JPH07117828B2 - Piano hammer manufacturing method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a piano hammer manufacturing method in which the number of manufacturing steps is reduced in a piano hammer in which a hammer felt is wound around a hammer wood and adhesively pressed.

(Prior Art) Conventional hammer manufacturing methods for piano include bonding, deburring,
It consists of cutting and finishing steps, and the adhering step forms the wood base plate 1 which is a horizontally long rectangular plate that has been previously formed in the shape of a side hook,
After cutting this with a predetermined width dimension in a direction perpendicular to the tip surface, a single hammerwood 1A is formed, and as shown in FIG. 3, a large number of single hammerwoods 1A are arranged in parallel and packed in a wood case 3. After that, the hammer felts 2 having the same length as the juxtaposed hammer woods 1A are adhesively clamped by the mold 4 along the hook surface of the hammer woods 1A.

Next, in the deburring step, as shown in FIG. 4, the protruding burrs 2B formed on the surface of the hammer felt 2 by adhesive pressing with the mold 4 are scraped off with sandpaper so as to be smooth.

Next, in the cutting step, the hammer felt 2 of a long-sized hammer body as shown in FIG. 5 is pressed by the pressing blade 6 to the single width dimension of the hammer wood 1A to form a single piano hammer.

Next, in the finishing step, the fluff on the surface of the hammer felt 2 caused by the cutting by the pressing blade 6 was finished smoothly and beautifully by the sander 7 as shown in FIG. 6 to manufacture the piano hammer.

(Problems to be Solved by the Invention) In the conventional method for manufacturing a piano hammer described above, the wood base plate 1 is predetermined in the bonding step. In the conventional method for manufacturing a piano hammer described above, the wood base plate 1 is bonded in the bonding step. After cutting to a predetermined width dimension to form a single hammerwood 1A, a large number of this single hammerwood 1A must be arranged in parallel in the wood case 3 to bond the hammerfelts 2 to each other. Since the hammer felt 2 is cut by 6 as shown in FIG. 7, there are drawbacks such that the side surface of the hammer felt 2 is wavy or bent, and the width cannot be kept constant.

(Means for Solving Problems) In order to solve the above-mentioned problems and drawbacks, the present invention provides
In a method of manufacturing a piano hammer in which a hammer felt 2 is wrapped around a hammer wood 1 and fixed to be cut into a required width, a hammer felt is formed along a hook face of a horizontally long rectangular hammer wood base plate 1 whose side faces form a hook shape. 2 is wound and fixed, and a paint or the like for preventing fuzz at the time of cutting is applied to the root portion 2A on one side of the hammer felt 2 and hardened, and then the tip of the hammer wood base plate 1 is cut with a saw blade 5. It is characterized in that the hammerwood blank 1 and the hammer felt 2 are simultaneously cut into a piano hammer having a required width from the non-painted surface of the hammer felt 2 toward the paint applied surface in a direction orthogonal to the surface.

That is, the present invention simplifies the cutting process by cutting the hammerwood blank 1 and the hammer felt 2 at the same time without forming a single hammerwood 1A. The bending and waviness of the hammer felt 2 and the unevenness of the width of the hammer felt 2 caused by the push-cutting of 6 are solved and the root portion 2A of the hammer felt 2 is hardened with a paint to prevent the fuzz caused by the cutting of the saw blade 5. It is something that is done.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In the method of manufacturing a piano hammer according to the present invention, a hammer wood base plate 1 of a horizontally long rectangular wood forming a measuring tip with a length to be inserted into a conventional wood case 3 is formed and then inserted into the wood case 3. . On the other hand, the hammer felt 2 is formed to have the same length as the hammerwood base plate 1, and then an adhesive is applied to one surface of the hammerwood base plate 1. Then, the hammer felt 2 is wrapped around the hook tip surface of the hammerwood base plate 1 by a conventional die 4 and pressure-bonded. The hammer body shown in FIG. 1 is obtained.

Next, an adhesive or paint, such as glue, glue, varnish, or acid-free clear lacquer, is lightly applied along the root portion 2A on one side of the hammer felt 2 adhered to the hammerwood base plate 1 and cured.

Then, as shown in the second illustration, the root of the hammer felt 2
The coating surface of 2A is the rotating direction of the blade of the circular saw machine 5 (the rotating surface of the blade is clockwise in FIG. 2, so the coating surface is downward).
It is placed on a table so that it becomes a single piano hammer by using a circular saw to cut the hammerwood blank 1 and the hammer felt 2 at a required width in a direction orthogonal to the tip surface of the hammerwood blank 1. To manufacture.

(Curing of the Invention) As described above, according to the present invention, the hammerwood blank 1
By simultaneously cutting the hammer felt 2 and the hammer felt 2 into a piano hammer of a required width with the saw board 5, it is not necessary to cut the hammerwood base plate 1 into a single hammerwood 1 as in the conventional case, and a single hammerwood is brought close Since it is not necessary to collect and bond the hammer felts 2 and to cut the adhered hammer felts 2, one cutting process can be performed, and the fluffing of the hammer felts at the time of cutting by the saw 5 can be made into the hammer felts. By applying paint or the like and curing it, the cutting can be performed to eliminate the bending, waviness and non-uniform width of the hammer felt 2 generated by the conventional push-cutting by the push-cutting blade 6, and the conventional finishing process can be omitted. It has the effect that can be done.

[Brief description of drawings]

FIG. 1 is a perspective view showing a method for manufacturing a piano hammer according to the present invention, FIG. 2 is a side view showing a method for cutting a piano hammer according to the present invention, and FIG. 3 is a perspective view showing a method for manufacturing a conventional piano hammer. FIG. 4 is a perspective view of a conventional piano hammer, FIG. 5 is a perspective view showing a cutting method of the conventional piano hammer, FIG. 6 is a front view of the conventional piano hammer, and FIG. 7 is a side view of the conventional piano hammer. It is a state diagram. In the figure, 1 ... Hammerwood 1A ... Hammerwood base plate 2 ... Hammer felt 2A ... Root part, 2B ... Burr 3 ... Wood case 4 ... Mold 5 ... Circular saw board 6 ... Press cut Blade 7 ... Thunder

Continuation of the front page (56) References JP-A-54-143221 (JP, A) JP-A-50-63910 (JP, A) Actually opened 60-191090 (JP, U) Actually opened 60-122984 (JP , U)

Claims (1)

[Claims] 1. A method for manufacturing a piano hammer in which a hammer felt 2 is wound around a hammer wood 1 and fixed thereto and cut into a required width. A hammer felt 2 is wound and fixed along the root of the hammer felt 2 at one side surface 2A.
After coating with a paint or the like to prevent fluffing at the time of cutting and curing, a saw blade 5 is used in a direction perpendicular to the hook tip surface of the hammerwood base plate 1 in a direction orthogonal to the paint-coated surface of the hammer felt 2 from the paint-coated surface. A method for manufacturing a piano hammer, characterized in that the hammerwood blank 1 and the hammer felt 2 are simultaneously cut into a piano hammer having a required width.