JP2009262655A - Cylinder exchange device on industrial vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a supporting means of a cylinder replacement device mounted on an industrial vehicle. <P>SOLUTION: A cylinder placing base 6 is energized in a direction to return to the side of a supporting base 11 by an elastic member 35(34) when it is revolved in the clockwise direction in the drawing. Consequently, moving speed in a downward direction of the cylinder placing base 6 is moderated. The cylinder placing base is fixed in a stable state when it revolves further and reaches a developing position. The cylinder placing base 6 receives energizing force of the elastic member 35(34) when it is revolved in the counterclockwise direction in the drawing after exchanging a cylinder 7. Consequently, it is possible for a worker to easily revolve the cylinder placing base 6 upward by receiving support of the elastic member 35(34) regardless of heavy weight of the cylinder 7. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a cylinder changing device for LPG (liquefied petroleum gas) mounted on an industrial vehicle such as a forklift.

  The cylinder changing apparatus 1 disclosed in Patent Document 1 is configured such that a cylinder mounting table 33 is disposed above a cylinder support 8 provided in the forklift 2, and the cylinder mounting table 33 functions as an extension member of the cylinder support 8. ing. When stacking the cylinder mounting table 33 on the cylinder support 8, the cylinder mounting table 33 is rotated by turning in the direction of the arrow e around the joining pin 41 as a rotation axis, and the fixing pin 44 a is fitted into the hole 18 a of the connecting plate 18. Fold and fix. When the cylinder 7 is exchanged, the cylinder mounting base 33 is rotated in the direction of the arrow e 'by unloading the fixing pin 44a from the hole 18a, and is deployed. Accordingly, the cylinder 7 is moved to a lower position, and the cylinder replacement operation is performed.

Patent Document 2 discloses a device for holding and exchanging a spare tire 5 held on the outer surface of a rear door 3 of an off-road type wagon vehicle. When the tire is replaced, the spare tire 5 is lowered in the vertical direction while the dropping speed is suppressed by the hydraulic absorber 10 and the turnover spring 11 integrated therewith by unlocking the assist arm 7. At the ground contact position of the spare tire 5, the assist arm 7 is biased in the ground contact direction by the turnover of the turnover spring 11, and the position of the spare tire 5 is stabilized. After replacing the spare tire 5 with another tire, the turnover spring 11 is turned over by lifting the newly attached tire upward by a certain amount. The assist arm 7 receives an upward urging force and can return to the outer surface position of the rear door 3 without requiring a large force.
JP-A-11-82178 Japanese Utility Model Publication No. 2-148890

  The cylinder exchanging device 1 of Patent Document 1 rotates the cylinder support 8 together with the cylinder mounting table 33 from the state mounted on the forklift 2 to the outside of the forklift 1 in a horizontal state. Next, the cylinder support 8 is inclined downward. The cylinder mounting table 33 is independently rotated from the inclined state around the joining pin 41, stopped at a position extending in a linear direction from the cylinder support 8, and the cylinder is replaced. Therefore, since the cylinder mounting table 33 is lowered in an inclined state, even if a heavy object such as a cylinder is mounted, the dropping speed does not become relatively large and can be operated safely. However, after the cylinder is replaced, the cylinder mounting table 33 must be rotated upward although it is mounted in an inclined direction despite the installation of a new cylinder whose weight has increased due to gas filling. For this reason, cylinder replacement is an operation that places a heavy burden on the operator.

  Patent Document 2 discloses a support means for reducing the burden on the operator. However, since the spare tire 5 is a holding and exchanging device for the spare tire 5 held on the outer surface of the rear door 3 of the wagon car, the spare tire 5 is substantially vertical. There is a special situation of going up and down. Therefore, in order to alleviate the high-speed movement at the time of dropping, it is a configuration in which the attachment of the hydraulic absorber 10 is essential. For this reason, when the assist arm 7 is returned after the tire replacement, the spring force of the turnover spring 11 in consideration of the resistance of the hydraulic absorber 10 is required. Such a support means of Patent Document 2 is inevitably increased in size and complicated, and is directly adopted in a cylinder replacement device having a structure in which the cylinder mounting table 33 of Patent Document 1 is rotated in two stages. It is difficult to do.

  An object of the present invention is to provide support means for a cylinder changing device attached to an industrial vehicle.

  The present invention according to claim 1 includes a support that is rotatable in a horizontal direction and a vertical direction, and a cylinder mounting table that is rotatably provided on the support, and the cylinder mounting table is mounted on the cylinder. In the cylinder replacement device for an industrial vehicle that is displaced to the stacking position of the cylinder and the deployment position for cylinder replacement, an elastic member is installed between the support base and the cylinder mounting base, and both ends of the elastic member are fixed. The portion is arranged at a position where an imaginary line connecting them passes through a rotation fulcrum of the cylinder mounting table as the cylinder mounting table rotates.

  According to the present invention described in claim 1, the operator can be supported with a simple configuration most suitable for the cylinder changer that rotates the cylinder mounting table in two stages, and the burden on the operator can be reduced. Can do.

  The present invention according to claim 2 is characterized in that a positioning mechanism for fixing the stacking position and the unfolding position is provided between the support base and the cylinder mounting table. Can be stabilized.

  The present invention according to claim 3 is characterized in that the support body is composed of a support bracket that is allowed to rotate in a horizontal direction and a support base that is allowed to rotate in the vertical direction with respect to the support bracket. Therefore, in addition to the effect of the first aspect, it is possible to realize a cylinder changing device that rotates the cylinder mounting table in two stages with the simplest configuration.

  The present invention can provide support means suitable for a cylinder replacement device attached to an industrial vehicle, and can reduce the burden on the operator.

(First embodiment)
1st Embodiment which implemented the cylinder replacement | exchange apparatus of this invention to the forklift is described based on figures.
The cylinder changing device 1 is attached to a rear pillar 4 standing on a head guard 3 of a forklift 2. The cylinder changing device 1 includes a support body 5 attached to the rear pillar 4 and a cylinder mounting table 6 on which a cylinder 7 attached to the support body 5 is mounted. The LPG filled in the cylinder 7 is used as fuel for the engine of the forklift 2.

  The support 5 includes a support bracket 9 and a support base 11. The support bracket 9 is attached to a vertical shaft 8 provided on one rear pillar 4 so as to be rotatable in the horizontal direction, and the support base 11 is attached to a horizontal shaft 10 provided on a part of the support bracket 9 so as to be rotatable in the vertical direction. It has been. The other rear pillar 4 is provided with a tip holding member 12 for holding the support 5 in a horizontal state.

  Details of the support 11 will be described with reference to FIGS. The two rods 13a and 13b are integrated with one end side fixed to a rectangular bracket 14 and the other end side connected to a connecting plate 15 and a receiving plate 16. The bracket 14 is provided with a pair of brackets 18 protruding so as to sandwich the cylindrical body 17 penetrating the horizontal shaft 10 on the opposite side to the rods 13a and 13b. The support base 11 is fixed to the horizontal state shown in FIG. 1 by operating the lock pin 37, and can be rotated to the inclined state shown in FIG. 2 by opening the lock pin 37. Two dampers 19 are installed between the support bracket 9 and the connecting plate 15. The cylinder side of each damper 19 is attached to the connecting plate 15, and the piston side is attached to the support bracket 9. Each damper 19 can alleviate an increase in movement speed due to the load of the cylinder 7 when the support base 11 rotates vertically downward about the horizontal axis 10, and can tilt the support base 11 at a safe speed. Since each damper 19 receives the load of the cylinder 7 when the support base 11 is rotated upward, the load on the operator can be reduced.

  As clearly shown in FIG. 2, the cylinder mounting table 6 has two rods 20 a and 20 b fixed at both ends to frame bodies 21 and 22 and integrated. In the middle part of each rod 20a, 20b, a curved mounting member 23 is fixed at two places on the back face part thereof. The curved shape of the mounting member 23 is formed to match the outer peripheral surface of the cylinder 7. Further, the frame 21 is provided with a handle 24 used for rotating the cylinder mounting table 6, and the frame 22 is provided with a handle 25 used for rotating the support 5 and the cylinder mounting table 6 as a whole. .

  A flat plate 26 provided on the back surface of the rods 20 a and 20 b on the frame body 22 side is overlapped on the receiving plate 16 of the support base 11 and is rotatably connected by a connecting shaft 27. The connecting shaft 27 serves as a rotation fulcrum of the cylinder mounting table 6. Therefore, the cylinder mounting table 6 can be independently rotated with respect to the support 5. The flat plate 26 is provided with positioning pins 28 that are slightly displaced from the connecting shaft 27. The positioning pin 28 is urged to the back side of the cylinder mounting table 6 by a spring (not shown), and is formed so as to be selectively engageable with the two positioning holes 29 and 30 drilled in the receiving plate 16. The positioning pin 28 is fitted into the positioning hole 29 when the cylinder mounting table 6 is in a stacked position where the cylinder mounting table 6 is stacked on the support table 11 for mounting the cylinder 7, and the cylinder mounting table 6 is substantially centered around the connecting shaft 27. When the cylinder 7 is in the unfolded position where the cylinder 7 is exchanged by turning 180 degrees, the cylinder 7 is fitted into the positioning hole 30. The positioning pin 28 and the positioning holes 29 and 30 constitute the positioning mechanism 31 of the present invention.

  A shaft 32 is fixed to the back surface of the rod 13 a of the support base 11. A shaft 33 is fixed to the rod 20 a of the cylinder mounting table 6. Two elastic members 34 and 35 made of tension springs are installed between the shafts 32 and 33, and both ends thereof are fixed to the shafts 32 and 33. The positions of both ends of the elastic members 34, 35, that is, the attachment positions of the shafts 32, 33 are connected such that an imaginary line Y (see FIG. 4) connecting the centers of the elastic members 34, 35 is a rotation fulcrum. It is arranged so as to pass through the center of the shaft 27. Therefore, the elastic members 34 and 35 urge the cylinder mounting table 6 in the clockwise direction in FIG. 2 when the virtual line Y is on the stacking position side with respect to the connecting shaft 27, and the virtual line Y is on the connecting shaft 27 unfolding position side. The time cylinder mounting table 6 is urged counterclockwise.

  The cylinder 7 is fixed in position by a belt 36 when mounted on the cylinder mounting table 6.

The operation of the first embodiment configured as described above will be described below.
The cylinder mounting table 6 on which the cylinder 7 is mounted is stacked on the support table 11, and the support body 5 is disposed in a horizontal state on the head guard 3 of the forklift 2. When the LPG is consumed, the cylinder 7 is replaced with a new cylinder in the following procedure.

  The operator releases the lock mechanism (not shown) between the rear pillar 4 and the support bracket 9 and holds the support 5 horizontally with the handle 25 held on the tip holding member 12 to the outer position of the forklift. To turn. Next, the lock pin 37 between the support bracket 9 and the support base 11 is opened, and the support base 11 and the cylinder mounting base 6 are rotated downward with the handle 25 and placed in an inclined state (FIGS. 3 and FIG. 3). 4). During this downward rotation, the load on the cylinder 7, the cylinder mounting table 6 and the support table 11 is received by the damper 19, so that a gentle rotation can be maintained. Further, the tilted state can be held at a fixed position by operating a lock mechanism (not shown).

  Next, the positioning pin 28 of the positioning mechanism 31 is pulled out from the positioning hole 29, and the cylinder mounting table 6 is rotated counterclockwise in FIG. The rotation of the cylinder mounting table 6 will be described in detail based on the operation diagrams of FIGS. In addition, each figure is shown with the rear view, in order to clarify the state of the elastic members 34 and 35.

  FIG. 4 shows a state immediately after the cylinder mounting table 6 in the stacking position is released from the locked state by the positioning mechanism 31, and the urging force of the elastic members 34 and 35 hardly acts. As shown in FIG. 5, the elastic members 34, 35 are stretched as the cylinder mounting table 6 is rotated, so that the cylinder mounting table 6 is returned to the support base 11 side (counterclockwise in FIG. 5). Energizing force works. Therefore, the elastic members 34 and 35 receive the weight of the cylinder mounting table 6 and the cylinder 7 and reduce the moving speed of the cylinder mounting table 6 in the downward direction. Further, when the cylinder mounting table 6 is rotated to the position of FIG. 6, the virtual line Y passes through the center of the connecting shaft 27. For this reason, the biasing directions of the elastic members 34 and 35 are switched, and the cylinder mounting table 6 is biased in the direction of the unfolded position (clockwise in FIG. 6). Therefore, there is no possibility that the cylinder mounting table 6 will inadvertently jump in the return direction after the position shown in FIG. When the cylinder mounting table 6 reaches the unfolded position in FIG. 7, the positioning pins 28 are automatically fitted into the positioning holes 30 to fix the unfolded position. In the position of FIG. 7, since the cylinder mounting table 6 is near the floor surface, the cylinder 7 can be easily replaced.

  When the replacement of the cylinder 7 is completed, the reverse operation is performed. 7, the operator pulls out the positioning pin 28 from the positioning hole 30 and opens the cylinder mounting table 6 at the unfolded position of the cylinder mounting table 6 shown in FIG. Next, the handle 24 is held and the cylinder mounting table 6 is rotated counterclockwise in FIG. The cylinder mounting table 6 is biased in a direction to return to the stacking position by a slight rotation of the cylinder mounting table 6 (see FIG. 5). Therefore, the operator can easily turn the cylinder mounting table 6 upward with the support of the elastic members 34 and 35 despite the large weight of the cylinder 7.

  As shown in FIG. 4, when the cylinder mounting table 6 returns to the stacked position on the support table 11, the positioning pins 28 are automatically fitted into the positioning holes 29 and are fixed to the stacked position. Then, holding the handle 25, the cylinder mounting table 6 and the support table 11 are lifted upward (clockwise in FIG. 3) and are positioned in a horizontal state. At this time, the lock pin 37 automatically operates. The cylinder mounting table 6 and the support table 11 are fixed in a horizontal state by a lock pin 37, and the support table 11 and the support bracket 9 are integrated. Next, holding the handle 25, the support 5 is horizontally rotated to the forklift 2 side and is positioned on the head guard 3 as shown in FIG. The cylinder replacement is completed by this series of operations.

The above-described first embodiment of the present invention has the following effects.
(1) A configuration in which the cylinder mounting table 6 on which the heavy cylinder 7 is mounted is rotated obliquely upward in an inclined state, and the cylinder mounting table 6 is elastically moved by the elastic members 34 and 35 from the time when the cylinder mounting table 6 is rotated slightly upward from the deployed position. The operator can easily perform the cylinder replacement work by combining with the configuration for applying the upward biasing force.
(2) Since the damper 19 can receive the weight of the support base 11, the cylinder mounting table 6, and the cylinder 7, the operator can easily replace the cylinder.
(3) The positioning mechanism 31 provided between the cylinder mounting table 6 and the support table 11 fixes the stacking position (the state shown in FIGS. 3 and 4) and the unfolding position (the state shown in FIG. 7) of the cylinder mounting table 6. It can be done easily.

  The present invention is not limited to the configuration of each of the embodiments described above, and various modifications are possible within the scope of the gist of the present invention, and can be implemented as follows.

(1) The point in time when the virtual line Y passes through the center of the connecting shaft 27 can be set freely within the rotation range of the cylinder mounting table 6 by changing the mounting position of the shafts 32 and 33.
(2) In addition to the positioning holes 29 and 30, one or more positioning holes for fixing the cylinder mounting table 6 may be provided in front of the deployment position in FIG. 7. If comprised in this way, it will become possible to fix the cylinder mounting base 6 before the deployment position. For example, when the road surface condition is bad, the cylinder mounting table 6 can be stopped at a slightly upper position so that the cylinder 7 can be easily replaced. Even if the operator inadvertently releases the handle 24 before the cylinder mounting table 6 reaches the unfolded position in FIG. 7, the cylinder mounting table 6 is not greatly returned to the upper side. Can be secured.
(3) A stopper may be arranged so that the cylinder mounting table 6 does not rotate more than the unfolded position in FIG.
(4) The elastic members 34 and 35 do not need to be disposed so that the imaginary line Y exceeds the center of the connecting shaft 27 as in the first embodiment when the cylinder mounting table 6 is in the unfolded position. . For example, when the cylinder mounting table 6 is in the unfolded position, the imaginary line Y of the elastic members 34 and 35 exists on the center of the connecting shaft 27 or is slightly displaced to the stacking position side from the center of the connecting shaft 27 It may be configured to exist. In the case of such a configuration, it is preferable to provide positioning means so that the cylinder mounting table 6 is stably maintained at the unfolded position.

It is a schematic perspective view which shows the state which mounted the cylinder on the forklift. It is a perspective view which shows the principal part of a cylinder exchange apparatus. It is a side view of a cylinder exchange device. It is a rear view of a cylinder exchange device. It is a rear view which shows the effect | action of a cylinder replacement | exchange apparatus. It is a rear view which shows the effect | action of a cylinder replacement | exchange apparatus. It is a rear view which shows the effect | action of a cylinder replacement | exchange apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cylinder exchange apparatus 2 Forklift 4 Rear pillar 5 Support body 6 Cylinder mounting base 7 Cylinder 9 Support bracket 11 Support base 19 Damper 24, 25 Handle 27 Connecting shaft 28 Positioning pin 29, 30 Positioning hole 31 Positioning mechanism 32, 33 Shaft 34, 35 Elastic member Y Virtual line

Claims (3)

A support body rotatable in a horizontal direction and a vertical direction, and a cylinder mounting table rotatably provided on the support body, the stacking position for mounting the cylinder mounting cylinder on the cylinder, and a deployment for replacing the cylinder In a cylinder changer in an industrial vehicle that is displaced to a position,
A cylinder replacement apparatus for an industrial vehicle, characterized in that an elastic member is installed between the support base and the cylinder base for assisting displacement of the cylinder base from a deployment position to a stacking position.   The cylinder replacement device for an industrial vehicle according to claim 1, wherein a positioning mechanism for fixing the stacking position and the unfolding position is provided between the support base and the cylinder mounting base.   The said support body was comprised from the support bracket in which the rotation of the horizontal direction was permitted, and the support stand in which the rotation of the support bracket was permitted to the perpendicular direction. Cylinder changer for industrial vehicles.

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