JPH075561U - knife - Google Patents

Abstract

(57) [Abstract] [Purpose] Improves the workability of assembling a knife that allows the blade plate to be projected and retracted straight from the holder. [Structure] A blade plate 2 and a slider 3 connected to the blade plate are slidably arranged in a holder 1, and a slider body 4 is provided.
Has two independent spring accommodating chambers 43, 43 for accommodating the springs 5, 5, and the slider retainer 6 is slidably fitted to the slider body to close the upper surfaces of the spring accommodating 43, 43. ,
A cam 62 protruding on the back surface is located between the spring accommodating chambers 43, 43 so that both ends of the cam 62 face each other so that they can enter the holes of the spring accommodating chambers 43, 43, and the cam surface is provided on the slider body. The engaging projection 41 at the tip of the bullet piece 42 is contacted, and the cam 62 is moved by operating the slider retainer 6 to restrict engagement / disengagement of the engagement projection 41 with respect to the recess 13 formed in the holder. A cutter that clamps and releases the plate.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a feeding knife that slides a blade plate into and out of a holder.

[0002]

[Prior art]

 Conventionally, knives have been put into practical use in which a straight blade plate is slidably housed in a sheath-shaped holder and the blade tip is retracted from one end of the holder. When the above-mentioned knife is used, when a strong pressing force or traction force is applied to the blade edge, the blade plate is pushed into the holder or pulled out, which is difficult to use and there is a risk of finger injury. Therefore, the applicant previously proposed a knife that allows the blade plate to protrude from the holder by an arbitrary length and clamp the blade plate in this state (Japanese Utility Model Publication No. 46-28160).

As shown in FIGS. 5 to 8, the blade groove (2) is attached to the guide groove (11) of the holder (1) and the slider (3) detachably connected to the blade plate (2). It is slidably arranged, and the engaging projection (41) at the tip of the bullet (42) provided on the slider (3) is disengaged from the recess (13) formed in the holder (1), and the blade plate (2) Clamp and release the clamp. A cam plate (8) is slidably provided in the slider (3) in the sliding direction of the slider (3), and a pair of springs (5) are provided between both ends of the cam plate (8) and the inner wall of the slider (3). The spring (5) is prevented from escaping by the cover plate (9) which is interposed with (5) and fixed to the slider (3). A ridge (82) is formed in the center of the lower surface of the cam plate (8), and valleys (83) and (84) are formed on both sides of the ridge (82), and the ridge (82) and the valley (83) (84) are formed. The engaging projection (41) of the bullet piece (42) is located in the slide transition path of (4).

The cam plate (8) is provided with a finger rest (81) protruding outward through the laterally long hole (91) formed in the lid plate (9) with a margin. When the finger rest (81) is slid in the blade plate feeding direction, the engaging projection (41) is made to correspond to the valley portion (83) of the cam plate (8), and the engagement from the recess (13) of the holder (1). The fitting protrusion (41) is allowed to escape, whereby the slider (3) and the blade plate (2) slide in the feeding direction. When the blade plate (2) protrudes from the holder (1) by a desired length, the finger rest (81) is released.

The crests (82) of the cam plate (8) that slides integrally with the finger rest (81) push the engaging protrusions (41), and the engaging protrusions (41) are recessed (13) in the holder (1). ) And clamp the blade (2). This ensures that the blade plate (2) does not slip out of the holder (1) or retract during use of the knife. When the finger rest (81) is slid in the drawing direction of the blade plate (2), the pressing of the engagement protrusion (41) by the cam plate (8) is released, and the slider (3) and blade plate (2) are slid. Then, the blade plate (2) can be stored in the holder (1).

[0006]

[Problems to be solved by the device]

 In the above knife with a clamp function, the thin shaft portion (85) is formed at both ends of the cam plate (8), and the end portion of the spring (5) is fitted to the thin shaft portion to hold the spring (5). The springs (5) and (5) should be fitted to both ends of the cam plate (8), and both springs (5) and (5) should be assembled in the slider body (4) in a compressed state. 5) was easily dislodged from the cam plate (8) and jumped, and there was a problem in assembly workability.

A cover plate (9) is attached to prevent the spring (5) from bending outward when the one spring (5) is compressed by sliding the cam plate (8). I have to do it. In addition, since the finger hook (81) is exposed from the long hole (91) formed in the cover plate (9), the finger hook (81) cannot be increased and the operability is poor. According to the present invention, the two springs (5) and (5) are housed in the spring accommodating chambers (43) and (43) which are independent of each other, thereby facilitating the assembling of the spring (5), and further, the conventional lid plate. In the present invention, the knife (9), the finger rest (81) and the cam plate (8) can be realized with only one slider retainer (6), the number of parts can be reduced, and the configuration can be simplified. It is something to do.

[0008]

[Means for solving the problem]

 In the knife of the present invention, a blade plate (2) and a slider (3) connected to the blade plate are slidably arranged in a holder (1), and an elastic piece with an engaging projection ( 42) engages with the recess (13) formed in the holder (1), and the cam (62) slidably arranged on the slider (3) regulates the movement of the bullet (42), and the slider (3) And a knife for holding or releasing the blade plate (2) at a fixed position, the slider (3) can slide on the slider body (4) and the body (4) in the sliding direction of the body. The slider body (4) has two independent spring accommodating chambers (43) (43) with open sides on the slider retainer (6) mounting side. Inside both spring accommodating chambers (43) (43), opening (44) (44) is formed in the opposite surface of each spring accommodating chamber (43) (43) formed at both ends in the sliding direction. The springs (5) and (5) are accommodated in the slider holder (6), and the slider retainer (6) covers the two spring accommodating chambers (43) and (43) of the slider body (4) and the cam (62) protruding from the rear surface thereof. ) Is positioned between both spring accommodating chambers (43) (43), and both ends of the cam (62) are opposed to the openings (44) (44) of the spring accommodating chambers (43) (43) so that they can enter. Moreover, the cam surface faces the engaging projection (41) at the tip of the bullet piece (42).

[0009]

[Action and effect]

 Since the springs (5) are housed one by one in the spring housing chamber (43), the work of compressing the springs (5) and housing them in the spring housing chamber (43) is performed by two springs (5) as in the conventional case. The workability is greatly improved as compared with the work of fitting (5) on both ends of the cam plate (8) and fitting it on the slider body (4) in a compressed state. Since the slider retainer (6) is slidably attached to the slider body (4) and the cam (62) for controlling the movement of the engaging protrusion (41) is provided on the back surface of the slider retainer (6), the conventional knife The functions of the lid plate (9), the finger rest (81) and the cam plate (8) can be satisfied by one slider retainer (6), the number of parts can be reduced, and the configuration can be simplified.

[0010]

【Example】

 As shown in FIG. 1, a guide groove (11) is formed on one side surface of the sheath-shaped holder (1) having an enlarged depth over the entire length, and the guide plate (2) and the blade (2) are provided in the guide groove (11). A slider (3) detachably connected to the plate (2) is slidably fitted, and a stopper cap (7) is attached to the end of the guide groove (11) on the slider (3) side. At one opening edge of the groove of the holder (1), recesses (13) (13) for positioning the feeding length of the blade plate (2) are formed at equal intervals. The blade plate (2) has a hole (21) at the inner end for connecting the slider (3).

The slider (3) is composed of a slider body (4) and a slider retainer (6) fitted to the slider body (4) so as to be slidable in the sliding direction. The slider body (4) has a block (47) protruding from a rectangular plate piece (40) fitted in the guide groove (11) and fitted in a narrow opening of the guide groove (11). . A short protrusion (31) corresponding to the thickness of the blade plate (2) is formed on the back surface of the plate piece (40), and the protrusion (31) is fitted into the hole (21) of the blade plate (2). (2) and the slider body (4) are connected.

At both ends of the block (47), spring accommodating chambers (43) and (43) which are separate from each other are opened, and both spring accommodating chambers (43) and (43) are attached to the side of the slider retainer (6). Has a side surface open, and an opening (44) into which the tip of a cam (62) described later fits is formed in the center of the opposing surface of both spring accommodating chambers (43) (43). Below the one spring accommodating chamber (43), an elastic piece (42) bendable in a vertical plane is formed integrally with the slider body (4), and the elastic piece (42) is formed in the slider body (4). Of the spring, the free end of which is located below the spring accommodating chambers (43) (43) and which is engaged with the recess (13) of the holder (1). (41) is formed. The springs 5 and 5 are accommodated in the spring accommodating chambers 43 and 43 in a slightly compressed state. Grooves (49) and (49) are formed on the upper and lower surfaces of the block (47) of the slider body (4) in the sliding direction of the slider body (4).

The slider retainer (6) is formed of a synthetic resin in a horizontally long plate shape, and the protrusions (66) formed over the entire length from the upper and lower edges of the surface are attached to the block (47) of the slider body (4). It is slidably engaged with and attached to the grooves (49) (49) formed on the upper and lower surfaces of the. To attach the slider retainer (6), press the slider retainer (6) against the side surface of the block (47) and elastically deform the resin to push open between the ridges (66) (66) to open the ridge (66). Fit the groove (49) into the groove.

A plate cam (62) for restricting the movement of the elastic plate pressing piece (48) projects in the approximate center of the back surface of the slider pressing (6). When the slider retainer (6) is fitted into the slider body (4) and assembled, the cam (62) is located between both spring accommodating chambers (43) (43), and both ends are the spring accommodating chamber (43). ) Opening (4
4) is formed into a flat body capable of penetrating into, and the lower surfaces of both ends of the flat body are valleys (64) (65),
The lower surface between the valleys (64) and (65) is the ridge (63). When the cam (62) is in the neutral position, both ends are located just before the opening (44) of the spring accommodating chamber (43), and the ridge (63) presses the free end of the bullet (42). Then, the engaging protrusion (41) is made to bite into the recess (13) of the holder (1), and the holder (1) and the blade plate (2) can be clamped. When the slider retainer (6) is slid to the right or left, the cam (62) presses the spring (5) on the slide side, and the valley surface of the cam (62) causes the free end of the bullet (42). Corresponding to, the bullet (42) is returned to the original shape, the engaging projection (41) is released from the recess (13) of the holder (1), and the clamp of the holder (1) and the blade plate (2) is released. it can.

On the block (47) of the slider body (4), a pressing piece (48) for preventing the retaining cap (7) from coming out is provided on the opposite side of the blade plate feeding side. As shown in FIG. 4, the retaining cap (7) is made of synthetic resin so as to close the opening on the base end side of the holder (1), and the guide groove (11) of the holder (1) is formed at the center of the inner end. An elastic plate (71) that fits in the base plate is projected, and a protrusion (72) formed on the elastic plate (71) is fitted in an engagement hole (12) formed in the groove bottom of the holder (1). When the slider (3) is retracted, the elastic plate retainer piece (48) of the slider (3) presses the retaining cap (7) in the escape direction, but at the same time, the elastic plate retainer piece (48) does not retain. The elastic plate (71) of the cap (7) is covered with the elastic plate (71) to prevent elastic deformation of the elastic plate (71), that is, the protrusion (72) from coming out of the engagement hole (12). This ensures that the retaining cap (7) is prevented from coming off the rider (3).

However, when the slider retainer (6) is slid in the feeding direction of the blade plate (2), the engaging projection (41) is caused to correspond to the valley portion (65) of the cam (62) and the bullet piece (42). The upward movement, that is, the engaging projection (41) is allowed to come out from the recess (13) of the holder (1), whereby the slider (3) and the blade plate (2) slide in the feeding direction. When the blade plate (2) projects from the holder (1) to the desired length, release the slider retainer (6). The ridge (63) of the cam (62) that slides with the slider retainer (6) engages with the engaging protrusion (4).
1) Press to engage the engaging projection (41) with the recess (13) of the holder (1), and then the blade plate (2)
Crump. This ensures that the blade plate (2) does not slip out of the holder (1) or retract during use of the knife.

When the slider retainer (6) is slid in the retracting direction of the blade plate (2), the pressing of the engagement protrusion (41) by the cam plate (8) is released, and the slider (3) and blade plate (2) are released. ) Can be slid to store the blade plate (2) in the holder (1). Since the knife of the present invention accommodates the springs (5) one by one in the spring accommodating chamber (43), the two springs (5) (5) are fitted to both ends of the cam plate (8) as in the conventional case. Assembly workability is significantly improved compared to the work of fitting the slider body (4) in a compressed state. Also, the slider retainer (6) is slidably attached to the slider body (4), and the cam (62) for controlling the movement of the bullet (42) is provided on the back surface of the slider rider (6) so that the number of parts is reduced. The number can be reduced and the configuration can be simplified. The present invention is not limited to the configuration of the above embodiment, and various modifications can be made within the scope of the claims for utility model registration.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a blade plate clamped state of a knife.

FIG. 2 is an explanatory view of a blade plate clamp release state of a knife.

FIG. 3 is an exploded perspective view of a slider body and a slider retainer.

FIG. 4 is an explanatory diagram of a clamp operation of the retaining cap.

FIG. 5 is a front view of a conventional knife.

FIG. 6 is an explanatory view of the same blade plate clamping state as the above.

FIG. 7 is an explanatory diagram of a state where the blade plate clamp is released in the above.

8 is a sectional view taken along the line AA of FIG.

[Explanation of symbols]

 (1) Holder (2) Blade plate (3) Slider (4) Slider body (41) Engagement protrusion (42) Bullet piece (5) Spring (6) Slider retainer (62) Cam

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[Procedure amendment]

[Submission date] August 5, 1993

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

Claims (1)

[Scope of utility model registration request] 1. A bullet piece (42) with an engaging projection provided on a slider (3), wherein a blade plate (2) and a slider (3) connected to the blade plate are slidably arranged in a holder (1). The holder
A cam (62) slidably arranged on the slider (3) restricts the movement of the bullet (42) by engaging with the recess (13) formed in (1), and the slider (3) and the blade plate ( 2) Hold the slider in place or release it from the slider.
(3) is composed of a slider body (4) and a slider retainer (6) mounted on the body (4) so as to be slidable in the sliding direction of the body, and the slider body (4) has a slider retainer (6). 6) Two independent spring accommodating chambers (43) (43) with open side surfaces are formed at both ends in the sliding direction, and openings (44) are formed on opposite surfaces of the spring accommodating chambers (43) (43). )
(44) is opened, and springs (5) and (5) are placed in both spring storage chambers (43) and (43).
The slider retainer (6) covers the two spring accommodating chambers (43) (43) of the slider body (4), and the cam (62) projecting from the back surface of the slider accommodating chamber (43) (43) ( 43) so that both ends of the cam (62) are connected to the openings (44) (4) of the spring accommodating chambers (43) (43).
4) A knife having a cam surface facing the engaging projection (41) at the tip of the bullet piece (42) so as to be able to enter the knife.