JP2016019562A - Scissor, method for manufacturing the same and method for manufacturing grip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reliably attach a cover which is attached to a grip hole of scissors with a first resin grip covering a connecting part of a scissor body to the grip hole while suppressing an increase in a cost.SOLUTION: To manufacture scissors, a scissor body having a second hole 112B is prepared. Next, a main mold frame 400 and an auxiliary mold frame 300 are arranged to be adjacent to the scissor body 110 to form a grip of a resin. Then, an undercut forming part 112 is arranged in a part corresponding to a subsequent undercut part via the second hole 112B. While keeping the state, the resin is filled in the mold frame and is hardened. Then, when the main mold frame 400 and the auxiliary mold frame 300 are removed, the grip 120B with a grip engaging part 123 having the undercut part for engaging a cover engaging part of a cover is formed.SELECTED DRAWING: Figure 12

Description

  The present invention relates to a bag.

Amber has been used in various scenes since ancient times. For example, it is used in various scenes such as offices and homes. In addition, there is no time to enumerate the use of the bag for office use, cooking, sewing, barber / beauty, etc.
The scissors are generally configured by connecting two housings with a connecting member so as to be rotatable with respect to each other. Each housing has two housing bodies each having a blade portion on the distal end side having a blade along the inner side, an arm portion on the proximal end side thereof, and a connecting portion positioned between the blade portion and the arm portion. And a handle attached to the arm portions of the two casing main bodies. The connection of the two casings by the above-described connecting member is performed so that the two casings can rotate with respect to each other about the connecting member. The user puts fingers into the handles of the two casings, and rotates the angle of the two casings so that the angle changes from a large state to a small state. An object that is an object to be cut between the blades can be cut.

By the way, some ridges have their handles made of resin. Such a handle is usually provided for a portion corresponding to the arm portion of the housing body, which is generally made of metal, but in some cases, the handle may cover the connecting portion.
In a bag having such a handle, at least one of two handles provided in each of the two casings (a handle having a handle hole described later is referred to as a “first handle” in the present application. It is usual to have a handle hole that is a hole extending to the front side surface of the connecting portion in the housing body at a position penetrated by the connecting member in the portion covering the connecting portion. In the process of manufacturing a bag having a first resin handle that covers not only the arm part but also the connecting part, two casings having a resin handle are first manufactured, and then the casings are connected with a connecting member. Although it is connected by crimping or the like to form a rod, the handle hole as described above is necessary in order to perform the operation of coupling the frame with the coupling member.

On the other hand, the handle hole is not required after the work of caulking the housing with the connecting member.
Therefore, in a bag having a handle hole, it is normal to cover the opening of the handle hole with a cover that functions as a lid after the operation of connecting the frame with the connecting member is finished.

The above-described cover attached to the handle hole is normally fixedly attached to the handle hole by welding or adhesion in order to prevent the cover from falling off. However, it is troublesome to perform welding or bonding work, and the cost is increased.
From such a point of view, a technique of simply fitting the cover into the opening of the handle hole is also used, but that alone may cause the cover to fall out of the handle hole.
On the other hand, on the back side surface of the cover, there is provided a locking part for locking, and on the inner peripheral surface of the handle hole, by providing another locking part that locks with the above locking part, There is also known a technique in which the cover is fixedly attached to the handle hole by locking the lock portion of the cover and the other lock portion of the handle hole without welding or bonding (Japanese Utility Model Publication No. 5-35063). . However, in such a technique, since the other locking portion on the cover side has an undercut that cannot be removed by a normal mold, the first handle is constituted by a plurality of members, which increases the cost. Inevitable. Various techniques have been proposed in the past, such as applying a slide core, to remove the part called undercut that cannot be removed from the formwork by simply opening and closing the formwork. When the first handle is provided on the housing, they cannot be used due to restrictions from the shape of the housing body.

  The present invention securely attaches the cover attached to the handle hole of the bag having the first resin handle that covers up to the connecting part of the frame body to the handle hole while suppressing an increase in cost. It is an object to provide a technology that can be used.

In order to solve the above-mentioned problems, the present inventor proposes the following invention.
The invention includes two housing bodies each having a blade portion on the distal end side having a blade along the inner side, an arm portion on the proximal end side thereof, and a connecting portion positioned between the blade portion and the arm portion. And the two armatures having the arm portions of the two housing main bodies and the handles covering the front side surfaces of the connecting portions, and the two housings are connected to each other at the connecting portions of the housing main bodies. And a first handle that is at least one of the handles, at a position that is caulked to the connection member of the connection part in the housing, on the front side surface of the connection part. And a handle hole in which a handle locking portion having an undercut portion that is a gap is formed between the outer peripheral surface of the connecting portion and extending from the inner peripheral surface thereof toward the center thereof, and In the handle hole, the handle A front surface side of the coupling portion of the handle locking portion extending to a lid portion having a shape corresponding to the cross-sectional shape of the hole and an undercut portion of the handle locking portion provided on the back side surface of the lid portion And a locking body having a cover locking portion, which is locked to the portion of the handle, and a cover for closing the outer surface of the handle hole having the cover. Hereinafter, it may be simply referred to as “manufacturing method”.
And this manufacturing method does not face the undercut part of the preparatory process which prepares the housing main body which has the undercut hole which is a hole located in the position corresponding to the outer edge vicinity of the handle hole, and the handle latching part A first mold, which is a mold covering the part, is disposed in the vicinity of the casing body, and the first handle is formed between the first mold and the handle locking portion. The undercut portion forming portion that penetrates the second mold having an undercut portion forming portion that is a member that occupies the undercut portion, from the back side surface side to the front side surface of the housing body. Filling and curing the melted resin between the mold placement process of placing in close proximity to the housing body so as to occupy the undercut portion, and between the first mold and the second mold Resin curing process; Serial by removing the first mold frame and the second mold frame has a mold removal process of the first handle piece was allowed to cure resin.
As described above, the first resin handle fixed to the housing by such a manufacturing method has a handle hole as in the case of the conventional bag having the first resin handle covering the connecting portion of the housing body. doing. Moreover, an undercut which is a gap between the inner peripheral surface of the handle hole provided in the first handle made by the manufacturing method of the present application and the outer surface of the connecting portion extending from the inner peripheral surface toward the center thereof. A handle locking portion having a portion is provided. Since there is an undercut portion that is a gap on the back side of the handle latching portion, the housing having the first handle has a lid portion that has a shape conforming to the cross-sectional shape of the handle hole, A locking body having a cover locking portion, which is locked to a portion on the front side surface of the coupling portion of the handle locking portion, extending to an undercut portion of the handle locking portion provided on the back side surface When combined with the cover, the cover locking part of the cover can be easily fixed with one action by locking it to the handle locking part of the handle hole, and it can be attached without using welding or bonding. The state is definitely fixed.
In addition, the first handle in the present application is integrated as a whole despite the presence of the undercut portion, and is manufactured by one injection molding, so that the manufacturing cost is low.
In the manufacturing method of the 1st handle of this invention, it is supposed that the 1st handle as a whole is obtained as follows.
First, in the preparation process in the manufacturing method of the present application, a housing body having an undercut hole, which is a hole located at a position corresponding to the vicinity of the outer edge of the handle hole, is prepared. There is no undercut hole penetrating the housing body in a normal housing body. The first handle is manufactured using the housing body provided with such an undercut hole at a position corresponding to the vicinity of the outer edge when the handle hole is made later (usually part of the connecting portion). It is the first device in this manufacturing method to be used when performing.
In the manufacturing method of the first handle, in the mold layout process, the first mold frame and the second mold frame that determine the shape of the first handle portion are arranged close to the housing body (note that Both the first mold frame and the second mold frame may be a single mold frame or a plurality of mold frames. The second mold frame is provided with an undercut portion forming portion having a size corresponding to the above-described undercut portion. When the second mold frame is arranged in the mold arrangement process, the undercut hole is formed. The undercut portion forming portion penetrating from the back side surface side to the front side surface of the body occupies the undercut portion. This is the second device.
In that state, the melted resin is filled in the first mold frame and the second mold frame, cured, and removed to remove the cured resin from the arm part to the connecting part of the housing body. A first handle that covers at least the surface. The space where the undercut portion was present when the undercut portion was pulled out from the undercut hole of the housing becomes the undercut portion. It is possible to pull out the undercut part forming part. That is, according to the manufacturing method of the 1st handle of this invention which has the above-mentioned 2 devices, it becomes possible to form an undercut part.
In short, the first handle manufacturing method of the present application uses a housing body having an undercut hole. In other words, the shape of the housing body is rationally determined from the functions that the housing body originally requires. By changing from the conventional shape, and using the undercut hole as a space (or a passage) for moving the undercut portion forming portion of the second mold for forming the undercut portion, An undercut portion can be formed.
Moreover, since the first handle manufacturing method of the present application forms the entire first handle including the handle hole having the handle locking portion as a single body by a single injection molding, it corresponds to the undercut portion. This is advantageous in terms of cost as compared with a case where a manufacturing method in which a handle locking portion having a gap is attached to the handle hole as a separate member, for example.

In the specification of the present application, the front side surface of the chassis main body means a surface on the side where the two chassis main bodies do not face each other in each chassis, and the back side surface of the chassis main body is the two surfaces in each chassis main body. It means the surface on the side where the housing bodies face each other.
Further, the concept of the front side surface and the back side surface of the cover lid portion is in accordance with the arrangement of the front side surface and the back side surface of the housing body having the first handle to which the cover is attached.

In the preparation process of the first handle manufacturing method of the present application, a housing body having a plurality of undercut holes may be prepared. In that case, in the mold layout process, the second mold having a plurality of undercut portion forming portions respectively corresponding to the plurality of undercut holes is displayed from the back side of the casing body. Each of the undercut portion forming portions penetrating toward the side surface side can be disposed close to the housing body so as to occupy the undercut portion.
By doing in this way, it is possible to form several handle latching | locking parts in a handle hole.
Of course, when there are a plurality of handle locking portions, the number of cover locking bodies each having a cover locking portion locked with each of the handle locking portions is the same as the number of handle locking portions. If the cover locking part and the handle locking part are fixed at a plurality of locations, the cover is stably fixed to the handle hole.
If the handle hole is circular, if the plurality of handle locking portions are arranged so as to be in a symmetrical relationship with the center of the circle as the center, the fixing of the cover to the handle hole is more stable. Become.

The first mold frame and the second mold frame cooperate to create a gap on both sides of the handle locking portion in a plane direction parallel to the front side surface of the housing body. It doesn't matter. Here, “cooperating” means that the mold that contributes to the above-described gap may be only one of the first mold and the second mold.
If there is a gap as described above, the handle locking part extending in the center direction of the handle hole from the inner peripheral surface of the handle hole, when trying to lock the cover locking part to the handle locking part, The elasticity of the resin, which is the material, makes it easier to bend toward the front side of the housing. This contributes to facilitating locking of the cover locking portion to the handle locking portion.
In order to easily cause the above-described bending, it is preferable that the handle locking portion is formed in a plate shape that is thin enough to cause the bending, but the thickness is such that the strength of the handle locking portion can be maintained. Should be.

The first mold frame and the second mold frame collaborate with the back side surface of the lid of the cover at a portion of the handle hole that is in contact with the front surface side of the housing body. The support part for supporting the cover may be formed. The significance of “collaborating” is as already described.
If such a support portion is present, the cover lid portion attached to the handle hole is stable.

  Naturally, it is possible to manufacture a bag using the box manufactured by the manufacturing method of the first handle of the present invention. The method is to manufacture a bag by combining the casing in which the first handle is manufactured by the manufacturing method of the first handle described above and another casing.

The perspective view of the bag by one Embodiment. The perspective view of the back surface side of the bag shown in FIG. The perspective view which shows the structure of the housing main body which the housing which has a big handle among the housings of the housing shown in FIG. The perspective view which shows the state in which the handle was attached to the housing main body shown in FIG. Sectional drawing of the part corresponding to the AA part in FIG. 4 of the bag shown in FIG. The perspective view which expands and shows the handle hole vicinity of the collar shown in FIG. The top view which expands and shows the handle hole vicinity of the collar shown in FIG. Sectional drawing of the part corresponding to the AA part in FIG. 4 for demonstrating the manufacturing method of the bag shown in FIG. Sectional drawing of the part corresponding to the AA part in FIG. 4 for demonstrating the manufacturing method of the bag shown in FIG. Sectional drawing of the part corresponding to the AA part in FIG. 4 for demonstrating the manufacturing method of the bag shown in FIG. Sectional drawing of the part corresponding to the AA part in FIG. 4 for demonstrating the manufacturing method of the bag shown in FIG. Sectional drawing of the part corresponding to the AA part in FIG. 4 for demonstrating the manufacturing method of the bag shown in FIG. Sectional drawing of the part corresponding to the AA part in FIG. 4 for demonstrating the manufacturing method of the bag shown in FIG.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings.
In this embodiment, a method for manufacturing a bag including the method for manufacturing the first handle of the box will be described. First, the description starts from the configuration of the bag manufactured by the method for manufacturing the bag.

FIG. 1 and FIG. 2 show an overall view of a bag made by the bag manufacturing method of this embodiment.
1 and 2 are both perspective views, and in both figures, a later-described casing of the bag is in a closed state. 1 and 2 show different surfaces of the ridge.
FIG. 3 is a perspective view of a part of the chassis main body included in each chassis, and FIG. 4 is a perspective view of a state where a handle described later is attached to one of the chassis main bodies. However, in FIGS. 3 and 4, the main body to which a large handle corresponding to the first handle among the handles described later is attached or a handle attached thereto, and a small handle is attached. The structure of the housing body is slightly different from that shown in FIGS.

  This cage has two housings 100 (for example, FIG. 1 and FIG. 2), like a normal cage. The two casings 100 can be rotated about a connecting member described later as an axis, and an object to be cut is cut in the course of the operation.

  Both housings 100 have, for example, a metal housing body 110 made of metal (for example, FIG. 3). The housing main body 110 includes a blade portion 111, a connecting portion 112, and an arm portion 113 from the distal end side. Although not limited to this, in this embodiment, the blade part 111, the connection part 112, and the arm part 113 are the board | plate materials of the same thickness except the part of the blade which the blade part 111 mentions later.

For example, a ring-shaped handle 120 is attached to the two casing main bodies 110 so that the user can grip the heel when the heel is used.
One of the handles 120 of this embodiment is small and the other is large. The user's thumb is usually passed through the smaller handle 120A. The other handle of the user is usually passed through the larger handle 120B. In this state, the user can operate the two handles 120 in the same manner as a normal scissors to rotate the two scissors 100 relative to each other, thereby cutting the object. In this embodiment, the handle 120B, which is the larger handle 120, is the first handle referred to in the present application. However, the handle 120A may be the first handle referred to in the present application, or both the handle 120A and the handle 120B may be the first handle referred to in the present application.
The two handles 120 are both made of resin, and in particular, the larger handle 120B corresponding to the first handle is a single piece. However, in this embodiment, the smaller handle 120A is also an integral object. Both the handles 120 cover not only the arm portion 113 of the housing main body 110 but also the connecting portion 112. Both of the handles 120 of this embodiment also cover both surfaces of the arm portion 113 of the casing main body 110 and the front side surface of the connecting portion 112.
Note that, for example, a rubber member having elasticity for improving the user's tactile sensation may be attached to the inside of the handle 120 configured in a ring shape. Even if such a member is added to the handle 120, in this application, if the part directly fixed to the casing main body 110 by injection molding of the handle 120 is an integral object, in this application, “(first) handle "Is a one-piece".

  A blade 111 </ b> A is provided inside the blade portion 111 of the housing main body 110. The blade 111 </ b> A is provided over the entire length of the blade portion 111. The blade 111A in the housing 100 located on the near side in FIGS. 1 and 2 is formed by reducing the thickness of the blade portion 111 from the outside (the side where the blade 111A is not attached) to the inside. Is formed.

The connecting portion 112 of the housing main body 110 connects the blade portion 111 and the arm portion 113. The connecting portion 112 is a connecting member to be described later, and is given a certain area so that the connecting portions 112 in the housing main bodies 110 of the two housings 100 can be connected to each other.
When the connecting portions 112 of the two casing main bodies 110 are caulked by the connecting member, the back side surfaces, which are planes that face each other, are in contact with each other. The two casings 100 can rotate with each other in a stable state without causing backlash by sliding the back side surfaces of the two connecting portions 112 to each other.

The connecting portion 112 is also provided with a circular first hole 112A that is penetrated later by the connecting member.
In addition, the shape and the number are not limited to the vicinity of the first hole 112A of the connecting portion 112 of the housing main body 110 to which the larger handle 120B is attached, but in this embodiment, the hole is a rectangular hole. Two second holes 112B are provided. The two second holes 112 are not limited to this, but are provided at symmetrical positions around the center of the first hole 112A. As will be described later, the second hole 112B is used when an undercut portion is formed, and corresponds to the undercut hole referred to in the present invention. As shown in FIG. 4, the insides of the two second holes 112B are not filled with the resin constituting the handle 120A even when the handle 120B is formed. In addition, the 2nd hole 112B is not provided in the vicinity of the 1st hole 112A of the connection part 112 of the housing main body 110 to which the smaller handle 120B is attached.
Further, in the vicinity of the first hole 112 </ b> A of the connecting portion 112, two third holes 112 </ b> C that are circular holes in this embodiment are provided, although the shape and number are not limited thereto. When the handle 120 is formed, the two third holes 112C are filled with the resin integrated from the handle 120. The third hole 112 </ b> C has a function of further strengthening the fixing of the handle 120 to the housing main body 110. In order to exert such a function, the third hole 112 </ b> C is provided in a portion covered with the handle 120 when the handle 120 is provided in the housing main body 110. The same applies to the smaller handle 120A that the handle 120 should be more firmly fixed to the housing body 110 by the third hole 112C. Therefore, the third hole 112C is also provided in the connecting portion 112 of the housing main body 110 to which the smaller handle 120A is attached.

The arm part 113 of the housing main body 110 is for attaching the handle 120. In order to increase the rigidity of the handle 120, the arm portion 113 enters the inside of at least a portion near the connecting portion 112 of the handle 120. The arm portion 113 of this embodiment has its tip branched into two so that each tip enters a portion near the connecting portion 112 of the ring-shaped handle 120.
In this embodiment, the sizes of the handles 120 of the two casings 100 are different as described above. Naturally, the shape of the arm portion 113 of the housing main body 110 of each housing 100 may be different depending on the shape of the handle 120.

Next, it will be described how the two casings 100 are caulked so as to be mutually rotatable by the connecting member.
FIG. 5 shows a cross-sectional view taken along the line AA in FIG.
The two casings 100 are connected to each other by, for example, caulking by the connecting member 200. The housing 100 depicted on the upper side in FIG. 5 has a large handle 120B. The housing 100 depicted on the lower side in FIG. 5 has a small handle 120A.

As described above, the housing body 110 of the upper housing 100 is provided with the second hole 112B in addition to the first hole 112A. As described above, the first hole 112A exists in the casing main body 110 of the lower casing 100, but the second hole 112B does not exist. The first hole 112A in the casing body 110 of the lower casing 100 is somewhat larger in diameter than the first hole 112A in the casing body 110 of the upper casing 100. Moreover, although the above-mentioned 3rd hole 112C exists in any housing main body 110, they do not appear in FIG.
A fixing hole 121, which is a hole coaxial with the first hole 112 </ b> A, is formed in a portion corresponding to the coupling portion 112 of the handle 120 </ b> A fixed to the lower housing 100. The fixing hole 121 extends from the front side surface of the handle 120 </ b> A to the front side surface of the connecting portion 112. The diameter of the fixing hole 121 changes in the middle thereof. In FIG. 5, the hole first portion 121A, which is a thin portion located on the upper side in FIG. 5, has a hexagonal cross section, and the hole second portion 121B, which is a thick portion located on the lower side in FIG. The cross section is circular.

A washer member 130 is fitted in the fixing hole 121 (see also FIG. 1). The washer member 130 is made of resin, for example. The washer member 130 has an outer diameter corresponding to the inner surface shape of the fixing hole 121. The washer member 130 includes a washer first portion 131 having a circular cross section whose outer diameter corresponds to the inner diameter of the first hole 112A of the housing main body 110 depicted on the lower side in FIG. A hexagonal washer second section 132 whose outer peripheral surface shape corresponds to the inner peripheral surface shape of 121A, and a circular washer third section 133 whose circular outer diameter corresponds to the inner diameter of the hole second portion 121B. ing. The washer member 130 does not rotate even if the connecting member 200 rotates about its axis because the washer second portion 132 having an outer diameter of hexagonal cross section is fitted in the hole first portion 121A.
The front side surface of the washer member 130 protrudes slightly from the front side surface of the handle 120A. The edge of the front side surface of the washer member 130 is inclined toward the front side surface of the handle 120A.
A washer hole 134 is formed in the washer member 130. The washer hole 134 has a circular washer-shaped first portion 134A having a mortar-like shape whose diameter decreases from the front surface to the back surface of the washer member 130, and the lower casing body 110. It consists of a washer hole second portion 134B having the same diameter as the first hole 112A and a circular cross section.

The connecting member 200 described above passes through the washer hole 134 and the first hole 112A that is drawn on the upper side in FIG. 5 and is formed in the casing main body 110 in the casing 100 to which the large handle 120B is attached. . The connecting member 200 has a truncated cone shape corresponding to the shape of the inner peripheral surface of the first washer hole portion 134A, and is depicted on the upper side in FIG. 5 provided at the distal end of the thick shaft portion 210 and the thick shaft portion 210. A cylindrical thin shaft portion 220 corresponding to the inner diameter of the first hole 112A formed in the casing main body 110 in the casing 100 to which the large handle 120B is attached is provided.
Although the thickness of the thin shaft portion 220 of the connecting member 200 does not change to the tip of the connecting member 200, the front surface of the housing main body 110 in the housing 100 to which the large handle 120B depicted on the upper side in FIG. The head 221 having a diameter larger than the diameter of the first hole 112 </ b> A is formed at the tip by projecting the tip from the side surface and then caulking the tip.
As a result, the two casing bodies 110 are sandwiched between the thick shaft portion 210 of the connecting member 200 and the head portion 221 of the thin shaft portion 220. As a result, the two casings 100 are connected and can rotate with respect to each other about the axis of the thin shaft portion 220 of the connecting member 200.

A handle hole 122 is provided in the larger handle 120B. The configuration in the handle hole 122 is also illustrated in the perspective view of FIG. 6 and the plan view of FIG.
The depth of the handle hole 122 extends from the front side surface of the handle 120B to the front side surface of the connecting portion 112 in the housing body 110, and is not limited to this, but has a circular cross section.
A handle locking portion 123 and a support portion 124 are provided on the inner peripheral surface of the handle hole 122. Both the handle locking portion 123 and the support portion 124 are configured integrally with the handle 120B.
The handle latching portion 123 is for latching with a cover latching portion of a cover, which will be described later, and is formed in a shape capable of that. Although not limited to this, in this embodiment, two handle locking portions 123 are provided (FIG. 7). The number of the handle locking portions 123 may be one or more, but when two or more handle locking portions 123 are present, locking of the cover locking portions described later is stabilized. When the multiple handle locking portions 123 are provided, they should be arranged in a positional relationship such that the locking of the cover locking portions by them is stable. In this embodiment, two handle locking portions 123 are positioned at both ends of the handle hole 122 having an appropriate diameter.
Although not restricted to this, the handle latching | locking part 123 in this embodiment is formed as a plate-shaped body which has a gap | interval in the both ends of the width direction. The handle locking portion 123 protrudes from the inner peripheral surface of the handle hole 122 toward the center of the handle hole 122, and is not limited thereto, but is parallel to the front side surface of the connecting portion 112. . An undercut portion 123 </ b> A that is a gap exists between the handle locking portion 123 and the front side surface of the connecting portion 112. The connection portion between the base end of the handle locking portion 123 and the inner peripheral surface of the handle hole 122 has elasticity based on the characteristics of the resin, which is a common material of them, and the handle locking portion 123 has its tip shown in FIG. 5 can be bent slightly in the vertical direction.
The support portion 124 is a stepped protrusion from the inner peripheral surface of the handle hole 122 that is in contact with the front side surface of the connecting portion 112. The support portion 124 supports the back side surface of the lid portion of the cover fitted in the handle hole 122 as will be described later by the support surface 124A that is the opening side surface of the handle hole 122. The shape of the support part 124 is formed so that it is possible. In this embodiment, the number of support portions 124 is four, but this number can be changed as a matter of course.

A cover 140 is fitted in the handle hole 122 (see also FIG. 2). The cover 140 includes a circular lid portion 141 having a size and a shape corresponding to the opening of the handle hole 122 and, for example, a bar-like locking body 142 extending vertically from the back side surface of the lid portion 141. Further, a cover locking portion 143 that bulges toward the outer side of the locking body 142 is provided.
The cover 140 is not limited to this, but is an integral body of resin. Therefore, the connecting portion between the lid portion 141 and the locking body 142 is elastic like the connecting portion between the proximal end of the handle locking portion 123 and the inner peripheral surface of the handle hole 122, and the distal end of the locking body 142. Can be bent slightly toward the center of the cover 140. When the cover 140 is attached to the opening of the handle hole 122, the cover locking portion 143 provided in the locking body 140 is locked with the handle locking portion 123 provided in the handle hole 122, and the handle 140 It has a function of strengthening the attachment of the cover 140 to the hole 122. Therefore, the number and position of the locking bodies 142 having the cover locking portions 143 correspond to the number and positions of the handle locking portions 123. The number of the locking bodies 142 in this embodiment is two, and the positions where they are attached to the lid 141 are both end positions of a certain diameter of the lid 141.
In order to attach the cover 140 to the opening of the handle hole 122, the cover 140 is pushed into the handle hole 122 in a state where the positions of the two locking bodies 142 are aligned with the positions of the two handle locking portions 123. Then, due to the presence of the elasticity described above, the tip of the handle locking portion 123 is lowered downward in FIG. 5 and the tip of the locking body 142 is moved in the center direction of the lid 141. Further, when the cover 140 is pushed into the handle hole 122, the cover locking portion 143 provided at the tip of the locking body 142 reaches the undercut portion 123 </ b> A between the handle locking portion 123 and the front surface of the connecting member 200. . If it does so, the handle latching | locking part 123 and the latching body 142 will return to an original position with the restoring force based on elasticity, As a result, the cover latching | locking part 143 and the handle latching | locking part 123 will latch. By such locking, the cover 140 does not fall out of the handle hole 122. In this state, the back side surface of the lid portion 141 of the cover 140 is in contact with the support surface 124A of the support portion 124. The thickness of the lid portion 141 of the cover 140 is designed such that the back side surface of the lid portion 141 abuts on the support surface 124A of the support portion 124. Although not limited to this, the thickness of the lid portion 141 of the cover 140 is such that the front side surface of the lid portion 141 is flush with the front side surface of the handle 120B when the cover 140 is attached to the handle hole 122. It is designed as well. Since the back side surface of the lid portion 141 is supported by the support surface 124A of the support portion 124, the attachment state of the cover 140 to the handle hole 122 becomes more stable.

Next, a method for manufacturing the above-described bag will be described.
Generally speaking, the manufacturing method of the scissors is performed in the order of manufacturing the two housings 100, connecting the two housings 100 with the connecting member 200, and closing the handle hole 122 with the cover 140.
In the process of manufacturing the two casings 100, the casing 100 having the small handle 120A and the casing 100 having the large handle 120B are manufactured separately. In any case, a well-known or publicly known process of covering the connecting portion 112 and the arm portion 113 of the housing main body 110 with a mold, filling the mold with resin, curing, and then removing the mold. By executing the above, the casing 100 having the handle 120 is manufactured. In particular, the casing 100 having a small handle 120A can be manufactured by a known or publicly known process because there is no problem in pulling the handle portion 120A from the mold.

On the other hand, in order to form the larger handle 120B in the connection part 112 and the arm part 113 of the housing main body 110, it becomes a problem how to remove the undercut part mentioned above from a formwork. This method will be described with reference to FIGS. 8 to 13 are cross-sectional views at positions corresponding to FIG.
First, the housing body 110 is prepared (FIG. 8). The housing body 110 has a first hole 112A and a second hole 112B. In addition, although the 3rd hole 112C also exists in the housing main body 110, the 3rd hole 112C does not appear in FIG.
Next, an auxiliary mold 300 (corresponding to (or at least a part of) the second mold) referred to in the present application), which is a mold, is disposed close to the back side surface of the casing body 110 (FIG. 9). The auxiliary mold 300 includes an undercut part forming part 310. The undercut portion forming unit 310 causes the undercut portion forming unit 310 to hide the second hole 112 </ b> B from the back side surface side of the case main body 110 when the auxiliary mold 300 is disposed close to the case main body 110. Then, the main body 110 is positioned on the front side surface side. At this time, the undercut part forming part 310 occupies the undercut part 123A.
Next, the auxiliary mold 300 may be placed in the proximity of the housing body 110, but the main mold 400 (corresponds to (at least a part of) the first mold) referred to in the present application). Is placed close to the back side surface of the housing body 110 (FIG. 10). Then, a space completely corresponding to the shape of the handle 120 </ b> B is formed between the main mold 400 and the auxiliary mold 300. Note that both the main mold 400 and the auxiliary mold 300 may be composed of a plurality of molds. The space formed between the main mold 400 and the auxiliary mold 300 finally creates a gap on both sides of the handle locking portion 123 in the plane direction parallel to the front side of the housing body 110. (In other words, the space corresponding to the gap is occupied by the main mold 400 or the auxiliary mold 300 or both). In addition, the space formed between the main mold 400 and the auxiliary mold 300 finally forms a support member in the portion of the handle hole 122 that is in contact with the surface side of the housing main body 110. (In other words, the space corresponding to the gap is not occupied by the main mold 400 or the auxiliary mold 300 or both).
Although the undercut part forming part 310 should be provided in the auxiliary mold 300, since there is no problem of die cutting with respect to other parts, basically, any part of the handle 120 to be finally formed is provided. Alternatively, the main mold 400 and the auxiliary mold 300 may be used.
For example, in FIG. 10, a first hole filling portion 420 is provided in the main mold 400 to prevent the first hole 112A from being filled with resin, but the first hole filling portion 320 having the same function is provided. As shown in FIG. 11, the auxiliary mold 320 may be provided. But the part 410 which makes the space which pinches | interposes the handle latching | locking part 123 between undercut part formation part 123A should be made in the main mold 400.

Next, a molten resin is filled in the space formed between the main mold 400 and the auxiliary mold 300, and the resin is cured (FIG. 12). The filling and curing of the resin may be performed using known and well-known techniques. The type of resin to be used can also follow known and well-known techniques.
Then, by removing the main mold 400 and the auxiliary mold 300, the casing 100 having the large handle 120B is completed (FIG. 13). The main mold 400 can be removed by a normal method. The auxiliary mold 300 can be removed by passing the undercut portion forming portion 310 through the second hole 112B provided in the housing main body 110.

When the two casings 100 are formed as described above, they are caulked using the connecting member 200.
Specifically, the washer member 130 is fitted into the fixing hole 121 provided in the handle 120A of the casing 100 having the small handle 120A, and the washer hole 134 of the washer member 130 and the collar having the large handle 120B. The first hole 112 </ b> A drilled in the housing main body 110 included in the body 100 is passed through the connecting member 200, and the portion protruding from the first hole 112 </ b> A of the connecting member 200 is caulked to make the above-described head 221. .
Thereby, the two housing main bodies 110 are rotatably held between the thick shaft portion 210 of the connecting member 200 and the head portion 221 of the thin shaft portion 220.
Thereafter, the cover 140 is attached to the handle hole 122 of the large handle 120B in the manner already described. The cover 140 can be attached with a single action.
This completes the bag.

  Since the use method and operation of the bag described above are the same as those of a normal bag, the description thereof is omitted.

DESCRIPTION OF SYMBOLS 100 Housing body 110 Body body 111 Blade part 111A Blade 112 Connection part 112A 1st hole 112B 2nd hole 112C 3rd hole 113 Arm part 120 Handle 122 Handle hole 123 Handle latching part 123A Undercut part 124 Support part 130 Washer member 140 Cover 141 Lid part 142 Locking body 143 Cover locking part 300 Auxiliary mold 310 Undercut part forming part 400 Main mold

Claims (5)

Two housing main bodies each having a blade portion on the distal end side having a blade along the inner side, an arm portion on the proximal end side thereof, a connecting portion positioned between the blade portion and the arm portion, and two Two housings having the arm part of the housing body and a handle that covers the front side surface of the connecting part;
A connecting member that caulks the two casings together so as to be rotatable at the connecting portion of each casing body;
With
The first handle, which is at least one of the handles, is a hole extending from the inner peripheral surface to the center thereof at a position caulked by the connecting member of the connecting portion in the housing to the front side surface of the connecting portion. The handle has a handle hole formed with a handle latching portion having an undercut portion that is a gap between the outer surface of the connecting portion, and the handle hole has a cross-sectional shape corresponding to the cross section of the handle hole. The lid portion having the shape and the underlock portion of the handle locking portion provided on the back side surface of the lid portion are locked to the front side surface portion of the coupling portion of the handle locking portion. A cover for closing the outer surface of the handle hole having a locking body having a cover locking portion,
A method of manufacturing the first handle of the heel,
A preparation process for preparing a housing body having an undercut hole which is a hole located at a position corresponding to the vicinity of the outer edge of the handle hole;
A first mold, which is a mold that covers a portion of the handle locking portion that does not face the undercut portion, is disposed close to the housing body, and the first handle is disposed between the first mold and the first mold. Forming a second mold having an undercut portion forming portion that occupies an undercut portion of the handle engaging portion, and forming the undercut hole from the back side surface of the housing body to the front side surface side A mold placement process in which the undercut part forming part penetrating toward the bottom part occupies the undercut part and is arranged close to the housing body;
A resin curing process in which a molten resin is filled and cured between the first mold frame and the second mold frame;
By removing the first mold and the second mold, a mold removal process using the cured resin as a first handle of an integrated object,
The manufacturing method of the 1st handle which has this. In the preparation process, a housing body having a plurality of undercut holes is prepared,
In the mold placement process, the second mold having a plurality of undercut portion forming portions respectively corresponding to the plurality of undercut holes, and the undercut hole from the back side to the front side of the housing body. Each of the undercut portion forming portions penetrating toward the occupies the undercut portion, and is arranged close to the housing body,
Thereby, a plurality of handle locking portions are formed,
The manufacturing method of the 1st handle of Claim 1. The first mold frame and the second mold frame cooperate to create a gap on both sides of the handle locking portion in a planar direction parallel to the front side surface of the housing body. ,
The manufacturing method of the 1st handle of Claim 1 or 2. The first mold frame and the second mold frame cooperate with the back side surface of the cover lid portion at a portion of the handle hole that contacts the front side surface of the housing body. , And so as to form a support portion for supporting the cover,
The manufacturing method of the 1st handle of Claim 1 or 2. Combining the housing in which the first handle is manufactured by the first handle manufacturing method according to claim 1 or 2 and another housing, to manufacture the bag.
A method for producing firewood.

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