Latch

Abstract

To prevent metal powder generation between latch parts of a latch such as a hasp.SOLUTION: A latch H is configured to include a pair of latch parts P1, P2, one of which is formed from a metal material such as stainless steel and is entirely resin-coated, and the other of which is formed from a synthetic resin material, and a support shaft S is formed from a metal material and is entirely resin-coated or entirely formed from a synthetic resin material.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a hasp, generally referred to as such, which can be used for various purposes such as locking out (locking) the push buttons of various machines so that they cannot be operated for safety reasons, replacing or locking various doors and lids with padlocks or together with padlocks.

Background Art

[0002] Generally, this type of hasp is composed of a pair of hasp parts made of a metal material such as stainless steel or aluminum, which have a curved hook at one end and a lock plate with a flat plate shape and a plurality of lock holes at the other end, and are connected through a support shaft in the middle. From such a configuration, by superposing the lock plates so that the respective lock holes communicate with each other, the hooks are superposed in a substantially circular shape to close the space between the tips of the hooks. Conversely, by rotating the lock plates in a direction away from each other, the hooks are separated from each other to open the space between the tips of the hooks, taking an open state. In this way, by passing the open hooks of the hasp through the locking points such as the push buttons of various machines, closing the hooks, and engaging a padlock between some or all of the lock holes between the lock plates from this closed state to lock it, this closed state is locked.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Incidentally, since each of these hasp parts is made of metal, when using them, if a pair of hasp parts is rotated via a support shaft, the opposing surfaces of the respective hasp parts come into sliding contact with each other, and the opposing surfaces may be scraped off to generate metal powder. Recently, for example, in semiconductor and secondary battery manufacturing factories, metal powder generated from equipment in production facilities has been regarded as a problem, and improvements have been made to prevent movable parts from generating metal powder. Therefore, even in this hasp, depending on its use, it is necessary to prevent the generation of metal powder during use, and it is required to be able to cope with this.

[0005] The present invention solves such conventional problems, and an object thereof is to prevent the generation of metal powder between each of these hasp parts in this type of hasp.

Means for Solving the Problems

[0006] In order to achieve the above object, the present invention (1) A pair of hasp parts having a curved hook at one end and a lock plate having a plate shape and a plurality of lock holes at the other end are connected via a support shaft in the middle, and by opposing and polymerizing the respective lock plates so that the respective lock holes communicate with each other, the respective hooks are polymerized in a substantially circular shape to close the space between the tips of the respective hooks, and conversely, by rotating the respective lock plates in a separating direction from each other, the respective hooks are separated from each other to open the space between the tips of the respective hooks, and in the closed state, a padlock is engaged between some or all of the lock holes between the respective lock plates to lock the closed state. The hasp is of a type, One of the pair of hasp parts is formed of a metal material including stainless steel and is entirely resin-coated, and the other is formed of a synthetic resin material. The support shaft is formed of a metal material and is entirely resin-coated, or is entirely formed of a synthetic resin material. This is the gist.

[0007] In order to achieve the above object, the present invention (2) is A pair of hanging parts having a locking plate with a curved hook at one end and a plate shape with a plurality of locking holes at the other end are connected via a support shaft in the middle, and by opposing and superposing the respective locking plates so that the respective locking holes communicate with each other, the hooks are superposed in a substantially circular shape to close the space between the tips of the hooks, and conversely, by rotating the respective locking plates in a separating direction from each other, the hooks are separated from each other to open the space between the tips of the hooks, and a hanging part of a type in which a padlock is engaged between some or all of the locking holes between the respective locking plates in the closed state to lock the closed state, Each of the pair of hanging parts is formed of a metal material including stainless steel and is entirely resin-coated, The support shaft is formed of a metal material, entirely resin-coated, or entirely formed of a synthetic resin material, which is the gist.

[0008] These hanging parts preferably also have the following configuration. (1) A spacer that forms a space between the respective hanging parts so that at least both of them cannot come into contact is projected on one or both of the pair of hanging parts. In this case, spacers are provided on both of the pair of hanging parts, and the respective spacers are formed on the tip side or the base end side of each hook of each hanging part so as to be able to abut in the closed state of each hook to form stoppers. (2) One or both of the pair of hanging parts are colored in a red system.

Effects of the Invention

[0009] According to the hanging part of the present invention, due to the above configuration, it has a remarkable effect unique to the present invention that generation of metal powder can be prevented between the respective hanging parts.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Embodiment for Carrying Out the Invention

[0011] Next, embodiments for carrying out this invention will be described with reference to the drawings. Figures 1 and 2 show the overall configuration of this bet.

[0012] As shown in Figure 1, the bet H has a pair of bet parts P1, P2 which have a curved hook F at one end and a lock plate L having a plate shape with a plurality of lock holes Lо at the other end, and are connected via a support shaft S in the middle.

[0013] In this way, as shown in Figure 2(a), by overlapping each lock plate L with each other's lock holes Lо communicatively opposed, each hook F is overlapped in a substantially circular shape to close the space between the tips of each hook F. Conversely, as shown in Figure 2(b), by rotating each lock plate L in a separating direction from each other, each hook F is separated from each other to open the space between the tips of each hook F, and in the closed state, a padlock (see Figure 4) is engaged between some or all of the lock holes Lо between each lock plate L to lock the closed state.

[0014] As shown in Fig. 1, in this latch H, in particular, one of the pair of latch parts P1 and P2 is formed of a metal material including stainless steel and is entirely resin-coated, the other is formed of a synthetic resin material, the support shaft S is formed of a metal material and is entirely resin-coated or entirely formed of a synthetic resin material. Also, in addition, a spacer T that forms a space between the respective latch parts P1 and P2 so that at least both of them cannot come into contact with each other is protrusively provided on one or both of the pair of latch parts P1 and P2. And one or both of the pair of latch parts P1 and P2 are colored in a red color system.

[0015] In this case, one latch part P1 is integrally formed relatively thinly entirely of stainless steel, and includes a support shaft insertion part C in the middle (between one end and the other end), a hook F at one end, and a lock plate L at the other end. In the case of this latch part P1, the support shaft insertion part C is formed in a quadrangular flat plate shape, and a support shaft insertion hole Cо is drilled at approximately the center thereof. Note that a circular and shallow recess C1 is provided around the support shaft insertion hole Cо on the outer surface side of one latch part P1. The hook F extends in an arc shape from one side of one end edge of the support shaft insertion part C toward the other side of the one side. The lock plate L extends from the other end edge of the support shaft insertion part C in a rectangular flat plate shape that is slightly wider, and a plurality of lock holes Lо, here three in each of two rows, are circularly drilled through both sides of the flat plate shape.

[0016] Also, in this case, spacers T that form a space between the respective latch parts P1 and P2 so that at least both of them cannot come into contact with each other are provided on both of the pair of latch parts P1 and P2, and on one latch part P1, the spacer T is protrusively formed between the base end of the hook F and one side of one end edge of the support shaft insertion part C.

[0017] Thus, one latch part P1 is formed, entirely resin-coated, and colored in a red color system such as pink.

[0018] In this case, the other hanger part P2 is integrally formed of a synthetic resin material having rigidity such as ABS resin, thinner than the one hanger part P1 as a whole, and includes a support shaft insertion part C in the middle (between one end and the other end), a hook F at one end, and a lock plate L at the other end. In the case of this hanger part P2, the support shaft insertion part C, the hook F, and the lock plate L are each formed in the same shape as the corresponding parts of the one hanger part P1. Since the support shaft insertion part C, the hook F, and the lock plate L of these hanger parts P2 are substantially the same as the corresponding parts of the one hanger part P1, the same reference numerals as the corresponding parts of the one hanger part P1 are assigned to each of them. Note that, unlike the one hanger part P1, a convex part C2 that protrudes slightly in a circular shape is provided around the support shaft insertion hole Co on the outer surface side of the other hanger part P2.

[0019] Also, in this case, a spacer T is formed to protrude between the base end part of the hook F and one side of one end edge part of the support shaft insertion part C in the other hanger part P2 as well. Thus, the spacers T of the pair of hanger parts P1 and P2 are provided so as to be able to abut against each other in the closed state of each hook F, and each spacer T serves as a stopper.

[0020] Thus, the other hanger part P2 is formed of a synthetic resin material having rigidity and is entirely colored in a red system color such as pink.

[0021] In this case, the support shaft S is integrally formed of a synthetic resin material as a whole, and includes a shaft part SS that is inserted into the support shaft insertion holes Co of the pair of hanger parts P1, and flange parts SF that are pressed against the outer surfaces of the support shaft insertion parts C of the hanger parts P1 and P2 at both ends of the shaft part SS.

[0022] Also, in this case, the support shaft S includes a female support shaft S0 inserted through each support shaft insertion hole Cо of one of the latch parts P1 and a male support shaft S1 inserted through each support shaft insertion hole Cо of the other latch part P2. The female support shaft S0 has a cylindrical shaft portion SS1 with an opening at its tip having substantially the same diameter as or slightly smaller than these support shaft insertion holes Cо so as to be insertable between the latch parts P1 and P2, and a circular flat flange portion SF1 that can be fitted into a circular concave portion C1 around the support shaft insertion hole Cо and is larger than the diameter of the support shaft insertion hole Cо of one of the latch parts P1. The male support shaft S1 has a cylindrical shaft portion SS2 that can be inserted between the latch parts P1 and P2 and can be fitted into the shaft portion SS1 of the female support shaft S0, and a circular flat flange portion SF2 that can abut against a circular convex portion C2 around the support shaft insertion hole Cо and is larger than the diameter of the support shaft insertion hole Cо of the other latch part P2. The female and male support shafts S0 and S1 are fitted and connected with each other's shaft portions SS1 and SS2. In this way, the shaft portion SS is constituted by the shaft portion SS1 of the female support shaft S0 and the shaft portion SS2 of the male support shaft S1, and the flange portion SF is constituted by the flange portion SF1 of the female support shaft S0 and the flange portion SF2 of the male support shaft S1.

[0023] In this way, a pair of latch parts P1, P2 and the support shaft S are formed. The latch parts P1, P2 are overlapped with the tips of the respective hooks F facing each other, and the support shaft S is inserted and fixed into the support shaft insertion holes Cо of the mutual support shaft insertion portions C. In this case, the female support shaft S0 is passed through the support shaft insertion hole Cо of one of the latch parts P1, and the male support shaft S1 is passed through the support shaft insertion hole Cо of the other latch part P2, and both support shafts S0, S1 are connected, and the latch parts P1, P2 are rotatably coupled to each other.

[0024] In this way, as shown in Fig. 2(a), the latch H is formed by superposing the lock plates L of each latch part P1, P2 such that the respective lock holes Lo communicate with each other. In this state, the hooks F are superposed in a substantially circular shape to close the space between the tips of the hooks F. Conversely, as shown in Fig. 2(b), by rotating the lock plates L away from each other, the hooks F are separated from each other to open the space between the tips of the hooks F, thereby assuming an open state. In the closed state, a padlock is engaged between some or all of the lock holes Lo between the lock plates L to lock the closed state.

[0025] Examples of the use of the latch H are illustrated in Figs. 3 and 4. This example shows a case where a plurality of administrators lock out (lock) the push button B of various machines for safety reasons. As shown in Fig. 3, two openings are provided on the circumferential surface of the push button B, and these openings B0 communicate with each other. A latch engagement hole B1 is formed between these openings B0 such that the hook F of the latch H can be inserted therethrough.

[0026] First, as shown in Fig. 4(1), one hook F of the latch H is hooked onto the latch engagement hole B1 of the push button B. In this case, by rotating the lock plates L of each latch part P1, P2 away from each other, the hooks F are separated from each other to open the space between the tips of the hooks F, thereby assuming an open state. Then, one hook F is inserted through one opening B0 of the push button B and then through the other opening B0, and this hook F is hooked onto the latch engagement hole B1 of the push button B.

[0027] Subsequently, as shown in Fig. 4(2), the other hook F of the latch H is hooked onto the latch engagement hole B1 of the push button B. In this case, the other hook F is inserted through the other opening B0 of the push button B, and the lock plates L of the respective latch parts P1 and P2 are superposed with their respective lock holes Lо facing each other so as to be communicable, thereby superposing the hooks F in a substantially circular shape and closing the space between the tips of the hooks F to a closed state, and then both hooks F are hooked onto the latch engagement hole B1 of the push button B. At this time, due to the abutment of the spacers T of the hooks F, the space between the tips of the hooks F is completely closed, and the lock plates Lо are completely superposed. During this operation, even if the pair of latch parts P1 and P2 are rotated via the support shaft S and the opposing surfaces of the pair of latch parts P1 and P2 are in sliding contact, since one of the metal-made parts of the latch parts P1 and P2 is entirely resin-coated and the other is formed of a synthetic resin material, the opposing surfaces of the latch parts P1 and P2 are not worn and no metal powder is generated. Also, since the entire support shaft S is formed of a synthetic resin material, even if the latch parts P1 and P2 are rotated around this support shaft S, the sliding contact portions thereof are not worn and no metal powder is generated. After hooking the latch H onto the push button B in this way, confirm that the latch H does not come off.

[0028] Then, as shown in Figs. 4(3) and (4), the push button B is locked out (locked) by a plurality of administrators so that it cannot be operated for safety reasons. In this case, first, as shown in Fig. 4(3), from the closed state of the hooks F, the first padlock N is engaged between one of the lock holes Lо between the lock plates L to lock the closed state of the hooks F, and the first lockout is performed. Subsequently, as shown in Fig. 4(4), from the closed state of the hooks F, the subsequent padlocks N are engaged between the remaining lock holes Lо between the lock plates L to lock this closed state, and the subsequent lockouts are performed.

[0029] In this way, the push button B is locked by a plurality of padlocks N via the latch H and locked out by a plurality of administrators. And since both of the pair of latch parts P1, P2 are colored red, the latch H is made conspicuous, and the locked-out state of the push button B by the latch H becomes easy to visually recognize, and it is possible to surely call the attention of the operator and administrator of this push button B.

[0030] As described above, according to this latch H, one of the pair of latch parts P1, P2 is formed of a metal material including stainless steel and is entirely resin-coated, the other is formed of a synthetic resin material, and the support shaft S is entirely formed of a synthetic resin material. Therefore, in its use, when the pair of latch parts P1, P2 are rotated via the support shaft S and the opposing surfaces of the respective latch parts P1, P2 are in sliding contact with each other, the opposing surfaces are not worn away to generate metal powder, and generation of metal powder between the respective latch parts P1, P2 can be surely prevented. Further, since the support shaft S is entirely formed of a synthetic resin material, even when the respective latch parts P1, P2 are rotated about the support shaft S, the sliding contact portions with each other are not worn away to generate metal powder, and generation of metal powder between the respective latch parts P1, P2 and the support shaft S can be surely prevented.

[0031] This latch H further has the following advantages. (1) On both of the pair of latch parts P1, P2, a spacer T that forms a space between the respective latch parts P1, P2 so that at least both of them cannot come into contact with each other is provided protruding. In this case, since the spacer T is provided on both of the pair of latch parts P1, P2 and each spacer T is formed so as to be able to abut against the base end side of each hook F of each latch part P1, P2 in a closed state of each hook F to form a stopper, play between the respective latch parts P1, P2 is eliminated, and the closed state of each hook F can be easily and surely taken. (2) Since both or one of the pair of latch parts P1 and P2 is colored in the red system, the red latch H can be made conspicuous, and when the push button B of various machines is locked out (locked out) so that it cannot be operated for safety reasons, the red visual lockout of the push button B can be used to draw attention.

[0032] In this embodiment, the support shaft S is entirely formed of a synthetic resin material, but it may be formed of a metal material such as stainless steel. In this case, the whole is resin-coated. Even in this way, the same operational effects as those of the above embodiment can be achieved.

[0033] In this embodiment, spacers T that form a space between the latch parts P1 and P2 so that at least both of them cannot come into contact with each other are provided protruding on both of the pair of latch parts P1 and P2. However, the spacers may be provided protruding only on one of the pair of latch parts so as to form a space between the latch parts so that at least both of them cannot come into contact with each other. In this case, although the function as a stopper is lost, even in this way, the contact of each latch part can be prevented and the generation of metal powder can be surely prevented.

[0034] In this embodiment, each spacer T is formed on the base end side of each hook F of each latch part P1 and P2 so as to be able to abut in the closed state of each hook F to form a stopper. However, each spacer may be formed on the tip side of each hook of each latch part so as to be able to abut in the closed state of each hook to form a stopper. Even in this way, the same operational effects as those of the above embodiment can be achieved.

[0035] In this embodiment, both of the pair of latch parts P1 and P2 are colored in the red system, but one of the pair of latch parts may be colored in the red system. Even in this way, substantially the same operational effects as those of the above embodiment can be achieved.

[0036] In addition, in this embodiment, one of the pair of latch parts P1 and P2 is formed of a metal material including stainless steel and is entirely resin-coated, and the other is formed of a synthetic resin material. The support shaft S is entirely formed of a synthetic resin material. However, each of the pair of latch parts may be formed of a metal material including stainless steel and entirely resin-coated, and the support shaft may be formed of a metal material and entirely resin-coated or entirely formed of a synthetic resin material. Even in this case, the same operational effects as those of the above-described embodiment can be achieved. In this case, a spacer that forms a space between the latch parts so that at least both of them cannot come into contact with each other may be provided protruding from one or both of the pair of latch parts. Even in this case, the same operational effects as those of the above-described embodiment can be achieved. In this case, spacers may be provided on both of the pair of latch parts, and each spacer may be formed on the tip side or the base end side of each hook of each latch part so as to be able to abut in a closed state of each hook to form a stopper. Even in this case, the same operational effects as those of the above-described embodiment can be achieved. Furthermore, in this case, both or one of the pair of latch parts may be colored in a red color system. Even in this case, the same operational effects as those of the above-described embodiment can be achieved.

Explanation of Reference Numerals

[0037] H Latch P1, P2 Latch Parts F Hook L Lock Plate Lо Lock Hole T Spacer C Support Shaft Insertion Port Cо Support Shaft Insertion Hole S Support Shaft S0 Female-Side Support Shaft S1 Male-Side Support Shaft SS Shaft Portion SS1, SS2 Shaft Portions SF flange part SF1, SF2 flange parts B push button B0 opening B1 latch engagement hole N Nanjing lock

Claims

1. A pair of latch parts each having a locking plate with a curved hook at one end and a plurality of locking holes in a plate shape at the other end, are connected via a support shaft in the middle, and by opposing and overlapping the respective locking plates so that the respective locking holes communicate with each other, the hooks are overlapped in a substantially circular shape to close the space between the tips of the hooks, and conversely, by rotating the respective locking plates in a separating direction from each other, the hooks are separated from each other to open the space between the tips of the hooks, and a padlock is engaged between some or all of the locking holes between the respective locking plates in the closed state to lock the closed state. The latch is of the type, wherein one of the pair of latch parts is formed of a metal material including stainless steel and is entirely resin-coated, and the other is formed of a synthetic resin material, and the support shaft is formed of a metal material and is entirely resin-coated or entirely formed of a synthetic resin material, characterized by the above latch.

2. A pair of latch parts each having a locking plate with a curved hook at one end and a plurality of locking holes in a plate shape at the other end, are connected via a support shaft in the middle, and by opposing and overlapping the respective locking plates so that the respective locking holes communicate with each other, the hooks are overlapped in a substantially circular shape to close the space between the tips of the hooks, and conversely, by rotating the respective locking plates in a separating direction from each other, the hooks are separated from each other to open the space between the tips of the hooks, and a padlock is engaged between some or all of the locking holes between the respective locking plates in the closed state to lock the closed state. The latch is of the type, wherein each of the pair of latch parts is formed of a metal material including stainless steel and is entirely resin-coated, and the support shaft is formed of a metal material and is entirely resin-coated or entirely formed of a synthetic resin material, characterized by the above latch.

3. The latch according to claim 1 or 2, wherein a spacer is provided protruding on one or both of the pair of latch parts to form a space between the respective latch parts where at least both of them cannot come into contact with each other.

4. Spacers are provided on both of the pair of latch parts, and each of the spacers is formed on the tip side or the base end side of each hook of each latch part so as to be able to abut in a closed state of each hook to form a stopper. The latch according to claim 3.

5. The latch according to claim 1 or 2, wherein both or one of the pair of latch parts is colored in a red color system.

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