JP2673645B2 - Speaker grill manufacturing method and equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for manufacturing a speaker grill mounted on the front surface of a speaker box of an audio device. More specifically, the present invention relates to a method and a device for manufacturing a speaker grill in which cloth is stretched over the front surface of a grill frame.

[0002]

2. Description of the Related Art Conventionally, a cloth is stretched and fixed on the front surface of a grill frame by (1) a method of fixing a cloth with a clasp such as a staple while grasping and pulling the cloth, and (2) a pin while gripping and pulling the cloth It is carried out by a method of temporarily fixing it to the grill frame with an adhesive, and (3) a method of gripping and pulling the cloth while temporarily fixing it to the grill frame with a pin or the like and then heat-sealing it with a heating plate.

[0003]

However, any of the above methods (1) to (3) is a manual work, and the manufacturing efficiency is poor, and there is a problem that it is not suitable for mass production. In addition, since fixing or temporary fixing is performed one by one, it is difficult to apply a uniform tension and the fabric is easily wrinkled, so that there is a problem that skill is required for the work.

The present invention has been made in view of the above problems, and an object of the present invention is to make it possible to stretch a cloth on a grill frame automatically with a simple device.

[0005]

Means for solving the problem will be described with reference to FIG. 1. In the invention of claim 1,
The grill frame 1 with the front surface facing upward is supported from below with a space left below the outer peripheral edge of the grill frame 1, and the cloth 2 is put on the grill frame 1 to cover the peripheral edge of the cloth 2. While hanging down from the outer peripheral edge of the grill frame 1, slightly below the grill frame 1, a tensioning tool 4 having a hooking tool 3 is advanced toward the center of the grill frame 1 to hook the peripheral edge of the fabric 2. The hook 3 is hooked by the means 3 and the tensioner 4 is attached to the grill frame 1
By advancing below the back surface of the grill frame 1, the peripheral edge of the cloth 2 is pushed under the back surface of the grill frame 1 to tension the cloth 2, and in this state, the cloth 2 is fixed to the back surface of the grill frame 1.

According to the invention of claim 3, the grill frame 1 having the front surface facing upward is left below the outer peripheral edge of the grill frame 1 so that the peripheral edge of the cloth 2 covered on the grill frame 1 is left. The receiving jig 5 that can be supported from below in a state where the portion hangs downward from the outer peripheral edge of the grill frame 1, and slightly below the grill frame 1 supported by the receiving jig 5 toward the center of the grill frame 1. A tensioning tool 4 that is capable of advancing below the back surface of the grill frame 1 and that is capable of hooking the peripheral edge of the cloth 2 that hangs downward when advancing, and a cloth when advancing the tensioning tool 4. 2 is a speaker grill manufacturing apparatus having fixing means 6 that can be fixed to the back surface of the grill frame 1.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an embodiment of the invention of claim 3 will be described with reference to FIGS.

As shown in FIG. 1, the present apparatus includes a substrate 7
It is provided with an intermediate plate 9 and an upper plate 10 which are supported by an upright supporting column 8 at a distance.

On the substrate 7, there is provided a pedestal 12 that slides on the substrate 7 by a receiving jig loading / unloading cylinder 11.

On the pedestal 12, a receiving jig 5 which is moved up and down by a receiving jig lifting cylinder 13 is provided.

The receiving jig 5 supports the grille frame 1 with its front surface facing upward from below. In addition, the receiving jig loading / unloading cylinder 11 and the receiving jig lifting cylinder 13
For easy attachment and detachment of the grill frame 1 to and from the receiving jig 5.
This is for moving the receiving jig 5 between a mounting position of the cloth 2 described below and a mounting position of the grill frame 1.

The receiving jig 5 may be a device which is orientated at a mounting position of the cloth 2 which will be described later, but as in this embodiment,
It is preferable that the grill 11 can be easily attached to and detached from the receiving jig 5 if it can be moved by the receiving jig loading / unloading cylinder 11 and the receiving jig lifting cylinder 13.

As described above, the receiving jig 5 supports the grill frame 1 with its front surface facing upward, from below, but this support leaves a space below the outer peripheral edge of the grill frame 1. Is done in. That is, the grill frame 1 in this embodiment is supported by hanging the inner peripheral edge of the grill frame 1 on the receiving jig 5, and the outer peripheral edge of the grill frame 1 is supported in a state of protruding from the receiving jig 5 in an eaves shape. Has been done.

In this apparatus, the cloth 2 placed on the grill frame 1 supported by the receiving jig 5 is tensioned and fixed to the grill frame 1. The grill frame 1 is located below the outer peripheral edge of the grill frame 1. The supporting jig 5 supports the peripheral portion of the cloth 2 covered on the grill frame 1 with the space left in the grill frame 1.
It is for allowing it to hang downward from the outer peripheral edge of.

At the center of the middle plate 9, there is provided an opening 14 through which the receiving jig 5 supporting the grill frame 1 moves up and down. Around this opening 14, a tensioner advancing / retreating cylinder 15 advances and retracts. A tensioning tool 4 is provided. The receiving jig 5 supporting the grill frame 1 is used when the fabric 2 is attached.
Is raised to a position slightly above the tensioning tool 4, and this raised position is the attachment position of the cloth 2.

As shown in FIG. 2, four tensioning tools 4 are provided so as to surround the opening 14 at the center of the middle plate 9.
Each tensioning tool 4 has a shape in which a frame body having an inner peripheral edge slightly smaller than the outer peripheral edge of the grill frame 1 to which the cloth 2 is attached by this device is cut at the central portion of each side and divided into four. On each front surface (opening side), hooking means 3 is provided over the entire width.

When the hooking means 3 moves forward, the cloth 2
The peripheral edge of the cloth 2 hanging downward from the outer peripheral edge of the grill frame 1 at the mounting position is hooked, and for example, a needle or a saw-toothed protrusion can be used. The hooking means 3 shown in the figure is a needle, and when this needle is used, the protrusion height is 3 to 10
mm, and the interval is preferably 5 to 30 mm.

The tensioning tool 4 in this embodiment has a shape in which the frame is divided at the center of each side as described above, but a similar frame is divided in each corner. It is also possible to divide into two, three, five, or more.

Each of the tensioning tools 4 is moved forward and backward toward the center of the grill frame 1, and at the time of forward movement, at least the front end of the tension tool 4 enters the lower part of the rear surface of the grill frame 1 which has been raised to the attachment position of the cloth 2. It has become a thing. In addition, on the upper surface of each tensioning tool 4, at a position to enter below the rear surface of the grill frame 1 when moving forward,
Fixing means 6 for fixing the cloth 2 to the back surface of the grill frame 1.
Is provided.

The fixing means 3 in this embodiment is a heating portion that electrically generates heat as shown in FIG.
When the fabric 2 is made of a heat-fusible material, that is, made of thermoplastic synthetic resin and synthetic fiber, the two are heat-fusible.

The fixing means 3 may be, in addition to the heating portion, means for driving a stopper such as a staple or the like,
Further, it may be provided separately from the tensioning tool 4.

Above the receiving jig 5, there is provided a holding jig 17 which is moved up and down by a holding jig lifting cylinder 16 attached to the lower surface of the upper plate 10. This holding jig 1
7 is lowered when the grill frame 1 is at the attachment position of the cloth 2 and the tensioning tool 4 is moved forward, and the grill frame 1 is pressed together with the cloth 2 covered thereon, and the receiving jig 5
Is pushed down, and the back surface of the grill frame 1 is pressed against the fixing means 6 of the tensioning tool 4.

As described above, the holding jig 5 is lowered and the receiving jig 5 is lowered, whereby the fixing means 6 on the rear surface of the grill frame 1 is lowered.
In the case of pressing against, the receiving jig 5 is preferably elastically movable up and down at least at the attachment position of the cloth 2. In order to obtain this elastic vertical movement, it is easiest to use the receiving jig lifting cylinder 13 as an air cylinder, but a spring is interposed between the rods of the receiving jig 5 and the receiving jig lifting cylinder 13. You can also get things like that.

Further, the receiving jig 5 is not allowed to move up and down elastically as described above, and the holding jig 17 is lowered to hold down the grill frame 1, and then the middle plate 9 is raised along the support column 8. By doing so, the fixing means 6 and the back surface of the grill frame 1 can be brought into pressure contact with each other.

Next, the invention of claim 1 will be described together with the operation of the above apparatus.

First, with the receiving jig 5 protruding from below the middle plate 9 and the upper plate 10, the grill frame 1 is set on the receiving jig 5 with its front surface facing upward, and the cloth 2 is placed on the grill frame 1. Cover.

The cloth 2 is the same as that used in a general speaker grill, and a fiber cloth is generally used. Specific examples include polyester, polyamide,
A knitted fabric of synthetic fiber such as acrylic is mentioned.

The cloth 2 is cut into a larger size than the grill frame 1, and is covered on the grill frame 1 with its peripheral edge hanging from the outer peripheral edge of the grill frame 1.

After the grill frame 1 and the cloth 2 are set as described above, the receiving jig loading / unloading cylinder 11 is operated to move the receiving jig 1 to just below the opening 14 of the intermediate plate 9.

Then, the receiving jig elevating cylinder 13 is operated to raise the receiving jig 5 to the attachment position of the cloth 2. Thereby, the grill frame 1 supported by the receiving jig 5
The back surface of the device is located slightly above the tensioning tool 4.

When the receiving jig 1 is positioned at the mounting position of the cloth 2 without providing the receiving jig loading / unloading cylinder 11 and the receiving jig lifting cylinder 13, the receiving jig 1 is fixed at this position. The grill frame 1 and the cloth 2 are set on the tool 1 and the cloth 2 is attached.

After setting the receiving jig 1 to the attachment position of the cloth 2,
The tensioner advance / retreat cylinder 15 is operated to move the tensioners 4 forward toward the center of the grill frame 1. The state at the start of the advance of the tensioning tool 4 is the state shown in FIG.

When the tensioning tool 4 is further advanced, as shown in FIG. 4 (b), the hooking means 3 provided on the front surface of the tensioning tool 4 hangs from the outer peripheral edge of the grill frame 1 to the cloth 2. The pulling tool 4 enters under the back surface of the grille frame 1 and pulls the cloth 2 to make it tight.

The tension of the cloth 2 due to the advance of the tensioning tool 4 may be performed by simultaneously advancing the tensioning tools 4 or by sequentially advancing it. However, in order to tension the fabric 2 without wrinkling, at least the grill frame 1
It is preferable that the tensioning tools 4 located at the positions opposite to each other with respect to each other are moved forward at the same time.

When the fabric 2 is likely to be wrinkled between the tensioners 4, as shown in FIG. 5, a small auxiliary tensioner 18 is interposed between the tensioners 4 which tend to cause wrinkles. By controlling the forward movement of the auxiliary tensioning tool 18, the occurrence of wrinkles can be prevented.

After tensioning the fabric 2 as described above,
As shown in FIG. 4C, the pressing jig elevating cylinder 16 is operated, the pressing jig 17 is lowered, the grill frame 1 is pressed from above the cloth 2, and the receiving jig 5 is pressed down.

When the receiving jig 5 is pushed down, the rear surface of the grill frame 1 is pressed against the fixing means 6 on the upper surface of the tensioning tool 4 with the peripheral edge of the cloth 2 sandwiched therebetween.
As described above, the fixing means 6 in this embodiment is a heating unit, and the peripheral portion of the cloth 2 is fused to the back surface of the grill frame 1 by heating by this heating unit.

After pressing by the pressing jig 17 for the time required for the fusion, the pressing jig 17 is raised by the pressing jig elevating cylinder 16 and the pressing tool 4 is moved by the expanding / retracting cylinder 15. Is retracted, and the hooking means 3 is removed from the cloth 2.

After that, the receiving jig 5 is lowered by the cylinder 13 for raising and lowering the receiving jig 5, and further, the receiving jig 5 is moved out from under the middle plate 9 and the upper plate 10 by the receiving jig loading / unloading cylinder 11. , Take out the grill frame 1 to which the cloth 2 is attached.

After that, the same cycle as before is repeated.

[0041]

Industrial Applicability The present invention is as described above, and the cloth 2 can be stretched over the grill frame 1 automatically by a simple device, which has heretofore been mostly done by hand, and the grill frame 1 can be automatically operated. The cloth 2 can be fixed to the cloth automatically, and the manufacturing efficiency of the speaker grill can be significantly improved.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of the invention of claim 3;

FIG. 2 is an enlarged plan view around a tensioning tool.

FIG. 3 is a perspective view of a tensioning tool.

FIG. 4 is an explanatory diagram showing a procedure of the invention of claim 2;

FIG. 5 is a plan view showing another embodiment of the tensioning tool.

[Explanation of symbols]

 1 grill frame 2 cloth 3 hooking means 4 tensioning tool 5 receiving jig 6 fixing means 7 substrate 8 pillar 9 middle plate 10 upper plate 11 receiving jig loading / unloading cylinder 12 pedestal 13 receiving jig lifting cylinder 14 opening 15 addition Cylinder for tensioning / retracting 16 Cylinder for holding jig Elevating cylinder 17 Holding jig 18 Auxiliary tensioning tool

Claims (4)

(57) [Claims] 1. A grill frame having a front surface facing upward is supported from below with a space left below the outer peripheral edge of the grill frame, and a cloth is put on the grill frame to fix the peripheral edge of the cloth. While hanging downward from the outer peripheral edge of the grill frame, slightly below the grill frame, a tensioning tool having a hooking tool is advanced toward the center of the grille frame, and the peripheral edge portion of the cloth is hooked by the hooking means, A speaker grill characterized in that by advancing the tensioner below the rear surface of the grill frame, the peripheral edge of the cloth is pushed below the rear surface of the grill frame to tension the cloth, and in this state the cloth is fixed to the rear surface of the grill frame. Manufacturing method. 2. A heat-weldable grille frame and cloth are used, and the grille frame is pushed down from above with the cloth tensioned, and the back surface of the grille frame is brought to the upper surface of the tensioning tool via the peripheral edge of the cloth. The method for manufacturing a speaker grill according to claim 1, wherein the cloth is fused to the back surface of the grill frame by pressing and heating the heating portion provided on the upper surface of the tensioning tool. 3. The grill frame with the front surface facing upward is left below the outer peripheral edge of the grill frame, so that the peripheral edge of the cloth covered on the grill frame hangs downward from the outer peripheral edge of the grill frame. With a receiving jig that can be supported from below in the state, and slightly below the grill frame supported by the receiving jig, it is possible to advance to the bottom of the grill frame toward the center of the grill frame,
Moreover, it has a tensioning tool provided with hooking means capable of hooking the peripheral edge of the downwardly hanging cloth when moving forward, and a fixing means capable of fixing the cloth to the back surface of the grill frame when the tensioning tool moves forward. Speaker grill manufacturing equipment. 4. The receiving jig is elastically movable up and down, and a holding jig is provided above the receiving jig so as to descend and press the receiving jig together with the grille frame downward. 4. The speaker grill manufacturing apparatus according to claim 3, wherein a heating unit is provided as a fixture at a position on the upper surface of the tensioning tool, which is located below the rear surface of the grill frame when the tensioning tool is moved forward.