JP5035674B2 - Synthetic resin handle for frame - Google Patents

Description

The present invention relates to a handle body made of synthetic resin that is used by being assembled and fixed to the rear portion of the trunk portion of the housing.

In a large synthetic resin casing such as a PET bottle, there is a case where a synthetic resin grip body is assembled and fixed at the rear of the trunk portion in order to obtain a good gripping property.
For example, in Patent Document 1, as a typical example of such a handle-equipped housing, an assembly arm is connected to the upper and lower ends of the gripping portion, and the tip of each assembly arm is engaged. Described is a housing with a handle in which the handle body is firmly assembled in an undercut shape by biaxial stretching blow molding using a handle body by injection molding with a protruding protrusion as an insert material. Has been.
Further, without using the so-called insert molding as described above, it is possible to forcibly assemble and fix in an undercut shape by using a latching portion in which a handle body is formed on the body portion of the casing in a subsequent process.
JP 2001-341745 A

  Here, in particular, plastic products such as plastic bottles that are consumed in large quantities are required to be lighter from the viewpoint of environmental problems, resource saving, and reduction of raw material costs. It is necessary to reduce the weight of the housing as a whole, including the handle body. In the above-described handle body of Patent Document 1, the cross-sectional shape is an H-shaped structure, and rigidity is maintained.

An object of the present invention is to create a structure for achieving weight reduction without impairing the function as a handle body in a handle body having a H-shaped cross section.

The main configuration of the present invention in the means for solving the above technical problem is:
A synthetic resin handle that is used by being assembled and fixed to the rear part of the body of the frame, and has an upper assembly arm and a lower assembly arm connected to the upper end and lower end of the vertically long gripping part, respectively. Because
The gripping portion has a cross-sectional H-shaped structure in which a front plate piece located on the side where the upper assembly arm and lower assembly arm are connected to each other and a rear plate piece located on the opposite side are connected by a central rib,
In a predetermined height range excluding the upper end and lower end of this gripping part,
A portion extending over a predetermined height range centered on a substantially central height position of the rear side plate piece is an elongated portion in which the width of the rear side plate piece is narrowed to a constant width,
The width of the elongated portion is in a range of 30 to 70% of the width of the front plate piece portion that is opposed to the elongated portion,
Further, the height of the elongated portion is configured to be 50% or more of the total height of the handle body .

In the above configuration, the front-rear direction of the handle body is determined based on the posture assembled and fixed to the rear part of the body of the housing, that is, the side where the assembly arm is connected is the front side, and the opposite side is the rear side. Define as side.
The basic idea of the above configuration is to reduce the weight of the vertically long plate-like gripping portion corresponding to the portion gripped by the hand of the handle body, and its feature is the rear plate piece of the gripping portion having an H-shaped cross section. The width is reduced with respect to the front plate piece over a predetermined height range to reduce the weight.

  Thus, by narrowing the width of the rear plate piece over a predetermined height range, both the front plate piece and the rear plate piece are narrowed, the front plate piece is narrowed, Compared to the case where the entire handle body or the gripping part is made thin, the appearance, the feel of rigidity when gripped with the hand, ease of gripping, and the function as the handle body supporting the housing are greatly impaired. Therefore, the weight can be effectively reduced.

Further, an elongated portion narrowed to a predetermined width is disposed in a predetermined height range centered on the substantially central height position of the rear plate piece, and the width of the elongated portion is 70% or less of the width of the front plate piece portion. By making the height dimension 50% or more of the total height dimension of the handle body, effective weight reduction can be realized.

  Note that the lower limit of the lateral width of the elongated portion is determined by the lateral width of the central rib forming the H-shaped cross section, but is preferably 30% or more of the lateral width of the front plate piece in consideration of the appearance and the feeling during gripping.

  Still another configuration of the present invention is to form a flat back surface of the narrowed portion of the rear plate piece, and to form a wide flat portion on the back surface of the wide portion of the upper end portion and the lower end portion of the rear plate piece. In other words, the back surface of the narrowed portion and the wide flat portion are configured to be located on the same plane.

  When the handle body is assembled and fixed to the housing by insert molding, the handle body is mounted on the belt conveyor with the back surface of the rear plate piece of the gripping part in contact with the belt conveyor surface and conveyed to the blow molding machine. However, when the rear plate piece is narrowed by the configuration of the present invention, the grounding posture as described above lacks stability, and the handle body is not stable during transportation. The loading direction rotates or falls sideways, causing a conveyance trouble.

The above configuration prevents the trouble of conveyance due to the narrowing of the rear side plate piece, so that the back surface of the narrowed portion of the rear side plate piece and the wide flat portion are located on the same plane. By configuring the rear plate piece, the back surface of the narrowed portion and the wide flat portion are grounded to the belt conveyor surface.
In particular, the wide flat portions positioned on both sides of the narrowed portion can stably hold the ground contact posture on the belt conveyor surface, and can effectively prevent conveyance troubles.

  Still another configuration of the present invention is to reduce the lateral width of the front plate piece from the upper side in a predetermined height range in the portion from the lower surface of the base end portion of the upper assembly arm to the upper surface of the base end portion of the lower assembly arm. In this configuration, the width is gradually reduced toward.

  The above configuration is created in consideration of ease of gripping with a hand, and feels good when gripped with a hand, so that a comfortable gripping feeling can be obtained.

  In still another configuration of the present invention, the handle body is used as an insert material for a biaxial stretch blow molding of a synthetic resin casing, and is assembled and fixed in an undercut shape in a recess formed in the rear part of the body part. It is intended to be used.

  In the subsequent process, the handle body can be assembled and fixed using a locking portion formed on the body portion of the housing, but by the above configuration, the housing body is biaxially stretch blow molded using the handle body as an insert material. The grip body can be firmly attached to the housing in an undercut shape.

  Still another configuration of the present invention is a handle used as the insert material, wherein a locking protrusion is erected on the tip of an arm with a lower assembly obliquely upward and forward from the upper surface of the arm with the lower assembly. is there.

When this kind of handle body is assembled and fixed to the housing by insert molding, a locking projection piece is erected straight upward at the tip of the upper assembly arm and the lower assembly arm,
By using this locking projection piece, it is possible to obtain a solid undercut assembled state without rattling.
However, in the case of biaxial stretch blow molding, the softened resin cannot be deformed in close contact along the outer periphery of the locking projection piece due to stretch hardening due to stretching, and it is a firm underwear without rattling There is a risk that the cut assembled state will be damaged.

  Therefore, according to the above configuration, the locking projection piece standing on the lower assembly arm is set up diagonally upward and forward, thereby making the contact angle with the resin to be stretched and deformed oblique, It can be smoothly deformed along the outer peripheral shape, and a firm undercut assembly can be obtained.

In addition, if the inclination angle from the straight upward direction is too large, the locking protrusion may be pulled out from the undercut assembled state, so the inclination angle of the locking protrusion from the straight upward direction is 45 ° or less. More preferably, it is good to set it as the range of 15 degrees-30 degrees.
Moreover, it is preferable to stand upright in the straight upward direction without tilting the locking projection piece standing upright on the arm with the upper assembly that bears the function of directly supporting the weight of the housing.

Since the present invention has the above-described configuration, the following effects can be obtained.
In the main configuration of the present invention, by reducing the width of the rear plate piece over the predetermined height range with respect to the front plate piece, the appearance, the rigidity feeling when grasped by hand, etc. The weight can be effectively reduced without significantly impairing the feel, ease of gripping, and the function of the handle that supports the housing.

Further, an elongated portion narrowed to a predetermined width is disposed in a predetermined height range centered on the substantially central height position of the rear plate piece, and the width of the elongated portion is 70% or less of the width of the front plate piece portion. By making the height dimension 50% or more of the total height dimension of the handle body, effective weight reduction can be realized.

  In the case where the back surface of the narrowed portion of the rear plate piece and the wide flat portions of the upper end portion and the lower end portion are located on the same plane, the wide flat portions located on the upper and lower sides of the narrowed portion. By this unit, the grounding posture on the belt conveyor surface can be stably held, and conveyance troubles can be effectively prevented.

  In the case where the width of the front side plate piece is gradually reduced from the upper side to the lower side, the feeling when grasped with the hand is good and a comfortable gripping feeling is obtained.

  In the case of what is used as an insert material for blow molding of a synthetic resin casing, this handle body can be firmly assembled in an undercut shape to the casing body.

In the case where the locking projection piece of the arm with the lower assembly is erected diagonally upward and forward, the resin to be stretched can be smoothly deformed along the outer peripheral shape of this locking projection piece by insert molding, A firm undercut assembly without rattling can be obtained.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below along the examples with reference to the drawings.
FIG. 1 is a side view showing a state in which a synthetic resin grip body according to an embodiment of the present invention is assembled and fixed to the rear portion of a housing 1, FIG. 2 is a front view of the handle body 3, and FIG. 4 is a rear view, FIG. 5 is a plan view, and FIG. 6 is a bottom view.

  1 has a capacity of 1.8 L and is a biaxially stretched blow molded product of polyethylene terephthalate resin. Similarly, a polyethylene terephthalate resin is formed in a recess 2 formed in the rear part of the body of the casing 1. A handle body 3 which is an injection molded product is assembled and fixed as an insert material.

The handle body 3 is configured by connecting an upper assembly arm 6 and a lower assembly arm 8 forward from an upper end portion and a lower end portion of a vertically long plate-shaped grasping portion 4, respectively. The front side plate piece 4f and the rear side plate piece 4b located in the cross section are connected to each other by a central rib 5. (Refer to the plane sectional view along the line AA added in FIG. 3)
Similarly, the section from the base end portion to the tip end portion of the upper assembly arm 6 and the lower assembly arm 8 has an H-shaped cross section. (Refer to the plane sectional view along the line BB added in FIG. 3)

  In a predetermined height range H4 centered on the substantially central height position of the rear plate piece 4b, an elongated portion 4bn is formed by narrowing the lateral width Wbn to a constant width. (See Figure 4)

  On the other hand, the front side plate piece 4f is a portion corresponding to a portion from the lower surface of the base end portion of the upper assembly arm 6 to the upper surface of the base end portion of the lower assembly arm 8 (that is, a portion corresponding to a portion through which a fingertip is inserted during gripping). .) In the middle height range H3, the lateral width Wf of the front plate piece 4f is gradually reduced from the upper side to the lower side in consideration of ease of gripping by hand. The feel when grasped is good, and a comfortable grip feeling can be obtained. (See Figure 2)

  Then, the height dimension h4 of the elongated portion 4bn is set to 50% or more of the total height dimension h1 of the handle body 3, and the lateral width Wbn is set to be in the range of 30 to 70% of the lateral width Wf of the front plate piece 4f located at the opposite position. Thus, including the portion where the lateral width Wb widens from the upper end of the elongated portion 4bn and from directly below to the lower portion, the weight of the handle body 3 is at least about 20% due to such narrowing of the rear plate piece 4b. Can be reduced in weight.

Next, the structure which concerns on insert molding of the handle body 3 of a present Example is demonstrated.
At the tip of the arm 6 with the upper assembly, a locking projection piece 7 is erected straight upward with the upper surface of the arm 6 with the upper assembly as the base end.
On the other hand, the arm 8 with the lower assembly is formed while bending upward. At the tip, the locking projection 10 is erected obliquely upward and forward with the upper surface of the arm 8 with the lower assembly as the base end. . In the present embodiment, the inclination angle TH from the straight upward direction of the locking protrusion 10 is set to 22 °. (See Figure 3)

  Thus, by making the locking projection piece 10 in an inclined shape, the collision angle of the resin that collides with the locking projection piece 10 while extending and deforming is moderated, and this resin is aligned with the outer peripheral shape of the locking projection piece 10. Can be deformed smoothly, and a solid undercut assembly without rattling can be obtained.

  Moreover, the protrusion 11 which extends the upper surface of the arm 6 with an upper assembly back is formed from the back lower end part of the latching protrusion piece 7 of the arm 6 with an upper assembly (refer FIG.2, FIG.3, FIG.5). The cross-sectional shape of the protrusion 11 is an inverted trapezoidal shape that widens from the base end toward the upper end, and the rear end extends to the top of the front surface of the grip portion 4 through the base end portion of the upper assembly arm 6. .

  Here, by using the handle body 3 of the present embodiment as an insert material, the handle body 3 can be firmly assembled and fixed to the case body 1 as shown in FIG. However, there is a possibility that a pinhole may occur in the resin that stretches and deforms between the top of the locking protrusion 7 and the upper surface of the arm 6 with the upper assembly because of the locking protrusion 7 that stands upright.

  The above-described protrusion 11 has a function of reliably detecting such pinholes, and is formed in the casing 1 by the strain hardening effect accompanying the stretching deformation in the biaxial stretch blow molding. The resin does not deform in close contact with the shape of the ridge 11, and a gap is formed along the side surface of the ridge 11, and a communication path for venting air is formed by this gap, and the above-mentioned pressure is applied by pressurized air. Such pinholes can be reliably detected.

  Next, in the handle body 3 of the present embodiment, the back surface of the elongated portion 4bn of the rear side plate piece 4b is formed flat, and on the back surface of the wide portion positioned above and below the elongated portion 4bn, the entire width of the wide portion is set. The wide flat portion 4bs is formed so as to be flush with the back surface of the elongated portion 4bn, and the entire back surface is on the same plane in the height range H2. (See Figs. 3 and 4)

  By making the back surface like this, in particular, the wide flat portions 4bs formed on the upper and lower sides of the elongated portion 4bn can stably hold the mounting posture in which the back surface of the rear plate piece 4b is grounded to the belt conveyor surface. It is possible to effectively prevent a conveyance trouble in the belt conveyor resulting from the formation of the elongated portion 4bn.

Further, in this embodiment, as shown in a plane sectional view along the line AA added in FIG. 3, the front side of the narrowed rear plate piece 4b is tapered.
By making the handle body 3 tapered in this way, when the handle body 3 is automatically set in the mold, the handle body 3 is reliably and smoothly moved from the back side by the robot arm using the taper-shaped portion. Can be chucked.

As mentioned above, although the embodiment of the present invention has been described according to the example, the present invention is not limited to this example.
Although the handle body of the said Example is used as an insert material, the effect of this invention is generally exhibited in the handle body which has the holding part of a cross-section H type structure, and is a separate process. It can also be applied to a handle body that is assembled and fixed to a housing.

In addition, the grip body used as the insert material has a locking projection protruding from the tip of the upper assembly arm and the lower assembly arm as in this embodiment. In various forms, the moldability and assembly strength can be taken into consideration.

As described above, the synthetic resin grip body of the present invention can achieve further weight reduction without impairing the function of the handle body, and is expected to be used in a wide range of fields by being assembled and fixed to the housing. Is done.

It is a side view which shows the state which assembled and fixed one Example of the handle of this invention to the rear part of the housing. It is a front view of the handle body shown in FIG. It is a side view of the handle body shown in FIG. It is a rear view of the handle body shown in FIG. It is a top view of the handle shown in FIG. It is a bottom view of the handle body shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1; Housing 2; Concave part 3; Handle body 4; Grasping part 4f; Front side plate piece 4b; Rear side plate piece 4bn; Elongate part 4bs; Wide flat part 5; Central rib 6; 8; lower assembly arm 10; locking protrusion 11; ridge Wf, Wb, Wbn; lateral width H2, H3, H4; height range h1, h4; height dimension TH;

Claims (5)

The upper assembly arm (6) is attached to the upper end and the lower end of the vertically long plate-shaped grip (4).
And a synthetic resin grip body in which a lower assembly arm (8) is connected forward,
The gripping part (4) includes a front plate piece (4f) located on the side where the upper assembly arm (6) and lower assembly arm (8) are connected to each other, and a rear plate piece located on the opposite side ( 4b) has an H-shaped cross-section in which the central ribs (5) are connected,
In a predetermined height range excluding the upper end and the lower end of the gripping part (4),
The width (Wb) of the rear plate piece (4b) is narrowed to a constant width across a predetermined height range (H4) centered at the substantially central height position of the rear plate piece (4b). Elongated part (4bn),
The width (Wbn) of the elongate part (4bn) is in the range of 30 to 70% of the width (Wf) of the front plate piece (4f) located oppositely,
Further, the synthetic resin handle body configured such that the height dimension (h4) of the elongated portion (4bn) is 50% or more of the total height dimension (h1) of the handle body (3). Forming the back surface of the narrowed portion of the rear plate piece (4b) flat, forming a wide flat portion (4bs) on the back surface of the wide portion of the upper end portion and the lower end portion of the rear plate piece (4b), the width back and the wide flat portion of the narrowing portion (4bs) synthetic resin handle of claim 1, wherein configured to be positioned on the same plane. The width (Wf) of the front plate piece (4f) in the predetermined height range (H3) in the part from the lower surface of the base end of the upper assembly arm (6) to the upper surface of the base end of the lower assembly arm (8) The handle made of a synthetic resin according to claim 1 or 2 , wherein the width is gradually reduced from above to below. The synthesis according to claim 1, 2 or 3, which is used as an insert material for biaxial stretch blow molding of a casing made of a synthetic resin and is assembled and fixed in an undercut shape in a recess formed in the rear part of the body part. Resin handle. The synthetic resin casing with a handle according to claim 4 , wherein a locking protrusion (10) is erected on the tip of the lower assembly arm (8) obliquely upward and forward from the upper surface of the lower assembly arm (8). .

Images