Cart with detachable casters

Abstract

To provide a stable dolly allowing its assembly and disassembly to be carried out simply with one action, when a caster is attached to the rear face of the dolly, especially characterized by the simple and compact stopper shape of the caster and the small bottom, allowing for attachment and detachment through easy operation.SOLUTION: A dolly is provided with a caster through an attachment part on the rear face of a base board of the dolly. A stopper is inserted below a stopper receiving part to prevent the base plate of the caster from coming out of the attachment part, and an engaging projection of the stopper is engaged in the stopper receiving part, wherein the attachment part is provided with a caster guide part having a pair of fixing grooves, the stopper is provided with a receivable body part and a spring-like arm part having the engaging projection, and the stopper receiving part is provided with a part to be engaged in which the engaging projection of the stopper is engaged when the stopper is displaced downward.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a cart that can be assembled and disassembled very easily with a single touch when attaching and detaching casters to the rear surface. [Background technology]

[0002] Conventionally, various proposals have been made for this type of cart to attach casters to the underside, such as structures that use bolts or screws to attach casters, or structures that attach by sliding the caster seat plate onto the caster mounting portion.Patent Documents 1 and 2 do not use bolts or screws, and simply slide the caster seat plate onto the caster mounting portion and fix the caster with a stopper, making them easy to operate. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2016-117395 [Patent Document 2] Patent Publication No. 2020-062922 Summary of the Invention [Problem to be solved by the invention]

[0004] In Patent Document 1, the caster seat plate slides onto the caster mounting portion and is fixed with a stopper, which is easier to operate than using bolts or screws. However, the caster stopper has a complex shape, which poses a risk of deformation or damage to the part. In addition, because the stopper is box-shaped and has a large bottom, the bottom area of ​​the stopper mounting portion on the trolley base must also be large to accommodate it. Therefore, it is desirable for the stopper to have a simpler shape, a smaller bottom surface, and be more compact.

[0005] In Patent Document 2, the caster seat plate slides onto the mounting portion on the underside of the carriage and is fixed with a detachable device (stopper), which is easier to operate than using bolts or screws. Patent Document 2 has a simpler structure than Patent Document 1, and the bottom surface of the detachable device (stopper) is smaller, so the area of ​​the corresponding stopper mounting portion on the carriage's base plate does not need to be as large as in Patent Document 1. However, the problem is that the operation to remove the detachable device (stopper) is complicated. To do this, the tongue-shaped piece of the detachable device (stopper) is pressed, and the engaged detachable piece is released to remove it (0022). In other words, you must release the latching detachable piece while pushing the tongue toward the base plate, and at the same time pull the detachable tool toward the opposite base plate. This requires applying force in the opposite direction at the same time, making it a complicated operation that requires some practice and skill. Therefore, it is desirable to have a structure that allows the attachment / detachment device (stopper) to be removed with an even simpler operation.

[0006] Therefore, in a cart with detachable casters, it is required that the shape of the caster stopper is simple, that it is compact, that it has a small bottom surface, and that it can be attached and detached by a simple operation.

[0007] To provide a stable cart which has a simpler shape than conventional ones when attaching casters to the rear surface of the cart and which can be easily assembled and disassembled with a single touch. [Means for solving the problem]

[0008] In order to achieve the above object, the present invention provides a trolley having casters attached to the underside of a base plate constituting the trolley via mounting parts, stoppers inserted downward into stopper receiving parts provided in front of the lateral wall surfaces of the mounting parts, the stoppers preventing the seat plate of the caster from being removed from the mounting parts, and engagement protrusions provided on the stoppers engaging with the stopper receiving parts, the trolley having a set of caster guide parts at the upper front end and upper rear end of the mounting parts, the caster guide part at the upper front end having a fixing groove into which one side end of the seat plate is inserted by sliding laterally, The caster guide portion at the end has a fixed groove into which the other side end of the seat plate is inserted by sliding it sideways, the stopper is made of resin and has a main body that can be stored parallel to the side wall surface of the mounting portion, and at both ends of the main body toward the front and rear of the trolley, each has a spring-like arm that extends from the underside of the main body to the upper side of the main body, the arm has an engaging protrusion on the outer wall surface of the arm, and the stopper receiving portion has an engaged portion that engages with the engaging protrusion of the stopper when the stopper is displaced downward.

[0009] The stopper has a plurality of slit portions on the underside of the main body portion, and the stopper receiving portion has rib-shaped engaging portions parallel to and perpendicular to the bottom surface of the stopper receiving portion, for engaging with each slit portion of the stopper when the stopper is displaced downward onto the bottom surface of the stopper receiving portion.This is a trolley characterized in that Furthermore, the stopper is a dolly characterized in that ears are provided at the upper end of each of the arms.

[0010] In this application, since the casters are attached with the base plate facing down, the base plate direction will be described as the downward direction and the reverse base plate direction will be described as the upward direction in accordance with the situation. [Effects of the Invention]

[0011] Therefore, when attaching a caster, first, one side end and the other side end of the base plate of the caster are inserted laterally into the fixing grooves of a pair of caster guides at the upper front end and upper rear end of the cart mounting part to fix the base plate, then the main body of the stopper is inserted downward into the stopper receiving part provided in front of the lateral wall of the mounting part, and at this time, the spring-like arms provided at both ends of the main body toward the front and rear of the cart, respectively, extending from the underside to the upper side of the main body, are gradually displaced downward while pinching the lugs provided at the upper ends of the arms from the outward to the inward direction, and after the stopper overcomes the engaging part on the inner wall of the stopper receiving part, the engaging protrusion of the arm engages with the engaging part of the stopper receiving part by releasing the lugs. Furthermore, each slit of the stopper engages with a rib-shaped engaging part provided parallel to the bottom surface of the stopper receiving part in a direction perpendicular to the When removing the caster, the tab of the stopper is pinched from the outside to the inside of the main body, the engagement is released, and the caster is removed by pulling it up. In short, after sliding the caster sideways, the ear portion of the stopper is pinched from the outside to the inside of the main body and pushed downward to engage with the engaging portion on the inner wall surface of the stopper receiving portion and the rib-shaped engaging portion, and the stopper can be attached with one touch. Conversely, by pinching the ears of the stopper from the outside to the inside, releasing the engaging projections, and then pulling up, the stopper can be removed with a single touch.

[0012] The stopper in Patent Document 1 has a complex shape, which means there is a risk of deformation and breakage of the parts, but the stopper in the present application has a simple overall shape and is therefore less likely to deform or break. Also, the stopper in Patent Document 1 is box-shaped and has a large bottom surface, which requires a large bottom surface area for the stopper mounting part on the bogie bed plate, but the stopper in the present application does not have a large bottom surface area, and does not require a large bottom surface area for the stopper mounting part on the bogie bed plate.

[0013] In Patent Document 2, to remove a caster, the tongue-shaped piece of the stopper is pushed down while the stopper is pulled up. This is a complicated operation because forces must be applied in opposite directions, downward and upward, at the same time. However, in the present application, the ears of the stopper are pinched from the outside to the inside, the engaging protrusion of the arm that is engaged with the engaged portion of the stopper receiving portion is released, and the stopper is pulled up. This operation is simpler than the stopper in Patent Document 1, which requires the user to apply forces in opposite directions, downward and upward, at the same time, and requires practice and skill. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a perspective view showing an embodiment of a bogie of the present invention. [Figure 2] FIG. 10 is an enlarged perspective view of the main part after the caster has been slid sideways and the stopper has been fitted in. [Figure 3] FIG. 10 is an enlarged cross-sectional view of a main part with a stopper fitted therein. [Figure 4(a)] FIG. 10 is a perspective view of the caster before it is slid laterally into the fixing groove. [Figure 4(b)] FIG. 10 is a perspective view showing the caster being slid sideways into the fixing groove. [Figure 4(c)] This is an oblique view of the caster after it has been slid horizontally into the fixed groove. [Figure 5(a)] This is a perspective view of the caster after it has been slid sideways and before the stopper has been fitted. [Figure 5(b)] FIG. 10 is a perspective view showing the caster being slid sideways and then the stopper being fitted in. [Figure 6] FIG. 10 is an enlarged cross-sectional perspective view of a main part before the stopper is fitted. [Figure 7] FIG. 10 is an enlarged cross-sectional view of a main part before the stopper is fitted. DETAILED DESCRIPTION OF THE INVENTION

[0015] FIG. 1 is a perspective view showing an embodiment of a cart according to the present invention. In FIG. 1, reference numeral 1 denotes a cart, and a base plate 100 constituting the cart 1 has a back surface 101 provided with a plurality of casters 200 .

[0016] The base plate 100 is an injection-molded product made of synthetic resin and has a generally rectangular planar shape. Reinforcing ribs 204 are arranged in a mesh pattern on the underside of the base plate 100 in the area where luggage is placed.

[0017] 2 and 3 are an enlarged perspective view and a cross-sectional view of the main part after the caster has slid sideways and the stopper has been fitted in. The caster 200 has a wheel support leg 202 connected to the center of the seat plate 201, and a wheel 203 is rotatably held by the wheel support leg 202. Reference numeral 108 denotes an attachment portion of the caster 200 provided on the back surface 101 of the base plate 100.

[0018] The mounting portion 108 is provided with a pair of caster guide portions 102 and 103 at its upper front end and upper rear end. The caster guide portion 102 has a fixing groove 104 into which one side end 205 of the seat plate 201 of the caster 200 is inserted by sliding it laterally in the depth direction. The structure is such that one side end 205 of the seat plate 201 is inserted into the fixing groove 104 by sliding it laterally in the depth direction, and the one side end 205 hits the edge 106a of the mounting portion 108 and does not move any further.

[0019] The other caster guide portion 103 has a fixed groove 105 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. The other side end 206 of the same seat plate 201 is simply inserted into the fixed groove 105 by sliding it laterally in the depth direction, and the other side end 206 hits the edge 106a of the mounting portion 108 and does not move any further.

[0020] 4(a) to 4(c) are perspective views showing the process of sliding the caster laterally into the fixing groove of the dolly. Figure 4(a) is a perspective view of the caster before it is slid sideways into the fixed groove, Figure 4(b) is a perspective view of the caster halfway through sliding sideways into the fixed groove, and Figure 4(c) is a perspective view of the caster after it has been slid sideways into the fixed groove of the trolley.

[0021] 5(a) and 5(b) are perspective views showing the process of fitting the stopper after sliding the caster laterally. Fig. 5(a) is a perspective view of the caster after it has been slid sideways but before the stopper has been fitted, and Fig. 5(b) is a perspective view of the caster after it has been slid sideways and before the stopper has been fitted in. The perspective view of the caster after the stopper has been fitted in is as shown in Fig. 2.

[0022] As shown in Figure 5(a), stopper 110 is made of resin and has a main body 111 that can be stored in front of the side wall of the mounting part and parallel to the side wall, and has spring-like arms 112 and 113 at both ends of the main body toward the front and rear of the cart, respectively, that extend from the bottom of the main body to the top of the main body, and arms 112 and 113 have engaging protrusions 114 and 115 on the outer wall surfaces of the arms. The arms are spring-shaped to take advantage of the properties of the resin. The main body 111 has a plurality of slits 116 on the lower side thereof.

[0023] As shown in FIG. 5(a), the stopper 110 has ears 117 and 118 at the upper ends of the arms 112 and 113, respectively.

[0024] On the other hand, FIG. 6 is an enlarged perspective cross-sectional view of the main part before the stopper is fitted, and FIG. 7 is an enlarged cross-sectional view of the main part before the stopper is fitted. The stopper 110 is inserted in front of the side wall surface of the mounting portion 108 . The stopper receiving portion 119 of the carriage has engaging portions 120 and 121, and the bottom surface 124 of the stopper receiving portion has a rib-shaped engaging portion 122 for engaging with each slit portion 116 of the stopper, which is parallel to and perpendicular to the bottom surface of the stopper receiving portion.

[0025] The engaging projections 114 and 115 of the arm are for engaging with engaged portions 120 and 121 of a stopper receiving portion 119 of the carriage when the stopper is displaced downward. That is, when ears 117 and 118 of the stopper are pinched from the outside to the inside of the main body and displaced downward, the force of the resin spring causes engaging protrusion 114 of the arm to overcome engaged portion 120 and then engage, and engaging protrusion 115 of the arm to overcome engaged portion 121 and then engage.

[0026] Furthermore, the plurality of slits 116 are intended to engage with a plurality of rib-shaped engaged portions 122 provided on the bottom surface of the stopper receiving portion of the carriage when the stopper is displaced downward. A plurality of the rib-shaped engaged portions 122 are provided corresponding to the slits 116 and are parallel to the bottom surface 124 of the stopper receiving portion in the vertical direction.

[0027] The stopper can be firmly fixed when displaced downward by the engaging protrusions 114 and 115 on the arm portion and the corresponding engaged portions 120 and 121 on the stopper receiving portion side. Furthermore, the engagement between the slit portions 116 and the corresponding multiple rib-shaped engaged portions 122 enables the stopper to be firmly fixed when displaced downward. The stopper 110 also has ears 117 and 118 at the upper end of each arm, which makes it easier to remove, especially when removing it, as the ears allow it to be grasped from both sides.

[0028] Therefore, in assembling or disassembling work, the dolly 1 is provided with the stopper 110 that can be attached and detached with one touch in order to fix the caster 200 to the mounting portion 108, and therefore assembly or disassembly can be done with a simple operation.

[0029] Therefore, unlike the conventional method, it is not necessary to drill bolt or screw through-holes in the caster mounting portion of the base plate constituting the dolly from the mounting direction of the seat plate, then to form bolt or screw through-holes in the base plate and fasten the bolts or screws into these through-holes. Also, because attachment and detachment can be done extremely easily by simply sliding the stopper 110, there is no need to use a complicated and unstable sliding structure as in the conventional method.

[0030] The stopper of the present invention does not have a large bottom surface, and the bottom surface area of ​​the stopper mounting portion of the base plate on the bogie side does not need to be large correspondingly.

[0031] The stopper of the present application is easier to operate than conventional stoppers, as the ears of the stopper are pinched from the outside to the inside to release the engagement between the engaging protrusion and the engaged portion, and then pulled up to release the engagement between the slit portion and the rib-shaped engaged portion.

[0032] As described above, when attaching a caster, first slide one and the other side ends of the seat plate of the caster sideways into both fixing grooves to fix the seat plate, then insert the main body of the stopper downward parallel to the lateral wall surface of the mounting part, and at that time pinch the ears of the stopper from the outside to the inside, so that the engaging protrusions of the arms engage with the engaging parts of the stopper receiving part, and furthermore the multiple slit parts on the underside of the stopper main body engage with the rib-shaped engaged parts of the stopper receiving part. When removing the connector, the ear portion is grasped from the outside to the inside of the main body portion, released from the engaged portion of the stopper receiving portion that is engaged with the engaging protrusion of the arm portion, and then pulled up.

[0033] In short, the caster seat plate is fixed to both fixing grooves, then the ear portion of the stopper is pinched from the outside of the main body to the inside, displaced downward, and engaged with the engaging portion of the stopper receiving portion, allowing for one-touch installation. Conversely, the ear portion can be removed with a single touch by pinching it from the outside to the inside of the main body, releasing the engagement, and pulling it up. [Industrial Applicability]

[0034] The present invention can be widely applied to bogies having a bed plate. [Explanation of symbols]

[0035] 1 cart 100 base plates 101 Back side 102 Caster guide part 103 Caster guide part 104 Fixed groove 105 Fixed groove 106a Edge 108 Mounting part 109 Side wall 110 Stopper 111 Main body 112 Arm 113 Arm 114 Engagement protrusion 115 Engagement protrusion 116 Slit section 117 Ears 118 Ears 119 Stopper receiving part 120 Engaged portion of stopper receiving portion 121 Engaged portion of stopper receiving portion 122 Rib-shaped engaged portion 123A Front direction of bogie 123B Dolly rear direction 124 Bottom of stopper receiving part 200 Caster 201 Seat board 202 Wheel support leg 203 Wheels 204 Ribs 205 One side end of seat plate 206 Other end of seat plate

Claims

1. A dolly having casters attached to the back surface of a base plate constituting the dolly via mounting parts, a stopper inserted downward into a stopper receiving part provided in front of a lateral wall surface of the mounting part, the stopper preventing the seat plate of the caster from being removed from the mounting part, and an engaging protrusion provided on the stopper engaging with the stopper receiving part, The mounting portion is A pair of caster guides is provided at the upper front end and upper rear end of the mounting portion, The caster guide portion at the upper front end has a fixing groove into which one side end of the seat plate is inserted by sliding laterally, The caster guide portion at the upper rear end has a fixing groove into which the other side end of the seat plate is inserted by sliding laterally, The stopper is It is resinous, a main body portion that can be stored in front of the side wall surface of the mounting portion and parallel to the side wall surface, a spring-like arm portion extending from a lower side of the main body portion to an upper side of the main body portion is provided at each end of the main body portion in a front side direction and a rear side direction of the bogie, The arm portion has an engagement protrusion on an outer wall surface of the arm portion, The stopper further includes a lug at the upper end of each of the arms, The stopper receiving portion is The stopper has an engaged portion for engaging with the engaging protrusion of the stopper when the stopper is displaced downward. A bogie characterized by:

2. The stopper is A plurality of slits are provided on the lower side of the main body, The stopper receiving portion is The bottom surface of the stopper receiving portion is provided with rib-shaped engaged portions that are parallel to and perpendicular to the bottom surface of the stopper receiving portion and engage with the slit portions of the stopper when the stopper is displaced downward.

2. The truck according to claim 1.

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