JP2011183932A - Carrying basket carriage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To develop a basket carriage easy in folding-up in storage or assembling in use with a simple constitution, and without a risk of trouble by the deterioration in a spring. <P>SOLUTION: A support pin 21 and a rear guide pin 22 are projected in the rear of both side surfaces of a bottom plate 16, and a front guide pin 23 is arranged in a front corner part, and the support pin 21 is fitted to an L-shaped long hole 27 of a support bracket 26. When the bottom plate 16 is vertical, the rear guide pin 22 enters a support bracket vertical groove 28 guided downward from an upper part of the circumference, and holds a vertical state, and lifts the bottom plate 16 in use, and removes the rear guide pin 22 from the support bracket vertical groove 28, and horizontally rotates the bottom plate 16, and the guide pin 23 is guided by a guide bracket horizontal groove 32. Workability is improved and the cause of the trouble is reduced with a simple constitution for preventing the upward rotational movement of the bottom plate 16 by movoing the front guide pin 23 and the rear guide pin 22 to the rear of a horizontal groove by pushing the bottom plate backward. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to a fixing structure for a bottom plate of a transport trolley that can be folded during storage.

Conventionally, there are casters at the bottom of the four corners, and it has a rear frame, a fixed side frame, a movable side frame, and a bottom plate. When folding, the bottom plate is pivoted up so that the bottom plate is placed at the lower end of the rear frame and overlaps the rear frame Next, the movable side frame is turned inside the rear frame and folded so as to overlap, and the whole is configured in a planar shape L shape so that nesting is possible, and in the assembled state, the floor portion is It is configured to lock the floor to the side frame lower horizontal rail so that it does not move.

  In this conventional transport trolley, the structure for locking the bottom plate to the side frame at the time of use is complicated, and multiple operations are required for the lock operation or the unlock operation. Therefore, the trolley is assembled or folded. There was a problem that work took time and the workability was poor.

In order to solve such a problem, a car cart described in JP-A-11-222135 has been proposed. As shown in FIG. 7, when the bottom plate 107 is rotated from the vertical position so as to be placed on the side frame lower cross member 101, the bottom plate 107 is urged in the direction of the pivot of the bottom plate 107 by the coil spring c2. The lock rod c1 is in contact with the inclined guide portion c4 ″ formed on the upper portion of the lock rod receiving member c4, and is locked along the inclined guide portion c4 ″ and against the urging force of the coil spring c2. When it moves to the opening side of the groove c4 ′ of the flange receiving member c4 and enters the opening of the groove c4 ′, it is inserted into the groove c4 ′ by the urging force of the coil spring c2. In this manner, the bottom plate 107 placed on the side frame lower cross member 101 is configured to be locked with respect to the side frame lower cross member 101.

Further, a hand is put in the opening 107d, and the lock rod c1 that crosses the opening 107d formed in the bottom plate 107 is pulled forward of the bottom plate 107 against the urging force of the coil spring c2 to receive the lock rod. The lock rod c1 inserted in the groove c4 ′ of the member c4 is taken out of the groove c4 ′, and the bottom plate 107 is locked to the side frame lower cross member 101 by rotating upward about the pivot shaft. The bottom plate 107 can be unlocked.

When the bottom plate 107 is rotated in a substantially vertical state so as to overlap the rear frame 102, the lock rod c <b> 1 biased in the pivot axis direction of the bottom plate 107 is attached to the rear frame 102. Abutting on the inclined guide portion c5 ″ formed on the receiving member c5, facing the opening of the groove c5 ′ along the inclined guide portion c5 ″ and against the urging force of the coil spring c2, the groove c5 ′ When entering the opening, the coil spring moves downward and is inserted into the lateral groove c5 ′ by the urging force of the coil spring c2. In this way, the bottom plate 107 is configured to be locked to the rear frame 102 so as to overlap the rear frame 102.

The operation of unlocking the bottom plate 107 locked to the rear frame 102 is the same as the unlocking of the bottom plate 107 locked to the side frame lower cross member 101 described above.

JP-A-11-222135

In the apparatus disclosed in Japanese Patent Laid-Open No. 11-222135, it is necessary to dispose the lock rod on the bottom plate and restrict the lock rod in the lateral direction, and pull the lock rod in one direction with a coil spring. Due to the problem of deterioration of the function of the spring, a simpler configuration has been desired.

In order to solve the above problems, the present invention includes a rear frame, a fixed side frame, a movable side frame, and a bottom plate, and casters are attached to the lower left and right ends of the rear frame, and casters are mounted on the fixed side frame and the lower front end of the movable side frame. And a movable side frame that is pivotally supported on the inside of the rear frame so that the bottom plate can be pivoted from a horizontal state to a vertical state inside the rear frame. Support pins are projected on both sides, the rear guide pins are projected slightly forward of the support pins, and the front guide pins are placed in parallel with the rear guide pins inside the front side corners of the bottom plate. A semi-circular support bracket is provided on the outside of the side of the bottom plate near both ends of the cross member, perpendicular to the rear frame, and the support bracket has an L-shaped long hole that bends vertically and fits with the bottom plate support pin. Bracket The rear guide pin has a vertical groove that is guided downward from the upper part of the circumference and a horizontal groove that is guided from the front to the rear of the circumference, and the front guide when the bottom plate is rotated and leveled. A front side guide pin having a horizontal groove with a front opening through which the front guide pin is guided rearward from the front is provided in front of the lateral members on the lower sides of the both side frames where the pins are located, and the bottom plate is rotated vertically to the rear frame side. At the same time, the rear guide pin moves along the outer periphery of the support bracket and is guided downward from the entrance of the vertical groove. At the same time, the support pin moves downward in the vertical portion of the L-shaped elongated hole so that the bottom plate is in a vertical state. When the bottom plate is rotated horizontally, the rear guide pin is guided from the upper part of the vertical groove to the entrance of the horizontal groove along the outer periphery of the support bracket, and the support pin is moved from the vertical part of the L-shaped elongated hole to the horizontal part. The front guide pin is guided The front guide pin and the rear guide pin move to the rear of the horizontal groove by pushing the bottom plate backward by hitting the entrance of the horizontal groove of the guide bracket in front of the side frame lower cross member. It is configured to move to the rear of the horizontal portion of the base plate to prevent the bottom plate from rotating upward.

Further, according to the present invention, the guide bracket tilts the lower part of the horizontal groove downward from the entrance toward the rear, and when the bottom plate is tilted horizontally or when the load is placed on the upper part of the bottom plate, The guide pin moves backward and the bottom plate moves backward.

Further, the present invention is characterized in that an opening is provided in the upper part of the front guide pins on both sides of the front side of the bottom plate so that the fitting state with the guide bracket can be visually confirmed.

As is clear from the above description, when the bottom plate is made vertical, the rear guide pin attached to the bottom plate enters the vertical groove of the support bracket and at the same time, the support pin descends the vertical portion of the L-shaped long hole of the support bracket. Thus, the vertical state can be maintained without any other component configuration. When the bottom plate is leveled, the front guide pin attached to the bottom plate enters the horizontal groove of the guide bracket and the rear guide pin also enters the horizontal groove of the support bracket. The support pin is an L-shaped long hole of the support bracket. The horizontal state can be maintained by reversing the horizontal portion. In this way, the support plate and the rear guide pin attached to the bottom plate are fitted into the L-shaped long hole and groove of the support bracket, and the front guide pin is fitted into the groove of the guide bracket, thereby fixing the bottom plate. It has a structure.

When turning the bottom plate from the horizontal position to the rear frame, pull the horizontal bottom plate toward you to remove the front guide pin from the horizontal groove of the guide bracket, and rotate the bottom plate to move the rear guide pin vertically to the support bracket. The vertical state can be maintained simply by guiding it into the groove.

Also, when using the car carriage, simply lift the bottom plate in the vertical state, remove the rear guide pin from the vertical groove and turn it horizontally to guide the front guide pin on the bottom plate into the horizontal groove on the guide bracket and push the bottom plate backward. As a result, the bottom plate and both side frames are locked. No spring is required, and there is no lock hook, so the structure is easy to fold during storage or assembly during use, and there is no risk of trouble due to deterioration of the spring.

Illustration of the position of the bottom plate during use (movable side frame omitted) Appearance of transport cart Bottom plate illustration The bottom plate is vertical (movable side frame omitted) Figure with the bottom plate lifted vertically (movable side frame omitted) Figure of bottom plate rotated horizontally (movable side frame omitted) Explanatory drawing of JP-A-11-222135

An embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the transport trolley 1 has a rear frame 11, a fixed side frame 12, a movable side frame 13, a bottom plate 16 that receives a load, and four corner casters 18. A load is stored on the bottom plate 16 inside the rear frame 11 and the side frames 12 and 13.

As shown in FIG. 1, the rear frame 11 has a rectangular outer frame frame in which a round pipe is bent in an inverted U shape on an L-shaped rear frame lower cross member 14 and a plurality of vertical frames intersecting the inside. It is comprised with the member and the horizontal member. At both ends of the rear frame lower cross member 14, a plate-shaped support bracket 26 having a quadrangular shape for holding the bottom plate is fixed by welding at a distance of the width of the bottom plate toward the front in the vertical direction.

As shown in detail in FIG. 1B, the support bracket 26 has an L-shaped elongated hole 27 bent vertically downward at the center, and has a support bracket vertical groove 28 at the upper part and a support bracket at the front part on the outer periphery of the quarter circle. The horizontal groove 29 is processed. Further, caster mounting plates 17 are welded and assembled to the lower portions of both ends of the rear frame lower cross member 14, and casters 18 are respectively attached to the lower side.

As shown in FIG. 1, the fixed side frame 12 has a plurality of crossings that intersect with a rectangular outer frame frame in which a round pipe is bent in an inverted U shape on a side frame lower cross member 15 having an L-shaped cross section. It is comprised with the vertical member and the horizontal member. As shown in detail in FIG. 1C, a plate-shaped guide bracket 31 in which the front guide pin 23 is fitted is attached to the front of the side frame lower cross member 15, and the front guide pin 23 is attached to the guide bracket 31 from the front of the opening. A guide bracket horizontal groove 32 having a front opening that slides backward is machined. The lower surface of the opening of the guide bracket horizontal groove 32 is provided with an inclined portion 33 downward from the front toward the rear.

The fixed side frame 12 is welded to the caster mounting plate 17 on the lower left side of the rear frame 11 and connected to the rear frame 11, and the outer frame frame of the fixed side frame 12 and the outer frame frame of the rear frame 11 are connected to each other. The metal fitting 19 is fixed by welding. A caster mounting plate 17 is assembled to the lower front portion of the side frame lower cross member 15 and a caster 18 is provided on the lower side.

As shown in FIG. 2, the movable side frame 13 also has a rectangular outer frame frame in which a round pipe is bent in an inverted U shape on the side frame lower cross member 15 having an L-shaped cross section, and a plurality of crossings that intersect with the inside. It is comprised with the vertical member and the horizontal member. As shown in detail in FIG. 1C, in front of the side frame lower cross member 15, a plate-shaped guide having a front opening guide bracket horizontal groove 32 fitted with a front guide pin 23 and sliding backward from the front of the opening. A bracket 31 is attached. In addition, a caster mounting plate 17 and a caster 18 are provided at the lower front portion. The lower end of the outer frame frame behind the movable side frame 13 is inserted into a support pin standing on the caster mounting plate 17 on the right side of the rear frame 11, and the outer frame frame of the movable side frame 13 and the outer frame frame of the rear frame 11 Are connected by a plurality of connecting brackets 19 that can be rotated.

The bottom plate 16 made of resin or sheet metal as shown in FIG. 3 has support pins 21 attached to both ends of the rear surface, the support pins 21 protrude from both side surfaces of the bottom plate 16, and the rear guide pins 22 are the same in front of the support pins 21. The support pin 21 and the rear guide pin 22 are protruded at a height, and are fitted into support brackets 26 attached to both sides of the rear frame lower cross member 14 (FIG. 1). As shown in FIG. 3, front guide pins 23 are provided inside the front side corners of the bottom plate 16, and the front guide pins 23 are fitted to guide brackets 31 in front of the lateral members at the bottom of both side frames. Above the front guide pin 23, an opening 16a is provided in the bottom plate 16 for visual confirmation of the fitting state.

Hereinafter, the operation of the above configuration will be described.
When the bottom plate 16 is rotated from the upright vertical position (FIG. 4) to the horizontal position, when the bottom plate 16 is pulled up, the rear guide pin 22 is disengaged from the support bracket vertical groove 28, and the support pin 21 has an L-shaped elongated hole 27. Go up to the top of the vertical groove (Fig. 5).

When the bottom plate 16 is rotated horizontally as it is, the rear guide pin 22 is guided to the support bracket horizontal groove 29 along the outer periphery of the support bracket 26 and the front guide pin 23 is attached to the lower horizontal member 15 on both side frames. When the bottom plate 16 is pushed rearward by hitting the opening of the guide bracket horizontal groove 32 of the bracket 31 (FIG. 6), both the front and rear guide pins easily slide to the rear of the horizontal groove, and the support pin 21 is supported by the support bracket 26. The bottom plate 16 is regulated so as not to be lifted up by being guided behind the horizontal portion of the L-shaped long hole 27 (FIG. 1).

Further, the lower surface of the opening of the guide bracket horizontal groove 32 is provided with an inclined portion 33 downward from the front to the rear as shown in detail in FIG. 1C, and the bottom plate 16 is pushed backward when the bottom plate 16 is tilted horizontally. When the loading is performed without the load, the front guide pin 23 hits the inclined portion 33 and the bottom plate 16 is pushed backward. An opening 16a is provided above the front guide pin 23 of the bottom plate 16, and the fitting state between the front guide pin 23 and the guide bracket 31 can be visually confirmed.

When the bottom plate 16 is tilted horizontally, the lower surfaces of both sides of the bottom plate 16 are in contact with the side frame lower cross member 15, and the rear lower surface of the bottom plate 16 is in contact with the rear frame lower cross member 14, and the load applied to the bottom plate 16 is The front and rear guide pins 22 and 23, the support pins 21, the guide bracket 31 and the support bracket 26 are provided with play so as to cover the lower cross member 15 and the rear frame lower cross member 14.

When the bottom plate 16 is rotated from the horizontal state to the upright vertical state, the bottom plate 16 is first pulled forward, the front guide pin 23 is removed from the guide bracket horizontal groove 32, and the rear guide pin 22 is simultaneously removed from the support bracket horizontal groove 29. When the disengagement support pin 21 is guided to the vertical portion of the L-shaped long hole 27 and then the bottom plate 16 is turned upright to bring it into the vertical state, the rear guide pin 22 slides downward from the entrance of the support bracket vertical groove 28 and simultaneously. The support pin 21 is guided below the vertical portion of the L-shaped long hole 27 of the support bracket 26. Thereby, the bottom plate 16 is maintained in a vertical state.

By folding the movable side frame 13 inward with the bottom plate 16 standing in the vertical position, the entire car cart becomes a flat L shape and can be nested.

DESCRIPTION OF SYMBOLS 1 Car trolley 11 Rear frame 12 Fixed side frame 13 Movable side frame 14 Rear frame lower horizontal member 15 Side frame lower horizontal member 16 Bottom plate 16a Opening portion 17 Caster mounting plate 18 Caster 19 Connecting bracket 21 Support pin 22 Rear guide pin 23 Front portion Guide pin 26 Support bracket 27 L-shaped long hole 28 Support bracket vertical groove 29 Support bracket horizontal groove 31 Guide bracket 32 Guide bracket horizontal groove 33 Inclined portion 101 Side frame lower cross member 102 Rear frame 107 Bottom plate 107d Opening portion c1 Lock rod c2 Coil spring c4 Lock rod receiving member c4 'groove c4 "inclined guide portion c5 Lock rod receiving member c5' groove c5" inclined guide portion

Claims (3)

A rear frame, a fixed side frame, a movable side frame, and a bottom plate are provided, casters are attached to the lower left and right ends of the rear frame, casters are attached to the fixed side frame and the lower front end of the movable side frame, and the movable side frame is inside the rear frame. In a transport trolley that is pivotally supported so that it can be folded and can be rotated from a horizontal state to a vertical state inside the rear frame, support pins are projected by projecting support pins on both sides of the rear end of the bottom plate. The rear guide pins protrude slightly forward, and the front guide pins are placed in parallel to the rear guide pins inside the front side corners of the bottom plate, and near the both ends of the bottom frame lower cross member on the outside of the bottom plate side surface. A four semicircular support bracket is provided vertically on the rear frame, and the support bracket has an L-shaped long hole that bends vertically downward to fit with the bottom plate support pin. Top of The front side of the lower frame on both sides where the front guide pin is located when the bottom plate is rotated and leveled with a vertical groove guided downward and a horizontal groove guided from the front to the back of the circumference. Includes a guide bracket having a horizontal groove with a front opening through which the front guide pin is guided rearward from the front, and the rear guide pin is arranged at the outer periphery of the support bracket when the bottom plate is rotated vertically to the rear frame side. At the same time, the support pin is moved downward along the vertical portion of the L-shaped elongated hole to fix the bottom plate in a vertical state, and the bottom plate is rotated horizontally. Sometimes the rear guide pin is guided from above the vertical groove to the entrance of the horizontal groove along the outer periphery of the support bracket, the support pin is guided from the vertical part of the L-shaped elongated hole to the horizontal part, and the front guide pin is on both sides Guide bracket in front of the horizontal member at the bottom of the frame The front guide pin and the rear guide pin are moved to the rear of the horizontal groove by pushing the bottom plate backward, and the support pin is moved to the rear of the horizontal portion of the L-shaped long hole. A transport trolley that is configured to prevent upward rotation of the bottom plate. The guide bracket tilts the lower end of the open end of the horizontal groove downward from the entrance, and the front guide pin is moved backward by the weight of the load when the bottom plate is tilted horizontally or when the load is placed on the top of the bottom plate. The car trolley for transportation according to claim 1, wherein the movable bottom plate is configured to move rearward. The car trolley for transportation according to claim 1 or 2, wherein an opening is provided in an upper part of the front guide pins on both sides of the front side of the bottom plate so that a fitting state with the guide bracket can be visually confirmed.