CN107687296B

CN107687296B - Lockset, pallet box with lockset and method for carrying out surface treatment on pallet box

Info

Publication number: CN107687296B
Application number: CN201610638178.8A
Authority: CN
Inventors: 苏继军; 刘春良; 宋世安
Original assignee: China International Marine Containers Group Co Ltd; CIMC Containers Holding Co Ltd; Dalian CIMC Logistics Equipment Co Ltd; Dalian CIMC Special Logistics Equipment Co Ltd
Current assignee: China International Marine Containers Group Co Ltd; Dalian CIMC Logistics Equipment Co Ltd; CIMC Transpack Technology Co Ltd
Priority date: 2016-08-05
Filing date: 2016-08-05
Publication date: 2020-05-12
Anticipated expiration: 2036-08-05
Also published as: CN107687296A

Abstract

The invention provides a lockset, a tray box with the lockset and a method for carrying out surface treatment on the tray box. A lock is used for a pallet box. The tray box includes a first connector and a second connector. The lock includes: a lock base and a lock rod. The lock seat is used for being fixedly connected to the first connecting piece, and the lock seat is provided with a lock rod installation part. The first end of the lock rod is provided with a hook head used for locking the first connecting piece and the second connecting piece, and the lock rod is detachably arranged in the lock rod mounting part. The lock is simple in structure, low in cost, convenient to operate, detachable and part-replaceable, solves the technical problems that when the existing hook lock is used for a tray box, the lock needs to be welded after the frame of the tray box is subjected to hot-dip galvanizing treatment, and then refinishing paint is coated on the lock and the tray box, improves the anti-corrosion capacity of the tray box, and enables the appearance of the tray box to be attractive and the lock rod to be replaceable.

Description

Lockset, pallet box with lockset and method for carrying out surface treatment on pallet box

Technical Field

The invention relates to the technical field of containers, in particular to a lockset, a pallet box with the lockset and a method for carrying out surface treatment on the pallet box.

Background

Common pallet box locks can be divided into straight locks and hook locks. The lock rod of the direct lock is a round rod and is arranged in the supporting hole of the lock base in a penetrating mode, the lock rod and the lock base can be designed into a detachable connecting structure according to needs, but the direct lock can only lock in the direction perpendicular to the lock rod. The hook lock is based on the straight lock, and the head of the lock rod is provided with a hook for locking the connected piece. The head of the lock rod is provided with a hook, so that the lock rod can be locked in a direction perpendicular to the lock rod and can also be locked in a direction parallel to the lock rod. However, when the locking bar of the hook lock is mounted to the lock housing, it is difficult to remove the locking bar.

In practice, the pallet box frame and its locks usually require a surface treatment by hot dip galvanizing. There are two common practices. One is to weld the installed lockset to the frame of the tray box and then carry out hot dip galvanizing surface treatment together with the tray box. However, this method easily causes problems such as lock missing plating and inflexible locking lever movement. The other method is to weld the lock after electrogalvanizing and the pallet box frame after hot dipping galvanizing, and then to coat repair paint on the lock and the pallet box frame. The disadvantage of this process is that the lock post-welding will damage the galvanized surfaces of the lock and the pallet box frame, which can reduce the corrosion resistance of the lock and pallet box frame, and the refinish paint can make the pallet box unsightly.

In addition, to facilitate loading and unloading of goods and installation of lining bags inside the body of the pallet box, the pallet box is usually provided with a half-folding door. The half-folding door is generally provided in the upper half of the wall of the pallet box and is folded downward when opened. As shown in fig. 1, the half-folding door 4 is provided with a lock 2 connected to an adjacent member (end wall frame or side wall, top cover). As shown in fig. 2 to 4, when the lock 2 is opened, the handle 3 of the lock 2 protrudes out of the half-folding door 4. Although the handle of some tool to lock has limit structure after opening, the operator often can forget to carry out spacing or the troublesome illegal operation of carrying on spacingly to the handle of tool to lock to make the handle pop out half a folding door outside. When the semi-folding door is turned down, the handle will impact the lower structure of the end wall and damage the semi-folding door.

To reduce logistics transportation and storage costs, the pallet boxes are usually made collapsible. As shown in fig. 5, the tray box 1 is generally composed of a bottom tray 5, two end walls 6, two side walls 7 and a top cover 8. The top cover 8 is hinged with the upper end of the side wall 7, and the two end walls 6 and the two side walls 7 are respectively hinged with the bottom plate 5, so that the top cover 8, the end walls 6 and the side walls 7 can be folded and placed on the bottom plate 5. The end wall 6 of the tray box 1 is also provided with a lock 2 for locking the top cover 8 and the end wall 6 together. When folding the tray box 1, it is necessary to first open the locks 2 of the end walls 6 to which the top cover 8 is attached, place the top cover 8 upside down outside the side walls 7, then open the connecting locks 9 of the end walls 6 and the side walls 7, fold the two end walls 6 over the bottom tray 5, and fold the two side walls 7 over the end walls 6. As shown in fig. 6 and 7, when the lock 2 connected to the top cover 8 on the end wall 6 is opened, the handle 3 of the lock 2 protrudes outside the end wall 6. Even the handle of a few tool to lock has limit structure after opening, but the operator often can forget to carry out spacing or the troublesome illegal operation of tool to lock handle and do not carry out spacingly. The handle 3 of the lock 2 is easy to turn over and lap on the lock bracket 10, or the handle 3 of the lock 2 is not pressed into the limit space and is supported by the limit part, and the handle 3 of the lock 2 can extend out of the end wall 6. As shown in fig. 8, when the tray case 1 is folded, the handle 3 of the lock 2 on the end wall 6 is supported after the two end walls 6 are laid down, so that the side wall 7 falls down on the supported handle 3, which may cause damage to the handle 3 or the structure of the side wall 7.

In order to solve the problems, a spring lock is provided in the prior art, the handle is always leaned against each box wall of the tray box under the action of the spring, and the tray box cannot be damaged due to the fact that the handle extends out of the box walls or is supported by the box walls. However, in the spring lock in the prior art, the lock rod or the spring cannot be detached, and the lock rod or the spring of the spring lock cannot be replaced after being damaged.

Therefore, it is desirable to provide a lock for a pallet box and a pallet box having the same to at least partially solve the above problems.

Disclosure of Invention

The present invention is directed to solving, at least in part, the above problems in the prior art.

According to one aspect of the invention, a lock is provided for a pallet box. The tray box includes a first connector and a second connector. The lock includes: a lock base and a lock rod. The lock seat is used for being fixedly connected to the first connecting piece, and the lock seat is provided with a lock rod installation part. The first end of the lock rod is provided with a hook head used for locking the first connecting piece and the second connecting piece, and the lock rod is detachably arranged in the lock rod mounting part.

Preferably, the lock holder is surface-treated together with the tray box after being fixedly connected to the first connecting member, and the lock lever, which is separately surface-treated, is assembled to the lock holder.

Preferably, the locking rod mounting part is a mounting groove in which the locking rod can be mounted.

Preferably, the mounting groove is a U-shaped groove with an opening, the U-shaped groove comprises a first straight wall and a second straight wall, and the length of the first straight wall is equal to the length of the second straight wall. With this arrangement, the installation groove can be conveniently processed.

Preferably, the mounting groove is a U-shaped groove with an opening, the U-shaped groove comprises a first straight wall and a second straight wall, and the length of the first straight wall is greater than that of the second straight wall. In this arrangement, the lock lever can be installed from the height difference region of the first and second straight walls, making the installation of the lock lever easier.

Preferably, the lock further comprises a closure member located between the locking bar and the opening when the locking bar is mounted to the U-shaped channel. In this arrangement, the lock rod can be restricted from moving toward the opening of the U-shaped groove, so that the lock rod can only rotate and move in the axial direction in the U-shaped groove.

Preferably, the locking rod mounting part is provided with a first through hole, and the closing part is a screw or a pin which can detachably penetrate through the first through hole.

Preferably, the tool to lock still includes the torsional spring that can axial compression, the first end of torsional spring is connected to the locking lever, the second end of torsional spring relative with first end is connected to the lock seat. In this arrangement, the handle can be caused to abut against the first link under the force of the torsion spring.

Preferably, the locking lever installation portion includes two the mounting groove, two form torsional spring installation space between the mounting groove, the torsional spring sets up in the torsional spring installation space, the lock seat is still including being used for connecting two the connecting plate of mounting groove. With this arrangement, the installation of the torsion spring can be facilitated.

Preferably, the lock base further comprises a reinforcing rib, and the reinforcing rib is arranged on the connecting plate and used for reinforcing the strength of the connecting plate.

Preferably, a hook head mounting part is formed between at least one side of the reinforcing rib and the first connecting member. By the arrangement mode, interference between the hook head and the reinforcing rib in the installation process of the lock rod can be avoided.

Preferably, the locking rod is provided with a torsion spring fixing hole, and the first end of the torsion spring is fixedly connected to the torsion spring fixing hole.

Preferably, the lockset further comprises an elastic cylindrical pin, and the first end of the torsion spring is fixedly connected with the torsion spring fixing hole through the elastic cylindrical pin.

Preferably, a second end of the lock rod opposite to the first end is provided with a handle having a bent portion. With the arrangement, the operation of the user can be facilitated

Preferably, the locking bar mounting part is provided with a chamfer at least at a bottom portion of one end close to the handle. The chamfer can be matched with the bending part of the handle, so that the contact area is increased, and the axial stress of the lock rod is facilitated.

According to another aspect of the present invention, there is also provided a pallet box. The pallet box comprises any one of the locks.

According to still another aspect of the present invention, there is provided a method of surface-treating the above-described tray box, the method comprising the steps of: a1) fixedly connecting a lock seat of the lock to the pallet box; a2) carrying out surface treatment on the lock seat and the tray box together; a3) carrying out surface treatment on a lock rod of the lockset; and a4) mounting the surface-treated lock bar to the lock holder.

Preferably, in step a1), the latch receptacles are welded to the pallet box.

Preferably, in step a2), the key holder is hot-dip galvanized together with the pallet box.

Preferably, in the step a3), the lock bar is subjected to a plating surface treatment or a hot-dip galvanizing surface treatment.

Based on the technical scheme, compared with the prior art, the invention has the following beneficial effects:

the lockset for the tray box has the advantages of simple structure, low cost, convenient operation, detachability and replaceable parts, solves the technical problems that when the existing hook lock is used for the tray box, the framework of the tray box needs to be subjected to hot dip galvanizing treatment and then welded with the lockset, and then the lockset and the tray box are coated with refinishing paint, improves the anti-corrosion capability of the tray box, enables the appearance of the tray box to be attractive, and can replace a lock rod. To the technical scheme who has the torsional spring, still realized the removable of torsional spring and locking lever, reduced cost of maintenance, avoided the damage that handle striking tray case brought.

Drawings

The following drawings of embodiments of the invention are included as part of the present invention for an understanding of the invention. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. In the drawings, there is shown in the drawings,

FIG. 1 is a perspective view of a prior art pallet box;

FIG. 2 is an enlarged view of portion A of FIG. 1, wherein the latch is in an open position;

fig. 3 is a perspective view of a conventional tray box in which a half-folding door is in an open state;

FIG. 4 is a right side view of the prior art pallet box of FIG. 3;

FIG. 5 is another perspective view of a prior art pallet box;

FIG. 6 is a first enlarged fragmentary view of the latch of FIG. 5 in an open condition;

FIG. 7 is a second enlarged partial view of the latch of FIG. 5 in an open position;

FIG. 8 is a structural view of the tray box of FIG. 5 in a collapsed state with the end walls in a collapsed state;

FIG. 9 is a partial structural schematic view of a tray box according to a first preferred embodiment of the present invention;

FIG. 10 is a schematic view of the connection structure of the lock shown in FIG. 9;

FIG. 11 is a partial schematic structural view of the portion of the housing shown in FIG. 9;

FIG. 12 is a perspective view of a latch base of the latch of FIG. 9;

FIG. 13 is a left side elevational view of the latch holder illustrated in FIG. 12;

FIG. 14 is a left side cross-sectional view of the latch base of FIG. 12 with the closure engaged with the latch base;

FIG. 15 is a perspective view of the locking lever shown in FIG. 9;

FIG. 16 is a schematic structural view of a lock according to a first preferred embodiment of the present invention, wherein the lock is in an open state and the hook head is located within the first upright;

FIG. 17 is a schematic structural view of a lock according to a first preferred embodiment of the present invention, wherein the hook head is in an open position and within the first upright;

FIG. 18 is a schematic structural view of a lock according to a first preferred embodiment of the present invention, wherein the hook head is in an open position and is located within the second upright;

FIG. 19 is a schematic structural view of a lock according to a first preferred embodiment of the present invention, wherein the lock is in a locked state;

FIG. 20 is a partial schematic structural view of a tray box according to a second preferred embodiment of the present invention;

FIG. 21 is a schematic view of the connection structure of the lock shown in FIG. 20;

FIG. 22 is a partial schematic structural view of the portion of the housing shown in FIG. 20;

FIG. 23 is a perspective view of a latch base of the latch of FIG. 20;

FIG. 24 is a left side elevational view of the latch holder illustrated in FIG. 23;

FIG. 25 is a left side cross-sectional view of the latch base of FIG. 23 with the closure engaged with the latch base;

FIG. 26 is a perspective view of the lock lever shown in FIG. 20;

FIG. 27 is a perspective view of the torsion spring illustrated in FIG. 20;

FIG. 28 is a schematic structural view of a second preferred embodiment of the lock according to the present invention, wherein the lock is in an open state and the hook head is located within the first upright;

FIG. 29 is a schematic structural view of a lock according to a second preferred embodiment of the present invention, wherein the hook head is in an open position and within the first upright;

FIG. 30 is a schematic structural view of a lock according to a second preferred embodiment of the present invention, wherein the hook head is in an open position and is located within the second upright;

FIG. 31 is a schematic structural view of a lock according to a second preferred embodiment of the present invention, wherein the lock is in a locked state;

FIG. 32 is a further schematic view of a lock according to a second preferred embodiment of the present invention;

FIG. 33 is a schematic structural view of a pallet box according to a second preferred embodiment of the present invention;

FIG. 34 is an enlarged view of a portion B of FIG. 33;

FIG. 35 is a schematic structural view of another tray box according to a second preferred embodiment of the present invention; and

fig. 36 is a partially enlarged view of portion C of fig. 35.

Description of reference numerals:

1. 100, 200, 300

pallet boxes

2, 110, 210, 310 lockers

3 handle 4, 392 half-folding door

5. 280, 380

chassis

6, 220', 320 end wall

7. 230', 330

side walls

8, 290, 390 roof

9 connect tool to lock 10 lock supports

120. 220 first connecting

piece

122, 222', 322 crossbeam

121. 221, 221 'first upright post 123, 223' first long through hole

130. 230 second connecting piece 131, 231' second upright post

132. 232, 232' second long through

hole

140, 240 lock seat

141. 241 first locking

bar mounting groove

142, 242 second locking bar mounting groove

143. 243 first through

hole

144, 244 second through hole

145. 245 enclose the

cavities

146, 246, 346 connecting the plates

147. 247 first

straight wall

148, 248 second straight wall

150. 250

closure member

151, 251 first screw

152. 252

second screw

160, 260, 360 locking bar

161. 261

hook

162, 262 handle

224 shroud 249 stiffeners

253 hook head mounting groove 254 torsion spring mounting space

263 torsion spring fixing hole 264 elastic cylindrical pin

270 torsion spring 271 first end of torsion spring

272 second end of the torsion spring

255 lock rod installation space

1401. 2401 chamfering

321 upright post

391 Long side Beam

393 short side beam

Detailed Description

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like are used herein for purposes of illustration only and are not to be construed as limiting.

First embodiment

Fig. 9 to 19 schematically show a locker 110 for the pallet box 100 according to a first preferred embodiment of the present invention.

As shown in fig. 9, the tray case includes a first connector 120 and a second connector 130, the first connector 120 may be an end wall or a portion of a side wall of the case body of the tray case, and the second connector 130 may be a side wall or a portion of an end wall connected to the first connector 120 (the end wall or the side wall). Further, the first connector 120 may also be a portion of a half-folded door of the tray box, and accordingly, the second connector 130 may be a portion of an end wall, a side wall, or a top cover adjacent to the half-folded door. The following description will be made in detail by taking as an example a case where the first link 120 and the second link 130 are an end wall and a side wall of the tray case, respectively.

As shown in fig. 9, the first connecting member 120 includes a first upright 121 and a cross member 122, the first upright 121 is fixedly connected with the cross member 122, and the first upright 121 and the cross member 122 are at 90 °. As shown in fig. 10, in the present embodiment, the first column 121 is a square tube. Of course, it will be appreciated that in other embodiments of the invention not shown, the first upright could also be a cylindrical tube or other shaped tube. In addition, the first upright column can also be angle steel, channel steel or the like. The first upright 121 is provided with a first long through-hole 123 (as an example of a "first aperture") having a size in a vertical direction larger than that in a horizontal direction so that the hook head 161 of the lock lever 160 can pass through the first long through-hole 123. Of course, it is to be understood that the shape of the first aperture is not limited to the illustrated embodiment, and the first aperture may even be an irregularly shaped aperture. As shown in fig. 11, the second connecting member 130 includes a second upright 131, and in this embodiment, the second upright 131 is also a square tube. It will be appreciated that in other embodiments of the invention not shown, the second upright may also be a cylindrical tube or other form of tube. In addition, the second upright post can also be angle steel, channel steel or the like. The second upright 131 is provided with a second long through hole 132 (as an example of a "second hole") at a corresponding position corresponding to the first long through hole 123, so that the hook head 161 of the lock lever 160 passes through the first long through hole 123 and then passes through the second long through hole 132, so that the first connecting member 120 and the second connecting member 130 are connected together by the lock 110. Specifically, in the present embodiment, the second long through hole 132 matches the shape of the first long through hole 123, and its size in the vertical direction is also larger than that in the horizontal direction. Of course, it will be appreciated that the shape of the second aperture is not limited to the illustrated embodiment, and that the second aperture may even be an irregularly shaped aperture.

The lock for the tray box according to the present invention will be described in detail with reference to fig. 9 to 15. As shown in fig. 9 and 10, latch 110 includes a latch base 140, a closure member 150, and a latch rod 160. The lock housing 140 is fixedly connected to the first connector 120. Specifically, in the present embodiment, the top of the lock base 140 is fixedly connected to the bottom of the cross beam 122 of the first connecting member 120, the side of the lock base 140 is fixedly connected to the side of the first upright 121 of the first connecting member 120, and the lock base 140 is located at the connection position of the cross beam 122 and the first upright 121. As shown in FIG. 12, lock holder 140 is provided with a locking bar mounting portion, shown as a locking bar mounting slot. Specifically, in the present embodiment, the locking lever mounting part includes two locking lever mounting grooves of an upward opening U-shape, i.e., a first locking lever mounting groove 141 and a second locking lever mounting groove 142. The first and second locking

bar installation grooves

141 and 142 are provided in the form of U-shaped grooves, which is not only beautiful but also convenient to process. The first locking bar mounting groove 141 and the second locking bar mounting groove 142 are connected by a connection plate 146. The bottoms of the first and second locking

bar installation grooves

141 and 142 are provided with chamfers 1401. In the embodiment, the chamfer at the bottom of the first lock rod installation groove 141 may match the shape of the bending part of the handle 162 of the lock rod 160 to increase the contact area, which is beneficial to the axial force of the lock rod. And since the bottom of both the first and second locking

bar installation grooves

141 and 142 are provided with the chamfers 1401, it is possible to make the lock holder 140 versatile, that is, the symmetrical locksets at both upper corners of the end wall can use the versatile lock holder 140 to avoid using a wrong lock holder. It will be appreciated that in a symmetrical lock, the chamfer at the bottom of the second mounting groove matches the shape of the bend of the handle of the locking bar. It should be noted that, in other embodiments of the present invention, which are not shown, a chamfer may be provided at the bottom of only one of the first and second locking

bar mounting grooves

141 and 142.

The first locking bar installation groove 141 is provided with a first through hole 143, and the second locking bar installation groove 142 is provided with a second through hole 144. As shown in fig. 10, the closing member 150 includes a first screw 151 detachably passed through the first through hole 143 and a second screw 152 detachably passed through the second through hole 144, the first screw 151 detachably passed through the first through hole 143 to be connected with the first lock lever mounting groove 141 such that a portion of the first screw 151 is located in the first lock lever mounting groove 141 and above the lock lever 160, i.e., between the lock lever 160 and the opening of the first lock lever mounting groove 141 in the first lock lever mounting groove 141 to close the opening of the first lock lever mounting groove 141 to form a closed cavity 145 between the first lock lever mounting groove 141 and the first screw 151. The second screw 152 detachably passes through the second through hole 144 to be connected with the second locking rod installation groove 142 such that a portion of the second screw 152 is positioned in the second locking rod installation groove 142 and above the locking rod 160, i.e., between the locking rod 160 and the opening of the second locking rod installation groove 142 in the second locking rod installation groove 142 to close the opening of the second locking rod installation groove 142 to form a closed cavity 145 between the second locking rod installation groove 142 and the second screw 152. It should be noted that the term "closing the cavity" herein does not mean absolute closing, but means that the first screw 151 and the second screw 152 close the openings of the first locking bar mounting groove 141 and the second locking bar mounting groove 142 in the opening directions of the first locking bar mounting groove 141 and the second locking bar mounting groove 142, respectively.

The locking bar installation groove according to the first embodiment of the present invention will be described in detail with reference to fig. 13 and 14. Since the first and second locking

bar installation grooves

141 and 142 have the same structure, the following description will be given only taking the first locking bar installation groove 141 as an example.

As shown in fig. 13 and 14, the first lock bar mounting groove 141 includes a first straight wall 147 and a second straight wall 148, and the height H1 of the first straight wall 147 is the same as the height H2 of the second straight wall 148. The first and second

straight walls

147 and 148 are connected to the first connector 120 by welding, and a distance between the first and second straight walls 147 and 148 (i.e., a width of the U-shaped groove) is greater than a diameter of the locking bar 160, so that the locking bar 160 is received in the locking bar installation groove. The first screw 151 is coupled to the first locking bar mounting groove 141 through the first through hole 143 to form a closed cavity 145, and the closed cavity 145 may receive the locking bar 160.

As shown in fig. 10 and 15, the lock lever 160 includes a hook head 161 and a handle 162, the hook head 161 being disposed at a first end of the lock lever 160, and the handle 162 being disposed at a second end opposite to the first end of the lock lever 160. The hook head 161 is oriented in a direction perpendicular to the handle 162, and the shape of the hook head 161 matches the first and second long through

holes

123 and 132, so that the hook head 161 can pass through the first and second long through

holes

123 and 132 in an unlocked state of the lock. Thus, it can be understood that in the unlocked state of the lock open, the dimension of the hook head 161 in the vertical direction is greater than the dimension in the horizontal direction. The handle 162 may be a bent piece to facilitate grasping by an operator. The opening directions of the first and second locking

lever mounting grooves

141 and 142 are both directed to the opposite direction of the handle 162. The locking bar 160 is detachably disposed in the locking bar mounting part, i.e., the first and second locking

bar mounting grooves

141 and 142. Specifically, in the present embodiment, the lock lever 160 is movably and rotatably disposed in the closed cavity 145 of the first and second lock

lever mounting grooves

141 and 142, that is, the lock lever 160 can be both rotated in the closed cavity 145 and moved in a direction from the hook head 161 to the handle 162 or a direction from the handle 162 to the hook head 161 within the closed cavity 145. When the handle 162 abuts against the case, the hook head 161 is perpendicular to the first and second long through

holes

123 and 132 in the locked state of the lock, i.e., the hook head 161 is rotated 90 degrees with respect to the unlocked state of the lock in which the lock is open, so that the size of the hook head 161 in the horizontal direction is larger than that in the vertical direction, so that the hook head is locked with the second long through hole 132 in the locked state of the lock. After the lock is unlocked, when the handle 162 abuts against the box body, the first long through hole 123 blocks the hook head, and the lock rod 160 does not spontaneously extend out of the outer side of the first upright post 121 to affect the folding of the pallet box 100

When the pallet box 100 is produced, the top of the lock base 140 is welded to the bottom of the cross beam 122 of the first connecting member 120, the side of the lock base 140 is welded to the side of the first upright 121 of the first connecting member 120, the lock base 140 and the first connecting member 120 are subjected to a hot dip galvanizing treatment, and the lock bar 160 and the closing member 150 which are subjected to the electroplating surface treatment or the hot dip galvanizing surface treatment are installed after the hot dip galvanizing treatment. When the locking bar 160 is installed, the hook head 161 faces upward and faces the first locking bar installation groove 141 and the second locking bar installation groove 142, then the locking bar 160 is inserted into the first locking bar installation groove 141 and the second locking bar installation groove 142, the locking bar 160 is pushed to make the hook head 161 extend into the first long through hole 123 of the first upright post 121, and then the handle 162 leans on the first connecting member 120. The first and

second screws

151 and 152 are then installed into the first and second through

holes

143 and 144, respectively, to complete the installation of the lock 110.

When the lock 110 is to be removed, the first screw 151 and the second screw 152 are removed from the first through hole 143 and the second through hole 144, respectively. When the lock bar 160 is disassembled, the lock bar 160 is rotated to a position where the hook head 161 can be separated from the first long through hole 123 of the first upright post 121, then the lock bar 160 is pulled to make the hook head 161 retreat into the second lock bar installation groove 142 and the first lock bar installation groove 141, and then the lock bar 160 is removed from the first lock bar installation groove 141, thereby completing the disassembling of the lock bar 160.

Specifically, as shown in fig. 16, the lock 110 is in an open state, the handle 162 is drooped down by gravity, and the hook 161 is located inside the first upright 121. When locking the lock 110, as shown in fig. 16-19, the operator operates the handle 162 to lift the handle 162 away from the first connecting member 120, so that the hook head 161 is rotated to a position where it can move out of the first through-hole 123 of the first upright 121, and pushes the handle 162 to make the hook head 161 extend out of the first through-hole 123 of the first upright 121, so as to extend into the second through-hole 132 of the second upright 131 of the second connecting member 130. The handle 162 is then pressed against the first link 120 so that the hook head 161 of the lock lever 160 hooks the edge of the second long through hole 132 of the second pillar 131. Meanwhile, the handle 162 is stopped and limited by the end surface of the first locking bar mounting groove 141 of the lock holder 140, so that the locking bar 160 cannot move in the direction of the hook head 161 any more. Thereby accomplishing the coupling of the locker 110 to the first coupling member 120 and the second coupling member 130.

Of course, the procedure for unlocking the lock is as shown in fig. 19-16, the procedure for unlocking is opposite to the procedure for locking, the operator operates the handle 162 to lift the handle 162 away from the first connecting member 120, so that the hook 161 is rotated to a position where it can move out of the second long through hole 132 of the second upright 131, pulls the handle 162 to move the hook 161 of the lock lever 160 out of the second long through hole 132 of the second upright 131 of the second connecting member 130, moves into the first upright 121 of the first connecting member 120, and then releases the handle 162, so that the handle 162 naturally hangs down under the action of gravity, thereby completing the unlocking of the lock 110.

It should be noted that although the lock lever mounting portion is shown as a lock lever mounting groove in the present embodiment, the lock lever mounting portion may be shown in other forms such as a hollow cylindrical member having a shaped hole. Although in the present embodiment the locking bar mounting slot comprises two U-shaped slots connected by a web 146, it will be appreciated that the locking bar mounting slot may be a single long U-shaped slot. In addition, the lock base 140 may be in other forms, such as the lock base 140 may be a flat tube.

Further, it should be noted that although the openings of the first and second lock

bar mounting grooves

141 and 142 are shown upward in the present embodiment, it is understood that the openings of the first and second lock bar mounting grooves may be downward, and the closing member is disposed between the openings of the first/second lock bar mounting grooves and the lock bar below the lock bar. In addition, although in the present embodiment, the closing member 150 is shown as a screw, it is understood that the closing member 150 may be other detachable parts such as a pin or a plate-shaped member by being slidably engaged to the first and second locking bar installation grooves, etc.

The lockset of the embodiment has the advantages of simple structure, low cost, convenient operation, detachability and part replacement, solves the technical problems that when the existing hook lock is used for a tray box, the lockset needs to be welded after the frame of the tray box is subjected to hot dip galvanizing treatment, and then refinishing paint is coated on the lockset and the tray box, so that the anti-corrosion capability of the tray box is improved, the appearance of the tray box is attractive, meanwhile, a lock rod can be replaced, and the maintenance cost of the tray box is reduced.

Second embodiment

Fig. 20 to 32 schematically show a locker 210 for a pallet box 200 according to a second preferred embodiment of the present invention.

As shown in fig. 20, the latch 210 also includes a torsion spring 270. The torsion spring 270 is axially compressible. As shown in fig. 23, the lock holder 240 includes a coupling plate 246 and a locking bar installation groove including a first locking bar installation groove 241 and a second locking bar installation groove 242, and the first locking bar installation groove 241 and the second locking bar installation groove 242 are coupled by the coupling plate 246. A torsion spring mounting space 254 is formed between the first locking bar mounting groove 241 and the second locking bar mounting groove 242, and a torsion spring 270 is positioned between the first locking bar mounting groove 241 and the second locking bar mounting groove 242. The bottoms of the first and second locking

bar mounting grooves

241 and 242 are each provided with a chamfer 2401 to match the shape of the bent portion of the locking bar 260.

A locking bar installation groove according to a second embodiment of the present invention will be described in detail with reference to fig. 23 to 25. Since the first and second locking

bar mounting grooves

241 and 242 have the same structure, only the first locking bar mounting groove 241 will be described as an example. As shown in fig. 23 to 25, the first locking bar mounting groove 241 includes a first straight wall 247 and a second straight wall 248, and a height H3 of the first straight wall 247 is greater than a height H4 of the second straight wall 248 to have a height difference between the first straight wall 247 and the second straight wall 248, thereby forming a locking bar mounting space 255 between a top of the first straight wall 247 and a top of the second straight wall 148, that is, a locking bar mounting space 255 between the cross beam 222 and the second straight wall 248, and a locking bar 260, which is sleeved with a torsion spring 270 to be described in detail later, can be mounted to the first locking bar mounting groove 241 and the second locking bar mounting groove 242 through the locking bar mounting space 255. The first straight wall 247 is connected to the first connector 220 by welding, and the distance between the first straight wall 247 and the second straight wall 248 is greater than the diameter of the locking bar 260, so that the locking bar 260 is received in the locking bar installation groove. The first screw 251 is connected to the first locking bar installation groove 241 through the first through hole 243 to form a closed cavity 245, and the closed cavity 245 may receive the locking bar 260.

A reinforcing rib 249 is arranged on the connecting plate 246, and a hook head installation groove 253 is formed between the reinforcing rib 249 and the first upright 221 of the first connecting member 220. When the lock lever 260 is installed, the hook head 261 moves from the hook head installation groove 253 into the lock lever installation groove. The connecting plate 246 and the reinforcing rib 249 may be provided with slopes or curved surfaces to prevent the connecting plate 246 or the reinforcing rib 249 from interfering with the torsion spring 270 during the installation of the locking lever 260.

As shown in fig. 27 and 28, the torsion spring 270 includes a first end 271 and a second end 272 opposite the first end 271 of the torsion spring 270. A first end 271 of the torsion spring 270 is fixedly attached to the lock lever 260 and a second end 272 of the torsion spring 270 abuts against the lock base 240 to enable the handle 262 to abut against the case. As shown in fig. 26, the lock lever 260 is provided with a torsion spring fixing hole 263, and the first end 271 of the torsion spring 270 can be directly fixed on the torsion spring fixing hole 263, or as shown in fig. 21, the first end 271 of the torsion spring 270 is fixedly connected with the torsion spring fixing hole 263 through an elastic cylindrical pin 264 of the lock 210. When the lock lever 260 moves to the locked state, the elastic cylindrical pin 264 compresses the torsion spring 270, and when the lock 210 rotates from the locked state to the unlocked state, the elastic cylindrical pin 264 drives the torsion spring 270 to twist. When the handle 262 is released, the torsion spring 270 keeps the handle 262 in close proximity to the first link 220.

When the pallet box 200 is produced, the top surface of the lock base 240 is welded to the bottom surface of the beam 222 of the first connecting member 220, the side surface of the lock base 240 is welded to the side surface of the first upright 221 of the first connecting member 220, the lock base 240 and the first connecting member 220 are subjected to hot dip galvanizing treatment, and then the lock lever 260 and the closing member 250 subjected to electroplating surface treatment or hot dip galvanizing surface treatment are installed. A torsion spring 270 is sleeved onto the lock lever 260 along one end of the handle 262. When the lock lever 260 is installed, the hook head 261 faces upward and faces the hook head installation groove 253, the torsion spring 270 faces the torsion spring installation space 254 between the first lock lever installation groove 241 and the second lock lever installation groove 242, then the lock lever 260 is installed into the first lock lever installation groove 241 and the second lock lever installation groove 242 from the lock lever installation space 255 between the second straight wall 248 of the first lock lever installation groove 241 and the second lock lever installation groove 242 and the cross beam 222, the lock lever 260 is pushed to insert the hook head 261 into the first long through hole 223 of the first upright column 221, and then the handle 262 leans against the first connecting member 220. Then, the first screw 251 and the second screw 252 are respectively installed in the first through hole 243 and the second through hole 244, the elastic cylindrical pin 264 is installed in the torsion spring fixing hole 263 of the lock rod 260, the second end 272 of the torsion spring 270 is abutted against the outside of the box of the connecting plate 246, the first end 271 of the torsion spring 270 is fixed on the elastic cylindrical pin 264, and the installation of the lock 210 is completed.

When the lock 210 is disassembled, the first end 271 of the torsion spring 270 is detached from the elastic cylindrical pin 264, then the elastic cylindrical pin 264 is detached from the torsion spring fixing hole 263 of the lock lever 260, and the first screw 251 and the second screw 252 are detached from the first through hole 243 and the second through hole 244, respectively. When the lock lever 260 is removed, the lock lever 260 is rotated to a position where the hook head 261 can be separated from the first long through hole 223 of the first column 221, and then the lock lever 260 is moved in a direction away from the first lock lever installation groove 241 so that the hook head 261 retreats into the lock lever installation groove, and when the hook head 261 faces the hook head installation groove 253, the lock lever 260 is further removed from the lock lever installation space 255 between the two second straight walls 248 of the first lock lever installation groove 241 and the second lock lever installation groove 242 and the cross beam 222. The torsion spring 270 is then removed along one end of the handle 262 to complete the removal of the locking lever 260 and torsion spring 270.

If the locking lever installation space 255 is large enough, it is also possible to install the torsion spring 270 and the elastic cylindrical pin 264 on the locking lever 260 before installing the locking lever 260 on the lock holder 240 and to remove the elastic cylindrical pin 264 after removing the locking lever 260 from the lock holder 240, which is more convenient.

As shown in fig. 28, when the lock 210 is in the unlocked state, the hook 261 of the lock lever 260 is located inside the first upright 221 of the first link 220, and the lock lever 260 does not spontaneously extend out of the outer side of the first upright 221 to affect the folding of the tray box 200 because the first long through hole 223 blocks the pressure limiting action of the hook 261 and the torsion spring 270. The elastic cylindrical pin 264 of the lock lever 260 abuts against the inner end surface of the first lock lever mounting groove 241 close to the handle 262, and plays a role in limiting the lock lever 260 to move in a direction away from the first upright post 221. Thus, the torsion spring 270 and the elastic cylindrical pin 264 can prevent the lock lever 260 from being disengaged from the lock housing 240 on the one hand, and confine the hook head 261 inside the first upright 221 on the other hand, so that the handle 262 can abut against the first link 220 under the torsion force of the torsion spring 270. If the hook head 261 moves to the first long through hole 223 on both side surfaces of the first upright post 221 or moves out of the first upright post 221 and is located at the second locking bar installation groove 242, the hook head 261 is blocked by the first long through hole 223 or the second locking bar installation groove 242, and the handle 262 cannot rotate, so that the handle cannot abut against the first link 220. The locking lever 260 is limited by the torsion force of the torsion spring 270, so that the handle 262 of the locking lever 260 always leans against the first connecting member 220 and cannot rotate spontaneously to exceed the outer side of the first connecting member 220, i.e., cannot rotate spontaneously to exceed the outer side of the box body. Preferably, the torsion spring 270 is suitably configured to provide a pre-tensioning torsion force to urge the handle 262 better against the first connector 220.

As shown in fig. 32, the first connector 220 includes a shroud 224, and the shroud 224 is installed after the latch 210 is installed. When the lock 210 is in the non-operating state, the end of the elastic cylindrical pin 264 close to the box body can be extended properly to abut against the lower end of the connecting plate 246 of the lock base 240, so that the handle 262 will not rotate toward the box body due to the pre-tightening torsion of the torsion spring 270, so as to facilitate the installation of the shroud 224 of the first connecting member 220. The pre-tensioned torsion of the torsion spring 270 must overcome the torsion created by the weight of the handle 262 during the opening of the half-folded door and during the installation of the shroud plate 224, thereby securing the handle 262 in place.

As shown in fig. 28-31, when locking the lock 210, the operator operates the handle 262 to lift the handle 262 away from the first connecting member 220 against the torsion force of the torsion spring 270, so that the hook head 261 rotates to a position where it can move out of the first long through hole 223 of the first upright 221, and pushes the handle 262 against the pressure of the torsion spring 270 so that the hook head 261 extends out of the first long through hole 223 of the first upright 221, and thus extends into the second long through hole 232 of the second upright 231 of the second connecting member 230. Then, the handle 262 is pressed against the first link 220, so that the hook head 261 of the lock lever 260 hooks the edge of the second long through hole 232 of the second post 231. Meanwhile, the handle 262 is stopped and limited by the outer end surface of the first locking bar installation groove 241 of the seat 240, so that the locking bar 260 cannot move in the direction of the hook head 261 any more. Thereby accomplishing the latch 210 to connect the first connector 220 and the second connector 230.

The procedure for unlocking the lock is shown in fig. 31-28, wherein the procedure for unlocking is opposite to the procedure for locking, and the operator operates the handle 262 to lift the handle 262 away from the first upright post 220 against the torsion force of the torsion spring 270, so that the hook head 261 rotates to a position where it can move out of the second long through hole 232 of the second upright post 231, and under the pressure of the torsion spring 270, the hook head 261 of the lock lever 260 spontaneously moves out of the second long through hole 232 of the second upright post 231 of the second connecting member 230, and then moves into the interior of the first upright post 221 on the first connecting member 220, and then releases the handle 262, and under the torsion force of the torsion spring 270, the handle 262 spontaneously leans against the first connecting member 220, thereby completing the unlocking of the lock 210.

The lock of the embodiment solves the problem that the lock is welded behind the tray box after hot dip galvanizing treatment, also solves the problem that the tray box is damaged due to the fact that the lock is not operated according to the standard, and meanwhile, the lock rod and the torsion spring are replaceable, so that the problem that the lock rod or the torsion spring of the existing hook lock is easy to damage but cannot be replaced is solved.

The present invention also provides a tray box 200, wherein the tray box 200 is composed of a bottom plate 280, two end walls 220 ', two side walls 230' and two top covers 290. The end wall 220 'may be the first connector 220, and the side wall 230' may be the second connector 230. The two end walls 220 'and the two side walls 230' are hinged around the chassis 280, respectively, and can be folded onto the chassis 280.

When the tray box 220 is erected, the two side walls 230 'are erected first, and then the two end walls 220' are erected. As shown in fig. 33 and 34, the end wall 220 ' and the side wall 230 ' are connected together by the lock 210 disposed on the end wall 220 ', one lock 210 is disposed on each side of each end wall 220 ', and the two locks 210 are symmetrical along the central axis of the end wall 220 '. The end wall 220 'includes a first vertical column 221' and a cross beam 222 ', the first vertical column 221' is provided with a first through hole 223 ', the top of the lock 210 is welded to the bottom of the cross beam 222', and the side of the locking bar installation groove of the lock 210 is close to the inner side of the first vertical column 221 'and the position of the first through hole 223'. The sidewall 230 ' includes a second pillar 231 ' and a second through hole 232 ' is provided at a position corresponding to the first through hole 223 ' of the first pillar 221 '. When locking lock 210, the hook head of lock lever 260 extends from first through-slot 223 'of first upright 221', extends into second through-slot 232 'of second upright 231' of side wall 230 ', hooks the edge of second through-slot 232', and connects end wall 220 'and side wall 230'.

It is obvious that the lock of the invention can also be provided on the end wall with the half-folding door for connecting the half-folding door with the frame of the side wall or end wall, which will not be described in detail herein.

The present invention further provides a tray box 300, as shown in fig. 35 and 36, two top covers 390 are respectively hinged to the upper ends of two opposite side walls 330, after the tray box 300 is loaded with goods, the long side beams 391 of the two top covers 390 can be sequentially fastened together in an up-down manner, and the upper top cover 390 is locked with the two end walls 320 by locks 310 respectively disposed on the two end walls 320. A half-folding door 392 is arranged on one of the end walls 320, the half-folding door 392 comprises a cross beam 322 and a vertical column 321, a first long through hole is arranged on the cross beam 322, the top of the lock 310 is connected with the bottom of the cross beam 322, and the connecting plate 346 of the lock 310 is connected with the vertical column 321. The short side beam 393 of the upper top cover 390 is provided with a second long through hole at a position corresponding to the first long through hole of the cross beam 322, and the second long through hole is positioned at the lower side surface of the short side beam 393. When locking the lock 310, the hook of the locking lever 360 protrudes from the first through-hole of the cross member 322, and protrudes into the second through-hole of the short side beam 393 of the upper top cover 390 to hook the edge of the second through-hole, so as to lock the upper top cover 390 and the end wall 320 where the half-folding door 392 is provided, and the lower top cover 390 is also locked because the long side beam 391 of the upper top cover 390 presses the long side beam of the lower top cover 390. Similarly, a latch 310 is provided on the other end wall 320, which does not have a half-folding door, to latch the top cover 390 and the end wall 320 together.

Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Terms such as "disposed" and the like, as used herein, may refer to one element being directly attached to another element or one element being attached to another element through intervening elements. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is otherwise inapplicable or otherwise stated in the other embodiment.

The present invention has been described in terms of the above embodiments, but it should be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the scope of the described embodiments. It will be appreciated by those skilled in the art that many variations and modifications may be made to the teachings of the invention, which fall within the scope of the invention as claimed.

Claims

1. A lock for a pallet box, the pallet box including a first connector and a second connector, the lock comprising:

the lock seat is used for being fixedly connected to the first connecting piece, and a lock rod mounting part is arranged on the lock seat; and

the first end of the lock rod is provided with a hook head for locking the first connecting piece and the second connecting piece, and the lock rod is detachably arranged in the lock rod mounting part;

locking lever installation department is the mounting groove, the locking lever can be installed in the mounting groove, the mounting groove is for having open-ended U type groove, the tool to lock still includes closed piece, works as the locking lever install extremely during U type groove, closed piece is located the locking lever with between the opening, wherein

The lock holder is surface-treated together with the tray box after being fixedly connected to the first connecting member, and then the lock lever, which is surface-treated separately, is assembled to the lock holder.

2. The lock according to claim 1, wherein said U-shaped groove comprises a first straight wall and a second straight wall, said first straight wall having a length equal to a length of said second straight wall.

3. The lock according to claim 1, wherein said U-shaped groove comprises a first straight wall and a second straight wall, said first straight wall having a length greater than a length of said second straight wall.

4. The lock according to claim 1, wherein the locking bar mounting portion is provided with a first through hole, and the closing member is a screw or a pin detachably passed through the first through hole.

5. The lock according to claim 3, further comprising an axially compressible torsion spring having a first end connected to said locking bar and a second end opposite said first end connected to said lock housing.

6. The lock according to claim 5, wherein the locking rod mounting portion comprises two mounting grooves, a torsion spring mounting space is formed between the two mounting grooves, the torsion spring is arranged in the torsion spring mounting space, and the lock seat further comprises a connecting plate for connecting the two mounting grooves.

7. The lock according to claim 6, wherein said lock base further comprises a reinforcing rib provided on said connecting plate for reinforcing the strength of said connecting plate.

8. The lock according to claim 7, wherein a hook mounting portion is formed between at least one side of the rib and the first connector.

9. The lock according to claim 5, wherein the locking bar is provided with a torsion spring fixing hole, and the first end of the torsion spring is fixedly connected to the torsion spring fixing hole.

10. The lock of claim 9, further comprising a resilient pin, wherein the first end of the torsion spring is fixedly coupled to the torsion spring mounting hole via the resilient pin.

11. The lock according to claim 1, wherein a second end of the locking bar opposite to the first end is provided with a handle having a bend.

12. The lock according to claim 11, wherein the locking bar mounting portion is chamfered at least at a bottom portion of an end thereof adjacent to the handle.

13. A pallet box, characterized in that it comprises a lock according to any one of claims 1-12.