present invention. The inflatable boat 100 includes a port tube 101 that constitutes a port side and a starboard tube 102 that constitutes a starboard side, and the port tube 101 and the starboard tube 102 are connected by a bow tube 103 at the bow portion. Further, the port tube 101 and the starboard tube 102 are connected to each other at the stern portion by a transom plate 104, and the pair of left and right dollies 10 are mounted on the transom plate 104.

  As shown in FIGS. 2 and 3, each dolly 10 includes a base plate 11, a base bracket 12, a swing arm 13, and a wheel 14. As shown in enlarged views in FIGS. 4 and 5, the base plate 11 is configured by superposing the upper plate 11a and the lower plate 11b, and integrally fixing the plates 11a and 11b with screws (not shown). The lower plate 11b is set shorter than the upper plate 11a, and a locking recess 11c is formed on the back side of the upper end portion of the upper plate 11a. The base plate 11 is detachably fixed to the transom plate 104 with bolts 15 and double nuts 16.

  As shown in FIGS. 4 and 5, the base bracket 12 is formed in a groove shape composed of a bottom surface 12a and both side surfaces 12b. Each side surface 12b has a pivot through hole 12c, a first navigation fitting hole 12d, and a second. The navigation fitting hole 12e, the third navigation fitting hole 12f, and the transportation fitting hole 12g are formed in pairs. The first, second, and third navigation fitting holes 12d, 12e, and 12f are arranged on the same radius with the pivot through hole 12c as the center, and between the adjacent navigation fitting holes 12d, 12e, and 12f. Is given an angle difference of 20 degrees. Further, the first navigation fitting hole 12d is disposed in the vicinity of the upper end portion of the side surface 12b. The pivot through hole 12c is provided at a position shifted from the center of the side surface 12b to the upper end side. The carrying fitting hole 12g is disposed near the lower end of the side surface 12b. The first transport fitting hole 12d, the pivot through hole 12c, and the transport fitting hole 12g are arranged so as to be aligned in a substantially straight line. The distance between the pivot through hole 12c and the transport fitting hole 12g is at least twice the distance between the pivot through hole 12c and each of the navigation fitting holes 12d, 12e, and 12f. It is set to 3 times.

  The bracket 12 can be attached to and detached from the transom plate 104 by locking the lower end portion of the bottom surface 12a to the locking recess 11c of the base plate 11 and fastening the upper end portion of the bottom surface 12a to the transom plate 104 with a bolt 17 and a nut 18 with a knob. Is attached.

  A wheel 14 is rotatably mounted on the tip of the swing arm 13 by a shaft 19. At the base end of the swing arm 13, a pivot through hole, a first stopper pin through hole 13a (see FIG. 6), and a second stopper pin through hole 13b are formed. The through holes 13a, 13b of the swing arm and the fitting holes 12d, 12e, 12f, 12g of the bracket 12 are set to have the same diameter. The swing arm 13 is inserted into the pivot through-hole 12c of the bracket 12 and the pivot through-hole of the swing arm 13 so that the swing pin 13 is mounted on the transom plate 104 with the pivot pin 20 as a fulcrum. The bracket 12 is assembled to be swingable in the direction.

  The distance between the first stopper pin through hole 13a of the swing arm 13 and the pivot through hole is set equal to the distance between each of the navigation fitting holes 12d, 12e, 12f of the bracket 12 and the pivot through hole 12c. . The interval between the second stopper pin through hole 13b of the swing arm 13 and the pivot through hole is set equal to the interval between the carrying fitting hole 12g of the bracket 12 and the pivot through hole 12c. A first stopper pin 21 is attached to the first stopper pin through hole, and a second stopper pin 22 is attached to the second stopper pin through hole 13a.

  As shown in FIG. 6, the first stopper pin 21 includes a cylindrical case 21a having both ends opened, two left and right pin members 21b, and a coil spring 21c. The diameter of the tip of each pin member 21b is set to a desired size so as to be fitted into each of the navigation fitting holes 12d, 12e, 12f. The diameter of the base end portion of each pin member 21b is set to be slightly larger than the diameter of the tip end portion so that the pin member 21b does not come out from each fitting hole 12d, 12e, 12f. A spring mounting hole 21d is formed inside the base end portion of the pin member 21b.

  The first stopper pin 21 is mounted inside the first stopper pin through hole 13a. The first stopper pin 21 is configured by inserting a coil spring 21c and two pin members 21b into the cylindrical case 21a so as to sandwich the coil spring 21c, and attaching the end of the coil spring 21c to the spring mounting hole 21d. Each pin member 21b is urged by a coil spring 21c so that the tip portion protrudes outward from the through hole 13a. The second stopper pin 22 is mounted inside the second stopper pin through hole 13 b and has the same structure as the first stopper pin 21.

  The structure of the dolly 10 according to the present embodiment is as described above, and the usage method will be described below. 1 and 2 show a state in which the swing arm 13 is set at the navigation position. In this state, the first stopper pin 21 is fitted in the third navigation fitting hole 12f, and the swing arm 13 is set and held at the third navigation position. When the front end portion of the first stopper pin 21 is pushed, the front end portion is detached from the third navigation fitting hole 12f. When the swing arm 13 is swung in the direction of arrow A shown in FIG. 2 in the disengaged state, when the first stopper pin 21 is aligned with the second navigation fitting hole 12e, the second navigation is performed by the biasing force of the coil spring 21c. The swing arm is set and held at the second navigation position. Similarly, if the front end portion of the first stopper pin 21 is pushed in and the swing arm 13 is further swung in the direction of arrow A, the first stopper pin 21 is fitted into the first navigation fitting hole 12d. The arm 13 is set and held at the first navigation position. When the swing arm 13 is in the first, second and third navigation positions, the wheel 14 is held at a position higher than the ship bottom. Further, the swing arm 13 is held at the position farthest from the ship bottom when in the first navigation position, and is held at the position farthest from the transom plate 104 when at the third navigation position.

  In order to set and hold the swing arm 13 set and held at the navigation position at the conveyance position, the tip of the first stopper pin 21 is pushed in, and the first, second and third navigation fitting holes 12d, 12e and 12f are inserted. Without fitting into any of the holes, the swing arm 13 is swung in the direction of arrow B until the second stopper pin 22 is aligned with the carrying fitting hole 12g and fitted into the hole 12g. When the second stopper pin 22 is fitted in the carrying fitting hole 12g, the swing arm 13 hangs down from the bottom of the ship as shown in FIG. 3, and the wheel 14 is set and held below the bottom of the ship. The hull can be transported.

  In order to remove the dolly 10 from the hull, the knob nut 18 is loosened, the bolt 17 is removed from the transom plate 104, and the base bracket 12 is removed from the base plate 11. Thereby, the dolly 10 can be removed from the hull.

DESCRIPTION OF SYMBOLS 10 ... Dolly 11 ... Base plate 12 ... Base bracket 12a ... Bottom surface 12b ... Side surface 12c ... Pivot through-hole 12d ... First navigation fitting hole 12e ... Second navigation fitting hole 12f ... Third navigation fitting hole 12g ... transport fitting hole 13 ... swing arm 14 ... wheel 20 ... pivot pin 21 ... first stopper pin 21c ... coil spring 22 ... second stopper pin

Claims (5)

A base bracket that is detachably attached to the hull, a swing arm that has a base bracket attached to the base bracket so that the base bracket can swing in a vertical direction with the base bracket attached to the hull, and a swing arm that is rotatably attached to the tip of the swing arm A dolly equipped with a wheel,
The stopper pin is assembled to the base end of the swing arm so that it can advance and retract, and the tip of the stopper pin is urged by a spring so that it protrudes from the side of the swing arm.
The front end of the stopper pin is fitted to the base bracket, the navigation arm for setting and holding the swing arm at a navigation position where the wheel is located above the ship bottom, and the front end of the stopper pin are fitted. The dolly is characterized in that a carrying fitting hole for forming and holding the swing arm at a carrying position where the wheel is located below the ship bottom is formed.   The stopper pin consists of two types of stopper pins: a navigation stopper pin that fits into the navigation fitting hole and a transportation stopper pin that fits into the transportation fitting hole, and swings the swing arm around the base bracket. The dolly according to claim 1, wherein a distance from the pivot shaft to be assembled to the stopper pin for transportation is set larger than a distance from the pivot shaft to the stopper pin for navigation.   3. The dolly according to claim 2, wherein a distance from a pivot shaft to which the swing arm is swingably assembled to the base bracket to a transport stopper pin is set to be twice or more a distance from the pivot shaft to the navigation stopper pin. .   The base bracket is formed in a groove shape consisting of a bottom surface and both side surfaces, the navigation fitting hole and the transport fitting hole are formed on both side surfaces of the base bracket, and the tip portions at both ends of the stopper pin are for both navigation. The dolly according to claim 1, 2 or 3, wherein the dolly is fitted into the fitting hole or the two carrying fitting holes.   A base plate fixed to the hull is provided, the lower end of the base bracket is detachably locked to the base plate, and the upper end of the base bracket is detachably fixed to the hull with bolts. The listed dolly.

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