JPH018874Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to heat exchangers such as radiators installed in automobiles, and more specifically relates to improvement of heat exchangers using resin tanks. .

[Conventional technology]

Conventionally, as this type of heat exchanger, the one disclosed in FIG. 2 of Japanese Utility Model Application Publication No. 56-72094 is known.

This heat exchanger has a tank and a seat plate integrated, but since there is no locking part between the tube and the seat plate, it is difficult to support the packing material, and
There was a problem that it was difficult to position the tank and tube.

Therefore, in order to solve this problem, the present applicant previously filed an application for a heat exchanger as shown in FIG. 1 (Utility Model Application No. 195771/1982).

This will be explained based on FIG. This heat exchanger consists of a resin tank 1, a packing material 5, a support plate 7, a tube 6, and fins (not shown) attached to the tube 6.

The resin tank 1 includes a seat plate portion 2 and a seat plate portion 2.
A pair of locking members 3 are integrally provided, projecting in parallel from both sides of the locking member and having protruding pawls 3a at both ends thereof facing each other. The packing material 5 is attached to the mounting hole 4 provided in the seat plate portion 2 of the resin tank 1 from the locking member 3 side of the resin tank 1. The support plate 7 comes into contact with the outer surface 5b of the packing material 5 attached to the mounting hole 4 provided in the seat plate 2 of the resin tank 1, and also contacts the protruding pawl 3a of the locking member 3 of the resin tank 1. It is locked on the locking surface 3c. The tube 6 passes through the support plate 7 and the through holes 7a, 5a of the packing material 5, and communicates with both the resin tanks 1,1.

According to this heat exchanger, a resin tank 1 is formed with a seat plate part 2, a packing material 5 is attached to this seat plate part 2, a support plate 7 is abutted from the outside of this packing material 5, and this support The protruding claws 3 of the locking members 3, 3 provided integrally with the seat plate 2 at both ends of the plate 7
a, 3a to hold the packing material 5 so that it does not fall off, and the tube 6 is held by passing through the packing material 5 and the through holes 7a, 5a of the support plate 7.

[The problem that the idea aims to solve]

However, in this heat exchanger, a pair of locking members 3 that protrude in parallel from both sides of the seat plate portion 2 and have protruding claws 3a at both ends thereof in the longitudinal direction so as to face each other are attached to a resin tank. 1, the mold for forming the resin tank 1 has a complicated structure. That is, the mold forming the inner side of the seat plate part 2 and the locking member 3 has a shape that is smaller than the protruding claw 3a in order to form the recess 3b that is formed on the inner wall of the locking member 3 over the entire length in the longitudinal direction. It also has no choice but to project outward.

As a result, when an attempt is made to remove the mold forming the inside of the seat plate portion 2 after molding the resin tank 1, the portion of the mold forming the recess 3b formed on the inner wall side of the locking member 3 protrudes. Its movement is prevented by the claw 3a.

Therefore, the inner mold has no choice but to be removed by force. Therefore, the outwardly protruding portion of the mold interferes with the protruding pawl 3a, resulting in a so-called undercut in which a notch is formed in that portion. As a result, in the protruding pawl 3a that is undercut, the locking surface 3c for receiving the support plate 7 is not uniform, and the support plate 7 cannot be supported sufficiently. Therefore, there is a problem in that the support of the packing material 5 supported by the support plate 7 is hindered, and the pressure resistance is reduced.

In addition, as a measure to prevent this undercut, it is possible to use a split type in which a placement piece with a width equivalent to the protruding pawl 3a is arranged at a location corresponding to the recess 3b inside the locking member 3. In this case, the mold structure is complicated, the installation and removal of the mold is complicated, the cost is high, and it is not practical.

The present invention was devised to solve these conventional problems, and its purpose is to provide a heat exchanger with improved pressure resistance without forming undercuts in the protruding claws.

[Means to solve the problem]

The heat exchanger according to the present invention includes a seat plate portion provided with a plurality of through holes for attaching packing materials, and protruding claws protruding in parallel from both sides of the seat plate portion and facing each other at both ends. A resin tank integrally provided with a pair of locking members having a plurality of tubes; ,
A packing material that is attached from the locking member side of the resin tank; and separate through holes drilled in correspondence with the through holes drilled in the packing material,
A locking surface of each protruding pawl that is in contact with the outer surface of the packing material installed in the mounting hole provided in the seat plate of the resin tank, and that is provided so as to oppose each other on the pair of locking members of the resin tank. The heat exchanger consists of a support plate that is locked at both ends; a tube that communicates between the two resin tanks by passing through the support plate and a through hole in the packing material; and a fin that is attached to the tube. The side wall of the locking member of the resin tank is provided with window holes at predetermined intervals, the upper end of which reaches the lower surface of the seat plate of the resin tank, and the lower end of which reaches the locking surface of the protruding pawl of the locking member. The protruding pawl of the locking member is provided only on the extension line of the portion where each window hole is provided.

[Effect]

In this invention, the protruding claws are provided only on the extension line of the part where the window hole is provided, so when molding the resin tank, the mold that forms the outside of the resin tank can be used to insert the protruding claws from the outside of the window hole. The mold is inserted to the inside of the locking member by the width, so that the mold located inside the locking member is not located closer to the inner wall of the locking member than the protruding pawl. As a result, the recess between the protruding pawl and the seat plate portion is formed by a mold that fits from the outside of the window hole, and the wall surface on the tip side of the protruding pawl is formed by the inside mold. Therefore, even if the inner mold is pulled out after formation, the mold will not interfere with the locking surface of the protruding pawl, and no undercut will occur.

In this way, a protruding pawl with no undercut is formed, so the locking surface that receives the support plate is uniform, making it possible to apply a uniform force to the packing material through the support plate, and improving pressure resistance. will improve.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 2 shows an embodiment of the heat exchanger according to the present invention, where 8 is a horizontally long cylindrical resin tank.

This resin tank 8 is integrally provided with a seat plate portion 9 and a pair of locking members 9b that protrude in parallel from both sides of the seat plate portion 9 and have protruding claws 14 at both ends thereof so as to face each other. It is something that

A large number of mounting holes 10 are provided in the seat 9a of the seat plate portion 9. Further, the side wall of the locking member 9b provided integrally with the resin tank 8 has a window hole whose upper end reaches the lower surface of the seat plate 9 and whose lower end reaches the locking surface 14a of the protruding pawl 14 of the locking member 9b. 13 are provided at predetermined intervals, and protruding pawls 14 of the locking member 9b are provided only on an extension line of the portion where the window holes 13 are provided.

As shown in FIG. 3, the protruding pawl 14 has a substantially triangular cross-sectional shape, and each of the locking surfaces 14a, 14a, 14a, 14b, 14b, 14b, 15b, 15b, 15b, 15b, 15b, 15b, 15b, 15b, 15b,
4a has a width β that is the same as or smaller than the width α of the window hole 13. Further, as shown in FIG. 2, in the case of an upper tank, this protruding claw 14 is located at the lower side of the window hole 13, and in the case of a lower tank (not shown), it is located at the upper side of the window hole 13. There is.

A large number of mounting holes 10 are provided in the seat 9a of the seat plate portion 9.
A packing material 11 is separately attached to the resin tank 8 from the space between the pair of locking members 9b. This packing material 11 has through holes 1 for fitting a plurality of tubes 12 into each one.
A plurality of holes 2a are drilled.

Support plates 15 having a U-shaped cross section are attached to both ends of the tube 12. The tip of each tube 12 passes through each through hole 11a of the packing material 11, and its opening is opened into the resin tank 8.

The support plate 15 has a U-shaped cross section, and has a flat portion 1.
5a has a flat part 15c that abuts from the outer surface 11b of the packing material 11 installed in the mounting hole 10 of the seat plate part 9, and this flat part 15c has a through hole for fitting a plurality of tubes 12 individually. 15a
is drilled. Further, the support plate 15 has both ends 15b fitted with protruding claws 1 so that the tube 12 does not fall off after being fitted into the packing material 11.
4 and 14, respectively.

Next, the operation of this embodiment configured in this manner will be explained.

In this embodiment, since the protruding pawl 14 is provided only on the extension line of the part where the window hole 13 is provided, the mold that forms the outside of the resin tank 8 when molding the resin tank 8 is attached to the window hole 13. from the outside to the inside of the locking member 9b by the width of the protruding pawl 14, so that the mold located inside the locking member 9b is not located closer to the inner wall of the locking member 9b than the protruding pawl 14.

As a result, the locking surfaces 14a, 14a of the protruding claws 14
The recess 9c between the seat plate 9a and the window hole 1
The mold that fits from the outside of 3 is molded, and the protruding claw 1
The inner inclined surfaces 14b, 14b of 4 are the seat plate portion 9a.
The inner walls forming the inner sides of the locking members 9b, 9b are formed. Therefore, even if the inner mold is pulled out after forming, it will not interfere with the locking surface 14a of the protruding pawl 14, and no undercut will occur.

In this way, the protruding pawl 14 without an undercut is formed, so that the locking surface 14 for receiving the support plate 15 is
a becomes uniform, and as shown in FIGS. 2 and 3, it becomes possible to apply a uniform force to the packing material 11 via the support plate 15, and the pressure resistance is improved.

[Effect of idea]

As described above, the present invention provides a window hole in the side wall of the locking member of the resin tank, the upper end of which reaches the lower surface of the seat plate of the resin tank, and the lower end of which reaches the locking surface of the protruding pawl of the locking member. In addition to being provided at predetermined intervals, the protruding claws of the locking member are provided only on the extension line of the part where each window hole is provided, so when the mold is cut out after molding the resin tank, it can be placed opposite the inside of the resin tank. The projecting pawl does not interfere with the inner mold, and undercuts do not occur on the locking surface of the protruding pawl. As a result, the locking surface of the protruding pawl after molding becomes a uniform smooth surface, making it possible to support the support plate uniformly. Therefore, it becomes possible for the support plate to apply a uniform pressing force to the packing material, and the pressure resistance performance is improved.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of a heat exchanger according to a prior application. The second is a cross-sectional perspective view of a main part of a heat exchanger according to an embodiment of the present invention. FIG. 3 is an enlarged sectional view of the main part. Explanation of symbols of main parts, 8... Resin tank, 9... Seat plate portion, 9a... Seat, 9b... Locking member, 10, 11a, 15a... Through hole, 11...
Packing material, 12...tube, 13...window hole, 14...projection claw, 14a...locking surface, 15...
...Support plate, 15b... End portion, 15c... Flat portion.

Claims (1)

[Scope of utility model registration request] A seat plate portion having a plurality of through holes for attaching packing materials, and a pair of locking members that protrude in parallel from both sides of the seat plate portion and have protruding claws facing each other at both ends are integrated. A resin tank provided in the resin tank; equipped with through holes drilled separately to pass through each of the plurality of tubes; The packing material is attached to the mounting hole provided in the seat plate of the resin tank, and the packing material has through holes drilled separately corresponding to the through holes drilled in the packing material. a support plate that is in contact with the outer surface and has both ends locked on the locking surfaces of respective protruding claws provided so as to oppose each other to a pair of locking members of the resin tank; this support plate and packing material; In a heat exchanger consisting of a tube that communicates between both resin tanks by passing through a through hole of Window holes are provided at predetermined intervals that reach the lower surface of the seat plate part and whose lower ends reach the locking surface of the protruding claws of the locking member, and the protruding claws of the locking member are located on an extension line of the portion where each window hole is provided. A heat exchanger characterized in that only a heat exchanger is provided.