JP7372675B2 - Trolley stopper device - Google Patents

Description

Article 30, Paragraph 2 of the Patent Act applies Provided to: Nikken Lease Industry Co., Ltd. (Musashi Factory) (3-8 Akanedai, Hanno City, Saitama Prefecture) Provided on: November 1, 2020

The present invention relates to a stopper device for a trolley on which cargo is placed and transported.

As disclosed in Patent Document 1, a conventional transportation trolley includes wheels, a support part that rotatably supports the wheels, a support part that is supported to be swingable in the vertical direction with respect to the support part, and a support part that supports the wheels directly. Alternatively, the caster wheel itself is equipped with a brake, and when the user steps on the brake pedal, the carrier brake pedal is depressed and the brake shoe is released. By pressing the wheel, the wheel is fixed, and by pressing the brake pedal upward with the user's foot, the pressure on the wheel by the brake shoe is released, allowing the wheel to rotate freely.

The trolley disclosed in Patent Document 2 includes a loading platform on which an article is placed, a caster frame provided on the rear side of the back of the loading platform, wheels provided on the caster frame, and wheels horizontally disposed inside the wheels. a plurality of recesses formed in an annular shape, and a locking mechanism that locks the wheels by inserting and removing wheel lock pins into and out of the recesses in the width direction of the truck, the locking mechanism having a flange portion; The wheel lock pin provided with the wheel lock pin, a set of shaft supports provided with a hole passing through the wheel lock pin in a horizontal direction, a pressing spring surrounding the wheel lock pin, and a bogie between the left rear wheel and the right rear wheel. It has a rotating body holding part fixed to the back surface of the main body, and a rotating body held by the rotating body holding part and including a lock lever part and a cam part, and the shaft support has a wheel side shaft support and a rotating body side shaft. When locked, by rotating the lock lever part of the rotating body, the cam part of the rotating body resists the elastic force of the pressing spring and increases the pushing width of the wheel lock pin in the width direction. The wheel lock pin is moved in the width direction of the truck so that the end of the wheel lock pin meshes with the recess of the wheel, and when unlocking, the lock lever is rotated in the opposite direction to when locking the rotating body. The cam part of the rotating body reduces the pushing width of the wheel lock pin in the width direction, and the pressing spring uses its elastic force to press the collar part of the wheel lock pin and the wheel side shaft support, so that the end part of the wheel lock pin is It is constructed so as not to mesh with the recessed portion of the wheel (Claim 1).

JP2019-182420A Patent No. 6304827

In Patent Document 1, the caster wheels themselves can be locked and unlocked by depressing and pushing up the brake pedal with the foot, but a brake must be provided and operated individually for each wheel, and , caster wheels may swing, making it unstable to stop the cart.
In Patent Document 2, two wheels can be locked and unlocked by rotating a rotating body, but a cam part, a pressing spring, a wheel lock pin, etc. are required, making the structure complicated. .

SUMMARY OF THE INVENTION An object of the present invention is to provide a stopper device for a truck that can solve the problems of the prior art.
SUMMARY OF THE INVENTION An object of the present invention is to provide a stopper device for a truck that can bring the truck to a stopped state by lifting one side of the truck by shifting from the retracted position to the grounded position.

A specific means for solving the problems of the present invention is to fix a support bracket to one side of an underframe that is movably supported by a plurality of wheels, and to move the stopper member to the retracted position via a horizontal shaft to the support bracket. The lower end of the stopper member is grounded between the support bracket and the stopper member and one side of the underframe is raised, and the upper part of the stopper member is fixed to the support bracket. A locking mechanism is provided.

According to the present invention, with the lower end of the stopper member grounded and one side of the underframe raised, the upper part of the stopper member is fixed to the support bracket via the lock mechanism, thereby keeping the cart in a stopped state. be able to.

FIG. 1 is an overall side view of a stopper device in a ground contact posture showing an embodiment of the present invention. FIG. 3 is a front view of the stopper device in a ground contact posture. FIG. 3 is an overall plan view of the stopper device in a grounding posture. FIG. 3 is a plan view of the stopper device in a ground contact posture. FIG. 3 is a front view of the stopper device in a retracted position. FIG. 3 is a side view of the stopper device in a retracted position. 6 is a sectional view taken along line XX in FIG. 5. FIG.

Embodiments of the present invention will be described below based on the drawings.
1 to 6, a stopper device 1 for a truck includes a support bracket 6 fixed to one side of an underframe 4, a stopper member 8 pivotally supported to the support bracket 6 via a horizontal shaft 7, and the support bracket 6. 6 and a locking mechanism 9 provided between the stopper member 8 and the stopper member 8.
In FIGS. 1, 3, and 5, the truck D to which the stopper device 1 is applied is called a transport truck, and includes an underframe 4 and three parallel mounting bodies fixed to the bottom side of the underframe 4. 28, and a total of six wheels 3 attached to both ends of each mounting body 28, and handle supports 22 serving as handles or partition rods can be erected at the four corners of the underframe 4.

The underframe 4 has a rectangular shape in plan view ( A rectangular shape) is provided between the two vertical members 23, and at least two vertical bars whose ends are connected to the horizontal members 24 are provided. The plate 26 is fixed.
The vertical members 23, the horizontal members 24, and the vertical members are made of aluminum alloy or the like and formed into a square pipe shape, and the corner members 25 are also extruded from aluminum alloy. Three pairs of parallel mounting bodies 28 are installed between the two horizontal members 24 on the lower surfaces of the vertical members 23, the horizontal members 24, and the vertical members.

The transport cart 1 has a rectangular shape that is long in the direction of transport movement, with the longitudinal direction being the horizontal direction, the members that are long in the longitudinal direction being called the horizontal members, the direction perpendicular to the longitudinal direction being the longitudinal direction, and the members long in the vertical direction being called the vertical members. It is called a member. However, the underframe 4 may have its length and width reversed so that the vertical members 23 are referred to as horizontal members and the horizontal members 24 are referred to as vertical members.
The wheel 3 is a caster wheel, and a seat plate 3a having a substantially square shape in plan view supports a yoke 3b so as to be rotatable around a vertical axis, and a tire 3c is supported on the yoke 3b so as to be rotatable around a horizontal axis. The wheels 3 located on both sides in the longitudinal direction are equipped with brakes 3d. Note that the wheel 3 may be a unidirectional rotating wheel without a vertical axis.

The corner member 25 has a cylindrical portion 25A into which the lower end of the handle support column 22 can be inserted, a pair of vertical connecting pieces 25B connected across the vertical member 23, and a pair of vertical connecting pieces 25B connected across the horizontal member 24. The horizontal connecting piece 25C is formed to be long over the top and bottom.
The top plate 26 on the top surface of the underframe 4 is formed of a flat aluminum plate, and the top surface serves as a loading surface for luggage. is formed, and the lower mounting body 28 is exposed, and these six space recesses 26a are located in the six spaces of the upper underframe 4 when another underframe 4 is placed on the underframe 4. This is the space in which the wheels 3 can fit.

1 to 6, the support bracket 6 of the stopper device 1 is fixed to the outer surface of one side of the underframe 4. As shown in FIGS. In the support bracket 6, left and right side plate portions 6b protrude forward from both left and right ends of the mounting portion 6a, and a guide piece 19 for guiding an engaging member 12, which will be described later, is protruded further forward from one of the left and right side plate portions 6b. This guide piece 19 has an inclined surface that approaches the center of the support bracket 6 as it extends from the side plate portion 6b to the front end.

The lower portions of the left and right side plate portions 6b of the support bracket 6 protrude downward from the mounting portion 6a, and a horizontal shaft 7 passes through the lower portions, and a stopper member 8 is attached to the horizontal shaft 7 to move from the retracted position N to the grounded position Y, or It is pivotably supported so as to be rotatable (position change) from the grounding position Y to the retreating position N.
The stopper member 8 includes a pair of support columns 17 whose middle portions are fitted and supported by the horizontal shaft 7 and whose lower ends can be grounded, and a connecting member 18 that connects the middle portions of the pair of support columns 17 near the lower ends. It has an upper connecting member 21 that connects the upper parts of the pair of support columns 17. The pair of pillars 17 and the connecting member 18 are formed of pipes having a substantially circular or octagonal cross section, and the upper connecting member 21 is formed of a plate material.

In the vertical relationship in the grounding posture Y, the connecting member 18 of the stopper member 8 is arranged at a position below the horizontal axis 7 on which a person can place his or her feet, and the upper connecting member 21 is at the uppermost position. It is placed in a position that allows you to rest your feet on it. When the upper connecting member 21 is rotated from the ground contact position Y or is in the retracted position N, the upper connecting member 21 protrudes forward from the support bracket 6 and can be pushed downward or upward by a person's toes. That is, the upper connecting member 21 also serves as a pedal member for moving the stopper member 8 up and down with the foot.

The locking mechanism 9 includes an engaging member 12 that is provided on the upper part of the stopper member 8 in the ground posture Y and removably engages with the support bracket 6, and an engaging member 12 that urges the engaging member 12 in the engaging direction. and an operating member 14 that operates the engaging member 12 in the disengagement direction.
The engaging member 12 is formed by bending a round bar into a substantially U-shape when viewed from the front, and has a handle portion 12c formed in the middle, and is bent from the upper end of the handle portion 12c to form an upper engaging portion. 12a is formed, and is bent from the lower end to form a lower guide portion 12b, and an operating member 14 is provided at the end of the guide portion 12b.

The engaging portion 12a and the guide portion 12b are substantially parallel, and the engaging portion 12a is provided through the upper part of one of the pillars 17, and its tip is engaged with and disengaged from the engaging hole P of the support bracket 6. Engage freely. The guide portion 12b passes through the support column 17 in the vicinity of the connecting member 18, and is positioned above and parallel to the connecting member 18.
The operating member 14 is attached to the end of the guide portion 12b, is guided to be slidable in the longitudinal direction on the upper surface of the connecting member 18, and can be moved laterally by a foot placed on the connecting member 18. A biasing member 13 is provided between the operating member 14 and the column 17.

The biasing member 13 is a coil spring fitted into the guide portion 12b, and biases the engaging member 12 in the direction of engaging the engaging portion 12a with the engaging hole P. By pushing the engagement member 12 against the force member 13, the engagement portion 12a can be pulled out (separated) from the engagement hole P.
The operating member 14 is moved by being guided by the upper surface of the connecting member 18, and a person places his or her feet on the upper surface of the connecting member 18, touches the operating member 14, and moves toward one of the pillars 17. This can be done by Of course, it is possible for a person to engage and disengage the engaging member 12 by hand, holding the operating member 14 or holding the handle portion 12c.

On the lower surface of the vertical member 23 on the rear side of the support bracket 6, a hanging member 20 is provided, which is a spring plate shaped into a substantially U-shape or a substantially Ω-shape. When this latching member 20 rotates from the grounding posture Y to the retracted posture N, the support 17 of the stopper member 8 can be fitted and latched while being elastically deformed. When the support column 17 is rotated to , it can be detached by rotating the support column 17 against elastic resistance.

In the stopper device 1 of the truck D, when the support column 17 of the stopper member 8 is engaged with the hooking member 20 and the stopper member 8 is in the retracted position N, the stopper member 8 is in a substantially horizontal position, and the upper connecting member 21 is connected to the support bracket 6. (shown by a solid line in FIG. 6). When a person steps on the upper connecting member 21 from below and moves it upward, the stopper member 8 is released from the latching member 20. The lower end of the support column 17 of the stopper member 8 comes into contact with the ground (as shown by the dashed line in FIG. 6).

When the stopper member 8 is rotated so as to move the upper connecting member 21 upward from the lower end of the support 17, the underframe 4 and the wheel 3 are lifted on the side where the stopper device 1 is disposed, and the locking mechanism 9 is engaged. The distal end of the engaging portion 12a of the member 12 is guided by the guide piece 19, moves once toward the release side, and then engages with the engaging hole P (as shown by the two-dot chain line in FIG. 6 and the solid line in FIG. 1).
When the engaging member 12 engages with the engaging hole P, the lower end of the stopper member 8 comes into contact with the ground and assumes a substantially vertical grounding posture Y, thereby placing the cart D in an immovable and stationary state.

From the grounding posture Y, a person moves the operating member 14 laterally with his/her foot placed on the connecting member 18 to disengage the engaging portion 12a from the engaging hole P against the biasing member 13 (see 2 in FIG. 2). ), and when the foot placed on the connecting member 18 pushes the connecting member 18 backwards or moves the truck D slightly forward, the stopper member 8 comes out of the grounding posture Y, and the truck D It descends and wheels 3 touch the ground.

When the wheel 3 touches the ground, the stopper member 8 becomes free, and the upper connecting member 21 can be moved downward by foot or hand, and the stopper member 8 is rotated to a substantially horizontal position to hang the support 17. When engaged with the stopper member 20, the stopper member 8 assumes the retracted position N.
The stopper device 1 for a truck D of the present invention, which has been described in detail in the above embodiment, has a support bracket 6 fixed to one side of an underframe 4 movably supported by a plurality of wheels 3, and A stopper member 8 is rotatably supported from a retracted position N to a grounded position Y via a shaft 7, and the lower end of the stopper member 8 is grounded between the support bracket 6 and the stopper member 8, and one part of the underframe 4 is Since a locking mechanism 9 is provided that fixes the upper part of the stopper member 8 to the support bracket 6 when the side of the stopper member 8 is raised, when the lower end of the stopper member 8 is grounded and one side of the underframe 4 is raised, the stopper member 8 is By fixing the upper part of the member 8 to the support bracket 6 via the lock mechanism 9, the truck D can be kept in a stopped state.

Further, the locking mechanism 9 includes an engaging member 12 that is provided on the upper part of the stopper member 8 in the ground posture Y and removably engages with the support bracket 6, and an engaging member 12 that is disposed in the engaging direction. Since it has a biasing member 13 that biases and an operation member 14 that operates the engagement member 12 in the detachment direction, the operation member 14 operates the engagement member 12 in the detachment direction to bring the cart D to a stopped state. It can be resolved.

Further, the stopper member 8 includes a pair of support columns 17 whose middle portions are supported by the horizontal shaft 7 and whose lower ends are grounded, and a connecting member 18 that connects the pair of support columns 17. The member 12 passes through the support 17 in the vicinity of an engagement portion 12a that passes through the upper part of one of the supports 17 and removably engages with the engagement hole P of the support bracket 6, and a connecting member 18. The operating member 14 is attached to the guide portion 12b and is guided by the connecting member 18 so as to be slidable in the longitudinal direction, and the biasing member 13 is connected to the support column 17. 14, the stopper member 8 can be easily and reliably locked and unlocked by engaging and disengaging the engaging portion 12a of the engaging member 12 with the engaging hole P of the support bracket 6. It can be carried out.

Furthermore, when the stopper member 8 is in the ground contact posture Y, the connecting member 18 is arranged at a position below the horizontal shaft 7 where the foot can be placed, and the operating member 14 is placed in a position where it can be operated by moving the foot placed on the stopper member 8 laterally. Because of this arrangement, the operating member 14 can be operated simply and easily by placing the foot on the connecting member 18.
The support bracket 6 is provided with a guide piece 19 that guides the engagement member 12 to the engagement hole P when the stopper member 8 rotates from the retracted position N to the grounded position Y. 8 from the retracted position N to the grounded position Y, the engaging member 12 is guided by the guide piece 19 and can be engaged with the engaging hole P, making it easy to change the position.

Furthermore, the stopper member 8 in the grounding posture Y has an upper connecting member 21 that connects the upper parts of the pair of support columns 17 and can be used as a footrest, and is provided on the rear side of the support bracket 6 from the grounding posture Y to the retracted posture. Since a latching member 20 is provided that latches the support column 17 of the stopper member 8 against resistance when rotated to N, the posture can be changed from the grounding posture Y to the retracted posture N, and from the retracted posture N to the grounding posture. You can change your posture to Y using your feet.

Note that the present invention is not limited to the above embodiments, and the shapes, configurations, combinations, etc. of members can be changed.
For example, the stopper device 1 can be applied to the truck D even if it is called a long truck, a pallet truck, a steel plate truck, a multi-stage truck, or the like.
The engagement member 12 of the lock mechanism 9 may have a structure in which it is pivotally supported on the upper part of the stopper member 8 and rotated to detachably engage with the support bracket 6.

The operating member 14 may be formed by hooking a toe on the handle portion 12c of the engaging member 12 or by providing a hook portion that can be grasped by hand.

1 Stopper device 3 Wheel 4 Underframe 6 Support bracket 6a Mounting part 6b Side plate part 7 Horizontal shaft 8 Stopper member 9 Lock mechanism 12 Engagement member 12a Engagement part 12b Guide part 12c Handle part 13 Biasing member 14 Operation member 17 Support column 18 Connecting member 19 Guide piece 20 Latching member 21 Upper connecting member 22 Handle strut D Dolly N Retracted position P Engagement hole Y Grounded position

Claims (6)

A support bracket (6) is fixed to one side of an underframe (4) movably supported by a plurality of wheels (3), and a stopper member ( 8) is rotatably supported from the retracted position (N) to the grounded position (Y), and the lower end of the stopper member (8) is grounded between the support bracket (6) and the stopper member (8), and the base A stopper device for a truck, characterized in that a locking mechanism (9) is provided for fixing the upper part of a stopper member (8) to a support bracket (6) in a state in which one side of the frame (4) is lifted. The locking mechanism (9) includes an engaging member (12) that is provided on the upper part of the stopper member (8) in the grounding posture (Y) and removably engages with the support bracket (6), and Claim 1 characterized by comprising: a biasing member (13) that biases the mating member (12) in the engagement direction; and an operating member (14) that manipulates the engaging member (12) in the disengagement direction. The trolley stopper device described in . The stopper member (8) includes a pair of columns (17) whose middle portions are supported by the horizontal shaft (7) and whose lower ends can be grounded, and a connecting member (18) that connects the pair of columns (17). has,
The engagement member (12) includes an engagement portion (12a) that passes through the upper part of one of the support columns (17) and removably engages with the engagement hole (P) of the support bracket (6); It has a guide part (12b) passing through the support column (17) near the connecting member (18),
The operating member (14) is attached to the guide portion (12b) and is guided by the connecting member (18) so as to be slidable in the longitudinal direction,
The stopper device for a truck according to claim 2, wherein the biasing member (13) is arranged between the support column (17) and the operating member (14). The stopper member (8) in the ground contact position (Y) is located at a position where the connecting member (18) can be placed below the horizontal axis (7) and is operated by moving the foot placed on it laterally. The stopper device for a truck according to claim 3, characterized in that an operating member (14) is disposed at. The support bracket (6) includes a guide piece that guides the engagement member (12) to the engagement hole (P) when the stopper member (8) rotates from the retracted position (N) to the grounded position (Y). The stopper device for a truck according to claim 2 or 3, further comprising: (19). The stopper member (8) in the grounding posture (Y) has an upper connecting member (21) that connects the upper parts of the pair of support columns (17) and can be used as a footrest.
On the rear side of the support bracket (6), there is a latching member (17) for latching the column (17) of the stopper member (8) against resistance when the support bracket (6) rotates from the grounding position (Y) to the retracted position (N). 20). The stopper device for a truck according to claim 1, further comprising: 20).

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