SK9455Y1 - Hand truck - Google Patents

Abstract

Hand truck (100) comprising a chassis (110) having a four-sided shape and a detachable handle (120) comprising at least one tip (122) having at least one sleeve (130) located on the four sides of the chassis (110) for detachable and repeated reception of at least one tip (122).

Description

This description applies to trucks used in logistics. In particular, this description relates to handcarts with a removable handle.

Prior art

Hand trucks are well known in the logistics sector as wheeled flatbed trucks for transporting items such as boxes, crates, panels, etc., in warehouses and between warehouses or production facilities, and transport vehicles. While handcarts are mostly transported by hand, special handcarts have been developed that are attached to other handcarts to transport several handcarts in a column. Such a column of hand trucks can be towed directly by a forklift or similar vehicle. Modifying a traditional hand-drawn column trolley typically increases complexity and weight, which is often not desirable.

Auxiliary devices for receiving a hand truck have been developed, which would otherwise be unsuitable due to the connection to another hand truck to form a column and the integration of the hand truck into the column of other such auxiliary devices for transporting hand trucks. Such auxiliary devices are known as tractors. Tractors are modular wheeled trucks with a connection to another tractor and / or a vehicle for towing a column of tractors. While tractors immediately solve the problem of transporting multiple hand trucks by simple construction, the actual cooperation between the tractor and the hand truck can be cumbersome or laborious.

There is a long-standing need for a simple hand truck that can be used flexibly in a tractor configuration. This description provides for the design of such a handcart or at least to provide the public with a useful alternative.

The essence of the technical solution

The technical solution is defined by the characteristics of the independent claims. Some specific embodiments of the technical solution are defined in the dependent claims.

According to a first aspect of the present disclosure, there is provided a hand truck with a chassis having a four-sided shape and a detachable handle having at least one spike. The hand truck is characterized by at least four sleeves, wherein at least one of the at least four sleeves is provided on the respective four sides of the chassis to secure, detachably and repeatedly, the at least one tip.

Different embodiments of the technical solution may contain at least one characteristic from the following list of items:

- the chassis comprises a frame with a side surface defining the circumference of the chassis;

- at least one sleeve is provided on each side as a channel which opens to the side surface;

- the at least one latch comprises a toothed end;

- the tooth is configured to engage the counterpart on at least one sleeve when the latch is in engagement;

- wherein the latch is connected to the tip by means of an axle which ensures rotation between the engaged and released state;

- the handle comprises a biasing element configured to force the latch into the engaged state;

- the handle comprises a rod to provide grip for the user;

- at least one point continues from the rod;

- each side of the chassis contains two sleeves;

- each handle contains two spikes;

- the rod connects the two points;

the handle comprises two such latches located on said two points;

- the handle comprises a lever connecting the latches;

- the handle comprises at least one latch located on at least one tip;

- the at least one latch is configured to manipulate it between an engaging condition in which the at least one spike cannot be pulled out of the sleeve and a released condition in which the at least one spike cannot be pulled out of the sleeve;

- The hand truck contains only swivel wheels mounted on the chassis.

Significant benefits will be gained with the new design. With the coupling interface provided on all four sides of the hand truck, the design is more sensitive to use with the tractor because the soft truck can be fed and removed from the tractor in all orientations using a detachable handle.

According to certain embodiments of the technical solution, the connecting interface between the handle and the chassis

The SK 9455 Υ1 hand truck contains a latch, which greatly improves the usability of the hand truck. The usability can be further improved by using two latches spaced apart and connected by a lever.

Overview of figures in the drawings

In the following, certain examples of embodiments of the technical solution are described with reference to the accompanying drawings, in which:

Figure 1 shows a perspective view of a hand truck according to at least some embodiments of this technical solution;

figure 2 shows a perspective view of the hand truck according to figure 1 with the handle separated;

Figure 3 shows a detailed view of area A in Figure 1;

Figure 4 shows a detailed view of area B in Figure 2;

figure 5 shows a detailed sectional view of the connecting interface between the chassis and the handle of the hand truck in figure 1 with the handle in the disconnected state;

Figure 6 shows a detailed cross-sectional view of the connection interface between the chassis and the hand truck handle of Figure 1 during the transition between the disconnected and connected state of the handle;

Figure 7 shows a detailed cross-sectional view of the coupling interface between the chassis and the hand truck handle of Figure 1 with the handle in the attached state and Figure 8 shows a detailed bottom perspective view of the biasing element for forcing the coupling interface into the engaged state.

Examples of embodiments

Figures 1 and 2 show a hand truck 100 according to at least some embodiments of this technical solution with the handle 120 attached and respectively. disconnected. The hand truck 100 has a generally four-sided chassis 10 formed by a frame 111 with four sections, subsequently joined together. The four-sided chassis 110 has four sides, namely a first side 150A, a second side 150B, a third side 150C and a fourth side 150D with successive right angles to each other. The frame 111 can be constructed, for example, from a metal profile by welding. In the example shown in the figures, the frame 111 has a generally quadrangular cross-section with an outer surface forming a side surface and an upper surface forming a load bearing surface of the chassis 110. the intermediate element can be constructed of a flat piece, such as a plywood panel. The corner supports 160 may be placed in the corners between the sides 150 to provide lateral support for the contents of the hand truck 100. The corner supports 160 may be constructed as brackets that are attached to the frame 111, for example by welding.

The hand truck 100 comprises wheels 140 mounted on a chassis 110. The wheels 140 comprise a wheel 143 which is connected to a fork 141 by a shaft 142. The forks 141 are mounted on a chassis 110, in particular on wheel plates 131 located in the inner corners of the frame 111. The chassis 110 may comprise a wheel spring 114 on top of the wheel plates 113 for holding and holding the wheel 143 of the loaded hand truck. The wheel spring 114 may take the form of a sprung wire, as shown in the figures, or any superstructure conforming to the contour of the wheel 143. The wheels 140 are preferably all swivel wheels to allow pushing and pulling by either of the four sides as the front end. Similarly, the carriage 110 preferably includes a vertical shaft between the fork 141 and the wheel plate 113.

Figures 1 and 2 also show a series of sleeves 130 located on all four sides of the chassis 110. Sleeves 130 on a single mating interface act between the chassis 110 and the handle 120. The sleeves 130 are designed to receive a corresponding tip 122 on the handle 120 detachable and therefore detachable. in a repetitive manner. In the illustrated embodiment of the technical solution, each of the four side faces 150 has two such sleeves 130, although the carriage can only be constructed with one or more sleeves on each side. The sleeve 130 may be constructed as a channel extending through the profile of the frame 111. The channel may have a profile which is installed in an accessible opening in the frame and secured thereto, for example by welding. The channel opens onto the side surface of the frame 111, thus ensuring insertion and removal from the side. The profile of the sleeve 130 can continue through the frame 111 so as to leave the upper and lower surfaces of the frame 111 free of obstacles that would complicate the loading or manipulation of the motor handling equipment. The flat upper and lower surfaces, in other words, make the chassis 110 more helpful to engage from above, respectively. from below. The secondary function of the sleeve 130 is to penetrate the frame 111 to extend the contact area between the chassis 110 and the tip 122 of the handle 120.

Figure 2 shows the general construction of the handle 120. The handle 120 has a rod 121 constructed in a C or U shape to provide a gripping interface for the user. Therefore, it is advantageous to make a rod

SK 9455 Υ1

121 had a sufficient vertical range. The lower ends of the rod 121 are characterized by spikes 122 that extend generally at right angles to the rod 121. The spikes 122 act as a second counterpart to the coupling interface between the chassis 110 and the handle 120. Theoretically, the handle can be constructed with only one tip , but two or more tips are preferred for stability.

Figure 4 shows the tips 122 in more detail. As can be seen, the tip 122 may take the form of a simple protrusion extending from the rod 121. The tip 122 is attached to the rod 121, thereby maintaining a mutual orientation between the tip 122 and the rod 121 during use. The tip 122 is preferably shaped to be easily inserted and withdrawn from the sleeve 130. To serve this purpose, the tip of the tip 122 is preferably ground as bevelled as rounded. Tip 122 may also be relatively thin and flat.

Figure 4 further shows a latch 123 connected to the tip 122 by a shaft 127. The latch 123 by a similarly relatively thin and flat piece which is pivotally connected to the tip 122 to also extend from the rod 121. Unlike the tip 122, the orientation of the latch 123 relative to the rod 121 and thus to the tip 122, can be rotated about the shaft 127. The shaft 127 can take the form of a simple bolt extending through aligned holes on the latch 123 and the tip 122. The apex of the latch 123 is shaped to selectively engage the sleeve 130. Similar to the tip 122, the top of the latch may be ground, beveled or rounded, to be easily inserted into the sleeve 130. According to the example shown, the top includes a tooth 124, the function of which will be apparent later. The tooth 124 includes a cam extension to form an edge on the latch 123. Figure 4 shows the latch in an engaged condition in which the tooth 124 of the latch 123 continues beyond the respective edge of the tip 122.

The other end of the latch 123 is characterized by a holder 129 for receiving a biasing element 170, such as a spring, to force the latch 123 into engagement. The biasing member 170 is shown exclusively in Figure 8. One end of the biasing member may be wound around or otherwise attached to an eye-shaped holder 19, while the other end may be attached to a stationary handle 120, such as an opening (shown but not indicated in Figures 3). , 4 and 8) secured to the cross member 126 in the handle 120. To provide clearance for the biasing member, the tip 122 may be provided with an opening 128 to prevent scrubbing and therefore friction between the latch 123 and the tip 122. Alternatively or in addition the biasing member. the element can be secured to the shaft between the latch and the tip (not shown in the figures).

Because the handle 120 preferably includes two latches 123 for the respective two pins 122, the lever 125 connecting the latches 123 may be at a point remote from the shaft 127 so that when the lever 125 is moved, for example, by foot, the force applied to the lever 125 is effectively converted to rotation of the latches 123. It is indeed advantageous that the rod 121 comprises one or more generally upright sections which are connected to a transverse section which is elevated from the chassis 110. By means of a lever 125 located at the lower end of the rod 121 opposite the transverse section, the latch ( the latches 123 can operate the legs while holding the rod 121 at an ergonomic height with the hands. The cross member 126 preferably connects the free ends of the rod 121 for increased rigidity. The rear end of the latch 123 may include shapes that engage the cross member 126 to limit rotational movement of the latch 123. In the example shown in Figure 5, the lower rear stop engages the cross member 126 to limit rotation of the latch 123 about the shaft 127 to the engaged state shown therein. In the example of Figure 6, the upper stop engages the cross member 126 to limit the rotation of the latch 123 about the shaft 127 to the released state shown therein.

Let now turn to the interaction between the chassis 110 and the handle 120 by monitoring the installation of the handle 120. Figures 2, 4 and 5 show the handle completely disconnected from the chassis 110. The latch 123 is in an engaged state in which the tooth 124 extends beyond the adjacent side edge of the tip 122. When the respective tips of the tip 122 and the latch 123 are inserted into the sleeve 130, the beveled tip of the latch 123 pushes the latch 123 to rotate about the shaft 127 against the potential force of the selectable biasing member. This intermediate position is shown in Figure 6, which also shows how the lever 125 and the cross member 126 are brought into close proximity to rotate the latch 123. Figure 6 shows the latch 123 in a released state in which the tooth 124 does not extend beyond the adjacent side edge of the tip 122.

After the handle 120 has been pushed far enough toward the chassis 110, the tooth 124 of the latch 123 appears on the other side of the sleeve 130 and it is clear that it engages the end face of the sleeve 130, as shown in Figures 3 and 6. Now the lever 125 and the cross member 126 returns to its original distance from each other. Latch 123 also returns to the engaged state. The tooth 124 prevents the tip 122 from pulling out without moving the latch 123 to the released state. Figures 3 and 6 also show how the fit between the tip 122 and the sleeve 130 is relatively tight to eliminate excessive play between the handle 120 and the chassis 110. The same is true for the fit between the latch 123 and the sleeve 130.

The handle 120 can be released by first bringing the latch 123 out of engagement (Figures 3 and 6) into a released state by pushing the lever 125 down to the cross member 126. The push rotates the latch 123 relative to the tip 122 about the shaft 127, thereby lifting the top of the latch 123 so to disengage the tooth 124 from engagement with the sleeve 130. With the tooth 124 raised, the latch 123 is in a released state, so it no longer prevents the tip 122 from being pulled out of the socket 130. The handle 120 is then simply pulled out at the side 150 to which it was attached. The handle 120 can be reattached to the same side 150 or to a different side of the handpiece

SK 9455 Υ1 trolley 100.

Several variants of the described embodiments of the technical solution can be assumed. As shown in Figure 3, the cooperating shapes between the sleeve 130 and the latch 123 are a simple tooth-end edge connection. A predictable variant of such direct engagement may be a suspended pin connection, in which the latch may comprise a pin extending from the tip and deflected against the tip. The tip can be made of a hollow profile to accommodate a mechanism for springing and retracting the pin. The release of the pin from the sleeve can be manipulated by pushing with a finger or by inventing a cam lifting mechanism in the tip profile, which would be operated from the end of the handle bar.

Another possibility would be to replace the manipulated latch with a single through hole to the end portion of the tip to align with the hole on the sleeve shown in Figure 3. The tip could be secured to the sleeve by a pin inserted through the aligned holes.

Yet another option would be to secure the tip tip with an end plug shaped and sized to fit over the sleeve in one position and not fit in another. The end plug could be mounted to the tip in a manner that allows for twisting to rotate between a pass-through orientation and a pass-through orientation. Such a fit could be devised with a short thread, such as a bayonet, between the plug and the tip. Such a connection could be equipped with a spring-loaded plug to prevent the passage. To insert or remove the handle, the user would simply twist the end plug from a transition-preventing orientation to a transition-permitting orientation to insert the tip or pull it out of the sleeve.

Other alternatives may be envisaged by a qualified person.

SK 9455 Υ1

List of reference marks

100 hand truck

110 chassis

111 frame

112 intermediate element

113 wheel plate

114 wheel spring

115 corner beam

120 handle

121 bar

122 tip

123 latch

124 tooth

125 lever

126 cross member

127 oska

128 management

129 holder

130 sleeve

140 swivel castor

150 pages

160 corner support

170 prestressing element

Claims (10)

PROTECTION REQUIREMENTS A hand truck (100) comprising: a chassis (110) having a four-sided shape and a detachable handle (120) comprising at least one tip (122), characterized in that it comprises at least one sleeve (130) located on four sides (150) a chassis (110) for detachably and repeatedly receiving at least one tip (122). Hand truck (100) according to claim 1, characterized in that the chassis (110) comprises a frame (111) with a side surface defining the circumference of the chassis (110), at least one sleeve (130) being located on each side (150). ) as a channel that opens to the side surface. Hand truck (100) according to claim 1 or 2, characterized in that the detachable handle (120) comprises at least one latch (123) which comprises a counter-shaped end, such as a tooth (124), which is configured to engage the counterpart on at least one sleeve (130) when the latch (123) is engaged. Hand truck (100) according to claim 3, characterized in that the latch (123) is connected to the tip (122) by means of an axle (127) intended to ensure rotation between the engaged and released state. Hand truck (100) according to claims 3 or 4, characterized in that the handle (120) comprises a biasing element which is configured to push the latch (123) into engagement. Hand truck (100) according to any one of the preceding claims, characterized in that the handle (120) comprises a rod (121) for securing a grip for the user, the at least one tip (122) extending from the rod (121). Hand truck (100) according to claim 6, characterized in that each side (150) of the chassis (110) comprises two sleeves (130), the handle (120) comprises respective two spikes (120), the rod (121) connects two prongs (120). A hand truck (100) according to claim 7, characterized in that the handle (120) comprises: two such latches (123) located on said two spikes, in this manner, and a lever (126) connecting the latches (123). Hand truck (100) according to any one of the preceding claims 3 to 8, characterized in that the handle (120) comprises at least one latch (123) provided on at least one tip (122), the at least one latch (123) being configured for handling between an engaged condition in which at least one spike (122) cannot be pulled out of the sleeve (130) and a released condition in which at least one spike (122) cannot be pulled out of the sleeve (130). A hand truck (100) according to any one of the preceding claims, wherein the hand truck (100) comprises exclusively swivel wheels (140) mounted on the chassis (110).