Dolly

Abstract

To provide a stable carriage that allows assembly and disassembly to be performed very easily with one-touch action while involving a reduced number of components as compared with conventional ones when installing a caster on a reverse surface.SOLUTION: A carriage is of a structure in which a wheel support leg is provided being connected in a central part of a seat plate 201, which is a component a caster, and a wheel is rotatably held on the wheel support leg. An upper front end of an installation part 102 has a fixing groove into which one side end 205 of the seat plate is inserted by being laterally slid, and an upper rear end of an installation part 103 has a fixing groove into which the other side end 206 of the seat plate is inserted by being laterally slid. An engaging projection is provided on a lateral side wall surface between the two installation parts, and an approximately box-shaped detachable tool which is attachable and detachable with one-touch action is provided on the lateral side wall surface. The detachable tool include: a body part which can be accommodated in parallel to the lateral side wall surface between the two installation parts; and two opening, including an opening which is open in a central part of the front face of the body part and an opening which is open in a central part of an upper surface of the body part.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a cart that, when attaching casters to the back surface, has fewer parts than conventional ones and can perform assembly and disassembly operations very easily with one touch.

Background Art

[0002] Conventionally, for this type of cart, when attaching casters to the back surface, various proposals have been made, such as those with a structure attached by bolts or screws, or those that attach the caster seat plate by sliding it into a slide receiving part. Patent Documents 1 and 2 have simple operability because they only slide the caster seat plate into the slide receiving part without using bolts or screws.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] Patent Document 1 has simple operability by sliding the caster seat plate into the slide receiving part rather than using bolts or screws, but the method of attaching and detaching the caster stopper (detaching tool) has a complicated structure. In particular, when removing the stopper (detaching tool), while pressing the tongue-shaped piece downward (toward the top plate), the detaching piece that is locked is released, and at the same time, the stopper (detaching tool) must be pulled upward (against the top plate direction). Pressing the tongue-shaped piece downward while pulling the stopper (detaching tool) upward requires applying forces in opposite directions, namely downward and upward simultaneously, which is a complicated operation and requires a certain degree of familiarity and technique. Therefore, it is desirable that the stopper (detachable device) be designed to allow for even simpler operation.

[0005] Patent Document 2 describes a method in which the caster's seat plate slides into the slide receiving part, offering simpler operation than using bolts or screws, but the shape of the caster's stopper (locking part 4) is complex. The stopper (locking member 4) in Patent Document 2 has an insertion piece 41, and its complex shape poses a risk of component damage. Furthermore, attaching and detaching the stopper (locking part 4) in Patent Document 2 involves moving the locking member diagonally upward and backward from below the outer peripheral rib, making diagonal movement more difficult than vertical movement. Therefore, a simpler stopper design and ease of operation are even more desirable.

[0006] Therefore, in a trolley with detachable casters, it is required that the caster stoppers (detachable devices) be easy to attach and detach, and that the shape of the stoppers (detachable devices) be simple.

[0007] The objective of this invention is to provide a stable trolley that requires even fewer parts than conventional trolleys when attaching casters to the underside, and that allows for extremely easy, one-touch assembly and disassembly. [Means for solving the problem]

[0008] To achieve the above objectives, the present invention provides a trolley comprising a base plate constituting the trolley, a caster provided on the underside of the base plate via a set of mounting parts, a wheel support leg connected to the center of the seat plate constituting the caster, and a wheel rotatably held by the wheel support leg, wherein the upper front end of the mounting part has a fixing groove into which one side end of the seat plate is inserted by sliding laterally, the upper rear end of the mounting part has a fixing groove into which the other side end of the seat plate is inserted by sliding laterally, an engaging projection is provided on the lateral wall surface between the two mounting parts, and a substantially box-shaped attachment / detachment device is provided on the lateral wall surface for one-touch attachment and detachment, and the attachment / detachment device is provided on the lateral wall surface of the mounting part and The trolley is characterized by having a main body that can store items in parallel, and two openings: one opening in the center of the front of the main body and another opening in the center of the top surface of the main body, the opening on the front having a detachable piece that attaches to and detaches from the side wall, the detachable piece protruding from the bottom of the main body toward the inside of the opening on the front in the direction of the side wall between the mounting parts, and the opening on the top having a gripping piece for releasing the detachable piece by a gripping motion, the gripping piece being formed in a substantially L shape toward the inside of the opening on the top from the bottom of the main body. [Effects of the Invention]

[0009] Therefore, when attaching a caster, first, one end and the other end of the caster's seat plate are laterally slid into both fixing grooves to secure the seat plate. Then, the main body of the attachment / detachment device is stored parallel to the side wall surface of the mounting part. At this time, the attachment / detachment piece, which gradually protrudes toward the side wall surface and is provided in the opening on the front of the main body, is engaged with the locking part on the side wall surface between the mounting parts while resisting its elastic force. When removing the caster, the tab provided in the opening on the top surface of the main body is pushed toward the side wall surface, releasing the elastic force with a pinching motion and lifting it up to remove it. In short, by fixing it in both fixing grooves, and then engaging the attachment / detachment device with the locking part on the side wall of the mounting part while resisting the elastic force, it can be attached with a single touch. Conversely, by pressing the tab of the attachment / detachment device while releasing the locking attachment / detachment piece and pulling it up, it can be removed with a single touch.

[0010] In Patent Document 1, when removing the caster, the operation involves pushing the tongue-shaped piece 117 of the attachment / detachment tool toward the top plate (down) while pulling the attachment / detachment tool toward the opposite direction (up). This is a complex operation because it requires applying force in opposite directions, down and up, simultaneously. However, in the present invention, the gripping piece of the attachment / detachment tool is pushed toward the opposite side wall (sideways) to release the locking attachment / detachment piece while pulling it up, making the operation simpler than applying force in opposite directions, down and up, as in the attachment / detachment tool of Patent Document 1.

[0011] Furthermore, while the attachment / detachment device described in Patent Document 1 is prone to being used incorrectly during installation, the present invention has ear-shaped parts on the attachment / detachment device side, and the insertion direction is clearly indicated by these ear-shaped parts, so there is no risk of using it incorrectly during installation.

[0012] The stopper (locking part 4) in Patent Document 2 has an insertion piece 41, and its complex shape increases the risk of component damage. However, in the present invention, the attachment / detachment part is generally box-shaped, making it less susceptible to deformation and damage. [Brief explanation of the drawing]

[0013] [Figure 1] This is a perspective view showing one embodiment of the trolley of the present invention. [Figure 2] Figure 1 is a perspective view of the reverse side. [Figure 3] This is an enlarged cross-sectional view of the same main part before the fastening mechanism is inserted. [Figure 4] This is an enlarged perspective view of the same part with the attachment mechanism inserted. [Figure 5] This is a front view of the attachment / detachment device. [Figure 6] This is a rear view of the same object. [Figure 7] This is a right side view of the same object. [Figure 8] This is a left side view of the same object. [Figure 9] The same plane diagram. [Figure 10] It is a cross-sectional view of the right side.

Embodiments for Carrying out the Invention

[0014] FIG. 1 is a perspective view showing an embodiment of the carriage of the present invention. FIG. 2 is a perspective view of the back surface in FIG. 1. In FIGS. 1 and 2, 1 is a carriage, and a plurality of casters 200 are provided on the back surface 101 of the base plate 100 constituting the carriage 1. The caster 200 is provided with a wheel support leg 202 connected to the central portion of the back surface of the seat plate 201, and the wheel 203 is rotatably held on the wheel support leg 202.

[0015] The base plate 100 is an injection molded product of synthetic resin, and its planar shape is rectangular. At least a reinforcing rib 204 is stretched in a mesh shape on the back surface of the base plate 100 at the portion where the luggage is placed.

[0016] In FIGS. 3 and 4, 102 and 103 are attachment portions of the caster 200 provided as reinforcing ribs on the back surface 101 of the base plate 100, respectively.

[0017] One of these attachment portions 1 is provided with a fixing groove 104 into which one side end 205 of the seat plate 201 of the caster 200 is laterally slid in the depth direction and inserted. This fixing groove 104 is structured such that when one side end 205 of the seat plate 201 is laterally slid and inserted in the depth direction, it hits the edge portion 106a and does not advance further. That is, the edge portion 106a at the upper front end of the attachment portion 102 has a fixing groove 104 into which one side end 205 of the seat plate 201 is laterally slid and inserted.

[0018] The other mounting portion 103 has a fixing groove 107 into which the other side 206 of the seat plate 201 of the caster 200 is inserted by sliding it laterally in the depth direction. This fixing groove 107 is structured such that when the other end 206 of the same seat plate 201 is inserted by sliding it laterally in the depth direction, it hits the edge portion 106a and does not advance any further. In other words, the edge portion 106a of the upper rear end of the mounting portion 103 has a fixing groove 107 into which the other end 206 of the seat plate 201 is inserted by sliding it laterally in the depth direction.

[0019] In Figure 3, 108 is an engaging projection installed laterally on the lateral side wall surface 109 between the mounting portions 102 and 103.

[0020] In Figures 5 to 10, 110 is a detachable device, and the detachable device 110 is roughly box-shaped. The attachment device 110 includes a main body 111 that can be stored parallel to the lateral wall surface 109 between the mounting parts 102 and 103, an opening 112 that opens in the center of the front of the main body 111, an opening 113 that opens in the center of the top surface, and ear portions 117 at both the left and right ends of the attachment device on the lateral wall surface side between the mounting parts.

[0021] The opening 112 that opens to the front has a detachable piece 116, and the detachable piece 116 protrudes from the bottom side 114 of the main body toward the inside of the opening in the direction of the lateral wall surface 109A between the mounting parts. In other words, it rises gradually from the bottom side 114 of the main body toward the inside of the opening 115 in the direction of the lateral wall surface 109A of the mounting portion.

[0022] In Figures 9 to 10, the opening 113 that opens to the upper surface has a gripping piece 119, which is formed in a substantially L-shape extending from the bottom side 114 of the main body towards the inside of the opening that opens to the upper surface. The gripping piece 119 is for releasing the attachment / detachment piece by a gripping motion. The gripping motion is to push the inner wall surface 120 of the gripping piece 119 from the inside in the direction of the side wall surface 109B. The gripping motion is controlled by the gripping piece 119 contacting the wall surface 121 of the main body, so damage to the gripping piece 119 can be prevented.

[0023] Therefore, during assembly or disassembly, this trolley 1 has a one-touch attachment / detachment device 110 for fixing and removing the casters from the two mounting parts 102 and 103, making it extremely easy to operate.

[0024] As shown in Figures 4 and 5, the attachment / detachment device is equipped with ear portions 117, and since the ear portions are located on the upper surface of the insertion portion 118, it is impossible to use the attachment / detachment device in the wrong direction.

[0025] Therefore, unlike conventional designs, it is not necessary to drill through-holes for bolts or screws in the mounting portion on the underside of the base plate that constitutes the trolley, from the direction in which the seat plate is attached, and then to provide through-holes for bolts or screws in the base plate and fasten bolts or screws through these through-holes. Furthermore, since it is extremely easy to attach and detach the attachment device 110, there is no need to adopt a complex and unstable sliding structure as in conventional designs.

[0026] As described above, when installing a caster, first, one end and the other end of the caster's seat plate are laterally slid into both fixing grooves to secure the seat plate. Then, the main body of the attachment / detachment device is stored parallel to the side wall surface of the mounting part. At this time, the attachment / detachment piece, which gradually protrudes toward the side wall surface and is provided in the opening on the front of the main body, is engaged with the locking part on the side wall surface between the mounting parts while resisting its elastic force. When removing the caster, the gripping piece provided in the opening on the top surface of the main body is pushed toward the side wall surface, releasing the elastic force with a gripping motion and lifting it up to remove it.

[0027] In short, when attaching the casters, the casters are fixed in both fixing grooves, and then the attachment tool is engaged with the locking part on the side wall between the mounting parts while resisting the elastic force, allowing for one-touch attachment. Conversely, when removing the casters, the aforementioned detachable device can be released with a single touch by pinching the locking piece. [Industrial applicability]

[0028] Brackets can be widely used in trolleys that have a base plate. [Explanation of Symbols]

[0029] 1 cart 100 base plates 101 Back side 102 Mounting part 103 Mounting part 104 Fixed groove 106a Edge 107 Fixed groove 108 Engagement protrusion 109 Side wall 109A Side wall direction 109B Opposite side wall direction 110 Attachment / detachment tool 111 Main body 112 Opening in the center of the front 113 Opening in the center of the top surface 114 Bottom of the main body 115 Inside of the opening 116 Detachable piece 117 Ears 118 Insertion section 119 pieces 120 Inner wall section 121 Wall section of the main body 200 casters 201 Seat board 202 Wheel support leg 203 Wheels 204 Rib 205 One side end 206 His side

Claims

1. A trolley having a base plate that constitutes the trolley, on which a set of mounting parts are attached to the underside of the base plate, and a wheel support leg is connected to the center of the seat plate that constitutes the caster, and the wheel is rotatably held by the wheel support leg, The upper front end of the mounting portion has a fixing groove into which one side end of the base plate is inserted by sliding it laterally. The upper rear end of the mounting portion has a fixing groove into which the other end of the base plate is inserted by sliding it laterally. The lateral wall surface between the two mounting portions has an engaging projection, The aforementioned side wall has a roughly box-shaped attachment / detachment device that can be attached and detached with a single touch, The aforementioned attachment / detachment device is The mounting portion includes a main body that can be stored parallel to the side wall surface of the mounting portion, and two openings: one opening in the center of the front surface of the main body and another opening in the center of the top surface of the main body. The opening on the front surface has a removable piece that can be attached to the side wall surface. The attachment piece protrudes from the bottom of the main body toward the inside of the opening that opens toward the front, in the direction of the lateral wall surface between the mounting parts. The opening on the upper surface has a gripping piece for releasing the attachment piece by a gripping motion. The aforementioned tab is formed in a substantially L-shape, extending from the bottom of the main body towards the inside of the opening that opens to the top surface. A trolley characterized by the following features.

2. The attachment device has ears on both the left and right ends of the upper surface on the side wall surface between the attachment parts of the attachment device. The trolley according to claim 1.

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